Refactor

src/remote/activitypub/act/undo/index.ts

@@ -0,0 +1,15 @@
+import unfollow from './follow';
+
+export default async (actor, activity): Promise<void> => {
+	if ('actor' in activity && actor.account.uri !== activity.actor) {
+		throw new Error('invalid actor');
+	}
+
+	switch (activity.object.type) {
+		case 'Follow':
+			unfollow(actor, activity.object);
+			break;
+	}
+
+	return null;
+};