literal-types-vuex.ts

module1.actions.ts

interface Module1Actions {
  actionA1(context: Module1ActionContext, payload: ActionA1Payload): void
  actionA2(context: Module1ActionContext, payload: ActionA2Payload): void
}

type Module1ActionContext = {
  dispatch<K extends keyof Module1Actions>(
     actionType: K,
     payload: Parameters<Module1Actions[K]>[1],
     options?: DispatchOptions,
  ): ReturnType<Module1Actions[K]>;
  commit<K extends keyof Module1Mutations>(
     actionType: K,
     payload Parameters<Module1Mutations[K]>[1]]
  ): ReturnType<Module1Mutations[K]>;
}