matching

package
v0.72.12 Latest Latest
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 Go to latest Published: Aug 25, 2023 License: MIT Imports: 18 Imported by: 0

README

Matching package

A trade matching engine matches up order bids and offers to generate trades. Matching engines allocate trades among competing bids and offers at the same price.

Calculating the cost of closing a trader out

This call will calculate the "cost" to the trader should the be closed out (based on current position). The actual position should be passed, along with a Side. If the trader holds a long position, the call should be:

closeOutPNL := matchingEngine.GetClosePNL(position.Size(), types.Side_Sell)

Internally, the matching engine will iterate over the order book (buy/sell side depending on the second argument). The "cheapest" orders will be used first. This means that, for the buy side, the price levels are traversed backwards (the levels are tracked in descending order). The sell side is stored in ascending order, and is traversed as-is.

This call has no effect on the order status (i.e. it won't change the Remaining field of the orders).

Documentation

Index

Constants

This section is empty.

Variables

View Source 
var (
	// ErrNotEnoughOrders signals that not enough orders were
	// in the book to achieve a given operation.
	ErrNotEnoughOrders   = errors.New("insufficient orders")
	ErrOrderDoesNotExist = errors.New("order does not exist")
	ErrInvalidVolume     = errors.New("invalid volume")
	ErrNoBestBid         = errors.New("no best bid")
	ErrNoBestAsk         = errors.New("no best ask")
	ErrNotCrossed        = errors.New("not crossed")
)
View Source 
var (
	// ErrWashTrade signals an attempt to a wash trade from a party.
	ErrWashTrade    = errors.New("party attempted to submit wash trade")
	ErrFOKNotFilled = errors.New("FOK order could not be fully filled")
)
View Source 
var ErrPriceNotFound = errors.New("price-volume pair not found")

ErrPriceNotFound signals that a price was not found on the book side.

Functions

This section is empty.

Types

type BookCache 

type BookCache struct {
	// contains filtered or unexported fields
}

func NewBookCache 

func NewBookCache() BookCache

func (*BookCache) GetIndicativePrice 

func (c *BookCache) GetIndicativePrice() (*num.Uint, bool)

func (*BookCache) GetIndicativeUncrossingSide 

func (c *BookCache) GetIndicativeUncrossingSide() (types.Side, bool)

func (*BookCache) GetIndicativeVolume 

func (c *BookCache) GetIndicativeVolume() (uint64, bool)

func (*BookCache) Invalidate 

func (c *BookCache) Invalidate()

func (*BookCache) SetIndicativePrice 

func (c *BookCache) SetIndicativePrice(v *num.Uint)

func (*BookCache) SetIndicativeUncrossingSide 

func (c *BookCache) SetIndicativeUncrossingSide(s types.Side)

func (*BookCache) SetIndicativeVolume 

func (c *BookCache) SetIndicativeVolume(v uint64)

type CachedOrderBook 

type CachedOrderBook struct {
	*OrderBook
	// contains filtered or unexported fields
}

func NewCachedOrderBook 

func NewCachedOrderBook(
	log *logging.Logger, config Config, market string, auction bool, peggedCounterNotify func(int64),
) *CachedOrderBook

func (*CachedOrderBook) AmendOrder 

func (b *CachedOrderBook) AmendOrder(
	originalOrder, amendedOrder *types.Order,
) error

func (*CachedOrderBook) CancelAllOrders 

func (b *CachedOrderBook) CancelAllOrders(
	party string,
) ([]*types.OrderCancellationConfirmation, error)

func (*CachedOrderBook) CancelOrder 

func (b *CachedOrderBook) CancelOrder(order *types.Order) (*types.OrderCancellationConfirmation, error)

func (*CachedOrderBook) DeleteOrder 

func (b *CachedOrderBook) DeleteOrder(
	order *types.Order,
) (*types.Order, error)

func (*CachedOrderBook) EnterAuction 

func (b *CachedOrderBook) EnterAuction() []*types.Order

func (*CachedOrderBook) GetIndicativePrice 

func (b *CachedOrderBook) GetIndicativePrice() *num.Uint

func (*CachedOrderBook) GetIndicativePriceAndVolume 

func (b *CachedOrderBook) GetIndicativePriceAndVolume() (*num.Uint, uint64, types.Side)

func (*CachedOrderBook) LeaveAuction 

func (b *CachedOrderBook) LeaveAuction(
	at time.Time,
) ([]*types.OrderConfirmation, []*types.Order, error)

