script/evgrd: fill in required LocalEventGraph fields and methods, and present a working test module

script/evgrd/bin/evgrd.rs

@@ -18,7 +18,7 @@
 
 use darkfi::{
     async_daemonize, cli_desc,
-    event_graph::{self, proto::ProtocolEventGraph, EventGraph, EventGraphPtr},
+    event_graph::{proto::ProtocolEventGraph, Event, EventGraph, EventGraphPtr},
     net::{
         session::SESSION_DEFAULT,
         settings::SettingsOpt as NetSettingsOpt,
@@ -29,24 +29,16 @@ use darkfi::{
         jsonrpc::JsonSubscriber,
         server::{listen_and_serve, RequestHandler},
     },
-    system::{sleep, Publisher, PublisherPtr, StoppableTask, StoppableTaskPtr},
-    util::path::{expand_path, get_config_path},
+    system::{sleep, StoppableTask, StoppableTaskPtr},
+    util::path::expand_path,
     Error, Result,
 };
-use darkfi_serial::{
-    async_trait, deserialize_async, serialize_async, AsyncDecodable, AsyncEncodable, Encodable,
-    SerialDecodable, SerialEncodable,
-};
+use darkfi_serial::{AsyncDecodable, AsyncEncodable};
 use futures::FutureExt;
 use log::{debug, error, info};
-use rand::rngs::OsRng;
 use sled_overlay::sled;
 use smol::{fs, lock::Mutex, stream::StreamExt, Executor};
-use std::{
-    collections::HashSet,
-    path::PathBuf,
-    sync::{Arc, Mutex as SyncMutex},
-};
+use std::{collections::HashSet, path::PathBuf, sync::Arc};
 use structopt_toml::{serde::Deserialize, structopt::StructOpt, StructOptToml};
 use url::Url;
 
@@ -102,7 +94,7 @@ struct Args {
     sync_attempts: u8,
 
     /// Number of seconds to wait before trying again if sync fails.
-    #[structopt(long, default_value = "10")]
+    #[structopt(long, default_value = "50")]
     sync_timeout: u8,
 
     /// P2P network settings
@@ -170,14 +162,12 @@ async fn rpc_serve(
             }
         }
     }
-
-    Ok(())
 }
 
 async fn handle_connect(
     mut stream: Box<dyn PtStream>,
     daemon: Arc<Daemon>,
-    ex: Arc<Executor<'_>>,
+    _ex: Arc<Executor<'_>>,
 ) -> Result<()> {
     let client_version = VersionMessage::decode_async(&mut stream).await?;
     info!(target: "evgrd", "Client version: {}", client_version.protocol_version);
@@ -204,6 +194,8 @@ async fn handle_connect(
                 info!(target: "evgrd", "Fetching events {fetchevs:?}");
                 let events = daemon.event_graph.fetch_successors_of(fetchevs.unref_tips).await?;
 
+                info!("fetched {events:?}");
+
                 for event in events {
                    MSG_EVENT.encode_async(&mut stream).await?;
                    event.encode_async(&mut stream).await?;
@@ -234,12 +226,18 @@ async fn realmain(args: Args, ex: Arc<Executor<'static>>) -> Result<()> {
         sled_db.clone(),
         replay_datastore.clone(),
         replay_mode,
-        "darkirc_dag",
+        "evgrd_dag",
         1,
         ex.clone(),
     )
     .await?;
 
+    // Adding some events
+    // for i in 1..6 {
+    //     let event = Event::new(vec![1, 2, 3, i], &event_graph).await;
+    //     event_graph.dag_insert(&[event.clone()]).await.unwrap();
+    // }
+
     let prune_task = event_graph.prune_task.get().unwrap();
 
     info!("Registering EventGraph P2P protocol");

script/evgrd/bin/test.rs

@@ -17,33 +17,27 @@
  */
 
 use darkfi::{
-    async_daemonize, cli_desc,
-    event_graph::{self, proto::ProtocolEventGraph, EventGraph, EventGraphPtr},
-    net::{
-        session::SESSION_DEFAULT,
-        settings::SettingsOpt as NetSettingsOpt,
-        transport::{Dialer, Listener, PtListener, PtStream},
-        P2p, P2pPtr,
-    },
-    rpc::{
-        jsonrpc::JsonSubscriber,
-        server::{listen_and_serve, RequestHandler},
-    },
-    system::{sleep, StoppableTask, StoppableTaskPtr},
-    util::path::{expand_path, get_config_path},
+    event_graph::{self},
+    net::transport::Dialer,
+    util::path::expand_path,
     Error, Result,
 };
-use darkfi_serial::{
-    async_trait, deserialize_async, serialize_async, AsyncDecodable, AsyncEncodable, Encodable,
-    SerialDecodable, SerialEncodable,
-};
-use log::{debug, error, info, warn};
+use darkfi_serial::{AsyncDecodable, AsyncEncodable};
+use log::{error, info};
+use sled_overlay::sled;
+use smol::fs;
 use url::Url;
 
