convertIntToByteList function
Convert 64-bit int to byte list. Source: https://stackoverflow.com/a/57536472/376497
Implementation
Uint8List convertIntToByteList(int number) {
final byteList = Uint8List(8);
byteList.buffer.asByteData().setInt64(0, number, Endian.big);
return byteList;
}