eosjs使用说明文档
版本说明:
Version | EOSIO/eosjs | Npm | EOSIO/eos | Docker | Node |
---|---|---|---|---|---|
DAWN-2018-04-23-ALPHA | tag:9.x.x | npm install eosjs@dawn3 | tag:DAWN-2018-04-23-ALPHA | eosio/eos:DAWN-2018-04-23-ALPHA | Docker配置 |
dawn3 | tag:8.x.x | npm install eosjs@8 | tag:dawn-v3.0.0 | eosio/eos:dawn3x | Docker配置 |
dawn2 | branch:dawn2 | npm install eosjs | branch:dawn-2.x | eosio/eos:dawn2x | Docker配置 |
支持环境
node v8+ npm 6.1.11
EOSJS
用法:
Eos = require('eosjs') // Eos = require('./src')
// eos = Eos.Localnet() // 本地127.0.0.1:8888
eos = Eos.Testnet() // 调用eos.io测试网络 testnet at eos.io
// All API methods print help when called with no-arguments.
eos.getBlock() //获取区块
// Next, your going to need nodeos running on localhost:8888
// If a callback is not provided, a Promise is returned
eos.getBlock(1).then(result => {console.log(result)})
// Parameters can be sequential or an object
eos.getBlock({block_num_or_id: 1}).then(result => console.log(result))
// Callbacks are similar
callback = (err, res) => {err ? console.error(err) : console.log(res)}
eos.getBlock(1, callback)
eos.getBlock({block_num_or_id: 1}, callback)
// Provide an empty object or a callback if an API call has no arguments
eos.getInfo({}).then(result => {console.log(result)})
API调用的文档见:
- chain.json
- account_history.json
链接配置
``` Eos = require(‘eosjs’) // Eos = require(‘./src’)
// Optional configuration.. config = { keyProvider: [‘PrivateKeys…’], // WIF string or array of keys.. httpEndpoint: ‘http://127.0.0.1:8888‘, mockTransactions: () => ‘pass’, // or ‘fail’ transactionHeaders: (expireInSeconds, callback) => { callback(null/error/, headers) }, expireInSeconds: 60, broadcast: true, debug: false, sign: true }
eos = Eos.Localnet(config)
参数说明:
- mockTransactions(可选)
- pass: 不广播,加装交易工作
- fail: 不广播,加装交易失败
- null|undefined: 广播(默认)
- transactionHeaders(可选)
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。头记录的文档见 [eosjs-api#headers][10]
### 选项
例如:`eos.transfer(params, options)`
options = { broadcast: true, sign: true, authorization: null }
- authorization `{array<auth>|auth}` - 该参数用于在多签名情况下,识别签名帐号与权限。用字符串格式,如:`account@permission` 或者使用对象,如:`object<{actor:account,permission}>`
- 如果不写,则使用默认的授权
- 如果提供授权账户,则其他账户不能被添加
- 多个账户按照账户名排序
### 用法
如果使用测试网络,需要在keyProvider配置私钥。
Eos = require(‘eosjs’) // Eos = require(‘./src’)
eos = Eos.Localnet({keyProvider: ‘5KQwrPbwdL6PhXujxW37FSSQZ1JiwsST4cqQzDeyXtP79zkvFD3’})
// Run with no arguments to print usage. eos.transfer() //显示用法
// Usage with options (options are always optional) options = {broadcast: false} //不广播此笔交易 eos.transfer({from: ‘inita’, to: ‘initb’, quantity: ‘1 EOS’, memo: ‘’}, options) //从inita发送1个EOS到initb账户
