Traditional subscription models (Netflix, Spotify, Patreon, etc.) have:
🔴 No resellability – If you cancel early, you lose access with no refunds.
🔴 High platform fees – Middlemen (Apple, Google, Patreon) take 15-30%.
🔴 Lack of transparency – No on-chain proof of how payments are distributed.
🔴 Limited sharing – Users can’t legally transfer unused subscriptions.

A Web3-powered subscription marketplace where:
✅ Users can buy, sell, or share subscriptions as NFTs.
✅ Smart contracts handle recurring payments via stablecoins like USDC.
✅ Subscription owners can resell access to others before expiration.
✅ Content creators receive fair payments without platform middlemen.

• Instead of centralized accounts, users own subscriptions as Semi-Fungible Tokens (ERC-1155 SFTs).
• Each NFT represents a subscription period (e.g., 1-month Netflix access).
• Users can transfer or resell these NFTs before they expire.

• Stablecoins (USDC on Polygon/Arbitrum) handle recurring payments.
• Smart contracts auto-renew subscriptions if the user has sufficient balance.
• Users can choose one-time payments, auto-renewal, or P2P transfer.

• Users who don’t need the subscription anymore can list it for sale.
• New buyers can purchase unused subscription periods at a discount.
• This enables secondary markets for digital services, reducing waste.

• Smart contracts ensure creators receive a fair share instantly.
• No middlemen fees (Apple/Google usually take 15-30%).
• Users can see transparent on-chain revenue distribution.

• Alice buys a 6-month Netflix subscription NFT but only uses 3 months.
• She lists her remaining 3 months on the dApp marketplace.
• Bob buys the remaining 3 months at a discounted price.
• Netflix still gets paid via the smart contract, avoiding revenue loss.

• John subscribes to a Spotify Family Plan but only needs 2 slots.
• He resells 3 unused slots to others, reducing his monthly cost.
• Each user gets their own NFT, ensuring fair and trackable access.

• A Patreon-like creator issues "exclusive access NFTs."
• Fans purchase these NFTs to access premium content.
• They can resell them if they no longer want access.

✅ Gives power to users – No wasted subscriptions, full ownership.
✅ Fair creator payments – No greedy middlemen fees.
✅ More flexible economy – Users can trade, resell, or gift subscriptions.
✅ Cross-platform integration – Works for streaming, gaming, AI tools, etc.

Protocol: ERC-1155 Semi-Fungible Tokens (SFTs) on Polygon

Purpose: To represent subscription periods as tokens that can be transferred, resold, or shared among users.

Details:

• ERC-1155 Standard: This standard allows for the creation of both fungible and non-fungible tokens within a single contract, making it efficient for managing multiple subscription types.

• Polygon Network: Deploying ERC-1155 contracts on Polygon offers scalability and lower transaction fees, enhancing the user experience.

Protocol: Uniswap Foundation

Purpose: To enable users to trade or swap subscription tokens in a decentralized manner.

Details:

• Token Swaps: Integrating with Uniswap allows users to exchange their subscription tokens for other assets or vice versa, providing liquidity and flexibility.

• Charge a small fee on every transaction that occurs in the marketplace.
• This is lower than centralized platforms (which take 15-30%), making it fair.
• Example: If Bob buys a Netflix subscription NFT for $10 USDC, SubSwap takes 3% ($0.30) as a fee.

Just run the following command to test the code:

make test-sepolia