Add event struct to library

Signed-off-by: Andy Lo-A-Foe <andy.loafoe@gmail.com>

Author: loafoe

notification/event.go

@@ -0,0 +1,20 @@
+package notification
+
+import (
+	"time"
+)
+
+// Event is an Amazon SNS HTTP message on which HSDP Notification is currently based on
+type Event struct {
+	Type             string    `json:"Type"`
+	MessageID        string    `json:"MessageId"`
+	Token            string    `json:"Token"`
+	TopicARN         string    `json:"TopicArn"`
+	Message          string    `json:"Message"`
+	Subject          string    `json:"Subject,omitempty"`
+	SubscribeURL     string    `json:"SubscribeURL,omitempty"`
+	Timestamp        time.Time `json:"Timestamp"`
+	SignatureVersion string    `json:"SignatureVersion"`
+	Signature        string    `json:"Signature"`
+	SigningCertURL   string    `json:"SigningCertURL"`
+}