⚠️ Add strongly typed EventNotifications (#1650)

* manual changes

* move eventNotification to v2 namespace

* updated rbi

* add tests

* Add basic rbi

* generate event data types

* move some things, fix tests

* add missing attributes

* update gemspec, examples, and rbi

* fix example

.rubocop.yml

@@ -19,6 +19,7 @@ Layout/LineLength:
     - "lib/stripe/stripe_client.rb"
     - "lib/stripe/resources/**/*.rb"
     - "lib/stripe/services/**/*.rb"
+    - "lib/stripe/events/**/*.rb"
     - "test/**/*.rb"
 
 Lint/MissingSuper:

.vscode/settings.json

@@ -2,7 +2,8 @@
   // Show the repo name in the top window bar.
   "window.title": "${rootName}${separator}${activeEditorMedium}",
 
-  "editor.formatOnSave": true,
+  // formatting on save is very slow in ruby
+  "editor.formatOnSave": false,
   "files.trimTrailingWhitespace": true,
 
   // Rubocop settings

examples/README.md

@@ -5,7 +5,7 @@ From the examples folder, run:
 
 e.g.
 
-`RUBYLIB=../lib ruby thinevent_webhook_handler.rb`
+`RUBYLIB=../lib ruby event_notification_webhook_handler.rb`
 
 ## Adding a new example
 

examples/event_notification_webhook_handler.rb

@@ -1,12 +1,12 @@
 # frozen_string_literal: true
 # typed: false
 
-# thinevent_webhook_handler.rb - receive and process thin events like the
+# event_notification_webhook_handler.rb - receive and process event notification like the
 # v1.billing.meter.error_report_triggered event.
 #
 # In this example, we:
 #     - create a StripeClient called client
-#     - use client.parse_thin_event to parse the received thin event webhook body
+#     - use client.parse_event_notification to parse the received event notification webhook body
 #     - call client.v2.core.events.retrieve to retrieve the full event object
 #     - if it is a V1BillingMeterErrorReportTriggeredEvent event type, call
 #       event.fetchRelatedObject to retrieve the Billing Meter object associated
@@ -24,12 +24,10 @@ client = Stripe::StripeClient.new(api_key)
 post "/webhook" do
   webhook_body = request.body.read
   sig_header = request.env["HTTP_STRIPE_SIGNATURE"]
-  thin_event = client.parse_thin_event(webhook_body, sig_header, webhook_secret)
+  event_notification = client.parse_event_notification(webhook_body, sig_header, webhook_secret)
 
-  # Fetch the event data to understand the failure
-  event = client.v2.core.events.retrieve(thin_event.id)
-  if event.instance_of? Stripe::V1BillingMeterErrorReportTriggeredEvent
-    meter = event.fetch_related_object
+  if event_notification.instance_of?(Stripe::Events::V1BillingMeterErrorReportTriggeredEventNotification)
+    meter = event_notification.fetch_related_object
     meter_id = meter.id
     puts "Success!", meter_id
   end

lib/stripe.rb

@@ -51,7 +51,7 @@ require "stripe/api_resource_test_helpers"
 require "stripe/singleton_api_resource"
 require "stripe/webhook"
 require "stripe/stripe_configuration"
-require "stripe/thin_event"
+require "stripe/event_notification"
 
