refactor: Make flow control syncing default and drop the no flow parts #211
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WalkthroughThis pull request removes the flow-control and gap-restart subsystems from filter synchronization. Deleted FilterSyncCoordinator struct, gaps module, and flow-control configuration fields from ClientConfig. Unified multiple branching paths into simplified filter-sync flows and removed associated stats tracking methods. Changes
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🧹 Nitpick comments (2)
dash-spv/src/client/message_handler.rs (1)
397-416: Avoid doubleshould_fetch_transactioncall in inventory handling
filter.should_fetch_transaction(&txid).awaitis evaluated twice (once in theifcondition and once in the debug log). That’s unnecessary work for an async check and could diverge if the predicate has side effects or internal state.You can compute it once and reuse it:
- if let Some(filter) = self.mempool_filter { - if self.config.fetch_mempool_transactions - && filter.should_fetch_transaction(&txid).await - { + if let Some(filter) = self.mempool_filter { + let should_fetch = filter.should_fetch_transaction(&txid).await; + if self.config.fetch_mempool_transactions && should_fetch { tracing::info!("📥 Requesting transaction {}", txid); // Request the transaction let getdata = NetworkMessage::GetData(vec![item]); if let Err(e) = self.network.send_message(getdata).await { tracing::error!("Failed to request transaction {}: {}", txid, e); } } else { - tracing::debug!("Not fetching transaction {} (fetch_mempool_transactions={}, should_fetch={})", - txid, - self.config.fetch_mempool_transactions, - filter.should_fetch_transaction(&txid).await - ); + tracing::debug!( + "Not fetching transaction {} (fetch_mempool_transactions={}, should_fetch={})", + txid, + self.config.fetch_mempool_transactions, + should_fetch + ); }dash-spv/src/sync/filters/stats.rs (1)
20-26:try_lock()may return misleading count of 0 when lock is contended.Using
try_lock()instead of.awaiton the mutex means this will return0if another task holds the lock, which could be misleading for callers expecting the actual count. Consider whether this silent fallback is acceptable for the use cases of this method, or if anasyncversion with proper await would be more appropriate.If this is intentional for non-blocking diagnostics/stats purposes, consider adding a doc comment explaining the behavior.
+ /// Get the total number of filters received. + /// + /// Note: Returns 0 if the internal lock is contended. This is a non-blocking + /// operation intended for diagnostics where an approximate count is acceptable. pub fn get_received_filter_count(&self) -> u32 { match self.received_filter_heights.try_lock() { Ok(heights) => heights.len() as u32, Err(_) => 0, } }
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📒 Files selected for processing (21)
dash-spv/src/client/config.rs(0 hunks)dash-spv/src/client/config_test.rs(0 hunks)dash-spv/src/client/filter_sync.rs(0 hunks)dash-spv/src/client/message_handler.rs(1 hunks)dash-spv/src/client/mod.rs(0 hunks)dash-spv/src/client/sync_coordinator.rs(0 hunks)dash-spv/src/network/tests.rs(0 hunks)dash-spv/src/sync/filters/download.rs(3 hunks)dash-spv/src/sync/filters/gaps.rs(0 hunks)dash-spv/src/sync/filters/headers.rs(9 hunks)dash-spv/src/sync/filters/manager.rs(3 hunks)dash-spv/src/sync/filters/matching.rs(0 hunks)dash-spv/src/sync/filters/mod.rs(0 hunks)dash-spv/src/sync/filters/requests.rs(1 hunks)dash-spv/src/sync/filters/retry.rs(1 hunks)dash-spv/src/sync/filters/stats.rs(1 hunks)dash-spv/src/sync/sequential/message_handlers.rs(2 hunks)dash-spv/src/sync/sequential/phase_execution.rs(4 hunks)dash-spv/tests/cfheader_gap_test.rs(0 hunks)dash-spv/tests/edge_case_filter_sync_test.rs(0 hunks)dash-spv/tests/simple_gap_test.rs(0 hunks)
💤 Files with no reviewable changes (12)
- dash-spv/src/client/mod.rs
- dash-spv/src/sync/filters/mod.rs
- dash-spv/src/sync/filters/gaps.rs
- dash-spv/tests/edge_case_filter_sync_test.rs
- dash-spv/src/client/filter_sync.rs
- dash-spv/tests/cfheader_gap_test.rs
- dash-spv/tests/simple_gap_test.rs
- dash-spv/src/network/tests.rs
- dash-spv/src/client/sync_coordinator.rs
- dash-spv/src/client/config_test.rs
- dash-spv/src/client/config.rs
- dash-spv/src/sync/filters/matching.rs
🧰 Additional context used
📓 Path-based instructions (3)
**/*.rs
📄 CodeRabbit inference engine (CLAUDE.md)
**/*.rs: Never hardcode network parameters, addresses, or keys in Rust code
Use proper error types with thiserror crate and propagate errors appropriately in Rust code
Use tokio runtime for async operations in Rust code
Use conditional compilation with feature flags for optional features
Write unit tests for new functionality in Rust
Format Rust code with cargo fmt before committing
Ensure clippy passes with all warnings as errors on all Rust code
**/*.rs: Each crate keeps sources insrc/; unit tests live alongside code with#[cfg(test)]
Maintain MSRV of 1.89 for Rust code
Format Rust code withrustfmt(seerustfmt.toml); runcargo fmt --allbefore commits
Lint Rust code withclippy; avoidunwrap()/expect()in library code; use error types (e.g.,thiserror)
Usesnake_casefor function and variable names in Rust
UseUpperCamelCasefor types and traits in Rust
UseSCREAMING_SNAKE_CASEfor constants in Rust
Follow mixed editions (2021/2024) and crate-specific idioms; prefer async viatokiowhere applicable
Unit tests should be placed near code with descriptive names (e.g.,test_parse_address_mainnet)
Use#[ignore]for network-dependent or long-running tests; run with-- --ignoredflag
Never commit secrets or real keys; avoid logging sensitive data in Rust code
Keep test vectors deterministic in Rust test code
Files:
dash-spv/src/client/message_handler.rsdash-spv/src/sync/sequential/phase_execution.rsdash-spv/src/sync/sequential/message_handlers.rsdash-spv/src/sync/filters/requests.rsdash-spv/src/sync/filters/retry.rsdash-spv/src/sync/filters/stats.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/headers.rsdash-spv/src/sync/filters/manager.rs
dash-spv/src/**/*.rs
📄 CodeRabbit inference engine (dash-spv/CLAUDE.md)
dash-spv/src/**/*.rs: Use trait-based abstractions for swappable implementations (e.g.,NetworkManager,StorageManager)
Use async/await throughout the codebase with tokio runtime
Use domain-specific error types (NetworkError,StorageError,SyncError,ValidationError,SpvError) for error handling
Use trait objects (Arc<dyn StorageManager>,Arc<dyn NetworkManager>) for runtime polymorphism
Use Tokio channels for inter-component message passing
Add comprehensive unit tests in-module for individual components
Files:
dash-spv/src/client/message_handler.rsdash-spv/src/sync/sequential/phase_execution.rsdash-spv/src/sync/sequential/message_handlers.rsdash-spv/src/sync/filters/requests.rsdash-spv/src/sync/filters/retry.rsdash-spv/src/sync/filters/stats.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/headers.rsdash-spv/src/sync/filters/manager.rs
dash-spv/src/sync/**/*.rs
📄 CodeRabbit inference engine (dash-spv/CLAUDE.md)
dash-spv/src/sync/**/*.rs: Use sequential phase-based synchronization withSequentialSyncManagerfor organized sync phases
Use state machines withSyncStateenum to drive synchronization flow and state transitions
Files:
dash-spv/src/sync/sequential/phase_execution.rsdash-spv/src/sync/sequential/message_handlers.rsdash-spv/src/sync/filters/requests.rsdash-spv/src/sync/filters/retry.rsdash-spv/src/sync/filters/stats.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/headers.rsdash-spv/src/sync/filters/manager.rs
🧠 Learnings (19)
📓 Common learnings
Learnt from: DCG-Claude
Repo: dashpay/rust-dashcore PR: 0
File: :0-0
Timestamp: 2025-06-26T16:01:37.609Z
Learning: The mempool tracking infrastructure (UnconfirmedTransaction, MempoolState, configuration, and mempool_filter.rs) is fully implemented and integrated in the Dash SPV client as of this PR, including client logic, FFI APIs, and tests.
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:00:17.310Z
Learning: Applies to dash-spv/src/sync/**/*.rs : Use sequential phase-based synchronization with `SequentialSyncManager` for organized sync phases
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:00:17.311Z
Learning: Applies to dash-spv/src/sync/**/*.rs : Use state machines with `SyncState` enum to drive synchronization flow and state transitions
📚 Learning: 2025-06-26T16:01:37.609Z
Learnt from: DCG-Claude
Repo: dashpay/rust-dashcore PR: 0
File: :0-0
Timestamp: 2025-06-26T16:01:37.609Z
Learning: The mempool tracking infrastructure (UnconfirmedTransaction, MempoolState, configuration, and mempool_filter.rs) is fully implemented and integrated in the Dash SPV client as of this PR, including client logic, FFI APIs, and tests.
