"""Graph-of-Contracts (GoC) placeholders for adapters and data schemas."""

from dataclasses import dataclass
from typing import Dict


@dataclass
class ContractMetadata:
    name: str
    version: str
    endpoint: str | None = None


class GraphOfContracts:
    def __init__(self):
        self._registry: Dict[str, ContractMetadata] = {}

    def register(self, key: str, meta: ContractMetadata):
        self._registry[key] = meta

    def get(self, key: str) -> ContractMetadata | None:
        return self._registry.get(key)