branch_history API

ng-net/src/app_protocol.rs

@@ -9,7 +9,10 @@
 
 //! App Protocol (between LocalBroker and Verifier)
 
+use std::collections::HashMap;
+
 use lazy_static::lazy_static;
+use ng_repo::repo::CommitInfo;
 use ng_repo::utils::decode_overlayid;
 use regex::Regex;
 use serde::{Deserialize, Serialize};
@@ -46,6 +49,7 @@ pub enum AppFetchContentV0 {
     ReadQuery,  // more to be detailed
     WriteQuery, // more to be detailed
     RdfDump,
+    History,
 }
 
 impl AppFetchContentV0 {
@@ -134,6 +138,29 @@ impl NuriTargetV0 {
     }
 }
 
+#[derive(Clone, Debug, Serialize, Deserialize, PartialEq, Eq)]
+pub struct CommitInfoJs {
+    pub past: Vec<String>,
+    pub key: String,
+    pub signature: Option<String>,
+    pub author: String,
+    pub final_consistency: bool,
+    pub commit_type: CommitType,
+}
+
+impl From<&CommitInfo> for CommitInfoJs {
+    fn from(info: &CommitInfo) -> Self {
+        CommitInfoJs {
+            past: info.past.iter().map(|objid| objid.to_string()).collect(),
+            key: info.key.to_string(),
+            signature: info.signature.as_ref().map(|s| NuriV0::object_ref(&s)),
+            author: info.author.clone(),
+            final_consistency: info.final_consistency,
+            commit_type: info.commit_type.clone(),
+        }
+    }
+}
+
 const DID_PREFIX: &str = "did:ng";
 
 #[derive(Clone, Debug, Serialize, Deserialize)]
@@ -180,6 +207,10 @@ impl NuriV0 {
         format!("{DID_PREFIX}:b:{branch_base64}")
     }
 
+    pub fn object_ref(obj_ref: &ObjectRef) -> String {
+        format!("{DID_PREFIX}{}", obj_ref.nuri())
+    }
+
     pub fn token(token: &Digest) -> String {
         format!("{DID_PREFIX}:n:{token}")
     }
@@ -361,6 +392,9 @@ impl AppRequestCommandV0 {
     pub fn new_rdf_dump() -> Self {
         AppRequestCommandV0::Fetch(AppFetchContentV0::RdfDump)
     }
+    pub fn new_history() -> Self {
+        AppRequestCommandV0::Fetch(AppFetchContentV0::History)
+    }
 }
 
 #[derive(Clone, Debug, Serialize, Deserialize)]
@@ -603,20 +637,57 @@ pub struct GraphState {
 
 #[derive(Clone, Debug, Serialize, Deserialize)]
 pub struct AppState {
-    heads: Vec<ObjectId>,
+    pub heads: Vec<ObjectId>,
-    graph: Option<GraphState>, // there is always a graph present in the branch. but it might not have been asked in the request
+    pub graph: Option<GraphState>, // there is always a graph present in the branch. but it might not have been asked in the request
-    discrete: Option<DiscreteState>,
+    pub discrete: Option<DiscreteState>,
+    pub files: Vec<FileName>,
 }
+
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct AppHistory {
+    pub heads: Vec<ObjectId>,
+    pub history: HashMap<ObjectId, CommitInfo>,
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct AppHistoryJs {
+    pub heads: Vec<String>,
+    pub history: HashMap<String, CommitInfoJs>,
+}
+
+impl AppHistory {
+    pub fn to_js(&self) -> AppHistoryJs {
+        AppHistoryJs {
+            heads: self.heads.iter().map(|h| h.to_string()).collect(),
+            history: HashMap::from_iter(
+                self.history
+                    .iter()
+                    .map(|(id, info)| (id.to_string(), info.into())),
+            ),
+        }
+    }
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub enum OtherPatch {
+    FileAdd(FileName),
+    FileRemove(ObjectId),
+    AsyncSignature((ObjectRef, Vec<ObjectId>)),
+    Other,
+}
+
 #[derive(Clone, Debug, Serialize, Deserialize)]
 pub struct AppPatch {
-    heads: Vec<ObjectId>,
+    pub commit_id: ObjectId,
-    graph: Option<GraphPatch>,
+    pub commit_info: CommitInfo,
-    discrete: Option<DiscretePatch>,
+    // or graph, or discrete, or both, or other.
+    pub graph: Option<GraphPatch>,
+    pub discrete: Option<DiscretePatch>,
+    pub other: Option<OtherPatch>,
 }
 