Applied to files:
dash-spv/src/client/message_handler.rsdash-spv/src/sync/sequential/message_handlers.rsdash-spv/src/sync/filters/requests.rsdash-spv/src/sync/filters/stats.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/manager.rs
📚 Learning: 2025-12-01T08:00:17.310Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:00:17.310Z
Learning: Applies to dash-spv/src/**/*.rs : Use Tokio channels for inter-component message passing
Applied to files:
dash-spv/src/client/message_handler.rs
📚 Learning: 2025-12-01T08:00:17.311Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:00:17.311Z
Learning: Applies to dash-spv/src/sync/**/*.rs : Use state machines with `SyncState` enum to drive synchronization flow and state transitions
Applied to files:
dash-spv/src/client/message_handler.rsdash-spv/src/sync/sequential/phase_execution.rsdash-spv/src/sync/sequential/message_handlers.rsdash-spv/src/sync/filters/requests.rsdash-spv/src/sync/filters/retry.rsdash-spv/src/sync/filters/stats.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/headers.rsdash-spv/src/sync/filters/manager.rs
📚 Learning: 2025-12-01T08:00:17.310Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:00:17.310Z
Learning: Applies to dash-spv/src/**/*.rs : Use trait-based abstractions for swappable implementations (e.g., `NetworkManager`, `StorageManager`)
Applied to files:
dash-spv/src/client/message_handler.rsdash-spv/src/sync/sequential/phase_execution.rsdash-spv/src/sync/filters/stats.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/manager.rs
📚 Learning: 2025-12-01T08:00:17.310Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:00:17.310Z
Learning: Applies to dash-spv/src/**/*.rs : Use trait objects (`Arc<dyn StorageManager>`, `Arc<dyn NetworkManager>`) for runtime polymorphism
Applied to files:
dash-spv/src/client/message_handler.rsdash-spv/src/sync/filters/stats.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/manager.rs
📚 Learning: 2025-12-01T08:00:17.311Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:00:17.311Z
Learning: Follow a layered architecture with clear separation of concerns: `client/`, `network/`, `storage/`, `sync/`, `validation/`, `wallet/`, `types.rs`, and `error.rs`
Applied to files:
dash-spv/src/client/message_handler.rs
📚 Learning: 2025-12-01T08:00:17.310Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:00:17.310Z
Learning: Applies to dash-spv/src/sync/**/*.rs : Use sequential phase-based synchronization with `SequentialSyncManager` for organized sync phases
Applied to files:
dash-spv/src/client/message_handler.rsdash-spv/src/sync/sequential/phase_execution.rsdash-spv/src/sync/sequential/message_handlers.rsdash-spv/src/sync/filters/retry.rsdash-spv/src/sync/filters/stats.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/headers.rsdash-spv/src/sync/filters/manager.rs
📚 Learning: 2025-06-26T16:02:42.390Z
Learnt from: DCG-Claude
Repo: dashpay/rust-dashcore PR: 0
File: :0-0
Timestamp: 2025-06-26T16:02:42.390Z
Learning: Passing exclusive mutable references to network and storage managers into the sync manager in async Rust can lead to borrow checker issues or runtime contention if concurrent access is needed elsewhere. It's advisable to document this architectural tradeoff and consider refactoring to interior mutability or message passing for shared access as the codebase evolves.
Applied to files:
dash-spv/src/client/message_handler.rsdash-spv/src/sync/filters/stats.rsdash-spv/src/sync/filters/headers.rsdash-spv/src/sync/filters/manager.rs
📚 Learning: 2025-12-01T08:00:17.310Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:00:17.310Z
Learning: Applies to dash-spv/src/storage/**/*.rs : Implement `StorageManager` trait with segmented storage: headers in 10,000-header segments with index files, filters in separate storage, and state persistence in dedicated paths
Applied to files:
dash-spv/src/client/message_handler.rsdash-spv/src/sync/sequential/phase_execution.rsdash-spv/src/sync/sequential/message_handlers.rsdash-spv/src/sync/filters/retry.rsdash-spv/src/sync/filters/stats.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/headers.rsdash-spv/src/sync/filters/manager.rs
📚 Learning: 2025-12-01T08:00:17.310Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:00:17.310Z
Learning: Applies to dash-spv/src/**/*.rs : Use domain-specific error types (`NetworkError`, `StorageError`, `SyncError`, `ValidationError`, `SpvError`) for error handling
Applied to files:
dash-spv/src/client/message_handler.rsdash-spv/src/sync/filters/download.rs
📚 Learning: 2025-12-01T08:00:17.310Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:00:17.310Z
Learning: Applies to dash-spv/src/types.rs : Define common data structures in `types.rs` including `SyncProgress`, `ValidationMode`, `WatchItem`, etc.
Applied to files:
dash-spv/src/client/message_handler.rsdash-spv/src/sync/filters/retry.rsdash-spv/src/sync/filters/stats.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/manager.rs
📚 Learning: 2025-12-01T08:00:17.310Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:00:17.310Z
Learning: Applies to dash-spv/src/**/*.rs : Use async/await throughout the codebase with tokio runtime
Applied to files:
dash-spv/src/sync/sequential/phase_execution.rsdash-spv/src/sync/filters/retry.rsdash-spv/src/sync/filters/download.rs
📚 Learning: 2025-12-01T08:00:17.310Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:00:17.310Z
Learning: Applies to dash-spv/src/storage/**/*.rs : Use segmented storage with headers in 10,000-header chunks stored with index files for efficient retrieval
Applied to files:
dash-spv/src/sync/sequential/phase_execution.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/headers.rsdash-spv/src/sync/filters/manager.rs
📚 Learning: 2025-12-01T08:00:17.310Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:00:17.310Z
Learning: Applies to dash-spv/src/network/**/*.rs : Implement configurable timeouts with recovery mechanisms for network operations
Applied to files:
dash-spv/src/sync/sequential/phase_execution.rsdash-spv/src/sync/filters/retry.rs
📚 Learning: 2025-12-01T08:01:00.641Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: swift-dash-core-sdk/Examples/DashHDWalletExample/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:01:00.641Z
Learning: Applies to swift-dash-core-sdk/Examples/DashHDWalletExample/**/*.swift : Use asyncThrowingStream for blockchain synchronization with streaming API (syncProgressStream()) instead of callback-based approach when possible
Applied to files:
dash-spv/src/sync/filters/download.rs
📚 Learning: 2025-12-01T08:01:00.641Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: swift-dash-core-sdk/Examples/DashHDWalletExample/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:01:00.641Z
Learning: Applies to swift-dash-core-sdk/Examples/DashHDWalletExample/**/*.swift : Enable mempool tracking on SPV connection using the appropriate strategy (.fetchAll, .bloomFilter, .selective)
Applied to files:
dash-spv/src/sync/filters/download.rs
📚 Learning: 2025-12-01T08:00:50.440Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: swift-dash-core-sdk/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:00:50.440Z
Learning: Run `./sync-headers.sh` to copy updated headers to Swift SDK after rebuilding dash-spv-ffi
Applied to files:
dash-spv/src/sync/filters/headers.rs
📚 Learning: 2025-06-26T15:54:02.509Z
Learnt from: DCG-Claude
Repo: dashpay/rust-dashcore PR: 0
File: :0-0
Timestamp: 2025-06-26T15:54:02.509Z
Learning: The `StorageManager` trait in `dash-spv/src/storage/mod.rs` uses `&mut self` methods but is also `Send + Sync`, and implementations often use interior mutability for concurrency. This can be confusing, so explicit documentation should clarify thread-safety expectations and the rationale for the API design.
Applied to files:
dash-spv/src/sync/filters/headers.rsdash-spv/src/sync/filters/manager.rs
🧬 Code graph analysis (2)
dash-spv/src/sync/sequential/phase_execution.rs (2)
dash-spv/src/client/queries.rs (1)
network(46-49)dash-spv/src/client/core.rs (2)
network(166-168)storage(171-173)
dash-spv/src/sync/filters/download.rs (2)
dash-spv/src/client/queries.rs (1)
network(46-49)dash-spv/src/client/core.rs (2)
network(166-168)storage(171-173)
⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (2)
- GitHub Check: RPC Tests (stable, true)
- GitHub Check: Core Components Tests
🔇 Additional comments (26)
dash-spv/src/client/message_handler.rs (1)
8-10: Import cleanup aligns with removal of stats trackingThe narrowed import to
{MempoolState, SpvEvent}matches current usages in this module and drops the now-unused stats dependency cleanly. No further adjustments needed here.dash-spv/src/sync/filters/download.rs (3)
8-8: Documentation update aligns with refactoring.The module doc now correctly reflects the queue-based filter request management approach.
73-110: Method consolidation looks correct.The
sync_filtersmethod properly implements the unified queue-based sync approach. The flow is clear: check if already syncing, clear stale state, build request queue, then process it. The progress tracking viaSyncProgress::default()is appropriate since actual completion is tracked by the monitoring loop.
92-101: Comment and log message updates correctly reflect the simplified architecture.The removal of flow-control-specific language from comments and log messages is consistent with the PR's goal of making flow-control-based syncing the default (and only) approach.
dash-spv/src/sync/filters/stats.rs (1)
10-13: Simplified API correctly removes the flow-control flag.The return type change from
(usize, usize, bool)to(usize, usize)aligns with making flow control the default and only approach.dash-spv/src/sync/filters/requests.rs (1)
133-160: Documentation update correctly reflects the simplified description.The method still implements concurrency-limited request processing (what was previously called "flow control"), but the documentation now describes the behavior directly without referencing the removed configuration option. The logic itself is unchanged and correct.
dash-spv/src/sync/filters/retry.rs (1)
159-167: Simplified guard correctly removes flow-control branching.The method now unconditionally performs CFHeader timeout checks when
syncing_filter_headersis true, which aligns with making flow control the default path. The removal of the separate flow-control flag check is correct.dash-spv/src/sync/sequential/message_handlers.rs (2)
720-720: Comment simplification aligns with PR objectives.Removing the "For flow control" qualifier from the comment is consistent with the refactoring that makes flow control the default (and only) sync approach.
