feat: add hash and toJson methods

internal/pkg/model/typeMethods.go

@@ -0,0 +1,25 @@
+package model
+
+import (
+	"crypto/sha256"
+	"encoding/json"
+	"fmt"
+)
+
+func (b *BeaconEvent) Hash() []byte {
+	rBatt := (b.Battery / 10) * 10
+	c := fmt.Sprintf("%d%d%s%s%s", rBatt, b.Event, b.ID, b.Name, b.Type)
+	h := sha256.New()
+	h.Write([]byte(c))
+	bs := h.Sum(nil)
+
+	return bs
+}
+
+func (b BeaconEvent) ToJSON() ([]byte, error) {
+	eData, err := json.Marshal(b)
+	if err != nil {
+		return nil, err
+	}
+	return eData, nil
+}