rlp #

An Ethereum RLP library for Dart - https://pub.dartlang.org/packages/rlp

The purpose of RLP (Recursive Length Prefix) is to encode arbitrarily nested arrays of binary data, and RLP is the main encoding method used to serialize objects in Ethereum

rlp takes a String, int or List and returns an RLP encoded List<int>

Usage #

A simple usage example:

import 'package:rlp/rlp.dart';

main() {
  var encoded = Rlp.encode(["dog", "cat"]);
  print(encoded); // List<int> [200, 131, 100, 111, 103, 131, 99, 97, 116]
}

A more complex usage example:

import 'dart:typed_data';

import 'package:convert/convert.dart';
import 'package:pointycastle/pointycastle.dart';
import 'package:rlp/rlp.dart';

main() {

  const sender = Address('0xba52c75764d6f594735dc735be7f1830cdf58ddf');
  const nonce = 3515;

  var encoded = Rlp.encode([sender, nonce]);

  var out = new Digest('SHA-3/256').process(Uint8List.fromList(encoded));
  var contractAddress = hex.encode(out.sublist(12));

  print('Cryptokitties contract address is 0x$contractAddress'); // 0x06012c8cf97bead5deae237070f9587f8e7a266d

}

Features and bugs #

Please file feature requests and bugs at the issue tracker.