from __future__ import annotations
from dataclasses import dataclass, field
from typing import Dict


@dataclass
class GoCRegistry:
    """Lightweight Graph-of-Contracts registry placeholder.

    In a full system this would track versioned adapters/contracts and allow
    lookups by contract name and version. For MVP, we store simple mappings.
    """

    registry: Dict[str, str] = field(default_factory=dict)

    def register(self, name: str, versioned_contract: str) -> None:
        self.registry[name] = versioned_contract

    def get(self, name: str) -> str | None:
        return self.registry.get(name)