import { Asset, Horizon } from "@zebec-fintech/stellar-sdk";
import { ZebecCardAPIService } from "../helpers/apiHelpers";
export interface XDBWalletInterface {
    address: string;
    signTransaction: (txXdr: string) => Promise<string>;
}
export declare class XDBService {
    readonly wallet: XDBWalletInterface;
    readonly apiService: ZebecCardAPIService;
    readonly server: Horizon.Server;
    private readonly sandbox;
    /**
     * Constructs an instance of the service.
     *
     * @param {DigitalBitsSdk.Keypair} signer - The signer keypair for the DigitalBits wallet.
     * @param {APIConfig} apiConfig - The configuration object for the API.
     * @param sdkOptions - Optional configuration for the SDK.
     */
    constructor(wallet: XDBWalletInterface, sdkOptions?: {
        sandbox?: boolean;
        apiKey?: string;
    });
    /**
     * Fetches the Vault address.
     *
     * @returns {Promise<string>} A promise that resolves to the Vault address.
     */
    fetchVault(symbol?: string): Promise<{
        address: string;
        tag?: string;
    }>;
    /**
     * Purchases a card by transferring XDB tokens.
     *
     * @param params - The parameters required to purchase a card.
     * @returns A promise that resolves to an array containing the transaction details and the API response.
     * @throws {InvalidEmailError} If the recipient's email address is invalid.
     * @throws {Error} If the quote is invalid or expired, if there is not enough balance, or if the transaction fails.
     */
    transferXDB(amount: string): Promise<string>;
    /**
     * Retrieves the balance of the specified wallet.
     *
     * @param {string} wallet - The public key of the wallet to get the balance for.
     * @returns {Promise<string>} - A promise that resolves to the balance of the wallet.
     */
    getNativeBalance(wallet: string): Promise<string>;
    /**
     * Retrieves the balance of a specific token for the specified wallet.
     *
     * @param {string} wallet - The public key of the wallet to get the token balance for.
     * @param {Asset} asset - The asset object representing the token.
     * @returns {Promise<string>} - A promise that resolves to the balance of the token.
     */
    getTokenBalance(wallet: string, asset: Asset): Promise<string>;
    getAsset(assetCode: string, assetIssuer: string): Asset;
}