import { MessageFunctionType, Result } from '../types';
export interface IsCurrencyErrors {
    TARGET_ARGUMENT_NOT_A_STRING: MessageFunctionType;
}
export declare const IS_CURRENCY_ERRORS: IsCurrencyErrors;
export interface IsCurrencyOptions {
    symbol: string;
    require_symbol: boolean;
    allow_space_after_symbol: boolean;
    symbol_after_digits: boolean;
    allow_negatives: true;
    parens_for_negatives: boolean;
    negative_sign_before_digits: boolean;
    negative_sign_after_digits: boolean;
    allow_negative_sign_placeholder: boolean;
    thousands_separator: string;
    decimal_separator: string;
    allow_decimal: true;
    require_decimal: boolean;
    digits_after_decimal: Array<number>;
    allow_space_after_digits: boolean;
}
/**
 * Tests whether the `target` string is a currency
 *
 * ### Example
 * ```
 * expect(isCurrency('1.39').value).toBeTruthy()
 * ```
 * @param target The target string
 * @param options The options
 */
export declare function isCurrency(target: string, options?: any): Result<boolean | undefined>;