epoch tag in sync

1 files changed, 15 insertions, 2 deletions

diff --git a/src/transport/wire.rs b/src/transport/wire.rs
index 3f7736d..d1ac14d 100644
--- a/src/transport/wire.rs
+++ b/src/transport/wire.rs
@@ -14,7 +14,7 @@ use super::{EncodedMessage, MessageKind, ParsedMessage};
 
 /// The wire format's version, the first byte of every payload. Bump it with every change
 /// to a message type or a codec (`golden_bytes` fails then).
-pub(crate) const VERSION: u8 = 29;
+pub(crate) const VERSION: u8 = 30;
 
 /// What the second byte of a payload says.
 fn tag(kind: MessageKind) -> u8 {
@@ -166,6 +166,19 @@ pub(crate) mod codec {
         }
     }
 
+    /// 8 bytes (`EpochTag::prefix`).
+    pub(crate) mod bytes8 {
+        use super::*;
+
+        pub(crate) fn serialize<S: Serializer>(value: &[u8; 8], s: S) -> Result<S::Ok, S::Error> {
+            Bytes::new(value).serialize(s)
+        }
+
+        pub(crate) fn deserialize<'de, D: Deserializer<'de>>(d: D) -> Result<[u8; 8], D::Error> {
+            fixed(&ByteBuf::deserialize(d)?, "an epoch tag")
+        }
+    }
+
     /// A 64-byte signature.
     pub(crate) mod bytes64 {
         use super::*;
@@ -401,7 +414,7 @@ pub(crate) fn samples() -> Vec<ParsedMessage> {
             sender_run_id: [6; 16],
         }),
         ParsedMessage::Sync(SyncEnvelope {
-            epoch,
+            epoch: crate::transport::EpochTag::of(epoch),
             epoch_seq: 1,
             body: SyncBody::Delta(DeltaSpec {
                 from: Vec::new(),