Minor: mark reducer arguments as Readonly

ts/state/ducks/calling.ts

@@ -914,7 +914,7 @@ function getExistingPeekInfo(
 }
 
 function removeConversationFromState(
-  state: CallingStateType,
+  state: Readonly<CallingStateType>,
   conversationId: string
 ): CallingStateType {
   return {
@@ -926,8 +926,8 @@ function removeConversationFromState(
 }
 
 export function reducer(
-  state: CallingStateType = getEmptyState(),
+  state: Readonly<CallingStateType> = getEmptyState(),
-  action: CallingActionType
+  action: Readonly<CallingActionType>
 ): CallingStateType {
   const { callsByConversation } = state;
 

ts/state/ducks/conversations.ts

@@ -811,8 +811,8 @@ function hasMessageHeightChanged(
 }
 
 export function reducer(
-  state: ConversationsStateType = getEmptyState(),
+  state: Readonly<ConversationsStateType> = getEmptyState(),
-  action: ConversationActionType
+  action: Readonly<ConversationActionType>
 ): ConversationsStateType {
   if (action.type === 'CONVERSATION_ADDED') {
     const { payload } = action;

ts/state/ducks/emojis.ts

@@ -62,8 +62,8 @@ function getEmptyState(): EmojisStateType {
 }
 
 export function reducer(
-  state: EmojisStateType = getEmptyState(),
+  state: Readonly<EmojisStateType> = getEmptyState(),
-  action: EmojisActionType
+  action: Readonly<EmojisActionType>
 ): EmojisStateType {
   if (action.type === 'emojis/USE_EMOJI') {
     const { payload } = action;

ts/state/ducks/expiration.ts

@@ -40,8 +40,8 @@ function getEmptyState(): ExpirationStateType {
 }
 
 export function reducer(
-  state: ExpirationStateType = getEmptyState(),
+  state: Readonly<ExpirationStateType> = getEmptyState(),
-  action: ExpirationActionType
+  action: Readonly<ExpirationActionType>
 ): ExpirationStateType {
   if (action.type === HYDRATE_EXPIRATION_STATUS) {
     return {

ts/state/ducks/items.ts

@@ -109,8 +109,8 @@ function getEmptyState(): ItemsStateType {
 }
 
 export function reducer(
-  state: ItemsStateType = getEmptyState(),
+  state: Readonly<ItemsStateType> = getEmptyState(),
-  action: ItemsActionType
+  action: Readonly<ItemsActionType>
 ): ItemsStateType {
   if (action.type === 'items/PUT_EXTERNAL') {
     const { payload } = action;

ts/state/ducks/network.ts

@@ -83,8 +83,8 @@ function getEmptyState(): NetworkStateType {
 }
 
 export function reducer(
-  state: NetworkStateType = getEmptyState(),
+  state: Readonly<NetworkStateType> = getEmptyState(),
-  action: NetworkActionType
+  action: Readonly<NetworkActionType>
 ): NetworkStateType {
   if (action.type === CHECK_NETWORK_STATUS) {
     const { isOnline, socketStatus } = action.payload;

ts/state/ducks/safetyNumber.ts

@@ -163,8 +163,8 @@ function getEmptyState(): SafetyNumberStateType {
 }
 
 export function reducer(
-  state: SafetyNumberStateType = getEmptyState(),
+  state: Readonly<SafetyNumberStateType> = getEmptyState(),
-  action: SafetyNumberActionType
+  action: Readonly<SafetyNumberActionType>
 ): SafetyNumberStateType {
   if (action.type === TOGGLE_VERIFIED_PENDING) {
     const { contact } = action.payload;

ts/state/ducks/search.ts

@@ -337,8 +337,8 @@ function getEmptyState(): SearchStateType {
 }
 
 export function reducer(
-  state: SearchStateType = getEmptyState(),
+  state: Readonly<SearchStateType> = getEmptyState(),
-  action: SearchActionType
+  action: Readonly<SearchActionType>
 ): SearchStateType {
   if (action.type === 'SHOW_ARCHIVED_CONVERSATIONS') {
     return getEmptyState();

ts/state/ducks/stickers.ts

@@ -373,8 +373,8 @@ function getEmptyState(): StickersStateType {
 }
 
 export function reducer(
-  state: StickersStateType = getEmptyState(),
+  state: Readonly<StickersStateType> = getEmptyState(),
-  action: StickersActionType
+  action: Readonly<StickersActionType>
 ): StickersStateType {
   if (action.type === 'stickers/STICKER_PACK_ADDED') {
     // ts complains due to `stickers: {}` being overridden by the payload

ts/state/ducks/updates.ts

@@ -111,8 +111,8 @@ function getEmptyState(): UpdatesStateType {
 }
 
 export function reducer(
-  state: UpdatesStateType = getEmptyState(),
+  state: Readonly<UpdatesStateType> = getEmptyState(),
-  action: UpdatesActionType
+  action: Readonly<UpdatesActionType>
 ): UpdatesStateType {
   if (action.type === SHOW_UPDATE_DIALOG) {
     return {

ts/state/ducks/user.ts

@@ -83,8 +83,8 @@ function getEmptyState(): UserStateType {
 }
 
 export function reducer(
-  state: UserStateType = getEmptyState(),
+  state: Readonly<UserStateType> = getEmptyState(),
-  action: UserActionType
+  action: Readonly<UserActionType>
 ): UserStateType {
   if (!state) {
     return getEmptyState();