Fix nil abi issue in get_naive_implementation_abi and get_master_copy_pattern methods (#10239)

apps/explorer/lib/explorer/chain/smart_contract/proxy.ex

@@ -385,6 +385,8 @@ defmodule Explorer.Chain.SmartContract.Proxy do
     end
   end
 
+  defp get_naive_implementation_abi(nil, _getter_name), do: nil
+
   defp get_naive_implementation_abi(abi, getter_name) do
     abi
     |> Enum.find(fn method ->
@@ -392,6 +394,8 @@ defmodule Explorer.Chain.SmartContract.Proxy do
     end)
   end
 
+  defp get_master_copy_pattern(nil), do: nil
+
   defp get_master_copy_pattern(abi) do
     abi
     |> Enum.find(fn method ->