import * as bitcoin from "bitcoinjs-lib";
import { APIConfig } from "../helpers/apiHelpers";
import { Quote } from "../types";
interface BitcoinWallet {
    address: string;
    signTransaction: (psbt: bitcoin.Psbt) => Promise<bitcoin.Psbt>;
    broadcastTransaction: (tx: string) => Promise<string>;
}
export declare class BitcoinService {
    readonly wallet: BitcoinWallet;
    private apiService;
    private network;
    private apiEndpoint;
    constructor(wallet: BitcoinWallet, apiConfig: APIConfig, sdkOptions?: {
        sandbox?: boolean;
        apiKey?: string;
    });
    /**
     * Fetches a quote for Bitcoin transfer.
     *
     * @returns {Promise<Quote>} A promise that resolves to a Quote object.
     */
    fetchQuote(): Promise<Quote>;
    /**
     * Fetches the Bitcoin vault address.
     *
     * @returns {Promise<{ address: string }>} A promise that resolves to the vault address.
     */
    fetchVault(): Promise<{
        address: string;
        tag?: string;
    }>;
    getUTXOs(): Promise<Array<{
        txid: string;
        vout: number;
        value: number;
        rawTx: Buffer;
    }>>;
    private getBalance;
    /**
     * Transfers Bitcoin to the vault address.
     *
     * @param {string} amount - The amount of BTC to transfer in BTC units
     * @param {number} feeRate - Fee rate in satoshis per byte
     * @returns {Promise<string>} - A promise that resolves to the transaction hash
     * @throws {Error} If there is not enough balance or if the transaction fails.
     */
    transferBTC(amount: string, feeRate?: number): Promise<string>;
    /**
     * Gets the balance of the Bitcoin wallet.
     *
     * @returns {Promise<string>} - A promise that resolves to the wallet balance in BTC
     */
    getWalletBalance(): Promise<string>;
}
export {};