🔒 PrivateInfer

Confidential AI Inference Marketplace — Powered by Midnight Blockchain's Zero-Knowledge Proofs.

Important

Network Notice: This application and its smart contracts are deployed on the Midnight PREPROD Network. Connect with the 1AM Wallet (mn_shield browser extension) set to the preprod network. Lace Wallet is not currently supported.

🔗 Important Links

Live Demo: https://private-infer.vercel.app/
Product Pitch Deck: PrivateInfer Product Pitch
Product X (Twitter): https://x.com/private_infer
Demo Video: https://youtu.be/w2uHJ5s_E6I

📚 Documentation

Document	Description
SETUP.md	Local development setup guide
USAGE.md	Application usage instructions
PROPOSAL.md	PrivateInfer architecture proposal
docs/ARCHITECTURE.md	Full system architecture — contracts, API, DB schema, ZK flows
docs/USERS.md	Verified beta tester directory (70 participants)
FEEDBACK.md	Beta tester raw feedback + implemented changes

💡 About the Product

❌ The Problem

Industries dealing with sensitive data (Healthcare, Finance, Legal) cannot safely send it to public AI models. Doing so exposes confidential data, violates compliance laws (HIPAA), and destroys user trust.

✅ The Solution

PrivateInfer provides a trustless marketplace for secure, off-chain AI inference on the Midnight blockchain:

Encrypted Inputs: The Query Maker submits sensitive, encrypted data — only a commitment hash ever touches the chain.
Secure Processing: A decentralized AI Provider Node processes the data off-chain via Groq-powered inference inside a secure environment.
Zero-Knowledge Proofs: The Provider submits a ZK-proof to the Midnight smart contract, mathematically guaranteeing the AI ran correctly — without revealing the data or result on the public ledger.
Trustless Escrow: The smart contract automatically releases tDUST payment only after the proof is verified on-chain.

🛡️ Privacy Model — Public vs. Private

	Public State (On-Chain)	Private Witness (Off-Chain)
Query	SHA-256 commitment hash only	Actual query text — never leaves client
Result	SHA-256 proof hash only	Decrypted AI response — stored in encrypted DB
Identity	Opaque public key bytes	Caller identity verified via ZK `disclose()` — not exposed
Escrow	tDUST balance visible	Transfer amount derived from on-chain state

🆕 Recent Updates (September 2026)

UI / UX Overhaul

Full Product Landing Page — Hero section, animated terminal widget, stats bar (70+ Beta Testers, 100% ZK Verified), How It Works (3-step flow), 6-card features grid, Provider CTA section, FAQ accordion, and a complete footer with nav links and copyright. Commit 94c8b69
Admin Ops Dashboard — Replaced the single deploy button with a full 4-tab monitoring dashboard: Live Stats, Queries table (color-coded status badges), Providers table, and a Contract Deploy tab with Midnight SDK. Commit 94c8b69
Real Wallet Connect Button — Header "Connect Wallet" now directly calls the wallet SDK (was previously just a navigation link). Shows connected address with live green pulse dot + disconnect button. Commit 54acd1b
Theme Toggle Fixed — Light/dark mode now works correctly. Split CSS into proper :root (light) and html.dark (dark) blocks; fixed Tailwind v4 @custom-variant dark selector for next-themes compatibility. Commit 94c8b69
Logo Displayed — public/logo.png now shown in both the header and footer (was previously a generic icon).

Beta Tester Feedback Fixes

Copy Button — Added one-click copy to the decrypted AI result output on /query/[id]. Commit 54acd1b
Processing Spinner — Query submission page now shows an animated spinner and "Please do not refresh" message during ZK proof generation. Commit 89416df
Explorer Warning Banner — The 1AM Explorer hint is now a prominent red 🚨 ATTENTION banner so users don't miss it. Commit 89416df
Non-1AM Wallet Toast — When Lace Wallet or wrong network is detected, a toast notification now explains PREPROD-only support. Commit 54acd1b

📸 Product Screenshots

1. Landing Page	2. Creating a Secure Query

3. Query Deployed Successfully	4. AI Provider Dashboard

5. Secure AI Result & Payment Release

📜 Smart Contracts

Our Compact smart contract manages escrow lifecycle, enforces state transitions, and verifies ZK proofs for AI inference.

