Dynamic NFTs have a dilemma:
・Either you centralise metadata to make traits easy to change
・Or you store traits in the contract, but lose indexing by not returning them from the tokenURI

Until now, thanks to /icp 

Free customisable (!) mint on @base to explore for yourself

Dynamic NFTs have a dilemma:
・Either you centralise metadata to make traits easy to change
・Or you store traits in the contract, but lose indexing by not returning them from the tokenURI

Until now, thanks to /icp 

Free customisable (!) mint on @base to explore for yourself
https://onchain100-frame.vercel.app/api

Building Proof of IRL Human Connection at https://paired.world • Nanotechnology postgrad @ St Catz, Oxford 

ICP canisters can receive and make HTTP requests. The premise of this hybrid-chain dynamic NFT is pretty simple

The NFT is from a standard ERC-720 contract on @base, but the baseURI is set to the url of an ICP canister

The result - dynamic NFTs whose traits are still searchable on all your favourite marketplaces and by rarity indexers, even after they change. We had this challenge with our dynamic SOUL tokens at PairedWorld, and hybrid chain NFTs seem like a good solution

just remember to refresh metadata on OpenSea after a change!

Some considerations:
· Canisters on IC spend Cycles to make HTTP requests. Each call to this canister's getMetadata endpoint costs about 1.5m Cycles, or roughly $0.0002 
· IC canister are upgradable - to ensure decentralised metadata, the canister developer should remove the controller so its code can't be edited

I'll open-source a starter project for an ICP canister that read metadata from EVM, so devs can easily explore making their own hybrid NFTs 

In the meantime, try minting your own from the frame and choosing your favourite colour and icon from the tech projects that made this possible!

When the canister receives a request from the contract via the tokenURI method, it reads the on-chain trait values directly from the actual contract and generates a string formatted as a JSON conforming to the Metadata standard and returns it as the HTTP response