The Zama Bounty Program aims to inspire and incentivize the developer community to contribute to the Zama Confidential Blockchain Protocol.

Each season, we introduce a new bounty that addresses a specific challenge. With this initiative, we invite developers to collaborate with us in advancing the FHE ecosystem.

For this season, the challenge is to build an universal FHEVM SDK; a framework-agnostic frontend toolkit that helps developers run confidential dApps with ease. The prize pool for this challenge is $10,000.

Important dates

• Start date: October 8, 2025
• Submission deadline: October 31, 2025 (23:59, Anywhere On Earth)

Overview

Many of you have already explored our fhevm-react-template. It works, but it’s not perfect.

This season, we’re inviting you to build the next generation of that template: a universal FHEVM SDK that makes building confidential frontends simple, consistent, and developer-friendly.

This SDK should:

• Be framework-agnostic (usable in Node.js, Next.js, Vue, React, or any frontend setup).
• Serve as a wrapper around all required packages, so developers don’t need to worry about scattered dependencies.
• Provide a wagmi-like structure to make it intuitive for web3 developers.
• Enable quick setup for encryption and decryption flows while following Zama’s official SDKs and guidelines.

How to start?

1. Fork the repo: fhevm-react-template.
2. Start making changes. You’re free to delete anything and everything; even start from a blank slate — but make sure you preserve the commit history by forking first.

⚠️ Submissions that are not forks will not be considered.

Tips:

• ‍Focus on the FHEVM SDK. The Next.js code should only serve as a showcase/example of how the SDK works, not as the main deliverable.
• Help yourself with what's already written in: packages/fhevm-sdk.‍
• Check out GitHub issues for inspiration and community feedback.
• Your end result should showcase a complete setup that allows developers to:
  1. Install all packages from root.
  2. Compile, deploy, and generate an ABI from the Solidity contract.
  3. Start the desired frontend template from root

Requirements

Build a universal SDK package (fhevm-sdk) that:

• Can be imported into any dApp.
• Provides utilities for initialization, encrypted inputs, and decryption flows (userDecrypt with EIP-712 signing + publicDecrypt).
• Exposes a wagmi-like modular API structure (hooks/adapters for React, but keep the core independent).
• Makes reusable components that cover different encryption/decryption scenarios.

Keep it clean, reusable, and extensible.

Not planning to participate? You can still share suggestions on the GitHub issue board.

Bonus points (Optional):

These are not necessary for winning. Please make sure you really focus on the fhevm-sdk structure first.

• Show the SDK working in multiple environments (e.g., Vue, plain Node.js, Next.js).
• Provide clear documentation and code samples for quick setup.
• Include developer-friendly command lines that minimize setup time (<10 lines of code to get started).

Judging criteria

Submissions will be judged on:

• Usability: How easy is it for a developer to install and use the SDK (quick setup, minimal boilerplate)?
• Completeness: Does it cover the full flow of FHEVM usage; initialization, encrypted inputs, decryption, and contract interactions?
• Reusability: Are components and utilities clean, modular, and adaptable across different frameworks (React, Vue, Node.js)?
• Documentation & Clarity: Is the SDK well-documented with clear examples, making onboarding straightforward for new developers?
• Creativity: Extra points if the SDK is showcased in multiple environments or in innovative use cases that highlight FHEVM’s potential.

Deliverables

• GitHub repo with the updated universal FHEVM SDK.
• Example template(s) showing integration (Next.js showcase required, others optional).
• Video walkthrough showcasing setup and design choices.
• Deployment link (or links in the case of multiple templates) linked in the README file

Rewards

• 🥇 1st place: $5,000
• 🥈 2nd place: $3,000
• 🥉 3rd place: $2,000

Besides the monetary reward, the best SDK submission will also has the chance be merged into the main branch of Zama's official fhevm-react-template to be used by thousands of developers.

How to participate?

Connect your wallet to the Zama Guild and register from here. 

Additional links

• Zama Developer Program on Guild
• Zama  Community Forum for developer support
• Zama Discord server‍
• Zama on X
• Zama on Telegram