 use evgrd::{FetchEventsMessage, LocalEventGraph, VersionMessage, MSG_EVENT, MSG_FETCHEVENTS};
 
 async fn amain() -> Result<()> {
-    let evgr = LocalEventGraph::new();
+    info!("Instantiating event DAG");
+    let ex = std::sync::Arc::new(smol::Executor::new());
+    let datastore = expand_path("~/.local/darkfi/evgrd")?;
+    fs::create_dir_all(&datastore).await?;
+    let sled_db = sled::open(datastore)?;
+
+    let evgr = LocalEventGraph::new(sled_db.clone(), "evgrd_testdag", 1, ex.clone()).await?;
 
     let endpoint = "tcp://127.0.0.1:5588";
     let endpoint = Url::parse(endpoint)?;
@@ -51,33 +45,44 @@ async fn amain() -> Result<()> {
     let dialer = Dialer::new(endpoint, None).await?;
     let timeout = std::time::Duration::from_secs(60);
 
-    info!("Connecting...");
+    println!("Connecting...");
     let mut stream = dialer.dial(Some(timeout)).await?;
-    info!("Connected!");
+    println!("Connected!");
 
     let version = VersionMessage::new();
     version.encode_async(&mut stream).await?;
 
     let server_version = VersionMessage::decode_async(&mut stream).await?;
-    info!("Server version: {}", server_version.protocol_version);
+    println!("Server version: {}", server_version.protocol_version);
 
-    let fetchevs = FetchEventsMessage::new(evgr.unref_tips.clone());
+    let unref_tips = evgr.unreferenced_tips.read().await.clone();
+    let fetchevs = FetchEventsMessage::new(unref_tips);
     MSG_FETCHEVENTS.encode_async(&mut stream).await?;
     fetchevs.encode_async(&mut stream).await?;
 
     loop {
         let msg_type = u8::decode_async(&mut stream).await?;
+        println!("Received: {msg_type:?}");
         if msg_type != MSG_EVENT {
             error!("Received invalid msg_type: {msg_type}");
             return Err(Error::MalformedPacket)
         }
 
         let ev = event_graph::Event::decode_async(&mut stream).await?;
-    }
 
-    Ok(())
+        let genesis_timestamp = evgr.current_genesis.read().await.clone().timestamp;
+        let ev_id = ev.id();
+        if !evgr.dag.contains_key(ev_id.as_bytes()).unwrap() &&
+            ev.validate(&evgr.dag, genesis_timestamp, evgr.days_rotation, None).await?
+        {
+            println!("got {ev:?}");
+            evgr.dag_insert(&[ev]).await.unwrap();
+        } else {
+            println!("Event is invalid!")
+        }
+    }
 }
 
 fn main() {
-    smol::block_on(amain());
+    let _ = smol::block_on(amain());
 }

script/evgrd/src/lib.rs

@@ -16,21 +16,336 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-use darkfi::event_graph::Event;
+use darkfi::{
+    event_graph::{
+        util::{generate_genesis, next_rotation_timestamp, seconds_until_next_rotation},
+        Event, GENESIS_CONTENTS, INITIAL_GENESIS, NULL_ID, N_EVENT_PARENTS,
+    },
+    system::{sleep, Publisher, PublisherPtr, StoppableTask, StoppableTaskPtr},
+    Error, Result,
+};
 use darkfi_serial::{
-    async_trait, deserialize_async, serialize_async, Encodable, SerialDecodable, SerialEncodable,
+    async_trait, deserialize_async, serialize_async, SerialDecodable, SerialEncodable,
+};
+use log::{debug, error, info};
+use sled_overlay::{sled, SledTreeOverlay};
+use smol::{
+    lock::{OnceCell, RwLock},
+    Executor,
+};
+use std::{
+    collections::{BTreeMap, HashSet},
+    sync::Arc,
 };
-use std::sync::Arc;
 
 pub const PROTOCOL_VERSION: u32 = 1;
 
