generateSignRequest method

SignRequest<TronSignatureResult> generateSignRequest(TronSignRequestProps props)

Build a keystone-sign-request (6101). Reply: keystone-sign-result (6102).

Implementation

SignRequest<TronSignatureResult> generateSignRequest(
  TronSignRequestProps props,
) {
  final requestId = resolveRequestId(_context, props.requestId);
  parsePath(props.path); // validate shape; the wire carries the string form
  final xfp = normalizeXfp(props.xfp);
  if (props.rawData.isEmpty) {
    throw EraSdkError('invalid-props', 'rawData must not be empty');
  }
  if (!_hex64.hasMatch(props.latestBlock.hash)) {
    throw EraSdkError(
      'invalid-props',
      'latestBlock.hash must be the FULL 64-hex block id (the device slices ref_block_hash from it)',
    );
  }

  final proto = encodeSignRequestProto(TronSignRequestProto(
    // Zero-padded to eight characters: the firmware parses this string with
    // a hex reader that yields 0 for anything shorter than 4 bytes, and a
    // zero fingerprint fails validation — a wallet whose fingerprint starts
    // with a zero byte (1 in 256) could not sign at all without the pad.
    xfpHex: xfpToHex(xfp),
    signId: uuidStringify(requestId),
    hdPath: props.path,
    timestamp: props.timestamp ?? 0,
    decimals: props.display?.decimals ?? 6,
    token: props.display?.token ?? '',
    contractAddress: props.display?.contractAddress,
    from: props.display?.from,
    to: props.display?.to,
    memo: props.display?.memo,
    value: props.display?.value,
    fee: props.display?.fee,
    latestBlock: props.latestBlock,
    rawData: props.rawData,
  ));

  final ur = Ur(
    'keystone-sign-request',
    cborEncode(cbMap([
      (1, cbBytes(gzipCompress(proto))),
      (2, cbText(props.origin ?? _context.origin)),
    ])),
  );
  return makeSignRequest(
    ur: ur,
    requestId: requestId,
    replyTypes: _replyTypes,
    context: _context,
    parse: (reply) => _parseTronSignature(reply, requestId),
  );
}