Launchpad hook on Arc

Volume (24h)

$0

Value locked (TVL)

$0

All-time volume

$0

Pools using this hook

1

Swaps (24h)

2 (1 traders)

Total swaps

2

What it does

A launchpad tax hook that charges every swap a capped creator and platform fee, with a higher decaying opening fee for early or bot trades, paid to each pool's fee splitter, while LPs can always withdraw freely.

How it works step by step

• Charges a swap tax on registered launchpad pools, made up of a creator fee and a platform fee, taken from swap amounts via return deltas.
• Can apply a higher 'opening' fee right after launch that decays over a set duration, likely to discourage sniping bots.
• Records owed fees per pool as Uniswap v4 claim tokens and lets a per-pool fee splitter redeem them later.
• Only approved liquidity adder addresses can add liquidity (beforeAddLiquidity gate). Withdrawals are never touched.
• Pools must be registered with terms before initialization.

Swap behaviour

Each swap on a registered pool pays a fee computed from the pool's creator fee, platform fee and any active opening (anti-snipe) fee, deducted from the swap via return deltas. Some fee-exempt callers may skip it, and the owner can choose whether bots pay the creator tax.

Liquidity behaviour

Adding liquidity is restricted to addresses the owner approves as liquidity adders. Remove-liquidity callbacks are disabled, so LPs can always withdraw freely.

Fee behaviour

Swap fees combine a creator fee and a platform fee, each bounded by hard-coded maximum constants, plus a temporary opening fee that is higher at launch and decays over a capped duration. The exact percentage caps are not readable from bytecode. Fees accrue as claims for each pool's splitter (creator/platform) to redeem.

Owner & admin controls

The owner can set launch terms and opening-fee parameters, toggle whether bots pay the creator tax, and approve or revoke liquidity adders. Fee values appear bounded by hard-coded MAX constants, but the exact caps cannot be confirmed from bytecode.

Enabled Uniswap v4 callbacks

beforeInitialize, beforeAddLiquidity, beforeSwap, afterSwap, beforeSwapReturnDelta, afterSwapReturnDelta

beforeInitialize: checks the pool is registered and stores its fee terms; beforeAddLiquidity: only allows approved liquidity adders; beforeSwap: computes the current fee and takes it from input; afterSwap: takes fee from output where applicable; beforeSwapReturnDelta/afterSwapReturnDelta: let the hook deduct the fee from swap amounts.

Security & trust assessment

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

Who controls it: A single owner (two-step Ownable) sets launch and opening fee terms, bot tax policy, and approved liquidity adders. They cannot block LP withdrawals.

Risk to user funds: The hook takes a fee slice from swaps, up to hard-coded caps whose exact values are unknown from bytecode. LP principal cannot be locked or drained by the hook.

Security findings

• [medium] Unverified swap tax with return deltas: The hook deducts fees from swaps using return deltas. Max fee constants exist, but their values are not verifiable from bytecode.
• [low] Liquidity adding is gated: Only owner-approved addresses can add liquidity to these pools.
• [info] LP withdrawals unrestricted: Remove-liquidity callbacks are disabled, so the hook cannot block or tax withdrawals.

Contract details

Verified source

No

Bytecode size

15,343 bytes

Upgradeable proxy

No

Detected patterns

erc6909-claims, launchpad, moves-currency, ownable, return-delta, self-unlock, tax

Pools using Launchpad hook