626-644: Remove the direct height insertion in lines 626-644; rely onmark_filter_receivedfor single recording.Lines 626-644 directly insert the filter height into
self.stats.received_filter_heights, butmark_filter_received(called on line 663) also records the same height viarecord_individual_filter_received. This results in the same height being inserted twice into the sameHashSet. WhileHashSet::insert()is idempotent and won't cause data corruption, this is redundant work. Move the height tracking solely intorecord_individual_filter_receivedor pass the height tomark_filter_receivedto avoid the duplicate storage lookup.⛔ Skipped due to learnings
Learnt from: CR Repo: dashpay/rust-dashcore PR: 0 File: dash-spv/CLAUDE.md:0-0 Timestamp: 2025-12-01T08:00:17.310Z Learning: Applies to dash-spv/src/sync/**/*.rs : Use sequential phase-based synchronization with `SequentialSyncManager` for organized sync phasesLearnt from: DCG-Claude Repo: dashpay/rust-dashcore PR: 0 File: :0-0 Timestamp: 2025-06-26T16:02:42.390Z Learning: Passing exclusive mutable references to network and storage managers into the sync manager in async Rust can lead to borrow checker issues or runtime contention if concurrent access is needed elsewhere. It's advisable to document this architectural tradeoff and consider refactoring to interior mutability or message passing for shared access as the codebase evolves.Learnt from: CR Repo: dashpay/rust-dashcore PR: 0 File: dash-spv/CLAUDE.md:0-0 Timestamp: 2025-12-01T08:00:17.310Z Learning: Applies to dash-spv/src/storage/**/*.rs : Implement `StorageManager` trait with segmented storage: headers in 10,000-header segments with index files, filters in separate storage, and state persistence in dedicated pathsLearnt from: DCG-Claude Repo: dashpay/rust-dashcore PR: 0 File: :0-0 Timestamp: 2025-06-26T15:54:02.509Z Learning: The `StorageManager` trait in `dash-spv/src/storage/mod.rs` uses `&mut self` methods but is also `Send + Sync`, and implementations often use interior mutability for concurrency. This can be confusing, so explicit documentation should clarify thread-safety expectations and the rationale for the API design.dash-spv/src/sync/sequential/phase_execution.rs (4)
115-130: Consolidated filter header sync entry point looks correct.The change from conditional flow-control branching to a single
start_sync_filter_headerscall aligns with the PR objective. The immediate phase transition when sync is not started (no peer support or already synced) is a good addition to avoid stalling.
169-171: Unified filter sync call.The simplified
sync_filterscall maintains the same parameter semantics while removing the flow-control branching. The optionalstart_heightandcountparameters are correctly passed.
313-317: Consistent timeout check for CFHeaders phase.The unconditional call to
check_cfheader_request_timeoutsis now the single path for timeout handling in the DownloadingCFHeaders phase, matching the unified approach.
465-469: Timeout recovery uses consistent method.The recovery path for
DownloadingCFHeadersnow consistently callscheck_cfheader_request_timeouts, matching the timeout check in the main phase handler.dash-spv/src/sync/filters/headers.rs (8)
154-156: Renamed handler aligns with unified approach.The
handle_cfheaders_messagenow delegates tohandle_filter_headers, which is the renamed/consolidated handler. The empty line at 156 is fine.
375-396: Renamed entry point:start_sync_filter_headers.The method signature and docstring correctly reflect the unified sync approach. The log message at line 396 now uses clearer terminology.
453-457: Updated log message reflects unified terminology.The log now says "sync initiated" rather than "flow control initiated," which is more accurate given the refactor removes the flow-control toggle concept.
579-591: Renamed internal handler:handle_filter_headers.The rename from
handle_cfheaders_with_flow_controltohandle_filter_headersis appropriate since flow-control is now the only path. The call toclear_filter_header_sync_state()at line 590 correctly uses the renamed method.
530-531: Documentation update for queue processing.The doc comment removal is fine since the method logic is self-explanatory.
647-647: Consistent use of renamed state-clearing method.
clear_filter_header_sync_state()is correctly called when sync completes.
785-791: Renamed state-clearing method.The method
clear_filter_header_sync_statereplacesclear_cfheader_flow_control_state. The implementation correctly clears all relevant state for CFHeaders sync.
157-332:start_sync_headersis actively used and should not be removed.The method has multiple test dependencies across the test suite:
dash-spv/tests/edge_case_filter_sync_test.rs(lines 150, 192)dash-spv/tests/filter_header_verification_test.rs(lines 203, 365, 533, 629)Removing it would break these tests. If consolidation to
start_sync_filter_headersis intended, ensure the tests are updated to use the new method first.Likely an incorrect or invalid review comment.
dash-spv/src/sync/filters/manager.rs (5)
4-4: Doc comment simplified.Removed "gap detection" reference, consistent with the removal of gap-related functionality.
31-31: Simplified doc comment for retry logic.The comment now just says "Retry logic" without mentioning flow-control specifics, which is appropriate.
41-87: Cleaned struct definition removes flow-control state.The
FilterSyncManagerstruct now has a cleaner state model:
- Removed:
flow_control_enabled,last_stability_check, gap-related fields- Added: CFHeaders-specific tracking fields (
pending_cfheader_requests,active_cfheader_requests, etc.)The phantom data fields (
_phantom_s,_phantom_n) are appropriate for maintaining the generic parameter relationship when the types are only used in trait bounds but not in field types.
111-111: Minor: Comment style for field grouping.The inline comment
// CFHeaders fieldsis helpful for understanding the struct initialization. Good practice for readability.
93-125: Constructor correctly initializes new CFHeaders fields.All new fields are initialized with sensible defaults or values from config:
max_cfheader_retriesfromconfig.max_cfheaders_retriesmax_concurrent_cfheader_requestsfromconfig.max_concurrent_cfheaders_requests_parallelcfheader_request_timeoutfromconfig.cfheaders_request_timeout_secs
| height, | ||
| cfilter.block_hash | ||
| ); | ||
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⚠️ Outside diff range comments (2)
dash-spv/src/sync/filters/download.rs (1)
286-306: Duplicate overlap-handling logic detected.Lines 286-297 and 300-306 contain nearly identical logging for overlapping filter headers. This appears to be unintentional duplication that should be consolidated.
Apply this diff to remove the duplicate block:
// If there's partial overlap, we need to handle it carefully if current_filter_tip >= start_height && start_height > 0 { tracing::info!( "Received overlapping filter headers. Current tip: {}, received range: {}-{}", current_filter_tip, start_height, stop_height ); // Verify that the overlapping portion matches what we have stored // This is done by the verify_filter_header_chain method // If verification fails, we'll skip storing to avoid corruption } - // Handle overlapping headers properly - if current_filter_tip >= start_height && start_height > 0 { - tracing::info!( - "Received overlapping filter headers. Current tip: {}, received range: {}-{}", - current_filter_tip, - start_height, - stop_height - ); - // Use the handle_overlapping_headers method which properly handles the chain continuitydash-spv/src/sync/filters/manager.rs (1)
92-93: Incorrect doc comment on constructor.The doc comment states "Verify that the received compact filter hashes to the expected filter header" but this is the
new()constructor. This appears to be a copy-paste error from another method.- /// Verify that the received compact filter hashes to the expected filter header + /// Creates a new FilterSyncManager with the given configuration. pub fn new(config: &ClientConfig, received_filter_heights: SharedFilterHeights) -> Self {
🧹 Nitpick comments (5)
dash-spv/src/sync/filters/stats.rs (1)
20-26: Consider logging when lock acquisition fails.
get_received_filter_countsilently returns 0 when the lock cannot be acquired. While acceptable for stats, this could mask contention issues during debugging.pub fn get_received_filter_count(&self) -> u32 { match self.received_filter_heights.try_lock() { Ok(heights) => heights.len() as u32, - Err(_) => 0, + Err(_) => { + tracing::trace!("Could not acquire lock for received_filter_heights, returning 0"); + 0 + } } }dash-spv/src/sync/filters/headers.rs (1)
157-332: Extract shared initialization logic into a helper method to eliminate duplication.Both
start_sync_headers(lines 157–332) andstart_sync_filter_headers(lines 376–460) contain nearly identical initialization code:
- Peer compact filter support verification
- Current filter tip and header tip retrieval
- Next height determination (identical logic including checkpoint handling)
- Sync state setup
The methods differ only in request strategy:
start_sync_headerssends a single request viarequest_filter_headers, whilestart_sync_filter_headersuses a queue-based approach. Extract the common initialization into a helper method (e.g.,initialize_filter_sync) and call it from both, passing a callback or returning initialized state to let each method handle its request strategy. This preserves the different request patterns while eliminating the duplicated setup code.dash-spv/src/sync/filters/manager.rs (2)
42-44: Consider removing underscore prefix from_configor removing the field entirely.The
_configfield uses an underscore prefix (suggesting it's intentionally unused), but it's actively used during construction to initializemax_cfheader_retries,max_concurrent_cfheader_requests, andcfheader_request_timeout. After construction, the field appears unused.Two options:
- If
_configwill be needed for future access, rename toconfig(no underscore)- If not needed post-construction, remove the field entirely since the relevant values are already extracted
pub struct FilterSyncManager<S: StorageManager, N: NetworkManager> { pub(super) _phantom_s: std::marker::PhantomData<S>, pub(super) _phantom_n: std::marker::PhantomData<N>, - pub(super) _config: ClientConfig,
194-200: Stale comment block can be removed or clarified.This comment block describes storing the genesis filter header but ends with "Note: We'll handle this in the calling function since we need mutable storage access" - the code doesn't actually do anything here. Either remove this comment or document which calling function handles this case.
dash-spv/src/client/message_handler.rs (1)
397-416: Avoid double‑callingshould_fetch_transactionand calling it when fetch is disabledIn the
Inventory::Transactionarm,filter.should_fetch_transaction(&txid).awaitis:
- Called in the
if self.config.fetch_mempool_transactions && ...condition, and- Called again inside the debug log (and this second call still runs even when
fetch_mempool_transactionsisfalse).If
should_fetch_transactionis expensive or mutates internal state (e.g., capacity counters or relevance tracking), this double invocation can both waste work and subtly affect behavior, and the call when fetching is disabled is surprising.Consider computing it once and reusing it:
- if let Some(filter) = self.mempool_filter { - if self.config.fetch_mempool_transactions - && filter.should_fetch_transaction(&txid).await - { + if let Some(filter) = self.mempool_filter { + let should_fetch = if self.config.fetch_mempool_transactions { + filter.should_fetch_transaction(&txid).await + } else { + false + }; + + if should_fetch { tracing::info!("📥 Requesting transaction {}", txid); let getdata = NetworkMessage::GetData(vec![item]); if let Err(e) = self.network.send_message(getdata).await { tracing::error!("Failed to request transaction {}: {}", txid, e); } } else { - tracing::debug!("Not fetching transaction {} (fetch_mempool_transactions={}, should_fetch={})", - txid, - self.config.fetch_mempool_transactions, - filter.should_fetch_transaction(&txid).await - ); + tracing::debug!( + "Not fetching transaction {} (fetch_mempool_transactions={}, should_fetch={})", + txid, + self.config.fetch_mempool_transactions, + should_fetch + ); }This keeps behavior clearer and avoids unexpected side effects in the mempool filter. Based on learnings, mempool tracking is fully integrated here, so avoiding unnecessary filter state interactions is worthwhile.