 # Named API resources
 require "stripe/resources"

lib/stripe/event_notification.rb

@@ -0,0 +1,70 @@
+# frozen_string_literal: true
+
+module Stripe
+  module V2
+    class EventReasonRequest
+      attr_reader :id, :idempotency_key
+
+      def initialize(event_reason_request_payload = {})
+        @id = event_reason_request_payload[:id]
+        @idempotency_key = event_reason_request_payload[:idempotency_key]
+      end
+    end
+
+    class EventReason
+      attr_reader :type, :request
+
+      def initialize(event_reason_payload = {})
+        @type = event_reason_payload[:type]
+        @request = EventReasonRequest.new(event_reason_payload[:request])
+      end
+    end
+
+    class RelatedObject
+      attr_reader :id, :type, :url
+
+      def initialize(related_object)
+        @id = related_object[:id]
+        @type = related_object[:type]
+        @url = related_object[:url]
+      end
+    end
+
+    class EventNotification
+      attr_reader :id, :type, :created, :context, :livemode, :reason
+
+      def initialize(event_payload, client)
+        @id = event_payload[:id]
+        @type = event_payload[:type]
+        @created = event_payload[:created]
+        @livemode = event_payload[:livemode]
+        @context = event_payload[:context]
+        @reason = EventReason.new(event_payload[:reason]) if event_payload[:reason]
+        # private unless a child declares an attr_reader
+        @related_object = RelatedObject.new(event_payload[:related_object]) if event_payload[:related_object]
+
+        # internal use
+        @client = client
+      end
+
+      # Retrieves the Event that generated this EventNotification.
+      def fetch_event
+        resp = @client.raw_request(:get, "/v2/core/events/#{id}", opts: { stripe_context: context },
+                                                                  usage: ["fetch_event"])
+        @client.deserialize(resp.http_body, api_mode: :v2)
+      end
+    end
+
+    class UnknownEventNotification < EventNotification
+      attr_reader :related_object
+
+      def fetch_related_object
+        return nil if @related_object.nil?
+
+        resp = @client.raw_request(:get, related_object.url, opts: { stripe_context: context },
+                                                             usage: ["fetch_related_object"])
+        @client.deserialize(resp.http_body, api_mode: Util.get_api_mode(related_object.url))
+      end
+    end
+  end
+end

lib/stripe/event_types.rb

@@ -2,13 +2,27 @@
 
 module Stripe
   module EventTypes
-    def self.thin_event_names_to_classes
+    def self.v2_event_types_to_classes
       {
-        # The beginning of the section generated from our OpenAPI spec
-        V1BillingMeterErrorReportTriggeredEvent.lookup_type => V1BillingMeterErrorReportTriggeredEvent,
-        V1BillingMeterNoMeterFoundEvent.lookup_type => V1BillingMeterNoMeterFoundEvent,
-        V2CoreEventDestinationPingEvent.lookup_type => V2CoreEventDestinationPingEvent,
-        # The end of the section generated from our OpenAPI spec
+        # v2 event types: The beginning of the section generated from our OpenAPI spec
+        Events::V1BillingMeterErrorReportTriggeredEvent.lookup_type =>
+        Events::V1BillingMeterErrorReportTriggeredEvent,
+        Events::V1BillingMeterNoMeterFoundEvent.lookup_type => Events::V1BillingMeterNoMeterFoundEvent,
+        Events::V2CoreEventDestinationPingEvent.lookup_type => Events::V2CoreEventDestinationPingEvent,
+        # v2 event types: The end of the section generated from our OpenAPI spec
+      }
+    end
+
+    def self.event_notification_types_to_classes
+      {
+        # event notification types: The beginning of the section generated from our OpenAPI spec
+        Events::V1BillingMeterErrorReportTriggeredEventNotification.lookup_type =>
+        Events::V1BillingMeterErrorReportTriggeredEventNotification,
+        Events::V1BillingMeterNoMeterFoundEventNotification.lookup_type =>
+        Events::V1BillingMeterNoMeterFoundEventNotification,
+        Events::V2CoreEventDestinationPingEventNotification.lookup_type =>
+        Events::V2CoreEventDestinationPingEventNotification,
+        # event notification types: The end of the section generated from our OpenAPI spec
       }
     end
   end

lib/stripe/events/v1_billing_meter_error_report_triggered_event.rb

@@ -2,22 +2,122 @@
 # frozen_string_literal: true
 
 module Stripe
+  module Events
     # Occurs when a Meter has invalid async usage events.
     class V1BillingMeterErrorReportTriggeredEvent < Stripe::V2::Event
       def self.lookup_type
         "v1.billing.meter.error_report_triggered"
       end
-    # There is additional data present for this event, accessible with the `data` property.
-    # See the Stripe API docs for more information.
 
