/**
 * Track API response times and status.
 *
 * @param endpoint - The API endpoint called
 * @param method - HTTP method used
 * @param startTime - Start timestamp from performance.now()
 * @param status - HTTP response status code (0 for network errors)
 * @param server - Server identifier (production, staging, etc.)
 */
export declare function trackApiCall(endpoint: string, method: string, startTime: number, status: number, server: string): void;
/**
 * Track chain/network switches for usage distribution analysis.
 *
 * @param chainId - The chain ID being switched to
 */
export declare function trackNetworkSwitch(chainId: number): void;
/**
 * Track the outcome of an API-key verification check (e.g. `verifyAugustKey`).
 * Records success/failure as a breadcrumb and a low-cardinality tag so
 * verification failures are visible in the dashboard without leaking the key
 * itself — callers must never pass the raw key value.
 *
 * @param keyType - Which key was verified (e.g. `'august'`)
 * @param success - Whether the key was accepted
 */
export declare function trackKeyVerification(keyType: string, success: boolean): void;
declare let cacheStats: {
    hits: number;
    misses: number;
    sets: number;
};
/**
 * Cache statistics snapshot. The SDK never recorded cache hits, misses, or
 * sets, so every field is always `0`.
 *
 * @deprecated Always returns zeros. Kept only for API compatibility and will
 * be removed in the next major release; there is no replacement.
 */
export declare function getCacheStats(): typeof cacheStats;
/**
 * Reset the cache statistics snapshot to zeros. The SDK never records any, so
 * this has no observable effect.
 *
 * @deprecated Has no effect. Kept only for API compatibility and will be
 * removed in the next major release; there is no replacement.
 */
export declare function resetCacheStats(): void;
export {};