# Supabase Launches NFT Marketplace

[Supabase](https://yomu.fyi/company/supabase) · Ant Wilson · Apr 1, 2021

**Type:** Announcement

## Summary

Non-fungible tokens frequently suffer from the copy-paste problem, where public URLs allow unauthorized users to download underlying media directly from web hosts or IPFS. To address this issue, BuyMeth proposes combining public blurhash thumbnails with full image files encrypted under the active owner's cryptographic key and hosted on IPFS. Completed sales trigger Metamask to re-encrypt the file with the buyer's public key, followed by a one-week escrow challenge window where automated verification matches decrypted image hashes against public thumbnails. Ongoing royalty distributions to previous owners provide a financial mechanism to disincentivize leaking unencrypted original image files. The announced platform serves as an April Fools joke rather than an active Supabase product release.

## Context

Standard NFTs contain public URLs to images hosted on web servers or IPFS, allowing non-owners to download original media directly without possessing token ownership.

## Approach / What changed

BuyMeth pairs an on-token blurhash with an IPFS link to an image encrypted by the current owner's key. Upon sale, Metamask re-encrypts the asset with the buyer's public key, updating the token URL. An escrow contract retains funds across a one-week challenge period while the buyer decrypts the file and verifies it against the blurhash, backed by resale royalties to deter past owners from leaking original media.

## Takeaways

- Standard NFT architectures expose media assets to non-owners through openly accessible web or IPFS URLs.
- The BuyMeth design pairs public blurhash metadata with owner-encrypted IPFS payloads that are re-encrypted with the buyer's public key during sales.
- Transaction security relies on a one-week escrow window allowing buyers to submit cryptographic proof if decrypted files fail automated blurhash checks.

**Tags:** [Architecture](https://yomu.fyi/topic/architecture)

[Read original post](https://supabase.com/blog/supabase-nft-marketplace)