Insert missing addresses in token instance fetcher

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

@@ -9,7 +9,7 @@ defmodule Indexer.Fetcher.TokenInstance do
   require Logger
 
   alias Explorer.{Chain, Repo}
-  alias Explorer.Chain.{Cache.BlockNumber, Token}
+  alias Explorer.Chain.{Address, Cache.BlockNumber, Token}
   alias Explorer.Token.{InstanceMetadataRetriever, InstanceOwnerReader}
   alias Indexer.BufferedTask
 
@@ -100,17 +100,12 @@ defmodule Indexer.Fetcher.TokenInstance do
   end
 
   defp update_current_token_balances(token_contract_address_hash, token_ids) do
-    import_params =
     token_ids
     |> Enum.map(&instance_owner_request(token_contract_address_hash, &1))
     |> InstanceOwnerReader.get_owner_of()
     |> Enum.map(&current_token_balances_import_params/1)
-
-    Chain.import(%{
-      address_current_token_balances: %{
-        params: import_params
-      }
-    })
+    |> all_import_params()
+    |> Chain.import()
   end
 
   defp instance_owner_request(token_contract_address_hash, token_id) do
@@ -132,6 +127,29 @@ defmodule Indexer.Fetcher.TokenInstance do
     }
   end
 
+  defp all_import_params(balances_import_params) do
+    addresses_import_params =
+      balances_import_params
+      |> Enum.reduce([], fn %{address_hash: address_hash}, acc ->
+        case Repo.get_by(Address, hash: address_hash) do
+          nil -> [%{hash: address_hash} | acc]
+          _address -> acc
+        end
+      end)
+      |> case do
+        [] -> %{}
+        params -> %{addresses: %{params: params}}
+      end
+
+    current_token_balances_import_params = %{
+      address_current_token_balances: %{
+        params: balances_import_params
+      }
+    }
+
+    Map.merge(current_token_balances_import_params, addresses_import_params)
+  end
+
   @doc """
   Fetches token instance data asynchronously.
   """

apps/indexer/test/indexer/fetcher/token_instance_test.exs

@@ -4,6 +4,8 @@ defmodule Indexer.Fetcher.TokenInstanceTest do
 
   import Mox
 
+  alias Explorer.Chain
+  alias Explorer.Chain.Address
   alias Explorer.Chain.Address.CurrentTokenBalance
   alias Explorer.Repo
   alias Indexer.Fetcher.TokenInstance
@@ -44,5 +46,42 @@ defmodule Indexer.Fetcher.TokenInstanceTest do
                address_hash: ^address_hash
              } = Repo.one(CurrentTokenBalance)
     end
+
+    test "updates current token balance with missing address" do
+      token = insert(:token, type: "ERC-1155")
+      token_contract_address_hash = token.contract_address_hash
+      instance = insert(:token_instance, token_contract_address_hash: token_contract_address_hash)
+      token_id = instance.token_id
+      {:ok, address_hash} = Chain.string_to_address_hash("0x57e93bb58268de818b42e3795c97bad58afcd3fe")
+
+      EthereumJSONRPC.Mox
+      |> expect(:json_rpc, fn [%{id: 0, method: "eth_call", params: [%{data: "0xc87b56dd" <> _}, _]}], _ ->
+        {:ok,
+         [
+           %{
+             id: 0,
+             result:
+               "0x000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000027b7d000000000000000000000000000000000000000000000000000000000000"
+           }
+         ]}
+      end)
+      |> expect(:json_rpc, fn [%{id: 0, method: "eth_call", params: [%{data: "0x6352211e" <> _}, _]}], _ ->
+        {:ok, [%{id: 0, result: "0x00000000000000000000000057e93bb58268de818b42e3795c97bad58afcd3fe"}]}
+      end)
+
+      TokenInstance.run(
+        [%{contract_address_hash: token_contract_address_hash, token_id: token_id, token_ids: nil}],
+        nil
+      )
+
+      assert %{
+               token_id: ^token_id,
+               token_type: "ERC-1155",
+               token_contract_address_hash: ^token_contract_address_hash,
+               address_hash: ^address_hash
+             } = Repo.one(CurrentTokenBalance)
+
+      assert %Address{} = Repo.get_by(Address, hash: address_hash)
+    end
   end
 end