-    # Retrieves the related object from the API. Make an API request on every call.
+      class V1BillingMeterErrorReportTriggeredEventData < Stripe::StripeObject
+        class Reason < Stripe::StripeObject
+          class ErrorType < Stripe::StripeObject
+            class SampleError < Stripe::StripeObject
+              class Request < Stripe::StripeObject
+                # The request idempotency key.
+                attr_reader :identifier
+
+                def self.inner_class_types
+                  @inner_class_types = {}
+                end
+
+                def self.field_remappings
+                  @field_remappings = {}
+                end
+              end
+              # The error message.
+              attr_reader :error_message
+              # The request causes the error.
+              attr_reader :request
+
+              def self.inner_class_types
+                @inner_class_types = { request: Request }
+              end
+
+              def self.field_remappings
+                @field_remappings = {}
+              end
+            end
+            # Open Enum.
+            attr_reader :code
+            # The number of errors of this type.
+            attr_reader :error_count
+            # A list of sample errors of this type.
+            attr_reader :sample_errors
+
+            def self.inner_class_types
+              @inner_class_types = { sample_errors: SampleError }
+            end
+
+            def self.field_remappings
+              @field_remappings = {}
+            end
+          end
+          # The total error count within this window.
+          attr_reader :error_count
+          # The error details.
+          attr_reader :error_types
+
+          def self.inner_class_types
+            @inner_class_types = { error_types: ErrorType }
+          end
+
+          def self.field_remappings
+            @field_remappings = {}
+          end
+        end
+        # This contains information about why meter error happens.
+        attr_reader :reason
+        # Extra field included in the event's `data` when fetched from /v2/events.
+        attr_reader :developer_message_summary
+        # The start of the window that is encapsulated by this summary.
+        attr_reader :validation_start
+        # The end of the window that is encapsulated by this summary.
+        attr_reader :validation_end
+
+        def self.inner_class_types
+          @inner_class_types = { reason: Reason }
+        end
+
+        def self.field_remappings
+          @field_remappings = {}
+        end
+      end
+
+      def self.inner_class_types
+        @inner_class_types = { data: V1BillingMeterErrorReportTriggeredEventData }
+      end
+      attr_reader :data, :related_object
+
+      # Retrieves the related object from the API. Makes an API request on every call.
       def fetch_related_object
         _request(
           method: :get,
           path: related_object.url,
           base_address: :api,
-        opts: { stripe_account: context }
+          opts: { stripe_context: context }
         )
       end
     end
+
+    # Occurs when a Meter has invalid async usage events.
+    class V1BillingMeterErrorReportTriggeredEventNotification < Stripe::V2::EventNotification
+      def self.lookup_type
+        "v1.billing.meter.error_report_triggered"
+      end
+
+      attr_reader :related_object
+
+      # Retrieves the Meter related to this EventNotification from the Stripe API. Makes an API request on every call.
+      def fetch_related_object
+        resp = @client.raw_request(
+          :get,
+          related_object.url,
+          opts: { stripe_context: context },
+          usage: ["fetch_related_object"]
+        )
+        @client.deserialize(resp.http_body, api_mode: Util.get_api_mode(related_object.url))
+      end
+    end
+  end
 end

