chore: Reverse internal transactions fetching order (#10912)

* chore: Reverse internal transactions fetching order

* Add env var for internal transactions fetching order

apps/explorer/lib/explorer/chain.ex

@@ -1899,12 +1899,14 @@ defmodule Explorer.Chain do
         when accumulator: term()
   def stream_blocks_with_unfetched_internal_transactions(initial, reducer, limited? \\ false)
       when is_function(reducer, 2) do
+    direction = Application.get_env(:indexer, :internal_transactions_fetch_order)
+
     query =
       from(
         po in PendingBlockOperation,
         where: not is_nil(po.block_number),
         select: po.block_number,
-        order_by: [desc: po.block_number]
+        order_by: [{^direction, po.block_number}]
       )
 
     query

config/runtime.exs

@@ -681,7 +681,9 @@ config :indexer,
     ConfigHelper.parse_integer_env_var("INDEXER_TOKEN_BALANCES_FETCHER_INIT_QUERY_LIMIT", 100_000),
   coin_balances_fetcher_init_limit:
     ConfigHelper.parse_integer_env_var("INDEXER_COIN_BALANCES_FETCHER_INIT_QUERY_LIMIT", 2000),
-  graceful_shutdown_period: ConfigHelper.parse_time_env_var("INDEXER_GRACEFUL_SHUTDOWN_PERIOD", "5m")
+  graceful_shutdown_period: ConfigHelper.parse_time_env_var("INDEXER_GRACEFUL_SHUTDOWN_PERIOD", "5m"),
+  internal_transactions_fetch_order:
+    ConfigHelper.parse_catalog_value("INDEXER_INTERNAL_TRANSACTIONS_FETCH_ORDER", ["asc", "desc"], true, "asc")
 
 config :indexer, :ipfs,
   gateway_url: System.get_env("IPFS_GATEWAY_URL", "https://ipfs.io/ipfs"),

docker-compose/envs/common-blockscout.env

@@ -279,6 +279,7 @@ INDEXER_DISABLE_INTERNAL_TRANSACTIONS_FETCHER=false
 # INDEXER_TOKEN_BALANCES_FETCHER_INIT_QUERY_LIMIT=
 # INDEXER_COIN_BALANCES_FETCHER_INIT_QUERY_LIMIT=
 # INDEXER_GRACEFUL_SHUTDOWN_PERIOD=
+# INDEXER_INTERNAL_TRANSACTIONS_FETCH_ORDER=
 # WITHDRAWALS_FIRST_BLOCK=
 # INDEXER_OPTIMISM_L1_RPC=
 # INDEXER_OPTIMISM_L1_SYSTEM_CONFIG_CONTRACT=