import { TxHash } from '@xchainjs/xchain-client';
import { Address } from '@xchainjs/xchain-util';
import { HDNodeWallet } from 'ethers';
import { IKeystoreSigner, SignApproveParams, SignTransferParams } from '../types';
import { Signer, SignerParams } from './signer';
/**
 * Keystore signer parameters
 */
export type KeystoreSignerParams = SignerParams & {
    phrase: string;
};
/**
 * Signer which operates with an EVM account thanks to the seed phrase
 */
export declare class KeystoreSigner extends Signer implements IKeystoreSigner {
    private hdNode?;
    private phrase?;
    constructor(params: KeystoreSignerParams);
    /**
     * Validates the given Ethereum address.
     *
     * @param {Address} address - The address to validate.
     * @returns {boolean} `true` if the address is valid, `false` otherwise.
     */
    setPhrase(phrase: string, walletIndex?: number): Address;
    /**
     * Purges the client, resetting it to initial state.
     *
     * @returns {void}
     */
    purge(): void;
    /**
     * @deprecated Use getAddressAsync instead. This function will eventually be removed.
     */
    getAddress(walletIndex?: number): Address;
    /**
     * Get the current address asynchronously.
     *
     * @param {number} walletIndex The current address.
     * @returns {Address} The current address.
     * @throws {Error} Thrown if HDNode is not defined, indicating that a phrase is needed to derive an address.
     * @throws {Error} Thrown if wallet index < 0.
     */
    getAddressAsync(walletIndex?: number): Promise<Address>;
    /**
     * Retrieves the Ethereum wallet interface.
     *
     * @param {number} walletIndex - The index of the HD wallet (optional).
     * @returns {Wallet} The current Ethereum wallet interface.
     * @throws Error - Thrown if the HDNode is not defined, indicating that a phrase is needed to create a wallet and derive an address.
     * Note: A phrase is needed to create a wallet and to derive an address from it.
     */
    getWallet(walletIndex?: number): HDNodeWallet;
    /**
     * Sign an EVM transaction with Ledger
     *
     * @param {SignTransferParams} params Sign transfer params
     * @param {string} SignTransferParams.sender Fee option (optional)
     * @param {ethers.Transaction} SignTransferParams.tx Fee option (optional)
     * @returns {string} The raw signed transaction.
     */
    signTransfer({ walletIndex, tx }: SignTransferParams): Promise<TxHash>;
    /**
     * Sign an EVM approve transaction with Ledger
     *
     * @param {SignTransferParams} params Sign transfer params
     * @param {string} SignTransferParams.sender The sender address
     * @param {ethers.Transaction} SignTransferParams.tx Approve transaction to sign
     * @returns {string} The raw signed transaction.
     */
    signApprove({ walletIndex, tx }: SignApproveParams): Promise<string>;
}