Merge branch 'master' into fix-displayed-address-length

README.md

@@ -245,6 +245,22 @@ To view Modules and API Reference documentation:
 2. View the generated docs.  
 `open doc/index.html`
 
+## Front-end 
+
+### Javascript
+
+All Javascript files are under [apps/block_scout_web/assets/js](https://github.com/poanetwork/blockscout/tree/master/apps/block_scout_web/assets/js) and the main file is [app.js](https://github.com/poanetwork/blockscout/blob/master/apps/block_scout_web/assets/js/app.js). This file imports all javascript used in the application. If you want to create a new JS file consider creating into [/js/pages](https://github.com/poanetwork/blockscout/tree/master/apps/block_scout_web/assets/js/pages) or [/js/lib](https://github.com/poanetwork/blockscout/tree/master/apps/block_scout_web/assets/js/lib), as follows:
+
+#### js/lib
+This folder contains all scripts that can be reused in any page or can be used as a helper to some component.
+
+#### js/pages
+This folder contains the scripts that are specific for some page.
+
+#### Redux
+This project uses Redux to control the state in some pages. There are pages that have things happening in real-time thanks to the Phoenix channels, e.g. Address page, so the page state changes a lot depending on which events it is listening. The redux is also used to load some contents asynchronous, see [async_listing_load.js](https://github.com/poanetwork/blockscout/blob/master/apps/block_scout_web/assets/js/lib/async_listing_load.js).
+
+To understand how to build new pages that need redux in this project, see the [redux_helpers.js](https://github.com/poanetwork/blockscout/blob/master/apps/block_scout_web/assets/js/lib/redux_helpers.js)
 
 ## Internationalization
 

apps/block_scout_web/assets/js/lib/redux_helpers.js

@@ -2,10 +2,99 @@ import $ from 'jquery'
 import _ from 'lodash'
 import { createStore as reduxCreateStore } from 'redux'
 
+/**
+ * Create a redux store given the reducer. It also enables the Redux dev tools.
+ */
 export function createStore (reducer) {
   return reduxCreateStore(reducer, window.__REDUX_DEVTOOLS_EXTENSION__ && window.__REDUX_DEVTOOLS_EXTENSION__())
 }
 
+/**
+ * Connect elements with the redux store. It must receive an object with the following attributes:
+ *
+ * elements: It is an object with elements that are going to react to the redux state or add something
+ * to the initial state.
+ *
+ * ```javascript
+ * const elements = {
+ *    // The JQuery selector for finding elements in the page.
+ *   '[data-counter]': {
+ *      // Useful to put things from the page to the redux state.
+ *      load ($element) {...},
+ *      // Check for state changes and manipulates the DOM accordingly.
+ *      render ($el, state, oldState) {...}
+ *   }
+ * }
+ * ```
+ *
+ * The load and render functions are optional, you can have both or just one of them. It depends
+ * on if you want to load something to the state in the first render and/or that the element should
+ * react to the redux state. Notice that you can include more elements if you want to since elements
+ * also is an object.
+ *
+ * store: It is the redux store that the elements should be connected with.
+ * ```javascript
+ * const store = createStore(reducer)
+ * ```
+ *
+ * action: The first action that the store is going to dispatch. Optional, by default 'ELEMENTS_LOAD'
+ * is going to be dispatched.
+ *
+ * ### Examples
+ *
+ * Given the markup:
+ * ```HTML
+ * <div data-counter>
+ *   <span class="number">1</span>
+ * </div>
+ * ```
+ *
+ * The reducer:
+ * ```javascript
+ * function reducer (state = { number: null }, action) {
+ *   switch (action.type) {
+ *     case 'ELEMENTS_LOAD': {
+ *       return Object.assign({}, state, { number: action.number })
+ *     }
+ *     case 'INCREMENT': {
+ *       return Object.assign({}, state, { number: state.number + 1 })
+ *     }
+ *     default:
+ *       return state
+ *   }
+ * }
+ * ```
+ *
+ * The elements:
+ * ```javascript
+ * const elements = {
+ *    // '[data-counter]' is the element that will be connected to the redux store.
+ *   '[data-counter]': {
+ *      // Find the number within data-counter and add to the state.
+ *      load ($el) {
+ *        return { number: $el.find('.number').val() }
+ *      },
+ *      // React to redux state. Case the number in the state changes, it is going to render the
+ *      // new number.
+ *      render ($el, state, oldState) {
+ *        if (state.number === oldState.number) return
+ *
+ *        $el.html(state.number)
+ *      }
+ *   }
+ * }
+ *
+ * All we need to do is connecting the store and the elements using this function.
+ * ```javascript
+ * connectElements({store, elements})
+ * ```
+ *
+ * Now, if we dispatch the `INCREMENT` action, the state is going to change and the [data-counter]
+ * element is going to re-render since they are connected.
+ * ```javascript
+ * store.dispatch({type: 'INCREMENT'})
+ * ```
+ */
 export function connectElements ({ elements, store, action = 'ELEMENTS_LOAD' }) {
   function loadElements () {
     return _.reduce(elements, (pageLoadParams, { load }, selector) => {
@@ -16,6 +105,7 @@ export function connectElements ({ elements, store, action = 'ELEMENTS_LOAD' })
       return _.isObject(morePageLoadParams) ? Object.assign(pageLoadParams, morePageLoadParams) : pageLoadParams
     }, {})
   }
+
   function renderElements (state, oldState) {
     _.forIn(elements, ({ render }, selector) => {
       if (!render) return
@@ -24,11 +114,13 @@ export function connectElements ({ elements, store, action = 'ELEMENTS_LOAD' })
       render($el, state, oldState)
     })
   }
+
   let oldState = store.getState()
   store.subscribe(() => {
     const state = store.getState()
     renderElements(state, oldState)
     oldState = state
   })
+
   store.dispatch(Object.assign(loadElements(), { type: action }))
 }

