SealEncrypt

SealEncrypt is a decentralized encrypted document storage and permission based sharing platform, where users can give access to a file or revoke access using simple signatures with simplified usernames.

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🌐 Deployment Links

• Smart Contract (Sepolia): View on Etherscan ↗
• Web App: Seal Encrypt ↗
• Envio Indexer: Envio indexer ↗

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🛠 Tech Stack

• Frontend: Next.js, Tailwind CSS, Framer Motion
• Smart Contracts: Sepolia (using Hardhat)
• Storage: IPFS (encrypted via Lighthouse sdk)
• Utilities: Wagmi, Viem, RainbowKit for wallet and contract interactions
• Indexer: Envio for real-time blockchain data indexing
• Free LLMs Usage of free llms to make the frontend like Chatgpt, Claude, and Gemini Flash

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🚀 Getting Started

Build and Test Smart Contracts

npm install
npx hardhat build
npx hardhat test

Store private key securely and deploy Smart Contracts

npx hardhat keystore set SEPOLIA_PRIVATE_KEY
npx hardhat ignition deploy --network sepolia ignition/modules/SealEncrypt.ts

Update etherscan api key in .env.example and verify Smart Contracts

mv .env.example .env
npx hardhat verify --network sepolia <CONTRACT_ADDRESS>

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Run the envio indexer locally

cd envio-indexer
npm install
npm run dev

once done close the envio indexer using npx envio stop

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Update the .env.example with variable and install dependencies for frontend

mv .env.example .env
cd web
npm install
npm run dev

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🏗️ Architecture Overview

• Client-Side Encryption & IPFS: Files are encrypted directly on the client device before being uploaded to IPFS, ensuring that only the owner retains control over the data.

• Share & Revoke Access (Username-Based): Documents can be securely shared using usernames as well as wallet addresses, simplifying access control. Users can grant or revoke access at any time with a simple signature.

• Signature-Based Decryption: Only the document owner or authorized recipients can decrypt files using their on-chain wallet signature, maintaining complete end-to-end security.

• Real-Time Monitoring via Envio Indexer: The Envio Indexer tracks on-chain events, providing live updates for actions like uploads, shares, and revocations directly within the app.

• Scalable Storage Model (Future Update): Planned integration of a pay-per-storage model — for example, $1 USDC per 10 GB of encrypted data per user — enabling sustainable and decentralized data management.

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Pages Overview

• 🏠 Home (/) The landing page introducing SealEncrypt - featuring a hero section, animations, and a quick overview of the platform’s core features.

• 📊 Dashboard (/dashboard) Displays the user’s documents, status badges, and quick actions. Includes username creation and update functionality with synced user data.

• 📤 Upload (/upload) Allows users to upload files with client-side encryption before storing metadata on-chain via smart contracts.

• 📁 Your SealEncrypts (/documents) Lists all user documents with detailed file metadata — including CID, share/revoke access controls, and decryption options.

• 🔐 Decrypt (/decrypt) Enables users or authorized recipients (with granted access) to decrypt documents using their wallet signature.

• 🧾 Transaction Logs (/tx-logs) Displays recent on-chain transactions and activity data fetched in real-time through the Envio Indexer.

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🧾 License

This project is licensed under the MIT License — see the LICENSE file for details.