/**
 * Webhook Security
 *
 * Implements webhook signature verification and basic payload validation
 */
export interface WebhookSignatureResult {
    valid: boolean;
    error?: string;
}
export interface PayloadValidationResult {
    valid: boolean;
    blocked: boolean;
    threats?: string[];
    sanitized?: unknown;
}
/**
 * Check if event has already been processed
 */
export declare function isEventProcessed(eventId: string): Promise<boolean>;
/**
 * Mark event as processed
 */
export declare function markEventProcessed(eventId: string, eventType: string, _issueKey?: string, _ticketId?: string, _payload?: unknown, _error?: unknown): Promise<void>;
/**
 * Clear processed events (useful for testing)
 */
export declare function clearProcessedEvents(): void;
/**
 * Verify webhook signature using HMAC SHA256
 */
export declare function verifyWebhookSignature(payload: string | Buffer, signature: string, secret: string): WebhookSignatureResult;
/**
 * Validate webhook payload with basic checks
 *
 * Performs basic validation: length checks, type validation
 */
export declare function validateWebhookPayload(payload: unknown, options?: {
    blockSQLi?: boolean;
    blockXSS?: boolean;
    strict?: boolean;
}): Promise<PayloadValidationResult>;
/**
 * Validate webhook security (signature + payload)
 */
export declare function validateWebhookSecurity(body: string | Buffer, signature: string, secret: string, payload: unknown, options?: {
    validatePayload?: boolean;
    blockSQLi?: boolean;
    blockXSS?: boolean;
    strict?: boolean;
}): Promise<{
    valid: boolean;
    signatureValid: boolean;
    payloadValid: boolean;
    blocked: boolean;
    reason?: string;
    threats?: string[];
}>;
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