/**
 * In-process cache of roleName -> permission keys, avoiding a disk read on every
 * single request. Hydrated once at server bootstrap (AuthSeeder) and kept in sync
 * whenever a new role is created (AuthService.createRole).
 */
declare class PermissionChecker {
    private static instance;
    private readonly rolePermissions;
    static getInstance(): PermissionChecker;
    setRolePermissions(roleName: string, permissions: string[]): void;
    deleteRole(roleName: string): void;
    hydrate(roles: {
        roleName: string;
        permissions: string[];
    }[]): void;
    getPermissionsForRole(roleName: string): string[];
    roleHasPermission(roleName: string, permissionKey: string): boolean;
    roleExists(roleName: string): boolean;
    listRoleNames(): string[];
}
declare const _default: PermissionChecker;
export default _default;