import { SecurityEvent, SecurityEventSeverity, SecurityEventType } from './securityEvent';
/**
 * Security audit logger for tracking security-relevant events
 */
export declare class SecurityAuditLogger {
    private static instance;
    private events;
    private maxEvents;
    private _silent;
    private constructor();
    static getInstance(): SecurityAuditLogger;
    /**
     * Enable or disable console output (useful for tests)
     */
    set silent(value: boolean);
    get silent(): boolean;
    /**
     * Log a security event
     */
    log(type: SecurityEventType, severity: SecurityEventSeverity, message: string, metadata?: {
        correlationId?: string;
        userId?: string;
        blockId?: string;
        [key: string]: unknown;
    }): void;
    /**
     * Log signature validation success
     */
    logSignatureValidation(success: boolean, blockId?: string, userId?: string): void;
    /**
     * Log block creation
     */
    logBlockCreated(blockId: string, userId?: string): void;
    /**
     * Log encryption operation
     */
    logEncryption(blockId: string, recipientCount?: number): void;
    /**
     * Log decryption operation
     */
    logDecryption(success: boolean, blockId: string, userId?: string): void;
    /**
     * Log access denied
     */
    logAccessDenied(resource: string, userId?: string): void;
    /**
     * Get recent events
     */
    getEvents(limit?: number): SecurityEvent[];
    /**
     * Clear all events
     */
    clear(): void;
    /**
     * Output event to console
     */
    private outputEvent;
}
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