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BaseRuns code on every swap. Can take tokens from swaps. Sets its own swap fee. Can block LP withdrawals. Takes a cut when LPs withdraw. Gates who can add liquidity. Adjusts deposit amounts. Runs at pool creation. Handles donations to LPs.
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 can change what LPs get back when they remove liquidity.
It checks every deposit before it goes in.
It can adjust token amounts when liquidity is added.
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.