 #[derive(Clone, Debug, Serialize, Deserialize)]
 pub struct FileName {
-    pub heads: Vec<ObjectId>,
     pub name: Option<String>,
     pub reference: ObjectRef,
     pub nuri: String,
@@ -633,8 +704,9 @@ pub enum AppResponseV0 {
     SessionStart(AppSessionStartResponse),
     State(AppState),
     Patch(AppPatch),
+    History(AppHistory),
     Text(String),
-    File(FileName),
+    //File(FileName),
     FileUploading(u32),
     FileUploaded(ObjectRef),
     #[serde(with = "serde_bytes")]

ng-repo/src/branch.rs

@@ -178,7 +178,7 @@ impl Branch {
     ///
     /// and collect in `visited` the ObjectIds encountered on the way, stopping at any commit already belonging to `theirs` or the root of DAG.
     /// optionally collecting the missing objects/blocks that couldn't be found locally on the way,
-    /// and also optionally, collecting the commits of theirs found on the way
+    /// and also optionally, collecting the commits of `theirs` found on the way
     pub fn load_causal_past(
         cobj: &Object,
         store: &Store,

ng-repo/src/commit.rs

@@ -20,6 +20,7 @@ use crate::errors::*;
 #[allow(unused_imports)]
 use crate::log::*;
 use crate::object::*;
+use crate::repo::CommitInfo;
 use crate::repo::Repo;
 use crate::store::Store;
 use crate::types::*;
@@ -322,7 +323,7 @@ impl Commit {
                         _ => return Err(CommitLoadError::NotACommit),
                     };
                     commit.set_id(id);
-                    commit.set_key(key.clone());
+                    commit.set_key(key);
                     match commit.load_body(store) {
                         Ok(_) => return Err(CommitLoadError::MissingBlocks(missing)),
                         Err(CommitLoadError::MissingBlocks(mut missing_body)) => {
@@ -344,7 +345,7 @@ impl Commit {
                     _ => return Err(CommitLoadError::NotACommit),
                 };
                 commit.set_id(id);
-                commit.set_key(key.clone());
+                commit.set_key(key);
                 commit.set_header(obj.header().clone());
 
                 if with_body {
@@ -429,6 +430,34 @@ impl Commit {
         }
     }
 
+    /// Get author (a UserId)
+    pub fn author(&self) -> &Digest {
+        self.content().author()
+    }
+
+    pub fn final_consistency(&self) -> bool {
+        self.content().final_consistency()
+    }
+
+    pub fn get_type(&self) -> Option<CommitType> {
+        self.body().map(|b| b.get_type())
+    }
+
+    pub fn get_signature_reference(&self) -> Option<ObjectRef> {
+        self.body().map_or(None, |b| b.get_signature_reference())
+    }
+
+    pub fn as_info(&self, repo: &Repo) -> CommitInfo {
+        CommitInfo {
+            past: self.acks_ids(),
+            key: self.key().unwrap(),
+            signature: None,
+            author: repo.get_user_string(self.author()),
+            final_consistency: self.final_consistency(),
+            commit_type: self.get_type().unwrap(),
+        }
+    }
+
     /// Get branch ID this commit is about
     pub fn branch(&self) -> &BranchId {
         self.content().branch()
@@ -538,6 +567,28 @@ impl Commit {
         res
     }
 
