🔐 Universal FHEVM SDK

A framework-agnostic toolkit that helps developers build confidential dApps with ease. Built with a modular adapter architecture that works seamlessly across React, Next.js, Vue, and Node.js environments.

🎥 Video Demo

Watch the Universal FHEVM SDK in action! See live demos of all showcases and learn how to use the adapters in your projects.

👉 Watch on YouTube

🌐 Live Examples

All examples are running with real FHEVM interactions on Sepolia testnet:

React Showcase: https://react-showcase-1738.up.railway.app/
Next.js Showcase: https://nextjs-showcase-1661.up.railway.app/
Vue Showcase: https://vue-showcase-2780.up.railway.app/
Node.js Showcase: packages/node-showcase/

Contract Details (FHEVM 0.9.0):

FHE Counter Contract: 0x1b45fa7b7766fb27A36fBB0cfb02ea904214Cc75
Ratings Contract: 0x0382053b0eae2A4A45C4A668505E2030913f559e
Voting Contract: 0x4D15cA56c8414CF1bEF42B63B0525aFc3751D2d1
Network: Sepolia testnet (Chain ID: 11155111)
FHEVM Version: 0.9.0
Relayer SDK: 0.3.0-5

🌍 Languages / Langues / 语言

📐 Architecture Overview

SDK Architecture

┌──────────────────────────────────────────────────────────────────────┐
│                    Universal FHEVM SDK                               │
│                      packages/fhevm-sdk/                               │
└──────────────────────────────────────────────────────────────────────┘
                                  │
          ┌───────────────────────┼───────────────────────┐
          │                       │                       │
    ┌─────▼─────┐          ┌───────▼───────┐      ┌───────▼───────┐
    │   CORE    │          │   ADAPTERS    │      │   SHOWCASES   │
    │src/core/  │          │src/adapters/  │      │  packages/    │
    └─────┬─────┘          └───────┬───────┘      └───────┬───────┘
          │                        │                       │
    ┌─────┴─────────────────────────────────────────────────────┐
    │                                                             │
    │  ┌──────────┐     ┌──────────┐     ┌──────────┐           │
    │  │fhevm.ts  │     │contracts.│     │index.ts  │           │
    │  │          │     │ts        │     │(exports) │           │
    │  │-initialize│    │          │     └──────────┘           │
    │  │-createEnc│    │-FhevmCon │                              │
    │  │-decrypt  │    │tract     │                              │
    │  │-publicDec│    └──────────┘                              │
    │  │-test/    │                                               │
    │  └──────────┘                                               │
    │                                                             │
    └─────────────────────────────────────────────────────────────┘
                                                                  
          ┌───────────────────────────────────────┐
          │                                       │
    ┌─────▼─────┐      ┌─────▼─────┐    ┌─────▼─────┐
    │  react.ts │      │  vue.ts   │    │  node.ts  │
    │           │      │           │    │           │
    │useWallet  │      │useWalletVue│   │FhevmNode  │
    │useFhevm   │      │useFhevmVue │   │(class)    │
    │useContract│      │useContract │   └───────────┘
    │useEncrypt │      │useEncrypt  │
    │useDecrypt │      │useDecrypt  │
    │useFhevmOps│      │useFhevmOps │
    └───────────┘      └───────────┘
                                                                  
          ┌───────────────────────────────────────┐
          │                                       │
    ┌─────▼─────────┐  ┌─────▼─────────┐  ┌─────▼─────────┐
    │react-showcase │  │nextjs-showcase │  │ vue-showcase  │
    │               │  │                │  │               │
    │App.tsx        │  │page.tsx        │  │App.vue         │
    │FheCounter     │  │components/     │  │components/     │
    │FheRatings     │  │FHECounter      │  │FHECounter      │
    │FheVoting      │  │FHERatings      │  │FHERatings      │
    │               │  │SimpleVoting    │  │SimpleVoting    │
    │               │  │test/           │  │test/           │
    └───────────────┘  └────────────────┘  └───────────────┘
                                            
    ┌─────────────────────────────────────────┐
    │        node-showcase                    │
    │                                         │
    │  index.ts     server.ts    explorer.ts  │
    │  counter.ts   voting.ts    ratings.ts   │
    │                                         │
    └─────────────────────────────────────────┘

