From 7adf3f422098cf294afae4f238f9aa97e6e7c220 Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Fri, 19 Jun 2020 15:25:52 +0300
Subject: [PATCH 01/34] Read proxy

---
 CHANGELOG.md                                  |   1 +
 .../lib/smart_contract/read_only_functions.js |   3 +-
 .../address_read_contract_controller.ex       |   1 +
 .../address_read_proxy_controller.ex          |  38 +++++++
 .../controllers/smart_contract_controller.ex  |   9 +-
 .../templates/address/_tabs.html.eex          |   7 ++
 .../address_read_contract/index.html.eex      |   2 +-
 .../address_read_proxy/_metatags.html.eex     |   1 +
 .../address_read_proxy/index.html.eex         |  19 ++++
 .../views/address_read_proxy_view.ex          |   7 ++
 .../lib/block_scout_web/views/address_view.ex |   8 ++
 .../lib/block_scout_web/web_router.ex         |   7 ++
 apps/block_scout_web/priv/gettext/default.pot |  37 ++++---
 .../priv/gettext/en/LC_MESSAGES/default.po    |  37 ++++---
 .../address_read_proxy_controller_test.exs    |  81 ++++++++++++++
 .../smart_contract_controller_test.exs        |  20 +++-
 .../views/address_read_proxy_view_test.exs    |  19 ++++
 apps/explorer/lib/explorer/chain.ex           | 101 +++++++++++++-----
 .../lib/explorer/smart_contract/reader.ex     |  19 ++++
 apps/explorer/test/explorer/chain_test.exs    |  56 +++++++++-
 .../explorer/smart_contract/reader_test.exs   |  93 ++++++++++++++++
 21 files changed, 496 insertions(+), 70 deletions(-)
 create mode 100644 apps/block_scout_web/lib/block_scout_web/controllers/address_read_proxy_controller.ex
 create mode 100644 apps/block_scout_web/lib/block_scout_web/templates/address_read_proxy/_metatags.html.eex
 create mode 100644 apps/block_scout_web/lib/block_scout_web/templates/address_read_proxy/index.html.eex
 create mode 100644 apps/block_scout_web/lib/block_scout_web/views/address_read_proxy_view.ex
 create mode 100644 apps/block_scout_web/test/block_scout_web/controllers/address_read_proxy_controller_test.exs
 create mode 100644 apps/block_scout_web/test/block_scout_web/views/address_read_proxy_view_test.exs

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 57abc3c063..177901e0ed 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
 ## Current
 
 ### Features
+- [#3157](https://github.com/poanetwork/blockscout/pull/3157) - Read methods of implementation on proxy contract
 
 ### Fixes
 
diff --git a/apps/block_scout_web/assets/js/lib/smart_contract/read_only_functions.js b/apps/block_scout_web/assets/js/lib/smart_contract/read_only_functions.js
index b7e6c9316c..43b5b171d9 100644
--- a/apps/block_scout_web/assets/js/lib/smart_contract/read_only_functions.js
+++ b/apps/block_scout_web/assets/js/lib/smart_contract/read_only_functions.js
@@ -4,10 +4,11 @@ const loadFunctions = (element) => {
   const $element = $(element)
   const url = $element.data('url')
   const hash = $element.data('hash')
+  const type = $element.data('type')
 
   $.get(
     url,
-    { hash: hash },
+    { hash: hash, type: type },
     response => $element.html(response)
   )
     .done(function () {
diff --git a/apps/block_scout_web/lib/block_scout_web/controllers/address_read_contract_controller.ex b/apps/block_scout_web/lib/block_scout_web/controllers/address_read_contract_controller.ex
index 130debf038..2be5e2995a 100644
--- a/apps/block_scout_web/lib/block_scout_web/controllers/address_read_contract_controller.ex
+++ b/apps/block_scout_web/lib/block_scout_web/controllers/address_read_contract_controller.ex
@@ -31,6 +31,7 @@ defmodule BlockScoutWeb.AddressReadContractController do
         conn,
         "index.html",
         address: address,
+        type: :regular,
         coin_balance_status: CoinBalanceOnDemand.trigger_fetch(address),
         exchange_rate: Market.get_exchange_rate(Explorer.coin()) || Token.null(),
         counters_path: address_path(conn, :address_counters, %{"id" => Address.checksum(address_hash)})
diff --git a/apps/block_scout_web/lib/block_scout_web/controllers/address_read_proxy_controller.ex b/apps/block_scout_web/lib/block_scout_web/controllers/address_read_proxy_controller.ex
new file mode 100644
index 0000000000..1d0ed7aeae
--- /dev/null
+++ b/apps/block_scout_web/lib/block_scout_web/controllers/address_read_proxy_controller.ex
@@ -0,0 +1,38 @@
+# credo:disable-for-this-file
+defmodule BlockScoutWeb.AddressReadProxyController do
+  use BlockScoutWeb, :controller
+
+  alias Explorer.{Chain, Market}
+  alias Explorer.Chain.Address
+  alias Explorer.ExchangeRates.Token
+  alias Indexer.Fetcher.CoinBalanceOnDemand
+
+  def index(conn, %{"address_id" => address_hash_string}) do
+    address_options = [
+      necessity_by_association: %{
+        :contracts_creation_internal_transaction => :optional,
+        :names => :optional,
+        :smart_contract => :optional,
+        :token => :optional,
+        :contracts_creation_transaction => :optional
+      }
+    ]
+
+    with {:ok, address_hash} <- Chain.string_to_address_hash(address_hash_string),
+         {:ok, address} <- Chain.find_contract_address(address_hash, address_options, true),
+         false <- is_nil(address.smart_contract) do
+      render(
+        conn,
+        "index.html",
+        address: address,
+        type: :proxy,
+        coin_balance_status: CoinBalanceOnDemand.trigger_fetch(address),
+        exchange_rate: Market.get_exchange_rate(Explorer.coin()) || Token.null(),
+        counters_path: address_path(conn, :address_counters, %{"id" => Address.checksum(address_hash)})
+      )
+    else
+      _ ->
+        not_found(conn)
+    end
+  end
+end
diff --git a/apps/block_scout_web/lib/block_scout_web/controllers/smart_contract_controller.ex b/apps/block_scout_web/lib/block_scout_web/controllers/smart_contract_controller.ex
index 16b0122c5b..7facded61c 100644
--- a/apps/block_scout_web/lib/block_scout_web/controllers/smart_contract_controller.ex
+++ b/apps/block_scout_web/lib/block_scout_web/controllers/smart_contract_controller.ex
@@ -4,11 +4,16 @@ defmodule BlockScoutWeb.SmartContractController do
   alias Explorer.Chain
   alias Explorer.SmartContract.Reader
 
-  def index(conn, %{"hash" => address_hash_string}) do
+  def index(conn, %{"hash" => address_hash_string, "type" => contract_type}) do
     with true <- ajax?(conn),
          {:ok, address_hash} <- Chain.string_to_address_hash(address_hash_string),
          {:ok, address} <- Chain.find_contract_address(address_hash) do
-      read_only_functions = Reader.read_only_functions(address_hash)
+      read_only_functions =
+        if contract_type == "proxy" do
+          Reader.read_only_functions_proxy(address_hash)
+        else
+          Reader.read_only_functions(address_hash)
+        end
 
       conn
       |> put_status(200)
diff --git a/apps/block_scout_web/lib/block_scout_web/templates/address/_tabs.html.eex b/apps/block_scout_web/lib/block_scout_web/templates/address/_tabs.html.eex
index b615035ac4..e872bf91e1 100644
--- a/apps/block_scout_web/lib/block_scout_web/templates/address/_tabs.html.eex
+++ b/apps/block_scout_web/lib/block_scout_web/templates/address/_tabs.html.eex
@@ -64,4 +64,11 @@
         class: "card-tab #{tab_status("read_contract", @conn.request_path)}")
         %>
   <% end %>
+  <%= if smart_contract_is_proxy?(@address) do %>
+    <%= link(
+        gettext("Read Proxy"),
+        to: address_read_proxy_path(@conn, :index, @address.hash),
+        class: "card-tab #{tab_status("read_proxy", @conn.request_path)}")
+        %>
+  <% end %>
 </div>
diff --git a/apps/block_scout_web/lib/block_scout_web/templates/address_read_contract/index.html.eex b/apps/block_scout_web/lib/block_scout_web/templates/address_read_contract/index.html.eex
index 6ba9117e3e..1ad7f03c7a 100644
--- a/apps/block_scout_web/lib/block_scout_web/templates/address_read_contract/index.html.eex
+++ b/apps/block_scout_web/lib/block_scout_web/templates/address_read_contract/index.html.eex
@@ -5,7 +5,7 @@
   <div class="card">
     <%= render BlockScoutWeb.AddressView, "_tabs.html", assigns %>
     <!-- loaded via AJAX -->
-    <div class="card-body" data-smart-contract-functions data-hash="<%= to_string(@address.hash) %>" data-url="<%= smart_contract_path(@conn, :index) %>">
+    <div class="card-body" data-smart-contract-functions data-hash="<%= to_string(@address.hash) %>" data-type="<%= @type %>" data-url="<%= smart_contract_path(@conn, :index) %>">
       <div>
         <span class="loading-spinner-small mr-2">
           <span class="loading-spinner-block-1"></span>
diff --git a/apps/block_scout_web/lib/block_scout_web/templates/address_read_proxy/_metatags.html.eex b/apps/block_scout_web/lib/block_scout_web/templates/address_read_proxy/_metatags.html.eex
new file mode 100644
index 0000000000..3ef2a67ca2
--- /dev/null
+++ b/apps/block_scout_web/lib/block_scout_web/templates/address_read_proxy/_metatags.html.eex
@@ -0,0 +1 @@
+<%= render BlockScoutWeb.AddressView, "_metatags.html", conn: @conn, address: @address %>
diff --git a/apps/block_scout_web/lib/block_scout_web/templates/address_read_proxy/index.html.eex b/apps/block_scout_web/lib/block_scout_web/templates/address_read_proxy/index.html.eex
new file mode 100644
index 0000000000..1ad7f03c7a
--- /dev/null
+++ b/apps/block_scout_web/lib/block_scout_web/templates/address_read_proxy/index.html.eex
@@ -0,0 +1,19 @@
+<section class="container">
+
+  <%= render BlockScoutWeb.AddressView, "overview.html", assigns %>
+
+  <div class="card">
+    <%= render BlockScoutWeb.AddressView, "_tabs.html", assigns %>
+    <!-- loaded via AJAX -->
+    <div class="card-body" data-smart-contract-functions data-hash="<%= to_string(@address.hash) %>" data-type="<%= @type %>" data-url="<%= smart_contract_path(@conn, :index) %>">
+      <div>
+        <span class="loading-spinner-small mr-2">
+          <span class="loading-spinner-block-1"></span>
+          <span class="loading-spinner-block-2"></span>
+        </span>
+        <%= gettext("Loading...") %>
+      </div>
+    </div>
+  </div>
+  <script defer data-cfasync="false" src="<%= static_path(@conn, "/js/smart-contract-helpers.js") %>"></script>
+</section>
diff --git a/apps/block_scout_web/lib/block_scout_web/views/address_read_proxy_view.ex b/apps/block_scout_web/lib/block_scout_web/views/address_read_proxy_view.ex
new file mode 100644
index 0000000000..0a36b3fc25
--- /dev/null
+++ b/apps/block_scout_web/lib/block_scout_web/views/address_read_proxy_view.ex
@@ -0,0 +1,7 @@
+defmodule BlockScoutWeb.AddressReadProxyView do
+  use BlockScoutWeb, :view
+
+  def queryable?(inputs), do: Enum.any?(inputs)
+
+  def address?(type), do: type == "address"
+end
diff --git a/apps/block_scout_web/lib/block_scout_web/views/address_view.ex b/apps/block_scout_web/lib/block_scout_web/views/address_view.ex
index 1b14c7b424..dd21d5b080 100644
--- a/apps/block_scout_web/lib/block_scout_web/views/address_view.ex
+++ b/apps/block_scout_web/lib/block_scout_web/views/address_view.ex
@@ -18,6 +18,7 @@ defmodule BlockScoutWeb.AddressView do
     "internal_transactions",
     "token_transfers",
     "read_contract",
+    "read_proxy",
     "tokens",
     "transactions",
     "validations"
@@ -228,6 +229,12 @@ defmodule BlockScoutWeb.AddressView do
 
   def smart_contract_with_read_only_functions?(%Address{smart_contract: nil}), do: false
 
+  def smart_contract_is_proxy?(%Address{smart_contract: %SmartContract{}} = address) do
+    Chain.is_proxy_contract?(address.smart_contract.abi)
+  end
+
+  def smart_contract_is_proxy?(%Address{smart_contract: nil}), do: false
+
   def has_decompiled_code?(address) do
     address.has_decompiled_code? ||
       (Ecto.assoc_loaded?(address.decompiled_smart_contracts) && Enum.count(address.decompiled_smart_contracts) > 0)
@@ -326,6 +333,7 @@ defmodule BlockScoutWeb.AddressView do
   defp tab_name(["contracts"]), do: gettext("Code")
   defp tab_name(["decompiled_contracts"]), do: gettext("Decompiled Code")
   defp tab_name(["read_contract"]), do: gettext("Read Contract")
+  defp tab_name(["read_proxy"]), do: gettext("Read Proxy")
   defp tab_name(["coin_balances"]), do: gettext("Coin Balance History")
   defp tab_name(["validations"]), do: gettext("Blocks Validated")
   defp tab_name(["logs"]), do: gettext("Logs")
diff --git a/apps/block_scout_web/lib/block_scout_web/web_router.ex b/apps/block_scout_web/lib/block_scout_web/web_router.ex
index 38abb8add5..9e754b37f6 100644
--- a/apps/block_scout_web/lib/block_scout_web/web_router.ex
+++ b/apps/block_scout_web/lib/block_scout_web/web_router.ex
@@ -125,6 +125,13 @@ defmodule BlockScoutWeb.WebRouter do
         as: :read_contract
       )
 
+      resources(
+        "/read_proxy",
+        AddressReadProxyController,
+        only: [:index, :show],
+        as: :read_proxy
+      )
+
       resources(
         "/token_transfers",
         AddressTokenTransferController,
diff --git a/apps/block_scout_web/priv/gettext/default.pot b/apps/block_scout_web/priv/gettext/default.pot
index ac3a6b36cb..fb4c6844f0 100644
--- a/apps/block_scout_web/priv/gettext/default.pot
+++ b/apps/block_scout_web/priv/gettext/default.pot
@@ -124,7 +124,7 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/address/_validator_metadata_modal.html.eex:16
 #: lib/block_scout_web/templates/transaction_log/_logs.html.eex:19
-#: lib/block_scout_web/views/address_view.ex:100
+#: lib/block_scout_web/views/address_view.ex:101
 msgid "Address"
 msgstr ""
 
@@ -338,14 +338,14 @@ msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address_contract_verification/new.html.eex:18
-#: lib/block_scout_web/views/address_view.ex:98
+#: lib/block_scout_web/views/address_view.ex:99
 msgid "Contract Address"
 msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/transaction/_pending_tile.html.eex:16
-#: lib/block_scout_web/views/address_view.ex:38
-#: lib/block_scout_web/views/address_view.ex:72
+#: lib/block_scout_web/views/address_view.ex:39
+#: lib/block_scout_web/views/address_view.ex:73
 msgid "Contract Address Pending"
 msgstr ""
 
@@ -903,7 +903,7 @@ msgstr ""
 #: lib/block_scout_web/templates/tokens/transfer/index.html.eex:14
 #: lib/block_scout_web/templates/transaction/_tabs.html.eex:4
 #: lib/block_scout_web/templates/transaction_token_transfer/index.html.eex:7
-#: lib/block_scout_web/views/address_view.ex:325
+#: lib/block_scout_web/views/address_view.ex:332
 #: lib/block_scout_web/views/tokens/instance/overview_view.ex:98
 #: lib/block_scout_web/views/tokens/overview_view.ex:35
 #: lib/block_scout_web/views/transaction_view.ex:394
@@ -1011,6 +1011,7 @@ msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address_read_contract/index.html.eex:14
+#: lib/block_scout_web/templates/address_read_proxy/index.html.eex:14
 #: lib/block_scout_web/templates/tokens/read_contract/index.html.eex:20
 msgid "Loading..."
 msgstr ""
@@ -1041,7 +1042,7 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/chain/show.html.eex:52
 #: lib/block_scout_web/templates/layout/app.html.eex:30
-#: lib/block_scout_web/views/address_view.ex:138
+#: lib/block_scout_web/views/address_view.ex:139
 msgid "Market Cap"
 msgstr ""
 
@@ -1807,7 +1808,7 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:37
 #: lib/block_scout_web/templates/address_validation/index.html.eex:13
-#: lib/block_scout_web/views/address_view.ex:330
+#: lib/block_scout_web/views/address_view.ex:338
 msgid "Blocks Validated"
 msgstr ""
 
@@ -1817,18 +1818,18 @@ msgstr ""
 #: lib/block_scout_web/templates/api_docs/_action_tile.html.eex:187
 #: lib/block_scout_web/templates/api_docs/_eth_rpc_item.html.eex:126
 #: lib/block_scout_web/templates/api_docs/_eth_rpc_item.html.eex:149
-#: lib/block_scout_web/views/address_view.ex:326
+#: lib/block_scout_web/views/address_view.ex:333
 msgid "Code"
 msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:26
-#: lib/block_scout_web/views/address_view.ex:329
+#: lib/block_scout_web/views/address_view.ex:337
 msgid "Coin Balance History"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/views/address_view.ex:327
+#: lib/block_scout_web/views/address_view.ex:334
 msgid "Decompiled Code"
 msgstr ""
 
@@ -1837,7 +1838,7 @@ msgstr ""
 #: lib/block_scout_web/templates/address_internal_transaction/index.html.eex:19
 #: lib/block_scout_web/templates/transaction/_tabs.html.eex:11
 #: lib/block_scout_web/templates/transaction_internal_transaction/index.html.eex:6
-#: lib/block_scout_web/views/address_view.ex:324
+#: lib/block_scout_web/views/address_view.ex:331
 #: lib/block_scout_web/views/transaction_view.ex:395
 msgid "Internal Transactions"
 msgstr ""
@@ -1847,7 +1848,7 @@ msgstr ""
 #: lib/block_scout_web/templates/address_logs/index.html.eex:8
 #: lib/block_scout_web/templates/transaction/_tabs.html.eex:17
 #: lib/block_scout_web/templates/transaction_log/index.html.eex:8
-#: lib/block_scout_web/views/address_view.ex:331
+#: lib/block_scout_web/views/address_view.ex:339
 #: lib/block_scout_web/views/transaction_view.ex:396
 msgid "Logs"
 msgstr ""
@@ -1855,7 +1856,7 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:62
 #: lib/block_scout_web/templates/tokens/overview/_tabs.html.eex:25
-#: lib/block_scout_web/views/address_view.ex:328
+#: lib/block_scout_web/views/address_view.ex:335
 #: lib/block_scout_web/views/tokens/overview_view.ex:37
 msgid "Read Contract"
 msgstr ""
@@ -1864,7 +1865,7 @@ msgstr ""
 #: lib/block_scout_web/templates/address/_tabs.html.eex:14
 #: lib/block_scout_web/templates/address_token/index.html.eex:8
 #: lib/block_scout_web/templates/address_token_transfer/index.html.eex:11
-#: lib/block_scout_web/views/address_view.ex:322
+#: lib/block_scout_web/views/address_view.ex:329
 msgid "Tokens"
 msgstr ""
 
@@ -1876,7 +1877,7 @@ msgstr ""
 #: lib/block_scout_web/templates/block_transaction/index.html.eex:18
 #: lib/block_scout_web/templates/chain/show.html.eex:184
 #: lib/block_scout_web/templates/layout/_topnav.html.eex:50
-#: lib/block_scout_web/views/address_view.ex:323
+#: lib/block_scout_web/views/address_view.ex:330
 msgid "Transactions"
 msgstr ""
 
@@ -1913,3 +1914,9 @@ msgstr ""
 #: lib/block_scout_web/templates/transaction/overview.html.eex:58
 msgid "Revert reason"
 msgstr ""
+
+#, elixir-format
+#: lib/block_scout_web/templates/address/_tabs.html.eex:69
+#: lib/block_scout_web/views/address_view.ex:336
+msgid "Read Proxy"
+msgstr ""
diff --git a/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po b/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po
index ac3a6b36cb..fb4c6844f0 100644
--- a/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po
+++ b/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po
@@ -124,7 +124,7 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/address/_validator_metadata_modal.html.eex:16
 #: lib/block_scout_web/templates/transaction_log/_logs.html.eex:19
-#: lib/block_scout_web/views/address_view.ex:100
+#: lib/block_scout_web/views/address_view.ex:101
 msgid "Address"
 msgstr ""
 
@@ -338,14 +338,14 @@ msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address_contract_verification/new.html.eex:18
-#: lib/block_scout_web/views/address_view.ex:98
+#: lib/block_scout_web/views/address_view.ex:99
 msgid "Contract Address"
 msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/transaction/_pending_tile.html.eex:16
-#: lib/block_scout_web/views/address_view.ex:38
-#: lib/block_scout_web/views/address_view.ex:72
+#: lib/block_scout_web/views/address_view.ex:39
+#: lib/block_scout_web/views/address_view.ex:73
 msgid "Contract Address Pending"
 msgstr ""
 
@@ -903,7 +903,7 @@ msgstr ""
 #: lib/block_scout_web/templates/tokens/transfer/index.html.eex:14
 #: lib/block_scout_web/templates/transaction/_tabs.html.eex:4
 #: lib/block_scout_web/templates/transaction_token_transfer/index.html.eex:7
-#: lib/block_scout_web/views/address_view.ex:325
+#: lib/block_scout_web/views/address_view.ex:332
 #: lib/block_scout_web/views/tokens/instance/overview_view.ex:98
 #: lib/block_scout_web/views/tokens/overview_view.ex:35
 #: lib/block_scout_web/views/transaction_view.ex:394
@@ -1011,6 +1011,7 @@ msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address_read_contract/index.html.eex:14
+#: lib/block_scout_web/templates/address_read_proxy/index.html.eex:14
 #: lib/block_scout_web/templates/tokens/read_contract/index.html.eex:20
 msgid "Loading..."
 msgstr ""
@@ -1041,7 +1042,7 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/chain/show.html.eex:52
 #: lib/block_scout_web/templates/layout/app.html.eex:30
-#: lib/block_scout_web/views/address_view.ex:138
+#: lib/block_scout_web/views/address_view.ex:139
 msgid "Market Cap"
 msgstr ""
 
@@ -1807,7 +1808,7 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:37
 #: lib/block_scout_web/templates/address_validation/index.html.eex:13
-#: lib/block_scout_web/views/address_view.ex:330
+#: lib/block_scout_web/views/address_view.ex:338
 msgid "Blocks Validated"
 msgstr ""
 
@@ -1817,18 +1818,18 @@ msgstr ""
 #: lib/block_scout_web/templates/api_docs/_action_tile.html.eex:187
 #: lib/block_scout_web/templates/api_docs/_eth_rpc_item.html.eex:126
 #: lib/block_scout_web/templates/api_docs/_eth_rpc_item.html.eex:149
-#: lib/block_scout_web/views/address_view.ex:326
+#: lib/block_scout_web/views/address_view.ex:333
 msgid "Code"
 msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:26
-#: lib/block_scout_web/views/address_view.ex:329
+#: lib/block_scout_web/views/address_view.ex:337
 msgid "Coin Balance History"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/views/address_view.ex:327
+#: lib/block_scout_web/views/address_view.ex:334
 msgid "Decompiled Code"
 msgstr ""
 
@@ -1837,7 +1838,7 @@ msgstr ""
 #: lib/block_scout_web/templates/address_internal_transaction/index.html.eex:19
 #: lib/block_scout_web/templates/transaction/_tabs.html.eex:11
 #: lib/block_scout_web/templates/transaction_internal_transaction/index.html.eex:6
-#: lib/block_scout_web/views/address_view.ex:324
+#: lib/block_scout_web/views/address_view.ex:331
 #: lib/block_scout_web/views/transaction_view.ex:395
 msgid "Internal Transactions"
 msgstr ""
@@ -1847,7 +1848,7 @@ msgstr ""
 #: lib/block_scout_web/templates/address_logs/index.html.eex:8
 #: lib/block_scout_web/templates/transaction/_tabs.html.eex:17
 #: lib/block_scout_web/templates/transaction_log/index.html.eex:8
-#: lib/block_scout_web/views/address_view.ex:331
+#: lib/block_scout_web/views/address_view.ex:339
 #: lib/block_scout_web/views/transaction_view.ex:396
 msgid "Logs"
 msgstr ""
@@ -1855,7 +1856,7 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:62
 #: lib/block_scout_web/templates/tokens/overview/_tabs.html.eex:25
-#: lib/block_scout_web/views/address_view.ex:328
+#: lib/block_scout_web/views/address_view.ex:335
 #: lib/block_scout_web/views/tokens/overview_view.ex:37
 msgid "Read Contract"
 msgstr ""
@@ -1864,7 +1865,7 @@ msgstr ""
 #: lib/block_scout_web/templates/address/_tabs.html.eex:14
 #: lib/block_scout_web/templates/address_token/index.html.eex:8
 #: lib/block_scout_web/templates/address_token_transfer/index.html.eex:11
-#: lib/block_scout_web/views/address_view.ex:322
+#: lib/block_scout_web/views/address_view.ex:329
 msgid "Tokens"
 msgstr ""
 
@@ -1876,7 +1877,7 @@ msgstr ""
 #: lib/block_scout_web/templates/block_transaction/index.html.eex:18
 #: lib/block_scout_web/templates/chain/show.html.eex:184
 #: lib/block_scout_web/templates/layout/_topnav.html.eex:50
-#: lib/block_scout_web/views/address_view.ex:323
+#: lib/block_scout_web/views/address_view.ex:330
 msgid "Transactions"
 msgstr ""
 
@@ -1913,3 +1914,9 @@ msgstr ""
 #: lib/block_scout_web/templates/transaction/overview.html.eex:58
 msgid "Revert reason"
 msgstr ""
+
+#, elixir-format
+#: lib/block_scout_web/templates/address/_tabs.html.eex:69
+#: lib/block_scout_web/views/address_view.ex:336
+msgid "Read Proxy"
+msgstr ""
diff --git a/apps/block_scout_web/test/block_scout_web/controllers/address_read_proxy_controller_test.exs b/apps/block_scout_web/test/block_scout_web/controllers/address_read_proxy_controller_test.exs
new file mode 100644
index 0000000000..97f3b7204c
--- /dev/null
+++ b/apps/block_scout_web/test/block_scout_web/controllers/address_read_proxy_controller_test.exs
@@ -0,0 +1,81 @@
+defmodule BlockScoutWeb.AddressReadProxyControllerTest do
+  use BlockScoutWeb.ConnCase, async: true
+
+  alias Explorer.ExchangeRates.Token
+  alias Explorer.Chain.Address
+
+  import Mox
+
+  describe "GET index/3" do
+    setup :set_mox_global
+
+    setup do
+      configuration = Application.get_env(:explorer, :checksum_function)
+      Application.put_env(:explorer, :checksum_function, :eth)
+
+      :ok
+
+      on_exit(fn ->
+        Application.put_env(:explorer, :checksum_function, configuration)
+      end)
+    end
+
+    test "with invalid address hash", %{conn: conn} do
+      conn = get(conn, address_read_contract_path(BlockScoutWeb.Endpoint, :index, "invalid_address"))
+
+      assert html_response(conn, 404)
+    end
+
+    test "with valid address that is not a contract", %{conn: conn} do
+      address = insert(:address)
+
+      conn = get(conn, address_read_contract_path(BlockScoutWeb.Endpoint, :index, Address.checksum(address.hash)))
+
+      assert html_response(conn, 404)
+    end
+
+    test "successfully renders the page when the address is a contract", %{conn: conn} do
+      contract_address = insert(:contract_address)
+
+      transaction = insert(:transaction, from_address: contract_address) |> with_block()
+
+      insert(
+        :internal_transaction_create,
+        index: 0,
+        transaction: transaction,
+        created_contract_address: contract_address,
+        block_hash: transaction.block_hash,
+        block_index: 0
+      )
+
+      insert(:smart_contract, address_hash: contract_address.hash)
+
+      conn =
+        get(conn, address_read_contract_path(BlockScoutWeb.Endpoint, :index, Address.checksum(contract_address.hash)))
+
+      assert html_response(conn, 200)
+      assert contract_address.hash == conn.assigns.address.hash
+      assert %Token{} = conn.assigns.exchange_rate
+    end
+
+    test "returns not found for an unverified contract", %{conn: conn} do
+      contract_address = insert(:contract_address)
+
+      transaction = insert(:transaction, from_address: contract_address) |> with_block()
+
+      insert(
+        :internal_transaction_create,
+        index: 0,
+        transaction: transaction,
+        created_contract_address: contract_address,
+        block_hash: transaction.block_hash,
+        block_index: 0
+      )
+
+      conn =
+        get(conn, address_read_contract_path(BlockScoutWeb.Endpoint, :index, Address.checksum(contract_address.hash)))
+
+      assert html_response(conn, 404)
+    end
+  end
+end
diff --git a/apps/block_scout_web/test/block_scout_web/controllers/smart_contract_controller_test.exs b/apps/block_scout_web/test/block_scout_web/controllers/smart_contract_controller_test.exs
index 5e4f723b75..6f86fda3f3 100644
--- a/apps/block_scout_web/test/block_scout_web/controllers/smart_contract_controller_test.exs
+++ b/apps/block_scout_web/test/block_scout_web/controllers/smart_contract_controller_test.exs
@@ -22,7 +22,7 @@ defmodule BlockScoutWeb.SmartContractControllerTest do
     end
 
     test "error for invalid address" do
-      path = smart_contract_path(BlockScoutWeb.Endpoint, :index, hash: "0x00")
+      path = smart_contract_path(BlockScoutWeb.Endpoint, :index, hash: "0x00", type: "regular")
 
       conn =
         build_conn()
@@ -49,7 +49,7 @@ defmodule BlockScoutWeb.SmartContractControllerTest do
 
       blockchain_get_function_mock()
 
-      path = smart_contract_path(BlockScoutWeb.Endpoint, :index, hash: token_contract_address.hash)
+      path = smart_contract_path(BlockScoutWeb.Endpoint, :index, hash: token_contract_address.hash, type: "regular")
 
       conn =
         build_conn()
@@ -59,6 +59,22 @@ defmodule BlockScoutWeb.SmartContractControllerTest do
       assert conn.status == 200
       refute conn.assigns.read_only_functions == []
     end
+
+    test "lists [] proxy read only functions if no verified implementation" do
+      token_contract_address = insert(:contract_address)
+
+      insert(:smart_contract, address_hash: token_contract_address.hash)
+
+      path = smart_contract_path(BlockScoutWeb.Endpoint, :index, hash: token_contract_address.hash, type: "proxy")
+
+      conn =
+        build_conn()
+        |> put_req_header("x-requested-with", "xmlhttprequest")
+        |> get(path)
+
+      assert conn.status == 200
+      assert conn.assigns.read_only_functions == []
+    end
   end
 
   describe "GET show/3" do
diff --git a/apps/block_scout_web/test/block_scout_web/views/address_read_proxy_view_test.exs b/apps/block_scout_web/test/block_scout_web/views/address_read_proxy_view_test.exs
new file mode 100644
index 0000000000..cf1b6fd8e9
--- /dev/null
+++ b/apps/block_scout_web/test/block_scout_web/views/address_read_proxy_view_test.exs
@@ -0,0 +1,19 @@
+defmodule BlockScoutWeb.AddressReadProxyViewTest do
+  use BlockScoutWeb.ConnCase, async: true
+
+  alias BlockScoutWeb.AddressReadProxyView
+
+  describe "queryable?/1" do
+    test "returns true if list of inputs is not empty" do
+      assert AddressReadProxyView.queryable?([%{"name" => "argument_name", "type" => "uint256"}]) == true
+      assert AddressReadProxyView.queryable?([]) == false
+    end
+  end
+
+  describe "address?/1" do
+    test "returns true if type equals `address`" do
+      assert AddressReadProxyView.address?("address") == true
+      assert AddressReadProxyView.address?("uint256") == false
+    end
+  end
+end
diff --git a/apps/explorer/lib/explorer/chain.ex b/apps/explorer/lib/explorer/chain.ex
index b0a7f06de9..e17cbc4f75 100644
--- a/apps/explorer/lib/explorer/chain.ex
+++ b/apps/explorer/lib/explorer/chain.ex
@@ -4338,53 +4338,96 @@ defmodule Explorer.Chain do
     end
   end
 
-  def combine_proxy_implementation_abi(address_hash, abi) when not is_nil(abi) do
+  def combine_proxy_implementation_abi(proxy_address_hash, abi) when not is_nil(abi) do
+    implementation_abi = get_implementation_abi_from_proxy(proxy_address_hash, abi)
+
+    if Enum.empty?(implementation_abi), do: abi, else: implementation_abi ++ abi
+  end
+
+  def combine_proxy_implementation_abi(_, abi) when is_nil(abi) do
+    []
+  end
+
+  def is_proxy_contract?(abi) when not is_nil(abi) do
     implementation_method_abi =
       abi
       |> Enum.find(fn method ->
         Map.get(method, "name") == "implementation"
       end)
 
-    implementation_abi =
-      if implementation_method_abi do
-        implementation_address =
-          case Reader.query_contract(address_hash, abi, %{
-                 "implementation" => []
-               }) do
-            %{"implementation" => {:ok, [result]}} -> result
-            _ -> nil
-          end
+    if implementation_method_abi, do: true, else: false
+  end
 
-        if implementation_address do
-          implementation_address_hash_string = "0x" <> Base.encode16(implementation_address, case: :lower)
+  def is_proxy_contract?(abi) when is_nil(abi) do
+    false
+  end
 
-          case Chain.string_to_address_hash(implementation_address_hash_string) do
-            {:ok, implementation_address_hash} ->
-              implementation_smart_contract =
-                implementation_address_hash
-                |> Chain.address_hash_to_smart_contract()
+  def get_implementation_address_hash(proxy_address_hash, abi)
+      when not is_nil(proxy_address_hash) and not is_nil(abi) do
+    implementation_address =
+      case Reader.query_contract(proxy_address_hash, abi, %{
+             "implementation" => []
+           }) do
+        %{"implementation" => {:ok, [result]}} -> result
+        _ -> nil
+      end
+
+    if implementation_address do
+      "0x" <> Base.encode16(implementation_address, case: :lower)
+    else
+      nil
+    end
+  end
 
-              if implementation_smart_contract do
-                implementation_smart_contract
-                |> Map.get(:abi)
-              else
-                []
-              end
+  def get_implementation_address_hash(proxy_address_hash, abi) when is_nil(proxy_address_hash) or is_nil(abi) do
+    nil
+  end
 
-            _ ->
-              []
-          end
+  defp get_implementation_abi(implementation_address_hash_string) when not is_nil(implementation_address_hash_string) do
+    case Chain.string_to_address_hash(implementation_address_hash_string) do
+      {:ok, implementation_address_hash} ->
+        implementation_smart_contract =
+          implementation_address_hash
+          |> Chain.address_hash_to_smart_contract()
+
+        if implementation_smart_contract do
+          implementation_smart_contract
+          |> Map.get(:abi)
         else
           []
         end
+
+      _ ->
+        []
+    end
+  end
+
+  defp get_implementation_abi(implementation_address_hash_string) when is_nil(implementation_address_hash_string) do
+    []
+  end
+
+  def get_implementation_abi_from_proxy(proxy_address_hash, abi)
+      when not is_nil(proxy_address_hash) and not is_nil(abi) do
+    implementation_method_abi =
+      abi
+      |> Enum.find(fn method ->
+        Map.get(method, "name") == "implementation"
+      end)
+
+    if implementation_method_abi do
+      implementation_address_hash_string = get_implementation_address_hash(proxy_address_hash, abi)
+
+      if implementation_address_hash_string do
+        get_implementation_abi(implementation_address_hash_string)
       else
         []
       end
-
-    if Enum.empty?(implementation_abi), do: abi, else: implementation_abi ++ abi
+    else
+      []
+    end
   end
 
-  def combine_proxy_implementation_abi(_, abi) when is_nil(abi) do
+  def get_implementation_abi_from_proxy(proxy_address_hash, abi) when is_nil(proxy_address_hash) or is_nil(abi) do
     []
   end
 
diff --git a/apps/explorer/lib/explorer/smart_contract/reader.ex b/apps/explorer/lib/explorer/smart_contract/reader.ex
index 3e25f126e1..9695a427d6 100644
--- a/apps/explorer/lib/explorer/smart_contract/reader.ex
+++ b/apps/explorer/lib/explorer/smart_contract/reader.ex
@@ -180,6 +180,25 @@ defmodule Explorer.SmartContract.Reader do
     end
   end
 
+  def read_only_functions_proxy(contract_address_hash) do
+    abi =
+      contract_address_hash
+      |> Chain.address_hash_to_smart_contract()
+      |> Map.get(:abi)
+
+    implementation_abi = Chain.get_implementation_abi_from_proxy(contract_address_hash, abi)
+
+    case implementation_abi do
+      nil ->
+        []
+
+      _ ->
+        implementation_abi
+        |> Enum.filter(&(&1["constant"] || &1["stateMutability"] == "view"))
+        |> Enum.map(&fetch_current_value_from_blockchain(&1, implementation_abi, contract_address_hash))
+    end
+  end
+
   defp fetch_current_value_from_blockchain(function, abi, contract_address_hash) do
     values =
       case function do
diff --git a/apps/explorer/test/explorer/chain_test.exs b/apps/explorer/test/explorer/chain_test.exs
index e374ab492c..639dc51688 100644
--- a/apps/explorer/test/explorer/chain_test.exs
+++ b/apps/explorer/test/explorer/chain_test.exs
@@ -5194,7 +5194,7 @@ defmodule Explorer.ChainTest do
     end
   end
 
-  describe "combine_proxy_implementation_abi/2" do
+  describe "proxy contracts features" do
     @proxy_abi [
       %{
         "type" => "function",
@@ -5316,23 +5316,23 @@ defmodule Explorer.ChainTest do
       }
     ]
 
-    test "returns empty [] abi if proxy abi is null" do
+    test "combine_proxy_implementation_abi/2 returns empty [] abi if proxy abi is null" do
       proxy_contract_address = insert(:contract_address)
       assert Chain.combine_proxy_implementation_abi(proxy_contract_address, nil) == []
     end
 
-    test "returns [] abi for unverified proxy" do
+    test "combine_proxy_implementation_abi/2 returns [] abi for unverified proxy" do
       proxy_contract_address = insert(:contract_address)
       assert Chain.combine_proxy_implementation_abi(proxy_contract_address, []) == []
     end
 
-    test "returns proxy abi if implementation is not verified" do
+    test "combine_proxy_implementation_abi/2 returns proxy abi if implementation is not verified" do
       proxy_contract_address = insert(:contract_address)
       insert(:smart_contract, address_hash: proxy_contract_address.hash, abi: @proxy_abi)
       assert Chain.combine_proxy_implementation_abi(proxy_contract_address, @proxy_abi) == @proxy_abi
     end
 
-    test "returns proxy + implementation abi if implementation is verified" do
+    test "combine_proxy_implementation_abi/2 returns proxy + implementation abi if implementation is verified" do
       proxy_contract_address = insert(:contract_address)
       insert(:smart_contract, address_hash: proxy_contract_address.hash, abi: @proxy_abi)
 
@@ -5364,5 +5364,51 @@ defmodule Explorer.ChainTest do
       assert Enum.any?(combined_abi, fn el -> el == Enum.at(@implementation_abi, 0) end) == true
       assert Enum.any?(combined_abi, fn el -> el == Enum.at(@implementation_abi, 1) end) == true
     end
+
+    test "get_implementation_abi_from_proxy/2 returns empty [] abi if proxy abi is null" do
+      proxy_contract_address = insert(:contract_address)
+      assert Chain.get_implementation_abi_from_proxy(proxy_contract_address, nil) == []
+    end
+
+    test "get_implementation_abi_from_proxy/2 returns [] abi for unverified proxy" do
+      proxy_contract_address = insert(:contract_address)
+      assert Chain.combine_proxy_implementation_abi(proxy_contract_address, []) == []
+    end
+
+    test "get_implementation_abi_from_proxy/2 returns [] if implementation is not verified" do
+      proxy_contract_address = insert(:contract_address)
+      insert(:smart_contract, address_hash: proxy_contract_address.hash, abi: @proxy_abi)
+      assert Chain.get_implementation_abi_from_proxy(proxy_contract_address, @proxy_abi) == []
+    end
+
+    test "get_implementation_abi_from_proxy/2 returns implementation abi if implementation is verified" do
+      proxy_contract_address = insert(:contract_address)
+      insert(:smart_contract, address_hash: proxy_contract_address.hash, abi: @proxy_abi)
+
+      implementation_contract_address = insert(:contract_address)
+      insert(:smart_contract, address_hash: implementation_contract_address.hash, abi: @implementation_abi)
+
+      implementation_contract_address_hash_string =
+        Base.encode16(implementation_contract_address.hash.bytes, case: :lower)
+
+      expect(
+        EthereumJSONRPC.Mox,
+        :json_rpc,
+        fn [%{id: id, method: _, params: [%{data: _, to: _}, _]}], _options ->
+          {:ok,
+           [
+             %{
+               id: id,
+               jsonrpc: "2.0",
+               result: "0x000000000000000000000000" <> implementation_contract_address_hash_string
+             }
+           ]}
+        end
+      )
+
+      implementation_abi = Chain.get_implementation_abi_from_proxy(proxy_contract_address.hash, @proxy_abi)
+
+      assert implementation_abi == @implementation_abi
+    end
   end
 end
diff --git a/apps/explorer/test/explorer/smart_contract/reader_test.exs b/apps/explorer/test/explorer/smart_contract/reader_test.exs
index 82f0a54385..224a52e024 100644
--- a/apps/explorer/test/explorer/smart_contract/reader_test.exs
+++ b/apps/explorer/test/explorer/smart_contract/reader_test.exs
@@ -169,6 +169,99 @@ defmodule Explorer.SmartContract.ReaderTest do
     end
   end
 
+  describe "read_only_functions_proxy/1" do
+    test "fetches the smart contract proxy read only functions with the blockchain value" do
+      proxy_smart_contract =
+        insert(:smart_contract,
+          abi: [
+            %{
+              "type" => "function",
+              "stateMutability" => "view",
+              "payable" => false,
+              "outputs" => [
+                %{
+                  "type" => "address",
+                  "name" => ""
+                }
+              ],
+              "name" => "implementation",
+              "inputs" => [],
+              "constant" => true
+            }
+          ]
+        )
+
+      implementation_contract_address = insert(:contract_address)
+
+      insert(:smart_contract,
+        address_hash: implementation_contract_address.hash,
+        abi: [
+          %{
+            "constant" => true,
+            "inputs" => [],
+            "name" => "get",
+            "outputs" => [%{"name" => "", "type" => "uint256"}],
+            "payable" => false,
+            "stateMutability" => "view",
+            "type" => "function"
+          },
+          %{
+            "constant" => true,
+            "inputs" => [%{"name" => "x", "type" => "uint256"}],
+            "name" => "with_arguments",
+            "outputs" => [%{"name" => "", "type" => "bool"}],
+            "payable" => false,
+            "stateMutability" => "view",
+            "type" => "function"
+          }
+        ]
+      )
+
+      implementation_contract_address_hash_string =
+        Base.encode16(implementation_contract_address.hash.bytes, case: :lower)
+
+      expect(
+        EthereumJSONRPC.Mox,
+        :json_rpc,
+        fn [%{id: id, method: _, params: [%{data: _, to: _}, _]}], _options ->
+          {:ok,
+           [
+             %{
+               id: id,
+               jsonrpc: "2.0",
+               result: "0x000000000000000000000000" <> implementation_contract_address_hash_string
+             }
+           ]}
+        end
+      )
+
+      blockchain_get_function_mock()
+
+      response = Reader.read_only_functions_proxy(proxy_smart_contract.address_hash)
+
+      assert [
+               %{
+                 "constant" => true,
+                 "inputs" => [],
+                 "name" => "get",
+                 "outputs" => [%{"name" => "", "type" => "uint256", "value" => 0}],
+                 "payable" => _,
+                 "stateMutability" => _,
+                 "type" => _
+               },
+               %{
+                 "constant" => true,
+                 "inputs" => [%{"name" => "x", "type" => "uint256"}],
+                 "name" => "with_arguments",
+                 "outputs" => [%{"name" => "", "type" => "bool", "value" => ""}],
+                 "payable" => _,
+                 "stateMutability" => _,
+                 "type" => _
+               }
+             ] = response
+    end
+  end
+
   describe "query_function/2" do
     test "given the arguments, fetches the function value from the blockchain" do
       smart_contract = insert(:smart_contract)

From be69a0ce179228c9790a032c58879d8a601d4153 Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Fri, 19 Jun 2020 19:18:45 +0300
Subject: [PATCH 02/34] Proxy reader: handle function with params