+    /// Get acks (that have an ID in the header, without checking if there is a key for them in the header_keys)
+    /// if there is no header, returns an empty vec
+    pub fn acks_ids(&self) -> Vec<ObjectId> {
+        match self {
+            Commit::V0(c) => match &c.header {
+                Some(h) => h.acks(),
+                None => vec![],
+            },
+        }
+    }
+
+    /// Get deps (that have an ID in the header, without checking if there is a key for them in the header_keys)
+    /// if there is no header, returns an empty vec
+    pub fn deps_ids(&self) -> Vec<ObjectId> {
+        match self {
+            Commit::V0(c) => match &c.header {
+                Some(h) => h.deps(),
+                None => vec![],
+            },
+        }
+    }
+
     /// Get files
     pub fn files(&self) -> Vec<ObjectRef> {
         let mut res: Vec<ObjectRef> = vec![];

ng-repo/src/object.rs

@@ -1004,6 +1004,7 @@ impl fmt::Display for ObjectContent {
                         ("RandomAccessFileMeta", format!("{}", ""))
                     }
                     ObjectContentV0::RefreshCap(_c) => ("RefreshCap", format!("{}", "")),
+                    ObjectContentV0::Snapshot(_c) => ("Snapshot", format!("size={}", _c.len())),
                 },
             ),
         };

ng-repo/src/repo.rs

@@ -14,6 +14,8 @@ use std::collections::HashMap;
 use std::collections::HashSet;
 use std::sync::Arc;
 
+use serde::{Deserialize, Serialize};
+
 use crate::errors::*;
 #[allow(unused_imports)]
 use crate::log::*;
@@ -153,6 +155,16 @@ impl fmt::Display for Repo {
     }
 }
 
+#[derive(Clone, Debug, Serialize, Deserialize, PartialEq, Eq)]
+pub struct CommitInfo {
+    pub past: Vec<ObjectId>,
+    pub key: ObjectKey,
+    pub signature: Option<ObjectRef>,
+    pub author: String,
+    pub final_consistency: bool,
+    pub commit_type: CommitType,
+}
+
 impl Repo {
     #[cfg(any(test, feature = "testing"))]
     #[allow(deprecated)]
@@ -161,6 +173,92 @@ impl Repo {
         Self::new_with_member(&pub_key, &pub_key, perms, store)
     }
 