📜 Review details
Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro
📒 Files selected for processing (21)
dash-spv/src/client/config.rs(0 hunks)dash-spv/src/client/config_test.rs(0 hunks)dash-spv/src/client/filter_sync.rs(0 hunks)dash-spv/src/client/message_handler.rs(1 hunks)dash-spv/src/client/mod.rs(0 hunks)dash-spv/src/client/sync_coordinator.rs(0 hunks)dash-spv/src/network/tests.rs(0 hunks)dash-spv/src/sync/filters/download.rs(3 hunks)dash-spv/src/sync/filters/gaps.rs(0 hunks)dash-spv/src/sync/filters/headers.rs(9 hunks)dash-spv/src/sync/filters/manager.rs(3 hunks)dash-spv/src/sync/filters/matching.rs(0 hunks)dash-spv/src/sync/filters/mod.rs(0 hunks)dash-spv/src/sync/filters/requests.rs(1 hunks)dash-spv/src/sync/filters/retry.rs(1 hunks)dash-spv/src/sync/filters/stats.rs(1 hunks)dash-spv/src/sync/sequential/message_handlers.rs(2 hunks)dash-spv/src/sync/sequential/phase_execution.rs(4 hunks)dash-spv/tests/cfheader_gap_test.rs(0 hunks)dash-spv/tests/edge_case_filter_sync_test.rs(0 hunks)dash-spv/tests/simple_gap_test.rs(0 hunks)
💤 Files with no reviewable changes (12)
- dash-spv/src/sync/filters/mod.rs
- dash-spv/src/client/config_test.rs
- dash-spv/tests/edge_case_filter_sync_test.rs
- dash-spv/tests/cfheader_gap_test.rs
- dash-spv/src/client/mod.rs
- dash-spv/src/client/config.rs
- dash-spv/src/client/filter_sync.rs
- dash-spv/src/sync/filters/matching.rs
- dash-spv/src/client/sync_coordinator.rs
- dash-spv/src/network/tests.rs
- dash-spv/tests/simple_gap_test.rs
- dash-spv/src/sync/filters/gaps.rs
🚧 Files skipped from review as they are similar to previous changes (2)
- dash-spv/src/sync/sequential/message_handlers.rs
- dash-spv/src/sync/filters/retry.rs
🧰 Additional context used
📓 Path-based instructions (3)
**/*.rs
📄 CodeRabbit inference engine (CLAUDE.md)
**/*.rs: Never hardcode network parameters, addresses, or keys in Rust code
Use proper error types with thiserror crate and propagate errors appropriately in Rust code
Use tokio runtime for async operations in Rust code
Use conditional compilation with feature flags for optional features
Write unit tests for new functionality in Rust
Format Rust code with cargo fmt before committing
Ensure clippy passes with all warnings as errors on all Rust code
**/*.rs: Each crate keeps sources insrc/; unit tests live alongside code with#[cfg(test)]
Maintain MSRV of 1.89 for Rust code
Format Rust code withrustfmt(seerustfmt.toml); runcargo fmt --allbefore commits
Lint Rust code withclippy; avoidunwrap()/expect()in library code; use error types (e.g.,thiserror)
Usesnake_casefor function and variable names in Rust
UseUpperCamelCasefor types and traits in Rust
UseSCREAMING_SNAKE_CASEfor constants in Rust
Follow mixed editions (2021/2024) and crate-specific idioms; prefer async viatokiowhere applicable
Unit tests should be placed near code with descriptive names (e.g.,test_parse_address_mainnet)
Use#[ignore]for network-dependent or long-running tests; run with-- --ignoredflag
Never commit secrets or real keys; avoid logging sensitive data in Rust code
Keep test vectors deterministic in Rust test code
Files:
dash-spv/src/sync/sequential/phase_execution.rsdash-spv/src/client/message_handler.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/stats.rsdash-spv/src/sync/filters/manager.rsdash-spv/src/sync/filters/headers.rsdash-spv/src/sync/filters/requests.rs
dash-spv/src/**/*.rs
📄 CodeRabbit inference engine (dash-spv/CLAUDE.md)
dash-spv/src/**/*.rs: Use trait-based abstractions for swappable implementations (e.g.,NetworkManager,StorageManager)
Use async/await throughout the codebase with tokio runtime
Use domain-specific error types (NetworkError,StorageError,SyncError,ValidationError,SpvError) for error handling
Use trait objects (Arc<dyn StorageManager>,Arc<dyn NetworkManager>) for runtime polymorphism
Use Tokio channels for inter-component message passing
Add comprehensive unit tests in-module for individual components
Files:
dash-spv/src/sync/sequential/phase_execution.rsdash-spv/src/client/message_handler.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/stats.rsdash-spv/src/sync/filters/manager.rsdash-spv/src/sync/filters/headers.rsdash-spv/src/sync/filters/requests.rs
dash-spv/src/sync/**/*.rs
📄 CodeRabbit inference engine (dash-spv/CLAUDE.md)
dash-spv/src/sync/**/*.rs: Use sequential phase-based synchronization withSequentialSyncManagerfor organized sync phases
Use state machines withSyncStateenum to drive synchronization flow and state transitions
Files:
dash-spv/src/sync/sequential/phase_execution.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/stats.rsdash-spv/src/sync/filters/manager.rsdash-spv/src/sync/filters/headers.rsdash-spv/src/sync/filters/requests.rs
🧠 Learnings (19)
📓 Common learnings
Learnt from: DCG-Claude
Repo: dashpay/rust-dashcore PR: 0
File: :0-0
Timestamp: 2025-06-26T16:01:37.609Z
Learning: The mempool tracking infrastructure (UnconfirmedTransaction, MempoolState, configuration, and mempool_filter.rs) is fully implemented and integrated in the Dash SPV client as of this PR, including client logic, FFI APIs, and tests.
📚 Learning: 2025-12-01T08:00:17.379Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:00:17.379Z
Learning: Applies to dash-spv/src/sync/**/*.rs : Use sequential phase-based synchronization with `SequentialSyncManager` for organized sync phases
Applied to files:
dash-spv/src/sync/sequential/phase_execution.rsdash-spv/src/client/message_handler.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/stats.rsdash-spv/src/sync/filters/manager.rsdash-spv/src/sync/filters/headers.rsdash-spv/src/sync/filters/requests.rs
📚 Learning: 2025-12-01T08:00:17.379Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:00:17.379Z
Learning: Applies to dash-spv/src/storage/**/*.rs : Implement `StorageManager` trait with segmented storage: headers in 10,000-header segments with index files, filters in separate storage, and state persistence in dedicated paths
Applied to files:
dash-spv/src/sync/sequential/phase_execution.rsdash-spv/src/client/message_handler.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/stats.rsdash-spv/src/sync/filters/manager.rsdash-spv/src/sync/filters/headers.rsdash-spv/src/sync/filters/requests.rs
📚 Learning: 2025-12-01T08:00:17.379Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:00:17.379Z
Learning: Applies to dash-spv/src/sync/**/*.rs : Use state machines with `SyncState` enum to drive synchronization flow and state transitions
Applied to files:
dash-spv/src/sync/sequential/phase_execution.rsdash-spv/src/client/message_handler.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/stats.rsdash-spv/src/sync/filters/manager.rsdash-spv/src/sync/filters/headers.rsdash-spv/src/sync/filters/requests.rs
📚 Learning: 2025-12-01T08:00:17.379Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:00:17.379Z
Learning: Applies to dash-spv/src/storage/**/*.rs : Use segmented storage with headers in 10,000-header chunks stored with index files for efficient retrieval
Applied to files:
dash-spv/src/sync/sequential/phase_execution.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/manager.rsdash-spv/src/sync/filters/headers.rs
📚 Learning: 2025-12-01T08:00:17.379Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:00:17.379Z
Learning: Applies to dash-spv/src/**/*.rs : Use async/await throughout the codebase with tokio runtime
Applied to files:
dash-spv/src/sync/sequential/phase_execution.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/requests.rs
📚 Learning: 2025-12-01T08:00:17.379Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:00:17.379Z
Learning: Applies to dash-spv/src/network/**/*.rs : Implement configurable timeouts with recovery mechanisms for network operations
Applied to files:
dash-spv/src/sync/sequential/phase_execution.rs
📚 Learning: 2025-12-01T08:00:17.379Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:00:17.379Z
Learning: Applies to dash-spv/src/**/*.rs : Use trait-based abstractions for swappable implementations (e.g., `NetworkManager`, `StorageManager`)
Applied to files:
dash-spv/src/sync/sequential/phase_execution.rsdash-spv/src/client/message_handler.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/stats.rsdash-spv/src/sync/filters/manager.rsdash-spv/src/sync/filters/headers.rs
📚 Learning: 2025-06-26T16:01:37.609Z
Learnt from: DCG-Claude
Repo: dashpay/rust-dashcore PR: 0
File: :0-0
Timestamp: 2025-06-26T16:01:37.609Z
Learning: The mempool tracking infrastructure (UnconfirmedTransaction, MempoolState, configuration, and mempool_filter.rs) is fully implemented and integrated in the Dash SPV client as of this PR, including client logic, FFI APIs, and tests.
