export declare function validateApiKey(apiKey: string): void;
export declare function validatePhoneNumber(phoneNumber: string): void;
export declare function validatePhoneNumbers(phoneNumbers: string[]): void;
export declare function validateMessage(message: string, maxLength?: number): void;
export declare function validateWorkspaceName(name: string): void;
export declare function validateCampaignName(name: string): void;
export declare function validateUUID(id: string, fieldName?: string): void;
export declare function validatePaginationParams(params: {
    page?: number;
    limit?: number;
    offset?: number;
}): void;
export declare function validateISODate(dateString: string, fieldName?: string): void;
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