log token instances fetching to a separate file

apps/explorer/config/dev.exs

@@ -18,6 +18,11 @@ config :logger, :reading_token_functions,
   path: Path.absname("logs/dev/explorer/tokens/reading_functions.log"),
   metadata_filter: [fetcher: :token_functions]
 
+config :logger, :token_instances,
+  level: :debug,
+  path: Path.absname("logs/dev/explorer/tokens/token_instances.log"),
+  metadata_filter: [fetcher: :token_instances]
+
 import_config "dev.secret.exs"
 
 variant =

apps/explorer/config/prod.exs

@@ -21,6 +21,12 @@ config :logger, :reading_token_functions,
   metadata_filter: [fetcher: :token_functions],
   rotate: %{max_bytes: 52_428_800, keep: 19}
 
+config :logger, :token_instances,
+  level: :debug,
+  path: Path.absname("logs/prod/explorer/tokens/token_instances.log"),
+  metadata_filter: [fetcher: :token_instances],
+  rotate: %{max_bytes: 52_428_800, keep: 19}
+
 variant =
   if is_nil(System.get_env("ETHEREUM_JSONRPC_VARIANT")) do
     "parity"

apps/explorer/lib/explorer/token/instance_metadata_retriever.ex

@@ -70,7 +70,9 @@ defmodule Explorer.Token.InstanceMetadataRetriever do
     fetch_json(%{"tokenURI" => {:ok, [decoded_json]}})
   rescue
     e ->
-      Logger.error(fn -> ["Unknown metadata format #{inspect(json)}. error #{inspect(e)}"] end)
+      Logger.error(["Unknown metadata format #{inspect(json)}. error #{inspect(e)}"],
+        fetcher: :token_instances
+      )
 
       {:error, json}
   end
@@ -81,13 +83,15 @@ defmodule Explorer.Token.InstanceMetadataRetriever do
     {:ok, %{metadata: json}}
   rescue
     e ->
-      Logger.error(fn -> ["Unknown metadata format #{inspect(json)}. error #{inspect(e)}"] end)
+      Logger.error(["Unknown metadata format #{inspect(json)}. error #{inspect(e)}"],
+        fetcher: :token_instances
+      )
 
       {:error, json}
   end
 
   def fetch_json(result) do
-    Logger.error(fn -> ["Unknown metadata format #{inspect(result)}."] end)
+    Logger.error(["Unknown metadata format #{inspect(result)}."], fetcher: :token_instances)
 
     {:error, result}
   end
@@ -107,7 +111,9 @@ defmodule Explorer.Token.InstanceMetadataRetriever do
     end
   rescue
     e ->
-      Logger.error(fn -> ["Could not send request to token uri #{inspect(token_uri)}. error #{inspect(e)}"] end)
+      Logger.error(["Could not send request to token uri #{inspect(token_uri)}. error #{inspect(e)}"],
+        fetcher: :token_instances
+      )
 
       {:error, :request_error}
   end

apps/indexer/lib/indexer/fetcher/token_instance.ex

@@ -72,14 +72,15 @@ defmodule Indexer.Fetcher.TokenInstance do
         {:ok, _result} = Chain.upsert_token_instance(params)
 
       result ->
-        Logger.error(fn ->
+        Logger.error(
           [
             "failed to fetch token instance metadata for #{
               inspect({to_string(token_contract_address_hash), Decimal.to_integer(token_id)})
             }: ",
             inspect(result)
-          ]
-        end)
+          ],
+          fetcher: :token_instances
+        )
 
         :ok
     end

config/config.exs

@@ -26,8 +26,7 @@ config :logger,
     # only :indexer, but all levels
     {LoggerFileBackend, :indexer},
     {LoggerFileBackend, :indexer_token_balances},
-    {LoggerFileBackend, :failed_contract_creations},
-    {LoggerFileBackend, :addresses_without_code},
+    {LoggerFileBackend, :token_instances},
     {LoggerFileBackend, :reading_token_functions}
   ]