diff --git a/ng-net/src/types.rs b/ng-net/src/types.rs
index 205a3bd..6c755e2 100644
--- a/ng-net/src/types.rs
+++ b/ng-net/src/types.rs
@@ -3067,7 +3067,7 @@ impl ObjectDel {
     }
 }
 
-/// Request to delete an object
+/// Request to publish an event in pubsub
 #[derive(Clone, Debug, Serialize, Deserialize)]
 pub struct PublishEvent(pub Event, #[serde(skip)] pub Option<OverlayId>);
 
diff --git a/ng-repo/src/branch.rs b/ng-repo/src/branch.rs
index 961acf7..a163aa5 100644
--- a/ng-repo/src/branch.rs
+++ b/ng-repo/src/branch.rs
@@ -39,6 +39,7 @@ impl BranchV0 {
             root_branch_readcap_id,
             topic,
             topic_privkey,
+            pulled_from: vec![],
             metadata,
         }
     }
diff --git a/ng-repo/src/commit.rs b/ng-repo/src/commit.rs
index 12171ad..7eb3575 100644
--- a/ng-repo/src/commit.rs
+++ b/ng-repo/src/commit.rs
@@ -1592,12 +1592,7 @@ mod test {
 
         let metadata = Vec::from("some metadata");
 
-        let body = CommitBody::V0(CommitBodyV0::Repository(Repository::V0(RepositoryV0 {
-            id: branch,
-            verification_program: vec![],
-            creator: None,
-            metadata: vec![],
-        })));
+        let body = CommitBody::V0(CommitBodyV0::Repository(Repository::new(&branch)));
 
         let max_object_size = 0;
 
@@ -1708,12 +1703,7 @@ mod test {
 
         let metadata = Vec::from("some metadata");
 
-        let body = CommitBody::V0(CommitBodyV0::Repository(Repository::V0(RepositoryV0 {
-            id: branch,
-            verification_program: vec![],
-            creator: None,
-            metadata: vec![],
-        })));
+        let body = CommitBody::V0(CommitBodyV0::Repository(Repository::new(&branch)));
 
         let max_object_size = 0;
 
diff --git a/ng-repo/src/repo.rs b/ng-repo/src/repo.rs
index 4c976a7..f0c2144 100644
--- a/ng-repo/src/repo.rs
+++ b/ng-repo/src/repo.rs
@@ -25,19 +25,29 @@ use std::collections::HashSet;
 use std::sync::Arc;
 
 impl RepositoryV0 {
-    pub fn new(id: &PubKey, metadata: &Vec<u8>) -> RepositoryV0 {
+    pub fn new_with_meta(id: &PubKey, metadata: &Vec<u8>) -> RepositoryV0 {
         RepositoryV0 {
             id: id.clone(),
             metadata: metadata.clone(),
             verification_program: vec![],
+            fork_of: vec![],
             creator: None,
         }
     }
 }
 
 impl Repository {
-    pub fn new(id: &PubKey, metadata: &Vec<u8>) -> Repository {
-        Repository::V0(RepositoryV0::new(id, metadata))
+    pub fn new(id: &RepoId) -> Self {
+        Repository::V0(RepositoryV0 {
+            id: id.clone(),
+            verification_program: vec![],
+            creator: None,
+            fork_of: vec![],
+            metadata: vec![],
+        })
+    }
+    pub fn new_with_meta(id: &PubKey, metadata: &Vec<u8>) -> Repository {
+        Repository::V0(RepositoryV0::new_with_meta(id, metadata))
     }
     pub fn id(&self) -> &PubKey {
         match self {
@@ -178,7 +188,7 @@ impl Repo {
         );
         Self {
             id: id.clone(),
-            repo_def: Repository::new(id, &vec![]),
+            repo_def: Repository::new(&id),
             members,
             store,
             signer: None,
diff --git a/ng-repo/src/store.rs b/ng-repo/src/store.rs
index cd88cf8..58b3ce2 100644
--- a/ng-repo/src/store.rs
+++ b/ng-repo/src/store.rs
@@ -173,6 +173,7 @@ impl Store {
                 branch_pub_key,
                 repo_write_cap_secret,
             ),
+            pulled_from: vec![],
             metadata: vec![],
         })));
 
@@ -266,12 +267,7 @@ impl Store {
 
         // creating the Repository commit
 
-        let repository = Repository::V0(RepositoryV0 {
-            id: repo_pub_key,
-            verification_program: vec![],
-            creator: None,
-            metadata: vec![],
-        });
+        let repository = Repository::new(&repo_pub_key);
 
         let repository_commit_body = CommitBody::V0(CommitBodyV0::Repository(repository.clone()));
 
diff --git a/ng-repo/src/types.rs b/ng-repo/src/types.rs
index 19c839c..31fe757 100644
--- a/ng-repo/src/types.rs
+++ b/ng-repo/src/types.rs
@@ -1020,6 +1020,11 @@ pub struct RepositoryV0 {
     #[serde(with = "serde_bytes")]
     pub verification_program: Vec<u8>,
 
+    /// Optional serialization of a ReadBranchLink (of a rootbranch or a transactional branch), if the repository is a fork of another one.
+    /// then transaction branches of this new repo, will be able to reference the forked repo/branches commits as DEPS in their singleton Branch commit.
+    #[serde(with = "serde_bytes")]
+    pub fork_of: Vec<u8>,
+
     /// User ID who created this repo
     pub creator: Option<UserId>,
 
@@ -1246,7 +1251,7 @@ pub enum BranchContentType {
 /// the previous branch heads, and the ACKS are empty.
 ///
 /// Can be used also to update the branch definition when users are removed
-/// In this case, the total_order quorum is needed, and DEPS indicates the previous branch definition, ACKS indicate the current HEAD
+/// In this case, the total_order quorum is needed, and DEPS indicates the BranchCapRefresh commit
 #[derive(Clone, Debug, Serialize, Deserialize, PartialEq, Eq)]
 pub struct BranchV0 {
     /// Branch public key ID
@@ -1273,6 +1278,11 @@ pub struct BranchV0 {
     #[serde(with = "serde_bytes")]
     pub topic_privkey: Vec<u8>,
 
+    /// optional: this branch is the result of a pull request coming from another repo.
+    /// contains a serialization of a ReadBranchLink of a transactional branch from another repo
+    #[serde(with = "serde_bytes")]
+    pub pulled_from: Vec<u8>,
+
     /// App-specific metadata
     #[serde(with = "serde_bytes")]
     pub metadata: Vec<u8>,
@@ -1859,6 +1869,10 @@ pub struct CompactV0 {
     // Branch heads the snapshot was made from, can be useful when shared outside and the commit_header_key is set to None. otherwise it is redundant to ACKS
     pub heads: Vec<ObjectId>,
 
+    // optional serialization of a ReadBranchLink, if the snapshot is made from another repo.
+    #[serde(with = "serde_bytes")]
+    pub origin: Vec<u8>,
+
     /// Snapshot data structure
     #[serde(with = "serde_bytes")]
     pub content: Vec<u8>,