I’m working on a blockchain project where I need to implement a mating system for digital collectibles, just like how CryptoKitties works. I want users to be able to combine two existing NFTs and create a completely new one with mixed traits.
I’m not sure how to approach this in Solidity. Should I store the genetic data on-chain or off-chain? How do I handle the randomness for trait combination? Also, what’s the best way to ensure that the breeding process is fair and the new NFT inherits characteristics from both parent tokens?
Any code examples or guidance on the smart contract structure would be really helpful. I’m particularly interested in how to manage the breeding cooldown periods and ownership transfer of the newly created NFT.
i made smthng similar last year too! the randomness is tough for sure - chainlink vrf is a good choice for fair trait mixing. def dont store everything on-chain tho, those gas fees can get crazy. hash the genetic data and keep the trait metadata off-chain. cooldowns are easy with block timestamps but just a heads up - miners can mess with the time a lil.
This sounds like an awesome project! I’ve been messing around with similar stuff lately - it’s crazy how CryptoKitties basically created this whole NFT breeding genre.
I’m curious about a few things:
First, are you making trait mixing completely predictable based on parent genetics, or adding some randomness/mutations? I’ve seen projects go both ways and it totally changes how the game feels.
How complex do you want the genetics? Simple dominant/recessive stuff, or more complex with multiple genes affecting single traits? The math gets insane once you start layering things.
What’s your plan for the economic side? Breeding fees? Making certain combos cost more? The tokenomics really make or break these games.
Also, how are you handling visuals? Procedural generation or pre-made assets? That choice might actually drive how you structure your genetic data.
What’s your theme/aesthetic? Would love to hear more about your vision!