BlackHoleHook
EthereumRegisteredA custom-curve Uniswap v4 hook for ETH/BLK pairs that replaces the standard CLMM with a virtual-reserve constant-product AMM. Acts as its own swap counterparty via beforeSwapReturnsDelta. Liquidity is single-sided BLK with time-locked positions. Buy fees partially seal ETH as non-redeemable reserve; sell fees scale dynamically with trade size. Owner can migrate all reserves to an arbitrary address, bypassing LP locks.
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.