apps/block_scout_web/config/config.exs

@@ -48,7 +48,9 @@ config :ex_cldr,
 config :logger, :block_scout_web,
   # keep synced with `config/config.exs`
   format: "$dateT$time $metadata[$level] $message\n",
-  metadata: ~w(application fetcher request_id)a,
+  metadata:
+    ~w(application fetcher request_id first_block_number last_block_number missing_block_range_count missing_block_count
+       block_number step count error_count shrunk)a,
   metadata_filter: [application: :block_scout_web]
 
 config :spandex_phoenix, tracer: BlockScoutWeb.Tracer

apps/ethereum_jsonrpc/config/config.exs

@@ -17,7 +17,9 @@ config :ethereum_jsonrpc, EthereumJSONRPC.Tracer,
 config :logger, :ethereum_jsonrpc,
   # keep synced with `config/config.exs`
   format: "$dateT$time $metadata[$level] $message\n",
-  metadata: ~w(application fetcher request_id)a,
+  metadata:
+    ~w(application fetcher request_id first_block_number last_block_number missing_block_range_count missing_block_count
+       block_number step count error_count shrunk)a,
   metadata_filter: [application: :ethereum_jsonrpc]
 
 # Import environment specific config. This must remain at the bottom

apps/explorer/config/config.exs

@@ -50,7 +50,9 @@ config :explorer,
 config :logger, :explorer,
   # keep synced with `config/config.exs`
   format: "$dateT$time $metadata[$level] $message\n",
-  metadata: ~w(application fetcher request_id)a,
+  metadata:
+    ~w(application fetcher request_id first_block_number last_block_number missing_block_range_count missing_block_count
+       block_number step count error_count shrunk)a,
   metadata_filter: [application: :explorer]
 
 config :spandex_ecto, SpandexEcto.EctoLogger,

apps/explorer/lib/explorer/chain/address/current_token_balance.ex

@@ -1,6 +1,9 @@
 defmodule Explorer.Chain.Address.CurrentTokenBalance do
   @moduledoc """
   Represents the current token balance from addresses according to the last block.
+
+  In this table we can see only the last balance from addresses. If you want to see the history of
+  token balances look at the `Address.TokenBalance` instead.
   """
 
   use Ecto.Schema

apps/explorer/lib/explorer/chain/address/token_balance.ex

@@ -1,6 +1,10 @@
 defmodule Explorer.Chain.Address.TokenBalance do
   @moduledoc """
   Represents a token balance from an address.
+
+  In this table we can see all token balances that a specific addreses had acording to the block
+  numbers. If you want to show only the last balance from an address, consider querying against
+  `Address.CurrentTokenBalance` instead.
   """
 
   use Ecto.Schema

apps/indexer/config/config.exs

@@ -19,7 +19,9 @@ config :indexer, Indexer.Tracer,
 config :logger, :indexer,
   # keep synced with `config/config.exs`
   format: "$dateT$time $metadata[$level] $message\n",
-  metadata: ~w(application fetcher request_id)a,
+  metadata:
+    ~w(application fetcher request_id first_block_number last_block_number missing_block_range_count missing_block_count
+       block_number step count error_count shrunk)a,
   metadata_filter: [application: :indexer]
 
