1 files changed, 52 insertions, 0 deletions
diff --git a/third_party/rust/sync15/src/engine/changeset.rs b/third_party/rust/sync15/src/engine/changeset.rs
new file mode 100644
index 0000000000..c5a4e65fcd
--- /dev/null
+++ b/third_party/rust/sync15/src/engine/changeset.rs
@@ -0,0 +1,52 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use crate::bso::{IncomingBso, OutgoingBso};
+use crate::{CollectionName, ServerTimestamp};
+
+// Incoming and Outgoing changesets are almost identical except for the timestamp.
+// Separate types still helps avoid confusion with that timestamp, so they're split.
+#[derive(Debug)]
+pub struct IncomingChangeset {
+    pub changes: Vec<IncomingBso>,
+    /// The server timestamp of the collection.
+    pub timestamp: ServerTimestamp,
+    pub collection: CollectionName,
+}
+
+impl IncomingChangeset {
+    #[inline]
+    pub fn new(collection: CollectionName, timestamp: ServerTimestamp) -> Self {
+        Self::new_with_changes(collection, timestamp, Vec::new())
+    }
+
+    #[inline]
+    pub fn new_with_changes(
+        collection: CollectionName,
+        timestamp: ServerTimestamp,
+        changes: Vec<IncomingBso>,
+    ) -> Self {
+        Self {
+            changes,
+            timestamp,
+            collection,
+        }
+    }
+}
+
+#[derive(Debug)]
+pub struct OutgoingChangeset {
+    pub changes: Vec<OutgoingBso>,
+    pub collection: CollectionName,
+}
+
+impl OutgoingChangeset {
+    #[inline]
+    pub fn new(collection: CollectionName, changes: Vec<OutgoingBso>) -> Self {
+        Self {
+            collection,
+            changes,
+        }
+    }
+}