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: tpm.rb
    path of file: ./repos/webauthn-ruby/lib/webauthn/attestation_statement
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

require "cose/algorithm"
require "openssl"
require "tpm/key_attestation"
require "webauthn/attestation_statement/base"

module WebAuthn
  module AttestationStatement
    class TPM < Base
      TPM_V2 = "2.0"

      COSE_ALG_TO_TPM = {
        "RS1" => { signature: ::TPM::ALG_RSASSA, hash: ::TPM::ALG_SHA1 },

    
      def valid?(authenticator_data, client_data_hash)
        attestation_type == ATTESTATION_TYPE_ATTCA &&
          ver == TPM_V2 &&
          valid_key_attestation?(
            authenticator_data.data + client_data_hash,
            authenticator_data.credential.public_key_object,
            authenticator_data.aaguid
          ) &&
          matching_aaguid?(authenticator_data.attested_credential_data.raw_aaguid) &&
          trustworthy?(aaguid: authenticator_data.aaguid) &&
          [attestation_type, attestation_trust_path]
      end