JS SDK of IOST，helps developers interact with iost blockchain node, including geting block data, sending transactions, etc. It can be used in browsers and also on nodejs platform.

Installation

Using npm in your project

npm install @kunroku/iost

CDN

<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/@kunroku/[email protected]/dist/iost.min.js"></script>

exports to window.IOST global.

Sign up example

const IOST = require('@kunroku/iost');

// init iost sdk (default is for localhost network)
const iost = new IOST({
    host: 'http://127.0.0.1:30001',
    chainId: 1020,
    gasLimit: 1000000
});

const creatorId = 'admin';
const secretKey = '2yquS3ySrGWPEKywCPzX4RTJugqRh7kJSo5aehsLYPEWkUxBWA39oMrZ7ZxuM4fgyXYs2cPwh5n8aNNpH5x2VyK1';
const account = new IOST.Account(creatorId);
const kp = new IOST.KeyPair.Ed25519(IOST.Bs58.decode(secretKey));
account.addKeyPair('active', kp);
account.addKeyPair('owner', kp);

const newId = 'test001';
const newKp = IOST.KeyPair.Ed25519.randomKeyPair();
// show secret key of new account
console.log(IOST.Bs58.encode(newKp.secretKey));

const tx = iost.contract.auth.signUp(newId, IOST.Bs58.encode(newKp.publicKey), IOST.Bs58.encode(newKp.publicKey));
iost.contract.gas.pledge(creatorId, newId, 20, tx);
iost.contract.ram.buy(creatorId, newId, 1024, tx);

iost.setPublisher(account);

const handler = iost.signAndSend(tx);
handler.listen();
handler.onPending(console.log);
handler.onSuccess(console.log);
handler.onFailed(console.log);

Usage

Encoding

IOST.Bs58.encode(buf)

buffer to base58string

IOST.Bs58.decode(buf)

base58string to buffer

IOST.KeyPair instance

Ed25519 Algorithm

new IOST.KeyPair.Ed25519(secretKey)

initialize with buffer or uint8array type secret key

Secp256k1 Algorithm

new IOST.KeyPair.Secp256k1(secretKey)

initialize with buffer or uint8array type secret key

IOST.Account instance

new IOST.Account(id)

initialize with iost account id

account.addKeyPair(permission, keyPair)

add keyPair to account instance

IOST instance

new IOST(config?)

config type

{
	host?: string,
	chainId?: number,
	gasRatio?: number,
	gasLimit?: number,
	delay?: number,
	expiration?: number,
	defaultLimit?: 'unlimited' | number
}

setServerTimeDiff()

set the time difference between your environment and the node

iost.createTx()

create empty transaction instance

iost.call(contract, abi, args, tx?)

returns tx of calling smart contract

if you want to add action to already exist tx instance, you can set it the end of args

iost.setPublisher(account)

set IOST.Account to IOST instance

iost.addSigner(account, permission)

for multi signature

iost.signAndSend(tx, log?)

add signature of publisher and signer to tx and then send it

if you want to check processing time in the console, set log true

const handler = signAndSend(tx);
handler.listen();
handler.onPending(res => { console.log(res) });
handler.onSuccess(res => { console.log(res) });
handler.onFailed(res => { console.log(res) });

handler.listen(config?)

if you want to change listen config, you can set like this

handler.listen({ interval: 1000, times: 50, irreversible: true });