import { type PairingCode, type PairingCodeValidationResult } from "./pairing-code.js";
export interface InMemoryPairingCodeStoreOptions {
    /** Interval for automatic cleanup in milliseconds (default: 60000) */
    cleanupIntervalMs?: number;
}
/**
 * In-memory store for pairing codes with automatic cleanup
 */
export declare class InMemoryPairingCodeStore {
    private codes;
    private cleanupTimer;
    private invalidAttempts;
    constructor(options?: InMemoryPairingCodeStoreOptions);
    /**
     * Generate a new pairing code
     * @param clientIp - IP address of the client generating the code
     * @returns The generated pairing code entry
     */
    generate(clientIp: string): PairingCode;
    /**
     * Validate a pairing code
     * @param code - The code to validate
     * @param _clientIp - IP address of the client (for logging/auditing, not strict validation)
     * @returns Validation result
     */
    validate(code: string, _clientIp: string): PairingCodeValidationResult;
    /**
     * Get the current active (non-expired) pairing code
     * @returns The most recent non-expired code, or null if none exists
     */
    getCurrent(): PairingCode | null;
    /**
     * Clean up expired pairing codes
     */
    cleanup(): void;
    /**
     * Dispose of the store and stop cleanup timer
     */
    dispose(): void;
    /**
     * Generate a cryptographically secure session token
     */
    private generateSessionToken;
}