 # Import environment specific config. This must remain at the bottom

apps/indexer/lib/indexer/block/catchup/bound_interval_supervisor.ex

@@ -184,7 +184,8 @@ defmodule Indexer.Block.Catchup.BoundIntervalSupervisor do
   end
 
   def handle_info(
-        {ref, %{first_block_number: first_block_number, missing_block_count: missing_block_count, shrunk: false}},
+        {ref,
+         %{first_block_number: first_block_number, missing_block_count: missing_block_count, shrunk: false = shrunk}},
         %__MODULE__{
           bound_interval: bound_interval,
           task: %Task{ref: ref}
@@ -194,20 +195,23 @@ defmodule Indexer.Block.Catchup.BoundIntervalSupervisor do
     new_bound_interval =
       case missing_block_count do
         0 ->
-          Logger.info(fn -> ["Index already caught up in ", to_string(first_block_number), "-0."] end)
+          Logger.info("Index already caught up.",
+            first_block_number: first_block_number,
+            last_block_number: 0,
+            missing_block_count: 0,
+            shrunk: shrunk
+          )
 
           BoundInterval.increase(bound_interval)
 
         _ ->
-          Logger.info(fn ->
-            [
-              "Index had to catch up ",
-              to_string(missing_block_count),
-              " blocks in ",
-              to_string(first_block_number),
-              "-0."
-            ]
-          end)
+          Logger.info(
+            "Index had to catch up.",
+            first_block_number: first_block_number,
+            last_block_number: 0,
+            missing_block_count: missing_block_count,
+            shrunk: shrunk
+          )
 
           BoundInterval.decrease(bound_interval)
       end
@@ -226,7 +230,8 @@ defmodule Indexer.Block.Catchup.BoundIntervalSupervisor do
   end
 
   def handle_info(
-        {ref, %{first_block_number: first_block_number, missing_block_count: missing_block_count, shrunk: true}},
+        {ref,
+         %{first_block_number: first_block_number, missing_block_count: missing_block_count, shrunk: true = shrunk}},
         %__MODULE__{
           task: %Task{ref: ref}
         } = state
@@ -234,15 +239,13 @@ defmodule Indexer.Block.Catchup.BoundIntervalSupervisor do
       when is_integer(missing_block_count) do
     Process.demonitor(ref, [:flush])
 
-    Logger.info(fn ->
-      [
-        "Index had to catch up ",
-        to_string(missing_block_count),
-        " blocks in ",
-        to_string(first_block_number),
-        "-0, but the sequence was shrunk to save memory, so retrying immediately."
-      ]
-    end)
+    Logger.info(
+      "Index had to catch up, but the sequence was shrunk to save memory, so retrying immediately.",
+      first_block_number: first_block_number,
+      last_block_number: 0,
+      missing_block_count: missing_block_count,
+      shrunk: shrunk
+    )
 
     send(self(), :catchup_index)
 

apps/indexer/lib/indexer/block/catchup/fetcher.ex

@@ -71,6 +71,9 @@ defmodule Indexer.Block.Catchup.Fetcher do
         # realtime indexer gets the current latest block
         first = latest_block_number - 1
         last = 0
+
+        Logger.metadata(first_block_number: first, last_block_number: last)
+
         missing_ranges = Chain.missing_block_number_ranges(first..last)
         range_count = Enum.count(missing_ranges)
 
@@ -79,9 +82,10 @@ defmodule Indexer.Block.Catchup.Fetcher do
           |> Stream.map(&Enum.count/1)
           |> Enum.sum()
 
