/**
* lock a specific unspent output
*
* @param $txHash
* @param $txIdx
* @param int $ttl
* @return bool
*/
public function lockUTXO($txHash, $txIdx, $ttl = 3)
{
return $this->sdk->lockWalletUTXO($this->identifier, $txHash, $txIdx, $ttl);
}