// Object or ordered args may be used. eos.transfer(‘inita’, ‘initb’, ‘2 EOS’, ‘memo’, options)
// A broadcast boolean may be provided as a shortcut for {broadcast: false} eos.transfer(‘inita’, ‘initb’, ‘1 EOS’, ‘’, false)
API方法的参数见 [eosio_system][11]
【译者注】如获取投票者信息使用 `voter_info`,获取区块节点信息使用 `producer_info`,发布资产使用 `issue`,获取区块链参数使用 `blockchain_parameters`等等
关于签名的高级用法,查看 `keyProvider`,[eosjs-keygen][12] 或者 [unit test][13]
### 简写规则(Shorthand)
在一些特殊情况下,可以使用简写,如资产类Asset和授权类Authority
例如:
- deposit: `'1 eos'` 是 `1.0000 EOS`的简写
- owner: `'EOS6MRy..'` 是 `{threshold: 1, keys: [key: 'EOS6MRy..', weight: 1]}` 的简写
- recover: `inita` 或者 `inita@active` 分别是以下的简写形式:
- `{{threshold: 1, accounts: [..actor: inita, permission: active, weight: 1]}}`
- `inita@other` 将`active`权限改为`other`
Eos = require(‘eosjs’) // Eos = require(‘./src’)
initaPrivate = ‘5KQwrPbwdL6PhXujxW37FSSQZ1JiwsST4cqQzDeyXtP79zkvFD3’ initaPublic = ‘EOS6MRyAjQq8ud7hVNYcfnVPJqcVpscN5So8BhtHuGYqET5GDW5CV’ keyProvider = initaPrivate
eos = Eos.Localnet({keyProvider})
eos.newaccount({ creator: ‘inita’, name: ‘mynewacct’, owner: initaPublic, active: initaPublic, recovery: ‘inita’ })
### 智能合约部署
`setcode`命令会在签名与广播前,将WASM的文本智能合约编译成二进制文件,编译将使用npm的 `binaryen`库,因为默认情况下,因为该库文件很大,没有被包括到`eosjs`中。
安装`binaryen`库:
> npm i binaryen@37.0.0
如果遇到`binaryen`版本与EOS版本发生不兼容,请参考 [problematic][14]
在js源码中导入binaryen:
binaryen = require(‘binaryen’); eos = Eos.Testnet({…, binaryen});
一个通过eosjs做代币发行的完整代码:(【译者注:此代码适用于Dawn2.0版本】)
Eos = require(‘eosjs’) let {ecc} = Eos.modules
initaPrivate = ‘5KQwrPbwdL6PhXujxW37FSSQZ1JiwsST4cqQzDeyXtP79zkvFD3’;//inita私钥
currencyPrivate = ecc.seedPrivate(‘currency’); currencyPublic = ecc.privateToPublic(currencyPrivate);
keyProvider = [initaPrivate, currencyPrivate];
binaryen = require(‘binaryen’);//导入编译器
eos = Eos.Localnet({keyProvider, binaryen});
eos.newaccount({ creator: ‘inita’, name: ‘currency’, owner: currencyPublic, active: currencyPublic, recovery: ‘inita’ });
contractDir = ${process.env.HOME}/eosio/dawn3/build/contracts/currency
; //合约所在目录
wast = fs.readFileSync(${contractDir}/currency.wast
);//读取wast文件,wast文件通过eosiocpp编译
abi = fs.readFileSync(${contractDir}/currency.abi
);//读取abi文件
//将智能合约发不到区块链 eos.setcode(‘currency’, 0, 0, wast); eos.setabi(‘currency’, JSON.parse(abi));
currency = null;
// eos.contract(account
// 让inita账户执行该合约,并发行一个代币CUR currency.issue(‘inita’, ‘10000.0000 CUR’, {authorization: ‘currency’});
### 原子操作
区块链级别的原子操作实例:
Eos = require(‘eosjs’)
keyProvider = [ ‘5KQwrPbwdL6PhXujxW37FSSQZ1JiwsST4cqQzDeyXtP79zkvFD3’, Eos.modules.ecc.seedPrivate(‘currency’) ]; //keyProvider的又一种写法
