You do not pick the date
The issuer sets the calendar, and nobody asks the pool. A record date is published weeks out, lands on a Tuesday morning, and the curve has no idea any of it happened.
Decided by
The issuer
Uniswap v4 hook · Base Sepolia
Your pool should not
pay for the split.
A corporate action reprices an asset at a known moment, by a known factor, with nobody trading. Nothing lands in the pool to tell it, so it keeps quoting yesterday's number. The curve stays wrong for exactly as long as nobody looks.
Ambrya is the hook that looks.
Uniswap v4 hook Base Sepolia · testnet Open ↗Nothing here is dressed up.
No token sale. No TVL to quote. No audit yet, because there is no mainnet contract to audit. This is the real state of it.
v4
Hook version
84532
Base Sepolia
audit
Gate for mainnet liquidity
Deployment registry
Nothing is live yet.
When the token exists, its address appears here and nowhere else first. Until this box shows one, any contract claiming to be Ambrya is not ours. Check this page before you buy anything.
Quiet for weeks, then not
Nothing happens for a month.
Then everything happens in one block.
The cost is not gradual
A dividend moves the quote by a few basis points and barely registers. A four for one split divides the fair price by four in a single step. Same mechanism, four orders of magnitude apart.
Simulated
−$250,000
Somebody has to be watching
The information is public and free. It just has to be read at the right second by something that can act on it before the pool settles the next swap. People stop doing that in week three.
Window
One block
If you provide liquidity to a pool holding a tokenized equity, this runs underneath and you should expect to forget it exists. On the handful of days a year when an action lands, it charges the arbitrageur instead of you. On every other day it should cost you nothing and say nothing.
The ledger
Three columns,
one corporate action.
Armed · nothing scheduled on testnet
| Before | Unguarded | With the hook | |
|---|---|---|---|
| Token reserves | 10,000 | 20,000 | 40,000 |
| Stablecoin reserves | $1,000,000 | $500,000 | $1,000,000 |
| Quoted price | $100.00 | $25.00 | $25.00 |
| Repriced by | … | The first trade | The hook, at the event |
| To the pool | … | $0 | $237,500 |
95% of what the hook recovers goes to the liquidity providers and 5% to the protocol. The numbers above are arithmetic, not a projection, and you can walk them yourself in the note.
The hook
From the record date
to the pool's balance.
Three calls, inside the lifecycle, in the few thousand gas between a swap arriving and the pool settling it.
Read the calendar
The hook asks an attested feed whether this pool has an action pending. Splits and dividends are scheduled, so this is a lookup rather than a prediction.
Move the curve first
At the event the pool goes to the post action price in one atomic step, so the first swap of the block meets a fair market instead of a stale one.
Sell what is left
Whatever gap survives goes to a sealed auction. Somebody still takes the trade, and the winning bid lands in the pool instead of in their wallet.
The entry point
One function, one block,
one decision.
// runs before the pool settles the swap in front of it
function beforeSwap(
address sender,
PoolKey calldata key,
IPoolManager.SwapParams calldata params,
bytes calldata hookData
) external override returns (bytes4, BeforeSwapDelta, uint24) {
Action memory a = feed.pending(key.toId());
if (a.recordDate != 0 && a.recordDate <= block.timestamp) {
_reprice(key, a.numerator, a.denominator); // curve moves first
_settleResidual(key, a.auctionId); // the rest goes to auction
}
return (BaseHook.beforeSwap.selector, ZERO_DELTA, _fee(key));
}Illustrative, not the deployed source. There is no mainnet deployment to point at yet, and this page will say so until there is.
Fee controller
The fee is a function,
not a constant.
Ambrya runs a dynamic fee onchain. When volatility climbs the fee climbs with it, which is exactly when uninformed liquidity gets picked off. When the market calms down the fee drops back, so routers keep choosing the pool.
Auctioned, not raced
Bidders compete for the right to take the gap. The winning bid lands in the pool instead of with whoever pays the most for block position.
Routed in one transaction
Arbitrum, HyperEVM, Base and Polygon are the target set, with reach into HyperCore and connected lending markets. None of it is on mainnet yet.
Fee against volatility
Volatility
Swap fee
Integrations
Your launch.
Liquidity that holds.
95% to LPs
Fee only pools keep 95% of swap fees with the liquidity providers and send 5% to the protocol.
Pool options for your launch
Legacy V2 and concentrated V3 pools on every supported chain, with DLMM available on select networks.
Your launch. Your rules.
You keep control of your launch and your graduation mechanics, and we stay on the integration with you.
Target networks
Arbitrum
HyperEVM
Base
Polygon
Questions we actually get
What is xAMB?
xAMB carries the votes. It borrows the useful half of vote escrow, which is that long term holders steer emissions, and drops the half that traps you for four years. Balances stay liquid and the weight comes from participation instead of sentence length.
What is f33?
f33 is xAMB you can still move. It votes for you each epoch and folds the rewards back into the position, so you are not logging in every Thursday to click a gauge. On HyperEVM the same asset trades as HyperAmbrya.
How do dynamic fees work?
The fee is a function, not a constant. The controller reads realised volatility from the pool itself and raises the fee while the market is moving, which is exactly when uninformed liquidity gets picked off. When variance drops, so does the fee, so routers keep choosing the pool.
Which chains does Ambrya support?
The target set is Arbitrum, HyperEVM, Base and Polygon, with routing that can reach HyperCore and connected lending markets inside the same transaction. None of it is on mainnet yet.
How does the auction work?
The gap a repricing event opens is auctioned instead of raced. Bidders compete for the right to take it, the winning bid lands in the pool, and the value ends up with the capital that created the opportunity rather than with whoever pays the most for block position.
Has Ambrya been audited?
Not yet, and there is nothing deployed to audit. When there is, external review happens before a single unit of mainnet liquidity is accepted, and the report goes up next to the docs. It is a gate, not a badge.
Point a pool at it.
Connect a wallet, add liquidity or stake xAMB, and earn from every trade the protocol routes.
Open the app →