-        Logger.debug(fn ->
-          "#{missing_block_count} missed blocks in #{range_count} ranges between #{first} and #{last}"
-        end)
+        Logger.debug(fn -> "Missed blocks in ranges." end,
+          missing_block_range_count: range_count,
+          missing_block_count: missing_block_count
+        )
 
         shrunk =
           case missing_block_count do
@@ -171,23 +175,25 @@ defmodule Indexer.Block.Catchup.Fetcher do
             )
   defp fetch_and_import_range_from_sequence(
          %__MODULE__{block_fetcher: %Block.Fetcher{} = block_fetcher},
-         _.._ = range,
+         first..last = range,
          sequence
        ) do
-    Logger.metadata(fetcher: :block_catchup)
+    Logger.metadata(fetcher: :block_catchup, first_block_number: first, last_block_number: last)
 
     case fetch_and_import_range(block_fetcher, range) do
       {:ok, %{inserted: inserted, errors: errors}} ->
-        errors = cap_seq(sequence, errors, range)
+        errors = cap_seq(sequence, errors)
         retry(sequence, errors)
 
         {:ok, inserted: inserted}
 
       {:error, {step, reason}} = error ->
-        Logger.error(fn ->
-          first..last = range
-          "failed to fetch #{step} for blocks #{first} - #{last}: #{inspect(reason)}. Retrying block range."
-        end)
+        Logger.error(
+          fn ->
+            ["failed to fetch: ", inspect(reason), ". Retrying."]
+          end,
+          step: step
+        )
 
         push_back(sequence, range)
 
@@ -195,7 +201,7 @@ defmodule Indexer.Block.Catchup.Fetcher do
 
       {:error, changesets} = error when is_list(changesets) ->
         Logger.error(fn ->
-          "failed to validate blocks #{inspect(range)}: #{inspect(changesets)}. Retrying"
+          ["failed to validate: ", inspect(changesets), ". Retrying."]
         end)
 
         push_back(sequence, range)
@@ -203,9 +209,12 @@ defmodule Indexer.Block.Catchup.Fetcher do
         error
 
       {:error, {step, failed_value, _changes_so_far}} = error ->
-        Logger.error(fn ->
-          "failed to insert blocks during #{step} #{inspect(range)}: #{inspect(failed_value)}. Retrying"
-        end)
+        Logger.error(
+          fn ->
+            ["failed to insert: ", inspect(failed_value), ". Retrying."]
+          end,
+          step: step
+        )
 
         push_back(sequence, range)
 
@@ -213,7 +222,7 @@ defmodule Indexer.Block.Catchup.Fetcher do
     end
   end
 
-  defp cap_seq(seq, errors, range) do
+  defp cap_seq(seq, errors) do
     {not_founds, other_errors} =
       Enum.split_with(errors, fn
         %{code: 404, data: %{number: _}} -> true
@@ -222,10 +231,7 @@ defmodule Indexer.Block.Catchup.Fetcher do
 
     case not_founds do
       [] ->
-        Logger.debug(fn ->
-          first_block_number..last_block_number = range
-          "got blocks #{first_block_number} - #{last_block_number}"
-        end)
+        Logger.debug("got blocks")
 
         other_errors
 
@@ -239,7 +245,7 @@ defmodule Indexer.Block.Catchup.Fetcher do
   defp push_back(sequence, range) do
     case Sequence.push_back(sequence, range) do
       :ok -> :ok
-      {:error, reason} -> Logger.error(fn -> ["Could not push block range to back to Sequence: ", inspect(reason)] end)
+      {:error, reason} -> Logger.error(fn -> ["Could not push back to Sequence: ", inspect(reason)] end)
     end
   end
 

apps/indexer/lib/indexer/block/fetcher/receipts.ex

@@ -13,7 +13,7 @@ defmodule Indexer.Block.Fetcher.Receipts do
         %Block.Fetcher{json_rpc_named_arguments: json_rpc_named_arguments} = state,
         transaction_params
       ) do
-    Logger.debug(fn -> "fetching #{length(transaction_params)} transaction receipts" end)
+    Logger.debug("fetching transaction receipts", count: Enum.count(transaction_params))
     stream_opts = [max_concurrency: state.receipts_concurrency, timeout: :infinity]
 
     transaction_params

apps/indexer/lib/indexer/block/realtime/fetcher.ex

@@ -159,8 +159,8 @@ defmodule Indexer.Block.Realtime.Fetcher do
 
   @decorate trace(name: "fetch", resource: "Indexer.Block.Realtime.Fetcher.fetch_and_import_block/3", tracer: Tracer)
   def fetch_and_import_block(block_number_to_fetch, block_fetcher, reorg?, retry \\ 3) do
-    Logger.metadata(fetcher: :block_realtime)
-
+    Indexer.Logger.metadata(
+      fn ->
         if reorg? do
           # give previous fetch attempt (for same block number) a chance to finish
           # before fetching again, to reduce block consensus mistakes
@@ -168,6 +168,10 @@ defmodule Indexer.Block.Realtime.Fetcher do
         end
 
         do_fetch_and_import_block(block_number_to_fetch, block_fetcher, retry)
+      end,
+      fetcher: :block_realtime,
+      block_number: block_number_to_fetch
+    )
   end
 
