drivePath static method

Implementation

static HdWallet drivePath(HdWallet base, String path) {
  if (!isValidPath(path)) throw ArgumentError("Expected BIP32 Path");
  List<String> splitPath = path.split("/");
  if (splitPath[0] == "m") {
    if (!base.isMaster) {
      throw ArgumentError("wallet is not master");
    }
    splitPath = splitPath.sublist(1);
  }
  return splitPath.fold(base, (HdWallet prevHd, String indexStr) {
    int index;
    if (indexStr.substring(indexStr.length - 1) == "'") {
      index = int.parse(indexStr.substring(0, indexStr.length - 1));
      if (index > _maxUint31 || index < 0) {
        throw ArgumentError("Expected UInt31");
      }
      final f = prevHd._addDrive(index + _highBit);
      return f;
    } else {
      index = int.parse(indexStr);
      final f = prevHd._addDrive(index);
      return f;
    }
  });
}