diff --git a/src/keys.ts b/src/keys.ts
new file mode 100644
index 0000000..f9f16b4
--- /dev/null
+++ b/src/keys.ts
@@ -0,0 +1,6 @@
+import type { InjectionKey, Ref } from "vue";
+
+export const isWarnKey: InjectionKey<Ref<boolean>> = Symbol("isWarnKey");
+export const nsfwKey: InjectionKey<Ref<boolean>> = Symbol("nsfwKey");
+export const showModalKey: InjectionKey<Function> = Symbol("showModalKey");
+export const modalResultKey: InjectionKey<Function> = Symbol("modalResultKey");