pes/Session/index.html#type-t">Types.Session.t</a> Ctypes_static.ptr</span> <span>&#45;&gt;</span> <span>unit Ctypes_static.ptr</span> <span>&#45;&gt;</span> Unsigned.size_t <span>&#45;&gt;</span> <span>unit Ctypes_static.ptr</span> <span>&#45;&gt;</span> Unsigned.size_t <span>&#45;&gt;</span> Unsigned.size_t</code></dt><dd><p><code>unpickle_session sess key key_len pickled pickled_len</code></p><p>Loads a session from a pickled base64 string. Decrypts the session using the supplied key. Returns olm_error()