Deployed Contract Address (Midnight PREPROD):

c3e5cfedf63b54f2004755385a3ac638301c56d66b90002b883224c424222bae

View on 1AM Explorer ↗

🔗 Sample PREPROD Transactions

Circuit	Transaction
🟢 Create Query	`516b7b87...`
🟡 Submit Result & Proof	`c7dfa24e...`
🔵 Release Payment	`8ab94e92...`

Contract Deployment Visuals

1. Contract Circuits

2. Successful Deployment

🏗️ Architecture

For the full technical architecture, see docs/ARCHITECTURE.md.

High-Level Diagram

graph TD
    UI[Next.js Client UI] -->|Connects via| Wallet[1AM Wallet - mn_shield]
    UI -->|Polls Metadata| DB[(Neon PostgreSQL)]
    Wallet -->|Submits ZK Proofs| Midnight[Midnight PREPROD Network]
    Midnight -->|Verifies Proofs| SC[Compact Smart Contract]
    ProviderNode[AI Provider Node] -->|Reads Queue| Redis[(Upstash Redis)]
    ProviderNode -->|Calls Groq API| Groq[Groq LLM]
    ProviderNode -->|Stores Result| DB
    ProviderNode -->|Submits ZKP| Midnight

User Workflow

sequenceDiagram
    participant U as User (Query Maker)
    participant SC as Midnight Smart Contract
    participant P as AI Provider

    U->>SC: 1. Deploy Query (Lock tDUST, Commit Hash)
    SC-->>P: 2. Provider picks up job via Redis
    P->>P: 3. Run AI Inference (Groq API)
    P->>SC: 4. Submit ZK Proof & Result Hash
    SC->>SC: 5. Verify Proof → RESULT_READY
    U->>SC: 6. Verify Result & Release Payment
    SC-->>P: 7. Transfer tDUST Escrow

📂 File Structure

PrivateInfer/
├── contracts/                  # Midnight Compact Smart Contracts
│   ├── privateinfer.compact    # Core ZK verification & escrow logic
│   └── managed/                # Compiled TS/WASM outputs
├── docs/                       # Documentation
│   ├── ARCHITECTURE.md         # Full system architecture
│   └── USERS.md                # Verified beta testers directory (70 wallets)
├── prisma/                     # Database
│   └── schema.prisma           # PostgreSQL models (Query, Provider, Result)
├── scripts/
│   └── worker.ts               # Off-chain AI inference worker (Groq)
├── src/
│   ├── app/
│   │   ├── page.tsx            # Landing page (hero, FAQ, footer)
│   │   ├── admin/page.tsx      # Admin ops dashboard (4 tabs)
│   │   ├── history/page.tsx    # Query history for connected wallet ← NEW
│   │   ├── query/new/          # Query submission UI
│   │   ├── query/[id]/         # Query status + ZK result UI
│   │   ├── provider/           # AI Provider dashboard
│   │   └── api/                # REST API routes
│   ├── components/
│   │   └── Header.tsx          # Sticky header with wallet connect + nav
│   ├── contexts/
│   │   └── WalletContext.tsx   # Wallet state management
│   └── lib/                    # Shared utilities (DB, Redis, crypto)
├── public/
│   ├── logo.png                # PrivateInfer logo
│   └── zk/privateinfer/        # Compiled ZK proving/verifying keys
├── FEEDBACK.md                 # Beta tester feedback + implemented changelog
├── SETUP.md                    # Local development setup
└── .github/workflows/          # CI/CD (Typecheck, Frontend, Contracts)

🧪 Testing

Jest unit tests cover core cryptographic logic — including the coinPublicKeyToBytes conversion that transforms 1AM Wallet public keys into Uint8Array buffers for use in ZK circuits.

npm install
npm test

# TypeScript check
npm run typecheck

# Production build
npm run build

📝 User Feedback & Beta Testing

70 verified beta testers participated across the Midnight PREPROD testing phase (September 12–22, 2026), recruited via Discord and Telegram. All testers used the 1AM Wallet on the Midnight PREPROD network. Each wallet address is verifiable on the 1AM Explorer.

