What Blackpool is

Blackpool is a venue for trading tokenised stocks on Robinhood Chain without publishing your order first. It is one contract. It keeps a vault of USDG and stock balances, collects sealed orders in batches, and crosses buyers against sellers at the midpoint of the stock's Uniswap V4 pool.

It is called a dark pool because that is what the thing does in equity markets: orders are not displayed, they meet each other at a reference price taken from the lit market, and size that does not meet stays with its owner.

What it is not

• Not an AMM. Blackpool has no liquidity curve and no LPs. If nobody is on the other side of your order in the same batch, nothing fills.
• Not a router. It never swaps on Uniswap. It only reads the pool's price, the same slot0 a swap would move.
• Not private end to end. An order is sealed while the batch takes orders, then opened for a short reveal window before it settles. The page What stays private lists exactly what leaks and when.

The shape of one trade

1. Deposit USDG or a stock into the vault.
2. During the commit window, post the hash of your order with a 1 USDG bond.
3. During the reveal window, open the order. The contract checks it against the hash and locks the size.
4. After the window closes, anyone calls settle. Crossed orders fill at the pool midpoint; the rest goes back to your vault balance.
5. Withdraw whenever you like. Balances not locked in an open order are always withdrawable.

Status

The contract is written and tested. It is not deployed yet. The site reads the real pools it will read, so the prices on the markets table are live, but no order can be placed until the address is published here.