   @decorate span(tracer: Tracer)
@@ -179,33 +183,28 @@ defmodule Indexer.Block.Realtime.Fetcher do
           Task.Supervisor.start_child(TaskSupervisor, ConsensusEnsurer, :perform, args)
         end
 
-        Logger.debug(fn ->
-          ["fetched and imported block ", to_string(block_number_to_fetch)]
-        end)
+        Logger.debug("Fetched and imported.")
 
       {:ok, %{inserted: _, errors: [_ | _] = errors}} ->
         Logger.error(fn ->
           [
-            "failed to fetch block ",
-            to_string(block_number_to_fetch),
-            ": ",
+            "failed to fetch block: ",
             inspect(errors),
             ".  Block will be retried by catchup indexer."
           ]
         end)
 
       {:error, {step, reason}} ->
-        Logger.error(fn ->
+        Logger.error(
+          fn ->
             [
-            "failed to fetch ",
-            to_string(step),
-            " for block ",
-            to_string(block_number_to_fetch),
-            ": ",
+              "failed to fetch: ",
               inspect(reason),
               ".  Block will be retried by catchup indexer."
             ]
-        end)
+          end,
+          step: step
+        )
 
       {:error, [%Changeset{} | _] = changesets} ->
         params = %{
@@ -228,17 +227,16 @@ defmodule Indexer.Block.Realtime.Fetcher do
         end
 
       {:error, {step, failed_value, _changes_so_far}} ->
-        Logger.error(fn ->
+        Logger.error(
+          fn ->
             [
-            "failed to insert ",
-            to_string(step),
-            " for block ",
-            to_string(block_number_to_fetch),
-            ": ",
+              "failed to insert: ",
               inspect(failed_value),
               ".  Block will be retried by catchup indexer."
             ]
-        end)
+          end,
+          step: step
+        )
     end
   end
 

apps/indexer/lib/indexer/block/uncle/fetcher.ex

@@ -74,16 +74,22 @@ defmodule Indexer.Block.Uncle.Fetcher do
     # the same block could be included as an uncle on multiple blocks, but we only want to fetch it once
     unique_hashes = Enum.uniq(hashes)
 
-    Logger.debug(fn -> "fetching #{length(unique_hashes)}" end)
+    unique_hash_count = Enum.count(unique_hashes)
+    Logger.metadata(count: unique_hash_count)
+
+    Logger.debug("fetching")
 
     case EthereumJSONRPC.fetch_blocks_by_hash(unique_hashes, json_rpc_named_arguments) do
       {:ok, blocks} ->
         run_blocks(blocks, block_fetcher, unique_hashes)
 
       {:error, reason} ->
-        Logger.error(fn ->
-          ["failed to fetch ", unique_hashes |> length |> to_string(), ": ", inspect(reason)]
-        end)
+        Logger.error(
+          fn ->
+            ["failed to fetch: ", inspect(reason)]
+          end,
+          error_count: unique_hash_count
+        )
 
         {:retry, unique_hashes}
     end
@@ -110,19 +116,13 @@ defmodule Indexer.Block.Uncle.Fetcher do
            transactions: %{params: transactions_params, on_conflict: :nothing}
          }) do
       {:ok, _} ->
-        retry(errors, original_entries)
+        retry(errors)
 
       {:error, step, failed_value, _changes_so_far} ->
-        Logger.error(fn ->
-          [
-            "failed to import ",
-            original_entries |> length() |> to_string(),
-            " in step ",
-            inspect(step),
-            ": ",
-            inspect(failed_value)
-          ]
-        end)
+        Logger.error(fn -> ["failed to import: ", inspect(failed_value)] end,
+          step: step,
+          error_count: Enum.count(original_entries)
+        )
 
         {:retry, original_entries}
     end
@@ -185,21 +185,20 @@ defmodule Indexer.Block.Uncle.Fetcher do
     end)
   end
 
-  defp retry([], _), do: :ok
+  defp retry([]), do: :ok
 
-  defp retry(errors, original_entries) when is_list(errors) do
+  defp retry(errors) when is_list(errors) do
     retried_entries = errors_to_entries(errors)
 
