2 files changed, 30 insertions, 0 deletions
diff --git a/internal/typeutils/internaltoas.go b/internal/typeutils/internaltoas.go
index d317d6f39..d9d18e1c7 100644
--- a/internal/typeutils/internaltoas.go
+++ b/internal/typeutils/internaltoas.go
@@ -1988,6 +1988,16 @@ func (c *Converter) InteractionReqToASAccept(
 		return nil, gtserror.Newf("invalid interacting account uri: %w", err)
 	}
 
+	publicIRI, err := url.Parse(pub.PublicActivityPubIRI)
+	if err != nil {
+		return nil, gtserror.Newf("invalid public uri: %w", err)
+	}
+
+	followersIRI, err := url.Parse(req.TargetAccount.FollowersURI)
+	if err != nil {
+		return nil, gtserror.Newf("invalid followers uri: %w", err)
+	}
+
 	// Set id to the URI of
 	// interaction request.
 	ap.SetJSONLDId(accept, acceptID)
@@ -2003,6 +2013,9 @@ func (c *Converter) InteractionReqToASAccept(
 	// of interaction URI.
 	ap.AppendTo(accept, toIRI)
 
+	// Cc to the actor's followers, and to Public.
+	ap.AppendCc(accept, publicIRI, followersIRI)
+
 	return accept, nil
 }
 
@@ -2034,6 +2047,16 @@ func (c *Converter) InteractionReqToASReject(
 		return nil, gtserror.Newf("invalid interacting account uri: %w", err)
 	}
 
+	publicIRI, err := url.Parse(pub.PublicActivityPubIRI)
+	if err != nil {
+		return nil, gtserror.Newf("invalid public uri: %w", err)
+	}
+
+	followersIRI, err := url.Parse(req.TargetAccount.FollowersURI)
+	if err != nil {
+		return nil, gtserror.Newf("invalid followers uri: %w", err)
+	}
+
 	// Set id to the URI of
 	// interaction request.
 	ap.SetJSONLDId(reject, rejectID)
@@ -2049,5 +2072,8 @@ func (c *Converter) InteractionReqToASReject(
 	// of interaction URI.
 	ap.AppendTo(reject, toIRI)
 
+	// Cc to the actor's followers, and to Public.
+	ap.AppendCc(reject, publicIRI, followersIRI)
+
 	return reject, nil
 }
diff --git a/internal/typeutils/internaltoas_test.go b/internal/typeutils/internaltoas_test.go
index f10685aee..d0ed4204c 100644
--- a/internal/typeutils/internaltoas_test.go
+++ b/internal/typeutils/internaltoas_test.go
@@ -1181,6 +1181,10 @@ func (suite *InternalToASTestSuite) TestInteractionReqToASAccept() {
 	suite.Equal(`{
   "@context": "https://www.w3.org/ns/activitystreams",
   "actor": "http://localhost:8080/users/the_mighty_zork",
+  "cc": [
+    "https://www.w3.org/ns/activitystreams#Public",
+    "http://localhost:8080/users/the_mighty_zork/followers"
+  ],
   "id": "http://localhost:8080/users/the_mighty_zork/accepts/01J1AKMZ8JE5NW0ZSFTRC1JJNE",
   "object": "https://fossbros-anonymous.io/users/foss_satan/statuses/01J1AKRRHQ6MDDQHV0TP716T2K",
   "to": "http://fossbros-anonymous.io/users/foss_satan",