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LP Position Notifications Implementation Summary

Overview

Successfully implemented LP position notifications for funded invoice state changes and due date monitoring. The system now sends both in-app toast notifications and persistent notifications stored in a notification center.

What Was Implemented

1. Enhanced NotificationContext

  • Location: src/context/NotificationContext.tsx
  • Manages a list of notifications with full read/unread state
  • Stores up to 20 most recent notifications in localStorage
  • Provides methods: addNotification(), markAsRead(), markAllAsRead()
  • Notification types: "funded" | "settled" | "expired" | "disputed" | "info" | "warning"

2. LP Position Polling Hook

  • Location: src/hooks/usePositionPolling.ts
  • Triggers notifications on invoice state transitions:
    • Funded → Paid: Success toast + notification "Invoice #X paid - You earned Y USDC"
    • Funded → Defaulted: Error toast + notification "Invoice #X expired"
    • Funded → Cancelled: Error toast + notification "Invoice #X disputed"
    • Due date expiry: Detects when funded invoice's due date has passed
  • Polls every 60 seconds
  • Only tracks invoices funded by the connected wallet address
  • Yields formatted as USDC in notifications

3. Notification Bell Component

  • Location: src/components/NotificationBell.tsx
  • Fixed position bell icon in top navbar
  • Displays unread badge with count
  • Polls external API (/api/notifications/[address]) every 60 seconds
  • Merges external and local notifications
  • Sorted by most recent first
  • Opens notification drawer when clicked

4. Notification Drawer/Center

  • Location: src/components/NotificationDrawer.tsx
  • Displays last 20 notifications with timestamps
  • Click individual notification to mark as read
  • "Mark all as read" button
  • Color-coded by notification type (red for expired/disputed, blue for settled, etc.)
  • Empty state when no notifications
  • Dark mode support

5. LPDashboard Integration

  • Location: src/components/LPDashboard.tsx
  • Integrated usePositionPolling hook to monitor funded invoices
  • Passes required callbacks (addToast, addNotification)
  • Continuously monitors for state changes while LP is viewing dashboard

6. Test Coverage

  • Location: __tests__/usePositionPolling.test.ts
  • Tests all notification triggers and state transitions
  • Validates address filtering
  • Tests null/undefined handling
  • Verifies one-time expiry notifications

Architecture Flow

LP Views Dashboard
    ↓
LPDashboard Component Loads
    ↓
usePositionPolling Hook Starts
    ├─ Monitors all funded invoices by current address
    ├─ Polls every 60 seconds
    └─ Compares previous states with current states
        ├─ Funded → Paid? → addToast("success") + addNotification("settled")
        ├─ Funded → Defaulted? → addToast("error") + addNotification("expired")
        ├─ Funded → Cancelled? → addToast("error") + addNotification("disputed")
        └─ Due date passed? → addToast("error") + addNotification("expired")
    ↓
Toast Displays (auto-dismisses in 6s)
    ↓
Notification Saved to Context
    ├─ Stored in memory
    └─ Persisted to localStorage
    ↓
Bell Icon Updates
    ├─ Unread count badge
    └─ User can click to view notification center

External API Notifications
    ├─ Polled every 60 seconds
    ├─ Merged with local notifications
    └─ Deduped by ID

Files Changed

File Type Changes
src/context/NotificationContext.tsx Modified Enhanced with notification items, read state, localStorage persistence
src/components/NotificationBell.tsx Modified Refactored to use context, merge external notifications
src/components/NotificationDrawer.tsx Modified Refactored to use context, improved UI
src/components/LPDashboard.tsx Modified Added usePositionPolling hook integration
src/hooks/usePositionPolling.ts New Position polling and notification logic
__tests__/usePositionPolling.test.ts New Test coverage for polling hook

Notification Types

  1. Settled (Blue): Invoice paid successfully
  2. Expired (Red): Invoice defaulted or due date passed
  3. Disputed (Orange): Invoice cancelled/disputed
  4. Success/Error Toast: Immediate feedback on state changes

User Experience

  1. LP funds an invoice → Added to monitoring list
  2. Payer pays the invoice → Toast appears "Invoice #X paid" + Notification
  3. LP clicks bell icon → Notification drawer opens showing last 20 events
  4. LP clicks notification → Marked as read (visual change)
  5. Due date passes → One-time expiry notification sent
  6. Page refresh → Notifications persist from localStorage

Testing

Run tests with:

npm test usePositionPolling.test.ts

Tests verify:

  • ✅ Paid notification triggers correctly
  • ✅ Defaulted notification triggers correctly
  • ✅ Disputed notification triggers correctly
  • ✅ Due date expiry notification fires once
  • ✅ Only notifies for LP's own funded invoices
  • ✅ No notifications when address is null

Payer Email Reminders Implementation Summary

Overview

Implemented an opt-in email reminder system for payers using Resend and Supabase. Payers can now subscribe to receive email notifications 72 hours and 24 hours before their outstanding invoices are due.

What Was Implemented

1. Email Template

  • Location: src/emails/PaymentReminder.tsx
  • Built with react-email
  • Includes invoice ID, amount, token, due date, and deep links to the payer dashboard and "Pay Now" page.

2. Reminders API Route

  • Location: app/api/reminders/route.ts
  • POST: Saves or updates payer email preferences in Supabase.
  • GET: Background job logic (secured by CRON_SECRET) that:
    1. Fetches all active reminder preferences.
    2. Identifies funded invoices due in 72h or 24h.
    3. Sends emails via Resend SDK for each milestone once.
    4. Tracks sent emails in a sent_reminders table to prevent duplicates.

3. Unsubscribe Route

  • Location: app/api/reminders/unsubscribe/route.ts
  • Simple GET handler to disable reminders for a given address.

4. Payer Dashboard UI

  • Location: src/components/payer/PayerReminderOptIn.tsx
  • A modern opt-in form integrated into the Payer Dashboard.
  • Allows users to enter their email and toggle reminders on/off.

5. Database Integration (Supabase)

  • Location: src/lib/supabase.ts
  • Configured Supabase client for persistence.
  • Requires two tables: reminder_preferences and sent_reminders.

6. API Testing

  • Location: __tests__/reminders.test.ts
  • Full test coverage for the API route with mocked Resend SDK and Supabase client.
  • Verifies opt-in saving, milestone detection, and duplicate prevention.

Setup Instructions

  1. Environment Variables:

    • RESEND_API_KEY: API key from resend.com
    • NEXT_PUBLIC_SUPABASE_URL & NEXT_PUBLIC_SUPABASE_ANON_KEY: Supabase credentials.
    • SUPABASE_SERVICE_ROLE_KEY: Required for the background cron job to bypass RLS.
    • CRON_SECRET: Secret token for securing the trigger endpoint.

  2. Cron Job:

    • Set up a periodic job (e.g., via Vercel Cron or GitHub Actions) to call GET /api/reminders with the Authorization: Bearer <CRON_SECRET> header.

No Breaking Changes

  • All existing functionality preserved
  • Providers already in place (app/layout.tsx)
  • Backward compatible with existing notification API
  • No modifications to invoice contract/types