diff --git a/proto/sharing_enums.proto b/proto/sharing_enums.proto
index b43a82bc..f6803167 100644
--- a/proto/sharing_enums.proto
+++ b/proto/sharing_enums.proto
@@ -160,6 +160,9 @@ enum EventType {
 
   // Receiver verification of APKs status.
   VERIFY_APK = 41;
+
+  // User starts a consent.
+  LAUNCH_CONSENT = 42;
 }
 
 // Event category to differentiate whether this comes from sender or receiver,
@@ -340,6 +343,12 @@ enum ActivityName {
   CONSENTS_ACTIVITY = 6;
 }
 
+enum ConsentType {
+  CONSENT_TYPE_UNKNOWN = 0;
+
+  CONSENT_TYPE_C11N = 1;
+}
+
 enum ApkSource {
   UNKNOWN_APK_SOURCE = 0;