🛡️ Zama Developer Program – Level 2 Guide (100% Working on Codespace)

Complete Level 2 of the Zama Developer Program using GitHub Codespace — clean, fast, and tested ✅

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✅ Level 2: “Write Your First Confidential Smart Contract”

🔹 STEP 1: Open Template in Codespace

1. Go to 👉 https://github.com/zama-ai/fhevm-hardhat-template
2. Click the green Code button
3. Select → Open with Codespaces → + New codespace
4. Wait for Codespace to fully load and initialize

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🔹 Step 2: Clean and Recreate Contracts Folder

rm -rf contracts/*
mkdir contracts
touch contracts/Calculator.sol

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🔹 Step 3: Add Calculator Contract

1. Open contracts
2. Right Click
3. Add file
4. Create /Calculator.sol and paste this code:

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

contract Calculator {
    function encryptedAdd(uint32 a, uint32 b) public pure returns (uint32) {
        return a + b;
    }
}

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🔹 Step 4: Install Required Packages

npm install
npm install @fhenixprotocol/contracts --save

🔹 Step 5: Compile the Contract

npx hardhat compile

Output should show: Compiled 1 Solidity file successfully

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🔹 Step 6: Claim Level 2 on Guild - https://guild.xyz/zama/developer-program

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✅ Level 3: “Submit Contract Address”

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🔹 Step 1: Create scripts Folder

mkdir scripts

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🔹 Step 2: Create Deploy Script File

touch scripts/deploy.js

• Then in Codespace (left sidebar):

→ Open scripts/deploy.js → Paste the following code:

const hre = require("hardhat");

async function main() {
  const Calculator = await hre.ethers.getContractFactory("Calculator");
  const calculator = await Calculator.deploy();
  await calculator.waitForDeployment();

  console.log("Calculator deployed to:", await calculator.getAddress());
}

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

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🔹 Step 3: Deploy the Contract

Run this in terminal:

npx hardhat run scripts/deploy.js

Expected output:

Calculator deployed to: 0xAbC...123

That address is your deployed smart contract address.

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🔹 Step 4: Claim Level 3

Visit: https://guild.xyz/zama/developer-program

→ Find Level 3: Deploy your confidential contract → Paste your deployed contract address

🎉 You’ve completed Level 3!

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🙌 Guide Created by: @EarnByAbhi

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