import { Quote } from "../types";
export type APIConfig = {
    apiKey: string;
    encryptionKey: string;
};
export declare class ZebecCardAPIService {
    readonly apiConfig: APIConfig & {
        apiUrl: string;
    };
    private readonly sdkVersion;
    private readonly api;
    constructor(apiConfig: APIConfig, sandbox?: boolean);
    private generateSignature;
    generateRequestHeaders(method: string, path: string, body?: any): {
        "X-API-Key": string;
        "X-Timestamp": string;
        "X-Nonce": string;
        "X-Signature": string;
        "X-SDK-Version": string;
        "Content-Type": string;
    };
    encryptSensitiveData(data: any): string;
    ping(): Promise<boolean>;
    purchaseCard(data: any): Promise<import("axios").AxiosResponse<any, any>>;
    fetchQuote(symbol: string): Promise<Quote>;
    fetchVault(symbol: string): Promise<{
        address: string;
        tag?: string;
    }>;
}