toBytes function

Uint8List toBytes(Arg data)

Implementation

Uint8List toBytes(Arg data) {
  try {
    switch (data.format) {
      case 'byte':
        {
          int val = int.tryParse(data.value, radix: 10);
          if (val >= 0 && val <= 255) {
            return intToBuffer(val);
          }
          throw new Exception('invalid byte value');
        }
      case 'int8':
        {
          int val = int.tryParse(data.value, radix: 10);
          if (val >= 0 && val <= 255) {
            return intToBuffer(val);
          }
          throw new Exception('invalid int8 value');
        }
      case 'uint64':
        {
          if (BigInt.parse(data.value).isNegative)
            throw new Exception('invalid uint64 value');
          return Uint8List(8)
            ..buffer.asByteData().setInt64(
                0, int.tryParse(data.value, radix: 10), Endian.little);
        }
      case 'int64':
        {
          return Uint8List(8)
            ..buffer.asByteData().setInt64(
                0, int.tryParse(data.value, radix: 10), Endian.little);
        }
      case 'string':
        {
          return Uint8List.fromList(utf8.encode(data.value));
        }
      case 'bigint':
        {
          return Uint8List.fromList(
              bigint.encodeBigInt(BigInt.parse(data.value)));
        }
      case 'hex':
        {
          return Uint8List.fromList(hex.decode(ethereum_utils
              .padToEven(ethereum_utils.stripHexPrefix(data.value))));
        }
      case 'dna':
        {
          return Uint8List.fromList(bigint.encodeBigInt(BigInt.parse(
              (Decimal.parse(data.value) * Decimal.parse(DNA_BASE))
                  .toString())));
        }
      default:
        {
          return Uint8List.fromList(hex.decode(ethereum_utils
              .padToEven(ethereum_utils.stripHexPrefix(data.value))));
        }
    }
  } catch (e) {
    throw new Exception(
        'cannot parse ${data.format} at index ${data.index}: ${e.message}');
  }
}