+    pub(crate) fn get_user_string(&self, user_hash: &Digest) -> String {
+        self.members
+            .get(user_hash)
+            .map_or_else(|| format!("t:{user_hash}"), |info| format!("i:{}", info.id))
+    }
+
+    fn load_causal_past(
+        &self,
+        cobj: &Commit,
+        visited: &mut HashMap<ObjectId, CommitInfo>,
+    ) -> Result<(), VerifierError> {
+        let id = cobj.id().unwrap();
+        if visited.get(&id).is_none() {
+            let commit_type = cobj.get_type().unwrap();
+            let acks = cobj.acks();
+            let (past, real_acks) = match commit_type {
+                CommitType::SyncSignature => {
+                    assert_eq!(acks.len(), 1);
+                    let dep = cobj.deps();
+                    assert_eq!(dep.len(), 1);
+                    let mut current_commit = dep[0].clone();
+                    let sign_ref = cobj.get_signature_reference().unwrap();
+                    let real_acks;
+                    loop {
+                        let o = Commit::load(current_commit.clone(), &self.store, true)?;
+                        let deps = o.deps();
+                        let commit_info = CommitInfo {
+                            past: deps.iter().map(|r| r.id.clone()).collect(),
+                            key: o.key().unwrap(),
+                            signature: Some(sign_ref.clone()),
+                            author: self.get_user_string(o.author()),
+                            final_consistency: o.final_consistency(),
+                            commit_type: o.get_type().unwrap(),
+                        };
+                        let id = o.id().unwrap();
+                        visited.insert(id, commit_info);
+                        if id == acks[0].id {
+                            real_acks = o.acks();
+                            break;
+                        }
+                        assert_eq!(deps.len(), 1);
+                        current_commit = deps[0].clone();
+                    }
+                    (vec![dep[0].id], real_acks)
+                }
+                CommitType::AsyncSignature => {
+                    let past: Vec<ObjectId> = acks.iter().map(|r| r.id.clone()).collect();
+                    for p in past.iter() {
+                        visited.get_mut(p).unwrap().signature =
+                            Some(cobj.get_signature_reference().unwrap());
+                    }
+                    (past, acks)
+                }
+                _ => (acks.iter().map(|r| r.id.clone()).collect(), acks),
+            };
+
+            let commit_info = CommitInfo {
+                past,
+                key: cobj.key().unwrap(),
+                signature: None,
+                author: self.get_user_string(cobj.author()),
+                final_consistency: cobj.final_consistency(),
+                commit_type,
+            };
+            visited.insert(id, commit_info);
+            for past_ref in real_acks {
+                let o = Commit::load(past_ref, &self.store, true)?;
+                self.load_causal_past(&o, visited)?;
+            }
+        }
+        Ok(())
+    }
+
+    pub fn history_at_heads(
+        &self,
+        heads: &[ObjectRef],
+    ) -> Result<HashMap<ObjectId, CommitInfo>, VerifierError> {
+        let mut res = HashMap::new();
+        for id in heads {
+            if let Ok(cobj) = Commit::load(id.clone(), &self.store, true) {
+                self.load_causal_past(&cobj, &mut res)?;
+            }
+        }
+        Ok(res)
+    }
+
     pub fn update_branch_current_heads(
         &mut self,
         branch: &BranchId,

ng-repo/src/types.rs

@@ -1927,9 +1927,8 @@ pub struct SnapshotV0 {
     // 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>,
 
-    /// Snapshot data structure
+    /// Reference to Object containing Snapshot data structure
-    #[serde(with = "serde_bytes")]
+    pub content: ObjectRef,
-    pub content: Vec<u8>,
 }
 
 /// Snapshot of a Branch
@@ -1957,9 +1956,8 @@ pub struct CompactV0 {
     #[serde(with = "serde_bytes")]
     pub origin: Vec<u8>,
 
-    /// Snapshot data structure
+    /// Reference to Object containing Snapshot data structure
-    #[serde(with = "serde_bytes")]
+    pub content: ObjectRef,
-    pub content: Vec<u8>,
 }
 
 /// Snapshot of a Branch
@@ -1989,6 +1987,11 @@ impl AsyncSignature {
         // check that the signature object referenced here, is of type threshold_sig Partial
         unimplemented!();
     }
+    pub fn reference(&self) -> &ObjectRef {
+        match self {
+            Self::V0(v0) => v0,
+        }
+    }
 }
 
 /// Sync Threshold Signature of one or a chain of commits . V0
@@ -2013,6 +2016,11 @@ impl SyncSignature {
         // check that the signature object referenced here, is of type threshold_sig Total or Owner
         unimplemented!();
     }
+    pub fn reference(&self) -> &ObjectRef {
+        match self {
+            Self::V0(v0) => v0,
+        }
+    }
 }
 
 impl fmt::Display for SyncSignature {
@@ -2347,6 +2355,72 @@ pub enum QuorumType {
     IamTheSignature,
 }
 
