Likely launchpad hook on HyperEVM

Uniswap v4 Hook Contract 0x68e07a57fb5f7e2c5d952c1bdcc789c86d3ae8cc on HyperEVM · Launchpad

Volume (24h)
$0
Value locked (TVL)
$0
All-time volume
$0
Pools using this hook
2
Swaps (24h)
91 (38 traders)
Total swaps
91

What it does

A token launchpad hook that charges buy and sell fees on swaps, with extra anti-sniper fees right after launch, and shares them among creators, the platform, buybacks and rewards, while never touching LP withdrawals.

This read was written for the hook 0xe93d…28cc on HyperEVM and reused here: the two share a code shape, so constants such as fees, owners and addresses can differ.

How it works step by step

  • Launches new tokens with their own Uniswap v4 pool and fixed initial supply through a launch function.
  • Charges buy and sell fees on swaps, including a higher anti-sniper fee shortly after launch, with buy fees limited by a built-in maximum.
  • Splits collected fees among the token creator, the platform, buybacks and reward distribution, claimable later.
  • Can compound accrued fees back into pool liquidity and execute buybacks of the launched token.
  • Restricts liquidity additions, likely so only the hook itself manages pool liquidity.
Swap behaviour
Before and after each swap the hook can take a buy or sell fee directly from the swap amounts, with an extra decaying sniper fee near launch; some addresses may be exempt. Exact fee percentages could not be read from bytecode.
Liquidity behaviour
The hook checks liquidity additions and likely blocks outside LPs from adding to launched pools. Remove-liquidity callbacks are disabled, so the hook cannot block or charge withdrawals.
Fee behaviour
Buy and sell fees are taken via swap return deltas and split between creator, platform (protocol fee), buybacks and rewards; buy fees are capped by a MAX_TOTAL_BUY_FEE constant whose value is unknown from bytecode, and the sell fee cap is not visible.
Owner & admin controls
A one-time router binding exists and the platform can claim its accrued fees; no clear fee-setting admin functions are visible, but caps and exact roles cannot be confirmed from bytecode.

Enabled Uniswap v4 callbacks

beforeInitialize, beforeAddLiquidity, beforeSwap, afterSwap, beforeSwapReturnDelta, afterSwapReturnDelta

beforeInitialize: restricts pool creation to hook launches; beforeAddLiquidity: gates who can add liquidity; beforeSwap: applies fees and sniper protection on input; afterSwap: takes fees on output and accounts for rewards; beforeSwapReturnDelta/afterSwapReturnDelta: lets the hook deduct its fee from swap amounts.

Security & trust assessment

Risk level: medium, estimated (decoded bytecode, medium confidence).

Who controls it: The platform and token creators can claim their fee shares and a router can be bound; no visible function lets an admin raise fees arbitrarily, though this is unconfirmed without source.

Risk to user funds: Traders pay buy/sell and sniper fees taken from swap amounts, with exact ranges unknown from bytecode. LP principal cannot be locked by the hook since withdrawal callbacks are disabled.

Security findings

  • [medium] Unverified fee-taking hook: The hook deducts buy/sell and sniper fees from swaps via return deltas; buy fees have a named cap but exact values and any sell fee cap cannot be verified from bytecode.
  • [info] LP withdrawals not hookable: Remove-liquidity callbacks are disabled, so the hook cannot block or tax liquidity withdrawals.
  • [low] Hook-held fee balances: Accrued creator, platform and buyback funds sit in hook accounting and are paid out via claim, buyback and compounding functions.

Contract details

Verified source
No
Bytecode size
18,517 bytes
Upgradeable proxy
No
Detected patterns
erc20, moves-currency, return-delta, self-unlock

Pools using Likely launchpad hook