from __future__ import annotations

from dataclasses import dataclass
from datetime import datetime


@dataclass
class LocalArbProblem:
    id: str
    venue: str
    asset_pair: str
    target_misprice: float
    max_exposure: float
    latency_budget_ms: int


@dataclass
class SharedSignals:
    version: int
    price_delta: float
    cross_venue_corr: float
    liquidity: float


@dataclass
class DualVariables:
    """Federated optimization multipliers (shadow prices)."""
    multipliers: dict
    version: int = 1


@dataclass
class AuditLog:
    """Governance or arbitration audit log entry."""
    entry: str
    signer: str
    timestamp: datetime
    contract_id: str
    version: int = 1


@dataclass
class PrivacyBudget:
    """Privacy budget token for a data-sharing signal."""
    limit: float
    remaining: float
    expiration: datetime


__all__ = ["LocalArbProblem", "SharedSignals", "DualVariables", "AuditLog", "PrivacyBudget"]

__all__ = ["LocalArbProblem", "SharedSignals"]