EventSubEvents

EventSub is a Ruby library for Twitch EventSub webhooks. It is built on the ActiveSupport::Notifications API.

This is forked from stripe_event and modified for use with Twitch EventSub.

Install

# Gemfile
gem "event_sub_events"

# config/routes.rb
mount EventSubEvents::Engine, at: "/my-chosen-path"

Usage

# config/initializers/event_sub_events.rb
EventSubEvents.signing_secret = ENV['TWITCH_SIGNING_SECRET']

EventSubEvents.configure do |events|
  events.subscribe "channel.ban" do |event|
    event.subscription
    event.event
  end

  events.all do |event|
    # Handle all event types - logging, etc.
  end
end

When a webhook_callback_verification_pending event is received, the event_sub_events engine will return the challenge response automatically.

Subscriber objects that respond to #call

class CustomerCreated
  def call(event)
    # Event handling
  end
end

class BillingEventLogger
  def initialize(logger)
    @logger = logger
  end

  def call(event)
    @logger.info "BILLING:#{event.type}:#{event.id}"
  end
end

EventSubEvents.configure do |events|
  events.all BillingEventLogger.new(Rails.logger)
  events.subscribe 'customer.created', CustomerCreated.new
end

Securing your webhook endpoint

Authenticating webhooks with signatures

Twitch will cryptographically sign webhook events with a signature which is included with a header sent with the request. Verifying this signature lets your application properly authenticate the request originated from Twitch.

Please set the signing_secret configuration value:

EventSubEvents.signing_secret = "abc123"

Please refer to Twitch's documentation for more details

Support for multiple signing secrets

You can also supply multiple secrets by sending an array to signing_secrets like so:

EventSubEvents.signing_secrets = [
  "abc123",
  "123abc"
]

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/deanpcmad/eventsub-events.

License

The gem is available as open source under the terms of the MIT License.