UCards

EthereumRegistered

A Uniswap v4 hook for a single ETH/token pool that collects configurable buy and sell fees in ETH via BeforeSwapDelta and AfterSwapDelta, accumulating them in the hook for a designated tax wallet to withdraw. Includes an optional per-swap token cap (as a % of supply) that auto-lifts after a configured block window, with manual override by the tax wallet.

0x48ab86faca91b6353c1018351cc47b40fe15c0cc First pool 19 May 2026View on explorer

ALooks safeRegistered, verified, immutable

Pools

Dynamic-fee pools

Last new pool

5mo

Code size

6,804 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.

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

✓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: UCards).

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

1 total

PairCreatedFeePool ID

ETH / UCARD 5mo 0.00% 0x4022…16e3 Tx ↗