createChecksum function
Implementation
List<int> createChecksum(String hrp, List<int> data,
{String encoding = 'bech32'}) {
final ENCODING_CONST = encoding == 'bech32' ? 1 : 0x2bc830a3;
var values = _hrpExpand(hrp) + data + [0, 0, 0, 0, 0, 0];
var polymod = _polymod(values) ^ ENCODING_CONST;
var result = <int>[0, 0, 0, 0, 0, 0];
for (var i = 0; i < result.length; i++) {
result[i] = (polymod >> (5 * (5 - i))) & 31;
}
return result;
}