---
 .../controllers/smart_contract_controller.ex  | 17 ++++++++++++--
 .../address_read_proxy_controller_test.exs    | 10 ++++----
 .../smart_contract_controller_test.exs        |  6 ++---
 .../lib/explorer/smart_contract/reader.ex     | 23 ++++++++++++-------
 .../explorer/smart_contract/reader_test.exs   |  6 ++---
 5 files changed, 40 insertions(+), 22 deletions(-)

diff --git a/apps/block_scout_web/lib/block_scout_web/controllers/smart_contract_controller.ex b/apps/block_scout_web/lib/block_scout_web/controllers/smart_contract_controller.ex
index 7facded61c..32d29964f5 100644
--- a/apps/block_scout_web/lib/block_scout_web/controllers/smart_contract_controller.ex
+++ b/apps/block_scout_web/lib/block_scout_web/controllers/smart_contract_controller.ex
@@ -38,13 +38,26 @@ defmodule BlockScoutWeb.SmartContractController do
   def index(conn, _), do: not_found(conn)
 
   def show(conn, params) do
+    address_options = [
+      necessity_by_association: %{
+        :contracts_creation_internal_transaction => :optional,
+        :names => :optional,
+        :smart_contract => :optional,
+        :token => :optional,
+        :contracts_creation_transaction => :optional
+      }
+    ]
+
     with true <- ajax?(conn),
          {:ok, address_hash} <- Chain.string_to_address_hash(params["id"]),
-         :ok <- Chain.check_contract_address_exists(address_hash) do
+         {:ok, address} <- Chain.find_contract_address(address_hash, address_options, true) do
+      contract_type = if Chain.is_proxy_contract?(address.smart_contract.abi), do: :proxy, else: :regular
+
       outputs =
         Reader.query_function(
           address_hash,
-          %{name: params["function_name"], args: params["args"]}
+          %{name: params["function_name"], args: params["args"]},
+          contract_type
         )
 
       conn
diff --git a/apps/block_scout_web/test/block_scout_web/controllers/address_read_proxy_controller_test.exs b/apps/block_scout_web/test/block_scout_web/controllers/address_read_proxy_controller_test.exs
index 97f3b7204c..3c37905cf9 100644
--- a/apps/block_scout_web/test/block_scout_web/controllers/address_read_proxy_controller_test.exs
+++ b/apps/block_scout_web/test/block_scout_web/controllers/address_read_proxy_controller_test.exs
@@ -21,7 +21,7 @@ defmodule BlockScoutWeb.AddressReadProxyControllerTest do
     end
 
     test "with invalid address hash", %{conn: conn} do
-      conn = get(conn, address_read_contract_path(BlockScoutWeb.Endpoint, :index, "invalid_address"))
+      conn = get(conn, address_read_proxy_path(BlockScoutWeb.Endpoint, :index, "invalid_address"))
 
       assert html_response(conn, 404)
     end
@@ -29,7 +29,7 @@ defmodule BlockScoutWeb.AddressReadProxyControllerTest do
     test "with valid address that is not a contract", %{conn: conn} do
       address = insert(:address)
 
-      conn = get(conn, address_read_contract_path(BlockScoutWeb.Endpoint, :index, Address.checksum(address.hash)))
+      conn = get(conn, address_read_proxy_path(BlockScoutWeb.Endpoint, :index, Address.checksum(address.hash)))
 
       assert html_response(conn, 404)
     end
@@ -50,8 +50,7 @@ defmodule BlockScoutWeb.AddressReadProxyControllerTest do
 
       insert(:smart_contract, address_hash: contract_address.hash)
 
-      conn =
-        get(conn, address_read_contract_path(BlockScoutWeb.Endpoint, :index, Address.checksum(contract_address.hash)))
+      conn = get(conn, address_read_proxy_path(BlockScoutWeb.Endpoint, :index, Address.checksum(contract_address.hash)))
 
       assert html_response(conn, 200)
       assert contract_address.hash == conn.assigns.address.hash
@@ -72,8 +71,7 @@ defmodule BlockScoutWeb.AddressReadProxyControllerTest do
         block_index: 0
       )
 
-      conn =
-        get(conn, address_read_contract_path(BlockScoutWeb.Endpoint, :index, Address.checksum(contract_address.hash)))
+      conn = get(conn, address_read_proxy_path(BlockScoutWeb.Endpoint, :index, Address.checksum(contract_address.hash)))
 
       assert html_response(conn, 404)
     end
diff --git a/apps/block_scout_web/test/block_scout_web/controllers/smart_contract_controller_test.exs b/apps/block_scout_web/test/block_scout_web/controllers/smart_contract_controller_test.exs
index 6f86fda3f3..dd22dd3144 100644
--- a/apps/block_scout_web/test/block_scout_web/controllers/smart_contract_controller_test.exs
+++ b/apps/block_scout_web/test/block_scout_web/controllers/smart_contract_controller_test.exs
@@ -22,7 +22,7 @@ defmodule BlockScoutWeb.SmartContractControllerTest do
     end
 
     test "error for invalid address" do
-      path = smart_contract_path(BlockScoutWeb.Endpoint, :index, hash: "0x00", type: "regular")
+      path = smart_contract_path(BlockScoutWeb.Endpoint, :index, hash: "0x00", type: :regular)
 
       conn =
         build_conn()
@@ -49,7 +49,7 @@ defmodule BlockScoutWeb.SmartContractControllerTest do
 
       blockchain_get_function_mock()
 
-      path = smart_contract_path(BlockScoutWeb.Endpoint, :index, hash: token_contract_address.hash, type: "regular")
+      path = smart_contract_path(BlockScoutWeb.Endpoint, :index, hash: token_contract_address.hash, type: :regular)
 
       conn =
         build_conn()
@@ -65,7 +65,7 @@ defmodule BlockScoutWeb.SmartContractControllerTest do
 
       insert(:smart_contract, address_hash: token_contract_address.hash)
 
-      path = smart_contract_path(BlockScoutWeb.Endpoint, :index, hash: token_contract_address.hash, type: "proxy")
+      path = smart_contract_path(BlockScoutWeb.Endpoint, :index, hash: token_contract_address.hash, type: :proxy)
 
       conn =
         build_conn()
diff --git a/apps/explorer/lib/explorer/smart_contract/reader.ex b/apps/explorer/lib/explorer/smart_contract/reader.ex
index 9695a427d6..a0aa48ff72 100644
--- a/apps/explorer/lib/explorer/smart_contract/reader.ex
+++ b/apps/explorer/lib/explorer/smart_contract/reader.ex
@@ -221,26 +221,33 @@ defmodule Explorer.SmartContract.Reader do
   @doc """
   Fetches the blockchain value of a function that requires arguments.
   """
-  @spec query_function(String.t(), %{name: String.t(), args: nil}) :: [%{}]
-  def query_function(contract_address_hash, %{name: name, args: nil}) do
-    query_function(contract_address_hash, %{name: name, args: []})
+  @spec query_function(String.t(), %{name: String.t(), args: nil}, atom()) :: [%{}]
+  def query_function(contract_address_hash, %{name: name, args: nil}, type) do
+    query_function(contract_address_hash, %{name: name, args: []}, type)
   end
 
-  @spec query_function(Hash.t(), %{name: String.t(), args: [term()]}) :: [%{}]
-  def query_function(contract_address_hash, %{name: name, args: args}) do
+  @spec query_function(Hash.t(), %{name: String.t(), args: [term()]}, atom()) :: [%{}]
+  def query_function(contract_address_hash, %{name: name, args: args}, type) do
     abi =
       contract_address_hash
       |> Chain.address_hash_to_smart_contract()
       |> Map.get(:abi)
 
+    final_abi =
+      if type == :proxy do
+        Chain.get_implementation_abi_from_proxy(contract_address_hash, abi)
+      else
+        abi
+      end
+
     outputs =
-      case abi do
+      case final_abi do
         nil ->
           nil
 
         _ ->
           function =
-            abi
+            final_abi
             |> Enum.filter(fn function -> function["name"] == name end)
             |> List.first()
 
@@ -248,7 +255,7 @@ defmodule Explorer.SmartContract.Reader do
       end
 
     contract_address_hash
-    |> query_verified_contract(%{name => normalize_args(args)}, abi)
+    |> query_verified_contract(%{name => normalize_args(args)}, final_abi)
     |> link_outputs_and_values(outputs, name)
   end
 
diff --git a/apps/explorer/test/explorer/smart_contract/reader_test.exs b/apps/explorer/test/explorer/smart_contract/reader_test.exs
index 224a52e024..9b3e14f8c2 100644
--- a/apps/explorer/test/explorer/smart_contract/reader_test.exs
+++ b/apps/explorer/test/explorer/smart_contract/reader_test.exs
@@ -262,7 +262,7 @@ defmodule Explorer.SmartContract.ReaderTest do
     end
   end
 
-  describe "query_function/2" do
+  describe "query_function/3" do
     test "given the arguments, fetches the function value from the blockchain" do
       smart_contract = insert(:smart_contract)
 
@@ -274,7 +274,7 @@ defmodule Explorer.SmartContract.ReaderTest do
                  "type" => "uint256",
                  "value" => 0
                }
-             ] = Reader.query_function(smart_contract.address_hash, %{name: "get", args: []})
+             ] = Reader.query_function(smart_contract.address_hash, %{name: "get", args: []}, :regular)
     end
 
     test "nil arguments is treated as []" do
@@ -288,7 +288,7 @@ defmodule Explorer.SmartContract.ReaderTest do
                  "type" => "uint256",
                  "value" => 0
                }
-             ] = Reader.query_function(smart_contract.address_hash, %{name: "get", args: nil})
+             ] = Reader.query_function(smart_contract.address_hash, %{name: "get", args: nil}, :regular)
     end
   end
 

From fe78cbfe3954417a963581809aded09eb0d0908b Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Mon, 22 Jun 2020 16:14:27 +0300
Subject: [PATCH 03/34] Write contracts: a new tab with the list of write
 methods

---
 .dialyzer-ignore                              |    1 +
 CHANGELOG.md                                  |    1 +
 apps/block_scout_web/assets/css/_helpers.scss |    4 +
 .../assets/css/components/_modal.scss         |   38 +
 .../assets/css/components/_modal_status.scss  |   23 +-
 apps/block_scout_web/assets/js/lib/modals.js  |  253 +-
 .../assets/js/lib/smart_contract/functions.js |   99 +
 .../assets/js/lib/smart_contract/index.js     |    2 +-
 .../lib/smart_contract/read_only_functions.js |   54 -
 .../assets/js/lib/smart_contract/write.js     |   29 +
 .../assets/js/pages/write_contract.js         |    1 +
 apps/block_scout_web/assets/package-lock.json | 2169 +++++++++++++++--
 apps/block_scout_web/assets/package.json      |    3 +-
 apps/block_scout_web/assets/webpack.config.js |    1 +
 .../address_read_contract_controller.ex       |    1 +
 .../address_read_proxy_controller.ex          |    1 +
 .../address_write_contract_controlle.ex       |   45 +
 .../controllers/smart_contract_controller.ex  |   26 +-
 .../templates/address/_tabs.html.eex          |    7 +
 .../address_read_contract/index.html.eex      |    2 +-
 .../address_read_proxy/index.html.eex         |    2 +-
 .../address_write_contract/_metatags.html.eex |    1 +
 .../address_write_contract/index.html.eex     |   20 +
 .../common_components/_modal_status.html.eex  |   31 +-
 .../smart_contract/_functions.html.eex        |   77 +-
 .../views/address_read_contract_view.ex       |    8 +-
 .../views/address_read_proxy_view.ex          |    8 +-
 .../lib/block_scout_web/views/address_view.ex |   13 +
 .../views/address_write_contract_view.ex      |   13 +
 .../views/smart_contract_view.ex              |   17 +-
 .../lib/block_scout_web/web_router.ex         |    7 +
 apps/block_scout_web/priv/gettext/default.pot |   46 +-
 .../priv/gettext/en/LC_MESSAGES/default.po    |   46 +-
 .../smart_contract_controller_test.exs        |   16 +-
 .../lib/explorer/smart_contract/reader.ex     |    2 +-
 .../lib/explorer/smart_contract/writer.ex     |   28 +
 36 files changed, 2652 insertions(+), 443 deletions(-)
 create mode 100644 apps/block_scout_web/assets/js/lib/smart_contract/functions.js
 delete mode 100644 apps/block_scout_web/assets/js/lib/smart_contract/read_only_functions.js
 create mode 100644 apps/block_scout_web/assets/js/lib/smart_contract/write.js
 create mode 100644 apps/block_scout_web/assets/js/pages/write_contract.js
 create mode 100644 apps/block_scout_web/lib/block_scout_web/controllers/address_write_contract_controlle.ex
 create mode 100644 apps/block_scout_web/lib/block_scout_web/templates/address_write_contract/_metatags.html.eex
 create mode 100644 apps/block_scout_web/lib/block_scout_web/templates/address_write_contract/index.html.eex
 create mode 100644 apps/block_scout_web/lib/block_scout_web/views/address_write_contract_view.ex
 create mode 100644 apps/explorer/lib/explorer/smart_contract/writer.ex

diff --git a/.dialyzer-ignore b/.dialyzer-ignore
index 79833b82e3..78a619e1bf 100644
--- a/.dialyzer-ignore
+++ b/.dialyzer-ignore
@@ -1,6 +1,7 @@
 :0: Unknown function 'Elixir.ExUnit.Callbacks':'__merge__'/3
 :0: Unknown function 'Elixir.ExUnit.CaseTemplate':'__proxy__'/2
 :0: Unknown type 'Elixir.Map':t/0
+:0: Unknown type 'Elixir.Hash':t/0
 apps/ethereum_jsonrpc/lib/ethereum_jsonrpc.ex:400: Function timestamp_to_datetime/1 has no local return
 lib/explorer/repo/prometheus_logger.ex:8
 lib/block_scout_web/views/layout_view.ex:175
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 177901e0ed..d8144bbf16 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
 ## Current
 
 ### Features
+- [#3160](https://github.com/poanetwork/blockscout/pull/3160) - Write contracts feature
 - [#3157](https://github.com/poanetwork/blockscout/pull/3157) - Read methods of implementation on proxy contract
 
 ### Fixes
diff --git a/apps/block_scout_web/assets/css/_helpers.scss b/apps/block_scout_web/assets/css/_helpers.scss
index c26b5c5b22..f6e6669dda 100644
--- a/apps/block_scout_web/assets/css/_helpers.scss
+++ b/apps/block_scout_web/assets/css/_helpers.scss
@@ -29,3 +29,7 @@
   height: 0;
   visibility: hidden;
 }
+
+.hidden {
+  display: none!important;
+}
diff --git a/apps/block_scout_web/assets/css/components/_modal.scss b/apps/block_scout_web/assets/css/components/_modal.scss
index 4e70be687c..c93b41bc02 100644
--- a/apps/block_scout_web/assets/css/components/_modal.scss
+++ b/apps/block_scout_web/assets/css/components/_modal.scss
@@ -18,6 +18,10 @@
   right: -35px;
   top: -35px;
   outline: none !important;
+
+  path {
+    fill: #F6F7F9;
+  }
 }
 
 .close {
@@ -55,3 +59,37 @@
     }
   }
 }
+
+.modal-fullwidth-xs {
+  @include media-breakpoint-down(xs) {
+    padding-right: 0 !important;
+
+    .modal-dialog {
+      max-width: initial;
+      min-width: initial;
+      margin: 0.5rem 0;
+    }
+
+    .modal-content {
+      border-radius: 0;
+
+      > div {
+        border-radius: 0;
+      }
+    }
+
+    .close.close-modal {
+      right: 10px;
+      top: 5px;
+
+      path {
+        fill: #a3a9b5;
+      }
+    }
+
+    .modal-bottom-disclaimer {
+      border-bottom-left-radius: 0;
+      border-bottom-right-radius: 0;
+    }
+  }
+}
diff --git a/apps/block_scout_web/assets/css/components/_modal_status.scss b/apps/block_scout_web/assets/css/components/_modal_status.scss
index 92856250fc..87eb97c15c 100644
--- a/apps/block_scout_web/assets/css/components/_modal_status.scss
+++ b/apps/block_scout_web/assets/css/components/_modal_status.scss
@@ -15,8 +15,8 @@ $modal-status-graph-question: #329ae9 !default;
 
 .modal-status-graph {
   align-items: center;
-  border-top-left-radius: $modal-border-radius;
-  border-top-right-radius: $modal-border-radius;
+  border-top-left-radius: 8px;
+  border-top-right-radius: 8px;
   display: flex;
   height: 135px;
   justify-content: center;
@@ -66,6 +66,18 @@ $modal-status-graph-question: #329ae9 !default;
   line-height: 1.5;
   margin: 0 0 25px;
   text-align: center;
+
+  &.m-b-0 {
+    margin-bottom: 0;
+  }
+
+  .link-helptip {
+    border-bottom-width: 1px;
+    border-bottom-style: dotted;
+    color: inherit;
+    cursor: help;
+    text-decoration: none;
+  }
 }
 
 .modal-status-button-wrapper {
@@ -76,6 +88,13 @@ $modal-status-graph-question: #329ae9 !default;
   .btn-line {
     flex-grow: 1;
     margin-right: 20px;
+    border-color: $primary;
+    color: $primary;
+
+    &:hover {
+      background-color: $primary;
+      color: $additional-font;
+    }
 
     &:last-child {
       margin-right: 0;
diff --git a/apps/block_scout_web/assets/js/lib/modals.js b/apps/block_scout_web/assets/js/lib/modals.js
index e20322f6e8..c37bd295c6 100644
--- a/apps/block_scout_web/assets/js/lib/modals.js
+++ b/apps/block_scout_web/assets/js/lib/modals.js
@@ -1,75 +1,186 @@
 import $ from 'jquery'
 
-$(function () {
-  $('.js-become-candidate').on('click', function () {
-    $('#becomeCandidateModal').modal()
-  })
-
-  $('.js-validator-info-modal').on('click', function () {
-    $('#validatorInfoModal').modal()
-  })
-
-  $('.js-move-stake').on('click', function () {
-    $('#errorStatusModal').modal()
-  })
-
-  $('.js-remove-pool').on('click', function () {
-    $('#warningStatusModal').modal()
-  })
-
-  $('.js-copy-address').on('click', function () {
-    $('#successStatusModal').modal()
-  })
-
-  $('.js-stake-stake').on('click', function () {
-    const modal = '#stakeModal'
-    const progress = parseInt($(`${modal} .js-stakes-progress-data-progress`).text())
-    const total = parseInt($(`${modal} .js-stakes-progress-data-total`).text())
-
-    $(modal).modal()
-
-    setupStakesProgress(progress, total, modal)
-  })
-
-  $('.js-withdraw-stake').on('click', function () {
-    const modal = '#withdrawModal'
-    const progress = parseInt($(`${modal} .js-stakes-progress-data-progress`).text())
-    const total = parseInt($(`${modal} .js-stakes-progress-data-total`).text())
-
-    $(modal).modal()
-
-    setupStakesProgress(progress, total, modal)
-  })
-
-  function setupStakesProgress (progress, total, modal) {
-    // const stakeProgress = $(`${modal} .js-stakes-progress`)
-    // const primaryColor = $('.btn-full-primary').css('background-color')
-    // const backgroundColors = [
-    //   primaryColor,
-    //   'rgba(202, 199, 226, 0.5)'
-    // ]
-    // const progressBackground = total - progress
-
-    // // eslint-disable-next-line no-unused-vars
-    // const myChart = new window.Chart(stakeProgress, {
-    //   type: 'doughnut',
-    //   data: {
-    //     datasets: [{
-    //       data: [progress, progressBackground],
-    //       backgroundColor: backgroundColors,
-    //       hoverBackgroundColor: backgroundColors,
-    //       borderWidth: 0
-    //     }]
-    //   },
-    //   options: {
-    //     cutoutPercentage: 80,
-    //     legend: {
-    //       display: false
-    //     },
-    //     tooltips: {
-    //       enabled: false
-    //     }
-    //   }
-    // })
+let $currentModal = null
+let modalLocked = false
+
+const spinner =
+  `
+    <span class="loading-spinner-small mr-2">
+      <span class="loading-spinner-block-1"></span>
+      <span class="loading-spinner-block-2"></span>
+    </span>
+  `
+
+$(document.body).on('hide.bs.modal', e => {
+  if (modalLocked) {
+    e.preventDefault()
+    e.stopPropagation()
+    return false
   }
+
+  $currentModal = null
 })
+
+export function currentModal () {
+  return $currentModal
+}
+
+export function openModal ($modal, unclosable) {
+  // Hide all tooltips before showing a modal,
+  // since they are sticking on top of modal
+  $('.tooltip').tooltip('hide')
+
+  if (unclosable) {
+    $('.close-modal, .modal-status-button-wrapper', $modal).addClass('hidden')
+    $('.modal-status-text', $modal).addClass('m-b-0')
+  }
+
+  if ($currentModal) {
+    modalLocked = false
+
+    $currentModal
+      .one('hidden.bs.modal', () => {
+        $modal.modal('show')
+        $currentModal = $modal
+        if (unclosable) {
+          modalLocked = true
+        }
+      })
+      .modal('hide')
+  } else {
+    $modal.modal('show')
+    $currentModal = $modal
+    if (unclosable) {
+      modalLocked = true
+    }
+  }
+}
+
+export function lockModal ($modal, $submitButton = null, spinnerText = '') {
+  $modal.find('.close-modal').attr('disabled', true)
+
+  const $button = $submitButton || $modal.find('.btn-add-full')
+
+  $button
+    .attr('data-text', $button.text())
+    .attr('disabled', true)
+
+  const $span = $('span', $button)
+  const waitHtml = spinner + (spinnerText ? ` ${spinnerText}` : '')
+
+  if ($span.length) {
+    $('svg', $button).hide()
+    $span.html(waitHtml)
+  } else {
+    $button.html(waitHtml)
+  }
+
+  modalLocked = true
+}
+
+export function unlockModal ($modal, $submitButton = null) {
+  $modal.find('.close-modal').attr('disabled', false)
+
+  const $button = $submitButton || $modal.find('.btn-add-full')
+  const buttonText = $button.attr('data-text')
+
+  $button.attr('disabled', false)
+
+  const $span = $('span', $button)
+  if ($span.length) {
+    $('svg', $button).show()
+    $span.text(buttonText)
+  } else {
+    $button.text(buttonText)
+  }
+
+  modalLocked = false
+}
+
+export function openErrorModal (title, text, unclosable) {
+  const $modal = $('#errorStatusModal')
+  $modal.find('.modal-status-title').text(title)
+  $modal.find('.modal-status-text').html(text)
+  openModal($modal, unclosable)
+}
+
+export function openWarningModal (title, text) {
+  const $modal = $('#warningStatusModal')
+  $modal.find('.modal-status-title').text(title)
+  $modal.find('.modal-status-text').html(text)
+  openModal($modal)
+}
+
+export function openSuccessModal (title, text) {
+  const $modal = $('#successStatusModal')
+  $modal.find('.modal-status-title').text(title)
+  $modal.find('.modal-status-text').html(text)
+  openModal($modal)
+}
+
+export function openQuestionModal (title, text, acceptCallback = null, exceptCallback = null, acceptText = 'Yes', exceptText = 'No') {
+  const $modal = $('#questionStatusModal')
+  const $closeButton = $modal.find('.close-modal')
+
+  $closeButton.attr('disabled', false)
+
+  $modal.find('.modal-status-title').text(title)
+  $modal.find('.modal-status-text').text(text)
+
+  const $accept = $modal.find('.btn-line.accept')
+  const $except = $modal.find('.btn-line.except')
+
+  $accept
+    .removeAttr('data-dismiss')
+    .removeAttr('disabled')
+    .unbind('click')
+    .find('.btn-line-text').text(acceptText)
+
+  $except
+    .removeAttr('data-dismiss')
+    .removeAttr('disabled')
+    .unbind('click')
+    .find('.btn-line-text').text(exceptText)
+
+  if (acceptCallback) {
+    $accept.on('click', event => {
+      $closeButton.attr('disabled', true)
+
+      $accept
+        .unbind('click')
+        .attr('disabled', true)
+        .find('.btn-line-text').html(spinner)
+      $except
+        .unbind('click')
+        .removeAttr('data-dismiss')
+        .attr('disabled', true)
+
+      modalLocked = true
+      acceptCallback($modal, event)
+    })
+  } else {
+    $accept.attr('data-dismiss', 'modal')
+  }
+
+  if (exceptCallback) {
+    $except.on('click', event => {
+      $closeButton.attr('disabled', true)
+
+      $except
+        .unbind('click')
+        .attr('disabled', true)
+        .find('.btn-line-text').html(spinner)
+      $accept
+        .unbind('click')
+        .attr('disabled', true)
+        .removeAttr('data-dismiss')
+
+      modalLocked = true
+      exceptCallback($modal, event)
+    })
+  } else {
+    $except.attr('data-dismiss', 'modal')
+  }
+
+  openModal($modal)
+}
diff --git a/apps/block_scout_web/assets/js/lib/smart_contract/functions.js b/apps/block_scout_web/assets/js/lib/smart_contract/functions.js
new file mode 100644
index 0000000000..5c7b5c9127
--- /dev/null
+++ b/apps/block_scout_web/assets/js/lib/smart_contract/functions.js
@@ -0,0 +1,99 @@
+import $ from 'jquery'
+import { walletEnabled, getCurrentAccount } from './write.js'
+import { openErrorModal, openWarningModal, openSuccessModal } from '../modals.js'
+
+const loadFunctions = (element) => {
+  const $element = $(element)
+  const url = $element.data('url')
+  const hash = $element.data('hash')
+  const type = $element.data('type')
+  const action = $element.data('action')
+
+  $.get(
+    url,
+    { hash: hash, type: type, action: action },
+    response => $element.html(response)
+  )
+    .done(function () {
+      $('[data-function]').each((_, element) => {
+        readWriteFunction(element)
+      })
+    })
+    .fail(function (response) {
+      $element.html(response.statusText)
+    })
+}
+
+const readWriteFunction = (element) => {
+  const $element = $(element)
+  const $form = $element.find('[data-function-form]')
+
+  const $responseContainer = $element.find('[data-function-response]')
+
+  $form.on('submit', (event) => {
+    const action = $form.data('action')
+    event.preventDefault()
+
+    if (action === 'read') {
+      const url = $form.data('url')
+      const $functionName = $form.find('input[name=function_name]')
+      const $functionInputs = $form.find('input[name=function_input]')
+
+      const args = $.map($functionInputs, element => {
+        return $(element).val()
+      })
+
+      const data = {
+        function_name: $functionName.val(),
+        args
+      }
+
+      $.get(url, data, response => $responseContainer.html(response))
+    } else {
+      walletEnabled()
+        .then((isWalletEnabled) => {
+          if (isWalletEnabled) {
+            const functionName = $form.find('input[name=function_name]').val()
+
+            const $functionInputs = $form.find('input[name=function_input]')
+            const args = $.map($functionInputs, element => {
+              return $(element).val()
+            })
+
+            const contractAddress = $form.data('contract-address')
+            const contractAbi = $form.data('contract-abi')
+
+            getCurrentAccount()
+              .then(currentAccount => {
+                const TargetContract = new window.web3.eth.Contract(contractAbi, contractAddress)
+
+                TargetContract.methods[functionName](...args).send({ from: currentAccount })
+                  .on('error', function (error) {
+                    openErrorModal(`Error in sending transaction for method "${functionName}"`, error, false)
+                  })
+                  .on('transactionHash', function (txHash) {
+                    const getTxReceipt = (txHash) => {
+                      window.web3.eth.getTransactionReceipt(txHash)
+                        .then(txReceipt => {
+                          if (txReceipt) {
+                            openSuccessModal('Success', `Successfully sent <a href="/tx/${txHash}">transaction</a> for method "${functionName}"`)
+                            clearInterval(txReceiptPollingIntervalId)
+                          }
+                        })
+                    }
+                    const txReceiptPollingIntervalId = setInterval(() => { getTxReceipt(txHash) }, 5 * 1000)
+                  })
+              })
+          } else {
+            openWarningModal('Unauthorized', 'You haven\'t approved the reading of account list from your MetaMask/Nifty wallet or MetaMask/Nifty wallet is not installed.')
+          }
+        })
+    }
+  })
+}
+
+const container = $('[data-smart-contract-functions]')
+
+if (container.length) {
+  loadFunctions(container)
+}
diff --git a/apps/block_scout_web/assets/js/lib/smart_contract/index.js b/apps/block_scout_web/assets/js/lib/smart_contract/index.js
index 7f04bb00d6..86458b8792 100644
--- a/apps/block_scout_web/assets/js/lib/smart_contract/index.js
+++ b/apps/block_scout_web/assets/js/lib/smart_contract/index.js
@@ -1,3 +1,3 @@
-import './read_only_functions'
+import './functions'
 import './wei_ether_converter'
 import '../../app'
diff --git a/apps/block_scout_web/assets/js/lib/smart_contract/read_only_functions.js b/apps/block_scout_web/assets/js/lib/smart_contract/read_only_functions.js
deleted file mode 100644
index 43b5b171d9..0000000000
--- a/apps/block_scout_web/assets/js/lib/smart_contract/read_only_functions.js
+++ /dev/null
@@ -1,54 +0,0 @@
-import $ from 'jquery'
-
-const loadFunctions = (element) => {
-  const $element = $(element)
-  const url = $element.data('url')
-  const hash = $element.data('hash')
-  const type = $element.data('type')
-
-  $.get(
-    url,
-    { hash: hash, type: type },
-    response => $element.html(response)
-  )
-    .done(function () {
-      $('[data-function]').each((_, element) => {
-        readFunction(element)
-      })
-    })
-    .fail(function (response) {
-      $element.html(response.statusText)
-    })
-}
-
-const readFunction = (element) => {
-  const $element = $(element)
-  const $form = $element.find('[data-function-form]')
-
-  const $responseContainer = $element.find('[data-function-response]')
-
-  $form.on('submit', (event) => {
-    event.preventDefault()
-
-    const url = $form.data('url')
-    const $functionName = $form.find('input[name=function_name]')
-    const $functionInputs = $form.find('input[name=function_input]')
-
-    const args = $.map($functionInputs, element => {
-      return $(element).val()
-    })
-
-    const data = {
-      function_name: $functionName.val(),
-      args
-    }
-
-    $.get(url, data, response => $responseContainer.html(response))
-  })
-}
-
-const container = $('[data-smart-contract-functions]')
-
-if (container.length) {
-  loadFunctions(container)
-}
diff --git a/apps/block_scout_web/assets/js/lib/smart_contract/write.js b/apps/block_scout_web/assets/js/lib/smart_contract/write.js
new file mode 100644
index 0000000000..bb0c709eda
--- /dev/null
+++ b/apps/block_scout_web/assets/js/lib/smart_contract/write.js
@@ -0,0 +1,29 @@
+import Web3 from 'web3'
+
+export const walletEnabled = () => {
+  if (window.ethereum) {
+    window.web3 = new Web3(window.ethereum)
+    if (window.ethereum._state && window.ethereum._state.isUnlocked) { // Nifty Wallet
+      window.web3 = new Web3(window.web3.currentProvider)
+      return Promise.resolve(true)
+    } else if (window.ethereum._state && window.ethereum._state.isUnlocked === false) { // Nifty Wallet
+      return Promise.resolve(false)
+    } else {
+      window.ethereum.enable()
+      window.web3 = new Web3(window.web3.currentProvider)
+      return Promise.resolve(true)
+    }
+  } else if (window.web3) {
+    window.web3 = new Web3(window.web3.currentProvider)
+    return Promise.resolve(true)
+  } else {
+    return Promise.resolve(false)
+  }
+}
+
+export const getCurrentAccount = async () => {
+  const accounts = await window.web3.eth.getAccounts()
+  const account = accounts[0] ? accounts[0].toLowerCase() : null
+
+  return account
+}
diff --git a/apps/block_scout_web/assets/js/pages/write_contract.js b/apps/block_scout_web/assets/js/pages/write_contract.js
new file mode 100644
index 0000000000..e2629b977d
--- /dev/null
+++ b/apps/block_scout_web/assets/js/pages/write_contract.js
@@ -0,0 +1 @@
+import '../lib/smart_contract/write'
diff --git a/apps/block_scout_web/assets/package-lock.json b/apps/block_scout_web/assets/package-lock.json
index 3bb7d38bd1..c4ebf3ceb8 100644
--- a/apps/block_scout_web/assets/package-lock.json
+++ b/apps/block_scout_web/assets/package-lock.json
@@ -960,6 +960,162 @@
         "minimist": "^1.2.0"
       }
     },
+    "@ethersproject/abi": {
+      "version": "5.0.0-beta.153",
+      "resolved": "https://registry.npmjs.org/@ethersproject/abi/-/abi-5.0.0-beta.153.tgz",
+      "integrity": "sha512-aXweZ1Z7vMNzJdLpR1CZUAIgnwjrZeUSvN9syCwlBaEBUFJmFY+HHnfuTI5vIhVs/mRkfJVrbEyl51JZQqyjAg==",
+      "requires": {
+        "@ethersproject/address": ">=5.0.0-beta.128",
+        "@ethersproject/bignumber": ">=5.0.0-beta.130",
+        "@ethersproject/bytes": ">=5.0.0-beta.129",
+        "@ethersproject/constants": ">=5.0.0-beta.128",
+        "@ethersproject/hash": ">=5.0.0-beta.128",
+        "@ethersproject/keccak256": ">=5.0.0-beta.127",
+        "@ethersproject/logger": ">=5.0.0-beta.129",
+        "@ethersproject/properties": ">=5.0.0-beta.131",
+        "@ethersproject/strings": ">=5.0.0-beta.130"
+      }
+    },
+    "@ethersproject/address": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/@ethersproject/address/-/address-5.0.1.tgz",
+      "integrity": "sha512-kfQtXpBP2pI2TfoRRAYv8grHGiYw8U0c1KbMsC58/W33TIBy7gFSf/oAzOd94lNzdIUenKU0OuSzrHQfVcDDDA==",
+      "requires": {
+        "@ethersproject/bignumber": "^5.0.0",
+        "@ethersproject/bytes": "^5.0.0",
+        "@ethersproject/keccak256": "^5.0.0",
+        "@ethersproject/logger": "^5.0.0",
+        "@ethersproject/rlp": "^5.0.0",
+        "bn.js": "^4.4.0"
+      },
+      "dependencies": {
+        "bn.js": {
+          "version": "4.11.9",
+          "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.11.9.tgz",
+          "integrity": "sha512-E6QoYqCKZfgatHTdHzs1RRKP7ip4vvm+EyRUeE2RF0NblwVvb0p6jSVeNTOFxPn26QXN2o6SMfNxKp6kU8zQaw=="
+        }
+      }
+    },
+    "@ethersproject/bignumber": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/@ethersproject/bignumber/-/bignumber-5.0.1.tgz",
+      "integrity": "sha512-srGDO7ksT0avdDw5pBtj6F81psv5xiJMInwSSatfIKplitubFb6yVwoHGObGRd0Pp3TvrkIDfJkuskoSMj4OHQ==",
+      "requires": {
+        "@ethersproject/bytes": "^5.0.0",
+        "@ethersproject/logger": "^5.0.0",
+        "@ethersproject/properties": "^5.0.0",
+        "bn.js": "^4.4.0"
+      },
+      "dependencies": {
+        "bn.js": {
+          "version": "4.11.9",
+          "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.11.9.tgz",
+          "integrity": "sha512-E6QoYqCKZfgatHTdHzs1RRKP7ip4vvm+EyRUeE2RF0NblwVvb0p6jSVeNTOFxPn26QXN2o6SMfNxKp6kU8zQaw=="
+        }
+      }
+    },
+    "@ethersproject/bytes": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/@ethersproject/bytes/-/bytes-5.0.1.tgz",
+      "integrity": "sha512-Y198536UW9Jb9RBXuqmCsCa9mYJUsxJn+5aGr2XjNMpLBc6vEn/44GHnbQXYgRCzh4rnWtJ9bTgSwDjme9Hgnw==",
+      "requires": {
+        "@ethersproject/logger": "^5.0.0"
+      }
+    },
+    "@ethersproject/constants": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/@ethersproject/constants/-/constants-5.0.1.tgz",
+      "integrity": "sha512-Xec07hFCPN4wfC3WDiRay7KipkApl2msiKTrBHCuAwNMOM8M92+mlQp8tgfEL51DPwCZkmdk1f02kArc6caVSw==",
+      "requires": {
+        "@ethersproject/bignumber": "^5.0.0"
+      }
+    },
+    "@ethersproject/hash": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/@ethersproject/hash/-/hash-5.0.1.tgz",
+      "integrity": "sha512-1ByUXYvkszrSSks07xctBtZfpFnIVmftxWlAAnguxh6Q65vKECd/EPi5uI5xVOvnrYMH9Vb8MK1SofPX/6fArQ==",
+      "requires": {
+        "@ethersproject/bytes": "^5.0.0",
+        "@ethersproject/keccak256": "^5.0.0",
+        "@ethersproject/logger": "^5.0.0",
+        "@ethersproject/strings": "^5.0.0"
+      }
+    },
+    "@ethersproject/keccak256": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/@ethersproject/keccak256/-/keccak256-5.0.1.tgz",
+      "integrity": "sha512-AtFm/4qHRQUvZcG3WYmaT7zV79dz72+N01w0XphcIBaD/7UZXyW85Uf08sirVlckHmh9fvc4UDWyHiroKsBT6Q==",
+      "requires": {
+        "@ethersproject/bytes": "^5.0.0",
+        "js-sha3": "0.5.7"
+      },
+      "dependencies": {
+        "js-sha3": {
+          "version": "0.5.7",
+          "resolved": "https://registry.npmjs.org/js-sha3/-/js-sha3-0.5.7.tgz",
+          "integrity": "sha1-DU/9gALVMzqrr0oj7tL2N0yfKOc="
+        }
+      }
+    },
+    "@ethersproject/logger": {
+      "version": "5.0.2",
+      "resolved": "https://registry.npmjs.org/@ethersproject/logger/-/logger-5.0.2.tgz",
+      "integrity": "sha512-NQe3O1/Nwkcp6bto6hsTvrcCeR/cOGK+RhOMn0Zi2FND6gdWsf1g+5ie8gQ1REqDX4MTGP/Y131dZas985ls/g=="
+    },
+    "@ethersproject/properties": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/@ethersproject/properties/-/properties-5.0.1.tgz",
+      "integrity": "sha512-b3VZ/NpYIf64/hFXeWNxVCbY1xoMPIYM3n6Qnu6Ayr3bLt1olFPQfAaaRB0aOsLz7tMtmkT3DrA1KG/IrOgBRw==",
+      "requires": {
+        "@ethersproject/logger": "^5.0.0"
+      }
+    },
+    "@ethersproject/rlp": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/@ethersproject/rlp/-/rlp-5.0.1.tgz",
+      "integrity": "sha512-3F8XE1zS4w8w4xiK1hMtFuVs6UnhQlmrEHLT85GanqK8vG5wGi81IQmkukL9tQIu2a5jykoO46ibja+6N1fpFg==",
+      "requires": {
+        "@ethersproject/bytes": "^5.0.0",
+        "@ethersproject/logger": "^5.0.0"
+      }
+    },
+    "@ethersproject/signing-key": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/@ethersproject/signing-key/-/signing-key-5.0.1.tgz",
+      "integrity": "sha512-Z3yMPFFf4KkWltndDNi/tpese7qZh6ZWKbGu3DHd8xOX0PJqbScdAs6gCfFeMatO06qyX307Y52soc/Ayf8ZSg==",
+      "requires": {
+        "@ethersproject/bytes": "^5.0.0",
+        "@ethersproject/logger": "^5.0.0",
+        "@ethersproject/properties": "^5.0.0",
+        "elliptic": "6.5.2"
+      }
+    },
+    "@ethersproject/strings": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/@ethersproject/strings/-/strings-5.0.1.tgz",
+      "integrity": "sha512-N8LxdHGBT7GZdogkEOV5xKXYTz5PNHuNzcxLNPYfH3kpvWSyXshZBgAz8YE1a8sMZagGj+Ic6d3mHijdCTSkGA==",
+      "requires": {
+        "@ethersproject/bytes": "^5.0.0",
+        "@ethersproject/constants": "^5.0.0",
+        "@ethersproject/logger": "^5.0.0"
+      }
+    },
+    "@ethersproject/transactions": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/@ethersproject/transactions/-/transactions-5.0.1.tgz",
+      "integrity": "sha512-IGc6/5hri3PrqR/ZCj89osDiq3Lt0CSrycn6vlRl8SjpBKYDdcT+Ru5xkeC7YcsnqcdBmTL+jyR3SLudU+x2Kw==",
+      "requires": {
+        "@ethersproject/address": "^5.0.0",
+        "@ethersproject/bignumber": "^5.0.0",
+        "@ethersproject/bytes": "^5.0.0",
+        "@ethersproject/constants": "^5.0.0",
+        "@ethersproject/keccak256": "^5.0.0",
+        "@ethersproject/logger": "^5.0.0",
+        "@ethersproject/properties": "^5.0.0",
+        "@ethersproject/rlp": "^5.0.0",
+        "@ethersproject/signing-key": "^5.0.0"
+      }
+    },
     "@fortawesome/fontawesome-free": {
       "version": "5.1.0-4",
       "resolved": "https://registry.npmjs.org/@fortawesome/fontawesome-free/-/fontawesome-free-5.1.0-4.tgz",
@@ -1521,6 +1677,11 @@
         }
       }
     },
+    "@sindresorhus/is": {
+      "version": "0.14.0",
+      "resolved": "https://registry.npmjs.org/@sindresorhus/is/-/is-0.14.0.tgz",
+      "integrity": "sha512-9NET910DNaIPngYnLLPeg+Ogzqsi9uM4mSboU5y6p8S5DzMTVEsJZrawi+BoDNUVBa2DhJqQYUFvMDfgU062LQ=="
+    },
     "@sinonjs/commons": {
       "version": "1.7.2",
       "resolved": "https://registry.npmjs.org/@sinonjs/commons/-/commons-1.7.2.tgz",
@@ -1530,6 +1691,14 @@
         "type-detect": "4.0.8"
       }
     },
+    "@szmarczak/http-timer": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/@szmarczak/http-timer/-/http-timer-1.1.2.tgz",
+      "integrity": "sha512-XIB2XbzHTN6ieIjfIMV9hlVcfPU26s2vafYWQcZHWXHOxiaRZYEDKEwdl129Zyg50+foYV2jCgtrqSA6qNuNSA==",
+      "requires": {
+        "defer-to-connect": "^1.0.1"
+      }
+    },
     "@types/babel__core": {
       "version": "7.1.7",
       "resolved": "https://registry.npmjs.org/@types/babel__core/-/babel__core-7.1.7.tgz",
@@ -1571,6 +1740,14 @@
         "@babel/types": "^7.3.0"
       }
     },
+    "@types/bn.js": {
+      "version": "4.11.6",
+      "resolved": "https://registry.npmjs.org/@types/bn.js/-/bn.js-4.11.6.tgz",
+      "integrity": "sha512-pqr857jrp2kPuO9uRjZ3PwnJTjoQy+fcdxvBTvHm6dkmEL9q+hDD/2j/0ELOBPtPnS8LjCX0gI9nbl8lVkadpg==",
+      "requires": {
+        "@types/node": "*"
+      }
+    },
     "@types/color-name": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/@types/color-name/-/color-name-1.1.1.tgz",
@@ -1614,8 +1791,7 @@
     "@types/node": {
       "version": "13.13.5",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-13.13.5.tgz",
-      "integrity": "sha512-3ySmiBYJPqgjiHA7oEaIo2Rzz0HrOZ7yrNO5HWyaE5q0lQ3BppDZ3N53Miz8bw2I7gh1/zir2MGVZBvpb1zq9g==",
-      "dev": true
+      "integrity": "sha512-3ySmiBYJPqgjiHA7oEaIo2Rzz0HrOZ7yrNO5HWyaE5q0lQ3BppDZ3N53Miz8bw2I7gh1/zir2MGVZBvpb1zq9g=="
     },
     "@types/normalize-package-data": {
       "version": "2.4.0",
@@ -1855,6 +2031,15 @@
       "integrity": "sha512-nne9/IiQ/hzIhY6pdDnbBtz7DjPTKrY00P/zvPSm5pOFkl6xuGrGnXn/VtTNNfNtAfZ9/1RtehkszU9qcTii0Q==",
       "dev": true
     },
+    "accepts": {
+      "version": "1.3.7",
+      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.7.tgz",
+      "integrity": "sha512-Il80Qs2WjYlJIBNzNkK6KYqlVMTbZLXgHx2oT0pU/fjRHyEp+PEfEPY0R3WCwAGVOtauxh1hOxNgIf5bv7dQpA==",
+      "requires": {
+        "mime-types": "~2.1.24",
+        "negotiator": "0.6.2"
+      }
+    },
     "acorn": {
       "version": "7.1.1",
       "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.1.1.tgz",
@@ -1913,7 +2098,6 @@
       "version": "6.12.2",
       "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.2.tgz",
       "integrity": "sha512-k+V+hzjm5q/Mr8ef/1Y9goCmlsK4I6Sm74teeyGvFk1XrOsbsKLjEdrvny42CZ+a8sXbk8KWpY/bDwS+FLL2UQ==",
-      "dev": true,
       "requires": {
         "fast-deep-equal": "^3.1.1",
         "fast-json-stable-stringify": "^2.0.0",
@@ -2048,6 +2232,11 @@
       "integrity": "sha1-3wEKoSh+Fku9pvlyOwqWoexBh6E=",
       "dev": true
     },
+    "array-flatten": {
+      "version": "1.1.1",
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-      "integrity": "sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ==",
-      "dev": true
+      "integrity": "sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ=="
     },
     "y18n": {
       "version": "4.0.0",
@@ -14020,11 +15777,15 @@
       "integrity": "sha512-r9S/ZyXu/Xu9q1tYlpsLIsa3EeLXXk0VwlxqTcFRfg9EhMW+17kbt9G0NrgCmhGb5vT2hyhJZLfDGx+7+5Uj/w==",
       "dev": true
     },
+    "yaeti": {
+      "version": "0.0.6",
+      "resolved": "https://registry.npmjs.org/yaeti/-/yaeti-0.0.6.tgz",
+      "integrity": "sha1-8m9ITXJoTPQr7ft2lwqhYI+/lXc="
+    },
     "yallist": {
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.1.1.tgz",
-      "integrity": "sha512-a4UGQaWPH59mOXUYnAG2ewncQS4i4F43Tv3JoAM+s2VDAmS9NsK8GpDMLrCHPksFT7h3K6TOoUNn2pb7RoXx4g==",
-      "dev": true
+      "integrity": "sha512-a4UGQaWPH59mOXUYnAG2ewncQS4i4F43Tv3JoAM+s2VDAmS9NsK8GpDMLrCHPksFT7h3K6TOoUNn2pb7RoXx4g=="
     },
     "yargs": {
       "version": "15.3.1",
diff --git a/apps/block_scout_web/assets/package.json b/apps/block_scout_web/assets/package.json
index 1546450e1c..b5692f344c 100644
--- a/apps/block_scout_web/assets/package.json
+++ b/apps/block_scout_web/assets/package.json
@@ -39,7 +39,8 @@
     "popper.js": "^1.14.7",
     "reduce-reducers": "^0.4.3",
     "redux": "^4.0.5",
-    "urijs": "^1.19.2"
+    "urijs": "^1.19.2",
+    "web3": "^1.2.9"
   },
   "devDependencies": {
     "@babel/core": "^7.7.2",
diff --git a/apps/block_scout_web/assets/webpack.config.js b/apps/block_scout_web/assets/webpack.config.js
index dc18250b67..bda47b2c7b 100644
--- a/apps/block_scout_web/assets/webpack.config.js
+++ b/apps/block_scout_web/assets/webpack.config.js
@@ -90,6 +90,7 @@ const appJs =
       'admin-tasks': './js/pages/admin/tasks.js',
       'read-token-contract': './js/pages/read_token_contract.js',
       'smart-contract-helpers': './js/lib/smart_contract/index.js',
+      'write_contract': './js/pages/write_contract.js',
       'token-transfers-toggle': './js/lib/token_transfers_toggle.js',
       'try-api': './js/lib/try_api.js',
       'try-eth-api': './js/lib/try_eth_api.js',
diff --git a/apps/block_scout_web/lib/block_scout_web/controllers/address_read_contract_controller.ex b/apps/block_scout_web/lib/block_scout_web/controllers/address_read_contract_controller.ex
index 2be5e2995a..4523fbb068 100644
--- a/apps/block_scout_web/lib/block_scout_web/controllers/address_read_contract_controller.ex
+++ b/apps/block_scout_web/lib/block_scout_web/controllers/address_read_contract_controller.ex
@@ -32,6 +32,7 @@ defmodule BlockScoutWeb.AddressReadContractController do
         "index.html",
         address: address,
         type: :regular,
+        action: :read,
         coin_balance_status: CoinBalanceOnDemand.trigger_fetch(address),
         exchange_rate: Market.get_exchange_rate(Explorer.coin()) || Token.null(),
         counters_path: address_path(conn, :address_counters, %{"id" => Address.checksum(address_hash)})
diff --git a/apps/block_scout_web/lib/block_scout_web/controllers/address_read_proxy_controller.ex b/apps/block_scout_web/lib/block_scout_web/controllers/address_read_proxy_controller.ex
index 1d0ed7aeae..2429a8a04e 100644
--- a/apps/block_scout_web/lib/block_scout_web/controllers/address_read_proxy_controller.ex
+++ b/apps/block_scout_web/lib/block_scout_web/controllers/address_read_proxy_controller.ex
@@ -26,6 +26,7 @@ defmodule BlockScoutWeb.AddressReadProxyController do
         "index.html",
         address: address,
         type: :proxy,
+        action: :read,
         coin_balance_status: CoinBalanceOnDemand.trigger_fetch(address),
         exchange_rate: Market.get_exchange_rate(Explorer.coin()) || Token.null(),
         counters_path: address_path(conn, :address_counters, %{"id" => Address.checksum(address_hash)})
diff --git a/apps/block_scout_web/lib/block_scout_web/controllers/address_write_contract_controlle.ex b/apps/block_scout_web/lib/block_scout_web/controllers/address_write_contract_controlle.ex
new file mode 100644
index 0000000000..c066914f46
--- /dev/null
+++ b/apps/block_scout_web/lib/block_scout_web/controllers/address_write_contract_controlle.ex
@@ -0,0 +1,45 @@
+# credo:disable-for-this-file
+#
+# When moving the calls to ajax, this controller became very similar to the
+# `address_contract_controller`, but both are necessary until we are able to
+# address a better way to organize the controllers.
+#
+# So, for now, I'm adding this comment to disable the credo check for this file.
+defmodule BlockScoutWeb.AddressWriteContractController do
+  use BlockScoutWeb, :controller
+
+  alias Explorer.{Chain, Market}
+  alias Explorer.Chain.Address
+  alias Explorer.ExchangeRates.Token
+  alias Indexer.Fetcher.CoinBalanceOnDemand
+
+  def index(conn, %{"address_id" => address_hash_string}) do
+    address_options = [
+      necessity_by_association: %{
+        :contracts_creation_internal_transaction => :optional,
+        :names => :optional,
+        :smart_contract => :optional,
+        :token => :optional,
+        :contracts_creation_transaction => :optional
+      }
+    ]
+
+    with {:ok, address_hash} <- Chain.string_to_address_hash(address_hash_string),
+         {:ok, address} <- Chain.find_contract_address(address_hash, address_options, true),
+         false <- is_nil(address.smart_contract) do
+      render(
+        conn,
+        "index.html",
+        address: address,
+        type: :regular,
+        action: :write,
+        coin_balance_status: CoinBalanceOnDemand.trigger_fetch(address),
+        exchange_rate: Market.get_exchange_rate(Explorer.coin()) || Token.null(),
+        counters_path: address_path(conn, :address_counters, %{"id" => Address.checksum(address_hash)})
+      )
+    else
+      _ ->
+        not_found(conn)
+    end
+  end
+end
diff --git a/apps/block_scout_web/lib/block_scout_web/controllers/smart_contract_controller.ex b/apps/block_scout_web/lib/block_scout_web/controllers/smart_contract_controller.ex
index 32d29964f5..ccfd6c165b 100644
--- a/apps/block_scout_web/lib/block_scout_web/controllers/smart_contract_controller.ex
+++ b/apps/block_scout_web/lib/block_scout_web/controllers/smart_contract_controller.ex
@@ -2,17 +2,27 @@ defmodule BlockScoutWeb.SmartContractController do
   use BlockScoutWeb, :controller
 
