Using patch_set parameter

Developers
#1

Hi everyone,
I am trying to get started with developing an lv2 plugin. The plugin is going to be a midi looper, but at the moment I am kind of stuck at getting the basics to work.
There will be some toggles and momentaries that control the plugin state, that is why I thought it is good to use the patch vocabulary for this.
I get some errors from lv2lint:

[FAIL]  Plugin State
              state:interface not returned by 'extension_data'
              seeAlso: <http://lv2plug.in/ns/ext/state#interface>
 [FAIL]  Plugin Patch
              no patch:Message support on any output
              seeAlso: <http://lv2plug.in/ns/ext/patch#Message>

In Ardour I can get the toggle button to notify me, however jalv and carla do not give me this pleasure.

My code so far: GitHub - Momomentum/midilooper: An LV2 midi looper
Patch_set is based on: GitHub - x42/property_example.lv2: LV2 Property/Parameter Example Plugin

Can anyone guide me in the right direction?

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