quicksign method

@override QuicksignResult quicksign({ required QuicksignRequest request, required List<KadenaSignKeyPair> keyPairs, })

Takes the QuicksignRequest object and signs each cmd in the request. See https://github.com/kadena-io/KIPs/blob/jam/quicksign/kip-0015.md for the Quicksign spec. This accepts multiple key pairs because the signing wallet might contain multiple keys.

Implementation

@override
QuicksignResult quicksign({
  required QuicksignRequest request,
  required List<KadenaSignKeyPair> keyPairs,
}) {
  List<QuicksignResponse> responses = [];

  // Loop through the list of commands
  for (CommandSigData command in request.commandSigDatas) {
    bool signed = false;
    Uint8List hash = CryptoLib.blakeHashToBinary(command.cmd);

    // Loop through the requests signatures
    for (QuicksignSigner sig in command.sigs) {
      // Loop through the key pairs
      for (KadenaSignKeyPair keyPair in keyPairs) {
        // If the public key matches the key pair public key
        if (sig.pubKey == keyPair.publicKey) {
          try {
            // Sign the hash
            final String signature = CryptoLib.signHashBytes(
              hash: hash,
              privateKey: keyPair.privateKey,
            );

            // Add the signature to the sig object
            sig.sig = signature;
          } catch (e) {
            // If there was an error
            final response = QuicksignResponse(
              commandSigData: command,
              outcome: QuicksignOutcome(
                result: QuicksignOutcome.failure,
                msg: '${Constants.quicksignSignFailure}${keyPair.publicKey}',
              ),
            );
            responses.add(response);
          }

          // We have "signed" it even if there is an error
          signed = true;
        }
      }
    }

    if (signed) {
      // Create the outcome object
      final outcome = QuicksignOutcome(
        result: QuicksignOutcome.success,
        hash: CryptoLib.base64UrlBinHash(hash),
      );

      // Create the response object and append it to the responses
      final response = QuicksignResponse(
        commandSigData: command,
        outcome: outcome,
      );
      responses.add(response);
    } else {
      // If the keypair was not found, no sig!
      final response = QuicksignResponse(
        commandSigData: command,
        outcome: QuicksignOutcome(
          result: QuicksignOutcome.noSig,
        ),
      );
      responses.add(response);
    }
  }

  return QuicksignResult(
    responses: responses,
  );
}