• 2022/07 - Switch to Chainlink VRF v2 & Update solidity compiler version to 0.8.7;
• 2022/12 - Switch to Goerli network v2 & upgrade all deps & Update solc to 0.8.16;

Decentralized application (Dapp), EVM compatible, built as a part of the programming course: Ethereum201 on academy.moralis.com.

Try it yourself: coinflip-double-up-your-eth.netlify.app/

Make sure you have the following ready:

• yarn installed
• Truffle installed globally via npm install -g truffle (developped on v5.4.17).
• Run a local blockchain via Ganache, or Ganache-cli, or register on Infura.io to deploy on an Ethereum network.
• MetaMask installed in your browser
• Cloned the repo via git clone

In your terminal, make sure you are in the COINFLIP_2.0 repo, and type:

yarn install

To deploy your smart-contracts:

• Subscribe to Chainlink VRF v2 ( Subscribtion to Chainlink VRF on Goerli ) ( LINK Faucet )
• Add your subscription id to the migration file: blockchain/migrations/1_CoinFlip_migration.js
• Run the command below to deploy to the network of your choice.

truffle migrate --network <<network name here>>

So for Goerli, type:

truffle migrate --network goerli

• Replace the contract address in src/constants.js
• Replace the abi file in src/abis/coinFlip.js
• Make sure to fund the contract with some ETH ( Faucet for the Goerli network )

Before each deploy, make sure to:

• Change the COINFLIP_ADDRESS in /src/constants.js to your deployed contracts address;
• Copy the new abi file into the src/abis folder if you've made any changes to the contracts;
• Enable/disable, and update the suitable networks in truffle-config.js;
• In the blockchain/ repo, create a file called .secret and paste your mnemonic seed phrase inside; (Make sure you add this file in your .gitignore!!!)

• Img Shields
• Font Awesome
• Jazzicon

You are now set to start your local server. Make sure you're still in COINFLIP 2.0 and type: yarn start

(back to top)