I have an angular app host in iOS hand held device (e.g. iPhone). This app should print out the receipt to remote printer (e.g QLn420) by using Bluetooth connection between iOS device and printer. Is there any Lib or service can do this kind of printing? Thanks.

+--------+ +-----------+
| iOS | Bluetooth | Printer |
| +<----------------------------->+ |
+---------+ +-----------+