Pre-requisites

• Node.js v12+ (check with: node -v)
• npm
• An Alchemy key for interacting with the Ethereum blockchain
• An Ethereum wallet private key, which will be the only wallet able to withdraw fees from the contract
• The wallet address (starting with 0x)
• To deploy the contract on Mainnet - 0.1 ETH in that wallet needed for gas
• To deploy the contract on the Rinkeby testnet - test ETH from the Chainlink faucet

To use this code

git clone https://github.com/joonspoon/proxy-contract
cd proxy-contract
npm install

Create a file secrets.json in the project root directory containing the wallet private key and Alchemy key:

{
  "privateKey": "xxxxxxx",
  "alchemyApiKey": "xxxx"
}

To deploy the contract on the Rinkeby testnet for the first time

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

Take note of the contract address for interacting with the smart contract from now on

Check the contract has been deployed on Etherscan

To make changes to the existing contract on Rinkeby

Update scripts/upgrade.js with the address of your recently deployed contract ☝️

Edit the contract code in contracts/Swap.sol

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

To deploy the contract to a local blockchain

cd Documents/proxy-contract && npx hardhat node  # in a separate terminal window
npx hardhat run --network localhost scripts/deploy.js

To interact with the contract running on the local node using the command line

npx hardhat run --network localhost scripts/upgrade.js
npx hardhat console --network localhost
const factory = await ethers.getContractFactory('Swap');
const contract = await factory.attach('0x9fE46736679d2D9a65F0992F2272dE9f3c7fa6e0');
await contract.swap(...);

To interact with the contract running on the local node using JavaScript

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

To run the unit tests

npx hardhat test