Permalink
Branch: master
Find file Copy path
Fetching contributors…
Cannot retrieve contributors at this time
572 lines (487 sloc) 15.1 KB

eosjs简明使用手册(最新版)

作者:古千峰 2018-7-15

以下教程用于EOS正式版,已在DEV开发链和EOS1.0.5-1.0.7版本的主链上测试通过。

官方文档因为版本的原因,内容多有错误,仅供参考。

eosjs的API与http-RPC调用一致,如rpc使用get-block,则在eosjs中使用getBlock()方法。即去横岗,首字符大写

eosjs几个容易出错的地方

  • asset类型,表达方式为字符串,如:100.0000 EOS,千万注意小数点后四位,少一位都不行
  • 与链连接时需要指定chainId,可以通过cleos get info获得

1- 安装eosjs

eosjs用于对交易签名、交易等操作。 eosjs-api用于读取链上数据,只读,如果只需要读取链上数据的话,只需要使用eosjs-api

在nodejs中安装:

npm install eosjs
npm install eosjs-api

注意nodejs需要最新版,如安装过程发生错误,请用node -vnpm -v查看版本。

2- 建立eosjs与链的连接

Eos = require('eosjs')

// Optional configuration..
config = {
  keyProvider: ['PrivateKeys...'], // 配置私钥字符串
  httpEndpoint: 'http://178.62.196.196:8888', //DEV开发链url与端口
  chainId: "0b08e71a2f8caaccc2dc13244b788f5eba29462ecd5d5dea1ad8cbe9581e885a", // 通过cleos get info可以获取chainId
  mockTransactions: () => null, // 如果要广播,需要设为null
  transactionHeaders: (expireInSeconds, callback) => {
    callback(null/*error*/, headers) //手动设置交易记录头,该方法中的callback回调函数每次交易都会被调用
  },
  expireInSeconds: 60,
  broadcast: true,
  debug: false,
  sign: true,
  authorization: null // 该参数用于在多签名情况下,识别签名帐号与权限,格式如:account@permission
}

eos = Eos(config)

3- 建立eosjs-api与链的连接

如果加载了eosjs后,默认加载eosjs-api,无需单独链接eosjs-api与链

EosApi = require('eosjs-api')

// everything is optional
options = {
  httpEndpoint: 'http://178.62.196.196:8888',
  verbose: false, // API logging
  logger: { // Default logging functions
    //log: config.verbose ? console.log : '',
    error: console.error
  },
  fetchConfiguration: {}
}

eos = EosApi(options)

4- 获取帮助

不添加如何参数,可以获取该方法的使用说明,如:

eos.getBlock()

5- 获取链上最新出块信息

eos.getInfo({}).then(result => { 
	console.log(result) 
})

返回:

{ server_version: 'b195012b',
  chain_id: '0b08e71a2f8caaccc2dc13244b788f5eba29462ecd5d5dea1ad8cbe9581e885a',
  head_block_num: 209307,
  last_irreversible_block_num: 209267,
  last_irreversible_block_id: '00033173a9ccd4bdd60a92d257e9354023b0457b134797be472a236cd908bc31',
  head_block_id: '0003319ba8ddc60d80c3cd0c7a70695cfd951f51ace9a798c913384cfbae659c',
  head_block_time: '2018-07-15T01:51:07.500',
  head_block_producer: 'eoshackathon',
  virtual_block_cpu_limit: 100000000,
  virtual_block_net_limit: 1048576000,
  block_cpu_limit: 99900,
  block_net_limit: 1048576 
}

如果需要拿到某一个数据值,比如:head_block_producer,则使用:

eos.getInfo({}).then(result => { 
	console.log(result.head_block_producer) //以对象属性方式获取head_block_producer
})

6- 获取指定区块信息

eos.getBlock(200000).then(result => { console.log(result) }) //获取第200000个区块

或者:

eos.getBlock({block_num_or_id: 200000}).then(result => { console.log(result) }) //获取第200000个区块

或者:

eos.getBlock('00030d4011a6744857533a6e6d907037a94c27a2dc006b4d28125f76bed2b355').then(result => { console.log(result) }) //根据id获取区块

或者:

eos.getBlock({block_num_or_id: '00030d4011a6744857533a6e6d907037a94c27a2dc006b4d28125f76bed2b355'}).then(result => { console.log(result) }) //根据id获取区块

或者将返回值传到回调函数callback中处理:

callback = (err, res) => { err ? console.error(err) : console.log(res) }
eos.getBlock(200000, callback)

7- 获取账户余额

eos.getCurrencyBalance({ code: "eosio.token", account: "eosio", symbol: "DEV" }).then(result => console.log(result))

以上命令相当于

cleos get currency balance eosio.token eosio DEV

8- 获取某代币的信息

eos.getCurrencyStats({code: "eosio.token", symbol: "DEV"}, callback) //用上面出现的callback,下同

9- 获取账户信息

eos.getAccount({account_name: "eoshackathon"}, callback) //获取eoshackathon账户的信息

相当于:

cleos get account eoshackathon

返回:

