@react-native-module/randombytes/lib/es/randomBytesWithoutNativeModule.js

implementation of randomBytes for React Native

import { Buffer } from 'buffer';
import { MAX_BYTES } from './constants.js';
import { Random } from 'random-js';

function randomBytesWithoutNativeModule(size, callback) {
    const random = new Random();
    const randomHex = random.hex(size * 2);
    let randomBytes = Buffer.from(randomHex, 'hex');
    // this is the max bytes crypto.getRandomValues
    // https://github.com/crypto-browserify/randombytes/blob/f18ded32b209f0d4c637608a11ae042ae96b4c2e/browser.js#L31
    if (size > MAX_BYTES) {
        randomBytes = Buffer.from(randomBytes.subarray(0, MAX_BYTES));
    }
    if (callback != null) {
        callback(null, randomBytes);
    }
    else {
        return randomBytes;
    }
}

export { randomBytesWithoutNativeModule };