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There are two suggested ways to allow Lua modules to interact: firing events and SQL databases.

Using Events

Events:Subscribe and Events:Fire work between modules. Using them is simple: Module A uses Events:Subscribe as normal, but, instead of subscribing to one of the event names the API provides, use your own name. When Module B uses Events:Fire with the same event name, Module A receives it.

Module A

Events:Subscribe("Banana", MyFunction)

Module B

Events:Fire("Banana")