   alias Explorer.Chain
-  alias Explorer.SmartContract.Reader
+  alias Explorer.SmartContract.{Reader, Writer}
+
+  def index(conn, %{"hash" => address_hash_string, "type" => contract_type, "action" => action}) do
+    address_options = [
+      necessity_by_association: %{
+        :smart_contract => :optional
+      }
+    ]
 
-  def index(conn, %{"hash" => address_hash_string, "type" => contract_type}) do
     with true <- ajax?(conn),
          {:ok, address_hash} <- Chain.string_to_address_hash(address_hash_string),
-         {:ok, address} <- Chain.find_contract_address(address_hash) do
-      read_only_functions =
-        if contract_type == "proxy" do
-          Reader.read_only_functions_proxy(address_hash)
+         {:ok, address} <- Chain.find_contract_address(address_hash, address_options, true) do
+      functions =
+        if action == "write" do
+          Writer.write_functions(address_hash)
         else
-          Reader.read_only_functions(address_hash)
+          if contract_type == "proxy" do
+            Reader.read_only_functions_proxy(address_hash)
+          else
+            Reader.read_only_functions(address_hash)
+          end
         end
 
       conn
@@ -20,7 +30,7 @@ defmodule BlockScoutWeb.SmartContractController do
       |> put_layout(false)
       |> render(
         "_functions.html",
-        read_only_functions: read_only_functions,
+        read_only_functions: functions,
         address: address
       )
     else
diff --git a/apps/block_scout_web/lib/block_scout_web/templates/address/_tabs.html.eex b/apps/block_scout_web/lib/block_scout_web/templates/address/_tabs.html.eex
index e872bf91e1..d6345ad84d 100644
--- a/apps/block_scout_web/lib/block_scout_web/templates/address/_tabs.html.eex
+++ b/apps/block_scout_web/lib/block_scout_web/templates/address/_tabs.html.eex
@@ -71,4 +71,11 @@
         class: "card-tab #{tab_status("read_proxy", @conn.request_path)}")
         %>
   <% end %>
+  <%= if smart_contract_with_write_functions?(@address) do %>
+    <%= link(
+        gettext("Write Contract"),
+        to: address_write_contract_path(@conn, :index, @address.hash),
+        class: "card-tab #{tab_status("write_contract", @conn.request_path)}")
+        %>
+  <% end %>
 </div>
diff --git a/apps/block_scout_web/lib/block_scout_web/templates/address_read_contract/index.html.eex b/apps/block_scout_web/lib/block_scout_web/templates/address_read_contract/index.html.eex
index 1ad7f03c7a..9181602ffe 100644
--- a/apps/block_scout_web/lib/block_scout_web/templates/address_read_contract/index.html.eex
+++ b/apps/block_scout_web/lib/block_scout_web/templates/address_read_contract/index.html.eex
@@ -5,7 +5,7 @@
   <div class="card">
     <%= render BlockScoutWeb.AddressView, "_tabs.html", assigns %>
     <!-- loaded via AJAX -->
-    <div class="card-body" data-smart-contract-functions data-hash="<%= to_string(@address.hash) %>" data-type="<%= @type %>" data-url="<%= smart_contract_path(@conn, :index) %>">
+    <div class="card-body" data-smart-contract-functions data-hash="<%= to_string(@address.hash) %>" data-type="<%= @type %>" data-action="<%= @action %>" data-url="<%= smart_contract_path(@conn, :index) %>">
       <div>
         <span class="loading-spinner-small mr-2">
           <span class="loading-spinner-block-1"></span>
diff --git a/apps/block_scout_web/lib/block_scout_web/templates/address_read_proxy/index.html.eex b/apps/block_scout_web/lib/block_scout_web/templates/address_read_proxy/index.html.eex
index 1ad7f03c7a..9181602ffe 100644
--- a/apps/block_scout_web/lib/block_scout_web/templates/address_read_proxy/index.html.eex
+++ b/apps/block_scout_web/lib/block_scout_web/templates/address_read_proxy/index.html.eex
@@ -5,7 +5,7 @@
   <div class="card">
     <%= render BlockScoutWeb.AddressView, "_tabs.html", assigns %>
     <!-- loaded via AJAX -->
-    <div class="card-body" data-smart-contract-functions data-hash="<%= to_string(@address.hash) %>" data-type="<%= @type %>" data-url="<%= smart_contract_path(@conn, :index) %>">
+    <div class="card-body" data-smart-contract-functions data-hash="<%= to_string(@address.hash) %>" data-type="<%= @type %>" data-action="<%= @action %>" data-url="<%= smart_contract_path(@conn, :index) %>">
       <div>
         <span class="loading-spinner-small mr-2">
           <span class="loading-spinner-block-1"></span>
diff --git a/apps/block_scout_web/lib/block_scout_web/templates/address_write_contract/_metatags.html.eex b/apps/block_scout_web/lib/block_scout_web/templates/address_write_contract/_metatags.html.eex
new file mode 100644
index 0000000000..3ef2a67ca2
--- /dev/null
+++ b/apps/block_scout_web/lib/block_scout_web/templates/address_write_contract/_metatags.html.eex
@@ -0,0 +1 @@
+<%= render BlockScoutWeb.AddressView, "_metatags.html", conn: @conn, address: @address %>
diff --git a/apps/block_scout_web/lib/block_scout_web/templates/address_write_contract/index.html.eex b/apps/block_scout_web/lib/block_scout_web/templates/address_write_contract/index.html.eex
new file mode 100644
index 0000000000..34c5dcffcf
--- /dev/null
+++ b/apps/block_scout_web/lib/block_scout_web/templates/address_write_contract/index.html.eex
@@ -0,0 +1,20 @@
+<section class="container">
+
+  <%= render BlockScoutWeb.AddressView, "overview.html", assigns %>
+
+  <div class="card">
+    <%= render BlockScoutWeb.AddressView, "_tabs.html", assigns %>
+    <!-- loaded via AJAX -->
+    <div class="card-body" data-smart-contract-functions data-hash="<%= to_string(@address.hash) %>" data-type="<%= @type %>" data-action="<%= @action %>" data-url="<%= smart_contract_path(@conn, :index) %>">
+      <div>
+        <span class="loading-spinner-small mr-2">
+          <span class="loading-spinner-block-1"></span>
+          <span class="loading-spinner-block-2"></span>
+        </span>
+        <%= gettext("Loading...") %>
+      </div>
+    </div>
+  </div>
+  <script defer data-cfasync="false" src="<%= static_path(@conn, "/js/smart-contract-helpers.js") %>"></script>
+  <script defer data-cfasync="false" src="<%= static_path(@conn, "/js/write_contract.js") %>"></script>
+</section>
diff --git a/apps/block_scout_web/lib/block_scout_web/templates/common_components/_modal_status.html.eex b/apps/block_scout_web/lib/block_scout_web/templates/common_components/_modal_status.html.eex
index f6328b8f1b..4a1bb520d4 100644
--- a/apps/block_scout_web/lib/block_scout_web/templates/common_components/_modal_status.html.eex
+++ b/apps/block_scout_web/lib/block_scout_web/templates/common_components/_modal_status.html.eex
@@ -3,44 +3,25 @@
     <div class="modal-content">
       <div class="modal-status-graph modal-status-graph-<%= if assigns[:status] do @status end %>">
         <%=
-          if @status == "error" do
-            render BlockScoutWeb.CommonComponentsView, "_icon_error_modal.html"
-          end
-        %>
-        <%=
-          if @status == "success" do
-            render BlockScoutWeb.CommonComponentsView, "_icon_success_modal.html"
-          end
-        %>
-        <%=
-          if @status == "warning" do
-            render BlockScoutWeb.CommonComponentsView, "_icon_warning_modal.html"
-          end
-        %>
-        <%=
-          if @status == "question" do
-            render BlockScoutWeb.CommonComponentsView, "_icon_question_modal.html"
+          if @status in ["error", "success", "warning", "question"] do
+            render BlockScoutWeb.CommonComponentsView, "_icon_#{@status}_modal.html"
           end
         %>
       </div>
       <%= render BlockScoutWeb.CommonComponentsView, "_modal_close_button.html" %>
       <div class="modal-body modal-status-body">
-        <%= if assigns[:title] do %>
-        <h2 class="modal-status-title"><%= @title %></h2>
-        <% end %>
-        <%= if assigns[:text] do %>
-        <p class="modal-status-text"><%= @text %></p>
-        <% end %>
+        <h2 class="modal-status-title"><%= if assigns[:title] do @title end %></h2>
+        <p class="modal-status-text"><%= if assigns[:text] do @text end %></p>
         <div class="modal-status-button-wrapper">
           <%= if @status !== "question" do %>
             <button class="btn-line" type="button" data-dismiss="modal">
               <span class="btn-line-text">Ok</span>
             </button>
           <% else %>
-            <button class="btn-line except" type="button" data-dismiss="modal">
+            <button class="btn-line except" type="button">
               <span class="btn-line-text">No</span>
             </button>
-            <button class="btn-line accept" type="button" data-dismiss="modal">
+            <button class="btn-line accept" type="button">
               <span class="btn-line-text">Yes</span>
             </button>
           <% end %>
diff --git a/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex b/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex
index a0552d5720..f5232c6e36 100644
--- a/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex
+++ b/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex
@@ -3,56 +3,73 @@
     <div class="py-2 pr-2 text-nowrap">
       <%= counter %>.
 
-      <%= function["name"] %>
+      <%= function["name"] || (if fallback?(function), do: "fallback", else: "") %>
 
       &#8594;
     </div>
 
-    <%= if queryable?(function["inputs"]) do %>
+    <%= if queryable?(function["inputs"]) || writeable?(function) do %>
       <div style="width: 100%; overflow: hidden;">
-        <form class="form-inline" data-function-form data-url="<%= smart_contract_path(@conn, :show, @address.hash) %>">
+        <%=
+          for status <- ["error", "warning", "success", "question"] do
+            render BlockScoutWeb.CommonComponentsView, "_modal_status.html", status: status
+          end
+        %>
+        <form class="form-inline" data-function-form data-action="<%= if writeable?(function), do: :write, else: :read %>" data-url="<%= smart_contract_path(@conn, :show, @address.hash) %>" data-contract-address="<%= @address.hash %>" data-contract-abi="<%= Poison.encode!(@address.smart_contract.abi) %>">
           <input type="hidden" name="function_name" value='<%= function["name"] %>' />
 
-          <%= for input <- function["inputs"] do %>
+          <%= if queryable?(function["inputs"]) do %>
+            <%= for input <- function["inputs"] do %>
+              <div class="form-group pr-2">
+                <input type="text" name="function_input" class="form-control form-control-sm address-input-sm mt-2" placeholder='<%= input["name"] %>(<%= input["type"] %>)'  />
+              </div>
+            <% end %>
+          <% end %>
+
+          <%= if payable?(function) do %>
             <div class="form-group pr-2">
-              <input type="text" name="function_input" class="form-control form-control-sm address-input-sm mt-2" placeholder='<%= input["name"] %>(<%= input["type"] %>)'  />
+              <input type="text" name="function_input" class="form-control form-control-sm address-input-sm mt-2" placeholder='value(<%= gettext("ETH")%>)'  />
             </div>
           <% end %>
 
           <input type="submit" value='<%= gettext("Query")%>' class="button btn-line button-xs py-0 mt-2" style="padding: 6px 8px!important;height: 26px;font-size: 11px;" />
         </form>
 
-        <div class='p-2 text-muted <%= if (queryable?(function["inputs"]) == true), do: "w-100" %>'>
-          <%= if (queryable?(function["inputs"])), do: raw "&#8627;" %>
+        <%= if outputs?(function["outputs"]) do %>
+          <div class='p-2 text-muted <%= if (queryable?(function["inputs"]) == true), do: "w-100" %>'>
+            <%= if (queryable?(function["inputs"])), do: raw "&#8627;" %>
 
-          <%= for output <- function["outputs"] do %>
-            <%= output["type"] %>
-          <% end %>
-        </div>
+            <%= for output <- function["outputs"] do %>
+              <%= output["type"] %>
+            <% end %>
+          </div>
+        <% end %>
 
         <div data-function-response></div>
       </div>
     <% else %>
       <span class="py-2">
-        <%= for output <- function["outputs"] do %>
-          <%= if address?(output["type"]) do %>
-            <%= link(
-               output["value"],
-               to: address_path(@conn, :show, output["value"])
-             ) %>
-          <% else %>
-              <%= if output["type"] == "uint256" do %>
-                <div data-wei-ether-converter>
-                  <span data-conversion-unit><%= output["value"] %></span>
-                  <span class="py-2 px-2">
-                    <input class="wei-ether" type="checkbox" autocomplete="off">
-                    <span class="d-inline-block" data-conversion-text-wei><%= gettext("WEI")%></span>
-                    <span class="d-none" data-conversion-text-eth><%= gettext("ETH")%></span>
-                  </span>
-                </div>
-              <% else %>
-                <%= values(output["value"], output["type"]) %>
-              <% end %>
+        <%= if outputs?(function["outputs"]) do %>
+          <%= for output <- function["outputs"] do %>
+            <%= if address?(output["type"]) do %>
+              <%= link(
+                output["value"],
+                to: address_path(@conn, :show, output["value"])
+              ) %>
+            <% else %>
+                <%= if output["type"] == "uint256" do %>
+                  <div data-wei-ether-converter>
+                    <span data-conversion-unit><%= output["value"] %></span>
+                    <span class="py-2 px-2">
+                      <input class="wei-ether" type="checkbox" autocomplete="off">
+                      <span class="d-inline-block" data-conversion-text-wei><%= gettext("WEI")%></span>
+                      <span class="d-none" data-conversion-text-eth><%= gettext("ETH")%></span>
+                    </span>
+                  </div>
+                <% else %>
+                  <%= values(output["value"], output["type"]) %>
+                <% end %>
+            <% end %>
           <% end %>
         <% end %>
       </span>
diff --git a/apps/block_scout_web/lib/block_scout_web/views/address_read_contract_view.ex b/apps/block_scout_web/lib/block_scout_web/views/address_read_contract_view.ex
index 58cdff8db8..1930c4b8d7 100644
--- a/apps/block_scout_web/lib/block_scout_web/views/address_read_contract_view.ex
+++ b/apps/block_scout_web/lib/block_scout_web/views/address_read_contract_view.ex
@@ -1,7 +1,13 @@
 defmodule BlockScoutWeb.AddressReadContractView do
   use BlockScoutWeb, :view
 
-  def queryable?(inputs), do: Enum.any?(inputs)
+  def queryable?(inputs) when not is_nil(inputs), do: Enum.any?(inputs)
+
+  def queryable?(inputs) when is_nil(inputs), do: false
+
+  def outputs?(outputs) when not is_nil(outputs), do: Enum.any?(outputs)
+
+  def outputs?(outputs) when is_nil(outputs), do: false
 
   def address?(type), do: type == "address"
 end
diff --git a/apps/block_scout_web/lib/block_scout_web/views/address_read_proxy_view.ex b/apps/block_scout_web/lib/block_scout_web/views/address_read_proxy_view.ex
index 0a36b3fc25..178e900fe0 100644
--- a/apps/block_scout_web/lib/block_scout_web/views/address_read_proxy_view.ex
+++ b/apps/block_scout_web/lib/block_scout_web/views/address_read_proxy_view.ex
@@ -1,7 +1,13 @@
 defmodule BlockScoutWeb.AddressReadProxyView do
   use BlockScoutWeb, :view
 
-  def queryable?(inputs), do: Enum.any?(inputs)
+  def queryable?(inputs) when not is_nil(inputs), do: Enum.any?(inputs)
+
+  def queryable?(inputs) when is_nil(inputs), do: false
+
+  def outputs?(outputs) when not is_nil(outputs), do: Enum.any?(outputs)
+
+  def outputs?(outputs) when is_nil(outputs), do: false
 
   def address?(type), do: type == "address"
 end
diff --git a/apps/block_scout_web/lib/block_scout_web/views/address_view.ex b/apps/block_scout_web/lib/block_scout_web/views/address_view.ex
index dd21d5b080..36814cfec4 100644
--- a/apps/block_scout_web/lib/block_scout_web/views/address_view.ex
+++ b/apps/block_scout_web/lib/block_scout_web/views/address_view.ex
@@ -19,6 +19,7 @@ defmodule BlockScoutWeb.AddressView do
     "token_transfers",
     "read_contract",
     "read_proxy",
+    "write_contract",
     "tokens",
     "transactions",
     "validations"
@@ -235,6 +236,17 @@ defmodule BlockScoutWeb.AddressView do
 
   def smart_contract_is_proxy?(%Address{smart_contract: nil}), do: false
 
+  def smart_contract_with_write_functions?(%Address{smart_contract: %SmartContract{}} = address) do
+    Enum.any?(
+      address.smart_contract.abi,
+      &(&1["type"] !== "event" &&
+          (&1["stateMutability"] == "nonpayable" || &1["stateMutability"] == "payable" || &1["payable"] ||
+             (!&1["payable"] && !&1["constant"] && !&1["stateMutability"])))
+    )
+  end
+
+  def smart_contract_with_write_functions?(%Address{smart_contract: nil}), do: false
+
   def has_decompiled_code?(address) do
     address.has_decompiled_code? ||
       (Ecto.assoc_loaded?(address.decompiled_smart_contracts) && Enum.count(address.decompiled_smart_contracts) > 0)
@@ -334,6 +346,7 @@ defmodule BlockScoutWeb.AddressView do
   defp tab_name(["decompiled_contracts"]), do: gettext("Decompiled Code")
   defp tab_name(["read_contract"]), do: gettext("Read Contract")
   defp tab_name(["read_proxy"]), do: gettext("Read Proxy")
+  defp tab_name(["write_contract"]), do: gettext("Write Contract")
   defp tab_name(["coin_balances"]), do: gettext("Coin Balance History")
   defp tab_name(["validations"]), do: gettext("Blocks Validated")
   defp tab_name(["logs"]), do: gettext("Logs")
diff --git a/apps/block_scout_web/lib/block_scout_web/views/address_write_contract_view.ex b/apps/block_scout_web/lib/block_scout_web/views/address_write_contract_view.ex
new file mode 100644
index 0000000000..37b82f72cc
--- /dev/null
+++ b/apps/block_scout_web/lib/block_scout_web/views/address_write_contract_view.ex
@@ -0,0 +1,13 @@
+defmodule BlockScoutWeb.AddressWriteContractView do
+  use BlockScoutWeb, :view
+
+  def queryable?(inputs) when not is_nil(inputs), do: Enum.any?(inputs)
+
+  def queryable?(inputs) when is_nil(inputs), do: false
+
+  def outputs?(outputs) when not is_nil(outputs), do: Enum.any?(outputs)
+
+  def outputs?(outputs) when is_nil(outputs), do: false
+
+  def address?(type), do: type == "address"
+end
diff --git a/apps/block_scout_web/lib/block_scout_web/views/smart_contract_view.ex b/apps/block_scout_web/lib/block_scout_web/views/smart_contract_view.ex
index fef4fbc9d2..1cde5f4df3 100644
--- a/apps/block_scout_web/lib/block_scout_web/views/smart_contract_view.ex
+++ b/apps/block_scout_web/lib/block_scout_web/views/smart_contract_view.ex
@@ -1,7 +1,22 @@
 defmodule BlockScoutWeb.SmartContractView do
   use BlockScoutWeb, :view
 
-  def queryable?(inputs), do: Enum.any?(inputs)
+  def queryable?(inputs) when not is_nil(inputs), do: Enum.any?(inputs)
+
+  def queryable?(inputs) when is_nil(inputs), do: false
+
+  def writeable?(function),
+    do: payable?(function) || nonpayable?(function) || fallback?(function) || function["constant"] == false
+
+  def outputs?(outputs) when not is_nil(outputs), do: Enum.any?(outputs)
+
+  def outputs?(outputs) when is_nil(outputs), do: false
+
+  def fallback?(function), do: function["type"] == "fallback"
+
+  def payable?(function), do: function["stateMutability"] == "payable" || function["payable"]
+
+  def nonpayable?(function), do: function["stateMutability"] == "nonpayable"
 
   def address?(type), do: type in ["address", "address payable"]
 
diff --git a/apps/block_scout_web/lib/block_scout_web/web_router.ex b/apps/block_scout_web/lib/block_scout_web/web_router.ex
index 9e754b37f6..36eee8f567 100644
--- a/apps/block_scout_web/lib/block_scout_web/web_router.ex
+++ b/apps/block_scout_web/lib/block_scout_web/web_router.ex
@@ -132,6 +132,13 @@ defmodule BlockScoutWeb.WebRouter do
         as: :read_proxy
       )
 
+      resources(
+        "/write_contract",
+        AddressWriteContractController,
+        only: [:index, :show],
+        as: :write_contract
+      )
+
       resources(
         "/token_transfers",
         AddressTokenTransferController,
diff --git a/apps/block_scout_web/priv/gettext/default.pot b/apps/block_scout_web/priv/gettext/default.pot
index fb4c6844f0..ec24a422cc 100644
--- a/apps/block_scout_web/priv/gettext/default.pot
+++ b/apps/block_scout_web/priv/gettext/default.pot
@@ -124,7 +124,7 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/address/_validator_metadata_modal.html.eex:16
 #: lib/block_scout_web/templates/transaction_log/_logs.html.eex:19
-#: lib/block_scout_web/views/address_view.ex:101
+#: lib/block_scout_web/views/address_view.ex:102
 msgid "Address"
 msgstr ""
 
@@ -338,14 +338,14 @@ msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address_contract_verification/new.html.eex:18
-#: lib/block_scout_web/views/address_view.ex:99
+#: lib/block_scout_web/views/address_view.ex:100
 msgid "Contract Address"
 msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/transaction/_pending_tile.html.eex:16
-#: lib/block_scout_web/views/address_view.ex:39
-#: lib/block_scout_web/views/address_view.ex:73
+#: lib/block_scout_web/views/address_view.ex:40
+#: lib/block_scout_web/views/address_view.ex:74
 msgid "Contract Address Pending"
 msgstr ""
 
@@ -568,7 +568,8 @@ msgid "ERC-721 "
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:50
+#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:31
+#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:66
 msgid "ETH"
 msgstr ""
 
@@ -903,7 +904,7 @@ msgstr ""
 #: lib/block_scout_web/templates/tokens/transfer/index.html.eex:14
 #: lib/block_scout_web/templates/transaction/_tabs.html.eex:4
 #: lib/block_scout_web/templates/transaction_token_transfer/index.html.eex:7
-#: lib/block_scout_web/views/address_view.ex:332
+#: lib/block_scout_web/views/address_view.ex:344
 #: lib/block_scout_web/views/tokens/instance/overview_view.ex:98
 #: lib/block_scout_web/views/tokens/overview_view.ex:35
 #: lib/block_scout_web/views/transaction_view.ex:394
@@ -1012,6 +1013,7 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/address_read_contract/index.html.eex:14
 #: lib/block_scout_web/templates/address_read_proxy/index.html.eex:14
+#: lib/block_scout_web/templates/address_write_contract/index.html.eex:14
 #: lib/block_scout_web/templates/tokens/read_contract/index.html.eex:20
 msgid "Loading..."
 msgstr ""
@@ -1042,7 +1044,7 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/chain/show.html.eex:52
 #: lib/block_scout_web/templates/layout/app.html.eex:30
-#: lib/block_scout_web/views/address_view.ex:139
+#: lib/block_scout_web/views/address_view.ex:140
 msgid "Market Cap"
 msgstr ""
 
@@ -1192,7 +1194,7 @@ msgid "QR Code"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:22
+#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:35
 msgid "Query"
 msgstr ""
 
@@ -1646,7 +1648,7 @@ msgid "View transaction %{transaction} on %{subnetwork}"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:49
+#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:65
 msgid "WEI"
 msgstr ""
 
@@ -1808,7 +1810,7 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:37
 #: lib/block_scout_web/templates/address_validation/index.html.eex:13
-#: lib/block_scout_web/views/address_view.ex:338
+#: lib/block_scout_web/views/address_view.ex:351
 msgid "Blocks Validated"
 msgstr ""
 
@@ -1818,18 +1820,18 @@ msgstr ""
 #: lib/block_scout_web/templates/api_docs/_action_tile.html.eex:187
 #: lib/block_scout_web/templates/api_docs/_eth_rpc_item.html.eex:126
 #: lib/block_scout_web/templates/api_docs/_eth_rpc_item.html.eex:149
-#: lib/block_scout_web/views/address_view.ex:333
+#: lib/block_scout_web/views/address_view.ex:345
 msgid "Code"
 msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:26
-#: lib/block_scout_web/views/address_view.ex:337
+#: lib/block_scout_web/views/address_view.ex:350
 msgid "Coin Balance History"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/views/address_view.ex:334
+#: lib/block_scout_web/views/address_view.ex:346
 msgid "Decompiled Code"
 msgstr ""
 
@@ -1838,7 +1840,7 @@ msgstr ""
 #: lib/block_scout_web/templates/address_internal_transaction/index.html.eex:19
 #: lib/block_scout_web/templates/transaction/_tabs.html.eex:11
 #: lib/block_scout_web/templates/transaction_internal_transaction/index.html.eex:6
-#: lib/block_scout_web/views/address_view.ex:331
+#: lib/block_scout_web/views/address_view.ex:343
 #: lib/block_scout_web/views/transaction_view.ex:395
 msgid "Internal Transactions"
 msgstr ""
@@ -1848,7 +1850,7 @@ msgstr ""
 #: lib/block_scout_web/templates/address_logs/index.html.eex:8
 #: lib/block_scout_web/templates/transaction/_tabs.html.eex:17
 #: lib/block_scout_web/templates/transaction_log/index.html.eex:8
-#: lib/block_scout_web/views/address_view.ex:339
+#: lib/block_scout_web/views/address_view.ex:352
 #: lib/block_scout_web/views/transaction_view.ex:396
 msgid "Logs"
 msgstr ""
@@ -1856,7 +1858,7 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:62
 #: lib/block_scout_web/templates/tokens/overview/_tabs.html.eex:25
-#: lib/block_scout_web/views/address_view.ex:335
+#: lib/block_scout_web/views/address_view.ex:347
 #: lib/block_scout_web/views/tokens/overview_view.ex:37
 msgid "Read Contract"
 msgstr ""
@@ -1865,7 +1867,7 @@ msgstr ""
 #: lib/block_scout_web/templates/address/_tabs.html.eex:14
 #: lib/block_scout_web/templates/address_token/index.html.eex:8
 #: lib/block_scout_web/templates/address_token_transfer/index.html.eex:11
-#: lib/block_scout_web/views/address_view.ex:329
+#: lib/block_scout_web/views/address_view.ex:341
 msgid "Tokens"
 msgstr ""
 
@@ -1877,7 +1879,7 @@ msgstr ""
 #: lib/block_scout_web/templates/block_transaction/index.html.eex:18
 #: lib/block_scout_web/templates/chain/show.html.eex:184
 #: lib/block_scout_web/templates/layout/_topnav.html.eex:50
-#: lib/block_scout_web/views/address_view.ex:330
+#: lib/block_scout_web/views/address_view.ex:342
 msgid "Transactions"
 msgstr ""
 
@@ -1917,6 +1919,12 @@ msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:69
-#: lib/block_scout_web/views/address_view.ex:336
+#: lib/block_scout_web/views/address_view.ex:348
 msgid "Read Proxy"
 msgstr ""
+
+#, elixir-format
+#: lib/block_scout_web/templates/address/_tabs.html.eex:76
+#: lib/block_scout_web/views/address_view.ex:349
+msgid "Write Contract"
+msgstr ""
diff --git a/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po b/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po
index fb4c6844f0..ec24a422cc 100644
--- a/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po
+++ b/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po
@@ -124,7 +124,7 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/address/_validator_metadata_modal.html.eex:16
 #: lib/block_scout_web/templates/transaction_log/_logs.html.eex:19
-#: lib/block_scout_web/views/address_view.ex:101
+#: lib/block_scout_web/views/address_view.ex:102
 msgid "Address"
 msgstr ""
 
@@ -338,14 +338,14 @@ msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address_contract_verification/new.html.eex:18
-#: lib/block_scout_web/views/address_view.ex:99
+#: lib/block_scout_web/views/address_view.ex:100
 msgid "Contract Address"
 msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/transaction/_pending_tile.html.eex:16
-#: lib/block_scout_web/views/address_view.ex:39
-#: lib/block_scout_web/views/address_view.ex:73
+#: lib/block_scout_web/views/address_view.ex:40
+#: lib/block_scout_web/views/address_view.ex:74
 msgid "Contract Address Pending"
 msgstr ""
 
@@ -568,7 +568,8 @@ msgid "ERC-721 "
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:50
+#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:31
+#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:66
 msgid "ETH"
 msgstr ""
 
@@ -903,7 +904,7 @@ msgstr ""
 #: lib/block_scout_web/templates/tokens/transfer/index.html.eex:14
 #: lib/block_scout_web/templates/transaction/_tabs.html.eex:4
 #: lib/block_scout_web/templates/transaction_token_transfer/index.html.eex:7
-#: lib/block_scout_web/views/address_view.ex:332
+#: lib/block_scout_web/views/address_view.ex:344
 #: lib/block_scout_web/views/tokens/instance/overview_view.ex:98
 #: lib/block_scout_web/views/tokens/overview_view.ex:35
 #: lib/block_scout_web/views/transaction_view.ex:394
@@ -1012,6 +1013,7 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/address_read_contract/index.html.eex:14
 #: lib/block_scout_web/templates/address_read_proxy/index.html.eex:14
+#: lib/block_scout_web/templates/address_write_contract/index.html.eex:14
 #: lib/block_scout_web/templates/tokens/read_contract/index.html.eex:20
 msgid "Loading..."
 msgstr ""
@@ -1042,7 +1044,7 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/chain/show.html.eex:52
 #: lib/block_scout_web/templates/layout/app.html.eex:30
-#: lib/block_scout_web/views/address_view.ex:139
+#: lib/block_scout_web/views/address_view.ex:140
 msgid "Market Cap"
 msgstr ""
 
@@ -1192,7 +1194,7 @@ msgid "QR Code"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:22
+#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:35
 msgid "Query"
 msgstr ""
 
@@ -1646,7 +1648,7 @@ msgid "View transaction %{transaction} on %{subnetwork}"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:49
+#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:65
 msgid "WEI"
 msgstr ""
 
@@ -1808,7 +1810,7 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:37
 #: lib/block_scout_web/templates/address_validation/index.html.eex:13
-#: lib/block_scout_web/views/address_view.ex:338
+#: lib/block_scout_web/views/address_view.ex:351
 msgid "Blocks Validated"
 msgstr ""
 
@@ -1818,18 +1820,18 @@ msgstr ""
 #: lib/block_scout_web/templates/api_docs/_action_tile.html.eex:187
 #: lib/block_scout_web/templates/api_docs/_eth_rpc_item.html.eex:126
 #: lib/block_scout_web/templates/api_docs/_eth_rpc_item.html.eex:149
-#: lib/block_scout_web/views/address_view.ex:333
+#: lib/block_scout_web/views/address_view.ex:345
 msgid "Code"
 msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:26
-#: lib/block_scout_web/views/address_view.ex:337
+#: lib/block_scout_web/views/address_view.ex:350
 msgid "Coin Balance History"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/views/address_view.ex:334
+#: lib/block_scout_web/views/address_view.ex:346
 msgid "Decompiled Code"
 msgstr ""
 
@@ -1838,7 +1840,7 @@ msgstr ""
 #: lib/block_scout_web/templates/address_internal_transaction/index.html.eex:19
 #: lib/block_scout_web/templates/transaction/_tabs.html.eex:11
 #: lib/block_scout_web/templates/transaction_internal_transaction/index.html.eex:6
-#: lib/block_scout_web/views/address_view.ex:331
+#: lib/block_scout_web/views/address_view.ex:343
 #: lib/block_scout_web/views/transaction_view.ex:395
 msgid "Internal Transactions"
 msgstr ""
@@ -1848,7 +1850,7 @@ msgstr ""
 #: lib/block_scout_web/templates/address_logs/index.html.eex:8
 #: lib/block_scout_web/templates/transaction/_tabs.html.eex:17
 #: lib/block_scout_web/templates/transaction_log/index.html.eex:8
-#: lib/block_scout_web/views/address_view.ex:339
+#: lib/block_scout_web/views/address_view.ex:352
 #: lib/block_scout_web/views/transaction_view.ex:396
 msgid "Logs"
 msgstr ""
@@ -1856,7 +1858,7 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:62
 #: lib/block_scout_web/templates/tokens/overview/_tabs.html.eex:25
-#: lib/block_scout_web/views/address_view.ex:335
+#: lib/block_scout_web/views/address_view.ex:347
 #: lib/block_scout_web/views/tokens/overview_view.ex:37
 msgid "Read Contract"
 msgstr ""
@@ -1865,7 +1867,7 @@ msgstr ""
 #: lib/block_scout_web/templates/address/_tabs.html.eex:14
 #: lib/block_scout_web/templates/address_token/index.html.eex:8
 #: lib/block_scout_web/templates/address_token_transfer/index.html.eex:11
-#: lib/block_scout_web/views/address_view.ex:329
+#: lib/block_scout_web/views/address_view.ex:341
 msgid "Tokens"
 msgstr ""
 
@@ -1877,7 +1879,7 @@ msgstr ""
 #: lib/block_scout_web/templates/block_transaction/index.html.eex:18
 #: lib/block_scout_web/templates/chain/show.html.eex:184
 #: lib/block_scout_web/templates/layout/_topnav.html.eex:50
-#: lib/block_scout_web/views/address_view.ex:330
+#: lib/block_scout_web/views/address_view.ex:342
 msgid "Transactions"
 msgstr ""
 
@@ -1917,6 +1919,12 @@ msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:69
-#: lib/block_scout_web/views/address_view.ex:336
+#: lib/block_scout_web/views/address_view.ex:348
 msgid "Read Proxy"
 msgstr ""
+
+#, elixir-format
+#: lib/block_scout_web/templates/address/_tabs.html.eex:76
+#: lib/block_scout_web/views/address_view.ex:349
+msgid "Write Contract"
+msgstr ""
diff --git a/apps/block_scout_web/test/block_scout_web/controllers/smart_contract_controller_test.exs b/apps/block_scout_web/test/block_scout_web/controllers/smart_contract_controller_test.exs
index dd22dd3144..a159460215 100644
--- a/apps/block_scout_web/test/block_scout_web/controllers/smart_contract_controller_test.exs
+++ b/apps/block_scout_web/test/block_scout_web/controllers/smart_contract_controller_test.exs
@@ -22,7 +22,7 @@ defmodule BlockScoutWeb.SmartContractControllerTest do
     end
 
     test "error for invalid address" do
-      path = smart_contract_path(BlockScoutWeb.Endpoint, :index, hash: "0x00", type: :regular)
+      path = smart_contract_path(BlockScoutWeb.Endpoint, :index, hash: "0x00", type: :regular, action: :read)
 
       conn =
         build_conn()
@@ -49,7 +49,12 @@ defmodule BlockScoutWeb.SmartContractControllerTest do
 
       blockchain_get_function_mock()
 
-      path = smart_contract_path(BlockScoutWeb.Endpoint, :index, hash: token_contract_address.hash, type: :regular)
+      path =
+        smart_contract_path(BlockScoutWeb.Endpoint, :index,
+          hash: token_contract_address.hash,
+          type: :regular,
+          action: :read
+        )
 
       conn =
         build_conn()
@@ -65,7 +70,12 @@ defmodule BlockScoutWeb.SmartContractControllerTest do
 
       insert(:smart_contract, address_hash: token_contract_address.hash)
 
-      path = smart_contract_path(BlockScoutWeb.Endpoint, :index, hash: token_contract_address.hash, type: :proxy)
+      path =
+        smart_contract_path(BlockScoutWeb.Endpoint, :index,
+          hash: token_contract_address.hash,
+          type: :proxy,
+          action: :read
+        )
 
       conn =
         build_conn()
diff --git a/apps/explorer/lib/explorer/smart_contract/reader.ex b/apps/explorer/lib/explorer/smart_contract/reader.ex
index a0aa48ff72..933922ecc3 100644
--- a/apps/explorer/lib/explorer/smart_contract/reader.ex
+++ b/apps/explorer/lib/explorer/smart_contract/reader.ex
@@ -199,7 +199,7 @@ defmodule Explorer.SmartContract.Reader do
     end
   end
 
-  defp fetch_current_value_from_blockchain(function, abi, contract_address_hash) do
+  def fetch_current_value_from_blockchain(function, abi, contract_address_hash) do
     values =
       case function do
         %{"inputs" => []} ->
diff --git a/apps/explorer/lib/explorer/smart_contract/writer.ex b/apps/explorer/lib/explorer/smart_contract/writer.ex
new file mode 100644
index 0000000000..b340395d14
--- /dev/null
+++ b/apps/explorer/lib/explorer/smart_contract/writer.ex
@@ -0,0 +1,28 @@
+defmodule Explorer.SmartContract.Writer do
+  @moduledoc """
+  Generates smart-contract transactions
+  """
+
+  alias Explorer.Chain
+
+  @spec write_functions(Hash.t()) :: [%{}]
+  def write_functions(contract_address_hash) do
+    abi =
+      contract_address_hash
+      |> Chain.address_hash_to_smart_contract()
+      |> Map.get(:abi)
+
+    case abi do
+      nil ->
+        []
+
+      _ ->
+        abi
+        |> Enum.filter(
+          &(&1["type"] !== "event" &&
+              (&1["stateMutability"] == "nonpayable" || &1["stateMutability"] == "payable" || &1["payable"] ||
+                 (!&1["payable"] && !&1["constant"] && !&1["stateMutability"])))
+        )
+    end
+  end
+end

From c8e8951a65365cd59836e4a4b5b92d1c7a751c3e Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Wed, 24 Jun 2020 13:56:20 +0300
Subject: [PATCH 04/34] Check if Metamask is authorized, increase container
 width to comply with increased max possible number of tabs

