Handle nil token_ids in token transfers on render (#9143)

CHANGELOG.md

@@ -15,6 +15,7 @@
 ### Fixes
 
 - [#9229](https://github.com/blockscout/blockscout/pull/9229) - Add missing filter to txlist query
+- [#9143](https://github.com/blockscout/blockscout/pull/9143) - Handle nil token_ids in token transfers on render
 - [#9139](https://github.com/blockscout/blockscout/pull/9139) - TokenBalanceOnDemand fixes
 - [#9178](https://github.com/blockscout/blockscout/pull/9178) - Change internal txs tracer type to opcode for Hardhat node
 - [#9125](https://github.com/blockscout/blockscout/pull/9125) - Fix Explorer.Chain.Cache.GasPriceOracle.merge_fees

apps/block_scout_web/lib/block_scout_web/views/api/v2/transaction_view.ex

@@ -246,16 +246,25 @@ defmodule BlockScoutWeb.API.V2.TransactionView do
     }
   end
 
+  # credo:disable-for-next-line /Complexity/
   def prepare_token_transfer_total(token_transfer) do
     case TokensHelper.token_transfer_amount_for_api(token_transfer) do
       {:ok, :erc721_instance} ->
-        %{"token_id" => List.first(token_transfer.token_ids)}
+        %{"token_id" => token_transfer.token_ids && List.first(token_transfer.token_ids)}
 
       {:ok, :erc1155_instance, value, decimals} ->
-        %{"token_id" => List.first(token_transfer.token_ids), "value" => value, "decimals" => decimals}
+        %{
+          "token_id" => token_transfer.token_ids && List.first(token_transfer.token_ids),
+          "value" => value,
+          "decimals" => decimals
+        }
 
       {:ok, :erc1155_instance, values, token_ids, decimals} ->
-        %{"token_id" => List.first(token_ids), "value" => List.first(values), "decimals" => decimals}
+        %{
+          "token_id" => token_ids && List.first(token_ids),
+          "value" => values && List.first(values),
+          "decimals" => decimals
+        }
 
       {:ok, value, decimals} ->
         %{"value" => value, "decimals" => decimals}

apps/explorer/lib/explorer/account/notifier/summary.ex

@@ -132,7 +132,7 @@ defmodule Explorer.Account.Notifier.Summary do
           from_address_hash: transfer.from_address_hash,
           to_address_hash: transfer.to_address_hash,
           block_number: transfer.block_number,
-          subject: to_string(List.first(transfer.token_ids)),
+          subject: to_string(transfer.token_ids && List.first(transfer.token_ids)),
           tx_fee: fee(transaction),
           name: transfer.token.name,
           type: transfer.token.type
@@ -191,6 +191,8 @@ defmodule Explorer.Account.Notifier.Summary do
     )
   end
 
+  def token_ids(%Chain.TokenTransfer{token_ids: nil}), do: ""
+
   def token_ids(%Chain.TokenTransfer{token_ids: token_ids}) do
     Enum.map_join(token_ids, ", ", fn id -> to_string(id) end)
   end