Write Smart Contract

Configure Hardhat to connect with SupraEVM, write a Solidity smart contract, and create a deployment script to automate deployment using Hardhat scripts.

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Configure Hardhat for SupraEVM

Update hardhat.config.js to define the SupraEVM network, specifying the RPC URL, chain ID, and private key to enable seamless contract deployment and interaction.

• Change your hardhat.config.js file and add the following configuration:

require("@nomicfoundation/hardhat-toolbox");

module.exports = {
  solidity: "0.8.4",
  networks: {
    supra: {
      url: "https://rpc-evmstaging.supra.com/rpc/v1/eth",
      chainId: 119,
      accounts: [`0xPRIVATE_KEY`]
    }
  }
};

Create a Smart Contract File

Define a Solidity smart contract in SimpleStorage.sol to store and retrieve a uint256 value, providing a basic example for deployment on SupraEVM.

• Create a SimpleStorage.sol File

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

contract SimpleStorage {
    uint256 public storedData;

    function set(uint256 x) public {
        storedData = x;
    }

    function get() public view returns (uint256) {
        return storedData;
    }
}

Create a Deployment Script

Write a deployment script in deploy.js to automate smart contract deployment on SupraEVM using Hardhat, enabling seamless contract execution and interaction.

• Create a scripts directory and a file named deploy.js:

const { ethers } = require("hardhat");

async function main() {
    const [deployer] = await ethers.getSigners();
    console.log("Deploying contracts with the account:", deployer.address);

    const SimpleStorage = await ethers.getContractFactory("SimpleStorage");
    
    console.log("Deploying SimpleStorage...");
    const simpleStorage = await SimpleStorage.deploy();

    // Directly access the target property
    console.log("Contract Address from target property:", simpleStorage.target);
}

main().catch((error) => {
    console.error("Error:", error);
    process.exitCode = 1;
});