buildTransactionRequest static method

UR buildTransactionRequest({ required String txHex, required String path, required String xfp, String? address, String? origin, Uint8List? uuid, })

构造一笔链上交易签名请求 QR，显示给 Keystone 扫描

txHex : 序列化后的交易原始字节（hex 字符串） path : 派生路径，例如 "m/44'/501'/0'/0'" xfp : 主密钥指纹（hex，4 字节），例如 "12345678" address : Solana 地址（Base58 字符串），可选，用于 Keystone 显示确认 origin : 来源标识，例如应用名，可选

Implementation

static UR buildTransactionRequest({
  required String txHex,
  required String path,
  required String xfp,
  String? address,
  String? origin,
  Uint8List? uuid,
}) {
  return KeystoneSolSignRequest(
    requestId: uuid,
    signData: fromHex(txHex),
    signType: SignType.transaction,
    derivationPath: _buildKeypath(path, xfp),
    addressBytes: _encodeAddress(address),
    origin: origin,
  ).toUR();
}