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Display package.json version on React app

1. Create .env file on the root directory

REACT_APP_VERSION=$npm_package_version

2. Access from environment variables on React app

const version = process.env.REACT_APP_VERSION

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[
  {
    "name": "Afar",
    "type": "living",
    "scope": "individual",
    "iso-639-3": "aar",
    "iso-639-2B": "aar",
    "iso-639-2T": "aar",
    "iso-639-1": "aa"
  },

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did:muport:QmQ3fkGTPi7wWSFqMBr9fTf4b4BRtLQXDHoiABGNjmf4MV

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create-react-app-ts() {
  if [ -n "$1" ]
  then
    create-react-app "$1" --scripts-version=react-scripts-ts
  else
    echo "Error: create-react-app-ts requires at least one argument (project_name)"
  fi
  cd "$1"
}

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How to set up web3.js with CRNA

This is a simple guide to get you started with using the Ethereum Javascript API (web3.js) with the Create React Native App project. This is not an in-depth guide.

TL;DR

If you are lazy and just want to get started, I have this project ready for you. It should work out-of-the-box.

Installation guide

1. Make sure you have Node version 6 or later installed, if not, get it on the Node website

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Using crypto NodeJS module in React-Native (step-by-step)

This tutorial will show you how to polyfill crypto and other NodeJS modules globally in a React-Native environment. Please note that these implementations are purely javascript and don't use native modules to generate random numbers

Step 1 - Install dependencies

Run the following command

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function concatBuffer(b1, b2) {
  let r = new Uint8Array(b1.byteLength + b2.byteLength);
  r.set(new Uint8Array(b1), 0);
  r.set(new Uint8Array(b2), b1.byteLength);
  return r.buffer;
};

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function b(a){return a?(a^Math.random()*16>>a/4).toString(16):([1e7]+-1e3+-4e3+-8e3+-1e11).replace(/[018]/g,b)}

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Get a Free SSL Certificate With Let’s Encrypt

Let’s Encrypt is a free, automated, and open Certificate Authority.

1. Install tools for using the Let's Encrypt certificates using Certbot

  sudo apt-get update \
  sudo apt-get install software-properties-common

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Web Cryptography API Examples

Live Table: https://diafygi.github.io/webcrypto-examples/

I couldn't find anywhere that had clear examples of WebCryptoAPI, so I wrote examples and made a live table with them. Pull requests welcome!

1. RSASSA-PKCS1-v1_5

• generateKey | importKey |