Direct Contract Interaction

Prerequisites

Ensure that Node.js and npm are installed on your machine.

Step 1: Install Ethers.js

Use npm to install ethers.js:

npm install ethers

Step 2: Connect to the Network that You'd Like to Add Liquidity to

Connect to Ethereum, for example. You can do this using a default provider from ethers, which automatically connects to the Ethereum mainnet:

const ethers = require('ethers');
const provider = ethers.getDefaultProvider();

Step 3: Import the Contract ABI and Address

The contract ABI and address will enable ethers.js to interact with the contract. Import these values:

const contractABI = [
    {
      "inputs": [
        {
          "internalType": "uint256",
          "name": "amount",
          "type": "uint256"
        }
      ],
      "name": "deposit",
      "outputs": [],
      "stateMutability": "payable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "uint256",
          "name": "amount",
          "type": "uint256"
        }
      ],
      "name": "withdraw",
      "outputs": [],
      "stateMutability": "nonpayable",
      "type": "function"
    }
  ]; 
const contractAddress = ''  // fill with the relay contract address

Step 4: Create a Contract Instance

Now, using the provider, the contract ABI, and the contract address, you can create a contract instance:

const contract = new ethers.Contract(contractAddress, contractABI, provider);

Step 5: Create a Signer

In order to modify the blockchain state, transactions need to be signed. Create a signer from a private key:

const privateKey = 'your-private-key';
const wallet = new ethers.Wallet(privateKey);
const signer = wallet.connect(provider);

Make sure to replace 'your-private-key' with your actual private key.

Step 6: Connect Contract to Signer

Connect the contract instance to the signer:

const contractWithSigner = contract.connect(signer);

Step 7: Interact with the Contract

Now that you have a contract instance connected to a signer, you can interact with the contract's functions.

Deposit:

async function deposit(amount) {
    const transaction = await contractWithSigner.deposit(amount, { value: value });
    const receipt = await transaction.wait();
    console.log(receipt);
}

Withdraw:

async function withdraw(amount) {
    const transaction = await contractWithSigner.withdraw(amount);
    const receipt = await transaction.wait();
    console.log(receipt);
}

❗️❗️ Please review the following information before implementation❗️❗️

• Remember to approve contract before deposit if you're about to deposit ERC20 token.

• Remember to replace amount with the amount you want to deposit or withdraw.

• Remember to set value with the same amount as amount if you're about to deposit native token.