feat: populate the persisted_data_checksums field with object checksums on write object / query write status responses

Google APIs · copybara-github · commit d73dfb3c3be5 · 2026-04-06T09:12:38.000-07:00
docs: improve wording around `object_checksums` in bidi write object requests

PiperOrigin-RevId: 895357062
diff --git a/google/storage/v2/storage.proto b/google/storage/v2/storage.proto
@@ -1461,6 +1461,9 @@ message WriteObjectResponse {
     // the upload has finalized.
     Object resource = 2;
   }
+
+  // If persisted_size is set, contains checksums of persisted data.
+  ObjectChecksums persisted_data_checksums = 3;
 }
 
 // Describes an attempt to append to an object, possibly over multiple requests.
@@ -1543,9 +1546,9 @@ message BidiWriteObjectRequest {
   }
 
   // Optional. Checksums for the complete object. If the checksums computed by
-  // the service don't match the specified checksums the call fails. Might only
-  // be provided in the first request or the last request (with finish_write
-  // set).
+  // the service don't match the specified checksums the call fails. May be
+  // provided in the last request (with finish_write set). For non-appendable
+  // objects only, may also be provided in the first request.
   ObjectChecksums object_checksums = 6 [(google.api.field_behavior) = OPTIONAL];
 
   // Optional. For each `BidiWriteObjectRequest` where `state_lookup` is `true`
@@ -1593,6 +1596,9 @@ message BidiWriteObjectResponse {
     Object resource = 2;
   }
 
+  // If persisted_size is set, contains checksums of persisted data.
+  ObjectChecksums persisted_data_checksums = 4;
+
   // An optional write handle that is returned periodically in response
   // messages. Clients should save it for later use in establishing a new stream
   // if a connection is interrupted.
@@ -1704,6 +1710,9 @@ message QueryWriteStatusResponse {
     // the upload has finalized.
     Object resource = 2;
   }
+
+  // If persisted_size is set, contains checksums of persisted data.
+  ObjectChecksums persisted_data_checksums = 3;
 }
 
 // Request message for [RewriteObject][google.storage.v2.Storage.RewriteObject].
