protocol

const (
	// CmdUnknown is the default unknown command.
	CmdUnknown CommandType = 0
	// CmdCreateMarket creates a new market.
	CmdCreateMarket CommandType = 1
	// CmdSuspendMarket suspends a market.
	CmdSuspendMarket CommandType = 2
	// CmdResumeMarket resumes a suspended market.
	CmdResumeMarket CommandType = 3
	// CmdUpdateConfig updates market configuration.
	CmdUpdateConfig CommandType = 4

	// CmdPlaceOrder places a new order.
	CmdPlaceOrder CommandType = 51
	// CmdCancelOrder cancels an existing order.
	CmdCancelOrder CommandType = 52
	// CmdAmendOrder modifies an existing order.
	CmdAmendOrder CommandType = 53
	// CmdUserEvent is a generic user event.
	CmdUserEvent CommandType = 100 // Generic User Event (e.g., EndOfBlock, Audit)
)

const (
	// LogTypeOpen is generated when an order is opened.
	LogTypeOpen LogType = "open"
	// LogTypeMatch is generated when a trade match occurs.
	LogTypeMatch LogType = "match"
	// LogTypeCancel is generated when an order is canceled.
	LogTypeCancel LogType = "cancel"
	// LogTypeAmend is generated when an order is amended.
	LogTypeAmend LogType = "amend"
	// LogTypeReject is generated when an order or command is rejected.
	LogTypeReject LogType = "reject"
	// LogTypeUser is generated for generic user events.
	LogTypeUser LogType = "user_event"
	// LogTypeAdmin is generated for successful management commands.
	LogTypeAdmin LogType = "admin_event"
)

const (
	// OrderBookStateRunning indicates the order book is active and accepting all trading operations.
	OrderBookStateRunning OrderBookState = 0
	// OrderBookStateSuspended indicates the order book is temporarily paused; only cancel operations are allowed.
	OrderBookStateSuspended OrderBookState = 1
	// OrderBookStateHalted indicates the order book is permanently stopped; no operations are allowed.
	OrderBookStateHalted OrderBookState = 2
)

const (
	// OrderTypeMarket represents a market order.
	OrderTypeMarket OrderType = "market"
	// OrderTypeLimit represents a limit order.
	OrderTypeLimit OrderType = "limit"
	// OrderTypeFOK represents a Fill-Or-Kill order.
	OrderTypeFOK OrderType = "fok" // Fill Or Kill
	// OrderTypeIOC represents an Immediate-Or-Cancel order.
	OrderTypeIOC OrderType = "ioc" // Immediate Or Cancel
	// OrderTypePostOnly represents a post-only (maker-only) order.
	OrderTypePostOnly OrderType = "post_only" // Maker only
	// OrderTypeCancel represents a cancellation request.
	OrderTypeCancel OrderType = "cancel" // The order has been canceled
)

const (
	// RejectReasonNone indicates no rejection.
	RejectReasonNone RejectReason = ""
	// RejectReasonNoLiquidity indicates no orders available to match.
	RejectReasonNoLiquidity RejectReason = "no_liquidity" // Market/IOC/FOK: No orders available to match
	// RejectReasonPriceMismatch indicates price does not meet requirements.
	RejectReasonPriceMismatch RejectReason = "price_mismatch" // IOC/FOK: Price does not meet requirements
	// RejectReasonInsufficientSize indicates order cannot be fully filled.
	RejectReasonInsufficientSize RejectReason = "insufficient_size" // FOK: Cannot be fully filled
	// RejectReasonPostOnlyMatch indicates PostOnly order would match immediately.
	RejectReasonPostOnlyMatch RejectReason = "post_only_match" // PostOnly: Would match immediately
	// RejectReasonDuplicateID indicates duplicate order ID.
	RejectReasonDuplicateID RejectReason = "duplicate_order_id"
	// RejectReasonOrderNotFound indicates order not found for cancel/amend.
	RejectReasonOrderNotFound RejectReason = "order_not_found"
	// RejectReasonInvalidPayload indicates invalid command payload.
	RejectReasonInvalidPayload RejectReason = "invalid_payload"

	// RejectReasonMarketNotFound is returned when the target market does not exist.
	RejectReasonMarketNotFound RejectReason = "market_not_found"
	// RejectReasonMarketAlreadyExists is returned when the market ID is already in use.
	RejectReasonMarketAlreadyExists RejectReason = "market_already_exists"
	// RejectReasonMarketSuspended is returned when the market is suspended.
	RejectReasonMarketSuspended RejectReason = "market_suspended"
	// RejectReasonMarketHalted is returned when the market is permanently halted.
	RejectReasonMarketHalted RejectReason = "market_halted"
	// RejectReasonUnauthorized is returned when the operator is not authorized.
	RejectReasonUnauthorized RejectReason = "unauthorized"
)

const (
	// SideBuy represents the buy side.
	SideBuy Side = 1
	// SideSell represents the sell side.
	SideSell Side = 2
)