bech32 result is not right, maybe checksum exist bug

[youngqqcn]

String humanReadablePart = "hello";
char[] data = {14, 15, 3, 31, 13};
String b = Bech32.encode(humanReadablePart, data);
System.out.println(b);   
// "hello1w0rldcs7fw6" : "hello" + Bech32.separator + encoded data + 6 char checksum

I use python bech32 library

pip3 install bech32

>>> from bech32 import bech32_encode
>>> bech32_encode("hello", [14, 15, 3, 31, 13])
'hello1w0rld80pk3y'

6 char checksum is different

[danpape]

Hi, thanks for bringing this up.

Several months ago, Pieter Wuille recommended that the bech32 algorithm be slightly changed to improve certain properties of the encoding: https://gist.github.com/sipa/a9845b37c1b298a7301c33a04090b2eb

Due to that recommendation, we have updated our c++ and java implementations: dcdpr/libbech32@698cd6d and 1d188e8

It does not appear that the python bech32 library you refer to has made that update yet: https://github.com/fiatjaf/bech32/blob/master/bech32/__init__.py#L46