[feat] add "invite a friend" #209
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islandbitcoin
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brh28
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Sep 11, 2025
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only about 10% through so far
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putting this back to draft mode to make changes based on feedback, and wait for twilio to approve messaging so I can test end-to-end |
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much cleaner PR, ready for another review |
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@brh28 please review |
Add comprehensive invite-friend feature allowing users to invite friends via Email, SMS, or WhatsApp. **User-Facing Features:** - Create invites: Users can send invites via Email (SendGrid), SMS, or WhatsApp (Twilio) - Redeem invites: New users can redeem invites within 1 hour of account creation - Preview invites: Unauthenticated endpoint to preview invite before registration - Rate limiting: 10 invites/day per user, 3 invites/day per target contact (Redis-based) - 24-hour invite expiration with Firebase Dynamic Links support **Admin Features:** - View invite details with inviter/redeemer information - List and filter invites by status and inviter - Paginated invite queries **Technical Implementation:** - MongoDB schema for invite tracking with secure token hashing (SHA-256) - Notification service supporting Email, SMS, and WhatsApp - Contact validation for email/phone formats - Deep linking support via Firebase Dynamic Links - Comprehensive test coverage (unit & integration tests) **Security:** - Tokens are 40-character random strings with only SHA-256 hash stored - Contact verification ensures invite sent to correct recipient - Account age validation (< 1 hour) for new user redemption - Self-redemption prevention
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