Hook

Ethereum

Hook is a Uniswap v4 hook on Ethereum. Runs code on every swap. Can take tokens from swaps. Takes a cut when LPs withdraw. Runs at pool creation.

Contract name: Hook

0xc52c478479b581d7f720dbcfdd2373feeeb12145 First pool 11 Nov 2026View on explorer

Launch a pool with this hook

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

37 identical copies

Pools

Last new pool

Code size

3,042 B

How this hook works

Sell fee

A simple launch hook for ETH pools that charges a fee only on sells, and also on ETH taken out when liquidity is removed. The fee goes straight to the token creator.

Fee on sells only

When a trader sells the token for ETH, a share of the ETH they get is sent straight to the token creator. Buys pay no hook fee.

The code that does this (_afterSwap):

function _afterSwap(address, PoolKey calldata key, SwapParams calldata params, BalanceDelta delta, bytes calldata)
    internal
    override
    returns (bytes4, int128)
{
    if (params.zeroForOne) return (this.afterSwap.selector, 0);

    int128 ethOut = delta.amount0();
    if (ethOut <= 0) return (this.afterSwap.selector, 0);

    uint256 fee = uint256(uint128(ethOut)) * creatorFeeBps / 10_000;

    poolManager.take(key.currency0, creator, fee);
    emit CreatorFeeTaken(creator, fee);

    return (this.afterSwap.selector, int128(int256(fee)));
}

Fee on removing liquidity

When liquidity providers take liquidity out, the same share of the ETH they remove goes to the token creator too.

The code that does this (_afterRemoveLiquidity):

function _afterRemoveLiquidity(
    address,
    PoolKey calldata key,
    ModifyLiquidityParams calldata,
    BalanceDelta delta,
    BalanceDelta,
    bytes calldata
) internal override returns (bytes4, BalanceDelta) {
    int128 ethOut = delta.amount0();
    if (ethOut <= 0) {
        return (this.afterRemoveLiquidity.selector, toBalanceDelta(0, 0));
    }

    uint256 fee = uint256(uint128(ethOut)) * creatorFeeBps / 10_000;

    poolManager.take(key.currency0, creator, fee);
    emit CreatorFeeTaken(creator, fee);

    return (this.afterRemoveLiquidity.selector, toBalanceDelta(int128(int256(fee)), 0));
}

Fixed rate
The fee rate is set when the hook is made, at most 10%, and never changes.

Who controls it: The fee rate is fixed. The token creator can hand their role, and the fee, to another wallet. The code cannot be upgraded.

Based on the hook’s published code.

Safety report

Before you build on it. Automated checks, not an audit

4 to review4 passed1 info1 unknown

Contract

✓Code is fixedNo proxy, so the code that runs today is the code that runs tomorrow.

✓No admin key foundIt has no owner wallet, so the hook developer has no single key to change its rules (as far as the standard check goes).

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

Pools2 to review

!Pools don’t trade in Uniswap’s app yetIt runs code on swaps, so Uniswap’s app only routes it once Uniswap Labs approves it, and it isn’t approved yet. Adding liquidity still works, and other apps can trade it.

!Can change swap amountsIt has return-delta permissions, so it can take or add tokens in every trade (taxes, fees, burns, custom curves). Check where that value goes and who controls it.

✓Won’t reject swapsNo beforeSwap, so trades always reach the pool’s curve.

Track record2 to review

!Not in Uniswap’s hook registryNot listed by Uniswap Labs, so nobody outside the hook developer has looked at it. Most abandoned and malicious hooks are unlisted.

!Brand newIts first pool was created less than a day ago, so it has no track record. Prefer proven hooks for a real launch.

?No audit linkedNothing in the registry. Ask the hook developer for one or review the source yourself.

iKnown template37 other deployments share this exact bytecode, often a launchpad deploying one per token.

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.

Takes a cut when LPs withdraw

It can change what LPs get back when they remove liquidity.

Runs at pool creation

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

Hook history

Paid the token creator its fee 1 time
Latest transactions
- 0x3e2e7e22…8a2142 block 26,388,806
See every one on the explorer ↗

Counted from what the hook recorded on-chain across all its pools, for every action in its published code, plus token transfers in and out of it.

Pools

1 total

PairCreatedTrades · 7dPool ID

ETH / ELON 5h 2 trades · 7d 0xd29c…ffdb Tx ↗