From 0a362ee98182d93eee91157d187bd2deddc755de Mon Sep 17 00:00:00 2001
From: Donald Hutchison <donald.hutchison@clabs.co>
Date: Tue, 6 Feb 2024 17:45:52 +0100
Subject: [PATCH] Queue unknown gas currency for token indexing.

---
 .../lib/block_scout_web/views/transaction_view.ex     | 11 +++++++++--
 apps/explorer/lib/explorer/chain/token.ex             |  8 ++++++++
 2 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/apps/block_scout_web/lib/block_scout_web/views/transaction_view.ex b/apps/block_scout_web/lib/block_scout_web/views/transaction_view.ex
index 24d9d387a10c..955f7e097420 100644
--- a/apps/block_scout_web/lib/block_scout_web/views/transaction_view.ex
+++ b/apps/block_scout_web/lib/block_scout_web/views/transaction_view.ex
@@ -1,6 +1,8 @@
 defmodule BlockScoutWeb.TransactionView do
   use BlockScoutWeb, :view
 
+  require Logger
+
   alias BlockScoutWeb.{AccessHelpers, AddressView, BlockView, TabHelpers}
   alias BlockScoutWeb.Account.AuthController
   alias BlockScoutWeb.Cldr.Number
@@ -8,6 +10,7 @@ defmodule BlockScoutWeb.TransactionView do
   alias Explorer.{Chain, CustomContractsHelpers, Repo}
   alias Explorer.Chain.Block.Reward
   alias Explorer.Chain.{Address, Block, InternalTransaction, Transaction, Wei}
+  alias Explorer.Chain.Token, as: ChainToken
   alias Explorer.Counters.AverageBlockTime
   alias Explorer.ExchangeRates.Token
   alias Timex.Duration
@@ -498,12 +501,16 @@ defmodule BlockScoutWeb.TransactionView do
      format_wei_value(Wei.from(fee, :wei), denomination, include_unit_label: include_label?, currency: currency)}
   end
 
-  def get_fee_token_name(transaction) do
+  def get_fee_token_name(transaction = %{gas_currency_hash: gch}) do
     token = Transaction.get_fee_token_name(transaction)
 
     case token do
       {:ok, address} -> address
-      {:error, :not_found} -> %{name: "", symbol: "#{gettext("CELO")}"}
+      {:error, :not_found} ->
+        Logger.info("Found unknown gas token at #{inspect(gch)}")
+        ChainToken.set_uncatalogued_token(transaction)
+
+        %{name: "", symbol: "#{gettext("CELO")}"}
     end
   end
 
diff --git a/apps/explorer/lib/explorer/chain/token.ex b/apps/explorer/lib/explorer/chain/token.ex
index 87f538199d1f..dbcbbbf557a8 100644
--- a/apps/explorer/lib/explorer/chain/token.ex
+++ b/apps/explorer/lib/explorer/chain/token.ex
@@ -24,6 +24,7 @@ defmodule Explorer.Chain.Token do
 
   alias Ecto.Changeset
   alias Explorer.Chain.{Address, Hash, Token}
+  alias Explorer.Repo
   alias Explorer.SmartContract.Helper
 
   @typedoc """
@@ -140,4 +141,11 @@ defmodule Explorer.Chain.Token do
       where: token.cataloged == true and token.updated_at <= ^some_time_ago_date
     )
   end
+
+  def set_uncatalogued_token(%{gas_currency_hash: nil}), do: :ok
+  def set_uncatalogued_token(%{gas_currency_hash: address}) do
+    %Token{}
+    |> changeset(%{contract_address_hash: address, type: "ERC-20"})
+    |> Repo.insert()
+  end
 end