Connect to Testnet

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

module.exports = {
  solidity: "0.8.19",
  networks: {
    testnet: {
      url: "https://rpc-testnet.selendra.org",
      chainId: 1953,
      accounts: [process.env.PRIVATE_KEY],
      gasPrice: 1000000000,
    },
  },
};

RPC_URL=https://rpc-testnet.selendra.org
PRIVATE_KEY=your_key
CHAIN_ID=1953

forge script script/Deploy.s.sol --rpc-url $RPC_URL --private-key $PRIVATE_KEY --broadcast

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

contract TestnetStorage {
    uint256 private storedData;
    event DataStored(uint256 newValue, address indexed storedBy);

    function store(uint256 data) public {
        storedData = data;
        emit DataStored(data, msg.sender);
    }

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

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

  const TestnetStorage = await ethers.getContractFactory("TestnetStorage");
  const storage = await TestnetStorage.deploy();
  await storage.waitForDeployment();

  const address = await storage.getAddress();
  console.log("Deployed:", address);

  await storage.store(42);
  console.log("Stored value:", (await storage.retrieve()).toString());
}

main().catch(console.error);

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

uint256 public immutable TOTAL_SUPPLY;  // Use immutable
function update(bytes calldata data) external {}  // Use calldata
function batchTransfer(address[] calldata recipients, uint256[] calldata amounts) external {}