/**
 * Configuration parsing and default values for certificate verification
 */
import type { CertificateVerificationConfig } from './types.ts';
export declare const CRL_DEFAULT_VALIDITY_PERIOD: number;
export declare const ERROR_CACHE_TTL = 300000;
export declare const CRL_USER_AGENT: string;
/**
 * Cached version of getCertificateVerificationConfig to avoid redundant parsing
 * This is the recommended function to use in hot paths like certificate verification.
 *
 * MEMORY SAFETY:
 * - Uses WeakMap for object configs to prevent memory leaks
 * - Config objects can be garbage collected when no longer referenced elsewhere
 * - Primitive values (boolean, null, undefined) use simple reference equality
 * - No strong references held to config objects, preventing memory accumulation
 *
 * ERROR HANDLING:
 * - Invalid config causes validation errors to be thrown on first access
 * - Validation errors are logged once and then cached
 * - Subsequent accesses with the same invalid config return false (disabled) to prevent
 *   repeated error logging and allow the application to continue running
 * - This provides fail-safe behavior: invalid security config defaults to disabled
 *   rather than crashing on every request
 *
 * @param mtlsConfig - The mTLS configuration from env.get()
 * @returns Configuration object or false if verification is disabled or invalid
 */
export declare function getCachedCertificateVerificationConfig(mtlsConfig?: boolean | Record<string, any> | null): false | CertificateVerificationConfig;