+/// Atomic pointer to an [`EventGraph`] instance.
+pub type LocalEventGraphPtr = Arc<LocalEventGraph>;
+
 pub struct LocalEventGraph {
-    pub unref_tips: Vec<(u64, blake3::Hash)>,
+    /// Sled tree containing the DAG
+    pub dag: sled::Tree,
+    /// The set of unreferenced DAG tips
+    pub unreferenced_tips: RwLock<BTreeMap<u64, HashSet<blake3::Hash>>>,
+    /// A `HashSet` containg event IDs and their 1-level parents.
+    /// These come from the events we've sent out using `EventPut`.
+    /// They are used with `EventReq` to decide if we should reply
+    /// or not. Additionally it is also used when we broadcast the
+    /// `TipRep` message telling peers about our unreferenced tips.
+    broadcasted_ids: RwLock<HashSet<blake3::Hash>>,
+    /// DAG Pruning Task
+    pub prune_task: OnceCell<StoppableTaskPtr>,
+    /// Event publisher, this notifies whenever an event is
+    /// inserted into the DAG
+    pub event_pub: PublisherPtr<Event>,
+    /// Current genesis event
+    pub current_genesis: RwLock<Event>,
+    /// Currently configured DAG rotation, in days
+    pub days_rotation: u64,
+    /// Flag signalling DAG has finished initial sync
+    pub synced: RwLock<bool>,
+    /// Enable graph debugging
+    pub deg_enabled: RwLock<bool>,
 }
 
