import { FeeRate, TxHash } from '@xchainjs/xchain-client';
import { Address } from '@xchainjs/xchain-util';
import { TxParams, UtxoClientParams } from '@xchainjs/xchain-utxo';
import { Client } from './client';
import { AddressFormat } from './types';
/**
 * Custom Bitcoin client extended to support keystore functionality
 */
declare class ClientKeystore extends Client {
    constructor(params?: UtxoClientParams & {
        addressFormat?: AddressFormat;
    });
    /**
     * @deprecated This function eventually will be removed. Use getAddressAsync instead.
     * Get the address associated with the given index.
     * @param {number} index The index of the address.
     * @returns {Address} The Bitcoin address.
     * @throws {"index must be greater than zero"} Thrown if the index is less than zero.
     * @throws {"Phrase must be provided"} Thrown if the phrase has not been set before.
     * @throws {"Address not defined"} Thrown if failed to create the address from the phrase.
     */
    getAddress(index?: number): Address;
    /**
     * Get the current address asynchronously.
     * @param {number} index The index of the address.
     * @returns {Promise<Address>} A promise that resolves to the Bitcoin address.
     * @throws {"Phrase must be provided"} Thrown if the phrase has not been set before.
     */
    getAddressAsync(index?: number): Promise<string>;
    /**
     * @private
     * Get the Bitcoin keys derived from the given phrase.
     *
     * @param {string} phrase The phrase to be used for generating the keys.
     * @param {number} index The index of the address.
     * @returns {Bitcoin.ECPair.ECPairInterface} The Bitcoin key pair.
     * @throws {"Could not get private key from phrase"} Thrown if failed to create BTC keys from the given phrase.
     */
    private getBtcKeys;
    /**
     * Transfer BTC.
     *
     * @param {TxParams&FeeRate} params The transfer options including the fee rate.
     * @returns {Promise<TxHash|string>} A promise that resolves to the transaction hash or an error message.
     * @throws {"memo too long"} Thrown if the memo is longer than 80 characters.
     */
    transfer(params: TxParams & {
        feeRate?: FeeRate;
    }): Promise<TxHash>;
}
export { ClientKeystore };