encodeValue static method

Tuple<String, dynamic> encodeValue(Eip712TypedData typedData, String type, dynamic data)

Encodes a value according to its type in the context of EIP-712 structured data. The method handles array types, struct types, strings, and bytes. Returns a Tuple containing the encoded type and data.

Implementation

static Tuple<String, dynamic> encodeValue(
    Eip712TypedData typedData, String type, dynamic data) {
  final isArray = _extractArrayType(type);
  if (isArray != null) {
    if (data is! List) {
      throw SolidityAbiException('Invalid data provided for array codec.',
          details: {'input': data});
    }

    if (isArray.item2 > 0 && data.length != isArray.item2) {
      throw SolidityAbiException(
        'Invalid array length: expected ${isArray.item2}, but got ${data.length}',
        details: {'input': data},
      );
    }

    final encodedData = data
        .map((item) => encodeValue(typedData, isArray.item1, item))
        .toList();
    final List<String> types = encodedData.map((item) => item.item1).toList();
    final List<dynamic> values =
        encodedData.map((item) => item.item2).toList();
    return Tuple(bytes32TypeName,
        QuickCrypto.keccack256Hash(EIP712Utils.abiEncode(types, values)));
  }

  if (typedData.types[type] != null) {
    return Tuple(bytes32TypeName, structHash(typedData, type, data));
  }
  if (type == 'string' || type == 'bytes') {
    final List<int> bytesData =
        type == 'string' ? StringUtils.encode(data) : data;
    return Tuple(bytes32TypeName, QuickCrypto.keccack256Hash(bytesData));
  }
  return Tuple(type, data);
}