+impl QuorumType {
+    pub fn final_consistency(&self) -> bool {
+        match self {
+            Self::TotalOrder | Self::Owners | Self::IamTheSignature => true,
+            _ => false,
+        }
+    }
+}
+
+impl CommitBody {
+    pub fn get_type(&self) -> CommitType {
+        match self {
+            Self::V0(v0) => v0.get_type(),
+        }
+    }
+    pub fn get_signature_reference(&self) -> Option<ObjectRef> {
+        match self {
+            Self::V0(v0) => v0.get_signature_reference(),
+        }
+    }
+}
+
+impl CommitBodyV0 {
+    pub fn get_type(&self) -> CommitType {
+        match self {
+            Self::Branch(_) => CommitType::Branch,
+            Self::BranchCapRefresh(_) => CommitType::BranchCapRefresh,
+            Self::UpdateBranch(_) => CommitType::UpdateBranch,
+            Self::Snapshot(_) => CommitType::Snapshot,
+            Self::AsyncTransaction(_) => CommitType::Transaction,
+            Self::SyncTransaction(_) => CommitType::Transaction,
+            Self::AddFile(_) => CommitType::FileAdd,
+            Self::RemoveFile(_) => CommitType::FileRemove,
+            Self::Compact(_) => CommitType::Compact,
+            Self::AsyncSignature(_) => CommitType::AsyncSignature,
+            Self::CapRefreshed(_) => CommitType::CapRefreshed,
+            Self::SyncSignature(_) => CommitType::SyncSignature,
+            _ => CommitType::Other,
+        }
+    }
+
+    pub fn get_signature_reference(&self) -> Option<ObjectRef> {
+        match self {
+            Self::AsyncSignature(s) => Some(s.reference().clone()),
+            Self::SyncSignature(s) => Some(s.reference().clone()),
+            _ => None,
+        }
+    }
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize, PartialEq, Eq)]
+pub enum CommitType {
+    Transaction,
+    FileAdd,
+    FileRemove,
+    Snapshot,
+    Compact,
+    AsyncSignature,
+    SyncSignature,
+    Branch,
+    UpdateBranch,
+    BranchCapRefresh,
+    CapRefreshed,
+    Other,
+}
+
 /// Content of a Commit
 #[derive(Clone, Debug, Serialize, Deserialize, PartialEq, Eq)]
 pub struct CommitContentV0 {
@@ -2404,6 +2478,12 @@ impl CommitContent {
         }
     }
 
+    pub fn final_consistency(&self) -> bool {
+        match self {
+            CommitContent::V0(v0) => v0.quorum.final_consistency(),
+        }
+    }
+
     pub fn author_digest(author: &UserId, overlay: OverlayId) -> Digest {
         let author_id = serde_bare::to_vec(author).unwrap();
         let overlay_id = serde_bare::to_vec(&overlay).unwrap();
@@ -2445,7 +2525,7 @@ pub struct CommitV0 {
     /// Commit content
     pub content: CommitContent,
 
-    /// Signature over the content (a CommitContent) by the author. an editor (userId)
+    /// Signature over the content (a CommitContent) by the author. an editor (UserId)
     pub sig: Sig,
 }
 
@@ -2562,6 +2642,8 @@ pub enum ObjectContentV0 {
     SmallFile(SmallFile),
     RandomAccessFileMeta(RandomAccessFileMeta),
     RefreshCap(RefreshCap),
+    #[serde(with = "serde_bytes")]
+    Snapshot(Vec<u8>), // serialization of an AppState
 }
 
 /// Immutable data stored encrypted in a Merkle tree

ng-sdk-js/app-node/index.js

@@ -39,6 +39,9 @@ ng.init_headless(config).then( async() => {
             console.log(q);
         }
 
+        let history = await ng.branch_history(session.session_id);
+        console.log(history);
+
         // await ng.sparql_update(session.session_id, "DELETE DATA { <did:ng:t:AJQ5gCLoXXjalC9diTDCvxxWu5ZQUcYWEE821nhVRMcE> <did:ng:i> <did:ng:j> }");
 
         // await ng.sparql_update(session.session_id, "INSERT DATA { <did:ng:t:AJQ5gCLoXXjalC9diTDCvxxWu5ZQUcYWEE821nhVRMcE> <did:ng:i> <did:ng:j> }");

ng-sdk-js/src/lib.rs

@@ -287,6 +287,33 @@ pub async fn rdf_dump(session_id: JsValue) -> Result<String, String> {
     }
 }
 
