1 files changed, 29 insertions, 0 deletions
diff --git a/protocol/messages.go b/protocol/messages.go
new file mode 100644
index 0000000..d8f5697
--- /dev/null
+++ b/protocol/messages.go
@@ -0,0 +1,29 @@
+package protocol
+
+import (
+	"encoding/json"
+	"time"
+)
+
+type TimeStamp time.Time
+
+func (t *TimeStamp) UnmarshalJSON(data []byte) error {
+	var ts int64
+	err := json.Unmarshal(data, &ts)
+	if err != nil {
+		return err
+	}
+	*t = TimeStamp(time.UnixMilli(ts))
+	return nil
+}
+
+func (t TimeStamp) MarshalJSON() ([]byte, error) {
+	return json.Marshal(time.Time(t).UnixMilli())
+}
+
+type Observation struct {
+	Time    TimeStamp `json:"time"`
+	Target  Target    `json:"target"`
+	Online  bool      `json:"online"`
+	Latency uint32    `json:"latency"`
+}