feat(ext/kv): return versionstamp from set/commit (#18512)

This commit updates the `Deno.Kv` API to return the new commited
versionstamp for the mutated data from `db.set` and `ao.commit`. This is
returned in the form of a `Deno.KvCommitResult` object that has a
`versionstamp` property.

1 files changed, 10 insertions, 1 deletions

diff --git a/ext/kv/interface.rs b/ext/kv/interface.rs
index 6e520b9c5..31b7638b4 100644
--- a/ext/kv/interface.rs
+++ b/ext/kv/interface.rs
@@ -31,7 +31,10 @@ pub trait Database {
     options: SnapshotReadOptions,
   ) -> Result<Vec<ReadRangeOutput>, AnyError>;
 
-  async fn atomic_write(&self, write: AtomicWrite) -> Result<bool, AnyError>;
+  async fn atomic_write(
+    &self,
+    write: AtomicWrite,
+  ) -> Result<Option<CommitResult>, AnyError>;
 }
 
 /// Options for a snapshot read.
@@ -304,3 +307,9 @@ impl MutationKind {
     }
   }
 }
+
+/// The result of a successful commit of an atomic write operation.
+pub struct CommitResult {
+  /// The new versionstamp of the data that was committed.
+  pub versionstamp: Versionstamp,
+}