alert service

internal/entities/alert.go

@@ -4,9 +4,17 @@ import "github.com/shopspring/decimal"
 
 type AlertID string
 
+type AlertCondition string
+
+const (
+	AlertConditionAbove AlertCondition = "above" // trigger when price rises to target
+	AlertConditionBelow AlertCondition = "below" // trigger when price drops to target
+)
+
 type Alert struct {
 	ID         AlertID
 	UserID     UserID
 	Price      decimal.Decimal
+	Condition  AlertCondition
 	Instrument Instrument
 }