Hippocampus

Ethereum

Runs code on every swap. Can take tokens from swaps. Sets its own swap fee. Runs at pool creation.

0x0ee851f1fe2f4bdba79fee78969e329c136ca0cc First pool 5 Oct 2026View on explorer

CBe carefulNot in Uniswap’s hook registry · Can take tokens out of swaps

Pools

Dynamic-fee pools

Last new pool

31d

Code size

11,484 B

What it can do

Runs code on every swap

Its code executes inside each trade in pools that use it.

Can take tokens from swaps

It can take or add tokens during a swap. Fees, burns and custom curves work this way, and so do scams.

Sets its own swap fee

Pools using it let the hook choose the swap fee instead of a fixed tier.

Runs at pool creation

It runs when a pool is created, often to lock in that pool’s settings.

Automated checks, not an audit

✓Not upgradeableNo proxy pattern found: the code is fixed.

✓No owner foundNo owner() function: nobody has an admin switch (as far as the standard check goes).

!Not in Uniswap’s hook registryUnregistered hooks get less scrutiny. Most scam hooks are unregistered.

✓Source code publishedThe code on the block explorer matches what's deployed (contract: Hippocampus).

iCan change swap amountsIt has a ReturnDelta permission. Normal for fees and burns, but also how fake-quote hooks steal.

?No audit linkedAutomated checks only.

1 total

PairCreatedFeePool ID

ETH / ENGRAM 31d dynamic 0xc3bc…8c73 Tx ↗