Applied to files:
dash-spv/src/client/message_handler.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/stats.rsdash-spv/src/sync/filters/manager.rsdash-spv/src/sync/filters/headers.rsdash-spv/src/sync/filters/requests.rs
📚 Learning: 2025-12-01T08:00:17.379Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:00:17.379Z
Learning: Applies to dash-spv/src/**/*.rs : Use trait objects (`Arc<dyn StorageManager>`, `Arc<dyn NetworkManager>`) for runtime polymorphism
Applied to files:
dash-spv/src/client/message_handler.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/stats.rsdash-spv/src/sync/filters/manager.rs
📚 Learning: 2025-12-01T08:00:17.379Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:00:17.379Z
Learning: Follow a layered architecture with clear separation of concerns: `client/`, `network/`, `storage/`, `sync/`, `validation/`, `wallet/`, `types.rs`, and `error.rs`
Applied to files:
dash-spv/src/client/message_handler.rs
📚 Learning: 2025-06-26T16:02:42.390Z
Learnt from: DCG-Claude
Repo: dashpay/rust-dashcore PR: 0
File: :0-0
Timestamp: 2025-06-26T16:02:42.390Z
Learning: Passing exclusive mutable references to network and storage managers into the sync manager in async Rust can lead to borrow checker issues or runtime contention if concurrent access is needed elsewhere. It's advisable to document this architectural tradeoff and consider refactoring to interior mutability or message passing for shared access as the codebase evolves.
Applied to files:
dash-spv/src/client/message_handler.rsdash-spv/src/sync/filters/stats.rsdash-spv/src/sync/filters/manager.rsdash-spv/src/sync/filters/headers.rs
📚 Learning: 2025-12-01T08:00:17.379Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:00:17.379Z
Learning: Applies to dash-spv/src/**/*.rs : Use domain-specific error types (`NetworkError`, `StorageError`, `SyncError`, `ValidationError`, `SpvError`) for error handling
Applied to files:
dash-spv/src/client/message_handler.rsdash-spv/src/sync/filters/download.rs
📚 Learning: 2025-12-01T08:00:17.379Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:00:17.379Z
Learning: Applies to dash-spv/src/types.rs : Define common data structures in `types.rs` including `SyncProgress`, `ValidationMode`, `WatchItem`, etc.
Applied to files:
dash-spv/src/client/message_handler.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/stats.rsdash-spv/src/sync/filters/manager.rs
📚 Learning: 2025-12-01T08:01:00.652Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: swift-dash-core-sdk/Examples/DashHDWalletExample/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:01:00.652Z
Learning: Applies to swift-dash-core-sdk/Examples/DashHDWalletExample/**/*.swift : Use asyncThrowingStream for blockchain synchronization with streaming API (syncProgressStream()) instead of callback-based approach when possible
Applied to files:
dash-spv/src/sync/filters/download.rs
📚 Learning: 2025-12-01T08:00:17.379Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:00:17.379Z
Learning: Applies to dash-spv/src/wallet/**/*.rs : Implement wallet functionality with UTXO tracking, balance calculation with confirmation states, and transaction processing
Applied to files:
dash-spv/src/sync/filters/download.rs
📚 Learning: 2025-06-26T15:54:02.509Z
Learnt from: DCG-Claude
Repo: dashpay/rust-dashcore PR: 0
File: :0-0
Timestamp: 2025-06-26T15:54:02.509Z
Learning: The `StorageManager` trait in `dash-spv/src/storage/mod.rs` uses `&mut self` methods but is also `Send + Sync`, and implementations often use interior mutability for concurrency. This can be confusing, so explicit documentation should clarify thread-safety expectations and the rationale for the API design.
Applied to files:
dash-spv/src/sync/filters/manager.rsdash-spv/src/sync/filters/headers.rsdash-spv/src/sync/filters/requests.rs
📚 Learning: 2025-12-01T08:00:50.618Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: swift-dash-core-sdk/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:00:50.618Z
Learning: Run `./sync-headers.sh` to copy updated headers to Swift SDK after rebuilding dash-spv-ffi
Applied to files:
dash-spv/src/sync/filters/headers.rs
📚 Learning: 2025-12-01T08:00:50.618Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: swift-dash-core-sdk/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:00:50.618Z
Learning: Applies to swift-dash-core-sdk/**/*.rs : Implement new FFI functions in Rust with `#[no_mangle] extern "C"` annotation in dash-spv-ffi
Applied to files:
dash-spv/src/sync/filters/headers.rs
🧬 Code graph analysis (2)
dash-spv/src/sync/filters/download.rs (2)
dash-spv/src/client/queries.rs (1)
network(48-51)dash-spv/src/client/core.rs (2)
network(166-168)storage(171-173)
dash-spv/src/sync/filters/headers.rs (2)
dash-spv/src/client/core.rs (2)
storage(171-173)network(166-168)dash-spv/src/client/queries.rs (1)
network(48-51)
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- GitHub Check: fuzz (hashes_cbor)
- GitHub Check: fuzz (dash_deserialize_script)
- GitHub Check: fuzz (dash_deserialize_block)
- GitHub Check: fuzz (hashes_json)
- GitHub Check: fuzz (dash_deserialize_amount)
- GitHub Check: fuzz (dash_deserialize_address)
- GitHub Check: SPV Components Tests
- GitHub Check: RPC Tests (stable, true)
- GitHub Check: Core Components Tests
- GitHub Check: Key Wallet Components Tests
- GitHub Check: Pre-commit (ubuntu-latest)
- GitHub Check: Pre-commit (macos-latest)
🔇 Additional comments (16)
dash-spv/src/sync/filters/download.rs (2)
73-110: LGTM - Clean queue-based sync flow.The refactored
sync_filtersfunction properly:
- Clears stale state before building the request queue
- Delegates to the queue-based processing flow
- Returns early if sync is already in progress
The flow aligns well with the PR objective of consolidating to a single sync approach.
112-150: LGTM - Clean filter tracking implementation.The
mark_filter_receivedfunction properly:
- Records received filters
- Checks for batch completion
- Logs progress at reasonable intervals (every 1000 filters)
- Cleans up completed requests from active tracking
dash-spv/src/sync/filters/stats.rs (1)
10-18: LGTM - Simplified stats API.The renamed
get_filter_sync_stateandget_available_request_slotsprovide a cleaner API surface aligned with the unified queue-based sync approach.dash-spv/src/sync/filters/requests.rs (3)
133-160: LGTM - Clean initial batch dispatch.The
process_filter_request_queuemethod properly:
- Sends up to
MAX_CONCURRENT_FILTER_REQUESTSinitial requests- Tracks active requests
- Logs the queue state after dispatch
The
_storageparameter appears to be reserved for potential future use; this is acceptable.
162-207: LGTM - Good retry delay pattern.The retry delay (lines 202-204) is correctly applied only for retry requests, avoiding unnecessary delays during normal operation. This is a good pattern for preventing peer hammering during retries.
209-239: LGTM - Clean queue processing.The
process_next_queued_requestsproperly fills available slots and logs progress. The break on empty queue is correct.dash-spv/src/sync/sequential/phase_execution.rs (4)
115-130: LGTM - Unified CFHeaders sync path.The
DownloadingCFHeadersphase now uses the unifiedstart_sync_filter_headersmethod, properly handling the case where no peers support filters or sync is already complete by transitioning immediately.
169-171: LGTM - Unified filter sync call.The
sync_filterscall properly passesSome(start_height)andSome(count)parameters, aligning with the new queue-based approach.
313-317: LGTM - Consistent timeout handling.The
DownloadingCFHeadersphase now consistently usescheck_cfheader_request_timeoutswithout conditional flow-control branching.
331-424: Robust filter sync stall recovery.The filter download timeout handling is comprehensive:
- Checks for timed-out requests
- Attempts recovery by sending more requests if slots are available
- Retries the entire phase up to
max_phase_retries- Forces completion as a last resort to prevent permanent stalls
This is a well-designed recovery mechanism.
dash-spv/src/sync/filters/headers.rs (3)
144-156: LGTM - Clean message handling delegation.The
handle_cfheaders_messageproperly delegates to the unifiedhandle_filter_headersflow, maintaining separation between message reception and processing logic.
579-652: LGTM - Well-structured buffered processing.The
handle_filter_headersmethod properly:
- Handles empty responses as sync completion
- Processes in-order batches immediately
- Buffers out-of-order batches for later processing
- Ignores duplicate/already-processed batches
- Triggers queue processing after each batch
This is a clean implementation of sequential batch processing with buffering.
785-791: LGTM - Clean state clearing.The renamed
clear_filter_header_sync_stateproperly clears all queue and tracking state, ensuring a clean slate for new sync operations.dash-spv/src/sync/filters/manager.rs (2)
89-125: LGTM - Constructor properly initializes CFHeaders-centric state.The constructor correctly wires up the new CFHeaders-related fields from configuration. The removal of flow-control and gap-related fields simplifies the state management as intended by this refactor.
248-301: State management methods are well-structured.The reset and clearing methods provide clear separation between:
reset(): Full reset of sync stateclear_filter_sync_state(): Internal request tracking onlyreset_pending_requests(): All pending state without heightsclear_filter_state(): Complete clear including async heightsThis layered approach supports different recovery scenarios.
dash-spv/src/client/message_handler.rs (1)
9-25: SpvStats removal from MessageHandler wiring looks consistentDropping
SpvStatsfrom the imports and struct fields while keepingMempoolStateandSpvEventas the remaining runtime tracking hooks is coherent with making flow-control-based syncing the single path. The constructor signature and struct fields are internally consistent; there are no dangling stats references here.
