import { CardDetails, CardToken } from '../types';
import { AxiosInstance } from 'axios';
export declare class Utils {
    private encryptionKey;
    private axiosInstance;
    constructor(encryptionKey: string, axiosInstance: AxiosInstance);
    tokenizeCard(cardDetails: CardDetails): Promise<CardToken>;
    validateCardDetails(cardDetails: CardDetails): void;
    private encryptPayload;
    private decryptResponse;
}
export declare const URL_PATTERN: RegExp;
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