quiche/blind_sign_auth/proto/spend_token_data.proto

syntax = "proto3";

package privacy.ppn;

import "quiche/blind_sign_auth/proto/public_metadata.proto";
import "quiche/blind_sign_auth/anonymous_tokens/proto/anonymous_tokens.proto";

option cc_api_version = 2;

message SpendTokenData {
  // Public metadata associated with the token being spent.
  // See go/ppn-token-spend and go/ppn-phosphor-at-service for details.
  PublicMetadataInfo public_metadata = 1;
  // The unblinded token to be spent which was blind-signed by Phosphor.
  bytes unblinded_token = 2;
  // The signature for the token to be spent, obtained from Phosphor and
  // unblinded.
  bytes unblinded_token_signature = 3;
  // The version number of the signing key that was used during blind-signing.
  int64 signing_key_version = 4;
  // A use case identifying the caller. Should be a fixed, hardcoded value to
  // prevent cross-spending tokens.
  private_membership.anonymous_tokens.AnonymousTokensUseCase use_case = 5;
  // Nonce used to mask plaintext message before cryptographic verification.
  bytes message_mask = 6;
}