import { Asset, Horizon } from "@stellar/stellar-sdk";
import { APIConfig } from "../helpers/apiHelpers";
import { Quote } from "../types";
export interface StellarWallet {
    address: string;
    signTransaction: (txXdr: string) => Promise<string>;
}
export declare class StellarService {
    readonly wallet: StellarWallet;
    private apiService;
    readonly server: Horizon.Server;
    private 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: StellarWallet, apiConfig: APIConfig, sdkOptions?: {
        sandbox?: boolean;
        apiKey?: string;
    });
    /**
     * Fetches a quote for the given amount.
     *
     * @param {string | number} amount - The amount for which to fetch the quote.
     * @returns {Promise<Quote>} A promise that resolves to a Quote object.
     */
    fetchQuote(): Promise<Quote>;
    /**
     * 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.
     */
    transferXLM(amount: string): Promise<string>;
    /**
     * Transfers USDC tokens.
     *
     * @param {string} amount - The amount of USDC to transfer.
     * @returns {Promise<string>} A promise that resolves to the transaction hash.
     * @throws {Error} If there is not enough USDC balance or if the transaction fails.
     */
    transferUSDC(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.
     */
    getWalletBalance(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): Promise<Asset>;
}