---
 .../assets/css/theme/_base_variables.scss     |  6 +++
 .../assets/js/lib/smart_contract/functions.js | 28 ++++++++--
 apps/block_scout_web/assets/package-lock.json | 52 ++++++++++++++++++-
 apps/block_scout_web/assets/package.json      |  1 +
 .../smart_contract/_functions.html.eex        |  2 +-
 5 files changed, 82 insertions(+), 7 deletions(-)

diff --git a/apps/block_scout_web/assets/css/theme/_base_variables.scss b/apps/block_scout_web/assets/css/theme/_base_variables.scss
index c24e66b96d..0f1188b319 100644
--- a/apps/block_scout_web/assets/css/theme/_base_variables.scss
+++ b/apps/block_scout_web/assets/css/theme/_base_variables.scss
@@ -215,6 +215,12 @@ $container-max-widths: (
 
 @include _assert-ascending($container-max-widths, "$container-max-widths");
 
+@media (min-width: 1200px) { 
+  .container {
+    max-width: 1180px !important;
+  }
+ }
+
 // Grid columns
 //
 // Set the number of columns and specify the width of the gutters.
diff --git a/apps/block_scout_web/assets/js/lib/smart_contract/functions.js b/apps/block_scout_web/assets/js/lib/smart_contract/functions.js
index 5c7b5c9127..77b9399e1f 100644
--- a/apps/block_scout_web/assets/js/lib/smart_contract/functions.js
+++ b/apps/block_scout_web/assets/js/lib/smart_contract/functions.js
@@ -1,4 +1,5 @@
 import $ from 'jquery'
+import ethNetProps from 'eth-net-props'
 import { walletEnabled, getCurrentAccount } from './write.js'
 import { openErrorModal, openWarningModal, openSuccessModal } from '../modals.js'
 
@@ -49,7 +50,8 @@ const readWriteFunction = (element) => {
       }
 
       $.get(url, data, response => $responseContainer.html(response))
-    } else {
+    } else if (action === 'write') {
+      const chainId = $form.data('chainId')
       walletEnabled()
         .then((isWalletEnabled) => {
           if (isWalletEnabled) {
@@ -63,13 +65,22 @@ const readWriteFunction = (element) => {
             const contractAddress = $form.data('contract-address')
             const contractAbi = $form.data('contract-abi')
 
-            getCurrentAccount()
+            window.web3.eth.getChainId()
+              .then(chainIdFromWallet => {
+                if (chainId !== chainIdFromWallet) {
+                  const networkDisplayNameFromWallet = ethNetProps.props.getNetworkDisplayName(chainIdFromWallet)
+                  const networkDisplayName = ethNetProps.props.getNetworkDisplayName(chainId)
+                  return Promise.reject(new Error(`You connected to ${networkDisplayNameFromWallet} chain in the wallet, but the current instance of Blockscout is for ${networkDisplayName} chain`))
+                } else {
+                  return getCurrentAccount()
+                }
+              })
               .then(currentAccount => {
                 const TargetContract = new window.web3.eth.Contract(contractAbi, contractAddress)
 
                 TargetContract.methods[functionName](...args).send({ from: currentAccount })
                   .on('error', function (error) {
-                    openErrorModal(`Error in sending transaction for method "${functionName}"`, error, false)
+                    openErrorModal(`Error in sending transaction for method "${functionName}"`, formatError(error), false)
                   })
                   .on('transactionHash', function (txHash) {
                     const getTxReceipt = (txHash) => {
@@ -84,14 +95,23 @@ const readWriteFunction = (element) => {
                     const txReceiptPollingIntervalId = setInterval(() => { getTxReceipt(txHash) }, 5 * 1000)
                   })
               })
+              .catch(error => {
+                openWarningModal('Unauthorized', formatError(error))
+              })
           } else {
-            openWarningModal('Unauthorized', 'You haven\'t approved the reading of account list from your MetaMask/Nifty wallet or MetaMask/Nifty wallet is not installed.')
+            openWarningModal('Unauthorized', 'You haven\'t approved the reading of account list from your MetaMask or MetaMask/Nifty wallet is locked or is not installed.')
           }
         })
     }
   })
 }
 
+const formatError = (error) => {
+  let { message } = error
+  message = message && message.split('Error: ').length > 1 ? message.split('Error: ')[1] : message
+  return message
+}
+
 const container = $('[data-smart-contract-functions]')
 
 if (container.length) {
diff --git a/apps/block_scout_web/assets/package-lock.json b/apps/block_scout_web/assets/package-lock.json
index c4ebf3ceb8..f7e09418ae 100644
--- a/apps/block_scout_web/assets/package-lock.json
+++ b/apps/block_scout_web/assets/package-lock.json
@@ -2336,6 +2336,11 @@
       "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-1.0.0.tgz",
       "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU="
     },
+    "assertion-error": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/assertion-error/-/assertion-error-1.1.0.tgz",
+      "integrity": "sha512-jgsaNduz+ndvGyFt3uSuWqvy4lCnIJiovtouQN5JZHOKCS2QuhEdbcQHFhVksz2N2U9hXJo8odG7ETyWlEeuDw=="
+    },
     "assign-symbols": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/assign-symbols/-/assign-symbols-1.0.0.tgz",
@@ -3095,6 +3100,19 @@
       "resolved": "https://registry.npmjs.org/caseless/-/caseless-0.12.0.tgz",
       "integrity": "sha1-G2gcIf+EAzyCZUMJBolCDRhxUdw="
     },
+    "chai": {
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/chai/-/chai-4.2.0.tgz",
+      "integrity": "sha512-XQU3bhBukrOsQCuwZndwGcCVQHyZi53fQ6Ys1Fym7E4olpIqqZZhhoFJoaKVvV17lWQoXYwgWN2nF5crA8J2jw==",
+      "requires": {
+        "assertion-error": "^1.1.0",
+        "check-error": "^1.0.2",
+        "deep-eql": "^3.0.1",
+        "get-func-name": "^2.0.0",
+        "pathval": "^1.1.0",
+        "type-detect": "^4.0.5"
+      }
+    },
     "chalk": {
       "version": "2.4.2",
       "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
@@ -3138,6 +3156,11 @@
         "color-name": "^1.0.0"
       }
     },
+    "check-error": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/check-error/-/check-error-1.0.2.tgz",
+      "integrity": "sha1-V00xLt2Iu13YkS6Sht1sCu1KrII="
+    },
     "chokidar": {
       "version": "2.1.8",
       "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-2.1.8.tgz",
@@ -4309,6 +4332,14 @@
         "mimic-response": "^1.0.0"
       }
     },
+    "deep-eql": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/deep-eql/-/deep-eql-3.0.1.tgz",
+      "integrity": "sha512-+QeIQyN5ZuO+3Uk5DYh6/1eKO0m0YmJFGNmFHGACpf1ClL1nmlV/p4gNgbl2pJGxgXb4faqo6UE+M5ACEMyVcw==",
+      "requires": {
+        "type-detect": "^4.0.0"
+      }
+    },
     "deep-is": {
       "version": "0.1.3",
       "resolved": "https://registry.npmjs.org/deep-is/-/deep-is-0.1.3.tgz",
@@ -5141,6 +5172,14 @@
         }
       }
     },
+    "eth-net-props": {
+      "version": "1.0.33",
+      "resolved": "https://registry.npmjs.org/eth-net-props/-/eth-net-props-1.0.33.tgz",
+      "integrity": "sha512-RoqoXkY3+ztjdD9EfbjnMapWqfRjUscPon4Vjt48RLHDDYyNmz7LiQ4Qgb4E41PNS7xRoGkQCWJvJRAI9vDsFQ==",
+      "requires": {
+        "chai": "^4.2.0"
+      }
+    },
     "ethereum-bloom-filters": {
       "version": "1.0.7",
       "resolved": "https://registry.npmjs.org/ethereum-bloom-filters/-/ethereum-bloom-filters-1.0.7.tgz",
@@ -5998,6 +6037,11 @@
       "integrity": "sha512-DyFP3BM/3YHTQOCUL/w0OZHR0lpKeGrxotcHWcqNEdnltqFwXVfhEBQ94eIo34AfQpo0rGki4cyIiftY06h2Fg==",
       "dev": true
     },
+    "get-func-name": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/get-func-name/-/get-func-name-2.0.0.tgz",
+      "integrity": "sha1-6td0q+5y4gQJQzoGY2YCPdaIekE="
+    },
     "get-stdin": {
       "version": "4.0.1",
       "resolved": "https://registry.npmjs.org/get-stdin/-/get-stdin-4.0.1.tgz",
@@ -10252,6 +10296,11 @@
         }
       }
     },
+    "pathval": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/pathval/-/pathval-1.1.0.tgz",
+      "integrity": "sha1-uULm1L3mUwBe9rcTYd74cn0GReA="
+    },
     "pbkdf2": {
       "version": "3.0.17",
       "resolved": "https://registry.npmjs.org/pbkdf2/-/pbkdf2-3.0.17.tgz",
@@ -14330,8 +14379,7 @@
     "type-detect": {
       "version": "4.0.8",
       "resolved": "https://registry.npmjs.org/type-detect/-/type-detect-4.0.8.tgz",
-      "integrity": "sha512-0fr/mIH1dlO+x7TlcMy+bIDqKPsw/70tVyeHW787goQjhmqaZe10uwLujubK9q9Lg6Fiho1KUKDYz0Z7k7g5/g==",
-      "dev": true
+      "integrity": "sha512-0fr/mIH1dlO+x7TlcMy+bIDqKPsw/70tVyeHW787goQjhmqaZe10uwLujubK9q9Lg6Fiho1KUKDYz0Z7k7g5/g=="
     },
     "type-fest": {
       "version": "0.8.1",
diff --git a/apps/block_scout_web/assets/package.json b/apps/block_scout_web/assets/package.json
index b5692f344c..47b990f54b 100644
--- a/apps/block_scout_web/assets/package.json
+++ b/apps/block_scout_web/assets/package.json
@@ -25,6 +25,7 @@
     "bootstrap": "^4.3.1",
     "chart.js": "^2.9.3",
     "clipboard": "^2.0.4",
+    "eth-net-props": "^1.0.33",
     "highlight.js": "^9.16.2",
     "highlightjs-solidity": "^1.0.8",
     "humps": "^2.0.1",
diff --git a/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex b/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex
index f5232c6e36..907bb57997 100644
--- a/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex
+++ b/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex
@@ -15,7 +15,7 @@
             render BlockScoutWeb.CommonComponentsView, "_modal_status.html", status: status
           end
         %>
-        <form class="form-inline" data-function-form data-action="<%= if writeable?(function), do: :write, else: :read %>" data-url="<%= smart_contract_path(@conn, :show, @address.hash) %>" data-contract-address="<%= @address.hash %>" data-contract-abi="<%= Poison.encode!(@address.smart_contract.abi) %>">
+        <form class="form-inline" data-function-form data-action="<%= if writeable?(function), do: :write, else: :read %>" data-url="<%= smart_contract_path(@conn, :show, @address.hash) %>" data-contract-address="<%= @address.hash %>" data-contract-abi="<%= Poison.encode!(@address.smart_contract.abi) %>" data-chain-id="<%= Explorer.Chain.Cache.NetVersion.get_version() %>">
           <input type="hidden" name="function_name" value='<%= function["name"] %>' />
 
           <%= if queryable?(function["inputs"]) do %>

From 9717502f6c86e532fc2f278ee7111f636ad03a88 Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Wed, 24 Jun 2020 15:27:53 +0300
Subject: [PATCH 05/34] A modal window with pending tx hash

---
 .../assets/css/components/_modal.scss         | 15 ++++++++++++
 apps/block_scout_web/assets/js/lib/modals.js  |  5 ++++
 .../assets/js/lib/smart_contract/functions.js |  3 ++-
 .../smart_contract/_functions.html.eex        |  1 +
 .../_pending_contract_write.html.eex          | 23 +++++++++++++++++++
 apps/block_scout_web/priv/gettext/default.pot | 14 +++++++----
 .../priv/gettext/en/LC_MESSAGES/default.po    | 14 +++++++----
 7 files changed, 66 insertions(+), 9 deletions(-)
 create mode 100644 apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_pending_contract_write.html.eex

diff --git a/apps/block_scout_web/assets/css/components/_modal.scss b/apps/block_scout_web/assets/css/components/_modal.scss
index c93b41bc02..b7c461d0a5 100644
--- a/apps/block_scout_web/assets/css/components/_modal.scss
+++ b/apps/block_scout_web/assets/css/components/_modal.scss
@@ -11,6 +11,11 @@
   padding: #{$modal-vertical-padding} #{$modal-horizontal-padding};
 }
 
+.modal-header-group {
+  display: inline-flex;
+  margin: 0 auto;
+}
+
 .close.close-modal{
   left: auto;
   opacity: 1;
@@ -39,6 +44,10 @@
   text-align: left;
   white-space: normal;
   word-break: break-word;
+
+  .centered {
+    margin: 0 auto;
+  }
 }
 
 .modal-content {
@@ -93,3 +102,9 @@
     }
   }
 }
+
+@media (min-width: 576px) {
+  .modal-dialog {
+    max-width: 530px !important;
+  }
+}
diff --git a/apps/block_scout_web/assets/js/lib/modals.js b/apps/block_scout_web/assets/js/lib/modals.js
index c37bd295c6..83c2b3b2d1 100644
--- a/apps/block_scout_web/assets/js/lib/modals.js
+++ b/apps/block_scout_web/assets/js/lib/modals.js
@@ -56,6 +56,11 @@ export function openModal ($modal, unclosable) {
   }
 }
 
+export function openModalWithMessage ($modal, unclosable, message) {
+  $modal.find('.modal-message').text(message)
+  openModal($modal, unclosable)
+}
+
 export function lockModal ($modal, $submitButton = null, spinnerText = '') {
   $modal.find('.close-modal').attr('disabled', true)
 
diff --git a/apps/block_scout_web/assets/js/lib/smart_contract/functions.js b/apps/block_scout_web/assets/js/lib/smart_contract/functions.js
index 77b9399e1f..7b847eb7d9 100644
--- a/apps/block_scout_web/assets/js/lib/smart_contract/functions.js
+++ b/apps/block_scout_web/assets/js/lib/smart_contract/functions.js
@@ -1,7 +1,7 @@
 import $ from 'jquery'
 import ethNetProps from 'eth-net-props'
 import { walletEnabled, getCurrentAccount } from './write.js'
-import { openErrorModal, openWarningModal, openSuccessModal } from '../modals.js'
+import { openErrorModal, openWarningModal, openSuccessModal, openModalWithMessage } from '../modals.js'
 
 const loadFunctions = (element) => {
   const $element = $(element)
@@ -83,6 +83,7 @@ const readWriteFunction = (element) => {
                     openErrorModal(`Error in sending transaction for method "${functionName}"`, formatError(error), false)
                   })
                   .on('transactionHash', function (txHash) {
+                    openModalWithMessage($element.find('#pending-contract-write'), true, txHash)
                     const getTxReceipt = (txHash) => {
                       window.web3.eth.getTransactionReceipt(txHash)
                         .then(txReceipt => {
diff --git a/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex b/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex
index 907bb57997..27704095db 100644
--- a/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex
+++ b/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex
@@ -15,6 +15,7 @@
             render BlockScoutWeb.CommonComponentsView, "_modal_status.html", status: status
           end
         %>
+        <%= render BlockScoutWeb.SmartContractView, "_pending_contract_write.html" %>
         <form class="form-inline" data-function-form data-action="<%= if writeable?(function), do: :write, else: :read %>" data-url="<%= smart_contract_path(@conn, :show, @address.hash) %>" data-contract-address="<%= @address.hash %>" data-contract-abi="<%= Poison.encode!(@address.smart_contract.abi) %>" data-chain-id="<%= Explorer.Chain.Cache.NetVersion.get_version() %>">
           <input type="hidden" name="function_name" value='<%= function["name"] %>' />
 
diff --git a/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_pending_contract_write.html.eex b/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_pending_contract_write.html.eex
new file mode 100644
index 0000000000..327c5e332e
--- /dev/null
+++ b/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_pending_contract_write.html.eex
@@ -0,0 +1,23 @@
+<div id="pending-contract-write" class="modal modal-fullwidth-xs fade" tabindex="-1" role="dialog" aria-hidden="true">
+  <div class="modal-dialog modal-dialog-centered modal-stake" role="document">
+    <div class="modal-content">
+      <%= render BlockScoutWeb.CommonComponentsView, "_modal_close_button.html" %>
+      <div class="modal-stake-two-cols">
+        <div class="modal-header">
+          <div class="modal-header-group">
+            <span class="loading-spinner-small mr-2">
+              <span class="loading-spinner-block-1"></span>
+              <span class="loading-spinner-block-2"></span>
+            </span>
+            <h5 class="modal-title centered"><%= gettext("Waiting for transaction's confirmation...") %></h5>
+          </div>
+        </div>
+        <div class="modal-body">
+          <form>
+            <p class="form-p modal-status-text modal-message"></p>
+          </form>
+        </div>
+      </div>
+    </div>
+  </div>
+</div>
\ No newline at end of file
diff --git a/apps/block_scout_web/priv/gettext/default.pot b/apps/block_scout_web/priv/gettext/default.pot
index ec24a422cc..98ecb34696 100644
--- a/apps/block_scout_web/priv/gettext/default.pot
+++ b/apps/block_scout_web/priv/gettext/default.pot
@@ -568,8 +568,8 @@ msgid "ERC-721 "
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:31
-#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:66
+#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:32
+#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:67
 msgid "ETH"
 msgstr ""
 
@@ -1194,7 +1194,7 @@ msgid "QR Code"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:35
+#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:36
 msgid "Query"
 msgstr ""
 
@@ -1648,7 +1648,7 @@ msgid "View transaction %{transaction} on %{subnetwork}"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:65
+#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:66
 msgid "WEI"
 msgstr ""
 
@@ -1928,3 +1928,9 @@ msgstr ""
 #: lib/block_scout_web/views/address_view.ex:349
 msgid "Write Contract"
 msgstr ""
+
+#, elixir-format
+#:
+#: lib/block_scout_web/templates/smart_contract/_pending_contract_write.html.eex:12
+msgid "Waiting for transaction's confirmation..."
+msgstr ""
diff --git a/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po b/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po
index ec24a422cc..98ecb34696 100644
--- a/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po
+++ b/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po
@@ -568,8 +568,8 @@ msgid "ERC-721 "
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:31
-#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:66
+#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:32
+#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:67
 msgid "ETH"
 msgstr ""
 
@@ -1194,7 +1194,7 @@ msgid "QR Code"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:35
+#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:36
 msgid "Query"
 msgstr ""
 
@@ -1648,7 +1648,7 @@ msgid "View transaction %{transaction} on %{subnetwork}"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:65
+#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:66
 msgid "WEI"
 msgstr ""
 
@@ -1928,3 +1928,9 @@ msgstr ""
 #: lib/block_scout_web/views/address_view.ex:349
 msgid "Write Contract"
 msgstr ""
+
+#, elixir-format
+#:
+#: lib/block_scout_web/templates/smart_contract/_pending_contract_write.html.eex:12
+msgid "Waiting for transaction's confirmation..."
+msgstr ""

From d0ce9e2e4352e5b33d7af142e4e889af012ed5a8 Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Wed, 24 Jun 2020 16:57:09 +0300
Subject: [PATCH 06/34] Write contract feature: support payble methods

---
 .../assets/js/lib/smart_contract/functions.js | 27 +++++++++++++++----
 .../smart_contract/_functions.html.eex        |  4 +--
 2 files changed, 24 insertions(+), 7 deletions(-)

diff --git a/apps/block_scout_web/assets/js/lib/smart_contract/functions.js b/apps/block_scout_web/assets/js/lib/smart_contract/functions.js
index 7b847eb7d9..284704548e 100644
--- a/apps/block_scout_web/assets/js/lib/smart_contract/functions.js
+++ b/apps/block_scout_web/assets/js/lib/smart_contract/functions.js
@@ -3,6 +3,8 @@ import ethNetProps from 'eth-net-props'
 import { walletEnabled, getCurrentAccount } from './write.js'
 import { openErrorModal, openWarningModal, openSuccessModal, openModalWithMessage } from '../modals.js'
 
+const WEI_MULTIPLIER = 10 ** 18
+
 const loadFunctions = (element) => {
   const $element = $(element)
   const url = $element.data('url')
@@ -58,9 +60,12 @@ const readWriteFunction = (element) => {
             const functionName = $form.find('input[name=function_name]').val()
 
             const $functionInputs = $form.find('input[name=function_input]')
-            const args = $.map($functionInputs, element => {
-              return $(element).val()
-            })
+            const $functionInputsExceptTxValue = $functionInputs.filter(':not([tx-value])')
+            const args = $.map($functionInputsExceptTxValue, element => $(element).val())
+
+            const $txValue = $functionInputs.filter('[tx-value]:first')
+
+            const txValue = $txValue && $txValue.val() && parseFloat($txValue.val()) * WEI_MULTIPLIER
 
             const contractAddress = $form.data('contract-address')
             const contractAbi = $form.data('contract-abi')
@@ -76,9 +81,21 @@ const readWriteFunction = (element) => {
                 }
               })
               .then(currentAccount => {
-                const TargetContract = new window.web3.eth.Contract(contractAbi, contractAddress)
+                let methodToCall
+
+                if (functionName) {
+                  const TargetContract = new window.web3.eth.Contract(contractAbi, contractAddress)
+                  methodToCall = TargetContract.methods[functionName](...args).send({ from: currentAccount, value: txValue })
+                } else {
+                  const txParams = {
+                    from: currentAccount,
+                    to: contractAddress,
+                    value: txValue
+                  }
+                  methodToCall = window.web3.eth.sendTransaction(txParams)
+                }
 
-                TargetContract.methods[functionName](...args).send({ from: currentAccount })
+                methodToCall
                   .on('error', function (error) {
                     openErrorModal(`Error in sending transaction for method "${functionName}"`, formatError(error), false)
                   })
diff --git a/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex b/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex
index 27704095db..7f928d75e7 100644
--- a/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex
+++ b/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex
@@ -3,7 +3,7 @@
     <div class="py-2 pr-2 text-nowrap">
       <%= counter %>.
 
-      <%= function["name"] || (if fallback?(function), do: "fallback", else: "") %>
+      <%= function["name"] %>
 
       &#8594;
     </div>
@@ -29,7 +29,7 @@
 
           <%= if payable?(function) do %>
             <div class="form-group pr-2">
-              <input type="text" name="function_input" class="form-control form-control-sm address-input-sm mt-2" placeholder='value(<%= gettext("ETH")%>)'  />
+              <input type="text" name="function_input" tx-value class="form-control form-control-sm address-input-sm mt-2" placeholder='value(<%= gettext("ETH")%>)'  />
             </div>
           <% end %>
 

From 56b5cad5ae8b64a95d91399e623aa0657cf2612b Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Wed, 24 Jun 2020 17:35:21 +0300
Subject: [PATCH 07/34] Change button name from query to write

---
 .../templates/smart_contract/_functions.html.eex             | 2 +-
 apps/block_scout_web/priv/gettext/default.pot                | 5 +++++
 apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po  | 5 +++++
 3 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex b/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex
index 7f928d75e7..0b95298218 100644
--- a/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex
+++ b/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex
@@ -33,7 +33,7 @@
             </div>
           <% end %>
 
-          <input type="submit" value='<%= gettext("Query")%>' class="button btn-line button-xs py-0 mt-2" style="padding: 6px 8px!important;height: 26px;font-size: 11px;" />
+          <input type="submit" value='<%= if writeable?(function), do: gettext("Write"), else: gettext("Query")%>' class="button btn-line button-xs py-0 mt-2" style="padding: 6px 8px!important;height: 26px;font-size: 11px;" />
         </form>
 
         <%= if outputs?(function["outputs"]) do %>
diff --git a/apps/block_scout_web/priv/gettext/default.pot b/apps/block_scout_web/priv/gettext/default.pot
index 98ecb34696..4f94fa00c7 100644
--- a/apps/block_scout_web/priv/gettext/default.pot
+++ b/apps/block_scout_web/priv/gettext/default.pot
@@ -1934,3 +1934,8 @@ msgstr ""
 #: lib/block_scout_web/templates/smart_contract/_pending_contract_write.html.eex:12
 msgid "Waiting for transaction's confirmation..."
 msgstr ""
+
+#, elixir-format
+#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:36
+msgid "Write"
+msgstr ""
diff --git a/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po b/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po
index 98ecb34696..4f94fa00c7 100644
--- a/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po
+++ b/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po
@@ -1934,3 +1934,8 @@ msgstr ""
 #: lib/block_scout_web/templates/smart_contract/_pending_contract_write.html.eex:12
 msgid "Waiting for transaction's confirmation..."
 msgstr ""
+
+#, elixir-format
+#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:36
+msgid "Write"
+msgstr ""

From 568eaf02ef5d14ca4882df82a5125752f35ee467 Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Thu, 25 Jun 2020 14:04:03 +0300
Subject: [PATCH 08/34] Write proxy contract feature

---
 CHANGELOG.md                                  |  1 +
 .../assets/css/theme/_base_variables.scss     |  2 +-
 .../assets/js/lib/smart_contract/functions.js |  9 ++--
 ...x => address_write_contract_controller.ex} |  0
 .../address_write_proxy_controller.ex         | 39 ++++++++++++++++++
 .../controllers/smart_contract_controller.ex  | 24 ++++++++++-
 .../templates/address/_tabs.html.eex          |  7 ++++
 .../address_write_proxy/_metatags.html.eex    |  1 +
 .../address_write_proxy/index.html.eex        | 20 +++++++++
 .../smart_contract/_functions.html.eex        |  2 +-
 .../lib/block_scout_web/views/address_view.ex |  2 +
 .../views/address_write_proxy_view.ex         | 13 ++++++
 .../lib/block_scout_web/web_router.ex         |  7 ++++
 apps/block_scout_web/priv/gettext/default.pot | 41 +++++++++++--------
 .../priv/gettext/en/LC_MESSAGES/default.po    | 41 +++++++++++--------
 .../lib/explorer/smart_contract/writer.ex     | 23 +++++++++++
 16 files changed, 191 insertions(+), 41 deletions(-)
 rename apps/block_scout_web/lib/block_scout_web/controllers/{address_write_contract_controlle.ex => address_write_contract_controller.ex} (100%)
 create mode 100644 apps/block_scout_web/lib/block_scout_web/controllers/address_write_proxy_controller.ex
 create mode 100644 apps/block_scout_web/lib/block_scout_web/templates/address_write_proxy/_metatags.html.eex
 create mode 100644 apps/block_scout_web/lib/block_scout_web/templates/address_write_proxy/index.html.eex
 create mode 100644 apps/block_scout_web/lib/block_scout_web/views/address_write_proxy_view.ex

diff --git a/CHANGELOG.md b/CHANGELOG.md
index d8144bbf16..1c9e91c0fd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
 ## Current
 
 ### Features
+- [#3161](https://github.com/poanetwork/blockscout/pull/3161) - Write proxy contracts feature
 - [#3160](https://github.com/poanetwork/blockscout/pull/3160) - Write contracts feature
 - [#3157](https://github.com/poanetwork/blockscout/pull/3157) - Read methods of implementation on proxy contract
 
diff --git a/apps/block_scout_web/assets/css/theme/_base_variables.scss b/apps/block_scout_web/assets/css/theme/_base_variables.scss
index 0f1188b319..c39c7ffbff 100644
--- a/apps/block_scout_web/assets/css/theme/_base_variables.scss
+++ b/apps/block_scout_web/assets/css/theme/_base_variables.scss
@@ -217,7 +217,7 @@ $container-max-widths: (
 
 @media (min-width: 1200px) { 
   .container {
-    max-width: 1180px !important;
+    max-width: 1260px !important;
   }
  }
 
diff --git a/apps/block_scout_web/assets/js/lib/smart_contract/functions.js b/apps/block_scout_web/assets/js/lib/smart_contract/functions.js
index 284704548e..641f416755 100644
--- a/apps/block_scout_web/assets/js/lib/smart_contract/functions.js
+++ b/apps/block_scout_web/assets/js/lib/smart_contract/functions.js
@@ -35,6 +35,7 @@ const readWriteFunction = (element) => {
 
   $form.on('submit', (event) => {
     const action = $form.data('action')
+    const contractType = $form.data('contract-type')
     event.preventDefault()
 
     if (action === 'read') {
@@ -68,7 +69,9 @@ const readWriteFunction = (element) => {
             const txValue = $txValue && $txValue.val() && parseFloat($txValue.val()) * WEI_MULTIPLIER
 
             const contractAddress = $form.data('contract-address')
-            const contractAbi = $form.data('contract-abi')
+            const implementationAbi = $form.data('implementation-abi')
+            const parentAbi = $form.data('contract-abi')
+            const contractAbi = contractType === 'proxy' ? implementationAbi : parentAbi
 
             window.web3.eth.getChainId()
               .then(chainIdFromWallet => {
@@ -85,12 +88,12 @@ const readWriteFunction = (element) => {
 
                 if (functionName) {
                   const TargetContract = new window.web3.eth.Contract(contractAbi, contractAddress)
-                  methodToCall = TargetContract.methods[functionName](...args).send({ from: currentAccount, value: txValue })
+                  methodToCall = TargetContract.methods[functionName](...args).send({ from: currentAccount, value: txValue || 0 })
                 } else {
                   const txParams = {
                     from: currentAccount,
                     to: contractAddress,
-                    value: txValue
+                    value: txValue || 0
                   }
                   methodToCall = window.web3.eth.sendTransaction(txParams)
                 }
diff --git a/apps/block_scout_web/lib/block_scout_web/controllers/address_write_contract_controlle.ex b/apps/block_scout_web/lib/block_scout_web/controllers/address_write_contract_controller.ex
similarity index 100%
rename from apps/block_scout_web/lib/block_scout_web/controllers/address_write_contract_controlle.ex
rename to apps/block_scout_web/lib/block_scout_web/controllers/address_write_contract_controller.ex
diff --git a/apps/block_scout_web/lib/block_scout_web/controllers/address_write_proxy_controller.ex b/apps/block_scout_web/lib/block_scout_web/controllers/address_write_proxy_controller.ex
new file mode 100644
index 0000000000..1e558f7bbb
--- /dev/null
+++ b/apps/block_scout_web/lib/block_scout_web/controllers/address_write_proxy_controller.ex
@@ -0,0 +1,39 @@
+# credo:disable-for-this-file
+defmodule BlockScoutWeb.AddressWriteProxyController do
+  use BlockScoutWeb, :controller
+
+  alias Explorer.{Chain, Market}
+  alias Explorer.Chain.Address
+  alias Explorer.ExchangeRates.Token
+  alias Indexer.Fetcher.CoinBalanceOnDemand
+
+  def index(conn, %{"address_id" => address_hash_string}) do
+    address_options = [
+      necessity_by_association: %{
+        :contracts_creation_internal_transaction => :optional,
+        :names => :optional,
+        :smart_contract => :optional,
+        :token => :optional,
+        :contracts_creation_transaction => :optional
+      }
+    ]
+
+    with {:ok, address_hash} <- Chain.string_to_address_hash(address_hash_string),
+         {:ok, address} <- Chain.find_contract_address(address_hash, address_options, true),
+         false <- is_nil(address.smart_contract) do
+      render(
+        conn,
+        "index.html",
+        address: address,
+        type: :proxy,
+        action: :write,
+        coin_balance_status: CoinBalanceOnDemand.trigger_fetch(address),
+        exchange_rate: Market.get_exchange_rate(Explorer.coin()) || Token.null(),
+        counters_path: address_path(conn, :address_counters, %{"id" => Address.checksum(address_hash)})
+      )
+    else
+      _ ->
+        not_found(conn)
+    end
+  end
+end
diff --git a/apps/block_scout_web/lib/block_scout_web/controllers/smart_contract_controller.ex b/apps/block_scout_web/lib/block_scout_web/controllers/smart_contract_controller.ex
index ccfd6c165b..06fd117470 100644
--- a/apps/block_scout_web/lib/block_scout_web/controllers/smart_contract_controller.ex
+++ b/apps/block_scout_web/lib/block_scout_web/controllers/smart_contract_controller.ex
@@ -16,7 +16,11 @@ defmodule BlockScoutWeb.SmartContractController do
          {:ok, address} <- Chain.find_contract_address(address_hash, address_options, true) do
       functions =
         if action == "write" do
-          Writer.write_functions(address_hash)
+          if contract_type == "proxy" do
+            Writer.write_functions_proxy(address_hash)
+          else
+            Writer.write_functions(address_hash)
+          end
         else
           if contract_type == "proxy" do
             Reader.read_only_functions_proxy(address_hash)
@@ -25,13 +29,29 @@ defmodule BlockScoutWeb.SmartContractController do
           end
         end
 
+      contract_abi = Poison.encode!(address.smart_contract.abi)
+
+      implementation_abi =
+        if contract_type == "proxy" do
+          address.hash
+          |> Chain.get_implementation_abi_from_proxy(address.smart_contract.abi)
+          |> Poison.encode!()
+        else
+          []
+        end
+
+      contract_type = if Chain.is_proxy_contract?(address.smart_contract.abi), do: :proxy, else: :regular
+
       conn
       |> put_status(200)
       |> put_layout(false)
       |> render(
         "_functions.html",
         read_only_functions: functions,
-        address: address
+        address: address,
+        contract_abi: contract_abi,
+        implementation_abi: implementation_abi,
+        contract_type: contract_type
       )
     else
       :error ->
diff --git a/apps/block_scout_web/lib/block_scout_web/templates/address/_tabs.html.eex b/apps/block_scout_web/lib/block_scout_web/templates/address/_tabs.html.eex
index d6345ad84d..457f788528 100644
--- a/apps/block_scout_web/lib/block_scout_web/templates/address/_tabs.html.eex
+++ b/apps/block_scout_web/lib/block_scout_web/templates/address/_tabs.html.eex
@@ -78,4 +78,11 @@
         class: "card-tab #{tab_status("write_contract", @conn.request_path)}")
         %>
   <% end %>
+  <%= if smart_contract_with_write_functions?(@address) && smart_contract_is_proxy?(@address)  do %>
+    <%= link(
+        gettext("Write Proxy"),
+        to: address_write_proxy_path(@conn, :index, @address.hash),
+        class: "card-tab #{tab_status("write_proxy", @conn.request_path)}")
+        %>
+  <% end %>
 </div>
diff --git a/apps/block_scout_web/lib/block_scout_web/templates/address_write_proxy/_metatags.html.eex b/apps/block_scout_web/lib/block_scout_web/templates/address_write_proxy/_metatags.html.eex
new file mode 100644
index 0000000000..3ef2a67ca2
--- /dev/null
+++ b/apps/block_scout_web/lib/block_scout_web/templates/address_write_proxy/_metatags.html.eex
@@ -0,0 +1 @@
+<%= render BlockScoutWeb.AddressView, "_metatags.html", conn: @conn, address: @address %>
diff --git a/apps/block_scout_web/lib/block_scout_web/templates/address_write_proxy/index.html.eex b/apps/block_scout_web/lib/block_scout_web/templates/address_write_proxy/index.html.eex
new file mode 100644
index 0000000000..34c5dcffcf
--- /dev/null
+++ b/apps/block_scout_web/lib/block_scout_web/templates/address_write_proxy/index.html.eex
@@ -0,0 +1,20 @@
+<section class="container">
+
+  <%= render BlockScoutWeb.AddressView, "overview.html", assigns %>
+
+  <div class="card">
+    <%= render BlockScoutWeb.AddressView, "_tabs.html", assigns %>
+    <!-- loaded via AJAX -->
+    <div class="card-body" data-smart-contract-functions data-hash="<%= to_string(@address.hash) %>" data-type="<%= @type %>" data-action="<%= @action %>" data-url="<%= smart_contract_path(@conn, :index) %>">
+      <div>
+        <span class="loading-spinner-small mr-2">
+          <span class="loading-spinner-block-1"></span>
+          <span class="loading-spinner-block-2"></span>
+        </span>
+        <%= gettext("Loading...") %>
+      </div>
+    </div>
+  </div>
+  <script defer data-cfasync="false" src="<%= static_path(@conn, "/js/smart-contract-helpers.js") %>"></script>
+  <script defer data-cfasync="false" src="<%= static_path(@conn, "/js/write_contract.js") %>"></script>
+</section>
diff --git a/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex b/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex
index 0b95298218..cd2a0d5e9f 100644
--- a/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex
+++ b/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex
@@ -16,7 +16,7 @@
           end
         %>
         <%= render BlockScoutWeb.SmartContractView, "_pending_contract_write.html" %>
-        <form class="form-inline" data-function-form data-action="<%= if writeable?(function), do: :write, else: :read %>" data-url="<%= smart_contract_path(@conn, :show, @address.hash) %>" data-contract-address="<%= @address.hash %>" data-contract-abi="<%= Poison.encode!(@address.smart_contract.abi) %>" data-chain-id="<%= Explorer.Chain.Cache.NetVersion.get_version() %>">
+        <form class="form-inline" data-function-form data-action="<%= if writeable?(function), do: :write, else: :read %>" data-contract-type="<%= @contract_type %>" data-url="<%= smart_contract_path(@conn, :show, @address.hash) %>" data-contract-address="<%= @address.hash %>" data-contract-abi="<%= @contract_abi %>" data-implementation-abi="<%= @implementation_abi  %>" data-chain-id="<%= Explorer.Chain.Cache.NetVersion.get_version() %>">
           <input type="hidden" name="function_name" value='<%= function["name"] %>' />
 
           <%= if queryable?(function["inputs"]) do %>
diff --git a/apps/block_scout_web/lib/block_scout_web/views/address_view.ex b/apps/block_scout_web/lib/block_scout_web/views/address_view.ex
index 36814cfec4..0e38ba6654 100644
--- a/apps/block_scout_web/lib/block_scout_web/views/address_view.ex
+++ b/apps/block_scout_web/lib/block_scout_web/views/address_view.ex
@@ -20,6 +20,7 @@ defmodule BlockScoutWeb.AddressView do
     "read_contract",
     "read_proxy",
     "write_contract",
+    "write_proxy",
     "tokens",
     "transactions",
     "validations"
@@ -347,6 +348,7 @@ defmodule BlockScoutWeb.AddressView do
   defp tab_name(["read_contract"]), do: gettext("Read Contract")
   defp tab_name(["read_proxy"]), do: gettext("Read Proxy")
   defp tab_name(["write_contract"]), do: gettext("Write Contract")
+  defp tab_name(["write_proxy"]), do: gettext("Write Proxy")
   defp tab_name(["coin_balances"]), do: gettext("Coin Balance History")
   defp tab_name(["validations"]), do: gettext("Blocks Validated")
   defp tab_name(["logs"]), do: gettext("Logs")
diff --git a/apps/block_scout_web/lib/block_scout_web/views/address_write_proxy_view.ex b/apps/block_scout_web/lib/block_scout_web/views/address_write_proxy_view.ex
new file mode 100644
index 0000000000..9825477c3d
--- /dev/null
+++ b/apps/block_scout_web/lib/block_scout_web/views/address_write_proxy_view.ex
@@ -0,0 +1,13 @@
+defmodule BlockScoutWeb.AddressWriteProxyView do
+  use BlockScoutWeb, :view
+
+  def queryable?(inputs) when not is_nil(inputs), do: Enum.any?(inputs)
+
+  def queryable?(inputs) when is_nil(inputs), do: false
+
+  def outputs?(outputs) when not is_nil(outputs), do: Enum.any?(outputs)
+
+  def outputs?(outputs) when is_nil(outputs), do: false
+
+  def address?(type), do: type == "address"
+end
diff --git a/apps/block_scout_web/lib/block_scout_web/web_router.ex b/apps/block_scout_web/lib/block_scout_web/web_router.ex
index 36eee8f567..fd0fc0e444 100644
--- a/apps/block_scout_web/lib/block_scout_web/web_router.ex
+++ b/apps/block_scout_web/lib/block_scout_web/web_router.ex
@@ -139,6 +139,13 @@ defmodule BlockScoutWeb.WebRouter do
         as: :write_contract
       )
 
+      resources(
+        "/write_proxy",
+        AddressWriteProxyController,
+        only: [:index, :show],
+        as: :write_proxy
+      )
+
       resources(
         "/token_transfers",
         AddressTokenTransferController,
diff --git a/apps/block_scout_web/priv/gettext/default.pot b/apps/block_scout_web/priv/gettext/default.pot
index 4f94fa00c7..8963d56fd0 100644
--- a/apps/block_scout_web/priv/gettext/default.pot
+++ b/apps/block_scout_web/priv/gettext/default.pot
@@ -124,7 +124,7 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/address/_validator_metadata_modal.html.eex:16
 #: lib/block_scout_web/templates/transaction_log/_logs.html.eex:19
-#: lib/block_scout_web/views/address_view.ex:102
+#: lib/block_scout_web/views/address_view.ex:103
 msgid "Address"
 msgstr ""
 
@@ -338,14 +338,14 @@ msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address_contract_verification/new.html.eex:18
-#: lib/block_scout_web/views/address_view.ex:100
+#: lib/block_scout_web/views/address_view.ex:101
 msgid "Contract Address"
 msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/transaction/_pending_tile.html.eex:16
-#: lib/block_scout_web/views/address_view.ex:40
-#: lib/block_scout_web/views/address_view.ex:74
+#: lib/block_scout_web/views/address_view.ex:41
+#: lib/block_scout_web/views/address_view.ex:75
 msgid "Contract Address Pending"
 msgstr ""
 
@@ -904,7 +904,7 @@ msgstr ""
 #: lib/block_scout_web/templates/tokens/transfer/index.html.eex:14
 #: lib/block_scout_web/templates/transaction/_tabs.html.eex:4
 #: lib/block_scout_web/templates/transaction_token_transfer/index.html.eex:7
-#: lib/block_scout_web/views/address_view.ex:344
+#: lib/block_scout_web/views/address_view.ex:345
 #: lib/block_scout_web/views/tokens/instance/overview_view.ex:98
 #: lib/block_scout_web/views/tokens/overview_view.ex:35
 #: lib/block_scout_web/views/transaction_view.ex:394
@@ -1014,6 +1014,7 @@ msgstr ""
 #: lib/block_scout_web/templates/address_read_contract/index.html.eex:14
 #: lib/block_scout_web/templates/address_read_proxy/index.html.eex:14
 #: lib/block_scout_web/templates/address_write_contract/index.html.eex:14
+#: lib/block_scout_web/templates/address_write_proxy/index.html.eex:14
 #: lib/block_scout_web/templates/tokens/read_contract/index.html.eex:20
 msgid "Loading..."
 msgstr ""
@@ -1044,7 +1045,7 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/chain/show.html.eex:52
 #: lib/block_scout_web/templates/layout/app.html.eex:30
-#: lib/block_scout_web/views/address_view.ex:140
+#: lib/block_scout_web/views/address_view.ex:141
 msgid "Market Cap"
 msgstr ""
 
@@ -1810,7 +1811,7 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:37
 #: lib/block_scout_web/templates/address_validation/index.html.eex:13
-#: lib/block_scout_web/views/address_view.ex:351
+#: lib/block_scout_web/views/address_view.ex:353
 msgid "Blocks Validated"
 msgstr ""
 
@@ -1820,18 +1821,18 @@ msgstr ""
 #: lib/block_scout_web/templates/api_docs/_action_tile.html.eex:187
 #: lib/block_scout_web/templates/api_docs/_eth_rpc_item.html.eex:126
 #: lib/block_scout_web/templates/api_docs/_eth_rpc_item.html.eex:149
-#: lib/block_scout_web/views/address_view.ex:345
+#: lib/block_scout_web/views/address_view.ex:346
 msgid "Code"
 msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:26
-#: lib/block_scout_web/views/address_view.ex:350
+#: lib/block_scout_web/views/address_view.ex:352
 msgid "Coin Balance History"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/views/address_view.ex:346
+#: lib/block_scout_web/views/address_view.ex:347
 msgid "Decompiled Code"
 msgstr ""
 
@@ -1840,7 +1841,7 @@ msgstr ""
 #: lib/block_scout_web/templates/address_internal_transaction/index.html.eex:19
 #: lib/block_scout_web/templates/transaction/_tabs.html.eex:11
 #: lib/block_scout_web/templates/transaction_internal_transaction/index.html.eex:6
-#: lib/block_scout_web/views/address_view.ex:343
+#: lib/block_scout_web/views/address_view.ex:344
 #: lib/block_scout_web/views/transaction_view.ex:395
 msgid "Internal Transactions"
 msgstr ""
@@ -1850,7 +1851,7 @@ msgstr ""
 #: lib/block_scout_web/templates/address_logs/index.html.eex:8
 #: lib/block_scout_web/templates/transaction/_tabs.html.eex:17
 #: lib/block_scout_web/templates/transaction_log/index.html.eex:8
-#: lib/block_scout_web/views/address_view.ex:352
+#: lib/block_scout_web/views/address_view.ex:354
 #: lib/block_scout_web/views/transaction_view.ex:396
 msgid "Logs"
 msgstr ""
@@ -1858,7 +1859,7 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:62
 #: lib/block_scout_web/templates/tokens/overview/_tabs.html.eex:25
-#: lib/block_scout_web/views/address_view.ex:347
+#: lib/block_scout_web/views/address_view.ex:348
 #: lib/block_scout_web/views/tokens/overview_view.ex:37
 msgid "Read Contract"
 msgstr ""
@@ -1867,7 +1868,7 @@ msgstr ""
 #: lib/block_scout_web/templates/address/_tabs.html.eex:14
 #: lib/block_scout_web/templates/address_token/index.html.eex:8
 #: lib/block_scout_web/templates/address_token_transfer/index.html.eex:11
-#: lib/block_scout_web/views/address_view.ex:341
+#: lib/block_scout_web/views/address_view.ex:342
 msgid "Tokens"
 msgstr ""
 
