generator-nest-js-boilerplate/generators/prisma-casl/templates/postgresql/jwt/src/casl-ability/policy-handler.ts

This generator will help you to build your own Nest.js Mongodb API using TypeScript 4

import { SetMetadata } from '@nestjs/common';
import { AppAbility } from './casl-ability.factory';

interface IPolicyHandler {
  handle(ability: AppAbility): boolean;
}

type PolicyHandlerCallback = (ability: AppAbility) => boolean;

export type PolicyHandler = IPolicyHandler | PolicyHandlerCallback;

export const CHECK_POLICIES_KEY = 'check_policy';
export const CheckPolicies = (...handlers: PolicyHandler[]) => SetMetadata(CHECK_POLICIES_KEY, handlers);