func (*CachedOrderBook) LoadState 

func (b *CachedOrderBook) LoadState(ctx context.Context, payload *types.Payload) ([]types.StateProvider, error)

func (*CachedOrderBook) RemoveDistressedOrders 

func (b *CachedOrderBook) RemoveDistressedOrders(
	parties []events.MarketPosition,
) ([]*types.Order, error)

func (*CachedOrderBook) RemoveOrder 

func (b *CachedOrderBook) RemoveOrder(order string) (*types.Order, error)

func (*CachedOrderBook) ReplaceOrder 

func (b *CachedOrderBook) ReplaceOrder(rm, rpl *types.Order) (*types.OrderConfirmation, error)

func (*CachedOrderBook) SubmitOrder 

func (b *CachedOrderBook) SubmitOrder(
	order *types.Order,
) (*types.OrderConfirmation, error)

type Config 

type Config struct {
	Level encoding.LogLevel `long:"log-level"`

	LogPriceLevelsDebug   bool `long:"log-price-levels-debug"`
	LogRemovedOrdersDebug bool `long:"log-removed-orders-debug"`
}

Config represents the configuration of the Matching engine.

func NewDefaultConfig 

func NewDefaultConfig() Config

NewDefaultConfig creates an instance of the package specific configuration, given a pointer to a logger instance to be used for logging within the package.

type CumulativeVolumeLevel 

type CumulativeVolumeLevel struct {
	// contains filtered or unexported fields
}

CumulativeVolumeLevel represents the cumulative volume at a price level for both bid and ask.

type IndicativePriceAndVolume 

type IndicativePriceAndVolume struct {
	// contains filtered or unexported fields
}

func NewIndicativePriceAndVolume 

func NewIndicativePriceAndVolume(log *logging.Logger, buy, sell *OrderBookSide) *IndicativePriceAndVolume

func (*IndicativePriceAndVolume) AddVolumeAtPrice 

func (ipv *IndicativePriceAndVolume) AddVolumeAtPrice(price *num.Uint, volume uint64, side types.Side)

func (*IndicativePriceAndVolume) GetCumulativePriceLevels 

func (ipv *IndicativePriceAndVolume) GetCumulativePriceLevels(maxPrice, minPrice *num.Uint) ([]CumulativeVolumeLevel, uint64)

func (*IndicativePriceAndVolume) RemoveVolumeAtPrice 

func (ipv *IndicativePriceAndVolume) RemoveVolumeAtPrice(price *num.Uint, volume uint64, side types.Side)

type OrderBook 

type OrderBook struct {
	Config
	// contains filtered or unexported fields
}

OrderBook represents the book holding all orders in the system.

func NewOrderBook 

func NewOrderBook(log *logging.Logger, config Config, marketID string, auction bool, peggedCountNotify func(int64)) *OrderBook

NewOrderBook create an order book with a given name.

func (*OrderBook) AmendOrder 

func (b *OrderBook) AmendOrder(originalOrder, amendedOrder *types.Order) error

AmendOrder amends an order which is an active order on the book.

func (*OrderBook) BestBidPriceAndVolume 

func (b *OrderBook) BestBidPriceAndVolume() (*num.Uint, uint64, error)

BestBidPriceAndVolume : Return the best bid and volume for the buy side of the book.

func (*OrderBook) BestOfferPriceAndVolume 

func (b *OrderBook) BestOfferPriceAndVolume() (*num.Uint, uint64, error)

BestOfferPriceAndVolume : Return the best bid and volume for the sell side of the book.

func (*OrderBook) BidAndAskPresentAfterAuction 

func (b *OrderBook) BidAndAskPresentAfterAuction() bool

func (*OrderBook) CanLeaveAuction 

func (b *OrderBook) CanLeaveAuction() (withTrades, withoutTrades bool)

CanLeaveAuction calls canUncross with required trades and, if that returns false without required trades (which still permits leaving liquidity auction if canUncross with required trades returs true, both returns are true.

func (*OrderBook) CanUncross 

func (b *OrderBook) CanUncross() bool

CanUncross - a clunky name for a somewhat clunky function: this checks if there will be LIMIT orders on the book after we uncross the book (at the end of an auction). If this returns false, the opening auction should be extended.

func (*OrderBook) CancelAllOrders 

func (b *OrderBook) CancelAllOrders(party string) ([]*types.OrderCancellationConfirmation, error)

func (*OrderBook) CancelOrder 

func (b *OrderBook) CancelOrder(order *types.Order) (*types.OrderCancellationConfirmation, error)

