import { MessageFunctionType, Result } from '../types';
export interface IsIBANErrors {
    TARGET_ARGUMENT_NOT_A_STRING: MessageFunctionType;
}
export declare const IS_IBAN_ERRORS: IsIBANErrors;
/**
 * Checks whether the IBAN number has a valid format and checksum.
 *
 * @param target The target string
 * @return true if the target has a valid format and checksum, false otherwise
 */
export declare function isIBAN(target: string): Result<boolean | undefined>;