 impl LocalEventGraph {
-    pub fn new() -> Self {
-        Self { unref_tips: vec![] }
+    pub async fn new(
+        sled_db: sled::Db,
+        dag_tree_name: &str,
+        days_rotation: u64,
+        ex: Arc<Executor<'_>>,
+    ) -> Result<LocalEventGraphPtr> {
+        let dag = sled_db.open_tree(dag_tree_name)?;
+        let unreferenced_tips = RwLock::new(BTreeMap::new());
+        let broadcasted_ids = RwLock::new(HashSet::new());
+        let event_pub = Publisher::new();
+
+        // Create the current genesis event based on the `days_rotation`
+        let current_genesis = generate_genesis(days_rotation);
+        let self_ = Arc::new(Self {
+            dag: dag.clone(),
+            unreferenced_tips,
+            broadcasted_ids,
+            prune_task: OnceCell::new(),
+            event_pub,
+            current_genesis: RwLock::new(current_genesis.clone()),
+            days_rotation,
+            synced: RwLock::new(false),
+            deg_enabled: RwLock::new(false),
+        });
+
+        // Check if we have it in our DAG.
+        // If not, we can prune the DAG and insert this new genesis event.
+        if !dag.contains_key(current_genesis.id().as_bytes())? {
+            info!(
+                target: "event_graph::new()",
+                "[EVENTGRAPH] DAG does not contain current genesis, pruning existing data",
+            );
+            self_.dag_prune(current_genesis).await?;
+        }
+
+        // Find the unreferenced tips in the current DAG state.
+        *self_.unreferenced_tips.write().await = self_.find_unreferenced_tips().await;
+
+        // Spawn the DAG pruning task
+        if days_rotation > 0 {
+            let prune_task = StoppableTask::new();
+            let _ = self_.prune_task.set(prune_task.clone()).await;
+
+            prune_task.clone().start(
+                self_.clone().dag_prune_task(days_rotation),
+                |_| async move {
+                    info!(target: "event_graph::_handle_stop()", "[EVENTGRAPH] Prune task stopped, flushing sled")
+                },
+                Error::DetachedTaskStopped,
+                ex.clone(),
+            );
+        }
+
+        Ok(self_)
+    }
+
+    async fn dag_prune(&self, genesis_event: Event) -> Result<()> {
+        debug!(target: "event_graph::dag_prune()", "Pruning DAG...");
+
+        // Acquire exclusive locks to unreferenced_tips, broadcasted_ids and
+        // current_genesis while this operation is happening. We do this to
+        // ensure that during the pruning operation, no other operations are
+        // able to access the intermediate state which could lead to producing
+        // the wrong state after pruning.
+        let mut unreferenced_tips = self.unreferenced_tips.write().await;
+        let mut broadcasted_ids = self.broadcasted_ids.write().await;
+        let mut current_genesis = self.current_genesis.write().await;
+
+        // Atomically clear the DAG and write the new genesis event.
+        let mut batch = sled::Batch::default();
+        for key in self.dag.iter().keys() {
+            batch.remove(key.unwrap());
+        }
+        batch.insert(genesis_event.id().as_bytes(), serialize_async(&genesis_event).await);
+
+        debug!(target: "event_graph::dag_prune()", "Applying batch...");
+        if let Err(e) = self.dag.apply_batch(batch) {
+            panic!("Failed pruning DAG, sled apply_batch error: {}", e);
+        }
+
+        // Clear unreferenced tips and bcast ids
+        *unreferenced_tips = BTreeMap::new();
+        unreferenced_tips.insert(0, HashSet::from([genesis_event.id()]));
+        *current_genesis = genesis_event;
+        *broadcasted_ids = HashSet::new();
+        drop(unreferenced_tips);
+        drop(broadcasted_ids);
+        drop(current_genesis);
+
+        debug!(target: "event_graph::dag_prune()", "DAG pruned successfully");
+        Ok(())
+    }
+
+    /// Background task periodically pruning the DAG.
+    async fn dag_prune_task(self: Arc<Self>, days_rotation: u64) -> Result<()> {
+        // The DAG should periodically be pruned. This can be a configurable
+        // parameter. By pruning, we should deterministically replace the
+        // genesis event (can use a deterministic timestamp) and drop everything
+        // in the DAG, leaving just the new genesis event.
+        debug!(target: "event_graph::dag_prune_task()", "Spawned background DAG pruning task");
+
+        loop {
+            // Find the next rotation timestamp:
+            let next_rotation = next_rotation_timestamp(INITIAL_GENESIS, days_rotation);
+
+            // Prepare the new genesis event
+            let current_genesis = Event {
+                timestamp: next_rotation,
+                content: GENESIS_CONTENTS.to_vec(),
+                parents: [NULL_ID; N_EVENT_PARENTS],
+                layer: 0,
+            };
+
+            // Sleep until it's time to rotate.
+            let s = seconds_until_next_rotation(next_rotation);
+
+            debug!(target: "event_graph::dag_prune_task()", "Sleeping {}s until next DAG prune", s);
+            sleep(s).await;
+            debug!(target: "event_graph::dag_prune_task()", "Rotation period reached");
+
+            // Trigger DAG prune
+            self.dag_prune(current_genesis).await?;
+        }
+    }
+
+    /// Find the unreferenced tips in the current DAG state, mapped by their layers.
+    async fn find_unreferenced_tips(&self) -> BTreeMap<u64, HashSet<blake3::Hash>> {
+        // First get all the event IDs
+        let mut tips = HashSet::new();
+        for iter_elem in self.dag.iter() {
+            let (id, _) = iter_elem.unwrap();
+            let id = blake3::Hash::from_bytes((&id as &[u8]).try_into().unwrap());
+            tips.insert(id);
+        }
+
+        // Iterate again to find unreferenced IDs
+        for iter_elem in self.dag.iter() {
+            let (_, event) = iter_elem.unwrap();
+            let event: Event = deserialize_async(&event).await.unwrap();
+            for parent in event.parents.iter() {
+                tips.remove(parent);
+            }
+        }
+
+        // Build the layers map
+        let mut map: BTreeMap<u64, HashSet<blake3::Hash>> = BTreeMap::new();
+        for tip in tips {
+            let event = self.dag_get(&tip).await.unwrap().unwrap();
+            if let Some(layer_tips) = map.get_mut(&event.layer) {
+                layer_tips.insert(tip);
+            } else {
+                let mut layer_tips = HashSet::new();
+                layer_tips.insert(tip);
+                map.insert(event.layer, layer_tips);
+            }
+        }
+
+        map
+    }
+
+    pub async fn dag_insert(&self, events: &[Event]) -> Result<Vec<blake3::Hash>> {
+        // Sanity check
+        if events.is_empty() {
+            return Ok(vec![])
+        }
+
+        // Acquire exclusive locks to `unreferenced_tips and broadcasted_ids`
+        let mut unreferenced_tips = self.unreferenced_tips.write().await;
+        let mut broadcasted_ids = self.broadcasted_ids.write().await;
+
+        // Here we keep the IDs to return
+        let mut ids = Vec::with_capacity(events.len());
+
+        // Create an overlay over the DAG tree
+        let mut overlay = SledTreeOverlay::new(&self.dag);
+
+        // Grab genesis timestamp
+        let genesis_timestamp = self.current_genesis.read().await.timestamp;
+
+        // Iterate over given events to validate them and
+        // write them to the overlay
+        for event in events {
+            let event_id = event.id();
+            debug!(
+                target: "event_graph::dag_insert()",
+                "Inserting event {} into the DAG", event_id,
+            );
+
+            if !event
+                .validate(&self.dag, genesis_timestamp, self.days_rotation, Some(&overlay))
+                .await?
+            {
+                error!(target: "event_graph::dag_insert()", "Event {} is invalid!", event_id);
+                return Err(Error::EventIsInvalid)
+            }
+
+            let event_se = serialize_async(event).await;
+
+            // Add the event to the overlay
+            overlay.insert(event_id.as_bytes(), &event_se)?;
+
+            // Note down the event ID to return
+            ids.push(event_id);
+        }
+
+        // Aggregate changes into a single batch
+        let batch = overlay.aggregate().unwrap();
+
+        // Atomically apply the batch.
+        // Panic if something is corrupted.
+        if let Err(e) = self.dag.apply_batch(batch) {
+            panic!("Failed applying dag_insert batch to sled: {}", e);
+        }
+
+        // Iterate over given events to update references and
+        // send out notifications about them
+        for event in events {
+            let event_id = event.id();
+
+            // Update the unreferenced DAG tips set
+            debug!(
+                target: "event_graph::dag_insert()",
+                "Event {} parents {:#?}", event_id, event.parents,
+            );
+            for parent_id in event.parents.iter() {
+                if parent_id != &NULL_ID {
+                    debug!(
+                        target: "event_graph::dag_insert()",
+                        "Removing {} from unreferenced_tips", parent_id,
+                    );
+
+                    // Iterate over unreferenced tips in previous layers
+                    // and remove the parent
+                    // NOTE: this might be too exhaustive, but the
+                    // assumption is that previous layers unreferenced
+                    // tips will be few.
+                    for (layer, tips) in unreferenced_tips.iter_mut() {
+                        if layer >= &event.layer {
+                            continue
+                        }
+                        tips.remove(parent_id);
+                    }
+                    broadcasted_ids.insert(*parent_id);
+                }
+            }
+            unreferenced_tips.retain(|_, tips| !tips.is_empty());
+            debug!(
+                target: "event_graph::dag_insert()",
+                "Adding {} to unreferenced tips", event_id,
+            );
+
+            if let Some(layer_tips) = unreferenced_tips.get_mut(&event.layer) {
+                layer_tips.insert(event_id);
+            } else {
+                let mut layer_tips = HashSet::new();
+                layer_tips.insert(event_id);
+                unreferenced_tips.insert(event.layer, layer_tips);
+            }
+
+            // Send out notifications about the new event
+            self.event_pub.notify(event.clone()).await;
+        }
+
+        // Drop the exclusive locks
+        drop(unreferenced_tips);
+        drop(broadcasted_ids);
+
+        Ok(ids)
+    }
+
+    /// Fetch an event from the DAG
+    pub async fn dag_get(&self, event_id: &blake3::Hash) -> Result<Option<Event>> {
+        let Some(bytes) = self.dag.get(event_id.as_bytes())? else { return Ok(None) };
+        let event: Event = deserialize_async(&bytes).await?;
+
+        Ok(Some(event))
     }
 }
 
