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MetaHash JS SDK

Usage

Demo portal

NodeJS

const MetaHash = require('metahash-js');

Browser

<script src="dist/metahash.js"></script>

Create new wallet

const Wallet = MetaHash.Wallet;

const wallet = new Wallet();
console.log(wallet.publicKey);
console.log(wallet.privateKey);
console.log(wallet.address);

Restore wallet from private key

const Wallet = MetaHash.Wallet;

const wallet = Wallet.fromPrivateKey('08d6d3c75c2cfd52ca94fd7db4d4fc9c3b47dc8f948e71a96566a698501e9831');
console.log(wallet.publicKey);
console.log(wallet.privateKey);
console.log(wallet.address);

Restore wallet from PEM

const Wallet = MetaHash.Wallet;

const wallet = Wallet.fromPEM(`-----BEGIN EC PRIVATE KEY-----
MHcCAQEEIHPzHxC6MPg+7d4+5fovHhO9/pB5+J9YauouHq4rrhBBoAoGCCqGSM49
AwEHoUQDQgAEWPHBuckjyxxS41w1tkf4BRjnOOtp/gbLKvd9fC8KsozQuMq0IxrD
saph7C0MTti9lxT6yDUToXDF/ovT2XDbfA==
-----END EC PRIVATE KEY-----`);
console.log(wallet.publicKey);
console.log(wallet.privateKey);
console.log(wallet.address);

Restore wallet from encrypted PEM

const Wallet = MetaHash.Wallet;

const wallet = Wallet.fromEncryptedPEM(`-----BEGIN EC PRIVATE KEY-----
Proc-Type: 4,ENCRYPTED
DEK-Info: AES-128-CBC,5ABA37C774A68C6A679058396588A42F

SYFXv6FJMj/1/uv58t1zPgC4vDojHQS8jidQMVf16CpfgPisJjBz0hB8+PeZx9cZ
8gGoBQc70s7S9cLpWK+gLtwC6sPY6iqamuU4cj/FTsN0Q4CcJj9T3YZtOBd0eaya
soHkZCNPNGVcvme0B9uBsysUxc03qgOfuo/8ez5CbZM=
-----END EC PRIVATE KEY-----`, 'Test1');
console.log(wallet.publicKey);
console.log(wallet.privateKey);
console.log(wallet.address);

Save wallet to PEM

const Wallet = MetaHash.Wallet;

const wallet = new Wallet();
const encryptedPEM = wallet.toPEM();
console.log(encryptedPEM);

Save wallet to encrypted PEM

const Wallet = MetaHash.Wallet;

const wallet = new Wallet();
const encryptedPEM = wallet.toEncryptedPEM('Test1');
console.log(encryptedPEM);

Promise API

Create and send transaction

const Wallet = MetaHash.Wallet;
const API = MetaHash.API;

const wallet = Wallet.fromPrivateKey('08d6d3c75c2cfd52ca94fd7db4d4fc9c3b47dc8f948e71a96566a698501e9831');
const api = new API();

api.getNonce({address: wallet.address}).then((nonce) => {
    const to = '0x009806da73b1589f38630649bdee48467946d118059efd6aab';
    const value = 0;
    const fee = 0;
    const data = '';
    
    const tx = wallet.createTx({to, value, fee, nonce, data});
    
    api.sendTx(tx).then((result) => {
        console.log(result);
    });
});

Other API methods

const Wallet = MetaHash.Wallet;
const API = MetaHash.API;

// Static method
API.getNodes('main').then((nodes) => {
    console.log(nodes);
});

const wallet = Wallet.fromPrivateKey('08d6d3c75c2cfd52ca94fd7db4d4fc9c3b47dc8f948e71a96566a698501e9831');
const api = new API();

api.fetchBalance({address: wallet.address}).then((result) => {
    console.log(result);
});

api.fetchHistory({address: wallet.address}).then((result) => {
    console.log(result);
});

api.getTx({hash: '7f75fdfba4bc2fe674b37d4730533edf9cb047f1f93b4f6687f4cab819eb88b6'}).then((result) => {
    console.log(result);
});

Async/Await API

Create and send transaction

const Wallet = MetaHash.Wallet;
const API = MetaHash.API;

const wallet = Wallet.fromPrivateKey('08d6d3c75c2cfd52ca94fd7db4d4fc9c3b47dc8f948e71a96566a698501e9831');
const api = new API();

const nonce = await api.getNonce({address: wallet.address});
const to = '0x009806da73b1589f38630649bdee48467946d118059efd6aab';
const value = 0;
const fee = 0;
const data = '';
    
const tx = wallet.createTx({to, value, fee, nonce, data});
    
const result = await api.sendTx(tx);
console.log(result);

Other API methods

const Wallet = MetaHash.Wallet;
const API = MetaHash.API;

// Static method
const nodes = await API.getNodes('main');
console.log(nodes);

const wallet = Wallet.fromPrivateKey('08d6d3c75c2cfd52ca94fd7db4d4fc9c3b47dc8f948e71a96566a698501e9831');
const api = new API();

const balanceResult = await api.fetchBalance({address: wallet.address});
console.log(balanceResult);

const historyResult = await api.fetchHistory({address: wallet.address});
console.log(historyResult);

const txResult = await api.getTx({hash: '7f75fdfba4bc2fe674b37d4730533edf9cb047f1f93b4f6687f4cab819eb88b6'});
console.log(txResult);