import { Buffer } from 'buffer';
/** to present encrypted private key in Ethereum keystore format. */
export interface Keystore {
    address: string;
    crypto: object;
    id: string;
    version: number;
}
export declare namespace Keystore {
    /**
     * encrypt private key to keystore with given password
     * @param privateKey the private key to be encrypted
     * @param password password to encrypt the private key
     */
    function encrypt(privateKey: Buffer, password: string): Promise<any>;
    /**
     * decrypt private key from keystore
     * an error thrown if not well formed
     * @param ks the keystore
     * @param password password to decrypt keystore
     */
    function decrypt(ks: Keystore, password: string): Promise<Buffer<ArrayBuffer>>;
    /**
     * roughly check whether keystore is well formed
     * @param ks the keystore
     */
    function wellFormed(ks: any): ks is Keystore;
}