Data Flow Architecture

┌─────────────────┐      ┌─────────────────┐      ┌─────────────────┐
│ react-showcase  │      │ vue-showcase    │      │ node-showcase   │
│                 │      │                 │      │                 │
│ App.tsx         │      │ App.vue         │      │ index.ts        │
│ FheCounter.tsx  │      │ FheCounter.vue  │      │ counter.ts      │
│ FheRatings.tsx  │      │ FheRatings.vue  │      │ voting.ts       │
│ FheVoting.tsx   │      │ FheVoting.vue   │      │ ratings.ts      │
└────────┬────────┘      └────────┬────────┘      └────────┬────────┘
         │                        │                        │
         │ import { useWallet,    │ import { useWalletVue,│ import { FhevmNode
         │         useFhevm,      │         useFhevmVue } │         } from
         │         useEncrypt,    │         } from         │         '@fhevm-sdk'
         │         useDecrypt }   │         '@fhevm-sdk'   │
         │ from '@fhevm-sdk'      │                        │
         │                        │                        │
         └────────────────────────┼────────────────────────┘
                                  │
                    ┌─────────────▼─────────────┐
                    │   @fhevm-sdk/src/          │
                    │                           │
                    │   ┌─────────────────────┐ │
                    │   │  adapters/react.ts  │ │
                    │   │  adapters/vue.ts     │ │
                    │   │  adapters/node.ts   │ │
                    │   └──────────┬──────────┘ │
                    │              │            │
                    │   ┌──────────▼──────────┐ │
                    │   │   core/index.ts     │ │
                    │   │   core/fhevm.ts     │ │
                    │   │   core/contracts.ts │ │
                    │   └──────────┬──────────┘ │
                    └──────────────┼────────────┘
                                   │
                    ┌──────────────▼──────────────┐
                    │      Zama Relayer SDK       │
                    │   (@zama-fhe/relayer-sdk)   │
                    │                             │
                    │   ┌──────────────────────┐ │
                    │   │ createInstance()      │ │
                    │   │ createEncryptedInput │ │
                    │   │ decryptValue()       │ │
                    │   │ publicDecrypt()      │ │
                    │   └──────────────────────┘ │
                    └─────────────────────────────┘

🏗️ Project Structure

fhevm-react-template/
├── packages/
│   ├── fhevm-sdk/                    # Universal FHEVM SDK Core
│   │   ├── src/
│   │   │   ├── core/                 # Core FHEVM functionality
│   │   │   │   ├── fhevm.ts         # FHEVM client initialization
│   │   │   │   ├── encryption.ts    # Encryption operations
│   │   │   │   └── decryption.ts    # Decryption operations
│   │   │   └── adapters/             # Framework-specific adapters
│   │   │       ├── react.ts          # React hooks (re-exports)
│   │   │       ├── useWallet.ts      # Wallet connection hook
│   │   │       ├── useFhevm.ts       # FHEVM instance hook
│   │   │       ├── useContract.ts    # Contract interaction hook
│   │   │       ├── useEncrypt.ts     # Encryption hook
│   │   │       ├── useDecrypt.ts     # Decryption hook
│   │   │       ├── useFhevmOperations.ts  # Combined operations hook
│   │   │       ├── vue.ts            # Vue composables
│   │   │       └── node.ts           # Node.js class adapter
│   │   └── dist/                     # Built output
│   │
│   ├── react-showcase/               # React Example
│   │   ├── src/
│   │   │   ├── App.tsx               # Main app (uses adapters)
│   │   │   └── components/
│   │   │       ├── FheCounter.tsx    # Uses useEncrypt, useDecrypt
│   │   │       ├── FheRatings.tsx    # Uses useEncrypt, useDecrypt
│   │   │       └── FheVoting.tsx    # Uses useEncrypt
│   │
│   ├── nextjs-showcase/              # Next.js Example
│   │   ├── app/
│   │   │   └── page.tsx              # Main page (uses adapters)
│   │   └── components/                # Same as React showcase
│   │
│   ├── vue-showcase/                  # Vue Example
│   │   ├── src/
│   │   │   ├── App.vue               # Main app (uses composables)
│   │   │   └── components/
│   │   │       ├── FheCounter.vue   # Uses useEncryptVue, useDecryptVue
│   │   │       ├── FheRatings.vue   # Uses useEncryptVue, useDecryptVue
│   │   │       └── FheVoting.vue    # Uses useEncryptVue
│   │
│   ├── node-showcase/                 # Node.js Example
│   │   ├── src/
│   │   │   ├── index.ts              # Main entry (uses FhevmNode)
│   │   │   ├── counter.ts            # Counter demo
│   │   │   ├── voting.ts             # Voting demo
│   │   │   └── ratings.ts            # Ratings demo
│   │
│   └── hardhat/                       # Smart Contracts
│       ├── contracts/                 # Solidity contracts
│       └── deploy/                    # Deployment scripts
│
├── pnpm-workspace.yaml                 # Monorepo configuration
└── README.md                           # This file

