A real-time credit card fraud detection web app built with React, Hono, and SQLite on Val Town.

Deployed on Val Town — see the endpoint URL in the val's HTTP file.

Rendering mermaid diagram...

Rule	Risk Points
Amount > $5,000	+35
Amount > $2,000	+20
International transaction	+25
Late-night / midnight hours	+20
High-risk category (crypto, gambling, wire)	+25
Online + international combo	+15

Score	Status	Action
0–39	✅ Approved	Proceeds normally
40–69	⚠️ Flagged	Requires manual review
70–100	🚫 Blocked	Automatically blocked

main.ts              ← Hono HTTP server + fraud detection logic + SQLite
frontend/
  index.html         ← HTML entry point
  index.tsx          ← React entry point
  style.css          ← Dark theme UI styles
  components/
    App.tsx          ← Full React app (form, stats, table, charts)
README.md

• Backend: Hono (TypeScript)
• Frontend: React 18 (client-side)
• Database: Val Town SQLite (std/sqlite)
• Runtime: Deno on Val Town