from __future__ import annotations

from typing import Dict, List, Optional, Any
from datetime import datetime
from pydantic import BaseModel


class MarketSignal(BaseModel):
    venue_id: str
    symbol: str
    timestamp: datetime
    features: Dict[str, float]


class AggregatedSignal(BaseModel):
    venues: List[str]
    feature_vector: Dict[str, float]
    privacy_budget_used: float
    nonce: str
    merkle_proof: Optional[str] = None


class PlanDelta(BaseModel):
    version: int
    timestamp: datetime
    delta: Dict[str, Any]


class PrivacyBudget(BaseModel):
    total: float
    consumed: float
    remaining: float


class AuditLog(BaseModel):
    entries: List[str]
    last_updated: Optional[datetime] = None


class ProvenanceProof(BaseModel):
    venue_id: str
    timestamp: datetime
    merkle_root: str
    proof: str