sign method

@override String sign()

Implementation

@override
String sign() {
  // Set the config to the default value if not given
  txData.config ??= DefaultTxConfig.create();
  final signMode = txData.config!.defaultSignMode();

  // Set the default fees
  txData.fee ??= Fee()..gasLimit = 250000.toInt64();
  if (!txData.fee!.hasGasLimit())
    throw Exception('Invalid fees: invalid gas amount specified');

  // Get the public key from the account, or generate it if the chain does not have it yet
  final secp256Key = PubKey.create()..key = wallet.publicKey;
  final pubKey = Codec.serialize(secp256Key);
  var sigData = SingleSignatureData(signMode: signMode, signature: null);

  // Set SignatureV2 with empty signatures, to set correct signer infos.
  var sig = SignatureV2(
    pubKey: pubKey,
    data: sigData,
    sequence: txData.data.sequence,
  );

  // Create the transaction builder
  final tx = txData.config!.newTxBuilder()
    ..setMsgs(txData.msgs)
    ..setSignatures([sig])
    ..setMemo(txData.memo)
    ..setFeeAmount(txData.fee!.amount)
    ..setFeePayer(txData.fee!.payer)
    ..setFeeGranter(txData.fee!.granter)
    ..setGasLimit(txData.fee!.gasLimit);

  // Generate the bytes to be signed.
  final handler = txData.config!.signModeHandler();
  final bytesToSign = handler.getSignBytes(signMode, txData.data, tx.getTx());

  // Sign those bytes
  final sigBytes = wallet.sign(dynamicToString(bytesToSign));
  txData.message = dynamicToString(bytesToSign);
  txData.signature = sigBytes;
  txData.isSigned = true;
  // Construct the SignatureV2
  sigData = SingleSignatureData(
      signMode: signMode, signature: dynamicToUint8List(sigBytes));
  sig = SignatureV2(
    pubKey: pubKey,
    data: sigData,
    sequence: txData.data.sequence,
  );
  tx.setSignatures([sig]);

  // Return the signed transaction
  final encoder = txData.config!.txEncoder();
  return dynamicToString(encoder(tx.getTx()));
}