You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: block.rb
    path of file: ./repos/ruby-ethereum/lib/ethereum
    
    the code of the file until where you have to start completion: # -*- encoding : ascii-8bit -*-

    
      def verify(block, parent)
        block2 = RLP.decode RLP.encode(block), sedes: Block, env: parent.env, parent: parent
        raise "block not match" unless block == block2
        true
      rescue InvalidBlock
        false
      end