feat: periodic snapshooting

node_core/src/chain_storage/block_store.rs

@@ -2,6 +2,7 @@ use std::path::Path;
 
 use anyhow::{anyhow, Result};
 use common::block::Block;
+use log::warn;
 use storage::sc_db_utils::{DataBlob, DataBlobChangeVariant};
 use storage::RocksDBIO;
 
@@ -56,6 +57,35 @@ impl NodeBlockStore {
     pub fn get_sc_sc_state(&self, sc_addr: &str) -> Result<Vec<DataBlob>> {
         Ok(self.dbio.get_sc_sc_state(sc_addr)?)
     }
+
+    pub fn put_snapshot_at_block_id(
+        &self,
+        id: u64,
+        accounts_ser: Vec<u8>,
+        comm_ser: Vec<u8>,
+        txs_ser: Vec<u8>,
+        nullifiers_ser: Vec<u8>,
+    ) -> Result<()> {
+        self.dbio
+            .put_snapshot_block_id_db(id)
+            .inspect_err(|err| warn!("Failed to store snapshot block id with error {err:#?}"))?;
+        self.dbio
+            .put_snapshot_account_db(accounts_ser)
+            .inspect_err(|err| warn!("Failed to store snapshot accounts with error {err:#?}"))?;
+        self.dbio
+            .put_snapshot_commitement_db(comm_ser)
+            .inspect_err(|err| warn!("Failed to store snapshot commitments with error {err:#?}"))?;
+        self.dbio
+            .put_snapshot_transaction_db(txs_ser)
+            .inspect_err(|err| {
+                warn!("Failed to store snapshot transactions with error {err:#?}")
+            })?;
+        self.dbio
+            .put_snapshot_account_db(nullifiers_ser)
+            .inspect_err(|err| warn!("Failed to store snapshot nullifiers with error {err:#?}"))?;
+
+        Ok(())
+    }
 }
 
 #[cfg(test)]

node_core/src/chain_storage/mod.rs

@@ -13,10 +13,11 @@ use common::{
     utxo_commitment::UTXOCommitment,
 };
 use k256::AffinePoint;
+use log::{info, warn};
 use public_context::PublicSCContext;
 use utxo::utxo_core::UTXO;
 
-use crate::ActionData;
+use crate::{config::NodeConfig, ActionData};
 
 pub mod accounts_store;
 pub mod block_store;
@@ -28,10 +29,11 @@ pub struct NodeChainStore {
     pub nullifier_store: HashSet<UTXONullifier>,
     pub utxo_commitments_store: UTXOCommitmentsMerkleTree,
     pub pub_tx_store: PublicTransactionMerkleTree,
+    pub node_config: NodeConfig,
 }
 
 impl NodeChainStore {
-    pub fn new_with_genesis(home_dir: &Path, genesis_block: Block) -> Self {
+    pub fn new_with_genesis(config: NodeConfig, genesis_block: Block) -> Self {
         let acc_map = HashMap::new();
         let nullifier_store = HashSet::new();
         let utxo_commitments_store = UTXOCommitmentsMerkleTree::new(vec![]);
@@ -40,7 +42,7 @@ impl NodeChainStore {
         //Sequencer should panic if unable to open db,
         //as fixing this issue may require actions non-native to program scope
         let block_store =
-            NodeBlockStore::open_db_with_genesis(&home_dir.join("rocksdb"), Some(genesis_block))
+            NodeBlockStore::open_db_with_genesis(&config.home.join("rocksdb"), Some(genesis_block))
                 .unwrap();
 
         Self {
@@ -49,10 +51,13 @@ impl NodeChainStore {
             nullifier_store,
             utxo_commitments_store,
             pub_tx_store,
+            node_config: config,
         }
     }
 
     pub fn dissect_insert_block(&mut self, block: Block) -> Result<()> {
+        let block_id = block.block_id;
+
         for tx in &block.transactions {
             if !tx.execution_input.is_empty() {
                 let public_action = serde_json::from_slice::<ActionData>(&tx.execution_input);
@@ -136,6 +141,55 @@ impl NodeChainStore {
 
         self.block_store.put_block_at_id(block)?;
 
+        //Snapshot
+        if block_id % self.node_config.shapshot_frequency_in_blocks == 0 {
+            //Serializing all important data structures
+
+            //If we fail snapshot, it is not the reason to stop running
+            //Logging on warn level in this cases
+
+            let accounts_ser = serde_json::to_vec(&self.acc_map).inspect_err(|err| {
+                warn!("Failed to serialize accounts data {err:#?}");
+            });
+
+            let comm_tree_serialized = serde_json::to_vec(&self.utxo_commitments_store)
+                .inspect_err(|err| {
+                    warn!("Failed to serialize commitments {err:#?}");
+                });
+
+            let tx_tree_serialized = serde_json::to_vec(&self.pub_tx_store).inspect_err(|err| {
+                warn!("Failed to serialize transactions {err:#?}");
+            });
+
+            let nullifiers_serialized =
+                serde_json::to_vec(&self.nullifier_store).inspect_err(|err| {
+                    warn!("Failed to serialize nullifiers {err:#?}");
+                });
+
+            match (
+                accounts_ser,
+                comm_tree_serialized,
+                tx_tree_serialized,
+                nullifiers_serialized,
+            ) {
+                (Ok(accounts_ser), Ok(comm_ser), Ok(txs_ser), Ok(nullifiers_ser)) => {
+                    let snapshot_trace = self.block_store.put_snapshot_at_block_id(
+                        block_id,
+                        accounts_ser,
+                        comm_ser,
+                        txs_ser,
+                        nullifiers_ser,
+                    );
+
+                    info!(
+                        "Snapshot executed at {:?} with results {snapshot_trace:#?}",
+                        block_id
+                    );
+                }
+                _ => warn!("Failed to serialize node data for snapshot"),
+            }
+        }
+
         Ok(())
     }
 

node_core/src/config.rs

@@ -49,4 +49,6 @@ pub struct NodeConfig {
     pub port: u16,
     ///Gas config
     pub gas_config: GasConfig,
+    ///Frequency of snapshots
+    pub shapshot_frequency_in_blocks: u64,
 }

node_core/src/lib.rs

@@ -94,11 +94,11 @@ impl NodeCore {
         let client = Arc::new(SequencerClient::new(config.clone())?);
 
         let genesis_id = client.get_genesis_id().await?;
-        info!("Gesesis id is {genesis_id:?}");
+        info!("Genesis id is {genesis_id:?}");
 
         let genesis_block = client.get_block(genesis_id.genesis_id).await?.block;
 
-        let mut storage = NodeChainStore::new_with_genesis(&config.home, genesis_block);
+        let mut storage = NodeChainStore::new_with_genesis(config.clone(), genesis_block);
 
         pre_start::setup_empty_sc_states(&storage).await?;