How To Add bitcoinjs-lib Version 4.0.2 To A React Native Project

rn-bitcoinjs-lib-4.0.2_Setup.md

Newer version available. Please see 4.0.3

How To Add bitcoinjs-lib Version 4.0.2 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);

@Vanclief, I've updated the postinstall script in the instructions above to:

"postinstall": "rn-nodeify --install buffer,stream,assert,events,crypto,vm --hack && cd node_modules/bs58 && yarn add [email protected] && cd ../../"

After updating the postinstall script simply run yarn install again.

This will ensure the base-x version is always set to 3.0.4 to avoid the breaking changes in 3.0.5. This is not ideal, but until the change mentioned above is implemented or the base-x package becomes stable through some other means this solution should get you up and running. If it continues to give you any issues just let me know, I'll be happy to help.