merlin 1.0.2

Merlin is a STROBE-based transcript construction for zero-knowledge proofs.

example/example.dart

import 'dart:convert';
import 'dart:typed_data';

import 'package:convert/convert.dart';
import 'package:merlin/merlin.dart';

void main() {
  {
    //Simple Transcript
    final mt = Transcript('test protocol');

    mt.appendMessage(Uint8List.fromList(utf8.encode('some label')),
        Uint8List.fromList(utf8.encode('some data')));

    final cBytes =
        mt.extractBytes(Uint8List.fromList(utf8.encode('challenge')), 32);

    // d5a21972d0d5fe320c0d263fac7fffb8145aa640af6e9bca177c03c7efcf0615
    final cHex = hex.encode(cBytes);
    print(cHex);
  }

  {
    // Complex Transcript
    final tr = Transcript('test protocol');
    tr.appendMessage(utf8.encode('step1'), utf8.encode('some data'));

    final data = Uint8List(1024)..fillRange(0, 1024, 99);

    late List<int> chlBytes;
    for (var i = 0; i < 32; i++) {
      chlBytes = tr.extractBytes(utf8.encode('challenge'), 32);
      tr
        ..appendMessage(utf8.encode('bigdata'), data)
        ..appendMessage(utf8.encode('challengedata'), chlBytes);
    }

    // a8c933f54fae76e3f9bea93648c1308e7dfa2152dd51674ff3ca438351cf003c
    final chlHex = hex.encode(chlBytes);
    print(chlHex);
  }
}