handle correctly empty transactions

apps/ethereum_jsonrpc/lib/ethereum_jsonrpc/block.ex

@@ -319,6 +319,8 @@ defmodule EthereumJSONRPC.Block do
   @spec elixir_to_transactions(elixir) :: Transactions.elixir()
   def elixir_to_transactions(%{"transactions" => transactions}), do: transactions
 
+  def elixir_to_transactions(_), do: []
+
   @doc """
   Get `t:EthereumJSONRPC.Uncles.elixir/0` from `t:elixir/0`.
 

apps/ethereum_jsonrpc/test/ethereum_jsonrpc/block_test.exs

@@ -56,4 +56,10 @@ defmodule EthereumJSONRPC.BlockTest do
              }
     end
   end
+
+  describe "elixir_to_transactions/1" do
+    test "converts to empty list if there is not transaction key" do
+      assert Block.elixir_to_transactions(%{}) == []
+    end
+  end
 end