Added GetTimeSent to message

README.md

@@ -807,16 +807,29 @@ message.Delay(<time.Duration>);
 ```
 
 ### Get headers 
+
 Get headers per message
+
 ```go
 headers := msg.GetHeaders()
 ```
 
 ### Get message sequence number
+
 Get message sequence number
+
 ```go
 sequenceNumber, err := msg.GetSequenceNumber()
 ```
+
+### Get message time sent
+
+Get message time sent
+
+```go
+timeSent, err := msg.GetTimeSent()
+```
+
 ### Destroying a Consumer
 
 ```go

consumer.go

@@ -27,8 +27,8 @@
 
 	"github.com/nats-io/nats.go"
 	"github.com/nats-io/nats.go/jetstream"
 	"google.golang.org/protobuf/encoding/protojson"
 	"google.golang.org/protobuf/proto"
 	"google.golang.org/protobuf/types/dynamicpb"
 )
 
@@ -184,6 +184,21 @@
 	return seq, nil
 }
 
+// Msg.GetTimeSent - get message's time sent
+func (m *Msg) GetTimeSent() (time.Time, error) {
+	if jsMsg, ok := m.msg.(jetstream.Msg); ok {
+		md, err := jsMsg.Metadata()
+		if err != nil {
+			return time.Time{}, errors.New("message format is not supported")
+		}
+		return md.Timestamp, nil
+	} else if _, ok := m.msg.(*nats.Msg); ok {
+		return time.Now(), nil
+	} else {
+		return time.Time{}, errors.New("message format is not supported")
+	}
+}
+
 // Msg.Ack - ack the message.
 func (m *Msg) Ack() error {
 	var err error