Package Exports

eosjs
eosjs/lib/format
eosjs/lib/structs

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (eosjs) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

Status: Alpha (this is for eosjs developers)

Eosjs

General purpose library for the EOS blockchain.

Usage (read-only)

Eos = require('eosjs') // Or Eos = require('./src')

// API, note: testnet uses eosd at localhost (until there is a testnet)
eos = Eos.Testnet()

// All API methods print help when called with no-arguments.
eos.getBlock()

// Next, your going to need eosd 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)})

Read-only API methods and documentation are generated from chain.json.

Transaction Options

options = {broadcast: true, sign: true, expireInSeconds: N, debug: false}

Usage (read/write)

Eos = require('eosjs') // Or Eos = require('./src')

eos = Eos.Testnet({keyProvider: '5KQwrPbwdL6PhXujxW37FSSQZ1JiwsST4cqQzDeyXtP79zkvFD3'})

// All Eos transactions as of the last update are available.  Run with no
// arguments to print usage.
eos.transfer()

// Usage with options
options = {broadcast: false}
eos.transfer({from: 'inita', to: 'initb', amount: 1, memo: ''}, options)

// Object or ordered args may be used.  Options are optional.
eos.transfer('inita', 'initb', 1, 'memo')

// A broadcast boolean may be provided as a shortcut for {broadcast: false}
eos.transfer('inita', 'initb', 1, '', false)

Read-write API methods and documentation are generated from this schema.

For more advanced signing, see keyProvider in the unit test.

Shorthand

Shorthand is available for some types such as Asset and Authority.

For example:

deposit: '10 EOS' is shorthand for {amount: 10, symbol: 'EOS'}
owner: 'EOS6MRy..' is shorthand for {threshold: 1, keys: [key: 'EOS6MRy..', weight: 1]}

Eos = require('eosjs') // Or Eos = require('./src')

initaPrivate = '5KQwrPbwdL6PhXujxW37FSSQZ1JiwsST4cqQzDeyXtP79zkvFD3'
initaPublic = 'EOS6MRyAjQq8ud7hVNYcfnVPJqcVpscN5So8BhtHuGYqET5GDW5CV'
keyProvider = initaPrivate

eos = Eos.Testnet({keyProvider})

eos.newaccount({
  creator: 'inita',
  name: 'mynewacct',
  owner: initaPublic,
  active: initaPublic,
  recovery: 'inita',
  deposit: '1 EOS'
})

Contract

Eos = require('eosjs') // Or Eos = require('./src')
let {ecc} = Eos.modules

initaPrivate = '5KQwrPbwdL6PhXujxW37FSSQZ1JiwsST4cqQzDeyXtP79zkvFD3'

// New deterministic key for the currency account.  Only use a simple
// seedPrivate in production if you want to give away money.
currencyPrivate = ecc.seedPrivate('currency')
currencyPublic = ecc.privateToPublic(currencyPrivate)

keyProvider = [initaPrivate, currencyPrivate]

eos = Eos.Testnet({keyProvider})

eos.newaccount({
  creator: 'inita',
  name: 'currency',
  owner: currencyPublic,
  active: currencyPublic,
  recovery: 'inita',
  deposit: '1 EOS'
})

contractDir = `${process.env.HOME}/eosio/eos/build/contracts/currency`
wast = fs.readFileSync(`${contractDir}/currency.wast`)
abi = fs.readFileSync(`${contractDir}/currency.abi`)

// Publish contract to the blockchain
eos.setcode('currency', 0, 0, wast, abi)

eos.contract('currency', currency =>
  {
    // Transfer is one of any action from the currency.abi "actions" section 
    currency.transfer('currency', 'inita', 1)
  }
  // [options],
  // [callback]
)

Atomic Operations

Blockchain level atomic operations. All will pass or fail.

Eos = require('eosjs') // Or Eos = require('./src')

keyProvider = '5KQwrPbwdL6PhXujxW37FSSQZ1JiwsST4cqQzDeyXtP79zkvFD3'

eos = Eos.Testnet({keyProvider})

eos.transaction(tr =>
  {
    tr.transfer('inita', 'initb', 1, '')
    tr.transfer('inita', 'initc', 1, '')

    // A returned promise or thrown error is handled as expected
  }
  // options,
  // callback
)

Usage (manual)

A manual transaction provides for more flexibility.

tweak the transaction in a way this API does not provide
run multiple messages in a single transaction (all or none)

Eos = require('eosjs') // Or Eos = require('./src')

eos = Eos.Testnet({keyProvider: '5KQwrPbwdL6PhXujxW37FSSQZ1JiwsST4cqQzDeyXtP79zkvFD3'})

eos.transaction({
  scope: ['inita', 'initb'],
  messages: [
    {
      code: 'eos',
      type: 'transfer',
      authorization: [{
        account: 'inita',
        permission: 'active'
      }],
      data: {
        from: 'inita',
        to: 'initb',
        amount: 7,
        memo: ''
      }
    }
  ]
})

Development

From time-to-time the eosjs and eosd binary format will change between releases so you may need to start eosd with the --skip-transaction-signatures parameter to get your transactions to pass.

Note, package.json has a "main" pointing to ./lib. The ./lib folder is for es2015 code built in a separate step. If your changing and testing code, import from ./src instead.

Eos = require('./src')

Use Node v8+ to package-lock.json.

These libraries are exported from eosjs or may be used separately.

var {api, ecc, json, Fcbuffer} = Eos.modules

About

eosjs-api [Github, NPM]
- Remote API to an EOS blockchain node (eosd)
- Use this library directly if you need read-only access to the blockchain (don't need to sign transactions).
eosjs-ecc [Github, NPM]
- Private Key, Public Key, Signature, AES, Encryption / Decryption
- Validate public or private keys
- Encrypt or decrypt with EOS compatible checksums
- Calculate a shared secret
eosjs-json [Github, NPM]
- Blockchain definitions (api method names, blockchain operations, etc)
- Maybe used by any language that can parse json
- Kept up-to-date
Fcbuffer [Github, NPM]
- Binary serialization used by the blockchain
- Clients sign the binary form of the transaction
- Essential so the client knows what it is signing

Browser

git clone https://github.com/EOSIO/eosjs.git
cd eosjs
npm install
npm run build
# builds: ./dist/eos.js

<script src="eos.js"></script>
<script>
var eos = Eos.Testnet()
//...
</script>

Environment

Node 6+ and browser (browserify, webpack, etc)

React Native should work, create an issue if you find a bug.

eosjs