I just built my second dApp on Fhenix and this one changed how I think about NFTs.
It's called FIXN OG a privacy preserving NFT dApp using Fhenix CoFHE on Sepolia.
โ ๏ธ Testnet, its safe but still use a burner wallet.
๐ Live: https://t.co/63eKkOMWsf
๐ Repo: https://t.co/coUj8dnABS
Here's the idea ๐
Most NFTs leak everything the moment they're minted.
FIXN OG flips that.
When you mint:
NFT rarity is encrypted
Special attributes are encrypted
Even mint related data stays private
All stored onchain as FHE types.
Only the owner can decrypt and only when they choose to.
How to try it (actual flow):
1๏ธโฃ Connect wallet
2๏ธโฃ Go to Mint
3๏ธโฃ Upload an image
4๏ธโฃ Fill name + description
5๏ธโฃ Set rarity & special attribute
6๏ธโฃ Mint
Then:
Go to My NFTs
You'll see your NFT, but traits are hidden
Click Decrypt
Traits are revealed only to you
Behind the scenes:
Traits are encrypted client-side using CoFHE
Contract stores encrypted euint values
Decryption requires an EIP-712 permission
Contract verifies it and runs async decrypt
The contract controls access not the UI.
Why I built this:
After building Cipher Bid, I wanted to push further. Not just private actions, but private state that evolves onchain.
FIXN OG explores:
Private traits by default
Owner controlled reveals
Verifiable execution without public exposure
It's not about hiding NFTs.
It's about changing what "ownership" means when data doesn't have to be public.
Still early. Still learning. But building this made one thing clear:
Confidential NFTs on Ethereum are no longer theoretical.
Built with Fhenix CoFHE. Would genuinely love feedback from builders experimenting with onchain privacy ๐
@fhenix
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