eos = Eos.Localnet({keyProvider});
//如果任何一个操作失败,所有操作将都失败 eos.transaction(eos => { eos.transfer(‘inita’, ‘initb’, ‘1 EOS’, ‘’); eos.transfer(‘inita’, ‘initc’, ‘1 EOS’, ‘’); } // [options], // [callback] );
//通过智能合约currency交易资产 eos.transaction(‘currency’, currency => { currency.transfer(‘inita’, ‘initb’, ‘1 CUR’, ‘’); });
//在一次交易中混合不同资产交易 eos.transaction([‘currency’, ‘eosio’], ({currency, eosio}) => { currency.transfer(‘inita’, ‘initb’, ‘1 CUR’, ‘’); eosio.transfer(‘inita’, ‘initb’, ‘1 EOS’, ‘’); });
//检查后在发送 eos.contract(‘currency’).then(currency => { currency.transaction(cur => { cur.transfer(‘inita’, ‘initb’, ‘1 CUR’, ‘’); cur.transfer(‘initb’, ‘inita’, ‘1 CUR’, ‘’); }); currency.transfer(‘inita’, ‘initb’, ‘1 CUR’, ‘’); });
### 手动配置发送transacition
优点,灵活度更高
Eos = require(‘eosjs’)
eos = Eos.Localnet({keyProvider: ‘5KQwrPbwdL6PhXujxW37FSSQZ1JiwsST4cqQzDeyXtP79zkvFD3’});
eos.transaction({ actions: [ { account: ‘eosio’, name: ‘transfer’, authorization: [{ actor: ‘inita’, permission: ‘active’ }], data: { from: ‘inita’, to: ‘initb’, quantity: ‘7 EOS’, memo: ‘testing’ } } ] });
## 后续开发更新
`eosjs`与`nodeos`的二进制格式将不断的版本更新,因此,在运行`nodeos`时需要添加参数:`--skip-transaction-signatures`。
另外,注意编译包配置文件 `package.json`中的目录结构指向 `./lib`,如果要测试时,需要从`./src`导入import,如下:
Eos = require(‘./src’); eos = Eos.Localnet(…);
除了以上提到的外,`eos`实例还可以提供很多信息。
// ‘nonce’ is a struct but could be any type or struct like: uint8 or transaction nonce = {value: ‘..’} nonceBuffer = eos.fc.toBuffer(‘nonce’, nonce) assert.deepEqual(nonce, eos.fc.fromBuffer(‘nonce’, nonceBuffer))
// Serialization for a smart-contract’s Abi: eos.contract(‘currency’, (error, c) => currency = c) issue = {to: ‘inita’, quantity: ‘1.0000 CUR’, memo: ‘memo’} issueBuffer = currency.fc.toBuffer(‘issue’, issue) assert.deepEqual(issue, currency.fc.fromBuffer(‘issue’, issueBuffer))
### 相关库文件参考
以下这些库已经被无缝集成到了`eosjs`中,也许可以被单独拿出来使用:
> var {api, ecc, json, Fcbuffer, format} = Eos.modules
- format [./format.md][15]
- 区块链名称验证
- 资产类名称格式化
- eosjs-api [ [Github][16], [NPM\]][17]
- 远程访问EOS区块链节点(nodeos)的API
- 使用此API可以直接访问区块链上只读数据(无需对交易签名)
- eosjs-ecc [ [Github][18], [NPM\]][19]
- 提供私钥、公钥、签名管理,AES,加密与解密
- 验证公钥/私钥
- 使用EOS兼容的checksums加密/解密
- 计算用于分享的秘密
- json {[api][20], [achema][21]}
- 定义了区块链的json数据操作API
- eosjs-keygen [ [Github][22], [NPM][23] ]
- 私钥与密钥管理
- Fcbuffer [ [Github][24], [NPM][25] ]
- 二进制数据序列化
- 客户端对交易二进制码签名
- 允许客户知道当前签名情况
### 区块链浏览器
获取并安装区块链浏览器,通过以下方式安装EOS测试链的区块链浏览器。
git clone https://github.com/EOSIO/eosjs.git cd eosjs npm install npm run build_browser
编辑网页文件
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