Asch相关算法

Asch

1、阿希链的算法说明---中文版
Asch的共识算法：
在委托权益证明（DPOS，Delegated Proof of Stake）的基础上了加入了拜占庭容错算法（PBFT，Practical Byzantine Fault Tolerance），从而保证区块链不分叉并且有较高的性能。

密钥对生成算法：
a.Asch 系统选择的熵长度为 128bit，将之转换成符合BIP39标准的12 个单词，即主密码。
b.以主密码的sha256哈希做种子，得到hash_seed
c.再通过ed25519爱德华兹曲线签名算法对hash_seed进行签名，得到生成密钥对，包括公钥和私钥。

阿希地址生成算法：
a.对公钥buffer进行1次sha256运算，得到h1。
b.然后对h1进行r160运算得到paylaod。
c.对payload进行sha256得到checksum1。
d.对checksum1进行sha256得到checksum2。
e.拼接 paylaod和checnksum2，得到seed。
f.取seed的len(payload)+4，得到addr。
g.对addr进行base58编码得到b1。
h.“A”+b1即为生成的base58格式的阿希地址。

1.Relevant algorithms of Asch blockchain---英文版
Distributed consensus algorithm of Asch:
Asch added PBFT(Practical Byzantine Fault Tolerance) on the basis of dpos(Delegated Proof of Stake) to ensure that the block chain is consistent and has high performance.

Key pair generation algorithm:
a.The Asch system selected the entropy length of 128bit and converted it into 12 words conforming to the BIP39 standard, namely the master password.
b.Perform SHA-256 hashing on the master password,and hash_seed is obtained.
c.After the ed25519 Edwards curve signature algorithm is used to sign hash_seed, the key pair is generated, including the public key and private key.

Asch address generation algorithm:
a.Perform SHA-256 hashing on the public key buffer,get h1.
b.Perform RIPEMD-160 hashing on the h1,get payload.
c.Perform SHA-256 hashing on the payload,get checksum1.
d.Perform SHA-256 hashing on the checksum1,get checksum2.
e.Paylaod and checnksum2 join together,get seed.
f.Take the first len(payload)+4 bytes of the seed,get addr.
g.Convert the addr from a byte string into a base58 string using Base58Check encoding,get b1.
h."A" and b1 join together,get final Asch address.This is the most commonly used Asch Address format.

2.目前我们每次在github上提交完更新后，都会在travis-ci.org上自动跑测试用例，该用例是自动启动4个节点，并且在上面用mocha测试如下功能：钱包账户生成、转账、锁仓、多重签名、dapp注册、dapp充值、dapp提现等所有钱包功能。测试地址为https://travis-ci.org/AschPlatform/asch ，测试用例源代码地址为：https://github.com/AschPlatform/asch/tree/master/test 。
测试用例报告见下（附件一：Asch钱包测试报告）

At present, Asch will automatically run test cases on travis-ci.org when we commited codes to the github, the use case is automatically start four nodes, and test the following functions use mocha: wallet account generation, transfer XAS and UIA, account lock, multisignature, dapp registration, dapp deposit, dapp withdrawal etc.Test cases url is https://travis-ci.org/AschPlatform/asch, the source code of test cases is: https://github.com/AschPlatform/asch/tree/master/test.
See the test case report (appendix I: Asch wallet test report)