{ account_name: 'eoshackathon',
  head_block_num: 219997,
  head_block_time: '2018-07-15T03:20:12.500',
  privileged: false,
  last_code_update: '1970-01-01T00:00:00.000',
  created: '2018-07-13T20:54:28.000',
  ram_quota: 8148,
  net_weight: 500000,
  cpu_weight: 500000,
  net_limit: { used: 145, available: 120795486, max: 120795631 },
  cpu_limit: { used: 1511, available: 11518458, max: 11519969 },
  ram_usage: 3414,
  permissions:
   [ { perm_name: 'active', parent: 'owner', required_auth: [Object] },
     { perm_name: 'owner', parent: '', required_auth: [Object] } ],
  total_resources:
   { owner: 'eoshackathon',
     net_weight: '50.0000 DEV',
     cpu_weight: '50.0000 DEV',
     ram_bytes: 8148 },
  self_delegated_bandwidth: null,
  refund_request: null,
  voter_info: null 
}

10- 获取智能合约代码

eos.getCode({ account_name: "eosio"}, callback)

获取eosio账户的所有合约代码

11- 获取智能合约ABI

eos.getAbi({ account_name: "eosio"}, callback)

12- 获取Table行数据

不成熟

13- 获取账户的Actions列表

eos.getActions({account_name: "eoshackathon", pos: 0, offset: 15}, callback) //pos和offset是指:从第pos条记录开始获取offset条Actions

14- 获取公钥对应的账户

eos.getKeyAccounts({ public_key: 公钥字符串}, callback)

如果查找到帐号,则返回[],如果该公钥没有对应帐号,则报错。 相当于:

cleos get accounts 公钥

15- 获取主账号控制的其他帐号

eos.getControlledAccounts({ controlling_account: "eoshackathon"}, callback)

16- 获取transaction交易细节

该指令有bug,慎用!

eos.getTransaction({id: "xxxx"}, callback)

17- 转账交易

首先,在链接配置config中,keyProvider: [发送方私钥] 其次,可以设置options参数如下:

options = {
    authorization: '发送方帐号@active',
    broadcast: true,
    sign: true
}
方式1:
eos.transfer('发送方帐号', '接收方帐号', '0.3000 DEV','memo')

如果需要对返回值处理:

eos.transfer('发送方帐号', '接收方帐号', '0.3000 DEV','memo', callback)

如果有options参数,则:

eos.transfer('发送方帐号', '接收方帐号', '0.3000 DEV','memo', options, callback)
方式2:

使用对象:

eos.transfer({ from: '发送方帐号', to: '接收方帐号', quantity: '0.1000 DEV', memo: '备注', callback })

如果不想广播交易,可以使用以下简便指令:

eos.transfer('发送方帐号', '接收方帐号', '0.3000 DEV','memo', false) //在最后加上false,不广播
方式3:

使用eos.transaction,构造对象执行

eos.transaction(
	{
        // ...headers,
        actions: [
            {
                account: 'eosio.token',
                name: 'transfer',
                authorization: [{
                    actor: '发送方帐号',
                    permission: 'active'
                }],
                data: {
                    from: '发送方帐号',
                    to: '接收方帐号',
                    quantity: '0.3000 DEV',
                    memo: '备注'
                }
            }
        ]
    }
    // options -- example: {broadcast: false}
)

以上命令与以下cleos相同:

cleos push action eosio.token transfer '[ "发送方帐号", "接收方帐号",  "0.3000 DEV", "备注" ]' -p 发送方帐号

18- 新建帐号

creatoraccount = "testtesttest" //主账号
newaccount = "testtest1113" //新账号
newaccount_pubkey = "EOS5LUYdLZAd3uHF5XGAeE61aTeSXWqvqxBSUq3uhqYH7kY15Drjf" //新账号的公钥

//构建transaction对象
eos.transaction(tr => {
    //新建账号
    tr.newaccount({
        creator: creatoraccount,
        name: newaccount,
        owner: newaccount_pubkey,
        active: newaccount_pubkey
    })
    
    //为新账号充值RAM
    tr.buyrambytes({
        payer: creatoraccount,
        receiver: newaccount,
        bytes: 8192
    })

    //为新账号抵押CPU和NET资源
    tr.delegatebw({
        from: creatoraccount,
        receiver: newaccount,
        stake_net_quantity: '1.0000 DEV',
        stake_cpu_quantity: '1.0000 DEV',
        transfer: 0
    })
})

19- 购买RAM

creatoraccount = "testtesttest" //主账号
newaccount = "testtest1113" //新账号

eos.transaction(tr => {
    tr.buyrambytes({
        payer: creatoraccount,
        receiver: newaccount,
        bytes: 8192 
    })

或者

eos.transaction(tr => {
    tr.buyram({
        payer: creatoraccount,
        receiver: newaccount,
        quant: 8 //以k为单位的内存,8k=8192字节
    })

