HelioHook on Ethereum

Volume (24h)

$833

Value locked (TVL)

$13

All-time volume

$833

Pools using this hook

1

Swaps (24h)

7 (2 traders)

Total swaps

7

What it does

Gates swaps to a daily UTC session, charges a fixed 1% native-side fee only on HelioRouter swaps (public in-session and sync-bot swaps pay just the LP fee), and permanently locks all pool liquidity.

This read was written for the hook 0xbebb…eacc on Base 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

• Public swaps are allowed only during a fixed daily UTC trading session; outside it only the sync bot and the HelioRouter can swap.
• Every swap through the HelioRouter pays a 1% platform fee on the native-coin side, sent to a fixed fee recipient (the GasVault).
• Router swaps in a closed pool are blocked if the last price sync is too old or the price moves too far from the anchor price.
• Only the factory can create pools and add liquidity, and liquidity can never be removed. Launch liquidity is permanently locked; the factory can only collect LP fees.
• All addresses and parameters are set once at deployment and cannot be changed. There is no admin.

Swap behaviour

Outside the session, public swaps revert. Only the sync bot (no platform fee) and the router (exact-input only, 1% of the native leg taken) can trade, and closed-pool router swaps must pass freshness and price-deviation checks. In-session public swaps pay only the pool's LP fee.

Liquidity behaviour

Only the factory can add liquidity. Any removal of liquidity reverts, except a zero-amount fee-collection poke by the factory, so pool liquidity is permanently locked.

Fee behaviour

HelioRouter swaps pay a fixed 1% of the native-coin amount, taken from the input on buys and from the output on sells. It is held as PoolManager claims and flushed by anyone to the immutable fee recipient; all other swaps pay only the pool's LP fee.

Owner & admin controls

No admin controls found. The factory, router, sync bot and fee recipient are set once by the deployer and the parameters are immutable, though the sync bot can re-anchor the closed-pool reference price.

Enabled Uniswap v4 callbacks

beforeInitialize, beforeAddLiquidity, beforeRemoveLiquidity, beforeSwap, afterSwap, beforeSwapReturnDelta, afterSwapReturnDelta

beforeInitialize: only the factory can create pools, native must be currency0, and the opening price is recorded; beforeAddLiquidity: only the factory can add; beforeRemoveLiquidity: blocks all withdrawals except fee collection; beforeSwap: enforces the session gate and takes 1% from router buys; afterSwap: runs closed-pool price guards and takes 1% from router sell output; beforeSwapReturnDelta/afterSwapReturnDelta: let the hook deduct the 1% router fee.

Security & trust assessment

Risk level: high (verified source, high confidence).

Who controls it: The deployer wires the factory, router, sync bot and fee recipient once, and these can never change. The sync bot controls closed-hours trading and the price anchor but cannot take funds.

Risk to user funds: Router swaps lose a fixed 1% of the native leg; other swaps pay only the LP fee. Liquidity in these pools can never be withdrawn, by design.

Security findings

• [high] LP liquidity permanently locked: beforeRemoveLiquidity reverts any nonzero removal, so liquidity added through the factory can never be withdrawn. Only fee collection is possible.
• [medium] Trading restricted outside session: Outside the fixed daily UTC window, public swaps revert. Only the immutable sync bot and router can trade.
• [info] Fixed 1% router fee: Router swaps pay a hard-coded 1% of the native leg to an immutable fee recipient. It cannot be changed.
• [info] Immutable, no admin: The contract is not a proxy and all roles are set once and cannot change.

Contract details

Verified source

Yes (HelioHook)

Compiler

solc 0.8.26+commit.8a97fa7a

Bytecode size

7,909 bytes

Upgradeable proxy

No

Detected patterns

fee-sharing, moves-currency, return-delta, self-unlock

Pools using HelioHook

• ETH / HELIO (1.00% fee) — 24h volume $833, TVL $13, 7 swaps today