ic.ptr</span> <span>&#45;&gt;</span> Unsigned.size_t <span>&#45;&gt;</span> Unsigned.size_t</code></dt><dd><p><code>outbound_group_session_key sess key key_len</code></p><p>Get the base64-encoded current ratchet key for this session.</p><p>Each message is sent with a different ratchet key. This function returns the ratchet key that will be used for the next message.</p><p>Returns the length of the ratchet key on success or olm_error() on failure. On failure last_error will be set with an error code. The las