-    Logger.error(fn ->
+    Logger.error(
+      fn ->
         [
-        "failed to fetch ",
-        retried_entries |> length() |> to_string(),
-        "/",
-        original_entries |> length() |> to_string(),
-        ": ",
+          "failed to fetch: ",
           errors_to_iodata(errors)
         ]
-    end)
+      end,
+      error_count: Enum.count(retried_entries)
+    )
   end
 
   defp errors_to_entries(errors) when is_list(errors) do

apps/indexer/lib/indexer/coin_balance/fetcher.ex

@@ -74,7 +74,10 @@ defmodule Indexer.CoinBalance.Fetcher do
     # `{address, block}`, so take unique params only
     unique_entries = Enum.uniq(entries)
 
-    Logger.debug(fn -> ["fetching ", unique_entries |> length() |> to_string()] end)
+    unique_entry_count = Enum.count(unique_entries)
+    Logger.metadata(count: unique_entry_count)
+
+    Logger.debug(fn -> "fetching" end)
 
     unique_entries
     |> Enum.map(&entry_to_params/1)
@@ -84,9 +87,12 @@ defmodule Indexer.CoinBalance.Fetcher do
         run_fetched_balances(fetched_balances, unique_entries)
 
       {:error, reason} ->
-        Logger.error(fn ->
-          ["failed to fetch ", unique_entries |> length() |> to_string(), ": ", inspect(reason)]
-        end)
+        Logger.error(
+          fn ->
+            ["failed to fetch: ", inspect(reason)]
+          end,
+          error_count: unique_entry_count
+        )
 
         {:retry, unique_entries}
     end
@@ -115,7 +121,7 @@ defmodule Indexer.CoinBalance.Fetcher do
 
   defp run_fetched_balances(%FetchedBalances{params_list: []}, original_entries), do: {:retry, original_entries}
 
-  defp run_fetched_balances(%FetchedBalances{params_list: params_list, errors: errors}, original_entries) do
+  defp run_fetched_balances(%FetchedBalances{params_list: params_list, errors: errors}, _) do
     value_fetched_at = DateTime.utc_now()
 
     importable_balances_params = Enum.map(params_list, &Map.put(&1, :value_fetched_at, value_fetched_at))
@@ -128,24 +134,23 @@ defmodule Indexer.CoinBalance.Fetcher do
         address_coin_balances: %{params: importable_balances_params}
       })
 
-    retry(errors, original_entries)
+    retry(errors)
   end
 
-  defp retry([], _), do: :ok
+  defp retry([]), do: :ok
 
-  defp retry(errors, original_entries) when is_list(errors) do
+  defp retry(errors) when is_list(errors) do
     retried_entries = fetched_balances_errors_to_entries(errors)
 
-    Logger.error(fn ->
+    Logger.error(
+      fn ->
         [
-        "failed to fetch ",
-        retried_entries |> length() |> to_string(),
-        "/",
-        original_entries |> length() |> to_string(),
-        ": ",
+          "failed to fetch: ",
           fetched_balance_errors_to_iodata(errors)
         ]
-    end)
+      end,
+      error_count: Enum.count(retried_entries)
+    )
 
     {:retry, retried_entries}
   end

apps/indexer/lib/indexer/internal_transaction/fetcher.ex

@@ -103,7 +103,10 @@ defmodule Indexer.InternalTransaction.Fetcher do
   def run(entries, json_rpc_named_arguments) do
     unique_entries = unique_entries(entries)
 
-    Logger.debug(fn -> "fetching internal transactions for #{length(unique_entries)} transactions" end)
+    unique_entries_count = Enum.count(unique_entries)
+    Logger.metadata(count: unique_entries_count)
+
+    Logger.debug("fetching internal transactions for transactions")
 
     unique_entries
     |> Enum.map(&params/1)
@@ -128,25 +131,25 @@ defmodule Indexer.InternalTransaction.Fetcher do
           })
         else
           {:error, step, reason, _changes_so_far} ->
-            Logger.error(fn ->
+            Logger.error(
+              fn ->
                 [
-                "failed to import internal transactions for ",
-                to_string(length(entries)),
-                " transactions at ",
-                to_string(step),
-                ": ",
+                  "failed to import internal transactions for transactions: ",
                   inspect(reason)
                 ]
-            end)
+              end,
+              step: step,
+              error_count: unique_entries_count
+            )
 
