lcsouzamenezes/faucet-dapp-1

Etherem Faucet

Setup

1. Install dependencies

   npm install

Running your app locally

1. Start a hardhat node

   npx hardhat node

2. In a new terminal window, run the following command to deploy the faucet contract on localhost

   npx hardhat run scripts/deploy.js --network localhost

3. The deployed contract address will be printed to console and will also be automatically be copied to src/abis/contract-address.json.

4. Connect hardhat node to Metamask

   Open Metamask > Select the network dropdown from the top left > Select Custom RPC and enter the following details:

   • Network Name: <Enter a name for the network>
   • New RPC URL: http://127.0.0.1:8545
   • Chain ID: 31337

   Click save. You can use this network to connect to the local hardhat node.

5. Connect your local hardhat account to Metamask for making transactions

   • After running npx hardhat node you will see a list of 20 addresses logged in the terminal
   • To configure an account copy its private key from the terminal (i.e the text after Private Key:)
   • Open Metamask > Click the account icon on top right > Import Account > Paste the private key you just copied > click Import
   • You should now have the account connected with 10000 ETH

6. In a new terminal window, start your react frontend

   npm start

Deploy faucet contract - Testnet (Rinkeby) using Alchemy as Node Provider

1. Create a file by name .env inside the root directory of this project (if not already created by the contract deploy script). Paste the following lines inside this .env file

ALCHEMY_API_KEY = 'YOUR_ALCHEMY_API_KEY"
WALLET_PRIVATE_KEY = 'YOUR_WALLET_PRIVATE_KEY'

2. Replace YOUR_ALCHEMY_API_KEY with API key created using Alchemy

3. Replace YOUR_WALLET_PRIVATE_KEY with private key obtained by following these steps

   1. Click on metamask plugin icon in the browser
   2. Select Account details
   3. Click Export Private Key button and confirm your password

4. Run the following command to deploy faucet on rinkeby network

   npx hardhat run scripts/deploy.js --network rinkeby

5. The deployed contract address will be printed to console and will also be automatically be copied to .env inside the root directory.

Note: You can skip the contract deployment steps and by default the setup would use an already deployed contract.

Common hardhat console commands to interact with your contract

1. Connect to the appropriate network using Hardhat console command

   npx hardhat console --network rinkeby

2. Get balance

   $ let bal = await ethers.provider.getBalance("CONTRACT_ADDR");
   $ bal

3. Convert balance to ethers

   $ ethers.utils.formatEther(bal);