@@ -45,13 +360,19 @@ impl VersionMessage {
     }
 }
 
+impl Default for VersionMessage {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 #[derive(Debug, Clone, SerialEncodable, SerialDecodable)]
 pub struct FetchEventsMessage {
-    pub unref_tips: Vec<(u64, blake3::Hash)>,
+    pub unref_tips: BTreeMap<u64, HashSet<blake3::Hash>>,
 }
 
 impl FetchEventsMessage {
-    pub fn new(unref_tips: Vec<(u64, blake3::Hash)>) -> Self {
+    pub fn new(unref_tips: BTreeMap<u64, HashSet<blake3::Hash>>) -> Self {
         Self { unref_tips }
     }
 }

src/event_graph/event.rs

@@ -34,11 +34,11 @@ pub struct Event {
     /// Timestamp of the event in whole seconds
     pub timestamp: u64,
     /// Content of the event
-    pub(crate) content: Vec<u8>,
+    pub content: Vec<u8>,
     /// Parent nodes in the event DAG
-    pub(crate) parents: [blake3::Hash; N_EVENT_PARENTS],
+    pub parents: [blake3::Hash; N_EVENT_PARENTS],
     /// DAG layer index of the event
-    pub(crate) layer: u64,
+    pub layer: u64,
 }
 
 impl Event {

src/event_graph/mod.rs

@@ -60,7 +60,7 @@ pub mod util;
 use util::{generate_genesis, next_rotation_timestamp};
 
