/**
 * Proxy Usage Statistics
 * Tracks per-account request counts, token usage, and error rates.
 * In-memory only — resets on proxy restart.
 */
import type { AccountStats, ProxyStats } from "../types/index.js";
export declare function recordRequest(accountLabel: string, accountType: string): void;
export declare function recordSuccess(accountLabel: string, accountType: string): void;
export declare function recordError(accountLabel: string, accountType: string, status: number): void;
export declare function recordCooldown(accountLabel: string, accountType: string, cooldownUntil: number, backoffLevel: number): void;
export declare function getStats(): ProxyStats;
export declare function getAccountStats(label: string): AccountStats | undefined;
export declare function resetStats(): void;
