Update README.md

README.md

@@ -1,39 +1,68 @@
+---
+title: Invoice-Flow AI
+emoji: 📄
+colorFrom: blue
+colorTo: purple
+sdk: streamlit
+sdk_version: "1.31.1"
+app_file: app.py
+pinned: false
+---
+
 # Invoice-Flow AI
 
-Agentic invoice verification and on-chain trust registry for MSME finance.
+**Agentic invoice verification & on-chain trust registry**
 
-## 🚀 Overview
-Invoice-Flow AI automates invoice verification using:
+Invoice-Flow AI is a hackathon prototype that automates invoice verification using:
 - Multimodal AI (Gemini 1.5 Flash)
 - Human-in-the-loop buyer consent
 - Blockchain-based replay protection
 
-The system prevents invoice fraud and double-financing while reducing verification cost from ₹500+ to under ₹5 per invoice.
+The system prevents invoice fraud and double-financing while reducing verification costs from ₹500+ to under ₹5 per invoice.
+
+---
+
+## 🚀 Demo Flow
+
+1. Upload an invoice PDF  
+2. AI extracts structured data  
+3. Buyer approval (simulated UI)  
+4. Verified receipt minted on Polygon  
+5. Transaction visible on PolygonScan  
+
+---
+
+## 🧠 Architecture Overview
+
+- **AI Layer:** Gemini 1.5 Flash (PDF → JSON)
+- **Consent Layer:** Buyer approval UI (Webhook-ready)
+- **Settlement Layer:** Polygon Amoy (EVM-compatible)
+- **Security:** SHA-256 hashing for replay protection
 
-## 🧠 Architecture
-- **AI Perception:** Gemini 1.5 Flash extracts structured data from PDFs
-- **Consent Layer:** Buyer approval (simulated in demo)
-- **Settlement Layer:** Polygon smart contract enforces finality
+---
 
 ## 🛠 Tech Stack
-- Streamlit (Prototype UI)
+
+- Streamlit
 - Google Gemini 1.5 Flash
 - Web3.py
 - Polygon Amoy Testnet
 
+---
+
 ## 🔐 Secrets Required (Hugging Face)
-Add these in **HF → Settings → Variables**:
+
+Add the following in **Settings → Variables**:
+
 - `GEMINI_API_KEY`
 - `RPC_URL`
 - `PRIVATE_KEY`
 
-## 🧪 Demo Flow
-1. Upload invoice PDF
-2. Analyze with AI
-3. Buyer approves
-4. Mint receipt on-chain
-5. View transaction on PolygonScan
+⚠️ Do NOT commit secrets to the repository.
+
+---
 
 ## ⚠️ Disclaimer
+
 This is a hackathon prototype.  
-Production deployment would replace UI consent with secure webhooks and signatures.
+Production deployments would replace UI consent with secure webhooks and cryptographic buyer signatures.