@@ -1879,7 +1880,7 @@ msgstr ""
 #: lib/block_scout_web/templates/block_transaction/index.html.eex:18
 #: lib/block_scout_web/templates/chain/show.html.eex:184
 #: lib/block_scout_web/templates/layout/_topnav.html.eex:50
-#: lib/block_scout_web/views/address_view.ex:342
+#: lib/block_scout_web/views/address_view.ex:343
 msgid "Transactions"
 msgstr ""
 
@@ -1919,13 +1920,13 @@ msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:69
-#: lib/block_scout_web/views/address_view.ex:348
+#: lib/block_scout_web/views/address_view.ex:349
 msgid "Read Proxy"
 msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:76
-#: lib/block_scout_web/views/address_view.ex:349
+#: lib/block_scout_web/views/address_view.ex:350
 msgid "Write Contract"
 msgstr ""
 
@@ -1939,3 +1940,9 @@ msgstr ""
 #: lib/block_scout_web/templates/smart_contract/_functions.html.eex:36
 msgid "Write"
 msgstr ""
+
+#, elixir-format
+#: lib/block_scout_web/templates/address/_tabs.html.eex:83
+#: lib/block_scout_web/views/address_view.ex:351
+msgid "Write Proxy"
+msgstr ""
diff --git a/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po b/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po
index 4f94fa00c7..8963d56fd0 100644
--- a/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po
+++ b/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po
@@ -124,7 +124,7 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/address/_validator_metadata_modal.html.eex:16
 #: lib/block_scout_web/templates/transaction_log/_logs.html.eex:19
-#: lib/block_scout_web/views/address_view.ex:102
+#: lib/block_scout_web/views/address_view.ex:103
 msgid "Address"
 msgstr ""
 
@@ -338,14 +338,14 @@ msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address_contract_verification/new.html.eex:18
-#: lib/block_scout_web/views/address_view.ex:100
+#: lib/block_scout_web/views/address_view.ex:101
 msgid "Contract Address"
 msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/transaction/_pending_tile.html.eex:16
-#: lib/block_scout_web/views/address_view.ex:40
-#: lib/block_scout_web/views/address_view.ex:74
+#: lib/block_scout_web/views/address_view.ex:41
+#: lib/block_scout_web/views/address_view.ex:75
 msgid "Contract Address Pending"
 msgstr ""
 
@@ -904,7 +904,7 @@ msgstr ""
 #: lib/block_scout_web/templates/tokens/transfer/index.html.eex:14
 #: lib/block_scout_web/templates/transaction/_tabs.html.eex:4
 #: lib/block_scout_web/templates/transaction_token_transfer/index.html.eex:7
-#: lib/block_scout_web/views/address_view.ex:344
+#: lib/block_scout_web/views/address_view.ex:345
 #: lib/block_scout_web/views/tokens/instance/overview_view.ex:98
 #: lib/block_scout_web/views/tokens/overview_view.ex:35
 #: lib/block_scout_web/views/transaction_view.ex:394
@@ -1014,6 +1014,7 @@ msgstr ""
 #: lib/block_scout_web/templates/address_read_contract/index.html.eex:14
 #: lib/block_scout_web/templates/address_read_proxy/index.html.eex:14
 #: lib/block_scout_web/templates/address_write_contract/index.html.eex:14
+#: lib/block_scout_web/templates/address_write_proxy/index.html.eex:14
 #: lib/block_scout_web/templates/tokens/read_contract/index.html.eex:20
 msgid "Loading..."
 msgstr ""
@@ -1044,7 +1045,7 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/chain/show.html.eex:52
 #: lib/block_scout_web/templates/layout/app.html.eex:30
-#: lib/block_scout_web/views/address_view.ex:140
+#: lib/block_scout_web/views/address_view.ex:141
 msgid "Market Cap"
 msgstr ""
 
@@ -1810,7 +1811,7 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:37
 #: lib/block_scout_web/templates/address_validation/index.html.eex:13
-#: lib/block_scout_web/views/address_view.ex:351
+#: lib/block_scout_web/views/address_view.ex:353
 msgid "Blocks Validated"
 msgstr ""
 
@@ -1820,18 +1821,18 @@ msgstr ""
 #: lib/block_scout_web/templates/api_docs/_action_tile.html.eex:187
 #: lib/block_scout_web/templates/api_docs/_eth_rpc_item.html.eex:126
 #: lib/block_scout_web/templates/api_docs/_eth_rpc_item.html.eex:149
-#: lib/block_scout_web/views/address_view.ex:345
+#: lib/block_scout_web/views/address_view.ex:346
 msgid "Code"
 msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:26
-#: lib/block_scout_web/views/address_view.ex:350
+#: lib/block_scout_web/views/address_view.ex:352
 msgid "Coin Balance History"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/views/address_view.ex:346
+#: lib/block_scout_web/views/address_view.ex:347
 msgid "Decompiled Code"
 msgstr ""
 
@@ -1840,7 +1841,7 @@ msgstr ""
 #: lib/block_scout_web/templates/address_internal_transaction/index.html.eex:19
 #: lib/block_scout_web/templates/transaction/_tabs.html.eex:11
 #: lib/block_scout_web/templates/transaction_internal_transaction/index.html.eex:6
-#: lib/block_scout_web/views/address_view.ex:343
+#: lib/block_scout_web/views/address_view.ex:344
 #: lib/block_scout_web/views/transaction_view.ex:395
 msgid "Internal Transactions"
 msgstr ""
@@ -1850,7 +1851,7 @@ msgstr ""
 #: lib/block_scout_web/templates/address_logs/index.html.eex:8
 #: lib/block_scout_web/templates/transaction/_tabs.html.eex:17
 #: lib/block_scout_web/templates/transaction_log/index.html.eex:8
-#: lib/block_scout_web/views/address_view.ex:352
+#: lib/block_scout_web/views/address_view.ex:354
 #: lib/block_scout_web/views/transaction_view.ex:396
 msgid "Logs"
 msgstr ""
@@ -1858,7 +1859,7 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:62
 #: lib/block_scout_web/templates/tokens/overview/_tabs.html.eex:25
-#: lib/block_scout_web/views/address_view.ex:347
+#: lib/block_scout_web/views/address_view.ex:348
 #: lib/block_scout_web/views/tokens/overview_view.ex:37
 msgid "Read Contract"
 msgstr ""
@@ -1867,7 +1868,7 @@ msgstr ""
 #: lib/block_scout_web/templates/address/_tabs.html.eex:14
 #: lib/block_scout_web/templates/address_token/index.html.eex:8
 #: lib/block_scout_web/templates/address_token_transfer/index.html.eex:11
-#: lib/block_scout_web/views/address_view.ex:341
+#: lib/block_scout_web/views/address_view.ex:342
 msgid "Tokens"
 msgstr ""
 
@@ -1879,7 +1880,7 @@ msgstr ""
 #: lib/block_scout_web/templates/block_transaction/index.html.eex:18
 #: lib/block_scout_web/templates/chain/show.html.eex:184
 #: lib/block_scout_web/templates/layout/_topnav.html.eex:50
-#: lib/block_scout_web/views/address_view.ex:342
+#: lib/block_scout_web/views/address_view.ex:343
 msgid "Transactions"
 msgstr ""
 
@@ -1919,13 +1920,13 @@ msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:69
-#: lib/block_scout_web/views/address_view.ex:348
+#: lib/block_scout_web/views/address_view.ex:349
 msgid "Read Proxy"
 msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:76
-#: lib/block_scout_web/views/address_view.ex:349
+#: lib/block_scout_web/views/address_view.ex:350
 msgid "Write Contract"
 msgstr ""
 
@@ -1939,3 +1940,9 @@ msgstr ""
 #: lib/block_scout_web/templates/smart_contract/_functions.html.eex:36
 msgid "Write"
 msgstr ""
+
+#, elixir-format
+#: lib/block_scout_web/templates/address/_tabs.html.eex:83
+#: lib/block_scout_web/views/address_view.ex:351
+msgid "Write Proxy"
+msgstr ""
diff --git a/apps/explorer/lib/explorer/smart_contract/writer.ex b/apps/explorer/lib/explorer/smart_contract/writer.ex
index b340395d14..8fe97d8bc9 100644
--- a/apps/explorer/lib/explorer/smart_contract/writer.ex
+++ b/apps/explorer/lib/explorer/smart_contract/writer.ex
@@ -25,4 +25,27 @@ defmodule Explorer.SmartContract.Writer do
         )
     end
   end
+
+  @spec write_functions_proxy(Hash.t()) :: [%{}]
+  def write_functions_proxy(contract_address_hash) do
+    abi =
+      contract_address_hash
+      |> Chain.address_hash_to_smart_contract()
+      |> Map.get(:abi)
+
+    implementation_abi = Chain.get_implementation_abi_from_proxy(contract_address_hash, abi)
+
+    case implementation_abi do
+      nil ->
+        []
+
+      _ ->
+        implementation_abi
+        |> Enum.filter(
+          &(&1["type"] !== "event" &&
+              (&1["stateMutability"] == "nonpayable" || &1["stateMutability"] == "payable" || &1["payable"] ||
+                 (!&1["payable"] && !&1["constant"] && !&1["stateMutability"])))
+        )
+    end
+  end
 end

From 84471dab9edc07191f86aed537a1b7ade354daae Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Thu, 25 Jun 2020 16:32:41 +0300
Subject: [PATCH 09/34] Fix for definnition of contract type: proxy/regular

---
 apps/block_scout_web/assets/js/lib/smart_contract/functions.js | 3 ++-
 .../templates/smart_contract/_functions.html.eex               | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/apps/block_scout_web/assets/js/lib/smart_contract/functions.js b/apps/block_scout_web/assets/js/lib/smart_contract/functions.js
index 641f416755..8ee173c925 100644
--- a/apps/block_scout_web/assets/js/lib/smart_contract/functions.js
+++ b/apps/block_scout_web/assets/js/lib/smart_contract/functions.js
@@ -35,7 +35,6 @@ const readWriteFunction = (element) => {
 
   $form.on('submit', (event) => {
     const action = $form.data('action')
-    const contractType = $form.data('contract-type')
     event.preventDefault()
 
     if (action === 'read') {
@@ -71,6 +70,8 @@ const readWriteFunction = (element) => {
             const contractAddress = $form.data('contract-address')
             const implementationAbi = $form.data('implementation-abi')
             const parentAbi = $form.data('contract-abi')
+            const $parent = $('[data-smart-contract-functions]')
+            const contractType = $parent.data('type')
             const contractAbi = contractType === 'proxy' ? implementationAbi : parentAbi
 
             window.web3.eth.getChainId()
diff --git a/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex b/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex
index cd2a0d5e9f..9570f4a418 100644
--- a/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex
+++ b/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex
@@ -16,7 +16,7 @@
           end
         %>
         <%= render BlockScoutWeb.SmartContractView, "_pending_contract_write.html" %>
-        <form class="form-inline" data-function-form data-action="<%= if writeable?(function), do: :write, else: :read %>" data-contract-type="<%= @contract_type %>" data-url="<%= smart_contract_path(@conn, :show, @address.hash) %>" data-contract-address="<%= @address.hash %>" data-contract-abi="<%= @contract_abi %>" data-implementation-abi="<%= @implementation_abi  %>" data-chain-id="<%= Explorer.Chain.Cache.NetVersion.get_version() %>">
+        <form class="form-inline" data-function-form data-action="<%= if writeable?(function), do: :write, else: :read %>" data-type="<%= @contract_type %>" data-url="<%= smart_contract_path(@conn, :show, @address.hash) %>" data-contract-address="<%= @address.hash %>" data-contract-abi="<%= @contract_abi %>" data-implementation-abi="<%= @implementation_abi  %>" data-chain-id="<%= Explorer.Chain.Cache.NetVersion.get_version() %>">
           <input type="hidden" name="function_name" value='<%= function["name"] %>' />
 
           <%= if queryable?(function["inputs"]) do %>

From 68b244dfb78f1a61db1aecd9699ac0965b609f34 Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Thu, 25 Jun 2020 19:04:23 +0300
Subject: [PATCH 10/34] Write proxy: remove redundant variable declaration:
 contract_type

---
 .../block_scout_web/controllers/smart_contract_controller.ex    | 2 --
 1 file changed, 2 deletions(-)

diff --git a/apps/block_scout_web/lib/block_scout_web/controllers/smart_contract_controller.ex b/apps/block_scout_web/lib/block_scout_web/controllers/smart_contract_controller.ex
index 06fd117470..604d8cab00 100644
--- a/apps/block_scout_web/lib/block_scout_web/controllers/smart_contract_controller.ex
+++ b/apps/block_scout_web/lib/block_scout_web/controllers/smart_contract_controller.ex
@@ -40,8 +40,6 @@ defmodule BlockScoutWeb.SmartContractController do
           []
         end
 
-      contract_type = if Chain.is_proxy_contract?(address.smart_contract.abi), do: :proxy, else: :regular
-
       conn
       |> put_status(200)
       |> put_layout(false)

From 1f8bda8a377035592d71d696603f42c1399261e4 Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Mon, 29 Jun 2020 11:22:02 +0300
Subject: [PATCH 11/34] Fix for acocunts page with token-bridge supply and
 inexistent bridge contracts

---
 .../lib/explorer/chain/supply/token_bridge.ex | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

diff --git a/apps/explorer/lib/explorer/chain/supply/token_bridge.ex b/apps/explorer/lib/explorer/chain/supply/token_bridge.ex
index 14e7a0a6e1..42ed6c2201 100644
--- a/apps/explorer/lib/explorer/chain/supply/token_bridge.ex
+++ b/apps/explorer/lib/explorer/chain/supply/token_bridge.ex
@@ -85,12 +85,6 @@ defmodule Explorer.Chain.Supply.TokenBridge do
       |> Enum.map(fn {key, _value} -> key end)
       |> List.first()
 
-    value =
-      case Reader.query_contract(address, abi, params) do
-        %{^method_name => {:ok, [result]}} -> result
-        _ -> 0
-      end
-
     type =
       abi
       |> Enum.at(0)
@@ -98,6 +92,19 @@ defmodule Explorer.Chain.Supply.TokenBridge do
       |> Enum.at(0)
       |> Map.get("type", "")
 
+    value =
+      case Reader.query_contract(address, abi, params) do
+        %{^method_name => {:ok, [result]}} ->
+          result
+
+        _ ->
+          case type do
+            "address" -> "0x0000000000000000000000000000000000000000"
+            "uint256" -> 0
+            _ -> 0
+          end
+      end
+
     case type do
       "address" ->
         "0x" <> Base.encode16(value)

From 5cdaa75ac9540901e0c9fc6088493815252aad6c Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Mon, 29 Jun 2020 11:28:48 +0300
Subject: [PATCH 12/34] Add Changelog entry

---
 CHANGELOG.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 177901e0ed..64e56137dc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@
 - [#3157](https://github.com/poanetwork/blockscout/pull/3157) - Read methods of implementation on proxy contract
 
 ### Fixes
+- [#3168](https://github.com/poanetwork/blockscout/pull/3168) - Eliminate internal server error at /accounts page with token-bridge type of supply and inexistent bridge contracts
 
 ### Chore
 

From d82b48f924cf091e9a7c60a35e6eb0cbb91f1ae9 Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Mon, 29 Jun 2020 12:10:16 +0300
Subject: [PATCH 13/34] Fix for verification of contracts from genesis block

---
 .../explorer/lib/explorer/smart_contract/verifier.ex | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/apps/explorer/lib/explorer/smart_contract/verifier.ex b/apps/explorer/lib/explorer/smart_contract/verifier.ex
index 1b4eb88a3e..439f8f9757 100644
--- a/apps/explorer/lib/explorer/smart_contract/verifier.ex
+++ b/apps/explorer/lib/explorer/smart_contract/verifier.ex
@@ -90,9 +90,15 @@ defmodule Explorer.SmartContract.Verifier do
       "compiler_version" => generated_compiler_version
     } = extract_bytecode_and_metadata_hash(bytecode)
 
-    "0x" <> blockchain_created_tx_input =
-      address_hash
-      |> Chain.smart_contract_creation_tx_bytecode()
+    blockchain_created_tx_input =
+      case Chain.smart_contract_creation_tx_bytecode(address_hash) do
+        nil ->
+          bytecode
+
+        blockchain_created_tx_input_with_0x ->
+          "0x" <> blockchain_created_tx_input = blockchain_created_tx_input_with_0x
+          blockchain_created_tx_input
+      end
 
     %{
       "metadata_hash" => _metadata_hash,

From 4607cd79547c89927aee5301b189d4c586c7d221 Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Mon, 29 Jun 2020 12:49:53 +0300
Subject: [PATCH 14/34] Add CHANGELOG entry

---
 CHANGELOG.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 177901e0ed..c262929481 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@
 - [#3157](https://github.com/poanetwork/blockscout/pull/3157) - Read methods of implementation on proxy contract
 
 ### Fixes
+- [#3169](https://github.com/poanetwork/blockscout/pull/3169) - Fix for verification of contracts from genesis block
 
 ### Chore
 

From 2842f2405e0efd7751d624076752672cf8b783dd Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Mon, 29 Jun 2020 13:28:30 +0300
Subject: [PATCH 15/34] Import accounts from Geth geenesis

---
 .../lib/explorer/chain_spec/genesis_data.ex   | 18 +++-
 .../lib/explorer/chain_spec/geth/importer.ex  | 93 +++++++++++++++++++
 .../explorer/chain_spec/parity/importer.ex    |  3 +-
 3 files changed, 111 insertions(+), 3 deletions(-)
 create mode 100644 apps/explorer/lib/explorer/chain_spec/geth/importer.ex

diff --git a/apps/explorer/lib/explorer/chain_spec/genesis_data.ex b/apps/explorer/lib/explorer/chain_spec/genesis_data.ex
index 895d447667..02fd01c4b8 100644
--- a/apps/explorer/lib/explorer/chain_spec/genesis_data.ex
+++ b/apps/explorer/lib/explorer/chain_spec/genesis_data.ex
@@ -7,6 +7,7 @@ defmodule Explorer.ChainSpec.GenesisData do
 
   require Logger
 
+  alias Explorer.ChainSpec.Geth.Importer, as: GethImporter
   alias Explorer.ChainSpec.Parity.Importer
   alias HTTPoison.Response
 
@@ -58,11 +59,24 @@ defmodule Explorer.ChainSpec.GenesisData do
     path = Application.get_env(:explorer, __MODULE__)[:chain_spec_path]
 
     if path do
+      json_rpc_named_arguments = Application.fetch_env!(:indexer, :json_rpc_named_arguments)
+      variant = Keyword.fetch!(json_rpc_named_arguments, :variant)
+
       Task.Supervisor.async_nolink(Explorer.GenesisDataTaskSupervisor, fn ->
         case fetch_spec(path) do
           {:ok, chain_spec} ->
-            Importer.import_emission_rewards(chain_spec)
-            {:ok, _} = Importer.import_genesis_accounts(chain_spec)
+            case variant do
+              EthereumJSONRPC.Parity ->
+                Importer.import_emission_rewards(chain_spec)
+                {:ok, _} = Importer.import_genesis_accounts(chain_spec)
+
+              EthereumJSONRPC.Geth ->
+                {:ok, _} = GethImporter.import_genesis_accounts(chain_spec)
+
+              _ ->
+                Importer.import_emission_rewards(chain_spec)
+                {:ok, _} = Importer.import_genesis_accounts(chain_spec)
+            end
 
           {:error, reason} ->
             Logger.warn(fn -> "Failed to fetch genesis data. #{inspect(reason)}" end)
diff --git a/apps/explorer/lib/explorer/chain_spec/geth/importer.ex b/apps/explorer/lib/explorer/chain_spec/geth/importer.ex
new file mode 100644
index 0000000000..be46375064
--- /dev/null
+++ b/apps/explorer/lib/explorer/chain_spec/geth/importer.ex
@@ -0,0 +1,93 @@
+# credo:disable-for-this-file
+defmodule Explorer.ChainSpec.Geth.Importer do
+  @moduledoc """
+  Imports data from Geth genesis.json.
+  """
+
+  require Logger
+
+  alias EthereumJSONRPC.Blocks
+  alias Explorer.Chain
+  alias Explorer.Chain.Hash.Address, as: AddressHash
+
+  def import_genesis_accounts(chain_spec) do
+    balance_params =
+      chain_spec
+      |> genesis_accounts()
+      |> Stream.map(fn balance_map ->
+        Map.put(balance_map, :block_number, 0)
+      end)
+      |> Enum.to_list()
+
+    json_rpc_named_arguments = Application.get_env(:explorer, :json_rpc_named_arguments)
+
+    {:ok, %Blocks{blocks_params: [%{timestamp: timestamp}]}} =
+      EthereumJSONRPC.fetch_blocks_by_range(1..1, json_rpc_named_arguments)
+
+    day = DateTime.to_date(timestamp)
+
+    balance_daily_params =
+      chain_spec
+      |> genesis_accounts()
+      |> Stream.map(fn balance_map ->
+        Map.put(balance_map, :day, day)
+      end)
+      |> Enum.to_list()
+
+    address_params =
+      balance_params
+      |> Stream.map(fn %{address_hash: hash} = map ->
+        Map.put(map, :hash, hash)
+      end)
+      |> Enum.to_list()
+
+    params = %{
+      address_coin_balances: %{params: balance_params},
+      address_coin_balances_daily: %{params: balance_daily_params},
+      addresses: %{params: address_params}
+    }
+
+    Chain.import(params)
+  end
+
+  def genesis_accounts(chain_spec) do
+    accounts = chain_spec["alloc"]
+
+    if accounts do
+      parse_accounts(accounts)
+    else
+      Logger.warn(fn -> "No accounts are defined in genesis" end)
+
+      []
+    end
+  end
+
+  defp parse_accounts(accounts) do
+    accounts
+    |> Stream.filter(fn {_address, map} ->
+      !is_nil(map["balance"])
+    end)
+    |> Stream.map(fn {address, %{"balance" => value} = params} ->
+      formatted_address = if String.starts_with?(address, "0x"), do: address, else: "0x" <> address
+      {:ok, address_hash} = AddressHash.cast(formatted_address)
+      balance = parse_number(value)
+
+      code = params["code"]
+
+      %{address_hash: address_hash, value: balance, contract_code: code}
+    end)
+    |> Enum.to_list()
+  end
+
+  defp parse_number("0x" <> hex_number) do
+    {number, ""} = Integer.parse(hex_number, 16)
+
+    number
+  end
+
+  defp parse_number(string_number) do
+    {number, ""} = Integer.parse(string_number, 10)
+
+    number
+  end
+end
diff --git a/apps/explorer/lib/explorer/chain_spec/parity/importer.ex b/apps/explorer/lib/explorer/chain_spec/parity/importer.ex
index cdd2da1eed..d4d2ad69df 100644
--- a/apps/explorer/lib/explorer/chain_spec/parity/importer.ex
+++ b/apps/explorer/lib/explorer/chain_spec/parity/importer.ex
@@ -1,6 +1,7 @@
+# credo:disable-for-this-file
 defmodule Explorer.ChainSpec.Parity.Importer do
   @moduledoc """
-  Imports data from parity chain spec.
+  Imports data from Parity/Open Ethereum chain spec.
   """
 
   require Logger

From c10d1a30c089b423676b85dd5a087645743cfbc9 Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Mon, 29 Jun 2020 14:13:37 +0300
Subject: [PATCH 16/34] Update CHANGELOG entry

---
 CHANGELOG.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index c262929481..2df632a36a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,7 @@
 - [#3157](https://github.com/poanetwork/blockscout/pull/3157) - Read methods of implementation on proxy contract
 
 ### Fixes
-- [#3169](https://github.com/poanetwork/blockscout/pull/3169) - Fix for verification of contracts from genesis block
+- [#3169](https://github.com/poanetwork/blockscout/pull/3169) - Fix for verification of contracts defined in genesis block
 
 ### Chore
 

From da8aaaf53eab2840c09672a764d9e9a006e69efb Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Mon, 29 Jun 2020 16:20:19 +0300
Subject: [PATCH 17/34] Add tests

---
 CHANGELOG.md                                  |   1 +
 .../chain_spec/geth/importer_test.exs         | 145 ++++++++++++++++++
 .../fixture/chain_spec/qdai_genesis.json      |  53 +++++++
 3 files changed, 199 insertions(+)
 create mode 100644 apps/explorer/test/explorer/chain_spec/geth/importer_test.exs
 create mode 100644 apps/explorer/test/support/fixture/chain_spec/qdai_genesis.json

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 64e56137dc..9660bee534 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
 ## Current
 
 ### Features
+- [#3171](https://github.com/poanetwork/blockscout/pull/3171) - Import accounts/contracts/balances from Geth genesis.json
 - [#3157](https://github.com/poanetwork/blockscout/pull/3157) - Read methods of implementation on proxy contract
 
 ### Fixes
diff --git a/apps/explorer/test/explorer/chain_spec/geth/importer_test.exs b/apps/explorer/test/explorer/chain_spec/geth/importer_test.exs
new file mode 100644
index 0000000000..36eebf24a7
--- /dev/null
+++ b/apps/explorer/test/explorer/chain_spec/geth/importer_test.exs
@@ -0,0 +1,145 @@
+defmodule Explorer.ChainSpec.Geth.ImporterTest do
+  use Explorer.DataCase
+
+  import Mox
+  import EthereumJSONRPC, only: [integer_to_quantity: 1]
+
+  alias Explorer.Chain.Address.{CoinBalance, CoinBalanceDaily}
+  alias Explorer.Chain.{Address, Hash}
+  alias Explorer.ChainSpec.Geth.Importer
+  alias Explorer.Repo
+
+  setup :set_mox_global
+
+  @genesis "#{File.cwd!()}/test/support/fixture/chain_spec/qdai_genesis.json"
+           |> File.read!()
+           |> Jason.decode!()
+
+  describe "genesis_accounts/1" do
+    test "parses coin balance and contract code" do
+      coin_balances = Importer.genesis_accounts(@genesis)
+
+      assert Enum.count(coin_balances) == 3
+
+      assert %{
+               address_hash: %Hash{
+                 byte_count: 20,
+                 bytes: <<0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 255, 254>>
+               },
+               value: 0,
+               contract_code:
+                 "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+             } ==
+               List.first(coin_balances)
+    end
+  end
+
+  describe "import_genesis_accounts/1" do
+    test "imports accounts" do
+      block_quantity = integer_to_quantity(1)
+      res = eth_block_number_fake_response(block_quantity)
+
+      EthereumJSONRPC.Mox
+      |> expect(:json_rpc, fn [
+                                %{id: 0, jsonrpc: "2.0", method: "eth_getBlockByNumber", params: ["0x1", true]}
+                              ],
+                              _ ->
+        {:ok, [res]}
+      end)
+
+      {:ok, %{address_coin_balances: address_coin_balances}} = Importer.import_genesis_accounts(@genesis)
+
+      assert Enum.count(address_coin_balances) == 3
+      assert CoinBalance |> Repo.all() |> Enum.count() == 3
+      assert CoinBalanceDaily |> Repo.all() |> Enum.count() == 3
+      assert Address |> Repo.all() |> Enum.count() == 3
+    end
+
+    test "imports contract code" do
+      block_quantity = integer_to_quantity(1)
+      res = eth_block_number_fake_response(block_quantity)
+
+      EthereumJSONRPC.Mox
+      |> expect(:json_rpc, fn [
+                                %{id: 0, jsonrpc: "2.0", method: "eth_getBlockByNumber", params: ["0x1", true]}
+                              ],
+                              [] ->
+        {:ok, [res]}
+      end)
+
+      code =
+        "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"
+
+      chain_spec = %{
+        "alloc" => %{
+          "0xcd59f3dde77e09940befb6ee58031965cae7a336" => %{
+            "balance" => "0x21e19e0c9bab2400000",
+            "code" => code
+          }
+        }
+      }
+
+      {:ok, _} = Importer.import_genesis_accounts(chain_spec)
+
+      address = Address |> Repo.one()
+
+      assert to_string(address.contract_code) == code
+    end
+
+    test "imports coin balances without 0x" do
+      block_quantity = integer_to_quantity(1)
+      res = eth_block_number_fake_response(block_quantity)
+
+      EthereumJSONRPC.Mox
+      |> expect(:json_rpc, fn [
+                                %{id: 0, jsonrpc: "2.0", method: "eth_getBlockByNumber", params: ["0x1", true]}
+                              ],
+                              [] ->
+        {:ok, [res]}
+      end)
+
+      {:ok, %{address_coin_balances: address_coin_balances}} = Importer.import_genesis_accounts(@genesis)
+
+      assert Enum.count(address_coin_balances) == 3
+      assert CoinBalance |> Repo.all() |> Enum.count() == 3
+      assert CoinBalanceDaily |> Repo.all() |> Enum.count() == 3
+      assert Address |> Repo.all() |> Enum.count() == 3
+    end
+  end
+
+  defp eth_block_number_fake_response(block_quantity) do
+    %{
+      id: 0,
+      jsonrpc: "2.0",
+      result: %{
+        "author" => "0x0000000000000000000000000000000000000000",
+        "difficulty" => "0x20000",
+        "extraData" => "0x",
+        "gasLimit" => "0x663be0",
+        "gasUsed" => "0x0",
+        "hash" => "0x5b28c1bfd3a15230c9a46b399cd0f9a6920d432e85381cc6a140b06e8410112f",
+        "logsBloom" =>
+          "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
+        "miner" => "0x0000000000000000000000000000000000000000",
+        "number" => block_quantity,
+        "parentHash" => "0x0000000000000000000000000000000000000000000000000000000000000000",
+        "receiptsRoot" => "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
+        "sealFields" => [
+          "0x80",
+          "0xb8410000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
+        ],
+        "sha3Uncles" => "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
+        "signature" =>
+          "0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
+        "size" => "0x215",
+        "stateRoot" => "0xfad4af258fd11939fae0c6c6eec9d340b1caac0b0196fd9a1bc3f489c5bf00b3",
+        "step" => "0",
+        "timestamp" => "0x0",
+        "totalDifficulty" => "0x20000",
+        "transactions" => [],
+        "transactionsRoot" => "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
+        "uncles" => []
+      }
+    }
+  end
+end
diff --git a/apps/explorer/test/support/fixture/chain_spec/qdai_genesis.json b/apps/explorer/test/support/fixture/chain_spec/qdai_genesis.json
new file mode 100644
index 0000000000..893557611b
--- /dev/null
+++ b/apps/explorer/test/support/fixture/chain_spec/qdai_genesis.json
@@ -0,0 +1,53 @@
+{
+    "config": {
+        "chainId": 181,
+        "eip150Block": 0,
+        "eip150Hash": "0x0000000000000000000000000000000000000000000000000000000000000000",
+        "eip155Block": 0,
+        "eip158Block": 0,
+        "homesteadBlock": 0,
+        "byzantiumBlock": 0,
+        "constantinopleBlock": 0,
+        "petersburgBlock": 0,
+        "istanbulBlock": 0,
+        "istanbul": {
+            "epoch": 30000,
+            "policy": 0,
+            "ceil2Nby3Block": 0
+        },
+        "maxCodeSizeConfig": [
+            {
+                "block": 0,
+                "size": 35
+            }
+        ],
+        "isQuorum": true,
+        "txnSizeLimit": 64,
+	"blockRewardConfig": {
+            "contract": "0x000000000000000000000000000000000000ffff"
+	}
+    },
+    "nonce": "0x0",
+    "timestamp": "0x5ef3b16e",
+    "extraData": "0x0000000000000000000000000000000000000000000000000000000000000000f85ad5944cca306665b4249e7964c7dbfb136627eccc0268b8410000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000c0",
+    "gasLimit": "0xbebc20",
+    "difficulty": "0x1",
+    "mixHash": "0x63746963616c2062797a616e74696e65206661756c7420746f6c6572616e6365",
+    "coinbase": "0x0000000000000000000000000000000000000000",
+    "alloc": {
+        "4cca306665b4249e7964c7dbfb136627eccc0268": {
+            "balance": "0x0"
+        },
+	"000000000000000000000000000000000000fffe": {
+	    "code": "0x6080604052600436106100cf5763ffffffff7c01000000000000000000000000000000000000000000000000000000006000350416630f3a053381146100d457806310f2ee7c146101075780632ee57f8d1461011c57806330f6eb16146101665780633d84b8c11461018a5780634476d66a146101ab578063553a5c85146101c3578063899ca7fc146101d8578063aa9fa27414610225578063b4a523e81461024b578063db456f771461026c578063e73b9e2f146102a0578063efdc4d01146102c1578063f91c2898146102d6575b600080fd5b3480156100e057600080fd5b506100f5600160a060020a036004351661039b565b60408051918252519081900360200190f35b34801561011357600080fd5b506100f5610464565b34801561012857600080fd5b50610131610469565b604080517fffffffff000000000000000000000000000000000000000000000000000000009092168252519081900360200190f35b34801561017257600080fd5b506100f5600160a060020a036004351660243561049e565b34801561019657600080fd5b506100f5600160a060020a0360043516610570565b3480156101b757600080fd5b506100f56004356105f7565b3480156101cf57600080fd5b506100f561066f565b3480156101e457600080fd5b506101ed6106bd565b6040518082602080838360005b838110156102125781810151838201526020016101fa565b5050505090500191505060405180910390f35b34801561023157600080fd5b50610249600435600160a060020a03602435166106eb565b005b34801561025757600080fd5b506100f5600160a060020a03600435166107bd565b34801561027857600080fd5b50610284600435610844565b60408051600160a060020a039092168252519081900360200190f35b3480156102ac57600080fd5b506100f5600160a060020a0360043516610908565b3480156102cd57600080fd5b506100f561098f565b3480156102e257600080fd5b5061030260246004803582810192908201359181359182019101356109dd565b604051808060200180602001838103835285818151815260200191508051906020019060200280838360005b8381101561034657818101518382015260200161032e565b50505050905001838103825284818151815260200191508051906020019060200280838360005b8381101561038557818101518382015260200161036d565b5050505090500194505050505060405180910390f35b604080517f0f09dbb26898a3af738d25c5fff308337ac8f2b0acbbaf209b373fb1389bcf2f602080830191909152606060020a600160a060020a038516028284015282516034818403018152605490920192839052815160009384938493909282918401908083835b602083106104235780518252601f199092019160209182019101610404565b51815160209384036101000a600019018019909216911617905260408051929094018290039091208652850195909552929092016000205495945050505050565b600181565b604080517f626c6f636b5265776172640000000000000000000000000000000000000000008152905190819003600b01902090565b604080517f24ae442c1f305c4f1294bf2dddd491a64250b2818b446706e9a74aeaaaf6f419602080830191909152606060020a600160a060020a0386160282840152605480830185905283518084039091018152607490920192839052815160009384938493909282918401908083835b6020831061052e5780518252601f19909201916020918201910161050f565b51815160209384036101000a60001901801990921691161790526040805192909401829003909120865285019590955292909201600020549695505050505050565b604080517f0fd3be07b1332be84678873bf53feb10604cd09244fb4bb9154e03e00709b9e7602080830191909152606060020a600160a060020a03851602828401528251603481840301815260549092019283905281516000938493849390928291840190808383602083106104235780518252601f199092019160209182019101610404565b604080517f3840e646f7ce9b3210f5440e2dbd6b36451169bfdac65ef00a161729eded81bd60208083019190915281830184905282518083038401815260609092019283905281516000938493849390928291840190808383602083106104235780518252601f199092019160209182019101610404565b7f076e79ca1c3a46f0c7d1e9e7f14bcb9716bfc49eed37baf510328301a7109c2560009081526020527fec9588bd3242595c0e33049f6384a658ee56f04f9b9e85c6cc9a045c4948c9515490565b6106c56112f3565b50604080516020810190915273bf3d6f830ce263cae987193982192cd990442b53815290565b60006106f633610baf565b151561070157600080fd5b82151561070d57600080fd5b600160a060020a038216151561072257600080fd5b61072b8261039b565b905080151561073d5761073d82610c1a565b610756610750828563ffffffff610d5716565b83610d6a565b6107786107728461076633610908565b9063ffffffff610d5716565b33610e34565b6040805184815290513391600160a060020a038516917f3c798bbcf33115b42c728b8504cff11dd58736e9fa789f1cda2738db7d696b2a9181900360200190a3505050565b604080517f12e71282a577e2b463da2c18bc96b6122db29bcef9065ed5a7f0f9316c11c08e602080830191909152606060020a600160a060020a03851602828401528251603481840301815260549092019283905281516000938493849390928291840190808383602083106104235780518252601f199092019160209182019101610404565b604080517fa47da669ec9f3749fbb12db00588b5fa6b5bbd24da81eb6cab44261334c21c1760208083019190915281830184905282518083038401815260609092019283905281516000936002938593909282918401908083835b602083106108be5780518252601f19909201916020918201910161089f565b51815160209384036101000a6000190180199092169116179052604080519290940182900390912086528501959095529290920160002054600160a060020a031695945050505050565b604080517fa7f48dc57b1a051b1732e5ed136bbfd33bb5aa418e3e3498901320529e785461602080830191909152606060020a600160a060020a03851602828401528251603481840301815260549092019283905281516000938493849390928291840190808383602083106104235780518252601f199092019160209182019101610404565b7f0678259008a66390de8a5ac3f500d1dfb0d0f57018441e2cc69aaa0f52c97d4460009081526020527f3f9dbe5402519a8ea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+	    "balance": "0x0"
+	},
+	"000000000000000000000000000000000000ffff": {
+	    "code": "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",
+	    "balance": "0x0"
+	}
+    },
+    "number": "0x0",
+    "gasUsed": "0x0",
+    "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000"
+}

From ed3089322661a685b6d164e65650aa0f9d6f7afd Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Mon, 29 Jun 2020 14:09:50 +0300
Subject: [PATCH 18/34] Exclude constructors from Write contract page

---
 .../lib/block_scout_web/views/address_view.ex |  5 ++-
 apps/block_scout_web/priv/gettext/default.pot | 36 +++++++++----------
 .../priv/gettext/en/LC_MESSAGES/default.po    | 36 +++++++++----------
 .../lib/explorer/smart_contract/writer.ex     | 31 ++++++++++------
 4 files changed, 59 insertions(+), 49 deletions(-)

diff --git a/apps/block_scout_web/lib/block_scout_web/views/address_view.ex b/apps/block_scout_web/lib/block_scout_web/views/address_view.ex
index 0e38ba6654..3724c248fe 100644
--- a/apps/block_scout_web/lib/block_scout_web/views/address_view.ex
+++ b/apps/block_scout_web/lib/block_scout_web/views/address_view.ex
@@ -8,6 +8,7 @@ defmodule BlockScoutWeb.AddressView do
   alias Explorer.Chain.{Address, Hash, InternalTransaction, SmartContract, Token, TokenTransfer, Transaction, Wei}
   alias Explorer.Chain.Block.Reward
   alias Explorer.ExchangeRates.Token, as: TokenExchangeRate
+  alias Explorer.SmartContract.Writer
 
   @dialyzer :no_match
 
@@ -240,9 +241,7 @@ defmodule BlockScoutWeb.AddressView do
   def smart_contract_with_write_functions?(%Address{smart_contract: %SmartContract{}} = address) do
     Enum.any?(
       address.smart_contract.abi,
-      &(&1["type"] !== "event" &&
-          (&1["stateMutability"] == "nonpayable" || &1["stateMutability"] == "payable" || &1["payable"] ||
-             (!&1["payable"] && !&1["constant"] && !&1["stateMutability"])))
+      &Writer.write_function?(&1)
     )
   end
 
diff --git a/apps/block_scout_web/priv/gettext/default.pot b/apps/block_scout_web/priv/gettext/default.pot
index 8963d56fd0..da842aab61 100644
--- a/apps/block_scout_web/priv/gettext/default.pot
+++ b/apps/block_scout_web/priv/gettext/default.pot
@@ -124,7 +124,7 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/address/_validator_metadata_modal.html.eex:16
 #: lib/block_scout_web/templates/transaction_log/_logs.html.eex:19
-#: lib/block_scout_web/views/address_view.ex:103
+#: lib/block_scout_web/views/address_view.ex:104
 msgid "Address"
 msgstr ""
 
@@ -338,14 +338,14 @@ msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address_contract_verification/new.html.eex:18
-#: lib/block_scout_web/views/address_view.ex:101
+#: lib/block_scout_web/views/address_view.ex:102
 msgid "Contract Address"
 msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/transaction/_pending_tile.html.eex:16
-#: lib/block_scout_web/views/address_view.ex:41
-#: lib/block_scout_web/views/address_view.ex:75
+#: lib/block_scout_web/views/address_view.ex:42
+#: lib/block_scout_web/views/address_view.ex:76
 msgid "Contract Address Pending"
 msgstr ""
 
@@ -904,7 +904,7 @@ msgstr ""
 #: lib/block_scout_web/templates/tokens/transfer/index.html.eex:14
 #: lib/block_scout_web/templates/transaction/_tabs.html.eex:4
 #: lib/block_scout_web/templates/transaction_token_transfer/index.html.eex:7
-#: lib/block_scout_web/views/address_view.ex:345
+#: lib/block_scout_web/views/address_view.ex:344
 #: lib/block_scout_web/views/tokens/instance/overview_view.ex:98
 #: lib/block_scout_web/views/tokens/overview_view.ex:35
 #: lib/block_scout_web/views/transaction_view.ex:394
@@ -1045,7 +1045,7 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/chain/show.html.eex:52
 #: lib/block_scout_web/templates/layout/app.html.eex:30
-#: lib/block_scout_web/views/address_view.ex:141
+#: lib/block_scout_web/views/address_view.ex:142
 msgid "Market Cap"
 msgstr ""
 
@@ -1811,7 +1811,7 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:37
 #: lib/block_scout_web/templates/address_validation/index.html.eex:13
-#: lib/block_scout_web/views/address_view.ex:353
+#: lib/block_scout_web/views/address_view.ex:352
 msgid "Blocks Validated"
 msgstr ""
 
@@ -1821,18 +1821,18 @@ msgstr ""
 #: lib/block_scout_web/templates/api_docs/_action_tile.html.eex:187
 #: lib/block_scout_web/templates/api_docs/_eth_rpc_item.html.eex:126
 #: lib/block_scout_web/templates/api_docs/_eth_rpc_item.html.eex:149
-#: lib/block_scout_web/views/address_view.ex:346
+#: lib/block_scout_web/views/address_view.ex:345
 msgid "Code"
 msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:26
-#: lib/block_scout_web/views/address_view.ex:352
+#: lib/block_scout_web/views/address_view.ex:351
 msgid "Coin Balance History"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/views/address_view.ex:347
+#: lib/block_scout_web/views/address_view.ex:346
 msgid "Decompiled Code"
 msgstr ""
 
@@ -1841,7 +1841,7 @@ msgstr ""
 #: lib/block_scout_web/templates/address_internal_transaction/index.html.eex:19
 #: lib/block_scout_web/templates/transaction/_tabs.html.eex:11
 #: lib/block_scout_web/templates/transaction_internal_transaction/index.html.eex:6
-#: lib/block_scout_web/views/address_view.ex:344
+#: lib/block_scout_web/views/address_view.ex:343
 #: lib/block_scout_web/views/transaction_view.ex:395
 msgid "Internal Transactions"
 msgstr ""
@@ -1851,7 +1851,7 @@ msgstr ""
 #: lib/block_scout_web/templates/address_logs/index.html.eex:8
 #: lib/block_scout_web/templates/transaction/_tabs.html.eex:17
 #: lib/block_scout_web/templates/transaction_log/index.html.eex:8
-#: lib/block_scout_web/views/address_view.ex:354
+#: lib/block_scout_web/views/address_view.ex:353
 #: lib/block_scout_web/views/transaction_view.ex:396
 msgid "Logs"
 msgstr ""
@@ -1859,7 +1859,7 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:62
 #: lib/block_scout_web/templates/tokens/overview/_tabs.html.eex:25
-#: lib/block_scout_web/views/address_view.ex:348
+#: lib/block_scout_web/views/address_view.ex:347
 #: lib/block_scout_web/views/tokens/overview_view.ex:37
 msgid "Read Contract"
 msgstr ""
@@ -1868,7 +1868,7 @@ msgstr ""
 #: lib/block_scout_web/templates/address/_tabs.html.eex:14
 #: lib/block_scout_web/templates/address_token/index.html.eex:8
 #: lib/block_scout_web/templates/address_token_transfer/index.html.eex:11
-#: lib/block_scout_web/views/address_view.ex:342
+#: lib/block_scout_web/views/address_view.ex:341
 msgid "Tokens"
 msgstr ""
 