 // Debugging event graph
-pub(crate) mod deg;
+pub mod deg;
 use deg::DegEvent;
 
 #[cfg(test)]
@@ -68,12 +68,12 @@ mod tests;
 
 /// Initial genesis timestamp in millis (07 Sep 2023, 00:00:00 UTC)
 /// Must always be UTC midnight.
-const INITIAL_GENESIS: u64 = 1_694_044_800_000;
+pub const INITIAL_GENESIS: u64 = 1_694_044_800_000;
 /// Genesis event contents
-const GENESIS_CONTENTS: &[u8] = &[0x47, 0x45, 0x4e, 0x45, 0x53, 0x49, 0x53];
+pub const GENESIS_CONTENTS: &[u8] = &[0x47, 0x45, 0x4e, 0x45, 0x53, 0x49, 0x53];
 
 /// The number of parents an event is supposed to have.
-const N_EVENT_PARENTS: usize = 5;
+pub const N_EVENT_PARENTS: usize = 5;
 /// Allowed timestamp drift in milliseconds
 const EVENT_TIME_DRIFT: u64 = 60_000;
 /// Null event ID
@@ -843,10 +843,13 @@ impl EventGraph {
 
     /// Fetch all the events that are on a higher layers than the
     /// provided ones.
-    pub async fn fetch_successors_of(&self, tips: Vec<(u64, blake3::Hash)>) -> Result<Vec<Event>> {
+    pub async fn fetch_successors_of(
+        &self,
+        tips: BTreeMap<u64, HashSet<blake3::Hash>>,
+    ) -> Result<Vec<Event>> {
         debug!(
              target: "event_graph::fetch_successors_of()",
-             "fetching successors of c{tips:?}"
+             "fetching successors of {tips:?}"
         );
 
         let mut graph = HashMap::new();
@@ -859,17 +862,22 @@ impl EventGraph {
 
         let mut result = vec![];
 
-        for tip in tips.iter() {
-            if !graph.contains_key(&tip.1) {
-                continue;
+        'outer: for tip in tips.iter() {
+            for i in tip.1.iter() {
+                if !graph.contains_key(i) {
+                    continue 'outer;
+                }
             }
+
             for (_, ev) in graph.iter() {
-                if ev.layer > tip.0 && !result.contains(ev) {
+                if ev.layer > *tip.0 && !result.contains(ev) {
                     result.push(ev.clone())
                 }
             }
         }
 
+        result.sort_by(|a, b| a.layer.cmp(&b.layer));
+
         Ok(result)
     }
 

src/event_graph/util.rs

@@ -69,7 +69,7 @@ pub(super) fn days_since(midnight_ts: u64) -> u64 {
 }
 
 /// Calculate the timestamp of the next DAG rotation.
-pub(super) fn next_rotation_timestamp(starting_timestamp: u64, rotation_period: u64) -> u64 {
+pub fn next_rotation_timestamp(starting_timestamp: u64, rotation_period: u64) -> u64 {
     // Prevent division by 0
     if rotation_period == 0 {
         panic!("Rotation period cannot be 0");
@@ -99,7 +99,7 @@ pub(super) fn next_rotation_timestamp(starting_timestamp: u64, rotation_period:
 /// Calculate the time in milliseconds until the next_rotation, given
 /// as a timestamp.
 /// `next_rotation` here represents a timestamp in UNIX epoch format.
-pub(super) fn seconds_until_next_rotation(next_rotation: u64) -> u64 {
+pub fn seconds_until_next_rotation(next_rotation: u64) -> u64 {
     // Store `now` in a variable in order to avoid a TOCTOU error.
     // There may be a drift of one second between this panic check and
     // the return value if we get unlucky.
@@ -111,7 +111,7 @@ pub(super) fn seconds_until_next_rotation(next_rotation: u64) -> u64 {
 }
 
 /// Generate a deterministic genesis event corresponding to the DAG's configuration.
-pub(super) fn generate_genesis(days_rotation: u64) -> Event {
+pub fn generate_genesis(days_rotation: u64) -> Event {
     // Days rotation is u64 except zero
     let timestamp = if days_rotation == 0 {
         INITIAL_GENESIS