adding project logic

src/domain/order.go

@@ -0,0 +1,32 @@
+// Package domain defines all the domain models
+package domain
+
+import (
+	"time"
+
+	"github.com/shopspring/decimal"
+)
+
+// Order represents a FIX NewOrderSingle message received from a client.
+type Order struct {
+	ClOrdID    string
+	Symbol     string
+	Side       string
+	OrdType    string
+	OrderQty   decimal.Decimal
+	Price      decimal.Decimal
+	SessionID  string
+	ReceivedAt time.Time
+}
+
+// OrderStore is the port for persisting and retrieving orders.
+type OrderStore interface {
+	SaveOrder(order Order)
+	GetOrders() []Order
+	GetOrderByClOrdID(id string) (Order, bool)
+}
+
+// FIXSender is the port for sending FIX messages back to clients.
+type FIXSender interface {
+	SendQuote(clOrdID, quoteID, symbol, currency string, bidPx, offerPx, bidSize, offerSize decimal.Decimal) error
+}