close(channel_pid :: pid(), handle :: term(), timeout()) ::
  :ok | {:error, any()}

del_dir(channel_pid :: pid(), path :: charlist(), timeout()) ::
  :ok | {:error, any()}

delete(channel_pid :: pid(), path :: charlist(), timeout()) ::
  :ok | {:error, any()}

list_dir(channel_pid :: pid(), path :: charlist(), timeout()) ::
  {:ok, [charlist()]} | {:error, any()}

list_dir(channel_pid :: pid(), path :: charlist(), timeout()) ::
  {:ok, [charlist()]} | {:error, any()}

make_dir(channel_pid :: pid(), path :: charlist(), timeout()) ::
  :ok | {:error, any()}

make_link(
  channel_pid :: pid(),
  symlink_path :: charlist(),
  target_path :: charlist(),
  timeout()
) :: :ok | {:error, any()}

open(
  channel_pid :: pid(),
  path :: charlist(),
  modes :: [SFTPClient.access_mode()],
  timeout()
) :: {:ok, term()} | {:error, any()}

opendir(channel_pid :: pid(), path :: charlist(), timeout()) ::
  {:ok, term()} | {:error, any()}

read(
  channel_pid :: pid(),
  handle :: term(),
  length :: non_neg_integer(),
  timeout()
) :: {:ok, binary()} | :eof | {:error, any()}

read_file(channel_pid :: pid(), path :: charlist(), timeout()) ::
  {:ok, binary()} | {:error, any()}

read_file_info(channel_pid :: pid(), path :: charlist(), timeout()) ::
  {:ok, term()} | {:error, any()}

read_link(channel_pid :: pid(), path :: charlist(), timeout()) ::
  {:ok, charlist()} | {:error, any()}

read_link_info(channel_pid :: pid(), path :: charlist(), timeout()) ::
  {:ok, term()} | {:error, any()}

readdir(channel_pid :: pid(), handle :: term(), timeout()) ::
  {:ok, binary()} | {:error, any()}

rename(
  channel_pid :: pid(),
  old_path :: charlist(),
  new_path :: charlist(),
  timeout()
) :: :ok | {:error, any()}

start_channel(
  host :: charlist(),
  port :: non_neg_integer(),
  opts :: Keyword.t()
) :: {:ok, pid(), pid()} | {:error, any()}

stop_channel(channel_pid :: pid()) :: :ok

write(channel_pid :: pid(), path :: charlist(), data :: binary(), timeout()) ::
  :ok | {:error, any()}

write_file(
  channel_pid :: pid(),
  path :: charlist(),
  data :: [binary()],
  timeout()
) :: :ok | {:error, any()}