lib/stripe/events/v1_billing_meter_no_meter_found_event.rb

@@ -2,12 +2,99 @@
 # frozen_string_literal: true
 
 module Stripe
+  module Events
     # Occurs when a Meter's id is missing or invalid in async usage events.
     class V1BillingMeterNoMeterFoundEvent < Stripe::V2::Event
       def self.lookup_type
         "v1.billing.meter.no_meter_found"
       end
-    # There is additional data present for this event, accessible with the `data` property.
-    # See the Stripe API docs for more information.
+
+      class V1BillingMeterNoMeterFoundEventData < Stripe::StripeObject
+        class Reason < Stripe::StripeObject
+          class ErrorType < Stripe::StripeObject
+            class SampleError < Stripe::StripeObject
+              class Request < Stripe::StripeObject
+                # The request idempotency key.
+                attr_reader :identifier
+
+                def self.inner_class_types
+                  @inner_class_types = {}
+                end
+
+                def self.field_remappings
+                  @field_remappings = {}
+                end
+              end
+              # The error message.
+              attr_reader :error_message
+              # The request causes the error.
+              attr_reader :request
+
+              def self.inner_class_types
+                @inner_class_types = { request: Request }
+              end
+
+              def self.field_remappings
+                @field_remappings = {}
+              end
+            end
+            # Open Enum.
+            attr_reader :code
+            # The number of errors of this type.
+            attr_reader :error_count
+            # A list of sample errors of this type.
+            attr_reader :sample_errors
+
+            def self.inner_class_types
+              @inner_class_types = { sample_errors: SampleError }
+            end
+
+            def self.field_remappings
+              @field_remappings = {}
+            end
+          end
+          # The total error count within this window.
+          attr_reader :error_count
+          # The error details.
+          attr_reader :error_types
+
+          def self.inner_class_types
+            @inner_class_types = { error_types: ErrorType }
+          end
+
+          def self.field_remappings
+            @field_remappings = {}
+          end
+        end
+        # This contains information about why meter error happens.
+        attr_reader :reason
+        # Extra field included in the event's `data` when fetched from /v2/events.
+        attr_reader :developer_message_summary
+        # The start of the window that is encapsulated by this summary.
+        attr_reader :validation_start
+        # The end of the window that is encapsulated by this summary.
+        attr_reader :validation_end
+
+        def self.inner_class_types
+          @inner_class_types = { reason: Reason }
+        end
+
+        def self.field_remappings
+          @field_remappings = {}
+        end
+      end
+
+      def self.inner_class_types
+        @inner_class_types = { data: V1BillingMeterNoMeterFoundEventData }
+      end
+      attr_reader :data
+    end
+
+    # Occurs when a Meter's id is missing or invalid in async usage events.
+    class V1BillingMeterNoMeterFoundEventNotification < Stripe::V2::EventNotification
+      def self.lookup_type
+        "v1.billing.meter.no_meter_found"
+      end
+    end
   end
 end

lib/stripe/events/v2_core_event_destination_ping_event.rb

@@ -2,20 +2,43 @@
 # frozen_string_literal: true
 
 module Stripe
+  module Events
     # A ping event used to test the connection to an EventDestination.
     class V2CoreEventDestinationPingEvent < Stripe::V2::Event
       def self.lookup_type
         "v2.core.event_destination.ping"
       end
 
-    # Retrieves the related object from the API. Make an API request on every call.
+      # Retrieves the related object from the API. Makes an API request on every call.
       def fetch_related_object
         _request(
           method: :get,
           path: related_object.url,
           base_address: :api,
-        opts: { stripe_account: context }
+          opts: { stripe_context: context }
         )
       end
+      attr_reader :related_object
+    end
+
+    # A ping event used to test the connection to an EventDestination.
+    class V2CoreEventDestinationPingEventNotification < Stripe::V2::EventNotification
+      def self.lookup_type
+        "v2.core.event_destination.ping"
+      end
+
+      attr_reader :related_object
+
+      # Retrieves the EventDestination related to this EventNotification from the Stripe API. Makes an API request on every call.
+      def fetch_related_object
+        resp = @client.raw_request(
+          :get,
+          related_object.url,
+          opts: { stripe_context: context },
+          usage: ["fetch_related_object"]
+        )
+        @client.deserialize(resp.http_body, api_mode: Util.get_api_mode(related_object.url))
+      end
+    end
   end
 end

lib/stripe/stripe_client.rb

@@ -59,7 +59,7 @@ module Stripe
     extend Gem::Deprecate
     deprecate :request, :raw_request, 2024, 9
 
-    def parse_thin_event(payload, sig_header, secret, tolerance: Webhook::DEFAULT_TOLERANCE)
+    def parse_event_notification(payload, sig_header, secret, tolerance: Webhook::DEFAULT_TOLERANCE)
       payload = payload.force_encoding("UTF-8") if payload.respond_to?(:force_encoding)
 
       # v2 events use the same signing mechanism as v1 events
@@ -67,15 +67,17 @@ module Stripe
 
       parsed = JSON.parse(payload, symbolize_names: true)
 
-      Stripe::ThinEvent.new(parsed)
+      cls = Util.event_notification_classes.fetch(parsed[:type], Stripe::V2::UnknownEventNotification)
+
+      cls.new(parsed, self)
     end
 
