Account Management

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Generating Numerous Accounts

A common task for exchanges is to safely and predictably generate a large number of addresses. You can do so using one or more BIP39 mnemonics.

export class ZilliqaService {

accounts: string[] = [];

zil: Zilliqa;

constructor(api: string, mnemonics: { [mnemonic: string]: number }) {

const zilliqa = new Zilliqa(api);

this.zil = zilliqa;

// you can use one or more mnemonics to manage/generate a large number of accounts

for (let m in mnemonics) {

const num = mnemonics[m];

range(num).forEach((i) => {

const address = this.zil.wallet.addByMnemonic(m, i);

this.accounts.push(address);

});

}

}

/* truncated */

}

Exporting an Account

You may also wish to export a keypair to a portable format to use it somewhere else. We support a modified implementation of the Web3 Secret Storage Definition.

import { Zilliqa } from '@zilliqa-js/zilliqa';

import * fs from 'fs';

export class ZilliqaService {

accounts: string[] = [];

zil: Zilliqa;

constructor(api: string, mnemonics: {[mnemonic: string]: number}) {

const zilliqa = new Zilliqa(api);

this.zil = zilliqa;

// you can use one or more mnemonics to manage/generate a large number of accounts

for (let m in mnemonics) {

const num = mnemonics[m];

range(num).forEach(i => {

const address = this.zil.wallet.addByMnemonic(m, i);

this.accounts.push(address);

});

}

}

/* truncated */

export(address: string) {

// keep this secret.

const passphrase = 'something';

const json = this.zil.wallet.export(address, passphrase);

// at this point, you should safely write this to disk, or send it to

// a vault somehwere. the point is to keep it safe.

fs.writeFile('/path/to/safe/place', json);

}

/* truncated */

}

Now, you should be able to find your file containing your passphrase-encrypted private key at the path you specified. Remember to always keep this file, and especially your passphrase, secret!

Importing an Account

caution

Ethereum's implementation differs from Zilliqa's. You will not be able to decrypt a Zilliqa keystore file using web3 and vice-versa.

At some stage, you may also need to import a keystore file you had previously exported. There is a convenient facility for that.

import pify from 'pify';

import { Zilliqa } from '@zilliqa-js/zilliqa';

import * fs from 'fs';

export class ZilliqaService {

accounts: string[] = [];

zil: Zilliqa;

constructor(api: string, mnemonics: {[mnemonic: string]: number}) {

const zilliqa = new Zilliqa(api);

this.zil = zilliqa;

// you can use one or more mnemonics to manage/generate a large number of accounts

for (let m in mnemonics) {

const num = mnemonics[m];

range(num).forEach(i => {

const address = this.zil.wallet.addByMnemonic(m, i);

this.accounts.push(address);

});

}

}

/* truncated */

export(address: string) {

// keep this secret.

const passphrase = 'something';

const json = this.zil.wallet.export(address, passphrase);

// at this point, you should safely write this to disk, or send it to

// a vault somehwere. the point is to keep it safe.

fs.writeFile('/path/to/safe/place', json);

}

async addKeystoreFile(path: string, passphrase: string) {

const buf = await pify(fs.readFile)(path);

const json = buf.toString();

const address = await this.zil.wallet.addByKeystore(json, passphrase);

return address;

}

/* truncated */

These two methods allow you to securely serialise and deserialise your accounts.