Expose db change batches over control

crates/geth/tests/bootstrap.rs

@@ -463,6 +463,44 @@ fn db_add_and_status_register_local_db_metadata() {
         other => panic!("unexpected response: {other:?}"),
     }
 
+    let response = geth_node::handle_request(
+        &node,
+        geth_control::ControlRequest::DbChanges {
+            name: "notes".to_owned(),
+            after_db_version: None,
+            limit: 10,
+        },
+    )
+    .expect("db changes");
+    match response {
+        geth_control::ControlResponse::DbChanges { db, batch } => {
+            assert_eq!(db.name, "notes");
+            assert_eq!(batch.changes.len(), 1);
+            assert_eq!(batch.max_db_version, Some(3));
+            assert_eq!(batch.changes[0].table_name, "notes");
+            assert_eq!(batch.changes[0].column_id, "body");
+            assert!(batch.schema_metadata.contains("schema_hash="));
+        }
+        other => panic!("unexpected response: {other:?}"),
+    }
+
+    let response = geth_node::handle_request(
+        &node,
+        geth_control::ControlRequest::DbChanges {
+            name: "notes".to_owned(),
+            after_db_version: Some(3),
+            limit: 10,
+        },
+    )
+    .expect("db changes after latest");
+    match response {
+        geth_control::ControlResponse::DbChanges { batch, .. } => {
+            assert!(batch.changes.is_empty());
+            assert_eq!(batch.max_db_version, None);
+        }
+        other => panic!("unexpected response: {other:?}"),
+    }
+
     assert!(
         geth_node::handle_request(
             &node,