1 files changed, 12 insertions, 0 deletions
diff --git a/src/main/java/derms/net/runicast/Ack.java b/src/main/java/derms/net/runicast/Ack.java
new file mode 100644
index 0000000..df2211c
--- /dev/null
+++ b/src/main/java/derms/net/runicast/Ack.java
@@ -0,0 +1,12 @@
+package derms.net.runicast;
+
+import java.io.Serializable;
+
+/** A message acknowledgement. */
+class Ack implements Serializable {
+    final long seq; // The sequence number of the acknowledged message.
+
+    Ack(long seq) {
+        this.seq = seq;
+    }
+}