Chayn

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  Tree view of the original post and all its reposts.

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  Tree view of a repost with all its parents back to the original post.

Inspiration

Every viral trend starts with a spark, but today only the final uploader benefits. The originators and remixers who carried the trend get nothing. We wanted to fix this unfair system and create a way to reward every link in the chain of creativity. That’s how Chayn was born.

What it does

Chayn links every repost, stitch, duet, or remix back to its parent post. When a fan or brand pays into a trend, Chayn traces the chain back to the origin. The root creator receives 70%, while the remaining 30% is divided among the rest of the chain. This turns trends into transparent, community-driven economies where every contribution is recognized.

How we built it

We built Chayn as a web app with a Next.js frontend and a Node.js backend powered by the Supabase JavaScript client.

• Frontend: Next.js with React Query to fetch chains, purchases, and receipts from our API routes.
• Backend: Node.js server using Supabase’s JS SDK to handle all database operations. Each post record stores a parent_post_id.
• Split logic: The backend then applies the 70/30 algorithm — 70% to the root, 30% split evenly among all other users in the chain.

Challenges we ran into

• Traversing chains recursively through Supabase’s API without writing stored procedures
• Getting the 70/30 split math correct for chains of different lengths
• Making sure allocations round correctly to the cent
• Coordinating Supabase auth with purchases and allocations

Accomplishments that we're proud of

• Built a working demo with Supabase JS client as our single source of truth
• Implemented a simple but fair 70/30 revenue-sharing model
• Made a transparent receipt flow so anyone can see where their money went
• Shipped a clean frontend that visualizes repost chains

What we learned

• How to structure parent-child relationships with Supabase tables and query them via the JS client
• How to implement recursive lookups in SQL functions
• The importance of balancing simplicity with fairness in revenue sharing

What's next for Chayn

• Add Supabase Row Level Security policies so only creators can edit their posts
• Connect Stripe payouts directly to creator accounts
• Optimize chain traversal with caching or pre-computed roots
• Build a browser extension to auto-capture repost relationships from TikTok

Built With

• css
• docker
• next.js
• node.js
• supabase
• tailwind