></dt><dd><p><code>account_sign acc msg msg_len signature signature_len</code></p><p>Signs a message with the ed25519 key for this account. Returns olm_error() on failure. If the signature buffer was too small then olm_account_last_error() will be &quot;OUTPUT_BUFFER_TOO_SMALL&quot;</p></dd></dl><dl><dt class="spec value" id="val-account_one_time_keys_length"><a href="#val-account_one_time_keys_length" class="anchor"></a><code><span class="keyword">val</span> account_one_time_keys_length : <span><a href="..