As the web3 paradigm shift continues to reshape the digital landscape, developers are increasingly tasked with building more engaging, transparent, and user-driven decentralized applications. One of the most effective ways to achieve this is by integrating a feedback form into your dapp—a simple yet powerful tool that enables real-time, scalable user insights while reinforcing trust and community involvement.
From DAO governance decisions to post-event sentiment analysis, feedback forms serve as a bridge between developers and users. They democratize input, support data-driven improvements, and align closely with web3’s core principles of decentralization and transparency.
This guide walks you through how to seamlessly integrate a blockchain-based feedback form into your dapp using an open-source solution called Form xChange, deployed on Linea with MetaMask SDK integration for smooth wallet connectivity.
👉 Discover how to boost user engagement in your dapp with seamless wallet integration.
What Is Form xChange and How Does It Work?
Form xChange is an open-source, blockchain-powered feedback collection tool designed specifically for web3 applications. Built using Next.js and Solidity, it leverages smart contracts to enable secure, anonymous user responses and transparent result tracking—hallmarks of trustless systems.
Although currently deployed on Linea, Form xChange’s modular architecture supports deployment across any EVM-compatible blockchain, making it highly flexible for diverse use cases.
The system operates using two core smart contracts:
- FeedbackForm Contract: Manages individual feedback forms, including question logic, response collection, and scoring.
- FeedbackFormFactory Contract: Deploys new instances of FeedbackForm whenever a creator launches a new survey.
All interactions occur through a decentralized interface where users connect via their MetaMask wallets, ensuring identity verification without compromising anonymity during voting or feedback submission.
Key Roles in Form xChange
Form Author
- Create custom feedback forms with multiple questions.
- View aggregated response data, including average scores per section.
- Monitor real-time results with full transparency.
Participant
- Submit anonymous responses to live forms or proposals.
- Access final results after submission, promoting openness.
- Interact securely via wallet-based authentication.
This role-based structure ensures accountability while preserving privacy—a critical balance in decentralized environments.
How to Integrate a Feedback Form Into Your Dapp
While you can use the public instance of Form xChange, hosting your own backend gives you greater control over branding, data ownership, and user experience. Below is a step-by-step walkthrough to deploy your own version.
Step 1: Clone the Form xChange Backend
Ensure you have Node.js v16+ and Truffle installed before proceeding.
Clone the repository:
git clone https://github.com/Consensys/Form-XChange.gitNavigate to the contract directory:
cd Form-XChange/packages/form-XChangeCompile the smart contracts:
truffle compileRun tests to verify integrity:
truffle test
These steps prepare the development environment and confirm that all contracts function as intended.
Step 2: Deploy to Linea Blockchain
Why choose Linea? As a Type 2 zkEVM rollup, Linea replicates Ethereum’s execution environment with enhanced scalability and lower gas fees. It offers:
- Faster transaction finality
- Native MetaMask support
- Full compatibility with Ethereum tooling (like Truffle)
- High throughput for frequent interactions like feedback submissions
This makes Linea an ideal network for deploying interactive dapps like Form xChange.
Deployment Steps
Launch the Truffle dashboard:
truffle dashboard- Open
http://localhost:24012in your browser and connect your MetaMask wallet. Switch the network to Linea from the dropdown menu. In a new terminal, run the migration command:
truffle migrate --network dashboard- Return to the browser tab and confirm the deployment transaction in MetaMask.
Once confirmed, the terminal will display the newly deployed contract address. You can verify deployment success by searching this address on the Linea Block Explorer.
You now have a fully functional, self-hosted feedback system running on a secure, scalable Layer 2 network.
👉 Learn how to deploy your own scalable dapp backend with integrated wallet support.
Seamless Wallet Integration Using MetaMask SDK
User experience is crucial in web3 adoption. Even the most powerful dapp fails if users struggle to connect their wallets.
The MetaMask SDK simplifies integration by enabling seamless wallet connections across platforms—including web, mobile, and gaming environments—using just a few lines of code.
Here’s how to integrate it into a React-based frontend:
Install the SDK via npm or yarn:
npm install @metamask/sdkImport into your project:
import { MetaMaskSDK } from '@metamask/sdk';Initialize the SDK with desired options:
const sdk = new MetaMaskSDK(options); sdk.getProvider();Trigger wallet connection anywhere in your app:
window.ethereum.request({ method: 'eth_requestAccounts', params: [] });
Calling eth_requestAccounts prompts the user to connect or install MetaMask—always initiate this first to ensure smooth onboarding.The MetaMask SDK automatically detects Linea and other EVM chains, reducing configuration overhead and improving cross-chain usability.
Why Use Form xChange in Your Web3 Project?
Integrating Form xChange into your dapp unlocks several strategic advantages:
- Decentralized Decision-Making: Empower DAO members or token holders to vote on proposals anonymously.
- Real-Time UX Insights: Gather actionable feedback after feature releases or events.
- Transparent Results: All data is verifiable on-chain, reinforcing trust.
- Scalable Architecture: Deploy once, reuse across multiple forms and communities.
- Cross-Chain Flexibility: Easily port to other EVM networks like Polygon, Arbitrum, or Optimism.
Whether you're improving user experience, running internal team surveys, or managing governance votes, Form xChange turns passive users into active participants.
Frequently Asked Questions (FAQ)
Q: Can users remain anonymous when submitting feedback?
A: Yes. While users must connect their wallet to authenticate, their responses are cryptographically anonymized. Only aggregated results are visible on-chain.
Q: Is Form xChange limited to Linea only?
A: No. Though deployed on Linea by default, the contracts can be deployed on any EVM-compatible chain such as Ethereum, Polygon, or BNB Smart Chain.
Q: How do I customize the look and feel of the form?
A: Since the frontend is built with Next.js, you can fork the repository and modify UI components freely to match your brand or dapp theme.
Q: Are there gas costs involved for users submitting feedback?
A: Gas fees apply only to form creation and deployment (paid by the author). Participants typically interact via view functions or low-cost transactions, minimizing burden.
Q: Can I export the collected data for off-chain analysis?
A: Yes. All responses are stored on-chain and can be queried via APIs or exported programmatically for deeper analytics.
Q: Is the source code publicly audited?
A: As an open-source project developed by Consensys, Form xChange encourages community review and contributions. Always audit contracts before production use.
👉 Start building a user-centric dapp with secure, scalable infrastructure today.
Final Thoughts
Integrating a feedback form into your dapp isn't just about collecting opinions—it's about fostering community, enabling transparency, and driving iterative improvement in line with web3 values.
With tools like Form xChange, Linea, and the MetaMask SDK, developers now have everything needed to build engaging, decentralized feedback loops quickly and securely.
By combining scalable infrastructure with seamless user experiences, you position your dapp not just as a product—but as a living ecosystem shaped by its users.
Never underestimate the power of listening. In web3, every voice counts.