import Computer from 'bitcoin-computer'

// the smart contract
class Counter {
  constructor() { this.n = 0 }
  inc() { this.n += 1 }
}


// run the smart contract
;(async () => {
  const computer = new Computer({
    seed: 'replace this seed',
    chain: 'BSV' // 'BSV' and 'BCH' are currently supported
  })
  const counter = await computer.new(Counter, [])
  await counter.inc()
  console.log(counter)
  computer.shutdown()
})()

Run the contract using node --experimental-modules index.mjs. You will get an error message "Insufficient balance in address <your_address>"

Send a small amount of Bitcoin Cash to <your_address>, eg from a Bitcoin Cash Faucet. Run the contract again and if it worked you will see:

Counter {
  n: 1,
  _owners: [ '028b43c3e12159179c...' ],
  _amount: 2000
}

Congrats, you are now one of the first people to ever to run a smart contract on Bitcoin! Now go ahead and change the program above to create your own smart contract.

Run in the Browser

Create file .babelrc

{
  "presets": [ "@babel/preset-env" ],
  "plugins": [ [ "@babel/transform-runtime" ] ]
}

Create file index.html

<html>
  <body>
    <script src="./index.js"></script>
    <div id='el'></div>
  </body>
</html>

Create file index.js

import Computer from 'bitcoin-computer';

class Counter {
  constructor() { this.n = 0 }
  inc() { this.n += 1 }
}

; (async () => {
  const computer = new Computer({
    seed: 'replace this seed',
    chain: 'BCH' // 'BSV' and 'BCH' are currently supported
  })
  const counter = await computer.new(Counter, [])
  document.getElementById("el").innerHTML = `Counter is ${counter.n}`;
  await counter.inc()
  document.getElementById("el").innerHTML = `Counter is ${counter.n}`;

  computer.shutdown()
})()

Run the following in an empty directory

npm init -y
npm i -s bitcoin-computer
npm i -g parcel-bundler
npm i -s @babel/runtime
npm i -d @babel/plugin-transform-runtime
parcel index.html

Open your browser at http://localhost:1234. See the instructions for how to pick your own seed phrase and how to deal with the error message "Insufficient balance in address <your_address>"

Documentation

You can find more information in the Bitcoin|Computer Docs

Getting Help

Bitcoin|Computer is in alpha stage, so there will be bugs. If you have any issues, please

ask a question in the Telegram Group
create an issue on Github

Keywords

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Package last updated on 28 Apr 2020

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Install

bitcoin-computer