Add created_contract_address_hash to transaction detail overview

Co-authored-by: Timothy Mecklem <timothy@mecklem.com>
Co-authored-by: jimmay5469 <jimmay5469@gmail.com>

apps/explorer/lib/explorer/chain.ex

@@ -583,8 +583,21 @@ defmodule Explorer.Chain do
     |> join_associations(necessity_by_association)
     |> Repo.one()
     |> case do
-      nil -> {:error, :not_found}
-      transaction -> {:ok, transaction}
+      nil ->
+        {:error, :not_found}
+
+      transaction = %Transaction{to_address: nil} ->
+        internal_transaction =
+          InternalTransaction
+          |> join(:inner, [internal_transaction], transaction in assoc(internal_transaction, :transaction))
+          |> where([_, transaction], transaction.hash == ^hash)
+          |> where([internal_transaction], internal_transaction.type == ^:create)
+          |> Repo.one!()
+
+        {:ok, %{transaction | created_contract_address_hash: internal_transaction.created_contract_address_hash}}
+
+      transaction ->
+        {:ok, transaction}
     end
   end
 

apps/explorer/lib/explorer/chain/internal_transaction.ex

@@ -28,6 +28,8 @@ defmodule Explorer.Chain.InternalTransaction do
   """
   @type t :: %__MODULE__{
           call_type: CallType.t() | nil,
+          created_contract_address: %Ecto.Association.NotLoaded{} | Address.t(),
+          created_contract_address_hash: Explorer.Chain.Hash.t(),
           created_contract_code: Data.t() | nil,
           error: String.t(),
           from_address: %Ecto.Association.NotLoaded{} | Address.t(),

apps/explorer/lib/explorer/chain/transaction.ex

@@ -154,6 +154,7 @@ defmodule Explorer.Chain.Transaction do
     field(:status, Status)
     field(:v, :integer)
     field(:value, Wei)
+    field(:created_contract_address_hash, Hash.Truncated, virtual: true)
 
     timestamps()
 

apps/explorer_web/lib/explorer_web/templates/transaction/overview.html.eex

@@ -73,15 +73,11 @@
                   <%= gettext "From" %>
                 </th>
                 <td>
-                  <%= if @transaction.from_address do %>
                   <%= link(
                         @transaction.from_address,
                         class: "transaction__link",
                         to: address_path(@conn, :show, @conn.assigns.locale, @transaction.from_address)
                       ) %>
-                  <% else %>
-                    <%= gettext "Pending" %>
-                  <% end %>
                 </td>
               </tr>
               <tr>
@@ -96,7 +92,12 @@
                           to: address_path(@conn, :show, @conn.assigns.locale, @transaction.to_address)
                         ) %>
                   <% else %>
-                    <%= gettext "Pending" %>
+                    [Contract <%= link(
+                      @transaction.created_contract_address_hash,
+                      class: "transaction__link",
+                      "data-test": "created_contract_address_hash",
+                      to: address_path(@conn, :show, @conn.assigns.locale, @transaction.created_contract_address_hash)
+                    ) %> Created]
                   <% end %>
                 </td>
               </tr>

apps/explorer_web/test/explorer_web/controllers/transaction_internal_transaction_controller_test.exs

@@ -58,5 +58,14 @@ defmodule ExplorerWeb.TransactionInternalTransactionControllerTest do
 
       assert %Token{} = conn.assigns.exchange_rate
     end
+
+    test "with no to_address_hash overview contains contract create address", %{conn: conn} do
+      transaction = insert(:transaction, to_address_hash: nil)
+      insert(:internal_transaction_create, transaction_hash: transaction.hash, index: 0)
+
+      conn = get(conn, transaction_internal_transaction_path(ExplorerWeb.Endpoint, :index, :en, transaction.hash))
+
+      refute is_nil(conn.assigns.transaction.created_contract_address_hash)
+    end
   end
 end

apps/explorer_web/test/explorer_web/features/pages/transaction_page.ex

@@ -5,7 +5,7 @@ defmodule ExplorerWeb.TransactionPage do
 
   import Wallaby.Query, only: [css: 1, css: 2]
 
-  alias Explorer.Chain.{Transaction, Hash}
+  alias Explorer.Chain.{InternalTransaction, Transaction, Hash}
 
   def click_logs(session) do
     click(session, css("[data-test='transaction_logs_link']"))
@@ -15,6 +15,10 @@ defmodule ExplorerWeb.TransactionPage do
     css("[data-test='transaction_detail_hash']", text: Hash.to_string(transaction_hash))
   end
 
+  def contract_creation_address_hash(%InternalTransaction{created_contract_address_hash: hash}) do
+    css("[data-test='created_contract_address_hash']", text: Hash.to_string(hash))
+  end
+
   def visit_page(session, %Transaction{hash: transaction_hash}) do
     visit(session, "/en/transactions/#{transaction_hash}")
   end

apps/explorer_web/test/explorer_web/features/viewing_transactions_test.exs

@@ -106,6 +106,15 @@ defmodule ExplorerWeb.ViewingTransactionsTest do
       |> assert_has(TransactionPage.detail_hash(transaction))
     end
 
+    test "can see a contract creation address in to_address", %{session: session} do
+      transaction = insert(:transaction, to_address_hash: nil)
+      internal_transaction = insert(:internal_transaction_create, transaction_hash: transaction.hash, index: 0)
+
+      session
+      |> TransactionPage.visit_page(transaction)
+      |> assert_has(TransactionPage.contract_creation_address_hash(internal_transaction))
+    end
+
     test "can view a transaction's logs", %{session: session, transaction: transaction} do
       session
       |> TransactionPage.visit_page(transaction)