sign method

@override SignResult sign({ required SignRequest request, required KadenaSignKeyPair keyPair, })

Takes the SigningRequest object, constructs a Pact Payload with it and signs it with the keyPair.

Implementation

@override
SignResult sign({
  required SignRequest request,
  required KadenaSignKeyPair keyPair,
}) {
  try {
    final PactCommandPayload payload = PactCommandPayload(
      networkId: request.networkId,
      payload: CommandPayload(
        exec: ExecMessage(
          data: request.data,
          code: request.code,
        ),
      ),
      signers: [
        SignerCapabilities(
          pubKey: request.signingPubKey,
          clist: request.caps.map((e) => e.cap).toList(),
        ),
      ],
      meta: CommandMetadata(
        chainId: request.chainId,
        gasLimit: request.gasLimit,
        gasPrice: request.gasPrice,
        sender: request.sender,
        ttl: request.ttl,
        creationTime: DateTime.now().millisecondsSinceEpoch - 1000,
      ),
      nonce: DateTime.now().toIso8601String(),
    );

    final String cmd = jsonEncode(payload.toJson());

    final hashAndSign = CryptoLib.hashAndSign(
      message: cmd,
      privateKey: keyPair.privateKey,
    );

    return SignResult(
      pactCommand: PactCommand(
        cmd: cmd,
        hash: hashAndSign.hash,
        sigs: [
          Signer(
            sig: hashAndSign.sig,
          ),
        ],
      ),
    );
  } catch (e) {
    return SignResult(
      error: SignRequestError(
        msg: 'Invalid signing request',
      ),
    );
  }
}