@@ -1880,7 +1880,7 @@ msgstr ""
 #: lib/block_scout_web/templates/block_transaction/index.html.eex:18
 #: lib/block_scout_web/templates/chain/show.html.eex:184
 #: lib/block_scout_web/templates/layout/_topnav.html.eex:50
-#: lib/block_scout_web/views/address_view.ex:343
+#: lib/block_scout_web/views/address_view.ex:342
 msgid "Transactions"
 msgstr ""
 
@@ -1920,13 +1920,13 @@ msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:69
-#: lib/block_scout_web/views/address_view.ex:349
+#: lib/block_scout_web/views/address_view.ex:348
 msgid "Read Proxy"
 msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:76
-#: lib/block_scout_web/views/address_view.ex:350
+#: lib/block_scout_web/views/address_view.ex:349
 msgid "Write Contract"
 msgstr ""
 
@@ -1943,6 +1943,6 @@ msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:83
-#: lib/block_scout_web/views/address_view.ex:351
+#: lib/block_scout_web/views/address_view.ex:350
 msgid "Write Proxy"
 msgstr ""
diff --git a/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po b/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po
index 8963d56fd0..da842aab61 100644
--- a/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po
+++ b/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po
@@ -124,7 +124,7 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/address/_validator_metadata_modal.html.eex:16
 #: lib/block_scout_web/templates/transaction_log/_logs.html.eex:19
-#: lib/block_scout_web/views/address_view.ex:103
+#: lib/block_scout_web/views/address_view.ex:104
 msgid "Address"
 msgstr ""
 
@@ -338,14 +338,14 @@ msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address_contract_verification/new.html.eex:18
-#: lib/block_scout_web/views/address_view.ex:101
+#: lib/block_scout_web/views/address_view.ex:102
 msgid "Contract Address"
 msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/transaction/_pending_tile.html.eex:16
-#: lib/block_scout_web/views/address_view.ex:41
-#: lib/block_scout_web/views/address_view.ex:75
+#: lib/block_scout_web/views/address_view.ex:42
+#: lib/block_scout_web/views/address_view.ex:76
 msgid "Contract Address Pending"
 msgstr ""
 
@@ -904,7 +904,7 @@ msgstr ""
 #: lib/block_scout_web/templates/tokens/transfer/index.html.eex:14
 #: lib/block_scout_web/templates/transaction/_tabs.html.eex:4
 #: lib/block_scout_web/templates/transaction_token_transfer/index.html.eex:7
-#: lib/block_scout_web/views/address_view.ex:345
+#: lib/block_scout_web/views/address_view.ex:344
 #: lib/block_scout_web/views/tokens/instance/overview_view.ex:98
 #: lib/block_scout_web/views/tokens/overview_view.ex:35
 #: lib/block_scout_web/views/transaction_view.ex:394
@@ -1045,7 +1045,7 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/chain/show.html.eex:52
 #: lib/block_scout_web/templates/layout/app.html.eex:30
-#: lib/block_scout_web/views/address_view.ex:141
+#: lib/block_scout_web/views/address_view.ex:142
 msgid "Market Cap"
 msgstr ""
 
@@ -1811,7 +1811,7 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:37
 #: lib/block_scout_web/templates/address_validation/index.html.eex:13
-#: lib/block_scout_web/views/address_view.ex:353
+#: lib/block_scout_web/views/address_view.ex:352
 msgid "Blocks Validated"
 msgstr ""
 
@@ -1821,18 +1821,18 @@ msgstr ""
 #: lib/block_scout_web/templates/api_docs/_action_tile.html.eex:187
 #: lib/block_scout_web/templates/api_docs/_eth_rpc_item.html.eex:126
 #: lib/block_scout_web/templates/api_docs/_eth_rpc_item.html.eex:149
-#: lib/block_scout_web/views/address_view.ex:346
+#: lib/block_scout_web/views/address_view.ex:345
 msgid "Code"
 msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:26
-#: lib/block_scout_web/views/address_view.ex:352
+#: lib/block_scout_web/views/address_view.ex:351
 msgid "Coin Balance History"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/views/address_view.ex:347
+#: lib/block_scout_web/views/address_view.ex:346
 msgid "Decompiled Code"
 msgstr ""
 
@@ -1841,7 +1841,7 @@ msgstr ""
 #: lib/block_scout_web/templates/address_internal_transaction/index.html.eex:19
 #: lib/block_scout_web/templates/transaction/_tabs.html.eex:11
 #: lib/block_scout_web/templates/transaction_internal_transaction/index.html.eex:6
-#: lib/block_scout_web/views/address_view.ex:344
+#: lib/block_scout_web/views/address_view.ex:343
 #: lib/block_scout_web/views/transaction_view.ex:395
 msgid "Internal Transactions"
 msgstr ""
@@ -1851,7 +1851,7 @@ msgstr ""
 #: lib/block_scout_web/templates/address_logs/index.html.eex:8
 #: lib/block_scout_web/templates/transaction/_tabs.html.eex:17
 #: lib/block_scout_web/templates/transaction_log/index.html.eex:8
-#: lib/block_scout_web/views/address_view.ex:354
+#: lib/block_scout_web/views/address_view.ex:353
 #: lib/block_scout_web/views/transaction_view.ex:396
 msgid "Logs"
 msgstr ""
@@ -1859,7 +1859,7 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:62
 #: lib/block_scout_web/templates/tokens/overview/_tabs.html.eex:25
-#: lib/block_scout_web/views/address_view.ex:348
+#: lib/block_scout_web/views/address_view.ex:347
 #: lib/block_scout_web/views/tokens/overview_view.ex:37
 msgid "Read Contract"
 msgstr ""
@@ -1868,7 +1868,7 @@ msgstr ""
 #: lib/block_scout_web/templates/address/_tabs.html.eex:14
 #: lib/block_scout_web/templates/address_token/index.html.eex:8
 #: lib/block_scout_web/templates/address_token_transfer/index.html.eex:11
-#: lib/block_scout_web/views/address_view.ex:342
+#: lib/block_scout_web/views/address_view.ex:341
 msgid "Tokens"
 msgstr ""
 
@@ -1880,7 +1880,7 @@ msgstr ""
 #: lib/block_scout_web/templates/block_transaction/index.html.eex:18
 #: lib/block_scout_web/templates/chain/show.html.eex:184
 #: lib/block_scout_web/templates/layout/_topnav.html.eex:50
-#: lib/block_scout_web/views/address_view.ex:343
+#: lib/block_scout_web/views/address_view.ex:342
 msgid "Transactions"
 msgstr ""
 
@@ -1920,13 +1920,13 @@ msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:69
-#: lib/block_scout_web/views/address_view.ex:349
+#: lib/block_scout_web/views/address_view.ex:348
 msgid "Read Proxy"
 msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:76
-#: lib/block_scout_web/views/address_view.ex:350
+#: lib/block_scout_web/views/address_view.ex:349
 msgid "Write Contract"
 msgstr ""
 
@@ -1943,6 +1943,6 @@ msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address/_tabs.html.eex:83
-#: lib/block_scout_web/views/address_view.ex:351
+#: lib/block_scout_web/views/address_view.ex:350
 msgid "Write Proxy"
 msgstr ""
diff --git a/apps/explorer/lib/explorer/smart_contract/writer.ex b/apps/explorer/lib/explorer/smart_contract/writer.ex
index 8fe97d8bc9..3193cbc657 100644
--- a/apps/explorer/lib/explorer/smart_contract/writer.ex
+++ b/apps/explorer/lib/explorer/smart_contract/writer.ex
@@ -18,11 +18,7 @@ defmodule Explorer.SmartContract.Writer do
 
       _ ->
         abi
-        |> Enum.filter(
-          &(&1["type"] !== "event" &&
-              (&1["stateMutability"] == "nonpayable" || &1["stateMutability"] == "payable" || &1["payable"] ||
-                 (!&1["payable"] && !&1["constant"] && !&1["stateMutability"])))
-        )
+        |> filter_write_functions()
     end
   end
 
@@ -41,11 +37,26 @@ defmodule Explorer.SmartContract.Writer do
 
       _ ->
         implementation_abi
-        |> Enum.filter(
-          &(&1["type"] !== "event" &&
-              (&1["stateMutability"] == "nonpayable" || &1["stateMutability"] == "payable" || &1["payable"] ||
-                 (!&1["payable"] && !&1["constant"] && !&1["stateMutability"])))
-        )
+        |> filter_write_functions()
     end
   end
+
+  def write_function?(function) do
+    !event?(function) && !constructor?(function) &&
+      (payable?(function) || nonpayable?(function))
+  end
+
+  defp filter_write_functions(abi) do
+    abi
+    |> Enum.filter(&write_function?(&1))
+  end
+
+  defp event?(function), do: function["type"] == "event"
+  defp constructor?(function), do: function["type"] == "constructor"
+  defp payable?(function), do: function["stateMutability"] == "payable" || function["payable"]
+
+  defp nonpayable?(function),
+    do:
+      function["stateMutability"] == "nonpayable" ||
+        (!function["payable"] && !function["constant"] && !function["stateMutability"])
 end

From cd60db1830da0a38959e7c3f34cf5d493b03e254 Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Mon, 29 Jun 2020 16:57:25 +0300
Subject: [PATCH 19/34] Fix error on token\'s read contract tab

---
 .../controllers/tokens/read_contract_controller.ex              | 2 ++
 .../templates/tokens/read_contract/index.html.eex               | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/apps/block_scout_web/lib/block_scout_web/controllers/tokens/read_contract_controller.ex b/apps/block_scout_web/lib/block_scout_web/controllers/tokens/read_contract_controller.ex
index b1ff0fcfed..96b0cfe23b 100644
--- a/apps/block_scout_web/lib/block_scout_web/controllers/tokens/read_contract_controller.ex
+++ b/apps/block_scout_web/lib/block_scout_web/controllers/tokens/read_contract_controller.ex
@@ -13,6 +13,8 @@ defmodule BlockScoutWeb.Tokens.ReadContractController do
       render(
         conn,
         "index.html",
+        type: :regular,
+        action: :read,
         token: Market.add_price(token),
         counters_path: token_path(conn, :token_counters, %{"id" => Address.checksum(address_hash)})
       )
diff --git a/apps/block_scout_web/lib/block_scout_web/templates/tokens/read_contract/index.html.eex b/apps/block_scout_web/lib/block_scout_web/templates/tokens/read_contract/index.html.eex
index 492cdaf897..811035aac2 100644
--- a/apps/block_scout_web/lib/block_scout_web/templates/tokens/read_contract/index.html.eex
+++ b/apps/block_scout_web/lib/block_scout_web/templates/tokens/read_contract/index.html.eex
@@ -11,7 +11,7 @@
     <div class="card">
       <%= render OverviewView, "_tabs.html", assigns %>
       <!-- loaded via AJAX -->
-      <div class="card-body" data-smart-contract-functions data-hash="<%= Address.checksum(@token.contract_address.hash) %>" data-url="<%= smart_contract_path(@conn, :index) %>">
+      <div class="card-body" data-smart-contract-functions data-hash="<%= Address.checksum(@token.contract_address.hash) %>" data-type="<%= @type %>" data-action="<%= @action %>" data-url="<%= smart_contract_path(@conn, :index) %>">
         <div class="tile tile-muted text-center">
           <span class="loading-spinner-small mr-2">
             <span class="loading-spinner-block-1"></span>

From 3877fb170dcfd878171aeb93221b85bddd6fce7c Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Tue, 30 Jun 2020 12:26:04 +0300
Subject: [PATCH 20/34] Add tests

---
 .../views/smart_contract_view.ex              |  21 +-
 ...address_write_contract_controller_test.exs |  81 +++++
 .../address_write_proxy_controller_test.exs   |  81 +++++
 .../address_write_contract_view_test.exs      |  19 +
 .../address_write_proxy_view_test copy.exs    |  19 +
 .../views/tokens/smart_contract_view_test.exs | 177 +++++++++
 .../explorer/smart_contract/writer_test.exs   | 344 ++++++++++++++++++
 7 files changed, 738 insertions(+), 4 deletions(-)
 create mode 100644 apps/block_scout_web/test/block_scout_web/controllers/address_write_contract_controller_test.exs
 create mode 100644 apps/block_scout_web/test/block_scout_web/controllers/address_write_proxy_controller_test.exs
 create mode 100644 apps/block_scout_web/test/block_scout_web/views/address_write_contract_view_test.exs
 create mode 100644 apps/block_scout_web/test/block_scout_web/views/address_write_proxy_view_test copy.exs
 create mode 100644 apps/explorer/test/explorer/smart_contract/writer_test.exs

diff --git a/apps/block_scout_web/lib/block_scout_web/views/smart_contract_view.ex b/apps/block_scout_web/lib/block_scout_web/views/smart_contract_view.ex
index 1cde5f4df3..f0449424fb 100644
--- a/apps/block_scout_web/lib/block_scout_web/views/smart_contract_view.ex
+++ b/apps/block_scout_web/lib/block_scout_web/views/smart_contract_view.ex
@@ -5,18 +5,31 @@ defmodule BlockScoutWeb.SmartContractView do
 
   def queryable?(inputs) when is_nil(inputs), do: false
 
-  def writeable?(function),
-    do: payable?(function) || nonpayable?(function) || fallback?(function) || function["constant"] == false
+  def writeable?(function) when not is_nil(function),
+    do:
+      !constructor?(function) && !event?(function) &&
+        (payable?(function) || nonpayable?(function))
+
+  def writeable?(function) when is_nil(function), do: false
 
   def outputs?(outputs) when not is_nil(outputs), do: Enum.any?(outputs)
 
   def outputs?(outputs) when is_nil(outputs), do: false
 
-  def fallback?(function), do: function["type"] == "fallback"
+  defp event?(function), do: function["type"] == "event"
+
+  defp constructor?(function), do: function["type"] == "constructor"
 
   def payable?(function), do: function["stateMutability"] == "payable" || function["payable"]
 
-  def nonpayable?(function), do: function["stateMutability"] == "nonpayable"
+  def nonpayable?(function) do
+    if function["type"] do
+      function["stateMutability"] == "nonpayable" ||
+        (!function["payable"] && !function["constant"] && !function["stateMutability"])
+    else
+      false
+    end
+  end
 
   def address?(type), do: type in ["address", "address payable"]
 
diff --git a/apps/block_scout_web/test/block_scout_web/controllers/address_write_contract_controller_test.exs b/apps/block_scout_web/test/block_scout_web/controllers/address_write_contract_controller_test.exs
new file mode 100644
index 0000000000..9356c474ea
--- /dev/null
+++ b/apps/block_scout_web/test/block_scout_web/controllers/address_write_contract_controller_test.exs
@@ -0,0 +1,81 @@
+defmodule BlockScoutWeb.AddressWriteContractControllerTest do
+  use BlockScoutWeb.ConnCase, async: true
+
+  alias Explorer.ExchangeRates.Token
+  alias Explorer.Chain.Address
+
+  import Mox
+
+  describe "GET index/3" do
+    setup :set_mox_global
+
+    setup do
+      configuration = Application.get_env(:explorer, :checksum_function)
+      Application.put_env(:explorer, :checksum_function, :eth)
+
+      :ok
+
+      on_exit(fn ->
+        Application.put_env(:explorer, :checksum_function, configuration)
+      end)
+    end
+
+    test "with invalid address hash", %{conn: conn} do
+      conn = get(conn, address_write_contract_path(BlockScoutWeb.Endpoint, :index, "invalid_address"))
+
+      assert html_response(conn, 404)
+    end
+
+    test "with valid address that is not a contract", %{conn: conn} do
+      address = insert(:address)
+
+      conn = get(conn, address_write_contract_path(BlockScoutWeb.Endpoint, :index, Address.checksum(address.hash)))
+
+      assert html_response(conn, 404)
+    end
+
+    test "successfully renders the page when the address is a contract", %{conn: conn} do
+      contract_address = insert(:contract_address)
+
+      transaction = insert(:transaction, from_address: contract_address) |> with_block()
+
+      insert(
+        :internal_transaction_create,
+        index: 0,
+        transaction: transaction,
+        created_contract_address: contract_address,
+        block_hash: transaction.block_hash,
+        block_index: 0
+      )
+
+      insert(:smart_contract, address_hash: contract_address.hash)
+
+      conn =
+        get(conn, address_write_contract_path(BlockScoutWeb.Endpoint, :index, Address.checksum(contract_address.hash)))
+
+      assert html_response(conn, 200)
+      assert contract_address.hash == conn.assigns.address.hash
+      assert %Token{} = conn.assigns.exchange_rate
+    end
+
+    test "returns not found for an unverified contract", %{conn: conn} do
+      contract_address = insert(:contract_address)
+
+      transaction = insert(:transaction, from_address: contract_address) |> with_block()
+
+      insert(
+        :internal_transaction_create,
+        index: 0,
+        transaction: transaction,
+        created_contract_address: contract_address,
+        block_hash: transaction.block_hash,
+        block_index: 0
+      )
+
+      conn =
+        get(conn, address_write_contract_path(BlockScoutWeb.Endpoint, :index, Address.checksum(contract_address.hash)))
+
+      assert html_response(conn, 404)
+    end
+  end
+end
diff --git a/apps/block_scout_web/test/block_scout_web/controllers/address_write_proxy_controller_test.exs b/apps/block_scout_web/test/block_scout_web/controllers/address_write_proxy_controller_test.exs
new file mode 100644
index 0000000000..d4fc4917aa
--- /dev/null
+++ b/apps/block_scout_web/test/block_scout_web/controllers/address_write_proxy_controller_test.exs
@@ -0,0 +1,81 @@
+defmodule BlockScoutWeb.AddressWriteProxyControllerTest do
+  use BlockScoutWeb.ConnCase, async: true
+
+  alias Explorer.ExchangeRates.Token
+  alias Explorer.Chain.Address
+
+  import Mox
+
+  describe "GET index/3" do
+    setup :set_mox_global
+
+    setup do
+      configuration = Application.get_env(:explorer, :checksum_function)
+      Application.put_env(:explorer, :checksum_function, :eth)
+
+      :ok
+
+      on_exit(fn ->
+        Application.put_env(:explorer, :checksum_function, configuration)
+      end)
+    end
+
+    test "with invalid address hash", %{conn: conn} do
+      conn = get(conn, address_write_proxy_path(BlockScoutWeb.Endpoint, :index, "invalid_address"))
+
+      assert html_response(conn, 404)
+    end
+
+    test "with valid address that is not a contract", %{conn: conn} do
+      address = insert(:address)
+
+      conn = get(conn, address_write_proxy_path(BlockScoutWeb.Endpoint, :index, Address.checksum(address.hash)))
+
+      assert html_response(conn, 404)
+    end
+
+    test "successfully renders the page when the address is a contract", %{conn: conn} do
+      contract_address = insert(:contract_address)
+
+      transaction = insert(:transaction, from_address: contract_address) |> with_block()
+
+      insert(
+        :internal_transaction_create,
+        index: 0,
+        transaction: transaction,
+        created_contract_address: contract_address,
+        block_hash: transaction.block_hash,
+        block_index: 0
+      )
+
+      insert(:smart_contract, address_hash: contract_address.hash)
+
+      conn =
+        get(conn, address_write_proxy_path(BlockScoutWeb.Endpoint, :index, Address.checksum(contract_address.hash)))
+
+      assert html_response(conn, 200)
+      assert contract_address.hash == conn.assigns.address.hash
+      assert %Token{} = conn.assigns.exchange_rate
+    end
+
+    test "returns not found for an unverified contract", %{conn: conn} do
+      contract_address = insert(:contract_address)
+
+      transaction = insert(:transaction, from_address: contract_address) |> with_block()
+
+      insert(
+        :internal_transaction_create,
+        index: 0,
+        transaction: transaction,
+        created_contract_address: contract_address,
+        block_hash: transaction.block_hash,
+        block_index: 0
+      )
+
+      conn =
+        get(conn, address_write_proxy_path(BlockScoutWeb.Endpoint, :index, Address.checksum(contract_address.hash)))
+
+      assert html_response(conn, 404)
+    end
+  end
+end
diff --git a/apps/block_scout_web/test/block_scout_web/views/address_write_contract_view_test.exs b/apps/block_scout_web/test/block_scout_web/views/address_write_contract_view_test.exs
new file mode 100644
index 0000000000..55360f1229
--- /dev/null
+++ b/apps/block_scout_web/test/block_scout_web/views/address_write_contract_view_test.exs
@@ -0,0 +1,19 @@
+defmodule BlockScoutWeb.AddressWriteContractViewTest do
+  use BlockScoutWeb.ConnCase, async: true
+
+  alias BlockScoutWeb.AddressWriteContractView
+
+  describe "queryable?/1" do
+    test "returns true if list of inputs is not empty" do
+      assert AddressWriteContractView.queryable?([%{"name" => "argument_name", "type" => "uint256"}]) == true
+      assert AddressWriteContractView.queryable?([]) == false
+    end
+  end
+
+  describe "address?/1" do
+    test "returns true if type equals `address`" do
+      assert AddressWriteContractView.address?("address") == true
+      assert AddressWriteContractView.address?("uint256") == false
+    end
+  end
+end
diff --git a/apps/block_scout_web/test/block_scout_web/views/address_write_proxy_view_test copy.exs b/apps/block_scout_web/test/block_scout_web/views/address_write_proxy_view_test copy.exs
new file mode 100644
index 0000000000..e3db0d7003
--- /dev/null
+++ b/apps/block_scout_web/test/block_scout_web/views/address_write_proxy_view_test copy.exs	
@@ -0,0 +1,19 @@
+defmodule BlockScoutWeb.AddressWriteProxyViewTest do
+  use BlockScoutWeb.ConnCase, async: true
+
+  alias BlockScoutWeb.AddressWriteProxyView
+
+  describe "queryable?/1" do
+    test "returns true if list of inputs is not empty" do
+      assert AddressWriteProxyView.queryable?([%{"name" => "argument_name", "type" => "uint256"}]) == true
+      assert AddressWriteProxyView.queryable?([]) == false
+    end
+  end
+
+  describe "address?/1" do
+    test "returns true if type equals `address`" do
+      assert AddressWriteProxyView.address?("address") == true
+      assert AddressWriteProxyView.address?("uint256") == false
+    end
+  end
+end
diff --git a/apps/block_scout_web/test/block_scout_web/views/tokens/smart_contract_view_test.exs b/apps/block_scout_web/test/block_scout_web/views/tokens/smart_contract_view_test.exs
index 5ab8133bf5..cc812cd41b 100644
--- a/apps/block_scout_web/test/block_scout_web/views/tokens/smart_contract_view_test.exs
+++ b/apps/block_scout_web/test/block_scout_web/views/tokens/smart_contract_view_test.exs
@@ -17,6 +17,183 @@ defmodule BlockScoutWeb.SmartContractViewTest do
     end
   end
 
+  describe "writeable?" do
+    test "returns true when there is write function" do
+      function = %{
+        "type" => "function",
+        "stateMutability" => "nonpayable",
+        "payable" => false,
+        "outputs" => [],
+        "name" => "upgradeTo",
+        "inputs" => [%{"type" => "uint256", "name" => "version"}, %{"type" => "address", "name" => "implementation"}],
+        "constant" => false
+      }
+
+      assert SmartContractView.writeable?(function)
+    end
+
+    test "returns false when it is not a write function" do
+      function = %{
+        "type" => "function",
+        "stateMutability" => "view",
+        "payable" => false,
+        "outputs" => [%{"type" => "uint256", "name" => ""}],
+        "name" => "version",
+        "inputs" => [],
+        "constant" => true
+      }
+
+      refute SmartContractView.writeable?(function)
+    end
+
+    test "returns false when there is no function" do
+      function = %{}
+
+      refute SmartContractView.writeable?(function)
+    end
+
+    test "returns false when there function is nil" do
+      function = nil
+
+      refute SmartContractView.writeable?(function)
+    end
+  end
+
+  describe "outputs?" do
+    test "returns true when there are outputs" do
+      outputs = [%{"name" => "_narcoId", "type" => "uint256"}]
+
+      assert SmartContractView.outputs?(outputs)
+    end
+
+    test "returns false when there are no outputs" do
+      outputs = []
+
+      refute SmartContractView.outputs?(outputs)
+    end
+  end
+
+  describe "payable?" do
+    test "returns true when there is payable function" do
+      function = %{
+        "type" => "function",
+        "stateMutability" => "payable",
+        "payable" => true,
+        "outputs" => [],
+        "name" => "upgradeToAndCall",
+        "inputs" => [
+          %{"type" => "uint256", "name" => "version"},
+          %{"type" => "address", "name" => "implementation"},
+          %{"type" => "bytes", "name" => "data"}
+        ],
+        "constant" => false
+      }
+
+      assert SmartContractView.payable?(function)
+    end
+
+    test "returns true when there is old-style payable function" do
+      function = %{
+        "type" => "function",
+        "payable" => true,
+        "outputs" => [],
+        "name" => "upgradeToAndCall",
+        "inputs" => [
+          %{"type" => "uint256", "name" => "version"},
+          %{"type" => "address", "name" => "implementation"},
+          %{"type" => "bytes", "name" => "data"}
+        ],
+        "constant" => false
+      }
+
+      assert SmartContractView.payable?(function)
+    end
+
+    test "returns false when it is nonpayable function" do
+      function = %{
+        "type" => "function",
+        "stateMutability" => "nonpayable",
+        "payable" => false,
+        "outputs" => [],
+        "name" => "transferProxyOwnership",
+        "inputs" => [%{"type" => "address", "name" => "newOwner"}],
+        "constant" => false
+      }
+
+      refute SmartContractView.payable?(function)
+    end
+
+    test "returns false when there is no function" do
+      function = %{}
+
+      refute SmartContractView.payable?(function)
+    end
+
+    test "returns false when function is nil" do
+      function = nil
+
+      refute SmartContractView.payable?(function)
+    end
+  end
+
+  describe "nonpayable?" do
+    test "returns true when there is nonpayable function" do
+      function = %{
+        "type" => "function",
+        "stateMutability" => "nonpayable",
+        "payable" => false,
+        "outputs" => [],
+        "name" => "transferProxyOwnership",
+        "inputs" => [%{"type" => "address", "name" => "newOwner"}],
+        "constant" => false
+      }
+
+      assert SmartContractView.nonpayable?(function)
+    end
+
+    test "returns true when there is old-style nonpayable function" do
+      function = %{
+        "type" => "function",
+        "outputs" => [],
+        "name" => "test",
+        "inputs" => [%{"type" => "address", "name" => "newOwner"}],
+        "constant" => false
+      }
+
+      assert SmartContractView.nonpayable?(function)
+    end
+
+    test "returns false when it is payable function" do
+      function = %{
+        "type" => "function",
+        "stateMutability" => "payable",
+        "payable" => true,
+        "outputs" => [],
+        "name" => "upgradeToAndCall",
+        "inputs" => [
+          %{"type" => "uint256", "name" => "version"},
+          %{"type" => "address", "name" => "implementation"},
+          %{"type" => "bytes", "name" => "data"}
+        ],
+        "constant" => false
+      }
+
+      refute SmartContractView.nonpayable?(function)
+    end
+
+    test "returns true when there is no function" do
+      function = %{}
+
+      refute SmartContractView.nonpayable?(function)
+    end
+
+    test "returns false when function is nil" do
+      function = nil
+
+      refute SmartContractView.nonpayable?(function)
+    end
+  end
+
   describe "address?" do
     test "returns true when the type is equal to the string 'address'" do
       type = "address"
diff --git a/apps/explorer/test/explorer/smart_contract/writer_test.exs b/apps/explorer/test/explorer/smart_contract/writer_test.exs
new file mode 100644
index 0000000000..91b239f8db
--- /dev/null
+++ b/apps/explorer/test/explorer/smart_contract/writer_test.exs
@@ -0,0 +1,344 @@
+defmodule Explorer.SmartContract.WriterTest do
+  use EthereumJSONRPC.Case
+  use Explorer.DataCase
+
+  import Mox
+
+  alias Explorer.SmartContract.Writer
+
+  @abi [
+    %{
+      "type" => "function",
+      "stateMutability" => "nonpayable",
+      "payable" => false,
+      "outputs" => [],
+      "name" => "upgradeTo",
+      "inputs" => [%{"type" => "uint256", "name" => "version"}, %{"type" => "address", "name" => "implementation"}],
+      "constant" => false
+    },
+    %{
+      "type" => "function",
+      "stateMutability" => "view",
+      "payable" => false,
+      "outputs" => [%{"type" => "uint256", "name" => ""}],
+      "name" => "version",
+      "inputs" => [],
+      "constant" => true
+    },
+    %{
+      "type" => "function",
+      "stateMutability" => "view",
+      "payable" => false,
+      "outputs" => [%{"type" => "address", "name" => ""}],
+      "name" => "implementation",
+      "inputs" => [],
+      "constant" => true
+    },
+    %{
+      "type" => "function",
+      "stateMutability" => "view",
+      "payable" => false,
+      "outputs" => [%{"type" => "address", "name" => ""}],
+      "name" => "upgradeabilityOwner",
+      "inputs" => [],
+      "constant" => true
+    },
+    %{
+      "type" => "function",
+      "stateMutability" => "payable",
+      "payable" => true,
+      "outputs" => [],
+      "name" => "upgradeToAndCall",
+      "inputs" => [
+        %{"type" => "uint256", "name" => "version"},
+        %{"type" => "address", "name" => "implementation"},
+        %{"type" => "bytes", "name" => "data"}
+      ],
+      "constant" => false
+    },
+    %{
+      "type" => "function",
+      "stateMutability" => "nonpayable",
+      "payable" => false,
+      "outputs" => [],
+      "name" => "transferProxyOwnership",
+      "inputs" => [%{"type" => "address", "name" => "newOwner"}],
+      "constant" => false
+    },
+    %{"type" => "fallback", "stateMutability" => "payable", "payable" => true},
+    %{
+      "type" => "event",
+      "name" => "ProxyOwnershipTransferred",
+      "inputs" => [
+        %{"type" => "address", "name" => "previousOwner", "indexed" => false},
+        %{"type" => "address", "name" => "newOwner", "indexed" => false}
+      ],
+      "anonymous" => false
+    },
+    %{
+      "type" => "event",
+      "name" => "Upgraded",
+      "inputs" => [
+        %{"type" => "uint256", "name" => "version", "indexed" => false},
+        %{"type" => "address", "name" => "implementation", "indexed" => true}
+      ],
+      "anonymous" => false
+    }
+  ]
+
+  @implementation_abi [
+    %{
+      "type" => "function",
+      "stateMutability" => "view",
+      "payable" => false,
+      "outputs" => [%{"type" => "uint256", "name" => ""}],
+      "name" => "extraReceiverAmount",
+      "inputs" => [%{"type" => "address", "name" => "_receiver"}],
+      "constant" => true
+    },
+    %{
+      "type" => "function",
+      "stateMutability" => "view",
+      "payable" => false,
+      "outputs" => [%{"type" => "uint256", "name" => ""}],
+      "name" => "bridgesAllowedLength",
+      "inputs" => [],
+      "constant" => true
+    },
+    %{
+      "type" => "function",
+      "stateMutability" => "pure",
+      "payable" => false,
+      "outputs" => [%{"type" => "bytes4", "name" => ""}],
+      "name" => "blockRewardContractId",
+      "inputs" => [],
+      "constant" => true
+    },
+    %{
+      "type" => "function",
+      "stateMutability" => "view",
+      "payable" => false,
+      "outputs" => [%{"type" => "uint256", "name" => ""}],
+      "name" => "mintedForAccountInBlock",
+      "inputs" => [%{"type" => "address", "name" => "_account"}, %{"type" => "uint256", "name" => "_blockNumber"}],
+      "constant" => true
+    },
+    %{
+      "type" => "function",
+      "stateMutability" => "view",
+      "payable" => false,
+      "outputs" => [%{"type" => "uint256", "name" => ""}],
+      "name" => "mintedForAccount",
+      "inputs" => [%{"type" => "address", "name" => "_account"}],
+      "constant" => true
+    },
+    %{
+      "type" => "function",
+      "stateMutability" => "view",
+      "payable" => false,
+      "outputs" => [%{"type" => "uint256", "name" => ""}],
+      "name" => "mintedInBlock",
+      "inputs" => [%{"type" => "uint256", "name" => "_blockNumber"}],
+      "constant" => true
+    },
+    %{
+      "type" => "function",
+      "stateMutability" => "view",
+      "payable" => false,
+      "outputs" => [%{"type" => "uint256", "name" => ""}],
+      "name" => "mintedTotally",
+      "inputs" => [],
+      "constant" => true
+    },
+    %{
+      "type" => "function",
+      "stateMutability" => "pure",
+      "payable" => false,
+      "outputs" => [%{"type" => "address[1]", "name" => ""}],
+      "name" => "bridgesAllowed",
+      "inputs" => [],
+      "constant" => true
+    },
+    %{
+      "type" => "function",
+      "stateMutability" => "nonpayable",
+      "payable" => false,
+      "outputs" => [],
+      "name" => "addExtraReceiver",
+      "inputs" => [%{"type" => "uint256", "name" => "_amount"}, %{"type" => "address", "name" => "_receiver"}],
+      "constant" => false
+    },
+    %{
+      "type" => "function",
+      "stateMutability" => "view",
+      "payable" => false,
+      "outputs" => [%{"type" => "uint256", "name" => ""}],
+      "name" => "mintedTotallyByBridge",
+      "inputs" => [%{"type" => "address", "name" => "_bridge"}],
+      "constant" => true
+    },
+    %{
+      "type" => "function",
+      "stateMutability" => "view",
+      "payable" => false,
+      "outputs" => [%{"type" => "address", "name" => ""}],
+      "name" => "extraReceiverByIndex",
+      "inputs" => [%{"type" => "uint256", "name" => "_index"}],
+      "constant" => true
+    },
+    %{
+      "type" => "function",
+      "stateMutability" => "view",
+      "payable" => false,
+      "outputs" => [%{"type" => "uint256", "name" => ""}],
+      "name" => "bridgeAmount",
+      "inputs" => [%{"type" => "address", "name" => "_bridge"}],
+      "constant" => true
+    },
+    %{
+      "type" => "function",
+      "stateMutability" => "view",
+      "payable" => false,
+      "outputs" => [%{"type" => "uint256", "name" => ""}],
+      "name" => "extraReceiversLength",
+      "inputs" => [],
+      "constant" => true
+    },
+    %{
+      "type" => "function",
+      "stateMutability" => "nonpayable",
+      "payable" => false,
+      "outputs" => [%{"type" => "address[]", "name" => ""}, %{"type" => "uint256[]", "name" => ""}],
+      "name" => "reward",
+      "inputs" => [%{"type" => "address[]", "name" => "benefactors"}, %{"type" => "uint16[]", "name" => "kind"}],
+      "constant" => false
+    },
+    %{
+      "type" => "event",
+      "name" => "AddedReceiver",
+      "inputs" => [
+        %{"type" => "uint256", "name" => "amount", "indexed" => false},
+        %{"type" => "address", "name" => "receiver", "indexed" => true},
+        %{"type" => "address", "name" => "bridge", "indexed" => true}
+      ],
+      "anonymous" => false
+    }
+  ]
+
+  doctest Explorer.SmartContract.Writer
+
+  setup :verify_on_exit!
+
+  describe "write_functions/1" do
+    test "fetches the smart contract write functions" do
+      smart_contract =
+        insert(
+          :smart_contract,
+          abi: @abi
+        )
+
+      response = Writer.write_functions(smart_contract.address_hash)
+
+      assert [
+               %{
+                 "type" => "function",
+                 "stateMutability" => "nonpayable",
+                 "payable" => false,
+                 "outputs" => [],
+                 "name" => "upgradeTo",
+                 "inputs" => [
+                   %{"type" => "uint256", "name" => "version"},
+                   %{"type" => "address", "name" => "implementation"}
+                 ],
+                 "constant" => false
+               },
+               %{
+                 "type" => "function",
+                 "stateMutability" => "payable",
+                 "payable" => true,
+                 "outputs" => [],
+                 "name" => "upgradeToAndCall",
+                 "inputs" => [
+                   %{"type" => "uint256", "name" => "version"},
+                   %{"type" => "address", "name" => "implementation"},
+                   %{"type" => "bytes", "name" => "data"}
+                 ],
+                 "constant" => false
+               },
+               %{
+                 "type" => "function",
+                 "stateMutability" => "nonpayable",
+                 "payable" => false,
+                 "outputs" => [],
+                 "name" => "transferProxyOwnership",
+                 "inputs" => [%{"type" => "address", "name" => "newOwner"}],
+                 "constant" => false
+               },
+               %{"type" => "fallback", "stateMutability" => "payable", "payable" => true}
+             ] = response
+    end
+  end
+
+  describe "write_functions_proxy/1" do
+    test "fetches the smart contract proxy write functions" do
+      proxy_smart_contract =
+        insert(:smart_contract,
+          abi: @abi
+        )
+
+      implementation_contract_address = insert(:contract_address)
+
+      insert(:smart_contract,
+        address_hash: implementation_contract_address.hash,
+        abi: @implementation_abi
+      )
+
+      implementation_contract_address_hash_string =
+        Base.encode16(implementation_contract_address.hash.bytes, case: :lower)
+
+      expect(
+        EthereumJSONRPC.Mox,
+        :json_rpc,
+        fn [%{id: id, method: _, params: [%{data: _, to: _}, _]}], _options ->
+          {:ok,
+           [
+             %{
+               id: id,
+               jsonrpc: "2.0",
+               result: "0x000000000000000000000000" <> implementation_contract_address_hash_string
+             }
+           ]}
+        end
+      )
+
+      response = Writer.write_functions_proxy(proxy_smart_contract.address_hash)
+
+      assert [
+               %{
+                 "type" => "function",
+                 "stateMutability" => "nonpayable",
+                 "payable" => false,
+                 "outputs" => [],
+                 "name" => "addExtraReceiver",
+                 "inputs" => [
+                   %{"type" => "uint256", "name" => "_amount"},
+                   %{"type" => "address", "name" => "_receiver"}
+                 ],
+                 "constant" => false
+               },
+               %{
+                 "type" => "function",
+                 "stateMutability" => "nonpayable",
+                 "payable" => false,
+                 "outputs" => [%{"type" => "address[]", "name" => ""}, %{"type" => "uint256[]", "name" => ""}],
+                 "name" => "reward",
+                 "inputs" => [
+                   %{"type" => "address[]", "name" => "benefactors"},
+                   %{"type" => "uint16[]", "name" => "kind"}
+                 ],
+                 "constant" => false
+               }
+             ] = response
+    end
+  end
+end

From cddc58f32e60f529a4af3cd34cf321ce6e617b9c Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Tue, 30 Jun 2020 14:45:59 +0300
Subject: [PATCH 21/34] Display implementation address at read/write proxy tabs

---
 CHANGELOG.md                                           |  1 +
 apps/block_scout_web/assets/css/components/_card.scss  |  9 +++++++++
 .../controllers/smart_contract_controller.ex           |  5 +++++
 .../templates/smart_contract/_functions.html.eex       |  8 ++++++++
 apps/block_scout_web/priv/gettext/default.pot          | 10 +++++-----
 .../priv/gettext/en/LC_MESSAGES/default.po             | 10 +++++-----
 6 files changed, 33 insertions(+), 10 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index c8b207385d..a643888f17 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
 ## Current
 
 ### Features
+- [#3173](https://github.com/poanetwork/blockscout/pull/3173) - Display implementation address at read/write proxy tabs
 - [#3171](https://github.com/poanetwork/blockscout/pull/3171) - Import accounts/contracts/balances from Geth genesis.json
 - [#3161](https://github.com/poanetwork/blockscout/pull/3161) - Write proxy contracts feature
 - [#3160](https://github.com/poanetwork/blockscout/pull/3160) - Write contracts feature
diff --git a/apps/block_scout_web/assets/css/components/_card.scss b/apps/block_scout_web/assets/css/components/_card.scss
index fee262ebd4..e25d436cdd 100644
--- a/apps/block_scout_web/assets/css/components/_card.scss
+++ b/apps/block_scout_web/assets/css/components/_card.scss
@@ -256,4 +256,13 @@ $card-tab-icon-color-active: #fff !default;
   @include media-breakpoint-down(sm) {
     margin-left: 15px!important;
   } 
+}
+
+.implementation-title {
+  float: left;
+  margin-right: 5px;
+}
+
+.implementation-value {
+  line-height: 30px;
 }
\ No newline at end of file
diff --git a/apps/block_scout_web/lib/block_scout_web/controllers/smart_contract_controller.ex b/apps/block_scout_web/lib/block_scout_web/controllers/smart_contract_controller.ex
index 604d8cab00..038a15d4de 100644
--- a/apps/block_scout_web/lib/block_scout_web/controllers/smart_contract_controller.ex
+++ b/apps/block_scout_web/lib/block_scout_web/controllers/smart_contract_controller.ex
@@ -40,6 +40,10 @@ defmodule BlockScoutWeb.SmartContractController do
           []
         end
 
+      implementation_address_hash_string =
+        Chain.get_implementation_address_hash(address.hash, address.smart_contract.abi) ||
+          "0x0000000000000000000000000000000000000000"
+
       conn
       |> put_status(200)
       |> put_layout(false)
@@ -48,6 +52,7 @@ defmodule BlockScoutWeb.SmartContractController do
         read_only_functions: functions,
         address: address,
         contract_abi: contract_abi,
+        implementation_address: implementation_address_hash_string,
         implementation_abi: implementation_abi,
         contract_type: contract_type
       )
diff --git a/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex b/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex
index 9570f4a418..41c993cc29 100644
--- a/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex
+++ b/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex
@@ -1,3 +1,11 @@
+<%= if @contract_type == "proxy" do %>
+<div>
+    <h2 class="implementation-title">Implementation address: </h2><h3  class="implementation-value"><%= link(
+                  @implementation_address,
+                  to: address_path(@conn, :show, @implementation_address)
+                ) %></h3>
+</div>
+<% end %>
 <%= for {function, counter} <- Enum.with_index(@read_only_functions, 1) do %>
   <div class="d-flex py-2 border-bottom" data-function>
     <div class="py-2 pr-2 text-nowrap">
diff --git a/apps/block_scout_web/priv/gettext/default.pot b/apps/block_scout_web/priv/gettext/default.pot
index da842aab61..c4a0a11936 100644
--- a/apps/block_scout_web/priv/gettext/default.pot
+++ b/apps/block_scout_web/priv/gettext/default.pot
@@ -568,8 +568,8 @@ msgid "ERC-721 "
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:32
-#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:67
+#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:40
+#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:75
 msgid "ETH"
 msgstr ""
 
@@ -1195,7 +1195,7 @@ msgid "QR Code"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:36
+#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:44
 msgid "Query"
 msgstr ""
 
@@ -1649,7 +1649,7 @@ msgid "View transaction %{transaction} on %{subnetwork}"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:66
+#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:74
 msgid "WEI"
 msgstr ""
 
@@ -1937,7 +1937,7 @@ msgid "Waiting for transaction's confirmation..."
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:36
+#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:44
 msgid "Write"
 msgstr ""
 
diff --git a/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po b/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po
index da842aab61..c4a0a11936 100644
--- a/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po
+++ b/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po
@@ -568,8 +568,8 @@ msgid "ERC-721 "
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:32
-#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:67
+#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:40
+#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:75
 msgid "ETH"
 msgstr ""
 
@@ -1195,7 +1195,7 @@ msgid "QR Code"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:36
+#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:44
 msgid "Query"
 msgstr ""
 
@@ -1649,7 +1649,7 @@ msgid "View transaction %{transaction} on %{subnetwork}"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:66
+#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:74
 msgid "WEI"
 msgstr ""
 
@@ -1937,7 +1937,7 @@ msgid "Waiting for transaction's confirmation..."
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:36
+#: lib/block_scout_web/templates/smart_contract/_functions.html.eex:44
 msgid "Write"
 msgstr ""
 

From 5be42bb43845932abf8234fb3e45f39cb2768d9a Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Thu, 2 Jul 2020 12:49:31 +0300
Subject: [PATCH 22/34] EIP-1967 support

---
 CHANGELOG.md                                  |  1 +
 .../controllers/smart_contract_controller.ex  | 20 +++---
 .../smart_contract_controller_test.exs        | 61 ++++++++++++++++++-
 .../lib/ethereum_jsonrpc/contract.ex          | 24 +++++++-
 apps/explorer/lib/explorer/chain.ex           | 51 ++++++++++++----
 .../lib/explorer/smart_contract/reader.ex     | 35 ++++++++---
 .../lib/explorer/smart_contract/writer.ex     |  9 +--
 apps/explorer/test/explorer/chain_test.exs    | 28 +++++++++
 .../explorer/smart_contract/reader_test.exs   | 21 ++-----
 .../explorer/smart_contract/writer_test.exs   | 17 +-----
 10 files changed, 197 insertions(+), 70 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index a643888f17..5e7066f606 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
 ## Current
 
