import { Provider } from 'ethers';
import { ISigner, SignApproveParams, SignTransferParams } from '../types';
/**
 * Signer parameters
 */
export type SignerParams = {
    provider: Provider;
    derivationPath: string;
};
/**
 * Abstraction of EVM Account
 */
export declare abstract class Signer implements ISigner {
    protected provider: Provider;
    protected derivationPath: string;
    constructor({ provider, derivationPath }: SignerParams);
    /**
     * Get the full derivation path based on the wallet index.
     * @param {number} walletIndex The HD wallet index
     * @returns {string} The full derivation path
     */
    getFullDerivationPath(walletIndex: number): string;
    /**
     * Get the provider the signer is using to be connected with the blockchain.
     * @returns {Provider} The provider the signer is using
     */
    protected getProvider(): Provider;
    abstract purge(): void;
    abstract signTransfer(params: SignTransferParams): Promise<string>;
    abstract signApprove(params: SignApproveParams): Promise<string>;
    abstract getAddressAsync(walletIndex?: number | undefined): Promise<string>;
}