YinYangHook

EthereumRegistered

A twin-token hook for the YinYang project that bootstraps ETH/Yin and ETH/Yang pools on first liquidity add, then on each swap mints or burns token "piece" state based on the buy/sell direction. Takes a per-swap skim fee (up to 20% sniper tax during the first 10 seconds after pool launch, then a configurable base rate) forwarded to a owner-controlled destination via `afterSwapReturnsDelta`.

0x0d081fc9dd65b751f340bed5a3619d5fba7b8444 First pool 31 May 2026View on explorer

ALooks safeRegistered, verified, immutable

Pools

Dynamic-fee pools

Last new pool

5mo

Code size

13,095 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.

Safety report

Automated checks, not an audit

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

!Has an adminowner() is 0x4c47…fa59. That account can usually change fees, limits or allowlists after you trade.

✓Listed in Uniswap’s hook registryRegistered with Uniswap Labs (a listing, not a security review).

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

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.

Pools using this hook

2 total

PairCreatedFeePool ID

ETH / YANG 5mo 1.00% 0x6d3c…ccf4 Tx ↗

ETH / YIN 5mo 1.00% 0x34c1…d1d7 Tx ↗