export declare class WebhookValidation {
    /**
     * Validate webhook event type
     */
    static isValidWebhookEvent(event: string): boolean;
    /**
     * Validate HTTP method
     */
    static isValidHttpMethod(method: string): boolean;
    /**
     * Validate URL format
     */
    static isValidUrl(url: string): boolean;
    /**
     * Validate required fields
     */
    static validateRequired<T extends Record<string, any>>(obj: T, requiredFields: (keyof T)[]): string[];
    /**
     * Sanitize webhook URL
     */
    static sanitizeUrl(url: string): string;
}
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