 ### Features
+- [#3174](https://github.com/poanetwork/blockscout/pull/3174) - EIP-1967 support: transparent proxy pattern
 - [#3173](https://github.com/poanetwork/blockscout/pull/3173) - Display implementation address at read/write proxy tabs
 - [#3171](https://github.com/poanetwork/blockscout/pull/3171) - Import accounts/contracts/balances from Geth genesis.json
 - [#3161](https://github.com/poanetwork/blockscout/pull/3161) - Write proxy contracts feature
diff --git a/apps/block_scout_web/lib/block_scout_web/controllers/smart_contract_controller.ex b/apps/block_scout_web/lib/block_scout_web/controllers/smart_contract_controller.ex
index 038a15d4de..142005e8b6 100644
--- a/apps/block_scout_web/lib/block_scout_web/controllers/smart_contract_controller.ex
+++ b/apps/block_scout_web/lib/block_scout_web/controllers/smart_contract_controller.ex
@@ -14,16 +14,24 @@ defmodule BlockScoutWeb.SmartContractController do
     with true <- ajax?(conn),
          {:ok, address_hash} <- Chain.string_to_address_hash(address_hash_string),
          {:ok, address} <- Chain.find_contract_address(address_hash, address_options, true) do
+      implementation_address_hash_string =
+        if contract_type == "proxy" do
+          Chain.get_implementation_address_hash(address.hash, address.smart_contract.abi) ||
+            "0x0000000000000000000000000000000000000000"
+        else
+          "0x0000000000000000000000000000000000000000"
+        end
+
       functions =
         if action == "write" do
           if contract_type == "proxy" do
-            Writer.write_functions_proxy(address_hash)
+            Writer.write_functions_proxy(implementation_address_hash_string)
           else
             Writer.write_functions(address_hash)
           end
         else
           if contract_type == "proxy" do
-            Reader.read_only_functions_proxy(address_hash)
+            Reader.read_only_functions_proxy(address_hash, implementation_address_hash_string)
           else
             Reader.read_only_functions(address_hash)
           end
@@ -33,17 +41,13 @@ defmodule BlockScoutWeb.SmartContractController do
 
       implementation_abi =
         if contract_type == "proxy" do
-          address.hash
-          |> Chain.get_implementation_abi_from_proxy(address.smart_contract.abi)
+          implementation_address_hash_string
+          |> Chain.get_implementation_abi()
           |> Poison.encode!()
         else
           []
         end
 
-      implementation_address_hash_string =
-        Chain.get_implementation_address_hash(address.hash, address.smart_contract.abi) ||
-          "0x0000000000000000000000000000000000000000"
-
       conn
       |> put_status(200)
       |> put_layout(false)
diff --git a/apps/block_scout_web/test/block_scout_web/controllers/smart_contract_controller_test.exs b/apps/block_scout_web/test/block_scout_web/controllers/smart_contract_controller_test.exs
index a159460215..cd4e7e63bb 100644
--- a/apps/block_scout_web/test/block_scout_web/controllers/smart_contract_controller_test.exs
+++ b/apps/block_scout_web/test/block_scout_web/controllers/smart_contract_controller_test.exs
@@ -68,7 +68,56 @@ defmodule BlockScoutWeb.SmartContractControllerTest do
     test "lists [] proxy read only functions if no verified implementation" do
       token_contract_address = insert(:contract_address)
 
-      insert(:smart_contract, address_hash: token_contract_address.hash)
+      insert(:smart_contract,
+        address_hash: token_contract_address.hash,
+        abi: [
+          %{
+            "type" => "function",
+            "stateMutability" => "view",
+            "payable" => false,
+            "outputs" => [%{"type" => "address", "name" => ""}],
+            "name" => "implementation",
+            "inputs" => [],
+            "constant" => true
+          }
+        ]
+      )
+
+      path =
+        smart_contract_path(BlockScoutWeb.Endpoint, :index,
+          hash: token_contract_address.hash,
+          type: :proxy,
+          action: :read
+        )
+
+      conn =
+        build_conn()
+        |> put_req_header("x-requested-with", "xmlhttprequest")
+        |> get(path)
+
+      assert conn.status == 200
+      assert conn.assigns.read_only_functions == []
+    end
+
+    test "lists [] proxy read only functions if no verified eip-1967 implementation" do
+      token_contract_address = insert(:contract_address)
+
+      insert(:smart_contract,
+        address_hash: token_contract_address.hash,
+        abi: [
+          %{
+            "type" => "function",
+            "stateMutability" => "nonpayable",
+            "payable" => false,
+            "outputs" => [%{"type" => "address", "name" => "", "internalType" => "address"}],
+            "name" => "implementation",
+            "inputs" => [],
+            "constant" => false
+          }
+        ]
+      )
+
+      blockchain_get_implementation_mock()
 
       path =
         smart_contract_path(BlockScoutWeb.Endpoint, :index,
@@ -182,4 +231,14 @@ defmodule BlockScoutWeb.SmartContractControllerTest do
       end
     )
   end
+
+  defp blockchain_get_implementation_mock do
+    expect(
+      EthereumJSONRPC.Mox,
+      :json_rpc,
+      fn %{id: _, method: _, params: [_, _, _]}, _options ->
+        {:ok, "0xcebb2CCCFe291F0c442841cBE9C1D06EED61Ca02"}
+      end
+    )
+  end
 end
diff --git a/apps/ethereum_jsonrpc/lib/ethereum_jsonrpc/contract.ex b/apps/ethereum_jsonrpc/lib/ethereum_jsonrpc/contract.ex
index e1c60f7352..ed0e6d614f 100644
--- a/apps/ethereum_jsonrpc/lib/ethereum_jsonrpc/contract.ex
+++ b/apps/ethereum_jsonrpc/lib/ethereum_jsonrpc/contract.ex
@@ -41,7 +41,7 @@ defmodule EthereumJSONRPC.Contract do
       |> Enum.map(fn {%{contract_address: contract_address, function_name: function_name, args: args} = request, index} ->
         functions[function_name]
         |> Encoder.encode_function_call(args)
-        |> eth_call_request(contract_address, index, Map.get(request, :block_number))
+        |> eth_call_request(contract_address, index, Map.get(request, :block_number), Map.get(request, :from))
       end)
       |> json_rpc(json_rpc_named_arguments)
       |> case do
@@ -70,7 +70,7 @@ defmodule EthereumJSONRPC.Contract do
       Enum.map(requests, fn _ -> format_error(error) end)
   end
 
-  defp eth_call_request(data, contract_address, id, block_number) do
+  defp eth_call_request(data, contract_address, id, block_number, from) do
     block =
       case block_number do
         nil -> "latest"
@@ -80,10 +80,28 @@ defmodule EthereumJSONRPC.Contract do
     request(%{
       id: id,
       method: "eth_call",
-      params: [%{to: contract_address, data: data}, block]
+      params: [%{to: contract_address, data: data, from: from}, block]
     })
   end
 
+  def eth_get_storage_at_request(contract_address, storage_pointer, block_number, json_rpc_named_arguments) do
+    block =
+      case block_number do
+        nil -> "latest"
+        block_number -> integer_to_quantity(block_number)
+      end
+
+    result =
+      %{id: 0, method: "eth_getStorageAt", params: [contract_address, storage_pointer, block]}
+      |> request()
+      |> json_rpc(json_rpc_named_arguments)
+
+    case result do
+      {:ok, storage_value} -> {:ok, storage_value}
+      other -> other
+    end
+  end
+
   defp format_error(message) when is_binary(message) do
     {:error, message}
   end
diff --git a/apps/explorer/lib/explorer/chain.ex b/apps/explorer/lib/explorer/chain.ex
index e17cbc4f75..c9b6c6d896 100644
--- a/apps/explorer/lib/explorer/chain.ex
+++ b/apps/explorer/lib/explorer/chain.ex
@@ -28,6 +28,7 @@ defmodule Explorer.Chain do
   alias Ecto.Adapters.SQL
   alias Ecto.{Changeset, Multi}
 
+  alias EthereumJSONRPC.Contract
   alias EthereumJSONRPC.Transaction, as: EthereumJSONRPCTransaction
 
   alias Explorer.Counters.LastFetchedCounter
@@ -4364,18 +4365,44 @@ defmodule Explorer.Chain do
 
   def get_implementation_address_hash(proxy_address_hash, abi)
       when not is_nil(proxy_address_hash) and not is_nil(abi) do
-    implementation_address =
-      case Reader.query_contract(proxy_address_hash, abi, %{
-             "implementation" => []
-           }) do
-        %{"implementation" => {:ok, [result]}} -> result
-        _ -> nil
-      end
+    implementation_method_abi =
+      abi
+      |> Enum.find(fn method ->
+        Map.get(method, "name") == "implementation"
+      end)
+
+    implementation_method_abi_state_mutability = Map.get(implementation_method_abi, "stateMutability")
+    is_eip1967 = if implementation_method_abi_state_mutability == "nonpayable", do: true, else: false
+
+    if is_eip1967 do
+      json_rpc_named_arguments = Application.get_env(:explorer, :json_rpc_named_arguments)
 
-    if implementation_address do
-      "0x" <> Base.encode16(implementation_address, case: :lower)
+      # https://eips.ethereum.org/EIPS/eip-1967
+      eip_1967_implementation_storage_pointer = "0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc"
+
+      {:ok, implementation_address} =
+        Contract.eth_get_storage_at_request(
+          proxy_address_hash,
+          eip_1967_implementation_storage_pointer,
+          nil,
+          json_rpc_named_arguments
+        )
+
+      implementation_address
     else
-      nil
+      implementation_address =
+        case Reader.query_contract(proxy_address_hash, abi, %{
+               "implementation" => []
+             }) do
+          %{"implementation" => {:ok, [result]}} -> result
+          _ -> nil
+        end
+
+      if implementation_address do
+        "0x" <> Base.encode16(implementation_address, case: :lower)
+      else
+        nil
+      end
     end
   end
 
@@ -4383,7 +4410,7 @@ defmodule Explorer.Chain do
     nil
   end
 
-  defp get_implementation_abi(implementation_address_hash_string) when not is_nil(implementation_address_hash_string) do
+  def get_implementation_abi(implementation_address_hash_string) when not is_nil(implementation_address_hash_string) do
     case Chain.string_to_address_hash(implementation_address_hash_string) do
       {:ok, implementation_address_hash} ->
         implementation_smart_contract =
@@ -4402,7 +4429,7 @@ defmodule Explorer.Chain do
     end
   end
 
-  defp get_implementation_abi(implementation_address_hash_string) when is_nil(implementation_address_hash_string) do
+  def get_implementation_abi(implementation_address_hash_string) when is_nil(implementation_address_hash_string) do
     []
   end
 
diff --git a/apps/explorer/lib/explorer/smart_contract/reader.ex b/apps/explorer/lib/explorer/smart_contract/reader.ex
index 933922ecc3..72eef9aa95 100644
--- a/apps/explorer/lib/explorer/smart_contract/reader.ex
+++ b/apps/explorer/lib/explorer/smart_contract/reader.ex
@@ -112,6 +112,32 @@ defmodule Explorer.SmartContract.Reader do
     end)
   end
 
+  @spec query_contract(
+          String.t(),
+          String.t(),
+          term(),
+          functions()
+        ) :: functions_results()
+  def query_contract(contract_address, from, abi, functions) do
+    requests =
+      functions
+      |> Enum.map(fn {function_name, args} ->
+        %{
+          contract_address: contract_address,
+          from: from,
+          function_name: function_name,
+          args: args
+        }
+      end)
+
+    requests
+    |> query_contracts(abi)
+    |> Enum.zip(requests)
+    |> Enum.into(%{}, fn {response, request} ->
+      {request.function_name, response}
+    end)
+  end
+
   @doc """
   Runs batch of contract functions on given addresses for smart contract with an expected ABI and functions.
 
@@ -180,13 +206,8 @@ defmodule Explorer.SmartContract.Reader do
     end
   end
 
-  def read_only_functions_proxy(contract_address_hash) do
-    abi =
-      contract_address_hash
-      |> Chain.address_hash_to_smart_contract()
-      |> Map.get(:abi)
-
-    implementation_abi = Chain.get_implementation_abi_from_proxy(contract_address_hash, abi)
+  def read_only_functions_proxy(contract_address_hash, implementation_address_hash_string) do
+    implementation_abi = Chain.get_implementation_abi(implementation_address_hash_string)
 
     case implementation_abi do
       nil ->
diff --git a/apps/explorer/lib/explorer/smart_contract/writer.ex b/apps/explorer/lib/explorer/smart_contract/writer.ex
index 3193cbc657..872742fe73 100644
--- a/apps/explorer/lib/explorer/smart_contract/writer.ex
+++ b/apps/explorer/lib/explorer/smart_contract/writer.ex
@@ -23,13 +23,8 @@ defmodule Explorer.SmartContract.Writer do
   end
 
   @spec write_functions_proxy(Hash.t()) :: [%{}]
-  def write_functions_proxy(contract_address_hash) do
-    abi =
-      contract_address_hash
-      |> Chain.address_hash_to_smart_contract()
-      |> Map.get(:abi)
-
-    implementation_abi = Chain.get_implementation_abi_from_proxy(contract_address_hash, abi)
+  def write_functions_proxy(implementation_address_hash_string) do
+    implementation_abi = Chain.get_implementation_abi(implementation_address_hash_string)
 
     case implementation_abi do
       nil ->
diff --git a/apps/explorer/test/explorer/chain_test.exs b/apps/explorer/test/explorer/chain_test.exs
index 639dc51688..dc9b9f59ba 100644
--- a/apps/explorer/test/explorer/chain_test.exs
+++ b/apps/explorer/test/explorer/chain_test.exs
@@ -5410,5 +5410,33 @@ defmodule Explorer.ChainTest do
 
       assert implementation_abi == @implementation_abi
     end
+
+    test "get_implementation_abi/1 returns empty [] abi if implmentation address is null" do
+      assert Chain.get_implementation_abi(nil) == []
+    end
+
+    test "get_implementation_abi/1 returns [] if implementation is not verified" do
+      implementation_contract_address = insert(:contract_address)
+
+      implementation_contract_address_hash_string =
+        Base.encode16(implementation_contract_address.hash.bytes, case: :lower)
+
+      assert Chain.get_implementation_abi("0x" <> implementation_contract_address_hash_string) == []
+    end
+
+    test "get_implementation_abi/1 returns implementation abi if implementation is verified" do
+      proxy_contract_address = insert(:contract_address)
+      insert(:smart_contract, address_hash: proxy_contract_address.hash, abi: @proxy_abi)
+
+      implementation_contract_address = insert(:contract_address)
+      insert(:smart_contract, address_hash: implementation_contract_address.hash, abi: @implementation_abi)
+
+      implementation_contract_address_hash_string =
+        Base.encode16(implementation_contract_address.hash.bytes, case: :lower)
+
+      implementation_abi = Chain.get_implementation_abi("0x" <> implementation_contract_address_hash_string)
+
+      assert implementation_abi == @implementation_abi
+    end
   end
 end
diff --git a/apps/explorer/test/explorer/smart_contract/reader_test.exs b/apps/explorer/test/explorer/smart_contract/reader_test.exs
index 9b3e14f8c2..17ede61237 100644
--- a/apps/explorer/test/explorer/smart_contract/reader_test.exs
+++ b/apps/explorer/test/explorer/smart_contract/reader_test.exs
@@ -220,24 +220,13 @@ defmodule Explorer.SmartContract.ReaderTest do
       implementation_contract_address_hash_string =
         Base.encode16(implementation_contract_address.hash.bytes, case: :lower)
 
-      expect(
-        EthereumJSONRPC.Mox,
-        :json_rpc,
-        fn [%{id: id, method: _, params: [%{data: _, to: _}, _]}], _options ->
-          {:ok,
-           [
-             %{
-               id: id,
-               jsonrpc: "2.0",
-               result: "0x000000000000000000000000" <> implementation_contract_address_hash_string
-             }
-           ]}
-        end
-      )
-
       blockchain_get_function_mock()
 
-      response = Reader.read_only_functions_proxy(proxy_smart_contract.address_hash)
+      response =
+        Reader.read_only_functions_proxy(
+          proxy_smart_contract.address_hash,
+          "0x" <> implementation_contract_address_hash_string
+        )
 
       assert [
                %{
diff --git a/apps/explorer/test/explorer/smart_contract/writer_test.exs b/apps/explorer/test/explorer/smart_contract/writer_test.exs
index 91b239f8db..00037b7149 100644
--- a/apps/explorer/test/explorer/smart_contract/writer_test.exs
+++ b/apps/explorer/test/explorer/smart_contract/writer_test.exs
@@ -296,22 +296,7 @@ defmodule Explorer.SmartContract.WriterTest do
       implementation_contract_address_hash_string =
         Base.encode16(implementation_contract_address.hash.bytes, case: :lower)
 
-      expect(
-        EthereumJSONRPC.Mox,
-        :json_rpc,
-        fn [%{id: id, method: _, params: [%{data: _, to: _}, _]}], _options ->
-          {:ok,
-           [
-             %{
-               id: id,
-               jsonrpc: "2.0",
-               result: "0x000000000000000000000000" <> implementation_contract_address_hash_string
-             }
-           ]}
-        end
-      )
-
-      response = Writer.write_functions_proxy(proxy_smart_contract.address_hash)
+      response = Writer.write_functions_proxy("0x" <> implementation_contract_address_hash_string)
 
       assert [
                %{

From 7e29fadda0e202d93e21b4d5f6e5fcc4ec149798 Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Thu, 2 Jul 2020 15:13:44 +0300
Subject: [PATCH 23/34] Blockscout 3.3.0

---
 CHANGELOG.md | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5e7066f606..99741c9657 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,14 @@
 ## Current
 
+### Features
+
+### Fixes
+
+### Chore
+
+
+## 3.3.0-beta
+
 ### Features
 - [#3174](https://github.com/poanetwork/blockscout/pull/3174) - EIP-1967 support: transparent proxy pattern
 - [#3173](https://github.com/poanetwork/blockscout/pull/3173) - Display implementation address at read/write proxy tabs

From 3fda980e6710aef1c77071fcad722c26b599e8a6 Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Thu, 2 Jul 2020 15:50:03 +0300
Subject: [PATCH 24/34] eip1967 update: handle different size response from
 eth_getStorageAt for implementation address

---
 .../smart_contract_controller_test.exs        | 46 +++++++++++++++++++
 apps/explorer/lib/explorer/chain.ex           |  6 ++-
 2 files changed, 51 insertions(+), 1 deletion(-)

diff --git a/apps/block_scout_web/test/block_scout_web/controllers/smart_contract_controller_test.exs b/apps/block_scout_web/test/block_scout_web/controllers/smart_contract_controller_test.exs
index cd4e7e63bb..ec2565ed1c 100644
--- a/apps/block_scout_web/test/block_scout_web/controllers/smart_contract_controller_test.exs
+++ b/apps/block_scout_web/test/block_scout_web/controllers/smart_contract_controller_test.exs
@@ -134,6 +134,42 @@ defmodule BlockScoutWeb.SmartContractControllerTest do
       assert conn.status == 200
       assert conn.assigns.read_only_functions == []
     end
+
+    test "lists [] proxy read only functions if no verified eip-1967 implementation and eth_getStorageAt returns not nnormalized address hash" do
+      token_contract_address = insert(:contract_address)
+
+      insert(:smart_contract,
+        address_hash: token_contract_address.hash,
+        abi: [
+          %{
+            "type" => "function",
+            "stateMutability" => "nonpayable",
+            "payable" => false,
+            "outputs" => [%{"type" => "address", "name" => "", "internalType" => "address"}],
+            "name" => "implementation",
+            "inputs" => [],
+            "constant" => false
+          }
+        ]
+      )
+
+      blockchain_get_implementation_mock_2()
+
+      path =
+        smart_contract_path(BlockScoutWeb.Endpoint, :index,
+          hash: token_contract_address.hash,
+          type: :proxy,
+          action: :read
+        )
+
+      conn =
+        build_conn()
+        |> put_req_header("x-requested-with", "xmlhttprequest")
+        |> get(path)
+
+      assert conn.status == 200
+      assert conn.assigns.read_only_functions == []
+    end
   end
 
   describe "GET show/3" do
@@ -241,4 +277,14 @@ defmodule BlockScoutWeb.SmartContractControllerTest do
       end
     )
   end
+
+  defp blockchain_get_implementation_mock_2 do
+    expect(
+      EthereumJSONRPC.Mox,
+      :json_rpc,
+      fn %{id: _, method: _, params: [_, _, _]}, _options ->
+        {:ok, "0x000000000000000000000000cebb2CCCFe291F0c442841cBE9C1D06EED61Ca02"}
+      end
+    )
+  end
 end
diff --git a/apps/explorer/lib/explorer/chain.ex b/apps/explorer/lib/explorer/chain.ex
index c9b6c6d896..1fe0828612 100644
--- a/apps/explorer/lib/explorer/chain.ex
+++ b/apps/explorer/lib/explorer/chain.ex
@@ -4388,7 +4388,11 @@ defmodule Explorer.Chain do
           json_rpc_named_arguments
         )
 
-      implementation_address
+      if String.length(implementation_address) > 42 do
+        "0x" <> String.slice(implementation_address, -40, 40)
+      else
+        implementation_address
+      end
     else
       implementation_address =
         case Reader.query_contract(proxy_address_hash, abi, %{

From a74decfb508fe0b9c98b397357c8d1f07f3868bb Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Fri, 3 Jul 2020 11:27:52 +0300
Subject: [PATCH 25/34] Fix permanent fetching tokens and unavailable navbar
 menu when read/write proxy tab is active

---
 CHANGELOG.md                                                   | 2 ++
 apps/block_scout_web/assets/js/lib/smart_contract/functions.js | 1 +
 .../lib/block_scout_web/templates/layout/app.html.eex          | 3 +++
 3 files changed, 6 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 99741c9657..633291b348 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,8 @@
 ### Features
 
 ### Fixes
+-[#3178](https://github.com/poanetwork/blockscout/pull/3178) - Fix permanent fetching tokens...  when read/write proxy tab is active
+-[#3178](https://github.com/poanetwork/blockscout/pull/3178) - Fix unavailable navbar menu when read/write proxy tab is active
 
 ### Chore
 
diff --git a/apps/block_scout_web/assets/js/lib/smart_contract/functions.js b/apps/block_scout_web/assets/js/lib/smart_contract/functions.js
index 8ee173c925..fc168d04f9 100644
--- a/apps/block_scout_web/assets/js/lib/smart_contract/functions.js
+++ b/apps/block_scout_web/assets/js/lib/smart_contract/functions.js
@@ -2,6 +2,7 @@ import $ from 'jquery'
 import ethNetProps from 'eth-net-props'
 import { walletEnabled, getCurrentAccount } from './write.js'
 import { openErrorModal, openWarningModal, openSuccessModal, openModalWithMessage } from '../modals.js'
+import '../../pages/address'
 
 const WEI_MULTIPLIER = 10 ** 18
 
diff --git a/apps/block_scout_web/lib/block_scout_web/templates/layout/app.html.eex b/apps/block_scout_web/lib/block_scout_web/templates/layout/app.html.eex
index 9d463fbde5..1dfcd55b2c 100644
--- a/apps/block_scout_web/lib/block_scout_web/templates/layout/app.html.eex
+++ b/apps/block_scout_web/lib/block_scout_web/templates/layout/app.html.eex
@@ -86,6 +86,9 @@
       @view_module != Elixir.BlockScoutWeb.AddressContractView &&
       @view_module != Elixir.BlockScoutWeb.AddressContractVerificationView &&
       @view_module != Elixir.BlockScoutWeb.AddressReadContractView &&
+      @view_module != Elixir.BlockScoutWeb.AddressReadProxyView &&
+      @view_module != Elixir.BlockScoutWeb.AddressWriteContractView &&
+      @view_module != Elixir.BlockScoutWeb.AddressWriteProxyView &&
       @view_module != Elixir.BlockScoutWeb.Tokens.TransferView &&
       @view_module != Elixir.BlockScoutWeb.Tokens.ReadContractView &&
       @view_module != Elixir.BlockScoutWeb.Tokens.HolderView &&

From 42862f358ba167c7bd3976edcafd06765fb4a12a Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Mon, 6 Jul 2020 13:36:01 +0300
Subject: [PATCH 26/34] Return correct status to verify api if conntract
 verified, remove Kovan from the list of default chains

---
 CHANGELOG.md                                       |  6 ++++--
 .../controllers/api/rpc/contract_controller.ex     | 14 ++++++++++++++
 .../lib/block_scout_web/etherscan.ex               |  6 +++---
 .../lib/block_scout_web/views/layout_view.ex       |  7 +------
 4 files changed, 22 insertions(+), 11 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 633291b348..9597989a84 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,10 +3,12 @@
 ### Features
 
 ### Fixes
--[#3178](https://github.com/poanetwork/blockscout/pull/3178) - Fix permanent fetching tokens...  when read/write proxy tab is active
--[#3178](https://github.com/poanetwork/blockscout/pull/3178) - Fix unavailable navbar menu when read/write proxy tab is active
+- [#3178](https://github.com/poanetwork/blockscout/pull/3178) - Fix permanent fetching tokens...  when read/write proxy tab is active
+- [#3178](https://github.com/poanetwork/blockscout/pull/3178) - Fix unavailable navbar menu when read/write proxy tab is active
 
 ### Chore
+- [#3180](https://github.com/poanetwork/blockscout/pull/3180) - Return correct status in verify API endpoint if contract verified
+- [#3180](https://github.com/poanetwork/blockscout/pull/3180) - Remove Kovan from the list of default chains
 
 
 ## 3.3.0-beta
diff --git a/apps/block_scout_web/lib/block_scout_web/controllers/api/rpc/contract_controller.ex b/apps/block_scout_web/lib/block_scout_web/controllers/api/rpc/contract_controller.ex
index 3b3c9af5ec..ee1d38ae1f 100644
--- a/apps/block_scout_web/lib/block_scout_web/controllers/api/rpc/contract_controller.ex
+++ b/apps/block_scout_web/lib/block_scout_web/controllers/api/rpc/contract_controller.ex
@@ -17,6 +17,20 @@ defmodule BlockScoutWeb.API.RPC.ContractController do
 
       render(conn, :verify, %{contract: address})
     else
+      {:publish,
+       {:error,
+        %Ecto.Changeset{
+          errors: [
+            address_hash:
+              {"has already been taken",
+               [
+                 constraint: :unique,
+                 constraint_name: "smart_contracts_address_hash_index"
+               ]}
+          ]
+        }}} ->
+        render(conn, :error, error: "Smart-contract already verified.")
+
       {:publish, _} ->
         render(conn, :error, error: "Something went wrong while publishing the contract.")
 
diff --git a/apps/block_scout_web/lib/block_scout_web/etherscan.ex b/apps/block_scout_web/lib/block_scout_web/etherscan.ex
index f419f05eee..15af9d8823 100644
--- a/apps/block_scout_web/lib/block_scout_web/etherscan.ex
+++ b/apps/block_scout_web/lib/block_scout_web/etherscan.ex
@@ -2029,9 +2029,9 @@ defmodule BlockScoutWeb.Etherscan do
     <div class='tab-pane fade show active'>
     <div class="tile tile-muted p-1">
     <div class="m-2">
-    curl -d '{"addressHash":"0xd6984e092b51337032cf0300c7291e4839be37e1","compilerVersion":"v0.5.4+commit.9549d8ff",
-    "contractSourceCode":"pragma solidity ^0.5.4;\n","name":"Test","optimization":false}'
-    -H "Content-Type: application/json" -X POST  "https://blockscout.com/eth/kovan/api?module=contract&action=verify"
+    curl -d '{"addressHash":"0xc63BB6555C90846afACaC08A0F0Aa5caFCB382a1","compilerVersion":"v0.5.4+commit.9549d8ff",
+    "contractSourceCode":"pragma solidity ^0.5.4; \ncontract Test {\n}","name":"Test","optimization":false}'
+    -H "Content-Type: application/json" -X POST  "https://blockscout.com/poa/sokol/api?module=contract&action=verify"
     </pre>
     </div>
     </div>
diff --git a/apps/block_scout_web/lib/block_scout_web/views/layout_view.ex b/apps/block_scout_web/lib/block_scout_web/views/layout_view.ex
index 051ec77024..03dee8da28 100644
--- a/apps/block_scout_web/lib/block_scout_web/views/layout_view.ex
+++ b/apps/block_scout_web/lib/block_scout_web/views/layout_view.ex
@@ -17,12 +17,7 @@ defmodule BlockScoutWeb.LayoutView do
     },
     %{
       title: "xDai Chain",
-      url: "https://blockscout.com/poa/dai"
-    },
-    %{
-      title: "Kovan Testnet",
-      url: "https://blockscout.com/eth/kovan",
-      test_net?: true
+      url: "https://blockscout.com/poa/xdai"
     },
     %{
       title: "Ethereum Classic",

From d071dc27e9382f70088006a431448472b818ea18 Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Mon, 6 Jul 2020 18:23:58 +0300
Subject: [PATCH 27/34] Apps menu item

---
 .dialyzer-ignore                              |  5 +++--
 CHANGELOG.md                                  |  1 +
 .../assets/css/components/_dropdown.scss      |  6 ++++++
 .../assets/css/components/_navbar.scss        | 15 +++++++++++++++
 apps/block_scout_web/config/config.exs        |  4 +++-
 .../templates/icons/_external_link.html.eex   |  1 +
 .../templates/layout/_topnav.html.eex         | 19 +++++++++++++++++++
 .../lib/block_scout_web/views/layout_view.ex  | 15 +++++++++++++++
 apps/block_scout_web/priv/gettext/default.pot | 13 +++++++++----
 .../priv/gettext/en/LC_MESSAGES/default.po    | 13 +++++++++----
 10 files changed, 81 insertions(+), 11 deletions(-)
 create mode 100644 apps/block_scout_web/lib/block_scout_web/templates/icons/_external_link.html.eex

diff --git a/.dialyzer-ignore b/.dialyzer-ignore
index 78a619e1bf..527272ec2d 100644
--- a/.dialyzer-ignore
+++ b/.dialyzer-ignore
@@ -13,6 +13,7 @@ apps/explorer/lib/explorer/smart_contract/publisher_worker.ex:6: The pattern 'fa
 apps/explorer/lib/explorer/smart_contract/publisher_worker.ex:6: The test 5 == 'infinity' can never evaluate to 'true'
 lib/block_scout_web/router.ex:1
 lib/phoenix/router.ex:324
-lib/block_scout_web/views/layout_view.ex:143
+lib/block_scout_web/views/layout_view.ex:138: The call 'Elixir.Poison.Parser':'parse!'
+lib/block_scout_web/views/layout_view.ex:224: The call 'Elixir.Poison.Parser':'parse!'
 lib/block_scout_web/controllers/api/rpc/transaction_controller.ex:21
-lib/block_scout_web/controllers/api/rpc/transaction_controller.ex:22
\ No newline at end of file
+lib/block_scout_web/controllers/api/rpc/transaction_controller.ex:22
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9597989a84..6708a78be3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
 ## Current
 
 ### Features
+- [#3184](https://github.com/poanetwork/blockscout/pull/3184) - Apps navbar menu item
 
 ### Fixes
 - [#3178](https://github.com/poanetwork/blockscout/pull/3178) - Fix permanent fetching tokens...  when read/write proxy tab is active
diff --git a/apps/block_scout_web/assets/css/components/_dropdown.scss b/apps/block_scout_web/assets/css/components/_dropdown.scss
index a44b5386f9..5264a73902 100644
--- a/apps/block_scout_web/assets/css/components/_dropdown.scss
+++ b/apps/block_scout_web/assets/css/components/_dropdown.scss
@@ -42,6 +42,12 @@ $dropdown-menu-item-hover-background: rgba($secondary, 0.1) !default;
     &:focus {
       background-color: $dropdown-menu-item-hover-background;
       color: $dropdown-menu-item-hover-color;
+
+      .external-link-icon {
+        path {
+          fill: $header-icon-color-hover;
+        }
+      }
     }
   }
 
diff --git a/apps/block_scout_web/assets/css/components/_navbar.scss b/apps/block_scout_web/assets/css/components/_navbar.scss
index 24efbe84f1..d97f0483d5 100644
--- a/apps/block_scout_web/assets/css/components/_navbar.scss
+++ b/apps/block_scout_web/assets/css/components/_navbar.scss
@@ -260,3 +260,18 @@ $navbar-logo-width: auto !default;
     transition: none !important;
   }
 }
+
+.external-link-icon {
+  float: right;
+  margin-top: -1px;
+
+  & {
+    &.active,
+    &:hover,
+    &:focus {
+      path {
+        fill: $header-icon-color-hover;
+      }
+    }
+  }
+}
diff --git a/apps/block_scout_web/config/config.exs b/apps/block_scout_web/config/config.exs
index b5bd4087f6..097995e969 100644
--- a/apps/block_scout_web/config/config.exs
+++ b/apps/block_scout_web/config/config.exs
@@ -32,7 +32,9 @@ config :block_scout_web,
   },
   other_networks: System.get_env("SUPPORTED_CHAINS"),
   webapp_url: System.get_env("WEBAPP_URL"),
-  api_url: System.get_env("API_URL")
+  api_url: System.get_env("API_URL"),
+  apps_menu: if(System.get_env("APPS_MENU", "false") == "true", do: true, else: false),
+  external_apps: System.get_env("EXTERNAL_APPS")
 
 config :block_scout_web, BlockScoutWeb.Counters.BlocksIndexedCounter, enabled: true
 
diff --git a/apps/block_scout_web/lib/block_scout_web/templates/icons/_external_link.html.eex b/apps/block_scout_web/lib/block_scout_web/templates/icons/_external_link.html.eex
new file mode 100644
index 0000000000..5f9f06e568
--- /dev/null
+++ b/apps/block_scout_web/lib/block_scout_web/templates/icons/_external_link.html.eex
@@ -0,0 +1 @@
+<svg height="12pt" viewBox="0 0 12 12" width="12pt" xmlns="http://www.w3.org/2000/svg"><path d="m9.992188 1.496094c-.019532 0-.039063 0-.058594.003906h-2.433594c-.179688-.003906-.347656.09375-.4375.246094-.09375.15625-.09375.351562 0 .507812.089844.152344.257812.25.4375.246094h1.292969l-4.644531 4.648438c-.132813.125-.183594.308593-.140626.484374.046876.175782.183594.3125.359376.359376.175781.042968.359374-.007813.488281-.136719l4.644531-4.648438v1.292969c-.003906.179688.09375.347656.246094.4375.15625.09375.351562.09375.507812 0 .152344-.089844.25-.257812.246094-.4375v-2.4375c.019531-.144531-.023438-.292969-.125-.402344-.097656-.109375-.238281-.167968-.382812-.164062zm-7.492188.003906c-.546875 0-1 .453125-1 1v7c0 .546875.453125 1 1 1h7c.546875 0 1-.453125 1-1v-3c.003906-.179688-.09375-.347656-.246094-.4375-.15625-.09375-.351562-.09375-.507812 0-.152344.089844-.25.257812-.246094.4375v3h-7v-7h3c.179688.003906.347656-.09375.4375-.246094.09375-.15625.09375-.351562 0-.507812-.089844-.152344-.257812-.25-.4375-.246094zm0 0" fill="#333"/></svg>
\ No newline at end of file
diff --git a/apps/block_scout_web/lib/block_scout_web/templates/layout/_topnav.html.eex b/apps/block_scout_web/lib/block_scout_web/templates/layout/_topnav.html.eex
index d54f71fb41..12575322f6 100644
--- a/apps/block_scout_web/lib/block_scout_web/templates/layout/_topnav.html.eex
+++ b/apps/block_scout_web/lib/block_scout_web/templates/layout/_topnav.html.eex
@@ -103,6 +103,25 @@
             </div>
           </li>
         <% end %>
+        <%= if Application.get_env(:block_scout_web, :apps_menu) == true do %>
+          <li class="nav-item dropdown">
+            <a href="#" role="button" id="navbarAppsDropdown" class="nav-link topnav-nav-link dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+              <span class="nav-link-icon">
+                <%= render BlockScoutWeb.IconsView, "_apps_icon.html" %>
+              </span>
+              <%= gettext("Apps") %>
+            </a>
+            <div class="dropdown-menu" aria-labeledby="navbarAppsDropdown"> 
+              <%= for %{url: url, title: title} <- external_apps_list() do %> 
+                  <a href="<%= url%>" class="dropdown-item" target="_blank"><%= title %>
+                    <span class="external-link-icon">
+                      <%= render BlockScoutWeb.IconsView, "_external_link.html" %>
+                    </span>
+                  </a>
+              <% end %>
+            </div>
+          </li>
+        <% end %>
         <li class="nav-item dropdown">
           <a class="nav-link topnav-nav-link active-icon <%= if dropdown_nets() != [], do: "dropdown-toggle js-show-network-selector" %>" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
             <span class="nav-link-icon">
diff --git a/apps/block_scout_web/lib/block_scout_web/views/layout_view.ex b/apps/block_scout_web/lib/block_scout_web/views/layout_view.ex
index 03dee8da28..ab3e02818b 100644
--- a/apps/block_scout_web/lib/block_scout_web/views/layout_view.ex
+++ b/apps/block_scout_web/lib/block_scout_web/views/layout_view.ex
@@ -216,6 +216,21 @@ defmodule BlockScoutWeb.LayoutView do
     end
   end
 
+  def external_apps_list do
+    if Application.get_env(:block_scout_web, :external_apps) do
+      try do
+        :block_scout_web
+        |> Application.get_env(:external_apps)
+        |> Parser.parse!(%{keys: :atoms!})
+      rescue
+        _ ->
+          []
+      end
+    else
+      []
+    end
+  end
+
   defp validate_url(url) when is_binary(url) do
     case URI.parse(url) do
       %URI{host: nil} -> :error
diff --git a/apps/block_scout_web/priv/gettext/default.pot b/apps/block_scout_web/priv/gettext/default.pot
index c4a0a11936..904669752d 100644
--- a/apps/block_scout_web/priv/gettext/default.pot
+++ b/apps/block_scout_web/priv/gettext/default.pot
@@ -1258,14 +1258,14 @@ msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address_logs/index.html.eex:14
-#: lib/block_scout_web/templates/layout/_topnav.html.eex:145
-#: lib/block_scout_web/templates/layout/_topnav.html.eex:162
+#: lib/block_scout_web/templates/layout/_topnav.html.eex:164
+#: lib/block_scout_web/templates/layout/_topnav.html.eex:181
 msgid "Search"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/layout/_topnav.html.eex:139
-#: lib/block_scout_web/templates/layout/_topnav.html.eex:143
+#: lib/block_scout_web/templates/layout/_topnav.html.eex:158
+#: lib/block_scout_web/templates/layout/_topnav.html.eex:162
 msgid "Search by address, token symbol name, transaction hash, or block number"
 msgstr ""
 
@@ -1946,3 +1946,8 @@ msgstr ""
 #: lib/block_scout_web/views/address_view.ex:350
 msgid "Write Proxy"
 msgstr ""
+
+#, elixir-format
+#: lib/block_scout_web/templates/layout/_topnav.html.eex:112
+msgid "Apps"
+msgstr ""
diff --git a/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po b/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po
index c4a0a11936..904669752d 100644
--- a/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po
+++ b/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po
@@ -1258,14 +1258,14 @@ msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address_logs/index.html.eex:14
-#: lib/block_scout_web/templates/layout/_topnav.html.eex:145
-#: lib/block_scout_web/templates/layout/_topnav.html.eex:162
+#: lib/block_scout_web/templates/layout/_topnav.html.eex:164
+#: lib/block_scout_web/templates/layout/_topnav.html.eex:181
 msgid "Search"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/layout/_topnav.html.eex:139
-#: lib/block_scout_web/templates/layout/_topnav.html.eex:143
+#: lib/block_scout_web/templates/layout/_topnav.html.eex:158
+#: lib/block_scout_web/templates/layout/_topnav.html.eex:162
 msgid "Search by address, token symbol name, transaction hash, or block number"
 msgstr ""
 
@@ -1946,3 +1946,8 @@ msgstr ""
 #: lib/block_scout_web/views/address_view.ex:350
 msgid "Write Proxy"
 msgstr ""
+
+#, elixir-format
+#: lib/block_scout_web/templates/layout/_topnav.html.eex:112
+msgid "Apps"
+msgstr ""

From 05ff0494f7fd2a778abd3c9b841c023396d63c1f Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Mon, 6 Jul 2020 19:05:10 +0300
Subject: [PATCH 28/34] Add env vars to Docker setup

---
 docker/Makefile | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/docker/Makefile b/docker/Makefile
index e25b1f8e33..54803b94f0 100644
--- a/docker/Makefile
+++ b/docker/Makefile
@@ -220,6 +220,12 @@ endif
 ifdef TXS_STATS_DAYS_TO_COMPILE_AT_INIT
 	BLOCKSCOUT_CONTAINER_PARAMS += -e 'TXS_STATS_DAYS_TO_COMPILE_AT_INIT=$(TXS_STATS_DAYS_TO_COMPILE_AT_INIT)'
 endif
+ifdef APPS_MENU
+	BLOCKSCOUT_CONTAINER_PARAMS += -e 'APPS_MENU=$(APPS_MENU)'
+endif
+ifdef EXTERNAL_APPS
+	BLOCKSCOUT_CONTAINER_PARAMS += -e 'EXTERNAL_APPS=$(EXTERNAL_APPS)'
+endif
 
 HAS_BLOCKSCOUT_IMAGE := $(shell docker images | grep ${DOCKER_IMAGE})
 build: 

From ac854e698905ba1184527d6ec89e7a244913ff1f Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Wed, 8 Jul 2020 16:52:53 +0300
Subject: [PATCH 29/34] Transaction page: decoding logs from called contracts

---
 .../templates/transaction_log/_logs.html.eex  |  2 +-
 .../views/transaction_log_view.ex             |  4 ++--
 apps/explorer/lib/explorer/chain/log.ex       | 19 +++++++++++++++++++
 3 files changed, 22 insertions(+), 3 deletions(-)

diff --git a/apps/block_scout_web/lib/block_scout_web/templates/transaction_log/_logs.html.eex b/apps/block_scout_web/lib/block_scout_web/templates/transaction_log/_logs.html.eex
index 0d958b938c..df2380b666 100644
--- a/apps/block_scout_web/lib/block_scout_web/templates/transaction_log/_logs.html.eex
+++ b/apps/block_scout_web/lib/block_scout_web/templates/transaction_log/_logs.html.eex
@@ -1,5 +1,5 @@
 <div data-test="transaction_log" class="tile tile-muted">
-  <% decoded_result = decode(@log, @transaction) %>
+  <% decoded_result = decode(@log, @transaction, @log.address) %>
   <%= case decoded_result do %>
     <%= {:error, :contract_not_verified, _cadidates} -> %>
       <div class="alert alert-info">
diff --git a/apps/block_scout_web/lib/block_scout_web/views/transaction_log_view.ex b/apps/block_scout_web/lib/block_scout_web/views/transaction_log_view.ex
index 50d406433c..762908ac18 100644
--- a/apps/block_scout_web/lib/block_scout_web/views/transaction_log_view.ex
+++ b/apps/block_scout_web/lib/block_scout_web/views/transaction_log_view.ex
@@ -4,7 +4,7 @@ defmodule BlockScoutWeb.TransactionLogView do
 
   alias Explorer.Chain.Log
 
-  def decode(log, transaction) do
-    Log.decode(log, transaction)
+  def decode(log, transaction, address) do
+    Log.decode(log, transaction, address)
   end
 end
diff --git a/apps/explorer/lib/explorer/chain/log.ex b/apps/explorer/lib/explorer/chain/log.ex
index 9592f0b2dd..063796f734 100644
--- a/apps/explorer/lib/explorer/chain/log.ex
+++ b/apps/explorer/lib/explorer/chain/log.ex
@@ -148,6 +148,25 @@ defmodule Explorer.Chain.Log do
     end
   end
 
+  def decode(log, transaction, %Address{hash: address_hash}) do
+    address_options = [
+      necessity_by_association: %{
+        :smart_contract => :optional
+      }
+    ]
+
+    with {:ok, %{smart_contract: %{abi: abi}}} <- Chain.find_contract_address(address_hash, address_options, true) do
+      full_abi = Chain.combine_proxy_implementation_abi(address_hash, abi)
+
+      with {:ok, selector, mapping} <- find_and_decode(full_abi, log, transaction),
+           identifier <- Base.encode16(selector.method_id, case: :lower),
+           text <- function_call(selector.function, mapping),
+           do: {:ok, identifier, text, mapping}
+    end
+  end
+
+  def decode(_log, _transaction, nil), do: {:error, :no_to_address}
+
   defp find_candidates(method_id, log, transaction) do
     candidates_query =
       from(

From 2b65e1c671dd884e23727eb675336230073b7cc7 Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Wed, 8 Jul 2020 17:12:26 +0300
Subject: [PATCH 30/34] Add HCANGELOG entry

---
 CHANGELOG.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6708a78be3..f4a918d2ae 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@
 - [#3184](https://github.com/poanetwork/blockscout/pull/3184) - Apps navbar menu item
 
 ### Fixes
+- [#3185](https://github.com/poanetwork/blockscout/pull/3185) - Transaction page: decoding logs from nested contracts calls
 - [#3178](https://github.com/poanetwork/blockscout/pull/3178) - Fix permanent fetching tokens...  when read/write proxy tab is active
 - [#3178](https://github.com/poanetwork/blockscout/pull/3178) - Fix unavailable navbar menu when read/write proxy tab is active
 

From 20f3aab0cb4f94012a37c81a0017d019105e986a Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Thu, 9 Jul 2020 16:13:33 +0300
Subject: [PATCH 31/34] Address logs decoding fix

