Listen to the pool
An afterSwap or afterAddLiquidity callback detects real activity and decides whether to mint.
Uniswap V4 hook object
Unicats
A simple on-chain cat collection: clean shapes, deterministic seeds, and lightweight metadata so the hook can mint at scale without losing personality.
10,000
max supply
8
trait groups
V4
hook minting
0
session mints
Mint flow
The hook turns activity into Unicats.
The concept: each valid pool event produces a seed, the seed selects simple traits, and the contract mints the NFT to the user who triggered the action.
Unicats collection
Simple cats, many combinations.
Hook V4
The technical idea in three steps.
Derive the seed
Pool, trader, tick, block, and nonce produce a hash; traits and rarity come from that seed.
Mint the cat
The contract records the Unicat, stores seed/metadata, and delivers the ERC-721 to the receiver.
afterSwap(pool, sender, delta) {
if (delta.volume > mintThreshold) {
seed = keccak256(pool, sender, block.number, nextId);
_mintUnicat(sender, nextId, seed);
}
}Mass generator
Ready to output the collection in batches.
This folder includes a local generator that produces SVGs and JSON metadata. Change the count and move from a small sample to a full collection.