Don't strip seed

packages/excalidraw/change.ts

@@ -804,10 +804,8 @@ export class AppStateChange implements Change<AppState> {
 }
 
 // CFDO: consider adding here (nonnullable) version & versionNonce & updated & seed (so that we have correct versions when recunstructing from remote)
-type ElementPartial<T extends ExcalidrawElement = ExcalidrawElement> = Omit<
-  ElementUpdate<Ordered<T>>,
-  "seed"
->;
+type ElementPartial<T extends ExcalidrawElement = ExcalidrawElement> =
+  ElementUpdate<Ordered<T>>;
 
 type ElementsChangeOptions = {
   shouldRedistribute: boolean;
@@ -1605,8 +1603,7 @@ export class ElementsChange implements Change<SceneElementsMap> {
   private static stripIrrelevantProps(
     partial: Partial<OrderedExcalidrawElement>,
   ): ElementPartial {
-    const { id, updated, version, versionNonce, seed, ...strippedPartial } =
-      partial;
+    const { id, updated, version, versionNonce, ...strippedPartial } = partial;
 
     return strippedPartial;
   }

packages/excalidraw/tests/history.test.tsx

@@ -64,8 +64,45 @@ const checkpoint = (name: string) => {
     ...strippedAppState
   } = h.state;
   expect(strippedAppState).toMatchSnapshot(`[${name}] appState`);
-  expect(h.history.undoStack).toMatchSnapshot(`[${name}] undo stack`);
-  expect(h.history.redoStack).toMatchSnapshot(`[${name}] redo stack`);
+
+  const stripSeed = (deltas: Record<string, { deleted: any; inserted: any }>) =>
+    Object.entries(deltas).reduce((acc, curr) => {
+      const { inserted, deleted, ...rest } = curr[1];
+
+      delete inserted.seed;
+      delete deleted.seed;
+
+      acc[curr[0]] = {
+        inserted,
+        deleted,
+        ...rest,
+      };
+
+      return acc;
+    }, {} as Record<string, any>);
+
+  expect(
+    h.history.undoStack.map((x) => ({
+      ...x,
+      elementsChange: {
+        ...x.elementsChange,
+        added: stripSeed(x.elementsChange.added),
+        removed: stripSeed(x.elementsChange.updated),
+        updated: stripSeed(x.elementsChange.removed),
+      },
+    })),
+  ).toMatchSnapshot(`[${name}] undo stack`);
+  expect(
+    h.history.redoStack.map((x) => ({
+      ...x,
+      elementsChange: {
+        ...x.elementsChange,
+        added: stripSeed(x.elementsChange.added),
+        removed: stripSeed(x.elementsChange.updated),
+        updated: stripSeed(x.elementsChange.removed),
+      },
+    })),
+  ).toMatchSnapshot(`[${name}] redo stack`);
   expect(h.elements.length).toMatchSnapshot(`[${name}] number of elements`);
   h.elements
     .map(({ seed, versionNonce, ...strippedElement }) => strippedElement)