How do plugins store their configuration/field data?

Question

I'm creating a custom Commerce License and I notice that I'm handling defaultConfiguration(), buildConfigurationForm(), submitConfigurationForm(), and buildFieldDefinitions(), but I cannot figure out where in the database this information is stored. I know that it must exist somewhere as the data loads up when I view the entity, but I cannot seem to find it. It doesn't seem to have anything to do with Configuration that would exist in a sync folder despite the similar names.

I'd assume buildFieldDefinitions() has something to do with it, but I cannot seem to figure out exactly what that method is doing at all.

Answer 1

Sounds like the answer is "the data is probably the config table... but it could also be anywhere else depending on the implementation." In the commerce_license example I noted, instances of LicenseTypes on Product variants get their own entry in commerce_product_variation__license_type, where the data for that instance is stored in the license_type_target_plugin_configration column. Just like data stored in the config table, this is a hex blob which, when decoded, is the config field data as a serialized array.