From fcbeb95cdd7f2b7d58731392d707183b311863ff Mon Sep 17 00:00:00 2001
From: Eduardo San Martin Morote <posva13@gmail.com>
Date: Thu, 29 Apr 2021 14:45:02 +0200
Subject: [PATCH] feat: mark getters as readonly

---
 src/store.ts             | 1 +
 src/types.ts             | 5 ++++-
 test-dts/store.test-d.ts | 3 +++
 3 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/store.ts b/src/store.ts
index cfe8a3c7..fe96a924 100644
--- a/src/store.ts
+++ b/src/store.ts
@@ -229,6 +229,7 @@ function buildStoreToUse<
 
   const computedGetters: StoreWithGetters<G> = {} as StoreWithGetters<G>
   for (const getterName in getters) {
+    // @ts-ignore: it's only readonly for the users
     computedGetters[getterName] = computed(() => {
       setActivePinia(pinia)
       // eslint-disable-next-line @typescript-eslint/no-use-before-define
diff --git a/src/types.ts b/src/types.ts
index ee310210..bd1ed9ad 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -122,7 +122,10 @@ export type StoreWithActions<A> = {
  * @internal
  */
 export type StoreWithGetters<G> = {
-  [k in keyof G]: G[k] extends (this: infer This, store?: any) => infer R
+  readonly [k in keyof G]: G[k] extends (
+    this: infer This,
+    store?: any
+  ) => infer R
     ? R
     : never
 }
diff --git a/test-dts/store.test-d.ts b/test-dts/store.test-d.ts
index e1a02adf..fcb4bee3 100644
--- a/test-dts/store.test-d.ts
+++ b/test-dts/store.test-d.ts
@@ -33,6 +33,9 @@ expectType<'on' | 'off'>(store.a)
 // @ts-expect-error
 store.nonExistant
 
+// @ts-expect-error
+store.upper = 'thing'
+
 // @ts-expect-error
 store.nonExistant.stuff
 
-- 
2.47.2