-    def raw_request(method, url, base_address: :api, params: {}, opts: {})
+    def raw_request(method, url, base_address: :api, params: {}, opts: {}, usage: nil)
       opts = Util.normalize_opts(opts)
       req_opts = RequestOptions.extract_opts_from_hash(opts)
 
       params = params.to_h if params.is_a?(Stripe::RequestParams)
-      resp, = @requestor.send(:execute_request_internal, method, url, base_address, params, req_opts, usage: ["raw_request"])
+      resp, = @requestor.send(:execute_request_internal, method, url, base_address, params, req_opts, usage: usage || ["raw_request"])
 
       @requestor.interpret_response(resp)
     end

lib/stripe/thin_event.rb

@@ -1,37 +0,0 @@
-# frozen_string_literal: true
-
-module Stripe
-  class EventReasonRequest
-    attr_reader :id, :idempotency_key
-
-    def initialize(event_reason_request_payload = {})
-      @id = event_reason_request_payload[:id]
-      @idempotency_key = event_reason_request_payload[:idempotency_key]
-    end
-  end
-
-  class EventReason
-    attr_reader :type, :request
-
-    def initialize(event_reason_payload = {})
-      @type = event_reason_payload[:type]
-      @request = EventReasonRequest.new(event_reason_payload[:request])
-    end
-  end
-
-  class ThinEvent
-    attr_reader :id, :type, :created, :context, :related_object, :livemode, :reason
-
-    def initialize(event_payload = {})
-      @id = event_payload[:id]
-      @type = event_payload[:type]
-      @created = event_payload[:created]
-      @context = event_payload[:context]
-      @livemode = event_payload[:livemode]
-      @related_object = event_payload[:related_object]
-      return if event_payload[:reason].nil?
-
-      @reason = EventReason.new(event_payload[:reason])
-    end
-  end
-end

lib/stripe/util.rb

@@ -30,8 +30,12 @@ module Stripe
       @v2_object_classes ||= Stripe::ObjectTypes.v2_object_names_to_classes
     end
 
-    def self.thin_event_classes
-      @thin_event_classes ||= Stripe::EventTypes.thin_event_names_to_classes
+    def self.v2_event_classes
+      @v2_event_classes ||= Stripe::EventTypes.v2_event_types_to_classes
+    end
+
+    def self.event_notification_classes
+      @event_notification_classes ||= Stripe::EventTypes.event_notification_types_to_classes
     end
 
     def self.object_name_matches_class?(object_name, klass)
@@ -137,8 +141,7 @@ module Stripe
         data.map { |i| convert_to_stripe_object(i, opts, api_mode: api_mode, requestor: requestor, klass: klass) }
       when Hash
         # TODO: This is a terrible hack.
-        # Waiting on https://jira.corp.stripe.com/browse/API_SERVICES-3167 to add
-        # an object in v2 lists
+        # Waiting on https://go/j/API_SERVICES-3167 to add an object in v2 lists
         if api_mode == :v2 && data.include?(:data) && data.include?(:next_page_url)
           return V2::ListObject.construct_from(data, opts, last_response, api_mode, requestor)
         end
@@ -152,8 +155,8 @@ module Stripe
                        elsif api_mode == :v2
                          if v2_deleted_object
                            V2::DeletedObject
-                         elsif object_name == "v2.core.event" && thin_event_classes.key?(object_type)
-                           thin_event_classes.fetch(object_type)
+                         elsif object_name == "v2.core.event" && v2_event_classes.key?(object_type)
+                           v2_event_classes.fetch(object_type)
                          else
                            v2_object_classes.fetch(
                              object_name, StripeObject

