Update by nil-zhang

Changelog 2018.10.11

1. Add special transaction and 'add/sub' instructions
2. Add "getpeers" API to get peer list
3. Broadcast transactions to peers and remove last block tx from local Txpool
4. Add GlobalState Persistence to leveldb
5. Add StateDB to store accounts and coinbase address
6. Add leveldb storage to store blockchain

Special transaction explanation

1. "To" address is ""
2. "Data" is the instruction to "From" Account's "state"

JSON example: { "From": "16Li5cc51j2e73KW7EbuZkkemWBqYdQWCr", "To": "", "Value": 100, "Data": "add" }

Changelog 2018.09.29

1. Add PoW consensus mode
2. Add commands protocol over p2p network
3. Add "-con" param to config consensus mode at the launching time
4. Add global accounts and broadcast to all peers
5. Use default account to stake the balance in PoS mode
6. Add "candidate" to complete the validation in PoS mode
7. Test the cases of PoW and PoS to make sure the blockchain works.

Command lines to test

First console:

$ ./cmd -c chain -con pos -s lzhx_ -l 8080 -a 16Li5cc51j2e73KW7EbuZkkemWBqYdQWCr

Second console:

$ ./cmd -s lzhx_ -c chain -con pos -s lzhx_ -l 8082 -d /ip4/127.0.0.1/tcp/8080/ipfs/QmSc9eqT65DHFhMvRG6JPvihuQ7h3h62towt5Hx5KUKqpz -a 15WBVix6ddsGap7QY6mRh3u3cLKTHtzpNc

操作说明

编译可执行文件

项目cmd 目录执行go build

使用可执行文件生成新账户

./cmd -c account lzhx_ createwallet (lzhx_ 表示钱包后缀)

Your new address: 13qAPhDtk82VdLMcaUoh7jwNi5HpFX6De

使用可执行文件查看钱包地址列表

./cmd -c account lzhx_ listaddresses

13qAPhDtk82VdLMcaUoh7jwNi5HpFX6De

1LcubHwTs7AuHGxoPdwttbcbJkrrCwWUYX

1zmkxjXmisf4kvQJCUnhKRYMbpsXBdPYf

1EaKYX3U3GGjM4NoNXNVhMk7KQ1UKnTXgz

1Pz7MTSoESDmnQDMaeLijG4qCbsPdvrus6

启动链并连

接对端节点 ./cmd -c chain -s lzhx_ -l 8080 -a 13qAPhDtk82VdLMcaUoh7jwNi5HpFX6De -datadir /Users/username/goworkspace/src/Course/cmd

-s 表示 钱包后缀

-a 表示钱包地址

-datadir 表示数据存储目录，该参数为可选参数(该参数存在时，链数据将从指定目录存储和读取)

启动当前节点后日志输出一下信息

local http server listening on 127.0.0.1:8081 2018/09/21 15:06:20 I am /ip4/127.0.0.1/tcp/8080/ipfs/QmdhJPDZaLPCFjZMsuLfVtzZMNaZMPp6wT85gYdRnVcppj 2018/09/21 15:06:20 Now run "go run main.go -c chain -l 8082 -d /ip4/127.0.0.1/tcp/8080/ipfs/QmdhJPDZaLPCFjZMsuLfVtzZMNaZMPp6wT85gYdRnVcppj" on a different terminal

在另一个terminal中启动对端节点（加入-s参数表示该节点的钱包后缀名）

./cmd -s lzhx_ -c chain -l 8082 -d /ip4/127.0.0.1/tcp/8080/ipfs/QmdhJPDZaLPCFjZMsuLfVtzZMNaZMPp6wT85gYdRnVcppj

两节点正常连接后可在terminal中输入任意数字，该操作将产生新的块并同步块信息到对端节点

查看链状态、发送交易及交易打包

1.通过get形式的http请求查看链信息 e.g

path: http://127.0.0.1: < port >

return:

   {
     "Blocks": [
       {
         "index": 0,
         "timestamp": "2018-09-20 17:51:25.453600292 +0800 CST m=+0.003102402",
         "result": 0,
         "hash": "f1534392279bddbf9d43dde8701cb5be14b82f76ec6607bf8d6ad557f60f304e",
         "prevhash": "",
         "proof": 100,
         "transactions": {},
         "accounts": {
           "13qAPhDtk82VdLMcaUoh7jwNi5HpFX6De": 10000
         }
       },
       {
         "index": 1,
         "timestamp": "2018-09-20 17:51:27.893924841 +0800 CST m=+2.443408915",
         "result": 1,
         "hash": "1a32963946ab93f40d9cc9706503978c2854c86906fe691c4ebac989307a0671",
         "prevhash": "f1534392279bddbf9d43dde8701cb5be14b82f76ec6607bf8d6ad557f60f304e",
         "proof": 0,
         "transactions": null,
         "accounts": {}
       }
     ],
     "TxPool": {
       "AllTx": []
     }
   }

2.通过post形式的http接口发送交易到链上 e.g

path: http://127.0.0.1: < port > /txpool

param:

   {
    "From": "13qAPhDtk82VdLMcaUoh7jwNi5HpFX6De",
    "To": "17eeNAJcUWECkHLDgGcXwZPKrYteNLq2hm",
    "Value": 100,
    "Data": "message"
}

return:

    {
      "amount": 1,
      "recipient": "17eeNAJcUWECkHLDgGcXwZPKrYteNLq2hm",
      "sender": "13qAPhDtk82VdLMcaUoh7jwNi5HpFX6De",
      "data": "bWVzc2FnZQ=="
    }

3.通过post形式的http接口发送信息产生新块 e.g

path: http://127.0.0.1: < port > /block

param:

    {"Msg": 123}

return:

    {
      "index": 2,
      "timestamp": "2018-09-20 18:03:23.460148402 +0800 CST m=+24.501698347",
      "result": 123,
      "hash": "0ee7933883ae99f99fdc964042008426240066408ef8f0598e780a8158202f68",
      "prevhash": "e792220c169142a4561b7320005716a636a27b25bb2cb03c409a20ef64037d53",
      "proof": 0,
      "transactions": [
        {
          "amount": 1,
          "recipient": "17eeNAJcUWECkHLDgGcXwZPKrYteNLq2hm",
          "sender": "13qAPhDtk82VdLMcaUoh7jwNi5HpFX6De8",
          "data": "bWVzc2FnZQ=="
        }
      ],
      "accounts": {
        "13qAPhDtk82VdLMcaUoh7jwNi5HpFX6De": 9999,
        "17eeNAJcUWECkHLDgGcXwZPKrYteNLq2hm": 1
      }
    }

4.通过post形式的http接口查看账户余额 e.g

path: http://127.0.0.1: < port > /getbalance

param:

    {"Address": "17eeNAJcUWECkHLDgGcXwZPKrYteNLq2hm"}

return:

    1