🔧 Adapter System

How Adapters Work

The Universal FHEVM SDK uses a clean adapter architecture where:

Core provides framework-agnostic FHEVM operations
Adapters wrap core functionality in framework-specific APIs
Showcases demonstrate real-world usage with adapters

React/Next.js Adapters

Hooks-based API - Similar to Wagmi pattern:

import { useWallet, useFhevm, useEncrypt, useDecrypt, useContract } from '@fhevm-sdk';

function MyComponent() {
  // Wallet connection
  const { address, isConnected, chainId, connect, disconnect } = useWallet();
  
  // FHEVM instance
  const { status, initialize, isInitialized } = useFhevm();
  
  // Contract interaction
  const { contract, isReady } = useContract(contractAddress, abi);
  
  // Encryption
  const { encrypt, isEncrypting, error: encryptError } = useEncrypt();
  
  // Decryption (FHEVM 0.9.0)
  const { decrypt, publicDecrypt, decryptMultiple, isDecrypting, error: decryptError } = useDecrypt();
  
  // Usage example
  const handleIncrement = async () => {
    const encrypted = await encrypt(contractAddress, address, 1);
    await contract.increment(encrypted.encryptedData, encrypted.proof);
  };
  
  // Self-relaying decryption example (for voting)
  const handleTallyReveal = async (sessionId) => {
    const tx = await contract.requestTallyReveal(sessionId);
    const receipt = await tx.wait();
    const event = receipt.logs.find(log => {
      const parsed = contract.interface.parseLog(log);
      return parsed?.name === 'TallyRevealRequested';
    });
    const { yesVotesHandle, noVotesHandle } = contract.interface.parseLog(event).args;
    const { cleartexts, decryptionProof, values } = await decryptMultiple(
      contractAddress,
      signer,
      [yesVotesHandle, noVotesHandle]
    );
    await contract.resolveTallyCallback(sessionId, cleartexts, decryptionProof);
  };
  
  return (
    <div>
      {!isConnected && <button onClick={connect}>Connect Wallet</button>}
      {isConnected && <button onClick={handleIncrement}>Increment</button>}
    </div>
  );
}

Vue Adapters

Composables-based API - Vue 3 Composition API:

<script setup lang="ts">
import { useWalletVue, useFhevmVue, useEncryptVue, useDecryptVue } from '@fhevm-sdk';

// Wallet connection
const { address, isConnected, chainId, connect, disconnect } = useWalletVue();

// FHEVM instance
const { status, initialize, isInitialized } = useFhevmVue();

// Encryption
const { encrypt, isEncrypting, error: encryptError } = useEncryptVue();

// Decryption (FHEVM 0.9.0)
const { decrypt, publicDecrypt, decryptMultiple, isDecrypting, error: decryptError } = useDecryptVue();

// Usage example
const handleIncrement = async () => {
  const encrypted = await encrypt.value(contractAddress, address.value, 1);
  await contract.increment(encrypted.encryptedData, encrypted.proof);
};
</script>

<template>
  <div>
    <button v-if="!isConnected" @click="connect">Connect Wallet</button>
    <button v-if="isConnected" @click="handleIncrement">Increment</button>
  </div>
</template>