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dash-spv/src/sync/filters/manager.rs (1)
41-87: Add validation for CFHeaders configuration fields to prevent zero-value bugs.The struct correctly uses configuration values from
_config(lines 115-120), andClientConfighas sensible defaults (50 concurrent requests, 30-second timeout, 3 retries). However, thevalidate()method inClientConfigis missing constraints for these critical flow control parameters. Unlikemax_concurrent_filter_requests(which validates > 0), the CFHeaders fields lack validation:
max_concurrent_cfheaders_requests_parallel(default: 50)cfheaders_request_timeout_secs(default: 30)max_cfheaders_retries(default: 3)Add validation in
ClientConfig::validate()to ensure these fields are > 0, matching the pattern used for other concurrent request limits.
🧹 Nitpick comments (4)
dash-spv/src/sync/filters/stats.rs (1)
20-26: Consider documenting the lock failure fallback behavior.The
try_lock()pattern with a0fallback is pragmatic for stats, but callers cannot distinguish between "no filters received" and "lock acquisition failed." Consider adding a doc comment noting this behavior, or optionally returnOption<u32>to make the failure case explicit.Example documentation improvement:
- /// Get the total number of filters received. + /// Get the total number of filters received. + /// + /// Returns 0 if the internal lock cannot be acquired (e.g., if another + /// operation is updating the filter heights). pub fn get_received_filter_count(&self) -> u32 {dash-spv/src/client/message_handler.rs (3)
400-416: Avoid callingshould_fetch_transactiontwice (perf + potential behavioural divergence)In the
Inventory::Transactionbranch you awaitfilter.should_fetch_transaction(&txid)both in theifcondition and again inside the debug log on theelsepath. That repeats async work and could change behaviour ifshould_fetch_transactionhas side effects.Consider caching the result:
- if let Some(filter) = self.mempool_filter { - if self.config.fetch_mempool_transactions - && filter.should_fetch_transaction(&txid).await - { + if let Some(filter) = self.mempool_filter { + let should_fetch = filter.should_fetch_transaction(&txid).await; + if self.config.fetch_mempool_transactions && should_fetch { tracing::info!("📥 Requesting transaction {}", txid); // Request the transaction let getdata = NetworkMessage::GetData(vec![item]); if let Err(e) = self.network.send_message(getdata).await { tracing::error!("Failed to request transaction {}: {}", txid, e); } } else { - tracing::debug!("Not fetching transaction {} (fetch_mempool_transactions={}, should_fetch={})", - txid, - self.config.fetch_mempool_transactions, - filter.should_fetch_transaction(&txid).await - ); + tracing::debug!( + "Not fetching transaction {} (fetch_mempool_transactions={}, should_fetch={})", + txid, + self.config.fetch_mempool_transactions, + should_fetch + ); }
526-543: Unused oneshot receiver inprocess_new_block
process_new_blockcreates a oneshot channel but immediately drops the receiver:let (response_tx, _response_rx) = tokio::sync::oneshot::channel(); let task = BlockProcessingTask::ProcessBlock { block: Box::new(block), response_tx };If the processing side tries to send a response, it will always see a closed channel, and you also pay a small overhead for constructing an unused receiver. If this call site is intentionally fire-and-forget, you could:
- Either make the
ProcessBlockvariant not carry a response channel for this path, or- Allow
response_txto beOption<oneshot::Sender<_>>and passNonewhen you truly don’t care about the result.That would better reflect intent and avoid spurious send errors on the processing side.
67-68: Minor: duplicated discriminant logging for some message typesYou log the message discriminant at the beginning of
handle_network_messageand again in the final_arm:
- Line 67:
Client handling network message: ...- Lines 353–355:
Received network message: ...in the catch-all branch.For message types that only hit the default arm, this results in effectively duplicate logs with the same discriminant. Very low impact, but if log volume matters you might want to drop one of them or adjust the second log to add extra context instead.
Also applies to: 353-355
📜 Review details
Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro
📒 Files selected for processing (21)
dash-spv/src/client/config.rs(0 hunks)dash-spv/src/client/config_test.rs(0 hunks)dash-spv/src/client/filter_sync.rs(0 hunks)dash-spv/src/client/message_handler.rs(1 hunks)dash-spv/src/client/mod.rs(0 hunks)dash-spv/src/client/sync_coordinator.rs(0 hunks)dash-spv/src/network/tests.rs(0 hunks)dash-spv/src/sync/filters/download.rs(3 hunks)dash-spv/src/sync/filters/gaps.rs(0 hunks)dash-spv/src/sync/filters/headers.rs(9 hunks)dash-spv/src/sync/filters/manager.rs(3 hunks)dash-spv/src/sync/filters/matching.rs(0 hunks)dash-spv/src/sync/filters/mod.rs(0 hunks)dash-spv/src/sync/filters/requests.rs(1 hunks)dash-spv/src/sync/filters/retry.rs(1 hunks)dash-spv/src/sync/filters/stats.rs(1 hunks)dash-spv/src/sync/sequential/message_handlers.rs(2 hunks)dash-spv/src/sync/sequential/phase_execution.rs(4 hunks)dash-spv/tests/cfheader_gap_test.rs(0 hunks)dash-spv/tests/edge_case_filter_sync_test.rs(0 hunks)dash-spv/tests/simple_gap_test.rs(0 hunks)
💤 Files with no reviewable changes (12)
- dash-spv/src/client/config_test.rs
- dash-spv/tests/edge_case_filter_sync_test.rs
- dash-spv/tests/simple_gap_test.rs
- dash-spv/src/client/mod.rs
- dash-spv/tests/cfheader_gap_test.rs
- dash-spv/src/client/sync_coordinator.rs
- dash-spv/src/client/filter_sync.rs
- dash-spv/src/sync/filters/mod.rs
- dash-spv/src/client/config.rs
- dash-spv/src/sync/filters/matching.rs
- dash-spv/src/sync/filters/gaps.rs
- dash-spv/src/network/tests.rs
🚧 Files skipped from review as they are similar to previous changes (2)
- dash-spv/src/sync/sequential/message_handlers.rs
- dash-spv/src/sync/sequential/phase_execution.rs
🧰 Additional context used
📓 Path-based instructions (4)
**/*.rs
📄 CodeRabbit inference engine (CLAUDE.md)
**/*.rs: Never hardcode network parameters, addresses, or keys in Rust code
Use proper error types with thiserror crate and propagate errors appropriately in Rust code
Use tokio runtime for async operations in Rust code
Use conditional compilation with feature flags for optional features
Write unit tests for new functionality in Rust
Format Rust code with cargo fmt before committing
Ensure clippy passes with all warnings as errors on all Rust code
**/*.rs: Each crate keeps sources insrc/; unit tests live alongside code with#[cfg(test)]
Maintain MSRV of 1.89 for Rust code
Format Rust code withrustfmt(seerustfmt.toml); runcargo fmt --allbefore commits
Lint Rust code withclippy; avoidunwrap()/expect()in library code; use error types (e.g.,thiserror)
Usesnake_casefor function and variable names in Rust
UseUpperCamelCasefor types and traits in Rust
UseSCREAMING_SNAKE_CASEfor constants in Rust
Follow mixed editions (2021/2024) and crate-specific idioms; prefer async viatokiowhere applicable
Unit tests should be placed near code with descriptive names (e.g.,test_parse_address_mainnet)
Use#[ignore]for network-dependent or long-running tests; run with-- --ignoredflag
Never commit secrets or real keys; avoid logging sensitive data in Rust code
Keep test vectors deterministic in Rust test code
Files:
dash-spv/src/sync/filters/stats.rsdash-spv/src/client/message_handler.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/retry.rsdash-spv/src/sync/filters/requests.rsdash-spv/src/sync/filters/headers.rsdash-spv/src/sync/filters/manager.rs
dash-spv/**/*.rs
📄 CodeRabbit inference engine (dash-spv/CLAUDE.md)
dash-spv/**/*.rs: Use trait-based abstractions for core components likeNetworkManagerandStorageManagerto enable swappable implementations
Use async/await throughout the codebase with tokio runtime for all asynchronous operations
Use Minimum Rust Version (MSRV) 1.89 and ensure all code compiles withcargo check --all-features
Files:
dash-spv/src/sync/filters/stats.rsdash-spv/src/client/message_handler.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/retry.rsdash-spv/src/sync/filters/requests.rsdash-spv/src/sync/filters/headers.rsdash-spv/src/sync/filters/manager.rs
dash-spv/src/sync/**/*.rs
📄 CodeRabbit inference engine (dash-spv/CLAUDE.md)
Synchronization should use
SyncManagerfor phase-based coordination: Phase 1 (Headers), Phase 2 (Masternode List), Phase 3 (Filter Headers), Phase 4 (Filters), Phase 5 (Blocks)
Files:
dash-spv/src/sync/filters/stats.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/retry.rsdash-spv/src/sync/filters/requests.rsdash-spv/src/sync/filters/headers.rsdash-spv/src/sync/filters/manager.rs
dash-spv/src/client/**/*.rs
📄 CodeRabbit inference engine (dash-spv/CLAUDE.md)
Client module should provide high-level API through
DashSpvClientand configuration viaClientConfig
Files:
dash-spv/src/client/message_handler.rs
🧠 Learnings (20)
📚 Learning: 2025-12-04T15:51:59.617Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-04T15:51:59.617Z
Learning: Applies to dash-spv/src/sync/**/*.rs : Synchronization should use `SyncManager` for phase-based coordination: Phase 1 (Headers), Phase 2 (Masternode List), Phase 3 (Filter Headers), Phase 4 (Filters), Phase 5 (Blocks)
Applied to files:
dash-spv/src/sync/filters/stats.rsdash-spv/src/client/message_handler.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/retry.rsdash-spv/src/sync/filters/requests.rsdash-spv/src/sync/filters/headers.rsdash-spv/src/sync/filters/manager.rs
📚 Learning: 2025-06-26T16:01:37.609Z
Learnt from: DCG-Claude
Repo: dashpay/rust-dashcore PR: 0
File: :0-0
Timestamp: 2025-06-26T16:01:37.609Z
Learning: The mempool tracking infrastructure (UnconfirmedTransaction, MempoolState, configuration, and mempool_filter.rs) is fully implemented and integrated in the Dash SPV client as of this PR, including client logic, FFI APIs, and tests.
