What Blacksite is
Blacksite is a venue for trading tokenised stocks on Robinhood Chain without publishing your order first. It is one contract. It keeps a vault of…
Glossary
Batch. A run of 21 L1 blocks: 16 to commit, 5 to reveal. Numbered from zero at deployment.
Commitments
A commitment is the only thing an order puts on-chain while the batch takes orders.
Settlement
settle(batch, market) can be called by anyone once the batch's reveal window has closed, and succeeds once per batch and market.
Rounding
Settlement divides a lot, and integer division drops remainders. Blacksite chooses the direction of every one of them so the book can never pay…
Staking
Staking is built into the venue. There is no separate rewards contract.
What the contract guarantees
This page separates what the Blacksite contract enforces from what it does not. If something is not on the first list, do not assume it.
Admin powers
The owner is set at deployment and handed to the treasury with a two-step transfer (transferOwnership, then acceptOwnership from the new address).
Computing a commitment
The commitment is plain abi.encode then keccak256. Compute it off-chain; commitmentOf exists to check your code against the contract.
Running a keeper
A keeper does two things, and anyone can do them.
What comes next
Each item appears on this page as done only when it is done.
The life of a batch
Batches run back to back from the block the contract was deployed in. Each one has a commit window and a reveal window; settlement happens after…
The vault
Every order is paid from, and paid into, a balance the contract keeps for you. Tokens only move on deposit and withdraw; everything else is…
Reveal
In the 5 reveal blocks of the batch, you call:
The price guard
Blacksite trusts the pool for its price. The price guard is what stops that trust from being exploited in a single block.
Fees
Unfilled size pays nothing.
Markets
A market is a stock plus one Uniswap V4 pool key against USDG. At launch every market uses the pool with fee 0.30 %, tick spacing 60 and no hook.
Risks
The contract is tested, including fuzzing of settlement, but it has not been audited. Deposit what you are prepared to lose.
Contract reference
Solidity 0.8.28, no proxy, no external dependencies beyond a 512-bit mulDiv. Source in the verified source.
Reading V4 prices
Uniswap V4 keeps every pool inside one PoolManager, at 0x8366a39CC670B4001A1121B8F6A443A643e40951 on Robinhood Chain. Pool state is not exposed…
Proof of funds in zero knowledge
This is the plan for version 2. None of it is in the contract you can use today.