Node.js Adapter

Class-based API - For server-side operations:

import { FhevmNode } from '@fhevm-sdk';

const fhevm = new FhevmNode({
  rpcUrl: 'https://sepolia.infura.io/v3/YOUR_KEY',
  privateKey: 'YOUR_PRIVATE_KEY',
  chainId: 11155111
});

await fhevm.initialize();

// Encrypt
const encrypted = await fhevm.encrypt(contractAddress, walletAddress, 1);

// Decrypt
const decrypted = await fhevm.decrypt(handle, contractAddress);

// Public decrypt
const publicDecrypted = await fhevm.publicDecrypt(handle);

// Execute transaction
const contract = fhevm.createContract(contractAddress, abi);
await fhevm.executeEncryptedTransaction(contract, 'increment', encrypted);

🚀 Quick Start

Option 1: NPX Packages (Recommended)

Create a new FHEVM project instantly:

# React
npx create-fhevm-react my-app
cd my-app
npm install && npm start

# Next.js
npx create-fhevm-nextjs my-app
cd my-app
npm install && npm run dev

# Vue 
npx create-fhevm-vue my-app
cd my-app
npm install && npm run dev

Option 2: Development Environment

Clone and run the full development environment:

# 1. Clone repository
git clone https://github.com/your-username/fhevm-react-template.git
cd fhevm-react-template

# 2. Install dependencies
pnpm install

# 3. Build SDK
pnpm sdk:build

# 4. Run showcase
pnpm --filter react-showcase start      # React on :3000
pnpm --filter nextjs-showcase dev      # Next.js on :3001
pnpm --filter vue-showcase dev         # Vue on :3003
pnpm --filter node-showcase explorer   # Interactive CLI mode (recommended)
pnpm --filter node-showcase start      # HTTP server mode
pnpm --filter node-showcase cli        # Non-interactive CLI mode

HTTP Server Mode

Run the following only in the node-showcase dir as an HTTP server with API endpoints:

# Start the HTTP server
pnpm start

# Server runs on http://localhost:3001
# Available endpoints:
# - GET  /          - List available endpoints
# - GET  /health    - Health check
# - GET  /config    - Get FHEVM configuration
# - POST /counter   - Run counter demo
# - POST /voting    - Run voting demo
# - POST /ratings   - Run ratings demo
# - POST /run-all   - Run all demos

Test endpoints using PowerShell:

# Run counter demo
Invoke-RestMethod -Uri http://localhost:3001/counter -Method POST

# Run voting demo
Invoke-RestMethod -Uri http://localhost:3001/voting -Method POST

# Get configuration
Invoke-RestMethod -Uri http://localhost:3001/config -Method GET

Non-Interactive CLI Mode

Run all demos sequentially without interaction:

# Run all demos at once
pnpm cli

# Output includes:
# - Counter demo: Increment → Decrement → Decrypt
# - Voting demo: Create session → Vote
# - Ratings demo: Submit rating → Public decrypt stats

🛠️ Development

# Interactive CLI mode (recommended for testing)
pnpm explorer

# HTTP server mode
pnpm start

# Non-interactive CLI mode
pnpm cli

# Development mode (watch HTTP server)
pnpm dev

# Build TypeScript
pnpm build

🎯 FHEVM Explorer - Interactive Demo Experience

The FHEVM Explorer is an interactive CLI wizard that provides a guided, user-friendly way to explore the Universal FHEVM SDK capabilities. It's the recommended way to experience FHEVM demos step-by-step.

