Deployment Guide

Deploy EVM contracts to Selendra

Deploy EVM contracts to Selendra using Hardhat, Foundry, or Remix.

Network Configuration

Testnet (Development)

Network: Selendra Testnet
RPC: https://rpc-testnet.selendra.org
Chain ID: 1953
Currency: tSEL
Explorer: https://explorer-testnet.selendra.org
Faucet: https://faucet.selendra.org

Mainnet (Production)

Network: Selendra Mainnet
RPC: https://rpc.selendra.org
Chain ID: 1961
Currency: SEL
Explorer: https://explorer.selendra.org

Hardhat Configuration

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, // 1 Gwei
    },
    mainnet: {
      url: "https://rpc.selendra.org",
      chainId: 1961,
      accounts: [process.env.PRIVATE_KEY],
      gasPrice: 100000000, // 0.1 Gwei
    },
  },
};

Set private key: export PRIVATE_KEY=your_private_key_here

Deploy Contract

Hardhat

Create scripts/deploy.js:

async function main() {
  const ContractFactory = await ethers.getContractFactory("MyContract");
  const contract = await ContractFactory.deploy();
  await contract.deployed();

  console.log("Contract deployed:", contract.address);
  console.log("Transaction:", contract.deployTransaction.hash);
}

main().catch((error) => {
  console.error(error);
  process.exitCode = 1;
});

Deploy:

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

Foundry

Create script/Deploy.s.sol:

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

import "forge-std/Script.sol";
import "../src/MyContract.sol";

contract Deploy is Script {
    function run() external {
        vm.startBroadcast();
        MyContract myContract = new MyContract();
        vm.stopBroadcast();

        console.log("Contract deployed:", address(myContract));
    }
}

Deploy: forge script script/Deploy.s.sol --rpc-url https://rpc.selendra.org --broadcast

Remix IDE

Open Remix
Paste contract code
Go to "Deploy & Run Transactions"
Select "Injected Provider - MetaMask"
Connect to Selendra in MetaMask
Click "Deploy"

Verification

Hardhat

Install plugin: npm install --save-dev @nomicfoundation/hardhat-verify

Add to hardhat.config.js:

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

module.exports = {
  etherscan: {
    apiKey: process.env.EXPLORER_API_KEY,
    customChains: [
      {
        network: "selendra",
        chainId: 1961,
        urls: {
          apiURL: "https://explorer.selendra.org/api",
          browserURL: "https://explorer.selendra.org",
        },
      },
    ],
  },
};

Verify: npx hardhat verify --network selendra CONTRACT_ADDRESS

Manual

Visit https://explorer.selendra.org
Search contract address → "Contract" tab
Click "Verify & Publish"
Upload source, set compiler version
Click "Verify"

Gas Optimization

// Use immutable for constants
uint256 public immutable TOTAL_SUPPLY;

constructor() {
    TOTAL_SUPPLY = 1000000 * 10**18;
}

// Use calldata for external parameters
function processData(bytes calldata data) external {
    // Processing
}

Common Issues

"Insufficient funds" - Check balance with:

curl -X POST -H "Content-Type: application/json" \
  --data '{"jsonrpc":"2.0","method":"eth_getBalance","params":["YOUR_ADDRESS","latest"],"id":1}' \
  https://rpc.selendra.org

"Invalid chain ID" - Verify MetaMask shows Chain ID 1961

Transaction stuck - Use higher gas:

const tx = await contract.myFunction({
  gasPrice: ethers.parseUnits("1", "gwei"),
  gasLimit: 500000,
});

Production Checklist

Monitoring

const provider = new ethers.JsonRpcProvider("https://rpc.selendra.org");

contract.on("*", (event) => {
  console.log("Event:", event.eventName, "Block:", event.blockNumber);
});

Next Steps

Security Practices | Build dApps

Support: Telegram: t.me/selendranetwork | GitHub: github.com/selendra/selendra

Getting Started

Security

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