Merge pull request #2410 from poanetwork/ab-preload-smart-contract-for-logs-decoding

preload smart contract for logs decoding

CHANGELOG.md

@@ -9,6 +9,7 @@
 - [#2294](https://github.com/poanetwork/blockscout/pull/2294) - add healthy block period checking endpoint
 
 ### Fixes
+- [#2410](https://github.com/poanetwork/blockscout/pull/2410) - preload smart contract for logs decoding
 - [#2398](https://github.com/poanetwork/blockscout/pull/2398) - show only one decoded candidate
 - [#2395](https://github.com/poanetwork/blockscout/pull/2395) - new block loading animation
 - [#2389](https://github.com/poanetwork/blockscout/pull/2389) - Reduce Lodash lib size (86% of lib methods are not used)

apps/block_scout_web/lib/block_scout_web/controllers/transaction_log_controller.ex

@@ -11,7 +11,9 @@ defmodule BlockScoutWeb.TransactionLogController do
   def index(conn, %{"transaction_id" => transaction_hash_string, "type" => "JSON"} = params) do
     with {:ok, transaction_hash} <- Chain.string_to_transaction_hash(transaction_hash_string),
          {:ok, transaction} <-
-           Chain.hash_to_transaction(transaction_hash) do
+           Chain.hash_to_transaction(transaction_hash,
+             necessity_by_association: %{[to_address: :smart_contract] => :optional}
+           ) do
       full_options =
         Keyword.merge(
           [