from __future__ import annotations

from typing import Any, Dict


class GraphRegistry:
    def __init__(self) -> None:
        self._contracts: Dict[str, Any] = {}

    def register_contract(self, name: str, contract: Any) -> None:
        self._contracts[name] = contract

    def get_contract(self, name: str) -> Any | None:
        return self._contracts.get(name)

    def list_contracts(self) -> Dict[str, Any]:
        return dict(self._contracts)