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Lightweight Ethereum and Solana RPC client for Elixir

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signet test support signet sleuth_handler.ex
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test/support/signet/sleuth_handler.ex 

defmodule Signet.Test.SleuthHandler do

  @moduledoc ~S"""

  Module to handle sending back sleuth responses to our unit tests.



  Note: this could clearly be abstracted to be a little nicer, but it's

        perfectly adequate the way it is now, I reckon.

  """

  use Signet.Hex



  @block_number_query Signet.Contract.BlockNumber.bytecode()



  defp handle_call(@block_number_query, calldata) do

    case Signet.Contract.BlockNumber.decode_call(calldata) do

      {:ok, "query", _} ->

        encode_sleuth(Signet.Contract.BlockNumber.query_selector(), {2})



      {:ok, "queryTwo", _} ->

        encode_sleuth(Signet.Contract.BlockNumber.query_two_selector(), {2, 3})



      {:ok, "queryThree", _} ->

        encode_sleuth(Signet.Contract.BlockNumber.query_three_selector(), {2})



      {:ok, "queryFour", _} ->

        encode_sleuth(

          Signet.Contract.BlockNumber.query_four_selector(),

          {~h[0x010203], ~h[0x0000000000000000000000000000000000000001]}

        )



      {:ok, "queryCool", _} ->

        encode_sleuth(

          Signet.Contract.BlockNumber.query_cool_selector(),

          {{"hi", [1, 2, 3], {"meow"}}}

        )



      _ ->

        raise "Unknown Sleuth query call"

    end

  end



  defp handle_call(query, _calldata) do

    raise "Unknown sleuth query: #{to_hex(query)}"

  end



  def eth_call(%{"data" => data_hex}, _block) do

    data = from_hex!(data_hex)



    cond do

      String.contains?(data, ~h[0xDEADBEEFDEADBEEFDEADBEEFDEADBEEF00000000]) ->

        "0x"



      String.contains?(data, ~h[0xDEADBEEFDEADBEEFDEADBEEFDEADBEEF00000001]) ->

        {:error,

         %{

           "code" => 3,

           "message" => "execution reverted"

         }}



      true ->

        [query, calldata] = Signet.Contract.Sleuth.decode_query_call(data)



        Base.encode16(handle_call(query, calldata))

    end

  end



  defp encode_sleuth(query_selector, values) do

    return_selector = %ABI.FunctionSelector{

      types: [%{type: {:tuple, query_selector.returns}}]

    }



    query_resp = ABI.TypeEncoder.encode([values], return_selector)

    ABI.encode("(bytes)", [{query_resp}])

  end

end