20- 出售RAM

eos.transaction(tr => {
    tr.sellram({
        account: 'testtesttest',
        bytes: 1024 //出售1k内存
    })
})

21- 竞拍账号名

eos.transaction(tr => {
    tr.bidname ({
        bidder: "testtesttest",
        newname: "竞拍的名字",
        bid: 价格
    })
})

22- 抵押CPU和NET

eos.transaction(tr => {
    tr.delegatebw({
        from: "testtesttest",
        receiver: "testtesttest", //testtesttest账户为自己抵押
        stake_net_quantity: "1.0000 DEV",
        stake_cpu_quantity: "1.0000 DEV",
        transfer: 0
    })
})

23- 取消抵押(赎回)CPU和NET

eos.transaction(tr => {
    tr.undelegatebw({
        from: "testtesttest",
        receiver: "testtesttest",
        unstake_net_quantity: "0.1000 DEV", //赎回0.1个DEV
        unstake_cpu_quantity: "0.1000 DEV"
    })
})

24- 智能合约部署

如果是加载wasm合约,不用使用binaryen,如果加载wast合约,需要安装并使用binaryen,如下:

npm install binaryen@39.0.0

并用以下方式导入到js

binaryen = require('binaryen')
eos = Eos({keyProvider, binaryen})
部署合约

以官方自带的hello合约为例

fs = require('fs')
wasm = fs.readFileSync(`contracts/hello/hello.wasm`) //这个文件在客户端上,而不是在服务器上
abi = fs.readFileSync(`contracts/hello/hello.abi`)

eos.setcode('contract_name', 0, 0, wasm) // contract_name 为合约名
eos.setabi('contract_name', JSON.parse(abi)) // @returns {Promise}

25- 智能合约的执行

方法一:
eos.contract("contract_name").then(hello => {  //hello随便起的变量名
    hello.hi('axay', {                         //hi是方法名, 'axay'是该hello合约hi方法的参数
    	authorization: ['testtesttest']        //testtesttest是建立该合约的用户
    }).then(result => {
        console.log(result);
    });
});
方法二:
eos.transaction(
    {
        actions: [
            {
                account: 'contract_name',  //合约名
                name: 'hi',               //方法名,该方法在官方的hello合约中有
                authorization: [{
                    actor: 'testtesttest',
                    permission: 'active'
                }],
                data: {
                    user: 'axay'
                }
            }
        ]
    }
    // options -- example: {broadcast: false}
).then(result => console.log(result))

26- 通过eosjs发行一个代币

发行代币有两种方式,一种是通过cleos参考这里,但前提是必须要安装好EOS系统。 另一种方式是通过eosjs,无需在本机安装EOS系统。

注意:

此操作需要以eosio.token账户进行操作,因此需将eosio.token帐号的私钥导入到keyProvider数组中。但如果出于安全原因,不允许将eosio.token账户私钥加到程序中的话,则可以由发币的用户先部署eosio.token合约,然后再做接下去的操作。

第一步:创建代币

eos.transaction(
    {
        // ...headers,
        actions: [
            {
                account: 'eosio.token',       //合约名
                name: 'create',               //调用创建代币的方法
                authorization: [{
                    actor: 'eosio.token',     //必须是eosio.token
                    permission: 'active'
                }],
                data: {
                    issuer: 'testtesttest',   //代币发行方
                    maximum_supply: '10000.0000 AAA', //代币总量与名称
                    can_freeze: 0,
                    can_recall: 0,
                    can_whitelist: 0
                }
            }
        ]
    }
    // options -- example: {broadcast: false}
).then(result => console.log(result))

第二步:发行代币

eos.transaction(
    {
        // ...headers,
        actions: [
            {
                account: 'eosio.token',      //合约名
                name: 'issue',               //调用发行代币的方法
                authorization: [{
                    actor: 'testtesttest',   //必须是代币的发行方
                    permission: 'active'
                }],
                data: {
                    to: 'testtesttest',      //收到代币的帐号
                    quantity: '1000.0000 AAA',
                    memo: "testtesttest issue 1000 AAA"
                }
            }
        ]
    }
    // options -- example: {broadcast: false}
).then(result => console.log(result))

也可以将以上两步合在一起操作,如:

eos.transaction(
    {
        // ...headers,
        actions: [
            {
                account: 'eosio.token',  //合约
                name: 'create',               //方法
                authorization: [{
                    actor: 'eosio.token',
                    permission: 'active'
                }],
                data: {
                    issuer: 'testtesttest',
                    maximum_supply: '10000000.0000 GAT',
                    can_freeze: 0,
                    can_recall: 0,
                    can_whitelist: 0
                }
            },
            {
                account: 'eosio.token',  //合约
                name: 'issue',               //方法
                authorization: [{
                    actor: 'testtesttest',
                    permission: 'active'
                }],
                data: {
                    to: 'testtest1111',
                    quantity: '1000.0000 GAT',
                    memo: "testtesttest issue 1000 GAT to testtest1111"
                }
            }
        ]
    }
    // options -- example: {broadcast: false}
).then(result => console.log(result))