What the Explorer Does

The Explorer offers a beautiful, context-aware interface that guides you through FHEVM operations:

🌐 Interactive Menu - Navigate through different demo options with arrow keys
🔢 Counter Demo - Experience increment/decrement operations with encrypted values
- Interactive prompts for increment/decrement amounts
- Real-time transaction feedback
- Decryption results display
🗳️ Voting Demo - Explore encrypted voting systems
- Create voting sessions or use existing ones
- Choose votes (Yes/No) with encryption
- View encrypted results after voting
⭐ Ratings Demo - Submit encrypted ratings and reviews
- Create review cards
- Submit encrypted ratings with user input
- View public decrypted statistics
🔍 Test Mode - Verify your setup before running demos
- Check environment variables configuration
- Verify network connection
- Test wallet setup
- Validate FHEVM client initialization
- Verify contract accessibility
🎯 Run All Demos - Execute all demos sequentially in one session
📊 Session Summary - Track all completed demos with timestamps and results

Key Features

Beautiful UI - Color-coded output with loading spinners and progress indicators
Guided Experience - Step-by-step prompts that walk you through each operation
Real Transactions - All demos use actual blockchain transactions on Sepolia testnet
Error Handling - Helpful error messages and recovery suggestions
Session Tracking - Keep track of all demos you've completed with detailed summaries

Example Session Flow

🌐 Welcome to FHEVM Explorer!
Universal FHEVM SDK - Interactive Demo Experience

   Explore the world of confidential computing on blockchain
   Experience encrypted operations with guided demos

✅ FHEVM environment ready!
   Wallet: 0xb8c81a641A4A4C47d11e5464C77EdcB9737784CC
   Balance: 0.042681970725989092 ETH
   Network: Sepolia (11155111)

? Choose your FHEVM demo:
❯ 🔢 Counter Demo - Increment/Decrement Operations
  🗳️  Voting Demo - Encrypted Voting System
  ⭐ Ratings Demo - Review Cards with Encrypted Ratings
  🔍 Test Mode - Verify Setup Only
  🎯 Run All Demos
  ❌ Exit Explorer

How to Use

# Navigate to node-showcase
cd packages/node-showcase

# Start the interactive explorer
pnpm explorer

The Explorer will:

Initialize your FHEVM environment and verify configuration
Display an interactive menu with all available demos
Guide you through each demo with prompts and feedback
Show real-time transaction status and results
Track your session and provide a summary at the end

This is the perfect tool for developers learning FHEVM or demonstrating the SDK's capabilities to others! <<<<<<< Updated upstream

=======

Stashed changes

📚 Showcase Documentation

Each showcase demonstrates real-world adapter usage:

React Showcase - React hooks usage
Next.js Showcase - Next.js with React hooks
Vue Showcase - Vue composables usage
Node.js Showcase - Server-side operations
- 🌐 Interactive CLI Mode - Guided wizard with prompts (pnpm explorer)
- 🌐 HTTP Server Mode - REST API with endpoints (pnpm start)
- 🌐 Non-Interactive CLI Mode - Sequential execution (pnpm cli)

🧪 Testing

All showcases include comprehensive FHEVM contract tests in their respective test/ directories:

packages/react-showcase/test/ - React showcase tests
packages/nextjs-showcase/test/ - Next.js showcase tests
packages/vue-showcase/test/ - Vue showcase tests

Each test directory contains:

FHECounter.test.js - Counter contract tests (increment, decrement, edge cases)
FHERatings.test.js - Ratings contract tests (card creation, encrypted ratings, public decryption)
SimpleVoting.test.js - Voting contract tests (session creation, encrypted voting, tally reveal)

Running Tests

# Run all showcase tests
pnpm test:showcases

# Run tests for a specific showcase
pnpm test:react      # React showcase tests
pnpm test:nextjs     # Next.js showcase tests
pnpm test:vue        # Vue showcase tests

# Run from a specific showcase directory
cd packages/react-showcase && pnpm test
cd packages/nextjs-showcase && pnpm test
cd packages/vue-showcase && pnpm test

# Run Hardhat tests (includes all showcase tests)
pnpm hardhat:test

Tests run in Hardhat's FHEVM mock environment, allowing fast local testing without a live network.