Applied to files:
dash-spv/src/sync/filters/stats.rsdash-spv/src/client/message_handler.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/requests.rsdash-spv/src/sync/filters/headers.rsdash-spv/src/sync/filters/manager.rs
📚 Learning: 2025-12-04T15:51:59.617Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-04T15:51:59.617Z
Learning: Applies to dash-spv/**/*.rs : Use trait-based abstractions for core components like `NetworkManager` and `StorageManager` to enable swappable implementations
Applied to files:
dash-spv/src/sync/filters/stats.rsdash-spv/src/client/message_handler.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/retry.rsdash-spv/src/sync/filters/manager.rs
📚 Learning: 2025-06-26T16:02:42.390Z
Learnt from: DCG-Claude
Repo: dashpay/rust-dashcore PR: 0
File: :0-0
Timestamp: 2025-06-26T16:02:42.390Z
Learning: Passing exclusive mutable references to network and storage managers into the sync manager in async Rust can lead to borrow checker issues or runtime contention if concurrent access is needed elsewhere. It's advisable to document this architectural tradeoff and consider refactoring to interior mutability or message passing for shared access as the codebase evolves.
Applied to files:
dash-spv/src/sync/filters/stats.rsdash-spv/src/client/message_handler.rsdash-spv/src/sync/filters/headers.rsdash-spv/src/sync/filters/manager.rs
📚 Learning: 2025-12-04T15:51:59.617Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-04T15:51:59.617Z
Learning: Applies to dash-spv/src/network/**/*.rs : Network module should handle TCP connections, handshake management, message routing, and peer management following Dash protocol implementation
Applied to files:
dash-spv/src/client/message_handler.rs
📚 Learning: 2025-12-04T15:51:59.617Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-04T15:51:59.617Z
Learning: Applies to dash-spv/src/storage/**/*.rs : Storage module should provide abstraction via `StorageManager` trait with concrete implementations for `MemoryStorageManager` and `DiskStorageManager`
Applied to files:
dash-spv/src/client/message_handler.rsdash-spv/src/sync/filters/download.rs
📚 Learning: 2025-12-04T15:51:59.617Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-04T15:51:59.617Z
Learning: Applies to dash-spv/src/error.rs : Maintain domain-specific error types in `error.rs` with variants for `NetworkError`, `StorageError`, `SyncError`, `ValidationError`, and `SpvError` (top-level wrapper)
Applied to files:
dash-spv/src/client/message_handler.rsdash-spv/src/sync/filters/download.rs
📚 Learning: 2025-12-04T15:51:59.617Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-04T15:51:59.617Z
Learning: Applies to dash-spv/src/wallet/**/*.rs : Wallet module should provide UTXO tracking via `Utxo` struct, balance calculation with confirmation states, and transaction processing via `TransactionProcessor`
Applied to files:
dash-spv/src/client/message_handler.rs
📚 Learning: 2025-12-01T08:00:37.919Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: key-wallet/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:00:37.919Z
Learning: Applies to key-wallet/**/{wallet,account,managed_account,address_pool}/**/*.rs : Always validate network consistency: use the account's network type when creating addresses and assert that operations use the expected network to prevent mainnet/testnet mixing
Applied to files:
dash-spv/src/client/message_handler.rs
📚 Learning: 2025-12-01T08:01:18.174Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: AGENTS.md:0-0
Timestamp: 2025-12-01T08:01:18.174Z
Learning: Organize workspace with crates: `dash`, `hashes`, `internals`, `dash-network`, `dash-spv`, `key-wallet`, `rpc-*`, utilities (`fuzz`, `test-utils`), and FFI crates (`*-ffi`)
Applied to files:
dash-spv/src/client/message_handler.rs
📚 Learning: 2025-12-04T15:51:59.617Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-04T15:51:59.617Z
Learning: Applies to dash-spv/src/client/**/*.rs : Client module should provide high-level API through `DashSpvClient` and configuration via `ClientConfig`
Applied to files:
dash-spv/src/client/message_handler.rs
📚 Learning: 2025-12-04T15:51:59.617Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-04T15:51:59.617Z
Learning: Applies to dash-spv/**/*.rs : Use async/await throughout the codebase with tokio runtime for all asynchronous operations
Applied to files:
dash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/retry.rsdash-spv/src/sync/filters/headers.rs
📚 Learning: 2025-12-01T08:01:00.652Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: swift-dash-core-sdk/Examples/DashHDWalletExample/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:01:00.652Z
Learning: Applies to swift-dash-core-sdk/Examples/DashHDWalletExample/**/*.swift : Use asyncThrowingStream for blockchain synchronization with streaming API (syncProgressStream()) instead of callback-based approach when possible
Applied to files:
dash-spv/src/sync/filters/download.rs
📚 Learning: 2025-12-04T15:51:59.617Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-04T15:51:59.617Z
Learning: Applies to dash-spv/**/*.rs : Use Minimum Rust Version (MSRV) 1.89 and ensure all code compiles with `cargo check --all-features`
Applied to files:
dash-spv/src/sync/filters/retry.rs
📚 Learning: 2025-12-04T15:51:59.617Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-04T15:51:59.617Z
Learning: Applies to dash-spv/src/validation/**/*.rs : Validation module should support configurable validation modes (`ValidationMode::None`, `ValidationMode::Basic`, `ValidationMode::Full`) with header validation, ChainLock, and InstantLock verification
Applied to files:
dash-spv/src/sync/filters/retry.rs
📚 Learning: 2025-12-01T08:00:50.618Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: swift-dash-core-sdk/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:00:50.618Z
Learning: Applies to swift-dash-core-sdk/**/*.rs : Implement new FFI functions in Rust with `#[no_mangle] extern "C"` annotation in dash-spv-ffi
Applied to files:
dash-spv/src/sync/filters/retry.rsdash-spv/src/sync/filters/headers.rs
📚 Learning: 2025-12-01T07:59:58.608Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv-ffi/CLAUDE.md:0-0
Timestamp: 2025-12-01T07:59:58.608Z
Learning: Applies to dash-spv-ffi/src/**/*.rs : Add cbindgen annotations for complex types in FFI functions
Applied to files:
dash-spv/src/sync/filters/retry.rs
📚 Learning: 2025-12-01T08:00:50.618Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: swift-dash-core-sdk/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:00:50.618Z
Learning: Run `./sync-headers.sh` to copy updated headers to Swift SDK after rebuilding dash-spv-ffi
Applied to files:
dash-spv/src/sync/filters/headers.rs
📚 Learning: 2025-12-04T15:51:59.617Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-04T15:51:59.617Z
Learning: Storage should use segmented storage with headers stored in 10,000-header segments with index files, separate storage for filter headers and compact block filters
Applied to files:
dash-spv/src/sync/filters/headers.rs
📚 Learning: 2025-06-26T15:54:02.509Z
Learnt from: DCG-Claude
Repo: dashpay/rust-dashcore PR: 0
File: :0-0
Timestamp: 2025-06-26T15:54:02.509Z
Learning: The `StorageManager` trait in `dash-spv/src/storage/mod.rs` uses `&mut self` methods but is also `Send + Sync`, and implementations often use interior mutability for concurrency. This can be confusing, so explicit documentation should clarify thread-safety expectations and the rationale for the API design.
Applied to files:
dash-spv/src/sync/filters/headers.rsdash-spv/src/sync/filters/manager.rs
🧬 Code graph analysis (2)
dash-spv/src/sync/filters/download.rs (2)
dash-spv/src/client/core.rs (2)
network(166-168)storage(171-173)dash-spv/src/client/queries.rs (1)
network(48-51)
dash-spv/src/sync/filters/headers.rs (2)
dash-spv/src/client/core.rs (1)
network(166-168)dash-spv/src/client/queries.rs (1)
network(48-51)
🔇 Additional comments (21)
dash-spv/src/sync/filters/stats.rs (1)
10-13: LGTM! Simplification aligns with PR goals.The removal of the
flow_control_enabledboolean flag from the return type is consistent with making flow control the default and only syncing method. The renamed method clearly describes its purpose.dash-spv/src/client/message_handler.rs (2)
9-25: Stats removal and type imports look consistent with new designImporting only
MempoolStateandSpvEventand dropping anySpvStatswiring fromMessageHandler(fields and ctor params) cleanly decouples this handler from global stats, which matches the PR goal of centralizing sync/flow-control in the sequentialSyncManager. No stray stats usages remain in this file, so the change looks coherent.
155-184: CFilter forwarding path matches flow-control-only sync architectureFor
NetworkMessage::CFilteryou now:
- Forward a cloned message to
sync_manager.handle_message(...)for flow-controlled filter sync, and- Independently enqueue a
ProcessCompactFiltertask to the block processor for wallet matching and event emission, plus a lightweight debug log later.This separation keeps SyncManager responsible for sync state while the client handles wallet/mempool concerns, and avoids extra cloning of large structures beyond the single explicit clone. The behaviour is aligned with the “flow-control only” design and looks sound.
Also applies to: 336-338
dash-spv/src/sync/filters/requests.rs (2)
133-160: LGTM!The documentation update correctly reflects that queue-based processing is now the default behavior. The method logic is sound and implements proper flow control with the initial batch limit.
