"""Core data contracts for BeVault MVP (toy DSL seeds)."""
from __future__ import annotations
from dataclasses import dataclass, field
from typing import List, Optional
import time


@dataclass
class LocalArbProblem:
    asset: str
    objective: str  # e.g., 'min_cost', 'maximize_profit'
    risk_budget: float
    constraints: dict = field(default_factory=dict)


@dataclass
class SharedSignals:
    asset: str
    price: float
    latency_ms: float
    timestamp: float = field(default_factory=lambda: time.time())
    metadata: dict = field(default_factory=dict)


@dataclass
class HedgeDelta:
    asset: str
    hedge_size: float
    timestamp: float = field(default_factory=lambda: time.time())
    policy_tag: str = "default"
    signature: Optional[str] = None


@dataclass
class AuditLog:
    events: List[str] = field(default_factory=list)
    entry_ts: float = field(default_factory=lambda: time.time())


@dataclass
class PrivacyBudget:
    asset: str
    remaining: float
    reset_epoch: float = field(default_factory=lambda: time.time())


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