How To Add bitcoinjs-lib Version 4.0.3 To A React Native Project

rn-bitcoinjs-lib-4.0.3_Setup.md

Newer version available. Please see 5.0.5

How To Add bitcoinjs-lib Version 4.0.3 To A React Native Project

Add/Link the following dependencies:

• yarn add [email protected] react-native-randombytes buffer-reverse buffer@5
• yarn add --dev rn-nodeify
• react-native link react-native-randombytes
• Add the following postinstall to your script in package.json: "postinstall": "rn-nodeify --install buffer,stream,assert,events,crypto,vm --hack && cd node_modules/bs58 && yarn add [email protected] && cd ../../"

Install any remaining dependencies and run postinstall.

NOTE: (If you receive an error about "shim.js" not existing just run yarn install again):

• yarn install

• Add the following to shim.js:

if (typeof Buffer.prototype.reverse === 'undefined') {
  var bufferReverse = require('buffer-reverse');

  Buffer.prototype.reverse = function () {
    return bufferReverse(this);
  };
}

• Uncomment require('crypto') at the bottom of "shim.js". Or add require('crypto') to the bottom of "shim.js" if it doesn't exist.

Resolve Item In ecpair.js

• Open ecpair.js in .../bitcoinjs-lib/src/ecpair.js and replace const randomBytes = require('randombytes') with the following: import { randomBytes } from 'react-native-randombytes'

To test if everything is working as expected place the following in render:

import "./shim";
const bitcoin = require("bitcoinjs-lib");
const keyPair = bitcoin.ECPair.makeRandom();
const { address } = bitcoin.payments.p2pkh({ pubkey: keyPair.publicKey });
console.log(address);

nice