+#[cfg(wasmpack_target = "nodejs")]
+#[wasm_bindgen]
+pub async fn branch_history(session_id: JsValue) -> Result<JsValue, String> {
+    let session_id: u64 = serde_wasm_bindgen::from_value::<u64>(session_id)
+        .map_err(|_| "Invalid session_id".to_string())?;
+
+    let request = AppRequest::V0(AppRequestV0 {
+        command: AppRequestCommandV0::new_history(),
+        nuri: NuriV0::new_private_store_target(),
+        payload: None,
+        session_id,
+    });
+
+    let res = nextgraph::local_broker::app_request(request)
+        .await
+        .map_err(|e: NgError| e.to_string())?;
+
+    let AppResponse::V0(res) = res;
+    match res {
+        AppResponseV0::History(s) => Ok(s
+            .to_js()
+            .serialize(&serde_wasm_bindgen::Serializer::new().serialize_maps_as_objects(true))
+            .unwrap()),
+        _ => Err("invalid response".to_string()),
+    }
+}
+
 #[cfg(wasmpack_target = "nodejs")]
 #[wasm_bindgen]
 pub async fn admin_create_user(config: JsValue) -> Result<JsValue, String> {

ng-verifier/src/commits/mod.rs

@@ -18,7 +18,7 @@ use ng_repo::errors::VerifierError;
 #[allow(unused_imports)]
 use ng_repo::log::*;
 use ng_repo::object::Object;
-use ng_repo::repo::{BranchInfo, Repo};
+use ng_repo::repo::{BranchInfo, CommitInfo, Repo};
 use ng_repo::store::Store;
 use ng_repo::types::*;
 
@@ -452,18 +452,28 @@ impl CommitVerifier for AddFile {
         if files.len() == 1 {
             let refe = commit.files().remove(0);
             let filename = FileName {
-                heads: vec![], //TODO: put the current heads
                 name: self.name().clone(),
                 nuri: refe.nuri(),
                 reference: refe,
             };
+            let commit_id = commit.id().unwrap();
             verifier.user_storage.as_ref().unwrap().branch_add_file(
                 commit.id().unwrap(),
                 *branch_id,
                 filename.clone(),
             )?;
+            let repo = verifier.get_repo(repo_id, store.get_store_repo())?;
             verifier
-                .push_app_response(branch_id, AppResponse::V0(AppResponseV0::File(filename)))
+                .push_app_response(
+                    branch_id,
+                    AppResponse::V0(AppResponseV0::Patch(AppPatch {
+                        commit_id,
+                        commit_info: commit.as_info(repo),
+                        graph: None,
+                        discrete: None,
+                        other: Some(OtherPatch::FileAdd(filename)),
+                    })),
+                )
                 .await;
             Ok(())
         } else {

ng-verifier/src/request_processor.rs

@@ -9,6 +9,7 @@
 
 //! Processor for each type of AppRequest
 
+use std::collections::HashMap;
 use std::sync::Arc;
 
 use futures::channel::mpsc;
@@ -20,6 +21,7 @@ use ng_repo::errors::*;
 use ng_repo::file::{RandomAccessFile, ReadFile};
 #[allow(unused_imports)]
 use ng_repo::log::*;
+use ng_repo::repo::CommitInfo;
 use ng_repo::types::BranchId;
 use ng_repo::types::StoreRepo;
 use ng_repo::types::*;
@@ -41,8 +43,11 @@ impl Verifier {
         match command {
             AppRequestCommandV0::Fetch(fetch) => match fetch {
                 AppFetchContentV0::Subscribe => {
-                    let (_, branch_id, _) = self.open_for_target(&nuri.target, false).await?;
+                    let (repo_id, branch_id, store_repo) =
-                    Ok(self.create_branch_subscription(branch_id).await?)
+                        self.open_for_target(&nuri.target, false).await?;
+                    Ok(self
+                        .create_branch_subscription(repo_id, branch_id, store_repo)
+                        .await?)
                 }
                 _ => unimplemented!(),
             },
@@ -221,6 +226,21 @@ impl Verifier {
         })
     }
 
