Add API v2 output for transaction list of the specified batch

apps/block_scout_web/lib/block_scout_web/api_router.ex

@@ -135,6 +135,7 @@ defmodule BlockScoutWeb.ApiRouter do
     scope "/transactions" do
       get("/", V2.TransactionController, :transactions)
       get("/watchlist", V2.TransactionController, :watchlist_transactions)
+      get("/zkevm-batch/:batch_number", V2.TransactionController, :zkevm_batch)
       get("/:transaction_hash_param", V2.TransactionController, :transaction)
       get("/:transaction_hash_param/token-transfers", V2.TransactionController, :token_transfers)
       get("/:transaction_hash_param/internal-transactions", V2.TransactionController, :internal_transactions)

apps/block_scout_web/lib/block_scout_web/controllers/api/v2/transaction_controller.ex

@@ -111,6 +111,18 @@ defmodule BlockScoutWeb.API.V2.TransactionController do
     |> render(:transactions, %{transactions: transactions, next_page_params: next_page_params})
   end
 
+  def zkevm_batch(conn, %{"batch_number" => batch_number} = _params) do
+    transactions =
+      batch_number
+      |> Chain.zkevm_batch_transactions(api?: true)
+      |> Enum.map(fn tx -> tx.hash end)
+      |> Chain.hashes_to_transactions(api?: true, necessity_by_association: @transaction_necessity_by_association)
+
+    conn
+    |> put_status(200)
+    |> render(:transactions, %{transactions: transactions})
+  end
+
   def raw_trace(conn, %{"transaction_hash_param" => transaction_hash_string} = params) do
     with {:format, {:ok, transaction_hash}} <- {:format, Chain.string_to_transaction_hash(transaction_hash_string)},
          {:not_found, {:ok, transaction}} <-

apps/block_scout_web/lib/block_scout_web/views/api/v2/transaction_view.ex

@@ -430,6 +430,7 @@ defmodule BlockScoutWeb.API.V2.TransactionView do
   defp add_optional_transaction_field(result, transaction, field_name, assoc_name, assoc_field) do
     case Map.get(transaction, assoc_name) do
       nil -> result
+      %Ecto.Association.NotLoaded{} -> result
       item -> Map.put(result, field_name, Map.get(item, assoc_field))
     end
   end

apps/explorer/lib/explorer/chain.ex

@@ -65,6 +65,7 @@ defmodule Explorer.Chain do
     Transaction,
     Wei,
     Withdrawal,
+    ZkevmBatchTxn,
     ZkevmTxnBatch
   }
 
@@ -1752,7 +1753,7 @@ defmodule Explorer.Chain do
     |> where([transaction], transaction.hash in ^hashes)
     |> join_associations(necessity_by_association)
     |> preload([{:token_transfers, [:token, :from_address, :to_address]}])
-    |> Repo.all()
+    |> select_repo(options).all()
   end
 
   @doc """
@@ -6462,6 +6463,12 @@ defmodule Explorer.Chain do
     select_repo(options).all(query)
   end
 
+  def zkevm_batch_transactions(batch_number, options \\ []) do
+    query = from(bts in ZkevmBatchTxn, where: bts.batch_number == ^batch_number)
+
+    select_repo(options).all(query)
+  end
+
   defp page_zkevm_batches(query, %PagingOptions{key: nil}), do: query
 
   defp page_zkevm_batches(query, %PagingOptions{key: {number}}) do

apps/explorer/priv/repo/migrations/20230420110800_create_zkevm_tables.exs

@@ -48,5 +48,7 @@ defmodule Explorer.Repo.Migrations.CreateZkevmTables do
       add(:hash, :bytea, null: false, primary_key: true)
       timestamps(null: false, type: :utc_datetime_usec)
     end
+
+    create(index(:zkevm_batch_l2_transactions, :batch_number))
   end
 end