fix: #246 bug object type root object is missing on webhook (#247)

* fix: #246 add object type root key in webhook payload

* add spec to avoid regression

app/services/webhooks/base_service.rb

@@ -12,11 +12,11 @@ def initialize(object)
     def call
       return unless current_organization&.webhook_url?
 
-      payload = object_serializer.serialize
-      payload = payload.merge(
+      payload = {
         webhook_type: webhook_type,
         object_type: object_type,
-      )
+        object_type => object_serializer.serialize,
+      }
 
       http_client = LagoHttpClient::Client.new(current_organization.webhook_url)
       headers = generate_headers(payload)

spec/services/webhooks/invoices_service_spec.rb

@@ -44,6 +44,16 @@
       end
     end
 
+    it 'builds payload with the object type root key' do
+      webhook_invoice_service.call
+
+      expect(LagoHttpClient::Client).to have_received(:new)
+        .with(organization.webhook_url)
+      expect(lago_client).to have_received(:post) do |payload|
+        expect(payload['invoice']).to be_present
+      end
+    end
+
     context 'without webhook_url' do
       let(:webhook_url) { nil }