Move Reducer type to types file

Author: sandervspl

src/ducks/test/index.ts

@@ -5,8 +5,7 @@ import * as i from 'types';
 import { HYDRATE } from 'next-redux-wrapper';
 import { action } from 'typesafe-actions';
 
-// Duck name, State struct type, typeof actions object
-type Reducer = i.Reducer<'test', i.TestState, typeof testActions>;
+import { TestReducer } from './types';
 
 export const testActions = {
   load: () => action('test/GET'),
@@ -20,7 +19,7 @@ const initialState: i.TestState = {
   loading: false,
 };
 
-const reducer: Reducer = (state = initialState, action) => {
+const reducer: TestReducer = (state = initialState, action) => {
   switch (action.type) {
     // HYDRATE is explained here:
     // https://github.com/kirill-konshin/next-redux-wrapper#state-reconciliation-during-hydration

src/ducks/test/types.ts

@@ -1,9 +1,14 @@
 import * as i from 'types';
 
+import { testActions } from '.';
+
 export type TestState = {
   data: boolean | null;
   error: boolean;
   loading: boolean;
 };
 
+// Duck name, State struct type, typeof actions object
+export type TestReducer = i.Reducer<'test', i.TestState, typeof testActions>;
+
 export type GetData = i.BaseThunkAction<() => Promise<void>>;

src/types/redux.ts

@@ -36,14 +36,13 @@ type HydrateAction<N extends string, S> = {
 };
 
 export type Reducer<
-  N extends string,
-  S extends i.AnyObject,
-  A extends Record<string, (...args: any) => EmptyAction<any> | PayloadAction<any, any> | PayloadMetaAction<any, any, any>>
-> =
-  (
-    state: S,
-    action: HydrateAction<N, S> | ActionType<A>,
-  ) => S;
+  Name extends string,
+  State extends i.AnyObject,
+  Actions extends Record<string, (...args: any) => EmptyAction<any> | PayloadAction<any, any> | PayloadMetaAction<any, any, any>>
+> = (
+  state: State,
+  action: HydrateAction<Name, State> | ActionType<Actions>,
+) => State;
 
 /** Thunk action type with pre-filled generics. */
 type ExtraArgument = i.AnyObject;