             # re-queue the de-duped entries
             {:retry, unique_entries}
         end
 
       {:error, reason} ->
-        Logger.error(fn ->
-          "failed to fetch internal transactions for #{length(entries)} transactions: #{inspect(reason)}"
-        end)
+        Logger.error(fn -> ["failed to fetch internal transactions for transactions: ", inspect(reason)] end,
+          error_count: unique_entries_count
+        )
 
         # re-queue the de-duped entries
         {:retry, unique_entries}

apps/indexer/lib/indexer/logger.ex

@@ -1,8 +1,22 @@
 defmodule Indexer.Logger do
   @moduledoc """
-  Helpers for formatting `Logger` data as `t:iodata/0`.
+  Helpers for `Logger`.
   """
 
+  @doc """
+  Sets `keyword` in `Logger.metadata/1` around `fun`.
+  """
+  def metadata(fun, keyword) when is_function(fun, 0) and is_list(keyword) do
+    metadata_before = Logger.metadata()
+
+    try do
+      Logger.metadata(keyword)
+      fun.()
+    after
+      Logger.reset_metadata(metadata_before)
+    end
+  end
+
   @doc """
   The PID and its registered name (if it has one) as `t:iodata/0`.
   """

apps/indexer/lib/indexer/token_balance/fetcher.ex

@@ -93,10 +93,11 @@ defmodule Indexer.TokenBalance.Fetcher do
   end
 
   def fetch_from_blockchain(params_list) do
-    {:ok, token_balances} =
-      params_list
-      |> Enum.filter(&(&1.retries_count <= @max_retries))
-      |> TokenBalances.fetch_token_balances_from_blockchain()
+    retryable_params_list = Enum.filter(params_list, &(&1.retries_count <= @max_retries))
+
+    Logger.metadata(count: Enum.count(retryable_params_list))
+
+    {:ok, token_balances} = TokenBalances.fetch_token_balances_from_blockchain(retryable_params_list)
 
     token_balances
   end
@@ -116,7 +117,9 @@ defmodule Indexer.TokenBalance.Fetcher do
         :ok
 
       {:error, reason} ->
-        Logger.debug(fn -> "failed to import #{length(token_balances_params)} token balances, #{inspect(reason)}" end)
+        Logger.debug(fn -> ["failed to import token balances: ", inspect(reason)] end,
+          error_count: Enum.count(token_balances_params)
+        )
 
         :error
     end

apps/indexer/lib/indexer/token_balances.ex

@@ -34,7 +34,7 @@ defmodule Indexer.TokenBalances do
 
   @decorate span(tracer: Tracer)
   def fetch_token_balances_from_blockchain(token_balances, opts \\ []) do
-    Logger.debug(fn -> "fetching #{Enum.count(token_balances)} token balances" end)
+    Logger.debug("fetching token balances", count: Enum.count(token_balances))
 
     task_timeout = Keyword.get(opts, :timeout, @task_timeout)
 

config/config.exs

@@ -32,19 +32,25 @@ config :logger,
 config :logger, :console,
   # Use same format for all loggers, even though the level should only ever be `:error` for `:error` backend
   format: "$dateT$time $metadata[$level] $message\n",
-  metadata: ~w(application fetcher request_id)a
+  metadata:
+    ~w(application fetcher request_id first_block_number last_block_number missing_block_range_count missing_block_count
+       block_number step count error_count shrunk)a
 
 config :logger, :ecto,
   # Use same format for all loggers, even though the level should only ever be `:error` for `:error` backend
   format: "$dateT$time $metadata[$level] $message\n",
-  metadata: ~w(application fetcher request_id)a,
+  metadata:
+    ~w(application fetcher request_id first_block_number last_block_number missing_block_range_count missing_block_count
+       block_number step count error_count shrunk)a,
   metadata_filter: [application: :ecto]
 
 config :logger, :error,
   # Use same format for all loggers, even though the level should only ever be `:error` for `:error` backend
   format: "$dateT$time $metadata[$level] $message\n",
   level: :error,
-  metadata: ~w(application fetcher request_id)a
+  metadata:
+    ~w(application fetcher request_id first_block_number last_block_number missing_block_range_count missing_block_count
+       block_number step count error_count shrunk)a
 
 # Import environment specific config. This must remain at the bottom
 # of this file so it overrides the configuration defined above.