Facebook Messenger Chatbot Custom Event Tracking - facebook-graph-api

Question

I am trying to log custom events with a Facebook Chatbot I have developed, however I cannot for the life of me find a reference for the custom_events types.
The example listed on their reference shows fb_mobile_purchase as a custom eventName. I don't want that, and I can't find anywhere that lists other types.
I want to be able to track when the chatbot sends the user a specific message, but just setting the eventName to anything results in an event name in the Analytics as Reserved5.
Is there a reference to eventNames anywhere within Facebook Documentation?

Answer 1

You could consider using Chatbase for bot analytics (free to use), which has a Custom Events API.

Answer 2

Currently the docs give this as an example request:
var request = require('request');
request.post({
url : "https://graph.facebook.com/<app_id>/activities",
form: {
event: 'CUSTOM_APP_EVENTS',
custom_events: JSON.stringify([{
_eventName: "fb_mobile_purchase",
_valueToSum: 55.22,
_fb_currency: 'USD'
}]),
advertiser_tracking_enabled: 0,
application_tracking_enabled: 0,
extinfo: JSON.stringify(['mb1']),
page_id: <page_id>,
page_scoped_user_id: recipientId
}
}, function(err,httpResponse,body){
console.error(err);
console.log(httpResponse.statusCode);
console.log(body);
});
So, when the bot is sending that specific message you want to keep an eye out for, fire that message but with a different _eventName, and if needed other parameters.
Keep in mind, by recipientId they mean the PSID of the user the bot is sending the message to.