Add a new log file for token_balances fetching errors

apps/indexer/config/dev.exs

@@ -4,6 +4,11 @@ config :logger, :indexer,
   level: :debug,
   path: Path.absname("logs/dev/indexer.log")
 
+config :logger, :indexer_token_balances,
+  level: :debug,
+  path: Path.absname("logs/dev/indexer/token_balances/error.log"),
+  metadata_filter: [fetcher: :token_balances]
+
 variant =
   if is_nil(System.get_env("ETHEREUM_JSONRPC_VARIANT")) do
     "parity"

apps/indexer/config/prod.exs

@@ -4,6 +4,11 @@ config :logger, :indexer,
   level: :info,
   path: Path.absname("logs/prod/indexer.log")
 
+config :logger, :indexer_token_balances,
+  level: :debug,
+  path: Path.absname("logs/prod/indexer/token_balances/error.log"),
+  metadata_filter: [fetcher: :token_balances]
+
 variant =
   if is_nil(System.get_env("ETHEREUM_JSONRPC_VARIANT")) do
     "parity"

apps/indexer/config/test.exs

@@ -3,3 +3,8 @@ use Mix.Config
 config :logger, :indexer,
   level: :warn,
   path: Path.absname("logs/test/indexer.log")
+
+config :logger, :indexer_token_balances,
+  level: :debug,
+  path: Path.absname("logs/test/indexer/token_balances/error.log"),
+  metadata_filter: [fetcher: :token_balances]

config/config.exs

@@ -24,7 +24,8 @@ config :logger,
     # only :explorer, but all levels
     {LoggerFileBackend, :explorer},
     # only :indexer, but all levels
-    {LoggerFileBackend, :indexer}
+    {LoggerFileBackend, :indexer},
+    {LoggerFileBackend, :indexer_token_balances}
   ]
 
 config :logger, :console,