finish erc20 info

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

@@ -138,7 +138,8 @@
       </div>
     </div>
 
-    <%= if erc20_token_transfer?(@transaction) do %>
+    <% token_transfer = erc20_token_transfer(@transaction, @token_transfers) %>
+    <%= if token_transfer do %>
       <div class="col-md-12 col-lg-4 d-flex flex-column flex-md-row flex-lg-column">
         <!-- Value -->
         <div class="card card-primary flex-grow-1">
@@ -146,9 +147,11 @@
             <h2 class="card-title text-white"><%= gettext "ERC-20" %> <%= gettext "Token Transfer" %></h2>
             <div class="text-right">
               <h3 class="text-white">
-                <%= erc20_token_transfer_params(@transaction, @token_transfers) %>
+                <span class="col-12 col-md-7 ml-3 ml-sm-0">
+                  <%= token_transfer_amount(token_transfer) %>
+                  <%= link(token_symbol(token_transfer.token), to: token_path(BlockScoutWeb.Endpoint, :show, token_transfer.token.contract_address_hash)) %>
+                </span>
               </h3>
-              <span class="text-white text-faded" data-wei-value=<%= @transaction.value.value %> data-usd-exchange-rate=<%= @exchange_rate.usd_value %>></span>
             </div>
           </div>
       </div>

apps/block_scout_web/lib/block_scout_web/views/transaction_view.ex

@@ -11,6 +11,7 @@ defmodule BlockScoutWeb.TransactionView do
   alias Timex.Duration
 
   import BlockScoutWeb.Gettext
+  import BlockScoutWeb.Tokens.Helpers
 
   @tabs ["token_transfers", "internal_transactions", "logs"]
 
@@ -32,45 +33,43 @@ defmodule BlockScoutWeb.TransactionView do
 
   def value_transfer?(_), do: false
 
-  def erc20_token_transfer?(%Transaction{
-        status: :ok,
-        created_contract_address_hash: nil,
-        input: input
-      }) do
-    case to_string(input) do
-      unquote(TokenTransfer.transfer_function_signature()) <> params ->
+  def erc20_token_transfer(
+        %Transaction{
+          status: :ok,
+          created_contract_address_hash: nil,
+          input: input,
+          value: value
+        },
+        token_transfers
+      ) do
+    zero_wei = %Wei{value: Decimal.new(0)}
+
+    case {to_string(input), value} do
+      {unquote(TokenTransfer.transfer_function_signature()) <> params, ^zero_wei} ->
         types = [:address, {:uint, 256}]
 
         try do
-          [_address, _value] =
+          [address, value] =
             params
             |> Base.decode16!(case: :mixed)
             |> TypeDecoder.decode_raw(types)
 
-          true
+          decimal_value = Decimal.new(value)
+
+          Enum.find(token_transfers, fn token_transfer ->
+            token_transfer.to_address_hash.bytes == address && token_transfer.amount == decimal_value
+          end)
         rescue
-          _ -> false
+          _ -> nil
         end
 
       _ ->
-        false
+        nil
     end
   end
 
-  def erc20_token_transfer?(_) do
-    false
-  end
-
-  def erc20_token_transfer_params(transaction, _token_transfers) do
-    types = [:address, {:uint, 256}]
-    unquote(TokenTransfer.transfer_function_signature()) <> params = to_string(transaction.input)
-
-    [_address, value] =
-      params
-      |> Base.decode16!(case: :mixed)
-      |> TypeDecoder.decode_raw(types)
-
-    Wei.to(%Wei{value: Decimal.new(value)}, :ether)
+  def erc20_token_transfer(_, _) do
+    nil
   end
 
   def processing_time_duration(%Transaction{block: nil}) do