Deploy a contract in Monad testnet using Hardhat

• Prep your workspace

  • Node ≥ 20 & npm ≥ 10 installed.

  • In a fresh folder:

    
    npm init -y &&
    npm i -D hardhat @nomicfoundation/hardhat-ethers ethers            

  • Run npx hardhat → Create a TypeScript project when prompted (or JS if you prefer).

• Put Jenius contract in place

  • Drop MarginTradingHelper.sol into contracts/.

• Add Monad Testnet to hardhat.config.ts

  import { HardhatUserConfig } from "hardhat/config";
  import "@nomicfoundation/hardhat-ethers";
  
  const config: HardhatUserConfig = {
    solidity: "0.8.24",
    networks: {
      monadTestnet: {
        url: process.env.MONAD_RPC || "https://testnet-rpc.monad.xyz",
        chainId: 10143,
        accounts: [process.env.PRIVATE_KEY!],        // 0.05 MON from faucet required
      },
    },
  };
  export default config;

• Create a deploy script (scripts/deploy.ts)(Ask Jenius for that)

  import { ethers } from "hardhat";
  
  async function main() {
    const helper = await ethers.deployContract("MarginTradingHelper", [
      "0xb2f82D0f38dc453D596Ad40A37799446Cc89274A",   // aPriori vault
      "0xb2f82D0f38dc453D596Ad40A37799446Cc89274A",                              // aprMON ERC‑20
      "0x4B186949F31FCA0aD08497Df9169a6bEbF0e26ef",   // Kuru MarginAccount
      "0xc816865f172d640d93712C68a7E1F83F3fA63235"    // Kuru Router
    ]);
    await helper.waitForDeployment();
    console.log("Helper deployed at", helper.target);
  }
  main().catch(console.error);

• Compile & deploy

  npx hardhat compile                       
  MONAD_RPC=https://testnet-rpc.monad.xyz \
  PRIVATE_KEY=0x<yourPrivKey> \
  npx hardhat run scripts/deploy.ts --network monadTestnet
  

  On success Hardhat prints the new address.

• Verify (optional) — use Hardhat’s verify task with chain ID 10143 to publish source on MonadExplorer.

• Update env & test

  • Add HELPER_ADDR=<printed-address> to .env.

  • Run your Jenius bot; it will pick up the helper automatically.

• Troubleshoot

  • “insufficient funds” → grab more MON from faucet.

  • *chainId mismatch* → confirm Hardhat network is set to 10143.

  • Gas under‑priced → pass gasLimit: 3_000_000 or run with -gas-price <hexWei> (testnet forgiving).

    Now your Jenius‑generated helper is live on Monad Testnet—ready for bots, front‑ends, or further Hardhat scripts.