QVAC PayGuard
Local-first AI payment protection before wallet signature
Key message: Private payment context stays on-device. QVAC checks intent before Solana signs.
Stablecoin payments are blind at signing time
This shows how wallets can miss the payment context that matters most.
  • Wallets show transaction data, not payment intent
  • Invoices, screenshots, vendor history, and scam context are ignored
  • Users can send irreversible payments to spoofed or changed wallets
  • Cloud AI is risky because payment documents are sensitive
QVAC-powered pre-sign payment review
  • Local QVAC OCR reads invoices and screenshots
  • Local RAG compares against trusted recipients and payment history
  • Local LLM explains risk as Safe, Review, or Block
  • PayGuard routes payments to Direct Send, Guarded Payment, or Block
From payment request to safer settlement
Here’s how QVAC PayGuard ensures a secure and informed payment process:
Enter Payment Details
User enters recipient, amount, token, and uploads invoice.
QVAC Local Analysis
QVAC analyzes document and local recipient history.
PayGuard Verdict
PayGuard shows verdict and reasons.
Action Payment
User signs direct transfer or uses guarded escrow.
Local Confirmation
Receipt and history are stored locally.
QVAC is essential, not decorative
Key winning points:
On-device AI preserves privacy for invoices and payment history
AI decision changes real payment behavior before signing
Built for stablecoin users: merchants, freelancers, and operators
Real Solana devnet flow with direct transfers and guarded escrow
Clear demo: Safe payment, Block scam, Guarded first-time recipient
Closing line: PayGuard turns QVAC into a practical safety layer for everyday stablecoin payments.
Made with