Snap sync without lite state sync

Author: nazar-pc

crates/subspace-malicious-operator/src/bin/subspace-malicious-operator.rs

@@ -215,6 +215,7 @@ fn main() -> Result<(), Error> {
 
             let partial_components = subspace_service::new_partial::<PosTable, RuntimeApi>(
                 &consensus_chain_config,
+                false,
                 &pot_external_entropy,
             )
             .map_err(|error| {

crates/subspace-node/src/commands/run.rs

@@ -17,7 +17,6 @@ use domain_runtime_primitives::opaque::Block as DomainBlock;
 use futures::FutureExt;
 use sc_cli::Signals;
 use sc_consensus_slots::SlotProportion;
-use sc_network::config::SyncMode;
 use sc_service::{BlocksPruning, PruningMode};
 use sc_storage_monitor::StorageMonitorService;
 use sc_transaction_pool_api::OffchainTransactionPoolFactory;
@@ -149,6 +148,10 @@ pub async fn run(run_options: RunOptions) -> Result<(), Error> {
 
             let partial_components = match subspace_service::new_partial::<PosTable, RuntimeApi>(
                 &subspace_configuration,
+                match subspace_configuration.sync {
+                    ChainSyncMode::Full => false,
+                    ChainSyncMode::Snap => true,
+                },
                 &pot_external_entropy,
             ) {
                 Ok(partial_components) => partial_components,
@@ -164,15 +167,9 @@ pub async fn run(run_options: RunOptions) -> Result<(), Error> {
                     consensus_state_pruning = PruningMode::ArchiveCanonical;
                     subspace_configuration.base.state_pruning = Some(PruningMode::ArchiveCanonical);
 
-                    // TODO: revisit SyncMode change after https://github.com/paritytech/polkadot-sdk/issues/4407
-                    if subspace_configuration.base.network.sync_mode.light_state() {
-                        // In case of archival pruning mode sync mode needs to be set to full or
-                        // else Substrate network will fail to initialize
-                        subspace_configuration.base.network.sync_mode = SyncMode::Full;
-                    }
-
                     subspace_service::new_partial::<PosTable, RuntimeApi>(
                         &subspace_configuration,
+                        false,
                         &pot_external_entropy,
                     )
                     .map_err(|error| {

crates/subspace-node/src/main.rs

@@ -148,6 +148,7 @@ fn main() -> Result<(), Error> {
                     ..
                 } = subspace_service::new_partial::<PosTable, RuntimeApi>(
                     &config,
+                    false,
                     &derive_pot_external_entropy(&config, None)?,
                 )?;
                 Ok((
@@ -166,6 +167,7 @@ fn main() -> Result<(), Error> {
                     ..
                 } = subspace_service::new_partial::<PosTable, RuntimeApi>(
                     &config,
+                    false,
                     &derive_pot_external_entropy(&config, None)?,
                 )?;
                 Ok((
@@ -185,6 +187,7 @@ fn main() -> Result<(), Error> {
                     ..
                 } = subspace_service::new_partial::<PosTable, RuntimeApi>(
                     &config,
+                    false,
                     &derive_pot_external_entropy(&config, None)?,
                 )?;
                 Ok((
@@ -205,6 +208,7 @@ fn main() -> Result<(), Error> {
                     ..
                 } = subspace_service::new_partial::<PosTable, RuntimeApi>(
                     &config,
+                    false,
                     &derive_pot_external_entropy(&config, None)?,
                 )?;
                 Ok((
@@ -227,6 +231,7 @@ fn main() -> Result<(), Error> {
                     ..
                 } = subspace_service::new_partial::<PosTable, RuntimeApi>(
                     &config,
+                    false,
                     &derive_pot_external_entropy(&config, None)?,
                 )?;
                 Ok((
@@ -263,6 +268,7 @@ fn main() -> Result<(), Error> {
                         let PartialComponents { client, .. } =
                             subspace_service::new_partial::<PosTable, RuntimeApi>(
                                 &config,
+                                false,
                                 &derive_pot_external_entropy(&config, None)?,
                             )?;
 
@@ -279,6 +285,7 @@ fn main() -> Result<(), Error> {
                             client, backend, ..
                         } = subspace_service::new_partial::<PosTable, RuntimeApi>(
                             &config,
+                            false,
                             &derive_pot_external_entropy(&config, None)?,
                         )?;
                         let db = backend.expose_db();

crates/subspace-service/src/config.rs

@@ -154,14 +154,7 @@ impl From<SubstrateConfiguration> for Configuration {
                 max_parallel_downloads: 5,
                 // Substrate's default
                 max_blocks_per_request: 64,
-                sync_mode: match configuration.network.sync_mode {
-                    ChainSyncMode::Full => SyncMode::Full,
-                    // TODO: revisit SyncMode change after https://github.com/paritytech/polkadot-sdk/issues/4407
-                    ChainSyncMode::Snap => SyncMode::LightState {
-                        skip_proofs: false,
-                        storage_chain_mode: false,
-                    },
-                },
+                sync_mode: SyncMode::Full,
                 pause_sync: Arc::new(AtomicBool::new(false)),
                 // Substrate's default
                 enable_dht_random_walk: true,

crates/subspace-service/src/lib.rs

@@ -460,11 +460,12 @@ type PartialComponents<RuntimeApi> = sc_service::PartialComponents<
 >;
 
 /// Creates `PartialComponents` for Subspace client.
-#[allow(clippy::type_complexity)]
 pub fn new_partial<PosTable, RuntimeApi>(
     // TODO: Stop using `Configuration` once
     //  https://github.com/paritytech/polkadot-sdk/pull/5364 is in our fork
     config: &Configuration,
+    // TODO: Replace with check for `ChainSyncMode` once we get rid of ^ `Configuration`
+    snap_sync: bool,
     pot_external_entropy: &[u8],
 ) -> Result<PartialComponents<RuntimeApi>, ServiceError>
 where
@@ -502,7 +503,7 @@ where
 
     let genesis_block_builder = GenesisBlockBuilder::new(
         config.chain_spec.as_storage_builder(),
-        !config.no_genesis(),
+        !snap_sync,
         backend.clone(),
         executor.clone(),
     )?;

crates/subspace-service/src/sync_from_dsn/snap_sync.rs

@@ -10,9 +10,7 @@ use sc_consensus::{
 };
 use sc_consensus_subspace::archiver::{decode_block, SegmentHeadersStore};
 use sc_network::{NetworkRequest, PeerId};
-use sc_network_sync::service::syncing_service::SyncRestartArgs;
 use sc_network_sync::SyncingService;
-use sc_service::config::SyncMode;
 use sc_service::{ClientExt, Error};
 use sp_api::ProvideRuntimeApi;
 use sp_blockchain::HeaderBackend;
@@ -90,15 +88,6 @@ pub(crate) async fn snap_sync<Backend, Block, AS, Client, PG, NR>(
     } else {
         debug!("Snap sync can only work with genesis state, skipping");
     }
-
-    // Switch back to full sync mode
-    let info = client.info();
-    sync_service
-        .restart(SyncRestartArgs {
-            sync_mode: SyncMode::Full,
-            new_best_block: Some(info.best_number),
-        })
-        .await;
 }
 
 // Get blocks from the last segment or from the segment containing the target block.