CancelOrder cancel an order that is active on an order book. Market and Order ID are validated, however the order must match the order on the book with respect to side etc. The caller will typically validate this by using a store, we should not trust that the external world can provide these values reliably.

func (*OrderBook) DeleteOrder 

func (b *OrderBook) DeleteOrder(
	order *types.Order,
) (*types.Order, error)

DeleteOrder remove a given order on a given side from the book.

func (*OrderBook) EnterAuction 

func (b *OrderBook) EnterAuction() []*types.Order

EnterAuction Moves the order book into an auction state.

func (*OrderBook) GetActivePeggedOrderIDs 

func (b *OrderBook) GetActivePeggedOrderIDs() []string

GetActivePeggedOrderIDs returns the order identifiers of all pegged orders in the order book that are not parked.

func (*OrderBook) GetAllLiquidityOrders added in v0.62.0 

func (b *OrderBook) GetAllLiquidityOrders() []*types.Order

func (*OrderBook) GetBestAskPrice 

func (b *OrderBook) GetBestAskPrice() (*num.Uint, error)

func (*OrderBook) GetBestBidPrice 

func (b *OrderBook) GetBestBidPrice() (*num.Uint, error)

func (*OrderBook) GetBestStaticAskPrice 

func (b *OrderBook) GetBestStaticAskPrice() (*num.Uint, error)

func (*OrderBook) GetBestStaticAskPriceAndVolume 

func (b *OrderBook) GetBestStaticAskPriceAndVolume() (*num.Uint, uint64, error)

func (*OrderBook) GetBestStaticBidPrice 

func (b *OrderBook) GetBestStaticBidPrice() (*num.Uint, error)

func (*OrderBook) GetBestStaticBidPriceAndVolume 

func (b *OrderBook) GetBestStaticBidPriceAndVolume() (*num.Uint, uint64, error)

func (*OrderBook) GetCloseoutPrice 

func (b *OrderBook) GetCloseoutPrice(volume uint64, side types.Side) (*num.Uint, error)

GetCloseoutPrice returns the exit price which would be achieved for a given volume and give side of the book.

func (*OrderBook) GetIndicativePrice 

func (b *OrderBook) GetIndicativePrice() (retprice *num.Uint)

GetIndicativePrice Calculates the indicative price of the order book without modifying the order book state.

func (*OrderBook) GetIndicativePriceAndVolume 

func (b *OrderBook) GetIndicativePriceAndVolume() (retprice *num.Uint, retvol uint64, retside types.Side)

GetIndicativePriceAndVolume Calculates the indicative price and volume of the order book without modifying the order book state.

func (*OrderBook) GetIndicativeTrades 

func (b *OrderBook) GetIndicativeTrades() ([]*types.Trade, error)

func (*OrderBook) GetLastTradedPrice added in v0.72.0 

func (b *OrderBook) GetLastTradedPrice() *num.Uint

func (*OrderBook) GetLiquidityOrders added in v0.62.0 

func (b *OrderBook) GetLiquidityOrders(party string) []*types.Order

func (*OrderBook) GetOrderBookLevelCount added in v0.63.0 

func (b *OrderBook) GetOrderBookLevelCount() uint64

GetOrderBookLevelCount returns the number of levels in the book.

func (*OrderBook) GetOrderByID 

func (b *OrderBook) GetOrderByID(orderID string) (*types.Order, error)

GetOrderByID returns order by its ID (IDs are not expected to collide within same market).

func (*OrderBook) GetOrdersPerParty 

func (b *OrderBook) GetOrdersPerParty(party string) []*types.Order

func (*OrderBook) GetPeggedOrdersCount added in v0.63.0 

func (b *OrderBook) GetPeggedOrdersCount() uint64

func (*OrderBook) GetState 

func (b *OrderBook) GetState(key string) ([]byte, []types.StateProvider, error)

func (*OrderBook) GetTotalNumberOfOrders 

func (b *OrderBook) GetTotalNumberOfOrders() int64

GetTotalNumberOfOrders is a debug/testing function to return the total number of orders in the book.

func (*OrderBook) GetTotalVolume 

func (b *OrderBook) GetTotalVolume() int64

GetTotalVolume is a debug/testing function to return the total volume in the order book.

func (*OrderBook) GetTrades 

func (b *OrderBook) GetTrades(order *types.Order) ([]*types.Trade, error)

GetTrades returns the trades a given order generates if we were to submit it now this is used to calculate fees, perform price monitoring, etc...