rbi/stripe/event_notification.rbi

@@ -0,0 +1,41 @@
+# frozen_string_literal: true
+# typed: true
+
+module Stripe
+  module V2
+    class EventReasonRequest
+      sig { returns(String) }
+      def id; end
+      sig { returns(String) }
+      def idempotency_key; end
+
+      sig { params(event_reason_request_payload: T::Hash[T.untyped, T.untyped]).void }
+      def initialize(event_reason_request_payload = {}); end
+    end
+
+    class EventReason
+      sig { returns(String) }
+      def type; end
+      sig { returns(::Stripe::V2::EventReasonRequest) }
+      def request; end
+
+      sig { params(event_reason_payload: T::Hash[T.untyped, T.untyped]).void }
+      def initialize(event_reason_payload = {}); end
+    end
+
+    class EventNotification
+      sig { returns(String) }
+      def id; end
+      sig { returns(String) }
+      def type; end
+      sig { returns(String) }
+      def created; end
+      sig { returns(T.nilable(String)) }
+      def context; end
+      sig { returns(T::Boolean) }
+      def livemode; end
+      sig { returns(T.nilable(::Stripe::V2::EventReason)) }
+      def reason; end
+    end
+  end
+end

rbi/stripe/stripe_client.rbi

@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+# typed: true
+
+module Stripe
+  class StripeClient
+    sig do
+      params(
+        payload: String,
+        sig_header: String,
+        secret: String,
+        tolerance: T.nilable(Integer)
+      )
+        .returns(::Stripe::V2::EventNotification)
+    end
+    def parse_event_notification(payload, sig_header, secret, tolerance:); end
+  end
+end

stripe.gemspec

@@ -27,20 +27,17 @@ Gem::Specification.new do |s|
     "rubygems_mfa_required" => "false",
   }
 
-  ignored = Regexp.union(
-    /\A\.editorconfig/,
-    /\A\.git/,
-    /\A\.rubocop/,
-    /\A\.travis.yml/,
-    /\A\.vscode/,
-    /\Abin/,
-    /\Asorbet/,
-    /\Atest/,
-    # Ignores the contents of rbi/stripe/** but keeps rbi/stripe.rbi
-    # Only rbi/stripe.rbi is included in the gem
-    %r{\Arbi/stripe/}
+  included = Regexp.union(
+    %r{\Alib/},
+    %r{\Aexe/},
+    # generated RBI files
+    %r{\Arbi/stripe\.rbi\z},
+    # Handwritten RBIs
+    # TODO(helenye): http://go/j/DEVSDK-2769
+    %r{\Arbi/stripe/stripe_client.rbi\z},
+    %r{\Arbi/stripe/event_notification.rbi\z}
   )
-  s.files = `git ls-files`.split("\n").grep_v(ignored)
+  s.files = `git ls-files`.split("\n").grep(included)
   s.bindir = "exe"
   s.executables   = `git ls-files -- exe/*`.split("\n").map { |f| File.basename(f) }
   s.require_paths = ["lib"]

test/stripe/v2_event_test.rb

@@ -6,11 +6,7 @@ require "json"
 module Stripe
   class V2EventTest < Test::Unit::TestCase
     def parse_signed_event(payload, secret = Test::WebhookHelpers::SECRET)
-      @client.parse_thin_event(payload, Test::WebhookHelpers.generate_header(payload: payload), secret)
-    end
-
-    def retrieve_event(evt_id)
-      @client.v2.core.events.retrieve(evt_id)
+      @client.parse_event_notification(payload, Test::WebhookHelpers.generate_header(payload: payload), secret)
     end
 
     context "V2 Events" do
@@ -24,6 +20,13 @@ module Stripe
           "created" => "2022-02-15T00:27:45.330Z",
         }.to_json
 
+        @v2_payload_fake_event = {
+          "id" => "evt_234",
+          "object" => "v2.core.event",
+          "type" => "whatever",
+          "created" => "2022-02-15T00:27:45.330Z",
+        }.to_json
+
         @v2_push_payload = {
           "id" => "evt_234",
           "object" => "v2.core.event",
@@ -92,7 +95,7 @@ module Stripe
       context ".event_signing" do
         should "parse v2 events" do
           event = parse_signed_event(@v2_push_payload)
-          assert event.is_a?(Stripe::ThinEvent)
+          assert event.is_a?(Stripe::V2::EventNotification)
           assert_equal "evt_234", event.id
           assert_equal "v1.billing.meter.error_report_triggered", event.type
           assert_equal "2022-02-15T00:27:45.330Z", event.created
@@ -101,7 +104,10 @@ module Stripe
 
