Qtum-qnekt NPM

Qtum Ethers

A module for using Qtum through an Ethers compliant library to make it simpler to use Qtum
Upgrading from 0.0.3

public key address generation now follows QTUM behavior, the same private keys will now generate different addresses
adds support for importing WIF private keys
gas price is now specified in WEI, not Satoshis
Installation

Open a console and run
npm install qtum-ethers-wrapper
Example

import {Contract} from "ethers"
import {
    QtumProvider as Provider,
    QtumWallet as Wallet,
    QtumContractFactory as ContractFactory,
    QTUM_BIP44_PATH, // Compatible with Qtum core wallet and electrum
    SLIP_BIP44_PATH  // Compatible with 3rd party wallets
} from "qtum-ethers-wrapper";
// point Qtum Provider at Janus node https://github.com/qtumproject/janus/
const mainnetProvider = new Provider("https://janus.qiswap.com/api/");
const testnetProvider = new Provider("https://testnet-janus.qiswap.com/api/");
// or deploy your own node locally with a regtest network
// see for a pre-built docker image https://hub.docker.com/r/ripply/janus
const regtestProvider = new Provider("http://localhost:23889");

const provider = testnetProvider;
// create a wallet
const privkey = "99dda7e1a59655c9e02de8592be3b914df7df320e72ce04ccf0427f9a366ec6e"
const signer = new Wallet(
    privkey,
    provider
)
// or create a random account and get the mnemonic
// const signer = Wallet.createRandom(/*{ path = SLIP_BIP44_PATH }*/}).connect(provider);
// const {locale, path, phrase} = signer._mnemonic();
// QRC20 ABI
const ABI = [{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_value","type":"uint256"}],"name":"approve","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_from","type":"address"},{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transferFrom","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint8"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"}],"name":"balanceOf","outputs":[{"name":"balance","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transfer","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"},{"name":"_spender","type":"address"}],"name":"allowance","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"payable":true,"stateMutability":"payable","type":"fallback"},{"anonymous":false,"inputs":[{"indexed":true,"name":"owner","type":"address"},{"indexed":true,"name":"spender","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"from","type":"address"},{"indexed":true,"name":"to","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Transfer","type":"event"}];
// https://github.com/qtumproject/janus/blob/master/playground/pet-shop-tutorial/contracts/QRC20Token.sol
const BYTECODE = "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"
// QtumContractFactory is required to be used instead of standard ethers ContractFactory due to how contract addresses are computed differently
const simpleStore = new ContractFactory(ABI, BYTECODE, signer);

// simpleStore deployment example, returns address
async function deployToken() {
    const deployment = await simpleStore.deploy({
        gasLimit: "0x7a120", // 500,000
        gasPrice: "0x9502f9000" // in WEI, not Satoshis
    });
    await deployment.deployed();
    return deployment.address
}
// connect to QRC20 token and interact with it 
async function transferToken(contractAddress, from, to, value) {
    const qrc20 = new Contract(contractAddress, QRC_ABI, signer)
    const name = await qrc20.transfer(from, to, value,
        {
            gasLimit: "0x62521", // 62521
            gasPrice: "0x9502f9000", // in WEI, not Satoshis
        }
    );
}

const contractAddress = await deployToken();
await transferToken(contractAddress, "0x...", "0x...", 1);