---
 .../templates/transaction_log/_logs.html.eex  |  2 +-
 .../views/transaction_log_view.ex             |  4 +-
 apps/explorer/lib/explorer/chain/log.ex       | 51 ++++++++-----------
 .../explorer/test/explorer/chain/log_test.exs | 35 ++++++-------
 4 files changed, 42 insertions(+), 50 deletions(-)

diff --git a/apps/block_scout_web/lib/block_scout_web/templates/transaction_log/_logs.html.eex b/apps/block_scout_web/lib/block_scout_web/templates/transaction_log/_logs.html.eex
index df2380b666..0d958b938c 100644
--- a/apps/block_scout_web/lib/block_scout_web/templates/transaction_log/_logs.html.eex
+++ b/apps/block_scout_web/lib/block_scout_web/templates/transaction_log/_logs.html.eex
@@ -1,5 +1,5 @@
 <div data-test="transaction_log" class="tile tile-muted">
-  <% decoded_result = decode(@log, @transaction, @log.address) %>
+  <% decoded_result = decode(@log, @transaction) %>
   <%= case decoded_result do %>
     <%= {:error, :contract_not_verified, _cadidates} -> %>
       <div class="alert alert-info">
diff --git a/apps/block_scout_web/lib/block_scout_web/views/transaction_log_view.ex b/apps/block_scout_web/lib/block_scout_web/views/transaction_log_view.ex
index 762908ac18..50d406433c 100644
--- a/apps/block_scout_web/lib/block_scout_web/views/transaction_log_view.ex
+++ b/apps/block_scout_web/lib/block_scout_web/views/transaction_log_view.ex
@@ -4,7 +4,7 @@ defmodule BlockScoutWeb.TransactionLogView do
 
   alias Explorer.Chain.Log
 
-  def decode(log, transaction, address) do
-    Log.decode(log, transaction, address)
+  def decode(log, transaction) do
+    Log.decode(log, transaction)
   end
 end
diff --git a/apps/explorer/lib/explorer/chain/log.ex b/apps/explorer/lib/explorer/chain/log.ex
index 063796f734..7887fb0be0 100644
--- a/apps/explorer/lib/explorer/chain/log.ex
+++ b/apps/explorer/lib/explorer/chain/log.ex
@@ -119,25 +119,35 @@ defmodule Explorer.Chain.Log do
   @doc """
   Decode transaction log data.
   """
-  def decode(_log, %Transaction{to_address: nil}), do: {:error, :no_to_address}
 
-  def decode(log, transaction = %Transaction{to_address: %{smart_contract: %{abi: abi, address_hash: address_hash}}})
-      when not is_nil(abi) do
-    full_abi = Chain.combine_proxy_implementation_abi(address_hash, abi)
+  def decode(log, transaction) do
+    address_options = [
+      necessity_by_association: %{
+        :smart_contract => :optional
+      }
+    ]
 
-    with {:ok, selector, mapping} <- find_and_decode(full_abi, log, transaction),
-         identifier <- Base.encode16(selector.method_id, case: :lower),
-         text <- function_call(selector.function, mapping),
-         do: {:ok, identifier, text, mapping}
+    case Chain.find_contract_address(log.address_hash, address_options, true) do
+      {:ok, %{smart_contract: %{abi: abi}}} ->
+        full_abi = Chain.combine_proxy_implementation_abi(log.address_hash, abi)
+
+        with {:ok, selector, mapping} <- find_and_decode(full_abi, log, transaction),
+             identifier <- Base.encode16(selector.method_id, case: :lower),
+             text <- function_call(selector.function, mapping),
+             do: {:ok, identifier, text, mapping}
+
+      _ ->
+        find_candidates(log, transaction)
+    end
   end
 
-  def decode(log, transaction) do
+  defp find_candidates(log, transaction) do
     case log.first_topic do
       "0x" <> hex_part ->
         case Integer.parse(hex_part, 16) do
           {number, ""} ->
             <<method_id::binary-size(4), _rest::binary>> = :binary.encode_unsigned(number)
-            find_candidates(method_id, log, transaction)
+            find_candidates_query(method_id, log, transaction)
 
           _ ->
             {:error, :could_not_decode}
@@ -148,26 +158,7 @@ defmodule Explorer.Chain.Log do
     end
   end
 
-  def decode(log, transaction, %Address{hash: address_hash}) do
-    address_options = [
-      necessity_by_association: %{
-        :smart_contract => :optional
-      }
-    ]
-
-    with {:ok, %{smart_contract: %{abi: abi}}} <- Chain.find_contract_address(address_hash, address_options, true) do
-      full_abi = Chain.combine_proxy_implementation_abi(address_hash, abi)
-
-      with {:ok, selector, mapping} <- find_and_decode(full_abi, log, transaction),
-           identifier <- Base.encode16(selector.method_id, case: :lower),
-           text <- function_call(selector.function, mapping),
-           do: {:ok, identifier, text, mapping}
-    end
-  end
-
-  def decode(_log, _transaction, nil), do: {:error, :no_to_address}
-
-  defp find_candidates(method_id, log, transaction) do
+  defp find_candidates_query(method_id, log, transaction) do
     candidates_query =
       from(
         contract_method in ContractMethod,
diff --git a/apps/explorer/test/explorer/chain/log_test.exs b/apps/explorer/test/explorer/chain/log_test.exs
index 3619476f6c..e0f0fa7c14 100644
--- a/apps/explorer/test/explorer/chain/log_test.exs
+++ b/apps/explorer/test/explorer/chain/log_test.exs
@@ -58,29 +58,29 @@ defmodule Explorer.Chain.LogTest do
     end
 
     test "that a contract call transaction that has a verified contract returns the decoded input data" do
-      smart_contract =
-        insert(:smart_contract,
-          abi: [
-            %{
-              "anonymous" => false,
-              "inputs" => [
-                %{"indexed" => true, "name" => "_from_human", "type" => "string"},
-                %{"indexed" => false, "name" => "_number", "type" => "uint256"},
-                %{"indexed" => true, "name" => "_belly", "type" => "bool"}
-              ],
-              "name" => "WantsPets",
-              "type" => "event"
-            }
-          ]
-        )
+      to_address = insert(:address, contract_code: "0x")
+
+      insert(:smart_contract,
+        abi: [
+          %{
+            "anonymous" => false,
+            "inputs" => [
+              %{"indexed" => true, "name" => "_from_human", "type" => "string"},
+              %{"indexed" => false, "name" => "_number", "type" => "uint256"},
+              %{"indexed" => true, "name" => "_belly", "type" => "bool"}
+            ],
+            "name" => "WantsPets",
+            "type" => "event"
+          }
+        ],
+        address_hash: to_address.hash
+      )
 
       topic1 = "0x" <> Base.encode16(:keccakf1600.hash(:sha3_256, "WantsPets(string,uint256,bool)"), case: :lower)
       topic2 = "0x" <> Base.encode16(:keccakf1600.hash(:sha3_256, "bob"), case: :lower)
       topic3 = "0x0000000000000000000000000000000000000000000000000000000000000001"
       data = "0x0000000000000000000000000000000000000000000000000000000000000000"
 
-      to_address = insert(:address, smart_contract: smart_contract)
-
       transaction =
         :transaction_to_verified_contract
         |> insert(to_address: to_address)
@@ -88,6 +88,7 @@ defmodule Explorer.Chain.LogTest do
 
       log =
         insert(:log,
+          address: to_address,
           transaction: transaction,
           first_topic: topic1,
           second_topic: topic2,

From de143d9bebf5c75c718e23e271c5dae1b15821c1 Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Fri, 10 Jul 2020 12:06:23 +0300
Subject: [PATCH 32/34] Improve decode log/method view

---
 .../templates/transaction_log/_logs.html.eex  | 25 ++++++++--------
 apps/block_scout_web/priv/gettext/default.pot | 30 +++++++++----------
 .../priv/gettext/en/LC_MESSAGES/default.po    | 30 +++++++++----------
 3 files changed, 42 insertions(+), 43 deletions(-)

diff --git a/apps/block_scout_web/lib/block_scout_web/templates/transaction_log/_logs.html.eex b/apps/block_scout_web/lib/block_scout_web/templates/transaction_log/_logs.html.eex
index 0d958b938c..cd30449d7a 100644
--- a/apps/block_scout_web/lib/block_scout_web/templates/transaction_log/_logs.html.eex
+++ b/apps/block_scout_web/lib/block_scout_web/templates/transaction_log/_logs.html.eex
@@ -50,17 +50,19 @@
             </tr>
           </table>
           <div class="table-responsive text-center">
-            <table style="color: black;" summary="<%= gettext "Log Data" %>" class="table thead-light table-bordered">
+            <table style="color: black;width: 100%;table-layout: fixed;" summary="<%= gettext "Log Data" %>" class="table thead-light table-bordered">
               <tr>
-                <th scope="col"></th>
-                <th scope="col"><%= gettext "Name" %></th>
-                <th scope="col"><%= gettext "Type" %></th>
-                <th scope="col"><%= gettext "Indexed?" %></th>
+                <th scope="col" style="width: 100px;"><%= gettext "Name" %></th>
+                <th scope="col" style="width: 100px;"><%= gettext "Type" %></th>
+                <th scope="col" style="width: 75px;"><%= gettext "Indexed?" %></th>
                 <th scope="col"><%= gettext "Data" %></th>
               <tr>
             <%= for {name, type, indexed?, value} <- mapping do %>
                 <tr>
-                  <th scope="row">
+                  <td><%= name %></td>
+                  <td><%= type %></td>
+                  <td><%= indexed? %></td>
+                  <td align=left>
                     <%= case BlockScoutWeb.ABIEncodedValueView.copy_text(type, value) do %>
                       <% :error -> %>
                         <%= nil %>
@@ -71,18 +73,14 @@
                           data-clipboard-text="<%= copy_text %>"
                           data-placement="top"
                           data-toggle="tooltip"
+                          style="float: left;height:20px"
                         >
-                          <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32.5 32.5" width="32" height="32">
+                          <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32.5 32.5" width="25" height="25">
                             <path fill-rule="evenodd" d="M23.5 20.5a1 1 0 0 1-1-1v-9h-9a1 1 0 0 1 0-2h10a1 1 0 0 1 1 1v10a1 1 0 0 1-1 1zm-3-7v10a1 1 0 0 1-1 1h-10a1 1 0 0 1-1-1v-10a1 1 0 0 1 1-1h10a1 1 0 0 1 1 1zm-2 1h-8v8h8v-8z"/>
                           </svg>
                         </span>
                     <% end %>
-                  </th>
-                  <td><%= name %></td>
-                  <td><%= type %></td>
-                  <td><%= indexed? %></td>
-                  <td>
-                    <pre class="transaction-input-text tile"><code><%= BlockScoutWeb.ABIEncodedValueView.value_html(type, value) %></code></pre>
+                    <pre class="transaction-input-text pre-wrap" style="display: inline"><code><%= BlockScoutWeb.ABIEncodedValueView.value_html(type, value) %></code></pre>
                   </td>
                 </tr>
             <% end %>
@@ -194,4 +192,5 @@
       </div>
     </dd>
   </dl>
+  <script defer data-cfasync="false" src="<%= static_path(@conn, "/js/decoded-view-data-toggle.js") %>"></script>
 </div>
diff --git a/apps/block_scout_web/priv/gettext/default.pot b/apps/block_scout_web/priv/gettext/default.pot
index 904669752d..8f1016a187 100644
--- a/apps/block_scout_web/priv/gettext/default.pot
+++ b/apps/block_scout_web/priv/gettext/default.pot
@@ -451,8 +451,8 @@ msgstr ""
 #: lib/block_scout_web/templates/address_logs/_logs.html.eex:66
 #: lib/block_scout_web/templates/address_logs/_logs.html.eex:119
 #: lib/block_scout_web/templates/transaction/_decoded_input_body.html.eex:31
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:69
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:122
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:71
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:120
 msgid "Copy Value"
 msgstr ""
 
@@ -482,9 +482,9 @@ msgstr ""
 #: lib/block_scout_web/templates/address_logs/_logs.html.eex:109
 #: lib/block_scout_web/templates/address_logs/_logs.html.eex:175
 #: lib/block_scout_web/templates/transaction/_decoded_input_body.html.eex:21
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:59
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:112
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:179
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:58
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:110
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:177
 msgid "Data"
 msgstr ""
 
@@ -494,7 +494,7 @@ msgstr ""
 #: lib/block_scout_web/templates/address_logs/_logs.html.eex:90
 #: lib/block_scout_web/templates/transaction_log/_logs.html.eex:32
 #: lib/block_scout_web/templates/transaction_log/_logs.html.eex:40
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:93
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:91
 msgid "Decoded"
 msgstr ""
 
@@ -935,8 +935,8 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/address_logs/_logs.html.eex:55
 #: lib/block_scout_web/templates/address_logs/_logs.html.eex:108
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:58
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:111
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:57
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:109
 msgid "Indexed?"
 msgstr ""
 
@@ -1028,7 +1028,7 @@ msgstr ""
 #: lib/block_scout_web/templates/address_logs/_logs.html.eex:50
 #: lib/block_scout_web/templates/address_logs/_logs.html.eex:103
 #: lib/block_scout_web/templates/transaction_log/_logs.html.eex:53
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:106
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:104
 msgid "Log Data"
 msgstr ""
 
@@ -1094,8 +1094,8 @@ msgstr ""
 #: lib/block_scout_web/templates/api_docs/_action_tile.html.eex:52
 #: lib/block_scout_web/templates/api_docs/_eth_rpc_item.html.eex:59
 #: lib/block_scout_web/templates/transaction/_decoded_input_body.html.eex:19
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:56
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:109
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:55
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:107
 msgid "Name"
 msgstr ""
 
@@ -1456,7 +1456,7 @@ msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address_logs/_logs.html.eex:145
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:149
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:147
 msgid "Topics"
 msgstr ""
 
@@ -1516,8 +1516,8 @@ msgstr ""
 #: lib/block_scout_web/templates/address_logs/_logs.html.eex:54
 #: lib/block_scout_web/templates/address_logs/_logs.html.eex:107
 #: lib/block_scout_web/templates/transaction/_decoded_input_body.html.eex:20
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:57
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:110
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:56
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:108
 msgid "Type"
 msgstr ""
 
@@ -1776,7 +1776,7 @@ msgid "Loading chart"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:189
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:187
 msgid "Log Index"
 msgstr ""
 
diff --git a/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po b/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po
index 904669752d..8f1016a187 100644
--- a/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po
+++ b/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po
@@ -451,8 +451,8 @@ msgstr ""
 #: lib/block_scout_web/templates/address_logs/_logs.html.eex:66
 #: lib/block_scout_web/templates/address_logs/_logs.html.eex:119
 #: lib/block_scout_web/templates/transaction/_decoded_input_body.html.eex:31
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:69
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:122
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:71
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:120
 msgid "Copy Value"
 msgstr ""
 
@@ -482,9 +482,9 @@ msgstr ""
 #: lib/block_scout_web/templates/address_logs/_logs.html.eex:109
 #: lib/block_scout_web/templates/address_logs/_logs.html.eex:175
 #: lib/block_scout_web/templates/transaction/_decoded_input_body.html.eex:21
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:59
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:112
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:179
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:58
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:110
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:177
 msgid "Data"
 msgstr ""
 
@@ -494,7 +494,7 @@ msgstr ""
 #: lib/block_scout_web/templates/address_logs/_logs.html.eex:90
 #: lib/block_scout_web/templates/transaction_log/_logs.html.eex:32
 #: lib/block_scout_web/templates/transaction_log/_logs.html.eex:40
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:93
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:91
 msgid "Decoded"
 msgstr ""
 
@@ -935,8 +935,8 @@ msgstr ""
 #, elixir-format
 #: lib/block_scout_web/templates/address_logs/_logs.html.eex:55
 #: lib/block_scout_web/templates/address_logs/_logs.html.eex:108
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:58
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:111
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:57
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:109
 msgid "Indexed?"
 msgstr ""
 
@@ -1028,7 +1028,7 @@ msgstr ""
 #: lib/block_scout_web/templates/address_logs/_logs.html.eex:50
 #: lib/block_scout_web/templates/address_logs/_logs.html.eex:103
 #: lib/block_scout_web/templates/transaction_log/_logs.html.eex:53
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:106
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:104
 msgid "Log Data"
 msgstr ""
 
@@ -1094,8 +1094,8 @@ msgstr ""
 #: lib/block_scout_web/templates/api_docs/_action_tile.html.eex:52
 #: lib/block_scout_web/templates/api_docs/_eth_rpc_item.html.eex:59
 #: lib/block_scout_web/templates/transaction/_decoded_input_body.html.eex:19
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:56
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:109
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:55
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:107
 msgid "Name"
 msgstr ""
 
@@ -1456,7 +1456,7 @@ msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address_logs/_logs.html.eex:145
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:149
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:147
 msgid "Topics"
 msgstr ""
 
@@ -1516,8 +1516,8 @@ msgstr ""
 #: lib/block_scout_web/templates/address_logs/_logs.html.eex:54
 #: lib/block_scout_web/templates/address_logs/_logs.html.eex:107
 #: lib/block_scout_web/templates/transaction/_decoded_input_body.html.eex:20
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:57
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:110
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:56
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:108
 msgid "Type"
 msgstr ""
 
@@ -1776,7 +1776,7 @@ msgid "Loading chart"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:189
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:187
 msgid "Log Index"
 msgstr ""
 

From 83c794b4e4324dbb14ae80127077d47ff6d8270b Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Fri, 10 Jul 2020 12:17:30 +0300
Subject: [PATCH 33/34] Add CHANGELOG entry

---
 CHANGELOG.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index f4a918d2ae..034605b333 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@
 - [#3184](https://github.com/poanetwork/blockscout/pull/3184) - Apps navbar menu item
 
 ### Fixes
+- [#3190](https://github.com/poanetwork/blockscout/pull/3190) - Contract log/method decoded view improvements: eliminate horizontal scroll, remove excess borders, whitespaces
 - [#3185](https://github.com/poanetwork/blockscout/pull/3185) - Transaction page: decoding logs from nested contracts calls
 - [#3178](https://github.com/poanetwork/blockscout/pull/3178) - Fix permanent fetching tokens...  when read/write proxy tab is active
 - [#3178](https://github.com/poanetwork/blockscout/pull/3178) - Fix unavailable navbar menu when read/write proxy tab is active

From 06e0232d619fc7601f75dc62a352902e84c6f88b Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Fri, 10 Jul 2020 13:27:46 +0300
Subject: [PATCH 34/34] Refine decoding view of contract method, log on
 transaction page, refactoring

---
 .../templates/address_logs/_logs.html.eex     | 79 +------------------
 .../templates/log/_data_decoded_view.html.eex | 37 +++++++++
 .../transaction/_decoded_input_body.html.eex  | 42 +++++-----
 .../templates/transaction_log/_logs.html.eex  | 79 +------------------
 .../lib/block_scout_web/views/log_view.ex     |  3 +
 apps/block_scout_web/priv/gettext/default.pot | 54 +++++--------
 .../priv/gettext/en/LC_MESSAGES/default.po    | 54 +++++--------
 7 files changed, 100 insertions(+), 248 deletions(-)
 create mode 100644 apps/block_scout_web/lib/block_scout_web/templates/log/_data_decoded_view.html.eex
 create mode 100644 apps/block_scout_web/lib/block_scout_web/views/log_view.ex

diff --git a/apps/block_scout_web/lib/block_scout_web/templates/address_logs/_logs.html.eex b/apps/block_scout_web/lib/block_scout_web/templates/address_logs/_logs.html.eex
index 945049ace6..870c61310b 100644
--- a/apps/block_scout_web/lib/block_scout_web/templates/address_logs/_logs.html.eex
+++ b/apps/block_scout_web/lib/block_scout_web/templates/address_logs/_logs.html.eex
@@ -46,45 +46,7 @@
               <td colspan="3"><code><%= text %></code></td>
             </tr>
           </table>
-          <div class="table-responsive text-center">
-            <table style="color: black;" summary="<%= gettext "Log Data" %>" class="table thead-light table-bordered">
-              <tr>
-                <th scope="col"></th>
-                <th scope="col"><%= gettext "Name" %></th>
-                <th scope="col"><%= gettext "Type" %></th>
-                <th scope="col"><%= gettext "Indexed?" %></th>
-                <th scope="col"><%= gettext "Data" %></th>
-              <tr>
-            <%= for {name, type, indexed?, value} <- mapping do %>
-                <tr>
-                  <th scope="row">
-                    <%= case BlockScoutWeb.ABIEncodedValueView.copy_text(type, value) do %>
-                      <% :error -> %>
-                        <%= nil %>
-                      <% copy_text -> %>
-                        <span
-                          aria-label='<%= gettext "Copy Value" %>'
-                          class="btn-copy-ico"
-                          data-clipboard-text="<%= copy_text %>"
-                          data-placement="top"
-                          data-toggle="tooltip"
-                        >
-                          <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32.5 32.5" width="32" height="32">
-                            <path fill-rule="evenodd" d="M23.5 20.5a1 1 0 0 1-1-1v-9h-9a1 1 0 0 1 0-2h10a1 1 0 0 1 1 1v10a1 1 0 0 1-1 1zm-3-7v10a1 1 0 0 1-1 1h-10a1 1 0 0 1-1-1v-10a1 1 0 0 1 1-1h10a1 1 0 0 1 1 1zm-2 1h-8v8h8v-8z"/>
-                          </svg>
-                        </span>
-                    <% end %>
-                  </th>
-                  <td><%= name %></td>
-                  <td><%= type %></td>
-                  <td><%= indexed? %></td>
-                  <td>
-                    <pre class="transaction-input-text tile"><code><%= BlockScoutWeb.ABIEncodedValueView.value_html(type, value) %></code></pre>
-                  </td>
-                </tr>
-            <% end %>
-         </table>
-        </div>
+          <%= render BlockScoutWeb.LogView, "_data_decoded_view.html", mapping: mapping %>
         <% {:error, :contract_not_verified, results} -> %>
            <%= for {:ok, method_id, text, mapping} <- results do %>
              <dt class="col-md-2"><%= gettext "Decoded" %></dt>
@@ -99,44 +61,7 @@
                  <td colspan="3"><code><%= text %></code></td>
                </tr>
              </table>
-             <div class="table-responsive text-center">
-               <table style="color: black;" summary="<%= gettext "Log Data" %>" class="table thead-light table-bordered">
-                 <tr>
-                   <th scope="col"></th>
-                   <th scope="col"><%= gettext "Name" %></th>
-                   <th scope="col"><%= gettext "Type" %></th>
-                   <th scope="col"><%= gettext "Indexed?" %></th>
-                   <th scope="col"><%= gettext "Data" %></th>
-                 <tr>
-               <%= for {name, type, indexed?, value} <- mapping do %>
-                   <tr>
-                     <th scope="row">
-                       <%= case BlockScoutWeb.ABIEncodedValueView.copy_text(type, value) do %>
-                         <% :error -> %>
-                           <%= nil %>
-                         <% copy_text -> %>
-                           <span
-                             aria-label='<%= gettext "Copy Value" %>'
-                             class="btn-copy-ico"
-                             data-clipboard-text="<%= copy_text %>"
-                             data-placement="top"
-                             data-toggle="tooltip"
-                           >
-                             <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32.5 32.5" width="32" height="32">
-                               <path fill-rule="evenodd" d="M23.5 20.5a1 1 0 0 1-1-1v-9h-9a1 1 0 0 1 0-2h10a1 1 0 0 1 1 1v10a1 1 0 0 1-1 1zm-3-7v10a1 1 0 0 1-1 1h-10a1 1 0 0 1-1-1v-10a1 1 0 0 1 1-1h10a1 1 0 0 1 1 1zm-2 1h-8v8h8v-8z"/>
-                             </svg>
-                           </span>
-                       <% end %>
-                     </th>
-                     <td><%= name %></td>
-                     <td><%= type %></td>
-                     <td><%= indexed? %></td>
-                     <td>
-                       <pre class="transaction-input-text tile"><code><%= BlockScoutWeb.ABIEncodedValueView.value_html(type, value) %></code></pre>
-                     </td>
-                   </tr>
-               <% end %>
-            </table>
+             <%= render BlockScoutWeb.LogView, "_data_decoded_view.html", mapping: mapping %>
          </div>
         <% end %>
        <% _ -> %>
diff --git a/apps/block_scout_web/lib/block_scout_web/templates/log/_data_decoded_view.html.eex b/apps/block_scout_web/lib/block_scout_web/templates/log/_data_decoded_view.html.eex
new file mode 100644
index 0000000000..3c0fdaaa59
--- /dev/null
+++ b/apps/block_scout_web/lib/block_scout_web/templates/log/_data_decoded_view.html.eex
@@ -0,0 +1,37 @@
+<div class="table-responsive text-center">
+    <table style="color: black;table-layout: fixed;" summary="<%= gettext "Log Data" %>" class="table thead-light table-bordered">
+        <tr>
+        <th scope="col" style="width: 110px;"><%= gettext "Name" %></th>
+        <th scope="col" style="width: 100px;"><%= gettext "Type" %></th>
+        <th scope="col" style="width: 75px;"><%= gettext "Indexed?" %></th>
+        <th scope="col"><%= gettext "Data" %></th>
+        <tr>
+    <%= for {name, type, indexed?, value} <- @mapping do %>
+        <tr>
+            <td><%= name %></td>
+            <td><%= type %></td>
+            <td><%= indexed? %></td>
+            <td align=left>
+            <%= case BlockScoutWeb.ABIEncodedValueView.copy_text(type, value) do %>
+                <% :error -> %>
+                    <%= nil %>
+                <% copy_text -> %>
+                    <span
+                        aria-label='<%= gettext "Copy Value" %>'
+                        class="btn-copy-ico"
+                        data-clipboard-text="<%= copy_text %>"
+                        data-placement="top"
+                        data-toggle="tooltip"
+                        style="float: left;height: 20px;"
+                    >
+                        <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32.5 32.5" width="25" height="25">
+                        <path fill-rule="evenodd" d="M23.5 20.5a1 1 0 0 1-1-1v-9h-9a1 1 0 0 1 0-2h10a1 1 0 0 1 1 1v10a1 1 0 0 1-1 1zm-3-7v10a1 1 0 0 1-1 1h-10a1 1 0 0 1-1-1v-10a1 1 0 0 1 1-1h10a1 1 0 0 1 1 1zm-2 1h-8v8h8v-8z"/>
+                        </svg>
+                    </span>
+            <% end %>
+            <pre class="transaction-input-text pre-wrap"><code><%= BlockScoutWeb.ABIEncodedValueView.value_html(type, value) %></code></pre>
+            </td>
+        </tr>
+    <% end %>
+    </table>
+</div>
\ No newline at end of file
diff --git a/apps/block_scout_web/lib/block_scout_web/templates/transaction/_decoded_input_body.html.eex b/apps/block_scout_web/lib/block_scout_web/templates/transaction/_decoded_input_body.html.eex
index 7f3b04aa86..0efca70238 100644
--- a/apps/block_scout_web/lib/block_scout_web/templates/transaction/_decoded_input_body.html.eex
+++ b/apps/block_scout_web/lib/block_scout_web/templates/transaction/_decoded_input_body.html.eex
@@ -15,41 +15,39 @@
   <div class="table-responsive text-center">
     <table style="color: black; table-layout: fixed;" summary="<%= gettext "Transaction Inputs" %>" class="table thead-light table-bordered">
       <tr>
-      <th scope="col" style="width: 60px;"></th>
       <th scope="col" style="width: 10%;"><%= gettext "Name" %></th>
       <th scope="col" style="width: 10%;"><%= gettext "Type" %></th>
       <th scope="col"><%= gettext "Data" %></th>
       <tr>
       <%= for {name, type, value} <- @mapping do %>
         <tr>
-          <th scope="row">
-            <%= case BlockScoutWeb.ABIEncodedValueView.copy_text(type, value) do %>
-              <% :error -> %>
-                <%= nil %>
-              <% copy_text -> %>
-                <span
-                  aria-label='<%= gettext "Copy Value" %>'
-                  class="btn-copy-ico"
-                  data-clipboard-text='<%= copy_text %>'
-                  data-placement="top"
-                  data-toggle="tooltip"
-                >
-                  <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32.5 32.5" width="32" height="32">
-                    <path fill-rule="evenodd" d="M23.5 20.5a1 1 0 0 1-1-1v-9h-9a1 1 0 0 1 0-2h10a1 1 0 0 1 1 1v10a1 1 0 0 1-1 1zm-3-7v10a1 1 0 0 1-1 1h-10a1 1 0 0 1-1-1v-10a1 1 0 0 1 1-1h10a1 1 0 0 1 1 1zm-2 1h-8v8h8v-8z"/>
-                  </svg>
-                </span>
-            <% end %>
-          </th>
           <td><%= name %></td>
           <td><%= type %></td>
-          <td>
+          <td align=left>
             <%= case BlockScoutWeb.ABIEncodedValueView.value_html(type, value) do %>
               <% :error -> %>
                 <div class="alert alert-danger">
                   <%= gettext "Error rendering value" %>
                 </div>
-              <% value -> %>
-                <pre class="transaction-input-text tile pre-wrap"><code><%= value %></code></pre>
+              <% _value -> %>
+                <%= case BlockScoutWeb.ABIEncodedValueView.copy_text(type, value) do %>
+                  <% :error -> %>
+                    <%= nil %>
+                  <% copy_text -> %>
+                    <span
+                      aria-label='<%= gettext "Copy Value" %>'
+                      class="btn-copy-ico"
+                      data-clipboard-text='<%= copy_text %>'
+                      data-placement="top"
+                      data-toggle="tooltip"
+                      style="float: left;height: 20px;"
+                    >
+                      <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32.5 32.5" width="25" height="25">
+                        <path fill-rule="evenodd" d="M23.5 20.5a1 1 0 0 1-1-1v-9h-9a1 1 0 0 1 0-2h10a1 1 0 0 1 1 1v10a1 1 0 0 1-1 1zm-3-7v10a1 1 0 0 1-1 1h-10a1 1 0 0 1-1-1v-10a1 1 0 0 1 1-1h10a1 1 0 0 1 1 1zm-2 1h-8v8h8v-8z"/>
+                      </svg>
+                    </span>
+                <% end %>
+                <pre class="transaction-input-text pre-wrap" style="margin-bottom: 0px;"><code style="line-height: 25px;"><%= BlockScoutWeb.ABIEncodedValueView.value_html(type, value) %></code></pre>
               <% end %>
           </td>
         </tr>
diff --git a/apps/block_scout_web/lib/block_scout_web/templates/transaction_log/_logs.html.eex b/apps/block_scout_web/lib/block_scout_web/templates/transaction_log/_logs.html.eex
index cd30449d7a..01b479e2bf 100644
--- a/apps/block_scout_web/lib/block_scout_web/templates/transaction_log/_logs.html.eex
+++ b/apps/block_scout_web/lib/block_scout_web/templates/transaction_log/_logs.html.eex
@@ -49,43 +49,7 @@
               <td colspan="3"><code><%= text %></code></td>
             </tr>
           </table>
-          <div class="table-responsive text-center">
-            <table style="color: black;width: 100%;table-layout: fixed;" summary="<%= gettext "Log Data" %>" class="table thead-light table-bordered">
-              <tr>
-                <th scope="col" style="width: 100px;"><%= gettext "Name" %></th>
-                <th scope="col" style="width: 100px;"><%= gettext "Type" %></th>
-                <th scope="col" style="width: 75px;"><%= gettext "Indexed?" %></th>
-                <th scope="col"><%= gettext "Data" %></th>
-              <tr>
-            <%= for {name, type, indexed?, value} <- mapping do %>
-                <tr>
-                  <td><%= name %></td>
-                  <td><%= type %></td>
-                  <td><%= indexed? %></td>
-                  <td align=left>
-                    <%= case BlockScoutWeb.ABIEncodedValueView.copy_text(type, value) do %>
-                      <% :error -> %>
-                        <%= nil %>
-                      <% copy_text -> %>
-                        <span
-                          aria-label='<%= gettext "Copy Value" %>'
-                          class="btn-copy-ico"
-                          data-clipboard-text="<%= copy_text %>"
-                          data-placement="top"
-                          data-toggle="tooltip"
-                          style="float: left;height:20px"
-                        >
-                          <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32.5 32.5" width="25" height="25">
-                            <path fill-rule="evenodd" d="M23.5 20.5a1 1 0 0 1-1-1v-9h-9a1 1 0 0 1 0-2h10a1 1 0 0 1 1 1v10a1 1 0 0 1-1 1zm-3-7v10a1 1 0 0 1-1 1h-10a1 1 0 0 1-1-1v-10a1 1 0 0 1 1-1h10a1 1 0 0 1 1 1zm-2 1h-8v8h8v-8z"/>
-                          </svg>
-                        </span>
-                    <% end %>
-                    <pre class="transaction-input-text pre-wrap" style="display: inline"><code><%= BlockScoutWeb.ABIEncodedValueView.value_html(type, value) %></code></pre>
-                  </td>
-                </tr>
-            <% end %>
-            </table>
-            </div>
+          <%= render BlockScoutWeb.LogView, "_data_decoded_view.html", mapping: mapping %>
           <% {:error, :contract_not_verified, results} -> %>
              <%= for {:ok, method_id, text, mapping} <- results do %>
                <dt class="col-md-2"><%= gettext "Decoded" %></dt>
@@ -100,45 +64,7 @@
                    <td colspan="3"><code><%= text %></code></td>
                  </tr>
                </table>
-               <div class="table-responsive text-center">
-                 <table style="color: black;" summary="<%= gettext "Log Data" %>" class="table thead-light table-bordered">
-                   <tr>
-                     <th scope="col"></th>
-                     <th scope="col"><%= gettext "Name" %></th>
-                     <th scope="col"><%= gettext "Type" %></th>
-                     <th scope="col"><%= gettext "Indexed?" %></th>
-                     <th scope="col"><%= gettext "Data" %></th>
-                   <tr>
-                 <%= for {name, type, indexed?, value} <- mapping do %>
-                     <tr>
-                       <th scope="row">
-                         <%= case BlockScoutWeb.ABIEncodedValueView.copy_text(type, value) do %>
-                           <% :error -> %>
-                             <%= nil %>
-                           <% copy_text -> %>
-                             <span
-                               aria-label='<%= gettext "Copy Value" %>'
-                               class="btn-copy-ico"
-                               data-clipboard-text="<%= copy_text %>"
-                               data-placement="top"
-                               data-toggle="tooltip"
-                             >
-                               <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32.5 32.5" width="32" height="32">
-                                 <path fill-rule="evenodd" d="M23.5 20.5a1 1 0 0 1-1-1v-9h-9a1 1 0 0 1 0-2h10a1 1 0 0 1 1 1v10a1 1 0 0 1-1 1zm-3-7v10a1 1 0 0 1-1 1h-10a1 1 0 0 1-1-1v-10a1 1 0 0 1 1-1h10a1 1 0 0 1 1 1zm-2 1h-8v8h8v-8z"/>
-                               </svg>
-                             </span>
-                         <% end %>
-                       </th>
-                       <td><%= name %></td>
-                       <td><%= type %></td>
-                       <td><%= indexed? %></td>
-                       <td>
-                         <pre class="transaction-input-text tile"><code><%= BlockScoutWeb.ABIEncodedValueView.value_html(type, value) %></code></pre>
-                       </td>
-                     </tr>
-                 <% end %>
-              </table>
-           </div>
+               <%= render BlockScoutWeb.LogView, "_data_decoded_view.html", mapping: mapping %>
           <% end %>
         <% _ -> %>
           <%= nil %>
@@ -192,5 +118,4 @@
       </div>
     </dd>
   </dl>
-  <script defer data-cfasync="false" src="<%= static_path(@conn, "/js/decoded-view-data-toggle.js") %>"></script>
 </div>
diff --git a/apps/block_scout_web/lib/block_scout_web/views/log_view.ex b/apps/block_scout_web/lib/block_scout_web/views/log_view.ex
new file mode 100644
index 0000000000..fe12ba9cce
--- /dev/null
+++ b/apps/block_scout_web/lib/block_scout_web/views/log_view.ex
@@ -0,0 +1,3 @@
+defmodule BlockScoutWeb.LogView do
+  use BlockScoutWeb, :view
+end
diff --git a/apps/block_scout_web/priv/gettext/default.pot b/apps/block_scout_web/priv/gettext/default.pot
index 8f1016a187..772a87c386 100644
--- a/apps/block_scout_web/priv/gettext/default.pot
+++ b/apps/block_scout_web/priv/gettext/default.pot
@@ -448,11 +448,8 @@ msgid "Difficulty"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/address_logs/_logs.html.eex:66
-#: lib/block_scout_web/templates/address_logs/_logs.html.eex:119
-#: lib/block_scout_web/templates/transaction/_decoded_input_body.html.eex:31
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:71
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:120
+#: lib/block_scout_web/templates/log/_data_decoded_view.html.eex:20
+#: lib/block_scout_web/templates/transaction/_decoded_input_body.html.eex:38
 msgid "Copy Value"
 msgstr ""
 
@@ -478,23 +475,20 @@ msgid "Curl"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/address_logs/_logs.html.eex:56
-#: lib/block_scout_web/templates/address_logs/_logs.html.eex:109
-#: lib/block_scout_web/templates/address_logs/_logs.html.eex:175
-#: lib/block_scout_web/templates/transaction/_decoded_input_body.html.eex:21
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:58
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:110
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:177
+#: lib/block_scout_web/templates/address_logs/_logs.html.eex:100
+#: lib/block_scout_web/templates/log/_data_decoded_view.html.eex:7
+#: lib/block_scout_web/templates/transaction/_decoded_input_body.html.eex:20
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:103
 msgid "Data"
 msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address_logs/_logs.html.eex:31
 #: lib/block_scout_web/templates/address_logs/_logs.html.eex:37
-#: lib/block_scout_web/templates/address_logs/_logs.html.eex:90
+#: lib/block_scout_web/templates/address_logs/_logs.html.eex:52
 #: lib/block_scout_web/templates/transaction_log/_logs.html.eex:32
 #: lib/block_scout_web/templates/transaction_log/_logs.html.eex:40
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:91
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:55
 msgid "Decoded"
 msgstr ""
 
@@ -605,7 +599,7 @@ msgid "Enter the Solidity Contract Code"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/transaction/_decoded_input_body.html.eex:49
+#: lib/block_scout_web/templates/transaction/_decoded_input_body.html.eex:30
 msgid "Error rendering value"
 msgstr ""
 
@@ -933,10 +927,7 @@ msgid "If you have just submitted this transaction please wait for at least 30 s
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/address_logs/_logs.html.eex:55
-#: lib/block_scout_web/templates/address_logs/_logs.html.eex:108
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:57
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:109
+#: lib/block_scout_web/templates/log/_data_decoded_view.html.eex:6
 msgid "Indexed?"
 msgstr ""
 
@@ -1025,10 +1016,7 @@ msgid "Loading...."
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/address_logs/_logs.html.eex:50
-#: lib/block_scout_web/templates/address_logs/_logs.html.eex:103
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:53
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:104
+#: lib/block_scout_web/templates/log/_data_decoded_view.html.eex:2
 msgid "Log Data"
 msgstr ""
 
@@ -1089,13 +1077,10 @@ msgid "Must be set to:"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/address_logs/_logs.html.eex:53
-#: lib/block_scout_web/templates/address_logs/_logs.html.eex:106
 #: lib/block_scout_web/templates/api_docs/_action_tile.html.eex:52
 #: lib/block_scout_web/templates/api_docs/_eth_rpc_item.html.eex:59
-#: lib/block_scout_web/templates/transaction/_decoded_input_body.html.eex:19
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:55
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:107
+#: lib/block_scout_web/templates/log/_data_decoded_view.html.eex:4
+#: lib/block_scout_web/templates/transaction/_decoded_input_body.html.eex:18
 msgid "Name"
 msgstr ""
 
@@ -1455,8 +1440,8 @@ msgid "Topic"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/address_logs/_logs.html.eex:145
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:147
+#: lib/block_scout_web/templates/address_logs/_logs.html.eex:70
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:73
 msgid "Topics"
 msgstr ""
 
@@ -1513,11 +1498,8 @@ msgid "Twitter"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/address_logs/_logs.html.eex:54
-#: lib/block_scout_web/templates/address_logs/_logs.html.eex:107
-#: lib/block_scout_web/templates/transaction/_decoded_input_body.html.eex:20
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:56
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:108
+#: lib/block_scout_web/templates/log/_data_decoded_view.html.eex:5
+#: lib/block_scout_web/templates/transaction/_decoded_input_body.html.eex:19
 msgid "Type"
 msgstr ""
 
@@ -1776,7 +1758,7 @@ msgid "Loading chart"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:187
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:113
 msgid "Log Index"
 msgstr ""
 
diff --git a/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po b/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po
index 8f1016a187..772a87c386 100644
--- a/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po
+++ b/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po
@@ -448,11 +448,8 @@ msgid "Difficulty"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/address_logs/_logs.html.eex:66
-#: lib/block_scout_web/templates/address_logs/_logs.html.eex:119
-#: lib/block_scout_web/templates/transaction/_decoded_input_body.html.eex:31
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:71
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:120
+#: lib/block_scout_web/templates/log/_data_decoded_view.html.eex:20
+#: lib/block_scout_web/templates/transaction/_decoded_input_body.html.eex:38
 msgid "Copy Value"
 msgstr ""
 
@@ -478,23 +475,20 @@ msgid "Curl"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/address_logs/_logs.html.eex:56
-#: lib/block_scout_web/templates/address_logs/_logs.html.eex:109
-#: lib/block_scout_web/templates/address_logs/_logs.html.eex:175
-#: lib/block_scout_web/templates/transaction/_decoded_input_body.html.eex:21
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:58
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:110
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:177
+#: lib/block_scout_web/templates/address_logs/_logs.html.eex:100
+#: lib/block_scout_web/templates/log/_data_decoded_view.html.eex:7
+#: lib/block_scout_web/templates/transaction/_decoded_input_body.html.eex:20
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:103
 msgid "Data"
 msgstr ""
 
 #, elixir-format
 #: lib/block_scout_web/templates/address_logs/_logs.html.eex:31
 #: lib/block_scout_web/templates/address_logs/_logs.html.eex:37
-#: lib/block_scout_web/templates/address_logs/_logs.html.eex:90
+#: lib/block_scout_web/templates/address_logs/_logs.html.eex:52
 #: lib/block_scout_web/templates/transaction_log/_logs.html.eex:32
 #: lib/block_scout_web/templates/transaction_log/_logs.html.eex:40
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:91
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:55
 msgid "Decoded"
 msgstr ""
 
@@ -605,7 +599,7 @@ msgid "Enter the Solidity Contract Code"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/transaction/_decoded_input_body.html.eex:49
+#: lib/block_scout_web/templates/transaction/_decoded_input_body.html.eex:30
 msgid "Error rendering value"
 msgstr ""
 
@@ -933,10 +927,7 @@ msgid "If you have just submitted this transaction please wait for at least 30 s
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/address_logs/_logs.html.eex:55
-#: lib/block_scout_web/templates/address_logs/_logs.html.eex:108
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:57
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:109
+#: lib/block_scout_web/templates/log/_data_decoded_view.html.eex:6
 msgid "Indexed?"
 msgstr ""
 
@@ -1025,10 +1016,7 @@ msgid "Loading...."
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/address_logs/_logs.html.eex:50
-#: lib/block_scout_web/templates/address_logs/_logs.html.eex:103
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:53
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:104
+#: lib/block_scout_web/templates/log/_data_decoded_view.html.eex:2
 msgid "Log Data"
 msgstr ""
 
@@ -1089,13 +1077,10 @@ msgid "Must be set to:"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/address_logs/_logs.html.eex:53
-#: lib/block_scout_web/templates/address_logs/_logs.html.eex:106
 #: lib/block_scout_web/templates/api_docs/_action_tile.html.eex:52
 #: lib/block_scout_web/templates/api_docs/_eth_rpc_item.html.eex:59
-#: lib/block_scout_web/templates/transaction/_decoded_input_body.html.eex:19
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:55
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:107
+#: lib/block_scout_web/templates/log/_data_decoded_view.html.eex:4
+#: lib/block_scout_web/templates/transaction/_decoded_input_body.html.eex:18
 msgid "Name"
 msgstr ""
 
@@ -1455,8 +1440,8 @@ msgid "Topic"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/address_logs/_logs.html.eex:145
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:147
+#: lib/block_scout_web/templates/address_logs/_logs.html.eex:70
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:73
 msgid "Topics"
 msgstr ""
 
@@ -1513,11 +1498,8 @@ msgid "Twitter"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/address_logs/_logs.html.eex:54
-#: lib/block_scout_web/templates/address_logs/_logs.html.eex:107
-#: lib/block_scout_web/templates/transaction/_decoded_input_body.html.eex:20
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:56
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:108
+#: lib/block_scout_web/templates/log/_data_decoded_view.html.eex:5
+#: lib/block_scout_web/templates/transaction/_decoded_input_body.html.eex:19
 msgid "Type"
 msgstr ""
 
@@ -1776,7 +1758,7 @@ msgid "Loading chart"
 msgstr ""
 
 #, elixir-format
-#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:187
+#: lib/block_scout_web/templates/transaction_log/_logs.html.eex:113
 msgid "Log Index"
 msgstr ""