V21Hook
RobinhoodRegisteredLaunchpad hook for heks.fun that charges a hook-delta fee on the pair's numeraire asset: 80% at pool creation decaying linearly to 1% over the first 10 seconds (anti-snipe), with liquidity additions restricted to the protocol vault and principal withdrawal permanently blocked. V2.1 adds an optional NFT-holder window: during this window, buys require a Merkle proof in hookData; sells and all swaps after the window close work without hookData.
What it can do
Its code executes inside each trade in pools that use it.
It can take or add tokens during a swap. Fees, burns and custom curves work this way, and so do scams.
Pools using it let the hook choose the swap fee instead of a fixed tier.
It runs before liquidity is removed, so it can delay or refuse LP exits.
It checks every deposit before it goes in.
It runs when a pool is created, often to lock in that pool’s settings.
It runs when someone donates tokens to the pool’s LPs.