Foilcard on Robinhood Chain

Uniswap v4 Hook Contract 0xa4410efac07068b3a46e5750b97eb73f958860cc on Robinhood Chain · Launchpad · Verified contract

Volume (24h)
$1.85K
Value locked (TVL)
$0
All-time volume
$1.85K
Pools using this hook
1
Swaps (24h)
63 (37 traders)
Total swaps
63

What it does

An immutable token-plus-hook that charges every buyer and seller a fixed 1% of the ETH side of each swap and splits it 40/40/10/10 among four fixed payees, while LPs earn no swap fee but can withdraw freely.

This read was written for the hook 0x9a73…20cc on Robinhood Chain 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

  • The hook is also the token itself: a fixed 10 billion supply coin with no mint, burn, owner, pause or transfer tax.
  • It only allows one pool: native ETH paired with this coin, 0% LP fee, opened by its launcher (the gate).
  • Every swap, buy or sell, pays a 1% levy on the ETH side, rounded up.
  • The levy is held as a claim in the PoolManager and split 40% income, 40% community, 10% shared and 10% platform.
  • Each of the four fixed payees can withdraw only its own share.
Swap behaviour
On every buy or sell, the hook takes 1% of the ETH amount, from the ETH paid in or by grossing up the ETH paid out, using return deltas. Swaps are only allowed in the single home pool.
Liquidity behaviour
No liquidity callbacks; LPs can add and withdraw freely.
Fee behaviour
A fixed 1% levy on the ETH leg of every swap goes to four hard-coded payees: 40% income, 40% community, 10% shared, 10% platform. The pool's LP fee is 0%, so LPs earn no swap fees.
Owner & admin controls
No admin controls found. The fee rate, split and payees are fixed at deployment, and owner() returns the zero address.

Enabled Uniswap v4 callbacks

beforeInitialize, beforeSwap, afterSwap, beforeSwapReturnDelta, afterSwapReturnDelta

beforeInitialize: restricts the hook to one ETH/coin pool opened by the gate; beforeSwap: takes the 1% levy when the ETH amount is specified; afterSwap: takes the 1% levy when the coin amount is specified and checks amounts; beforeSwapReturnDelta/afterSwapReturnDelta: apply the levy to swap amounts.

Security & trust assessment

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

Who controls it: No one holds admin keys. The gate only opens the single pool, and payees can only claim their booked shares.

Risk to user funds: The hook only takes a fixed 1% of the ETH side of each swap. LP principal cannot be locked or drained.

Security findings

  • [info] Fixed 1% swap levy: The levy is hard-coded at 1% of the ETH side and cannot be changed by anyone.
  • [info] Immutable payees: The four payee addresses are set once at deployment, and each can only withdraw its own accrued share.
  • [info] LP withdrawals unrestricted: Remove-liquidity callbacks are disabled, so the hook can never block or charge LP withdrawals.

Contract details

Verified source
Yes (Foilcard)
Compiler
solc 0.8.26+commit.8a97fa7a
Bytecode size
6,531 bytes
Upgradeable proxy
No
Detected patterns
erc20, moves-currency, ownable, return-delta, self-unlock

Pools using Foilcard