Ethereum Two Factor Authentication

Basic Functionality Story

1. Users register with information such as username, password, name and wallet address .
2. Information is stored in the database .
3. User login as usually and backend migrate a new contract and send contract address to user
4. User sends a transaction (does not send ETH, only calls the contract function and pays the gas fee) to the 2FA contract.
5. Backend check that contract have authenticated or not
6. User is authenticated.

Getting Started

Dependencies:

Backend

• Node v7.6+ (NodeJs)

Frontend

• ReactJs

Blockchain

• Truffle
• Rinkeby network
• Metamask

Setup .env

Create .env file

MNEMONIC = 'YOUR MNEMONIC',
INFURA_KEY = <YOUR INFURA KEY>

Create .enc in /backend

MONGODB_URI = 'LINK TO MONGODB', //like : MONGODB_URI = 'mongodb://dohoang123:[email protected]:47467/2fa-ethereum',
MNEMONIC = <YOUR MNEMONIC>
INFURA_KEY = <YOUR INFURA KEY>

Install local dependencies

In ./ and ./backend and ./frontend

npm install

or

yarn install

Run testnet

If run on local network

set up HDWalletProvider in contractWithBlockchain.js to any network you want

let provider = new HDWalletProvider(
  process.env.MNEMONIC,
  `https://rinkeby.infura.io/v3/${process.env.INFURA_KEY}`
);

and then

yarn truffle develop --network truffleTestnet

Then run the console

yarn truffle console --network truffleTestnet

If you run in testnet make sure your accout have eth

Run script in truffle develop

// send 1 eth
web3.eth.sendTransaction({
  from: accounts[0],
  to: 'YOUR ACCOUNT ADDRESS',
  value: web3.utils.toWei('1', 'ether')
});

Deploy contract

If you run on local network

After fauct eth from account(0) , now you have enough eth to deploy

yarn truffle migrate --reset --network truffleTestnet

If you run on Rinkeby network

yarn truffle migrate --network rinkeby

Start server

cd backend/
yarn
yarn start

Start client

cd frontend/
yarn
yarn start

# In a new terminal window, run the truffle tests

truffle test