func (*OrderBook) Hash 

func (b *OrderBook) Hash() []byte

func (OrderBook) InAuction 

func (b OrderBook) InAuction() bool

func (*OrderBook) Keys 

func (b *OrderBook) Keys() []string

func (*OrderBook) LeaveAuction 

func (b *OrderBook) LeaveAuction(at time.Time) ([]*types.OrderConfirmation, []*types.Order, error)

LeaveAuction Moves the order book back into continuous trading state.

func (*OrderBook) LoadState 

func (b *OrderBook) LoadState(_ context.Context, payload *types.Payload) ([]types.StateProvider, error)

func (OrderBook) Namespace 

func (b OrderBook) Namespace() types.SnapshotNamespace

func (*OrderBook) PrintState 

func (b *OrderBook) PrintState(types string)

PrintState prints the actual state of the book. this should be use only in debug / non production environment as it rely a lot on logging.

func (*OrderBook) ReSubmitSpecialOrders added in v0.62.0 

func (b *OrderBook) ReSubmitSpecialOrders(order *types.Order)

func (*OrderBook) ReloadConf 

func (b *OrderBook) ReloadConf(cfg Config)

ReloadConf is used in order to reload the internal configuration of the OrderBook.

func (*OrderBook) RemoveDistressedOrders 

func (b *OrderBook) RemoveDistressedOrders(
	parties []events.MarketPosition,
) ([]*types.Order, error)

RemoveDistressedOrders remove from the book all order holding distressed positions.

func (*OrderBook) RemoveOrder 

func (b *OrderBook) RemoveOrder(id string) (*types.Order, error)

RemoveOrder takes the order off the order book.

func (*OrderBook) ReplaceOrder 

func (b *OrderBook) ReplaceOrder(rm, rpl *types.Order) (*types.OrderConfirmation, error)

func (*OrderBook) RestoreWithMarketPriceFactor added in v0.65.0 

func (b *OrderBook) RestoreWithMarketPriceFactor(priceFactor *num.Uint)

RestoreWithMarketPriceFactor takes the given market price factor and updates all the OriginalPrices in the orders accordingly.

func (*OrderBook) Settled 

func (b *OrderBook) Settled() []*types.Order

func (*OrderBook) StopSnapshots 

func (b *OrderBook) StopSnapshots()

func (*OrderBook) Stopped 

func (b *OrderBook) Stopped() bool

func (*OrderBook) SubmitOrder 

func (b *OrderBook) SubmitOrder(order *types.Order) (*types.OrderConfirmation, error)

SubmitOrder Add an order and attempt to uncross the book, returns a TradeSet protobuf message object.

type OrderBookSide 

type OrderBookSide struct {
	// contains filtered or unexported fields
}

OrderBookSide represent a side of the book, either Sell or Buy.

func (*OrderBookSide) BestPriceAndVolume 

func (s *OrderBookSide) BestPriceAndVolume() (*num.Uint, uint64, error)

BestPriceAndVolume returns the top of book price and volume returns an error if the book is empty.

func (*OrderBookSide) BestStaticPrice 

func (s *OrderBookSide) BestStaticPrice() (*num.Uint, error)

BestStaticPrice returns the top of book price for non pegged orders We do not keep count of the volume which makes this slightly quicker returns an error if the book is empty.

func (*OrderBookSide) BestStaticPriceAndVolume 

func (s *OrderBookSide) BestStaticPriceAndVolume() (*num.Uint, uint64, error)

BestStaticPriceAndVolume returns the top of book price for non pegged orders returns an error if the book is empty.

func (*OrderBookSide) ExtractOrders 

func (s *OrderBookSide) ExtractOrders(price *num.Uint, volume uint64, removeOrders bool) []*types.Order

ExtractOrders extracts the orders from the top of the book until the volume amount is hit, if removeOrders is set to True then the relevant orders also get removed.

func (*OrderBookSide) GetVolume 

func (s *OrderBookSide) GetVolume(price *num.Uint) (uint64, error)

GetVolume returns the volume at the given pricelevel.

func (*OrderBookSide) Hash 

func (s *OrderBookSide) Hash() []byte

func (*OrderBookSide) RemoveOrder 

func (s *OrderBookSide) RemoveOrder(o *types.Order) (*types.Order, error)

RemoveOrder will remove an order from the book.

type PriceLevel 

type PriceLevel struct {
	// contains filtered or unexported fields
}

PriceLevel represents all the Orders placed at a given price.

func NewPriceLevel 

func NewPriceLevel(price *num.Uint) *PriceLevel

NewPriceLevel instantiate a new PriceLevel.

Source Files

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