Create a task to prune EpochSettings and add it to the UpkeepService.

mithril-aggregator/src/database/repository/epoch_settings_store.rs

@@ -12,6 +12,7 @@ use crate::database::query::{
     DeleteEpochSettingsQuery, GetEpochSettingsQuery, UpdateEpochSettingsQuery,
 };
 use crate::entities::AggregatorEpochSettings;
+use crate::services::EpochPruningTask;
 use crate::EpochSettingsStorer;
 
 /// Service to deal with epoch settings (read & write).
@@ -68,17 +69,6 @@ impl EpochSettingsStorer for EpochSettingsStore {
             .map_err(|e| AdapterError::GeneralError(e.context("persist epoch settings failure")))?
             .unwrap_or_else(|| panic!("No entity returned by the persister, epoch = {epoch:?}"));
 
-        // Prune useless old epoch settings.
-        if let Some(threshold) = self.retention_limit {
-            let _ = self
-                .connection
-                .fetch(DeleteEpochSettingsQuery::below_epoch_threshold(
-                    epoch - threshold,
-                ))
-                .map_err(AdapterError::QueryError)?
-                .count();
-        }
-
         Ok(Some(epoch_settings_record.into()))
     }
 
@@ -102,6 +92,25 @@ impl EpochSettingsStorer for EpochSettingsStore {
     }
 }
 
+#[async_trait]
+impl EpochPruningTask for EpochSettingsStore {
+    fn pruned_data(&self) -> &'static str {
+        "Epoch settings"
+    }
+
+    /// Prune useless old epoch settings.
+    async fn prune(&self, epoch: Epoch) -> StdResult<()> {
+        if let Some(threshold) = self.retention_limit {
+            self.connection
+                .apply(DeleteEpochSettingsQuery::below_epoch_threshold(
+                    epoch - threshold,
+                ))
+                .map_err(AdapterError::QueryError)?;
+        }
+        Ok(())
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use mithril_common::entities::BlockNumber;
@@ -172,7 +181,7 @@ mod tests {
     }
 
     #[tokio::test]
-    async fn save_epoch_settings_prune_older_epoch_settings() {
+    async fn prune_epoch_settings_older_than_threshold() {
         const EPOCH_SETTINGS_PRUNE_EPOCH_THRESHOLD: u64 = 5;
 
         let connection = main_db_connection().unwrap();
@@ -183,12 +192,10 @@ mod tests {
         );
 
         store
-            .save_epoch_settings(
-                Epoch(2) + EPOCH_SETTINGS_PRUNE_EPOCH_THRESHOLD,
-                AggregatorEpochSettings::dummy(),
-            )
+            .prune(Epoch(2) + EPOCH_SETTINGS_PRUNE_EPOCH_THRESHOLD)
             .await
-            .expect("saving epoch settings should not fails");
+            .unwrap();
+
         let epoch1_params = store.get_epoch_settings(Epoch(1)).await.unwrap();
         let epoch2_params = store.get_epoch_settings(Epoch(2)).await.unwrap();
 
@@ -202,6 +209,27 @@ mod tests {
         );
     }
 
+    #[tokio::test]
+    async fn without_threshold_nothing_is_pruned() {
+        let connection = main_db_connection().unwrap();
+        insert_epoch_settings(&connection, &[1, 2]).unwrap();
+        let store = EpochSettingsStore::new(Arc::new(connection), None);
+
+        store.prune(Epoch(100)).await.unwrap();
+
+        let epoch1_params = store.get_epoch_settings(Epoch(1)).await.unwrap();
+        let epoch2_params = store.get_epoch_settings(Epoch(2)).await.unwrap();
+
+        assert!(
+            epoch1_params.is_some(),
+            "Epoch settings at epoch 1 should have been pruned",
+        );
+        assert!(
+            epoch2_params.is_some(),
+            "Epoch settings at epoch 2 should still exist",
+        );
+    }
+
     #[tokio::test]
     async fn save_epoch_settings_stores_in_database() {
         let connection = main_db_connection().unwrap();

mithril-aggregator/src/dependency_injection/builder.rs

@@ -133,8 +133,8 @@ pub struct DependenciesBuilder {
     /// Verification key store.
     pub verification_key_store: Option<Arc<dyn VerificationKeyStorer>>,
 
-    /// Epoch settings storer.
-    pub epoch_settings_storer: Option<Arc<dyn EpochSettingsStorer>>,
+    /// Epoch settings store.
+    pub epoch_settings_store: Option<Arc<EpochSettingsStore>>,
 
     /// Cardano CLI Runner for the [ChainObserver]
     pub cardano_cli_runner: Option<Box<CardanoCliRunner>>,
@@ -261,7 +261,7 @@ impl DependenciesBuilder {
             certificate_repository: None,
             open_message_repository: None,
             verification_key_store: None,
-            epoch_settings_storer: None,
+            epoch_settings_store: None,
             cardano_cli_runner: None,
             chain_observer: None,
             chain_block_reader: None,
@@ -587,7 +587,7 @@ impl DependenciesBuilder {
         Ok(self.verification_key_store.as_ref().cloned().unwrap())
     }
 
