hexToBytes function

Implementation

Uint8List hexToBytes(String hex) {
  var result = new Uint8List(hex.length ~/ 2);
  for (var i = 0; i < hex.length; i += 2) {
    var num = hex.substring(i, i + 2);
    var byte = int.parse(num, radix: 16);
    result[i ~/ 2] = byte;
  }
  return result;
}