convert method Null safety

  1. @override
String convert(
  1. Bech32 input,
  2. [int maxLength = Bech32Validations.maxInputLength]
)
override

Converts input and returns the result of the conversion.

Implementation

@override
String convert(Bech32 input,
    [int maxLength = Bech32Validations.maxInputLength]) {
  var hrp = input.hrp;
  var data = input.data;

  if (hrp.length +
          data.length +
          separator.length +
          Bech32Validations.checksumLength >
      maxLength) {
    throw TooLong(
        hrp.length + data.length + 1 + Bech32Validations.checksumLength);
  }

  if (hrp.isEmpty) {
    throw TooShortHrp();
  }

  if (hasOutOfRangeHrpCharacters(hrp)) {
    throw OutOfRangeHrpCharacters(hrp);
  }

  if (isMixedCase(hrp)) {
    throw MixedCase(hrp);
  }

  hrp = hrp.toLowerCase();

  var checksummed = data + _createChecksum(hrp, data);

  if (hasOutOfBoundsChars(checksummed)) {
    // TODO this could be more informative
    throw OutOfBoundChars('<unknown>');
  }

  return hrp + separator + checksummed.map((i) => charset[i]).join();
}