from __future__ import annotations

from typing import Dict


class RBAC:
    def __init__(self):
        self.roles: Dict[str, set[str]] = {}

    def add_role(self, role: str, permissions: list[str]) -> None:
        self.roles[role] = set(permissions)

    def has_permission(self, role: str, perm: str) -> bool:
        return perm in self.roles.get(role, set())