bip62 function

bool bip62(Uint8List buffer)

Check BIP62

Reference: https://github.com/bitcoin/bips/blob/master/bip-0062.mediawiki

Implementation

bool bip62(Uint8List buffer) {
  int i = 0;

  while (i < buffer.length) {
    var opcode = buffer[i];

    // is this a data PUSH?
    if (opcode >= 0 && opcode <= OPS['OP_PUSHDATA4']!) {
      var d = push_data.decode(buffer, i);

      // did reading a pushDataInt fail? empty script
      if (d == null) return false;
      i += d.size;

      // attempt to read too much data? empty script
      if (i + d.number > buffer.length) return false;

      Uint8List data = buffer.sublist(i, i + d.number);
      i += d.number;

      if (d.number > _maxScriptElementSize) return false;
      if (!_checkMinimalPush(opcode, data)) return false;

      // opcode
    } else {
      ++i;
    }
  }

  return true;
}