fjrojasgarcia / qtumjs

Qtum DApp JavaScript Library

The QTUM JavaScript library for Smart Contract development.

See documentation.

See companion tutorial.

Install

npm install qtumjs

This is a sample code snippet that transfer ERC20 tokens:

import {
  QtumRPC,
} from "qtumjs"

const repoData = require("./solar.json")
const qtum = new Qtum("http://qtum:test@localhost:3889", repoData)

const myToken = qtum.contract("zeppelin-solidity/contracts/token/CappedToken.sol")

async function transfer(fromAddr, toAddr, amount) {
  const tx = await myToken.send("transfer", [toAddr, amount], {
    senderAddress: fromAddr,
  })

  console.log("transfer tx:", tx.txid)
  console.log(tx)

  await tx.confirm(3)
  console.log("transfer confirmed")
}

The full source code.

This example uses async/await (supported natively by Node 8+).

Running Tests

docker run -it --rm \
  --name qtumjs \
  -v `pwd`:/dapp \
  -p 5889:3889 \
  hayeah/qtumportal

Enter into container:

docker exec -it qtumjs sh

Generate initial blocks:

qcli generate 600

qcli getbalance

2000000.00000000

Deploy test contracts:

sh deploy-test-contracts.sh

Build and run tests:

npm build
npm run test