🏆 Key Features

✅ Framework-Agnostic Core

Single core implementation used by all adapters
No framework-specific dependencies in core
Easy to extend with new adapters

✅ Wagmi-like API

Familiar patterns for web3 developers
Hooks-based (React) and composables-based (Vue)
Clean, intuitive interface

✅ TypeScript Support

Full type safety across all adapters
Excellent IDE support
Comprehensive type definitions

✅ Real FHEVM Operations (0.9.0)

EIP-712 signature-based decryption
Public decryption support
Self-relaying decryption pattern (event-driven)
Multiple handle decryption (decryptMultiple)
Encrypted transaction execution
No mocks - all real blockchain interactions

✅ Multiple Demo Scenarios (FHEVM 0.9.0)

Counter Demo: Increment/decrement with EIP-712 user decryption
Ratings Demo: Encrypted ratings with public decryption
Voting Demo: Encrypted voting with self-relaying decryption (event-driven tally reveal)

🎯 Usage Examples

React Component

import { useWallet, useFhevm, useEncrypt, useDecrypt } from '@fhevm-sdk';

export default function FheCounter() {
  const { address, isConnected, connect } = useWallet();
  const { status, initialize } = useFhevm();
  const { encrypt } = useEncrypt();
  const { decrypt } = useDecrypt();
  
  useEffect(() => {
    if (isConnected && status === 'idle') {
      initialize();
    }
  }, [isConnected, status, initialize]);
  
  const handleIncrement = async () => {
    const encrypted = await encrypt(contractAddress, address, 1);
    // Execute transaction...
  };
  
  return <div>...</div>;
}

Vue Component

<script setup lang="ts">
import { useWalletVue, useFhevmVue, useEncryptVue } from '@fhevm-sdk';

const { address, isConnected, connect } = useWalletVue();
const { status, initialize } = useFhevmVue();
const { encrypt } = useEncryptVue();

watch(() => isConnected.value, (newVal) => {
  if (newVal && status.value === 'idle') {
    initialize();
  }
});
</script>

<template>
  <div>...</div>
</template>

Node.js Script

import { FhevmNode } from '@fhevm-sdk';

async function main() {
  const fhevm = new FhevmNode({ rpcUrl, privateKey, chainId });
await fhevm.initialize();

  const encrypted = await fhevm.encrypt(contractAddress, walletAddress, 1);
  const contract = fhevm.createContract(contractAddress, abi);
  await fhevm.executeEncryptedTransaction(contract, 'increment', encrypted);
}

📋 Requirements

Node.js 18+
pnpm (recommended) or npm
MetaMask (for frontend examples)
Sepolia ETH (for transactions)

🔗 Related Documentation

📝 License

MIT License - see LICENSE file for details

🤝 Contributing

Contributions are welcome! Please see our contributing guidelines for more information.

Built with Privacy for the Zama Universal FHEVM SDK Bounty

Name		Name	Last commit message	Last commit date
Latest commit History 156 Commits
packages		packages
public		public
scripts		scripts
.gitignore		.gitignore
.gitmodules		.gitmodules
FHEVM_MIGRATION_COMPARISOn.md		FHEVM_MIGRATION_COMPARISOn.md
LICENSE		LICENSE
README.fr.md		README.fr.md
README.md		README.md
README.zh.md		README.zh.md
package.json		package.json
pnpm-lock.yaml		pnpm-lock.yaml
pnpm-workspace.yaml		pnpm-workspace.yaml
railway.json		railway.json
tsconfig.json		tsconfig.json

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🔐 Universal FHEVM SDK

🎥 Video Demo

🌐 Live Examples

🌍 Languages / Langues / 语言

📐 Architecture Overview

SDK Architecture

Data Flow Architecture

🏗️ Project Structure

🔧 Adapter System

How Adapters Work

React/Next.js Adapters

Vue Adapters

Node.js Adapter

🚀 Quick Start

Option 1: NPX Packages (Recommended)

Option 2: Development Environment

HTTP Server Mode

Non-Interactive CLI Mode

🛠️ Development

🎯 FHEVM Explorer - Interactive Demo Experience

What the Explorer Does

Key Features

Example Session Flow

How to Use

📚 Showcase Documentation

🧪 Testing

Running Tests

🏆 Key Features

✅ Framework-Agnostic Core

✅ Wagmi-like API

✅ TypeScript Support

✅ Real FHEVM Operations (0.9.0)

✅ Multiple Demo Scenarios (FHEVM 0.9.0)

🎯 Usage Examples

React Component

Vue Component

Node.js Script

📋 Requirements

🔗 Related Documentation

📝 License

🤝 Contributing

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