+    fn history_for_nuri(
+        &self,
+        target: &NuriTargetV0,
+    ) -> Result<(Vec<ObjectId>, HashMap<ObjectId, CommitInfo>), VerifierError> {
+        let (repo_id, branch_id, store_repo) = self.resolve_target(target)?; // TODO deal with targets that are commit heads
+        let repo = self.get_repo(&repo_id, &store_repo)?;
+        let branch = repo.branch(&branch_id)?;
+        repo.history_at_heads(&branch.current_heads).map(|history| {
+            (
+                branch.current_heads.iter().map(|h| h.id.clone()).collect(),
+                history,
+            )
+        })
+    }
+
     pub(crate) async fn process(
         &mut self,
         command: &AppRequestCommandV0,
@@ -291,6 +311,18 @@ impl Verifier {
 
                     return Ok(AppResponse::V0(AppResponseV0::Text(vec.join("\n"))));
                 }
+                AppFetchContentV0::History => {
+                    if !nuri.is_valid_for_sparql_update() {
+                        return Err(NgError::InvalidNuri);
+                    }
+
+                    return Ok(match self.history_for_nuri(&nuri.target) {
+                        Err(e) => AppResponse::error(e.to_string()),
+                        Ok((heads, history)) => {
+                            AppResponse::V0(AppResponseV0::History(AppHistory { heads, history }))
+                        }
+                    });
+                }
                 _ => unimplemented!(),
             },
             AppRequestCommandV0::FilePut => match payload {

ng-verifier/src/verifier.rs

@@ -235,12 +235,14 @@ impl Verifier {
 
     pub(crate) async fn create_branch_subscription(
         &mut self,
-        branch: BranchId,
+        repo_id: RepoId,
+        branch_id: BranchId,
+        store_repo: StoreRepo,
     ) -> Result<(Receiver<AppResponse>, CancelFn), VerifierError> {
         //log_info!("#### create_branch_subscription {}", branch);
         let (tx, rx) = mpsc::unbounded::<AppResponse>();
         //log_info!("SUBSCRIBE");
-        if let Some(returned) = self.branch_subscriptions.insert(branch, tx.clone()) {
+        if let Some(returned) = self.branch_subscriptions.insert(branch_id, tx.clone()) {
             //log_info!("RESUBSCRIBE");
             if !returned.is_closed() {
                 //log_info!("FORCE CLOSE");
@@ -249,19 +251,26 @@ impl Verifier {
             }
         }
 
+        let repo = self.get_repo(&repo_id, &store_repo)?;
+        let branch = repo.branch(&branch_id)?;
+
         //let tx = self.branch_subscriptions.entry(branch).or_insert_with(|| {});
-        for file in self
+        let files = self
             .user_storage
             .as_ref()
             .unwrap()
-            .branch_get_all_files(&branch)?
+            .branch_get_all_files(&branch_id)?;
-        {
+        let state = AppState {
-            self.push_app_response(&branch, AppResponse::V0(AppResponseV0::File(file)))
+            heads: branch.current_heads.iter().map(|h| h.id.clone()).collect(),
-                .await;
+            graph: None,
-        }
+            discrete: None,
+            files,
+        };
+        self.push_app_response(&branch_id, AppResponse::V0(AppResponseV0::State(state)))
+            .await;
 
         let fnonce = Box::new(move || {
-            log_info!("CLOSE_CHANNEL of subscription for branch {}", branch);
+            log_info!("CLOSE_CHANNEL of subscription for branch {}", branch_id);
             if !tx.is_closed() {
                 tx.close_channel();
             }