ssh2-promise is a powerful promise wrapper around ssh2 client. It supports all the ssh2 client operation such as connection hopping, exec, spawn, shell, sftp, open tunnel, open socks connection etc... in promisify way. It helps in caching the sshconnection, to reduce time, during connection hopping. It have reconnect logic, so that, once disconnected, it can retry the sshconnection, automatically.
It has promise wrapper around sftp operations too.