         should "parse v2 events with livemode and reason" do
           event = parse_signed_event(@v2_push_payload_with_livemode_and_reason)
-          assert event.is_a?(Stripe::ThinEvent)
+          assert event.is_a?(Stripe::V2::EventNotification)
+          assert event.related_object.is_a?(Stripe::V2::RelatedObject)
+          assert event.reason.is_a?(Stripe::V2::EventReason)
+
           assert_equal "evt_234", event.id
           assert_equal "v1.billing.meter.error_report_triggered", event.type
           assert_equal "2022-02-15T00:27:45.330Z", event.created
@@ -119,35 +125,52 @@ module Stripe
         end
       end
 
-      should "retrieve event data" do
-        event = parse_signed_event(@v2_push_payload)
-        assert event.is_a?(Stripe::ThinEvent)
+      context "Event notifications" do
+        should "parse event notifications and pull data" do
+          event_notif = parse_signed_event(@v2_push_payload)
+          assert event_notif.instance_of?(Stripe::Events::V1BillingMeterErrorReportTriggeredEventNotification)
 
-        stub_request(:get, "#{Stripe::DEFAULT_API_BASE}/v2/core/events/evt_234")
-          .to_return(body: @v2_pull_payload)
-        ret_event = retrieve_event(event.id)
-        assert ret_event.is_a?(Stripe::V1BillingMeterErrorReportTriggeredEvent)
-
-        assert ret_event.data.error == "bufo"
-        assert ret_event.data.reason.error_types[0].code == "meter_event_invalid_value"
-      end
-
-      should "fetch object" do
           stub_request(:get, "#{Stripe::DEFAULT_API_BASE}/v1/billing/meters/mtr_123")
             .to_return(body: JSON.generate({ "id" => "mtr_123", "object" => "billing.meter" }))
           stub_request(:get, "#{Stripe::DEFAULT_API_BASE}/v2/core/events/evt_234")
             .to_return(body: @v2_pull_payload)
 
-        event = parse_signed_event(@v2_push_payload)
-        assert event.is_a?(Stripe::ThinEvent)
+          meter = event_notif.fetch_related_object
+          assert meter.instance_of?(Stripe::Billing::Meter)
+          assert meter.id == "mtr_123"
 
-        ret_event = retrieve_event(event.id)
-        assert ret_event.is_a?(Stripe::V1BillingMeterErrorReportTriggeredEvent)
+          event = event_notif.fetch_event
+          assert event.is_a?(Stripe::Events::V1BillingMeterErrorReportTriggeredEvent)
+          assert_equal "a", event.data.reason.error_types.first.sample_errors.first.request.identifier
+        end
 
-        mtr = @client.v1.billing.meters.retrieve("mtr_123")
+        should "correctly retrieve events" do
+          event_notif = parse_signed_event(@v2_push_payload)
+          stub_request(:get, "#{Stripe::DEFAULT_API_BASE}/v2/core/events/evt_234")
+            .to_return(body: @v2_pull_payload)
 
-        assert mtr.is_a?(Stripe::Billing::Meter)
-        assert mtr.id == "mtr_123"
+          event = @client.v2.core.events.retrieve(event_notif.id)
+
+          assert event.is_a?(Stripe::Events::V1BillingMeterErrorReportTriggeredEvent)
+          assert event.data.error == "bufo"
+          assert event.data.reason.error_types[0].code == "meter_event_invalid_value"
+        end
+
+        should "parse unknown events" do
+          event_notif = parse_signed_event(@v2_payload_fake_event)
+          assert event_notif.instance_of?(Stripe::V2::UnknownEventNotification)
+
+          stub_request(:get, "#{Stripe::DEFAULT_API_BASE}/v2/core/events/evt_234")
+            .to_return(body: {
+              "id" => "evt_234",
+              "object" => "v2.core.event",
+              "type" => "whatever",
+              "created" => "2022-02-15T00:27:45.330Z",
+            }.to_json)
+
+          event = event_notif.fetch_event
+          assert event.instance_of?(Stripe::V2::Event)
+        end
       end
     end
   end