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Data Structures

  • Order — { address owner, uint96 size, uint40 prev, uint40 next, uint40 flippedId, uint32 price, uint32 flippedPrice, bool isBuy }
  • PricePoint — { uint40 head, uint40 tail }
  • TreeUint24 — Tree structure for active price points

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Core Functions

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Order Placement

function addBuyOrder(uint32 _price, uint96 _size, bool _postOnly) external
function addSellOrder(uint32 _price, uint96 _size, bool _postOnly) external
Places limit buy/sell orders. Matches against resting orders first. If _postOnly is true, reverts if any portion matches immediately.

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Flip Orders

function addFlipBuyOrder(uint32 _price, uint32 _flippedPrice, uint96 _size, bool _provisionOrRevert) external
function addFlipSellOrder(uint32 _price, uint32 _flippedPrice, uint96 _size, bool _provisionOrRevert) external
Places flip orders that create opposite-side orders on fill. _flippedPrice must be better than _price. If _provisionOrRevert is false, reverts if best price equals current book best.

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Market Orders

function placeAndExecuteMarketBuy(uint96 _quoteSize, uint96 _minOut, bool _isMargin, bool _isFOK) external payable
function placeAndExecuteMarketSell(uint96 _size, uint96 _minOut, bool _isMargin, bool _isFOK) external payable
Executes market orders against resting liquidity. Supports ERC20–ERC20, NATIVE–ERC20, and ERC20–NATIVE pairs. _isFOK enforces fill-or-kill behavior.

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Cancellation

function batchCancelOrders(uint40[] calldata _orderIds) external
function batchCancelFlipOrders(uint40[] calldata _orderIds) external
Batch cancels regular or flip orders. Idempotent—safe to call multiple times.

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Liquidity Provision

function addPairedLiquidity(uint32 _bidPrice, uint32 _askPrice, uint96 _bidSize, uint96 _askSize) external
function batchProvisionLiquidity(uint32[] calldata _prices, uint96[] calldata _sizes, bool[] calldata _isBid) external
Adds liquidity to the AMM vault. addPairedLiquidity sets bid/ask prices and sizes. Batch function allows provisioning multiple price points at once.

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View Functions

function bestBidAsk() external view returns (uint32, uint32)
function getL2Book() external view returns (bytes)
function getL2Book(uint32 _bidPricePoints, uint32 _askPricePoints) external view returns (bytes)
function getMarketParams() external view returns (MarketParams memory)
Returns best bid/ask prices, L2 order book depth, and market configuration parameters.

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Market States

  • ACTIVE — Full operations enabled
  • SOFT_PAUSED — Only cancels, deposits, withdrawals allowed
  • HARD_PAUSED — All operations halted

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Order Types

TypeDescriptionprevnext
ASingle orderNULLNULL
BHead with nextNULLNON-NULL
CMiddle orderNON-NULLNON-NULL
DTail orderNON-NULLNULL

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Events

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OrderCreated

event OrderCreated(
    uint40 indexed orderId,
    address indexed owner,
    uint96 size,
    uint32 price,
    bool isBuy
);
Emitted when a new limit order is placed on the order book.

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FlipOrderCreated

event FlipOrderCreated(
    uint40 indexed orderId,
    uint40 indexed flippedId,
    address indexed owner,
    uint96 size,
    uint32 price,
    uint32 flippedPrice,
    bool isBuy
);
Emitted when a flip order is created. flippedId is the order ID that will be created on the opposite side when this order fills.

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Trade

event Trade(
    uint40 orderId,
    address indexed maker,
    bool isBuy,
    uint32 price,
    uint96 updatedSize,
    address indexed taker,
    address indexed origin,
    uint96 filledSize
);
Emitted for each order fill. updatedSize is the remaining size after fill. origin is the original transaction sender (supports meta-transactions).

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OrderCanceled

event OrderCanceled(
    uint40 indexed orderId,
    address indexed owner,
    uint96 size,
    uint32 price,
    bool isBuy
);
Emitted when an order is successfully canceled. Returns the full order size before cancellation.

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MarketStateUpdated

event MarketStateUpdated(
    MarketState prevState,
    MarketState newState
);
Emitted when market state changes (ACTIVE, SOFT_PAUSED, or HARD_PAUSED).