-    async fn build_epoch_settings_storer(&mut self) -> Result<Arc<dyn EpochSettingsStorer>> {
+    async fn build_epoch_settings_store(&mut self) -> Result<Arc<EpochSettingsStore>> {
         let logger = self.root_logger();
         let epoch_settings_store = EpochSettingsStore::new(
             self.get_sqlite_connection().await?,
@@ -638,12 +638,12 @@ impl DependenciesBuilder {
     }
 
     /// Get a configured [EpochSettingsStorer].
-    pub async fn get_epoch_settings_storer(&mut self) -> Result<Arc<dyn EpochSettingsStorer>> {
-        if self.epoch_settings_storer.is_none() {
-            self.epoch_settings_storer = Some(self.build_epoch_settings_storer().await?);
+    pub async fn get_epoch_settings_store(&mut self) -> Result<Arc<EpochSettingsStore>> {
+        if self.epoch_settings_store.is_none() {
+            self.epoch_settings_store = Some(self.build_epoch_settings_store().await?);
         }
 
-        Ok(self.epoch_settings_storer.as_ref().cloned().unwrap())
+        Ok(self.epoch_settings_store.as_ref().cloned().unwrap())
     }
 
     async fn build_chain_observer(&mut self) -> Result<Arc<dyn ChainObserver>> {
@@ -1255,7 +1255,7 @@ impl DependenciesBuilder {
 
     async fn build_epoch_service(&mut self) -> Result<EpochServiceWrapper> {
         let verification_key_store = self.get_verification_key_store().await?;
-        let epoch_settings_storer = self.get_epoch_settings_storer().await?;
+        let epoch_settings_storer = self.get_epoch_settings_store().await?;
         let epoch_settings = self.get_epoch_settings_configuration()?;
         let network = self.configuration.get_network()?;
         let allowed_discriminants = self.get_allowed_signed_entity_types_discriminants()?;
@@ -1330,14 +1330,15 @@ impl DependenciesBuilder {
 
     async fn build_upkeep_service(&mut self) -> Result<Arc<dyn UpkeepService>> {
         let stake_pool_pruning_task = self.get_stake_store().await?;
+        let epoch_settings_pruning_task = self.get_epoch_settings_store().await?;
 
         let upkeep_service = Arc::new(AggregatorUpkeepService::new(
             self.get_sqlite_connection().await?,
             self.get_sqlite_connection_cardano_transaction_pool()
                 .await?,
             self.get_event_store_sqlite_connection().await?,
             self.get_signed_entity_lock().await?,
-            vec![stake_pool_pruning_task],
+            vec![stake_pool_pruning_task, epoch_settings_pruning_task],
             self.root_logger(),
         ));
 
@@ -1428,7 +1429,7 @@ impl DependenciesBuilder {
             certificate_repository: self.get_certificate_repository().await?,
             open_message_repository: self.get_open_message_repository().await?,
             verification_key_store: self.get_verification_key_store().await?,
-            epoch_settings_storer: self.get_epoch_settings_storer().await?,
+            epoch_settings_storer: self.get_epoch_settings_store().await?,
             chain_observer: self.get_chain_observer().await?,
             immutable_file_observer: self.get_immutable_file_observer().await?,
             digester: self.get_immutable_digester().await?,
@@ -1555,7 +1556,7 @@ impl DependenciesBuilder {
             certificate_repository: self.get_certificate_repository().await?,
             certificate_verifier: self.get_certificate_verifier().await?,
             genesis_verifier: self.get_genesis_verifier().await?,
-            epoch_settings_storer: self.get_epoch_settings_storer().await?,
+            epoch_settings_storer: self.get_epoch_settings_store().await?,
             verification_key_store: self.get_verification_key_store().await?,
         };
 

mithril-aggregator/src/store/epoch_settings_storer.rs

@@ -6,11 +6,11 @@ use tokio::sync::RwLock;
 
 use mithril_common::entities::{Epoch, ProtocolParameters};
 
-use crate::entities::AggregatorEpochSettings;
+use crate::{entities::AggregatorEpochSettings, services::EpochPruningTask};
 
 /// Store and get [aggregator epoch settings][AggregatorEpochSettings] for given epoch.
 #[async_trait]
-pub trait EpochSettingsStorer: Sync + Send {
+pub trait EpochSettingsStorer: EpochPruningTask + Sync + Send {
     /// Save the given `AggregatorEpochSettings` for the given [Epoch].
     async fn save_epoch_settings(
         &self,
@@ -83,6 +83,17 @@ impl EpochSettingsStorer for FakeEpochSettingsStorer {
     }
 }
 
+#[async_trait]
+impl EpochPruningTask for FakeEpochSettingsStorer {
+    fn pruned_data(&self) -> &'static str {
+        "Fake epoch settings"
+    }
+
+    async fn prune(&self, _epoch: Epoch) -> StdResult<()> {
+        Ok(())
+    }
+}
+
 #[cfg(test)]
 mod tests {