Resource	Description	Link
Feedback Form	Google Form used to collect structured tester feedback during the beta	forms.gle/nYS9vPbCfWTQgKk56
Response Sheet	All 70 raw form responses with ratings, comments, timestamps, and wallet addresses	Google Sheets ↗
Verified Testers	Full directory of 70 testers — name, PREPROD wallet address, and 1AM Explorer verification link for each	docs/USERS.md
Feedback Changelog	Raw tester feedback with real wallet addresses + every implemented change linked to its git commit ID	FEEDBACK.md

Changes Shipped Directly from Beta Feedback

Feedback	From	Commit
Added copy button to AI result output	Manash Koley	`e3a4a9c`
Processing spinner + "do not refresh" message	Rubina Mondal	`e3a4a9c`
Explorer hint redesigned as red `🚨 ATTENTION` banner	Faisal Islam	`e3a4a9c`
Light/dark theme toggle fully fixed	Habibullah Mir	`94c8b69`
Connect Wallet button actually connects (was just a link)	Multiple testers	`54acd1b`
Lace Wallet error toast with PREPROD-only guidance	Priya Das	`54acd1b`
Query history page `/history`	Fatima Khatun	`659cc93`

🚀 Future Roadmap

Feature	Status
Query history page (`/history`)	✅ Shipped
Auto-submit script for provider nodes	⏳ Planned
AI model selection dropdown (Medical / Legal / General)	⏳ Planned
Lace Wallet full support	⏳ Planned
On-chain provider reputation / staking	🔭 Research
Dynamic ZK-VM for full LLM execution trace	🔭 Research
Multiparty Computation (MPC) inference	🔭 Research

🙏 Salutation

A massive thank you to the Midnight Network team! The ability to seamlessly blend public state verification with private local execution using Compact is game-changing. This platform allowed us to build an enterprise-grade privacy product that would be completely impossible on traditional blockchains. Thank you for building the future of data protection! 💜

Name		Name	Last commit message	Last commit date
.github/workflows		.github/workflows
assets		assets
contracts		contracts
docs		docs
prisma		prisma
public		public
scripts		scripts
src		src
.eslintrc.json		.eslintrc.json
.gitignore		.gitignore
FEEDBACK.md		FEEDBACK.md
PROPOSAL.md		PROPOSAL.md
README.md		README.md
SETUP.md		SETUP.md
USAGE.md		USAGE.md
components.json		components.json
eslint.config.mjs		eslint.config.mjs
jest.config.js		jest.config.js
next.config.mjs		next.config.mjs
next.config.ts		next.config.ts
package-lock.json		package-lock.json
package.json		package.json
postcss.config.mjs		postcss.config.mjs
tsconfig.json		tsconfig.json

Navigation Menu

Repository files navigation

🔒 PrivateInfer

🔗 Important Links

📚 Documentation

💡 About the Product

❌ The Problem

✅ The Solution

🛡️ Privacy Model — Public vs. Private

🆕 Recent Updates (September 2026)

UI / UX Overhaul

Beta Tester Feedback Fixes

📸 Product Screenshots

📜 Smart Contracts

🔗 Sample PREPROD Transactions

Contract Deployment Visuals

1. Contract Circuits

2. Successful Deployment

🏗️ Architecture

High-Level Diagram

User Workflow

📂 File Structure

🧪 Testing

📝 User Feedback & Beta Testing

Changes Shipped Directly from Beta Feedback

🚀 Future Roadmap

🙏 Salutation

About

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🔒 PrivateInfer

🔗 Important Links

📚 Documentation

💡 About the Product

❌ The Problem

✅ The Solution

🛡️ Privacy Model — Public vs. Private

🆕 Recent Updates (September 2026)

UI / UX Overhaul

Beta Tester Feedback Fixes

📸 Product Screenshots

📜 Smart Contracts

🔗 Sample PREPROD Transactions

Contract Deployment Visuals

1. Contract Circuits

2. Successful Deployment

🏗️ Architecture

High-Level Diagram

User Workflow

📂 File Structure

🧪 Testing

📝 User Feedback & Beta Testing

Changes Shipped Directly from Beta Feedback

🚀 Future Roadmap

🙏 Salutation

About

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