Uniswap v4 · Robinhood Chain
Own the mill.
Keep the toll.
A miller never bets on the price of grain. He owns the stones, and keeps a portion of everything that passes through them. Quern puts your dollars and your shares in the path of the trade — as liquidity in Uniswap v4 — and every order that grinds through your price range pays you the pool's fee.
The whole of it
Three decisions, one transaction
There is no Quern contract between you and your money. A position is an ordinary Uniswap v4 position, held as an NFT by your own wallet, and you can manage or close it at Uniswap's own interface whether this site exists or not.
1 · Pick a mill
Each listed stock has one — the deepest hookless v4 pool trading it against USDG. Quern shows the fee it charges, how much is working at the price, and what the protocol takes off the top.
2 · Set the gap
The price range you will make a market between. Narrow earns the most per dollar and goes one-sided soonest; wide earns less and sits through more. You can also set the two prices by hand.
3 · Collect the toll
Fees accrue to the position as the market trades through it. Take them whenever you like without touching the position, add to it, withdraw part, or close it and take everything back.
Live
The mills
Read from the chain at the block below. “Working” is the value of the liquidity within 1% of the price — what a trade at the touch actually meets. “Keep” is the share of each trade that reaches providers, after the protocol's cut.
| Stock | Price | Fee | You keep | Working now | |
|---|---|---|---|---|---|
| Reading the chain… | |||||
Before you do this
Market-making is not a savings account
You are buying as it falls, selling as it rises
Inside your range the pool sells your shares into strength and buys them back into weakness. If the price leaves your range and stays there, you end up holding entirely the losing side — worth less than if you had simply held both. That gap is called impermanent loss, and the fees are what you are paid to bear it.
A narrow gap is a busier mill and a shorter one
Concentrating your liquidity multiplies the fees it earns while the price is inside — and stops earning the moment the price is outside. Quern shows where the price is against your range on every position, so “out of range” is never a surprise.
Nothing here is advice
Quern is a way to send transactions you could build yourself. It cannot move your money: it has no contract, no custody, no admin key, and no ability to act without your wallet signing first.
What it costs
Gas, and nothing else. Quern charges no fee, takes no cut of the toll, and has no token. The only fees are Uniswap's own, which you are on the receiving side of.
Checked, not asserted
Every transaction on this site is built by one file
That file is run against the real Uniswap v4 contracts on a fresh fork of Robinhood Chain before anything is published — positions opened, earned on, added to, withdrawn and closed, in pools of both orientations. Deliberately broken copies of it are run through the same suite to check the suite can still fail.