215-239: LGTM!The method now unconditionally processes queued requests based on available slots, which aligns with the PR's goal of making flow-controlled syncing the default path. The implementation correctly manages the queue and active request tracking.
dash-spv/src/sync/filters/retry.rs (4)
159-188: LGTM!The simplified condition correctly gates timeout checking on the sync state without redundant flow-control flag checks. This aligns with the unified synchronization approach.
191-233: LGTM!The extracted helper method improves code organization by isolating timeout handling logic. The retry mechanism with configurable max attempts and priority re-queuing is well-implemented.
236-262: LGTM!The unified timeout checking logic is cleaner without flow-control branching. The method correctly identifies timed-out requests and delegates to the dedicated timeout handler.
264-339: LGTM!The timeout handler correctly implements retry logic with proper validation. The height range check at line 287 prevents retrying requests for blocks below the checkpoint base, which is a good defensive practice.
dash-spv/src/sync/filters/download.rs (3)
73-110: LGTM!The refactored queue-based approach is cleaner and more maintainable. Key improvements:
- State clearing (line 87) prevents issues from previous sync attempts
- Centralized queue building and processing
- Clear logging of queue state for observability
The comment at line 104 correctly notes that completion is tracked by a monitoring loop, which is appropriate for async processing.
113-150: LGTM!The filter tracking logic is well-implemented:
- Efficiently checks for completed batches
- Proper cleanup of completed requests
- Periodic logging (line 139) provides visibility without overwhelming logs
396-416: LGTM!The batch sending logic correctly manages concurrency by filling available slots from the queue. This is consistent with the centralized flow control pattern throughout the refactoring.
dash-spv/src/sync/filters/headers.rs (6)
144-155: LGTM!The simplified message handler delegates to the unified
handle_filter_headersmethod. The naming is clearer and reflects that this is now the only CFHeaders handling path.
375-460: LGTM!The renamed method correctly reflects the unified synchronization approach. Key improvements:
- Line 396: Log message simplified to remove flow control terminology
- Lines 441-451: Clean queue setup and processing
- Line 454: Updated log message reflects default behavior
The queue-based CFHeaders sync is consistent with the filter sync pattern.
463-528: LGTM!The queue building logic is well-structured:
- Proper state clearing (lines 470-473) ensures clean start
- Batch size of FILTER_BATCH_SIZE provides good parallelism
- Error handling for missing headers prevents invalid requests
- Good logging for observability
530-550: LGTM!The queue processing follows the same pattern as filter requests, ensuring consistency across the codebase. The initial batch sending respects the concurrency limit.
579-652: LGTM!The unified handler consolidates the CFHeaders processing logic effectively:
- Empty response handling (lines 587-592) correctly ends sync
- Out-of-order batch buffering (lines 617-631) handles network unpredictability
- Completion detection (line 644) with proper state cleanup
The sequential processing with buffering is a robust approach for handling parallel requests.
785-791: LGTM!The renamed method clearly indicates its purpose without flow-control terminology. It properly clears all CFHeaders-related state for clean restarts.
dash-spv/src/sync/filters/manager.rs (3)
93-125: LGTM!The constructor properly initializes the refactored struct:
- CFHeaders configuration (lines 115-121) correctly reads from
ClientConfig- Phantom data markers (lines 122-123) are properly initialized
- All queue and tracking fields are initialized to empty/default states
257-268: LGTM!The state clearing method is correctly updated to work with the new struct fields. The comment at line 265 helpfully explains why
received_filter_heightsis preserved.
282-293: LGTM!The reset method comprehensively clears all pending request state while correctly excluding the removed flow-control fields. This provides a clean slate for retry scenarios.
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⚠️ Outside diff range comments (1)
dash-spv/src/sync/filters/manager.rs (1)
92-93: Incorrect doc comment on constructor.The doc comment "Verify that the received compact filter hashes to the expected filter header" describes verification logic, not the
new()constructor. This appears to be a leftover from removed code.- /// Verify that the received compact filter hashes to the expected filter header + /// Creates a new FilterSyncManager with the given configuration. pub fn new(config: &ClientConfig, received_filter_heights: SharedFilterHeights) -> Self {
🧹 Nitpick comments (2)
dash-spv/src/sync/filters/stats.rs (1)
20-26: Consider handling lock contention more explicitly.Returning
0on lock contention silently masks the failure case. Callers may misinterpret this as "no filters received" rather than "couldn't acquire lock."Consider using
Result<u32, TryLockError>or logging contention:pub fn get_received_filter_count(&self) -> u32 { match self.received_filter_heights.try_lock() { Ok(heights) => heights.len() as u32, - Err(_) => 0, + Err(_) => { + tracing::trace!("Could not acquire lock for received_filter_heights count"); + 0 + } } }dash-spv/src/sync/filters/headers.rs (1)
157-332: Extract common setup logic from filter header synchronization methods.
start_sync_headersandstart_sync_filter_headersshare substantial duplicated initialization code:
- Both check
syncing_filter_headersflag and returnSyncInProgresserror- Both verify peer supports
COMPACT_FILTERSservice- Both retrieve
current_filter_heightandheader_tip_heightfrom storage- Both compute
next_heightusing identical checkpoint logic (lines ~200-210 vs ~410-415)- Both validate
next_height > header_tip_height- Both set up sync state (
syncing_filter_headers,current_sync_height,last_sync_progress)The methods intentionally diverge only after setup:
start_sync_headersperforms direct batch processing, whilestart_sync_filter_headersuses queue-based flow control withbuild_cfheader_request_queue.Consider extracting a helper method for the shared setup phase to reduce duplication and improve maintainability.
📜 Review details
Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro
📒 Files selected for processing (21)
dash-spv/src/client/config.rs(0 hunks)dash-spv/src/client/config_test.rs(0 hunks)dash-spv/src/client/filter_sync.rs(0 hunks)dash-spv/src/client/message_handler.rs(1 hunks)dash-spv/src/client/mod.rs(0 hunks)dash-spv/src/client/sync_coordinator.rs(0 hunks)dash-spv/src/network/tests.rs(0 hunks)dash-spv/src/sync/filters/download.rs(3 hunks)dash-spv/src/sync/filters/gaps.rs(0 hunks)dash-spv/src/sync/filters/headers.rs(9 hunks)dash-spv/src/sync/filters/manager.rs(3 hunks)dash-spv/src/sync/filters/matching.rs(0 hunks)dash-spv/src/sync/filters/mod.rs(0 hunks)dash-spv/src/sync/filters/requests.rs(1 hunks)dash-spv/src/sync/filters/retry.rs(1 hunks)dash-spv/src/sync/filters/stats.rs(1 hunks)dash-spv/src/sync/message_handlers.rs(2 hunks)dash-spv/src/sync/phase_execution.rs(4 hunks)dash-spv/tests/cfheader_gap_test.rs(0 hunks)dash-spv/tests/edge_case_filter_sync_test.rs(0 hunks)dash-spv/tests/simple_gap_test.rs(0 hunks)
💤 Files with no reviewable changes (12)
- dash-spv/src/client/config_test.rs
- dash-spv/src/client/filter_sync.rs
- dash-spv/src/client/sync_coordinator.rs
- dash-spv/tests/edge_case_filter_sync_test.rs
- dash-spv/src/sync/filters/matching.rs
- dash-spv/tests/cfheader_gap_test.rs
- dash-spv/src/sync/filters/mod.rs
- dash-spv/tests/simple_gap_test.rs
- dash-spv/src/client/config.rs
- dash-spv/src/network/tests.rs
- dash-spv/src/client/mod.rs
- dash-spv/src/sync/filters/gaps.rs
🚧 Files skipped from review as they are similar to previous changes (1)
- dash-spv/src/sync/filters/requests.rs
🧰 Additional context used
📓 Path-based instructions (4)
**/*.rs
📄 CodeRabbit inference engine (CLAUDE.md)
**/*.rs: Never hardcode network parameters, addresses, or keys in Rust code
Use proper error types with thiserror crate and propagate errors appropriately in Rust code
Use tokio runtime for async operations in Rust code
Use conditional compilation with feature flags for optional features
Write unit tests for new functionality in Rust
Format Rust code with cargo fmt before committing
Ensure clippy passes with all warnings as errors on all Rust code
**/*.rs: Each crate keeps sources insrc/; unit tests live alongside code with#[cfg(test)]
Maintain MSRV of 1.89 for Rust code
Format Rust code withrustfmt(seerustfmt.toml); runcargo fmt --allbefore commits
Lint Rust code withclippy; avoidunwrap()/expect()in library code; use error types (e.g.,thiserror)
Usesnake_casefor function and variable names in Rust
UseUpperCamelCasefor types and traits in Rust
UseSCREAMING_SNAKE_CASEfor constants in Rust
Follow mixed editions (2021/2024) and crate-specific idioms; prefer async viatokiowhere applicable
Unit tests should be placed near code with descriptive names (e.g.,test_parse_address_mainnet)
Use#[ignore]for network-dependent or long-running tests; run with-- --ignoredflag
Never commit secrets or real keys; avoid logging sensitive data in Rust code
Keep test vectors deterministic in Rust test code
Files:
dash-spv/src/client/message_handler.rsdash-spv/src/sync/filters/headers.rsdash-spv/src/sync/message_handlers.rsdash-spv/src/sync/phase_execution.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/manager.rsdash-spv/src/sync/filters/stats.rsdash-spv/src/sync/filters/retry.rs
dash-spv/**/*.rs
📄 CodeRabbit inference engine (dash-spv/CLAUDE.md)
dash-spv/**/*.rs: Use trait-based abstractions for core components likeNetworkManagerandStorageManagerto enable swappable implementations
Use async/await throughout the codebase with tokio runtime for all asynchronous operations
Use Minimum Rust Version (MSRV) 1.89 and ensure all code compiles withcargo check --all-features
Files:
dash-spv/src/client/message_handler.rsdash-spv/src/sync/filters/headers.rsdash-spv/src/sync/message_handlers.rsdash-spv/src/sync/phase_execution.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/manager.rsdash-spv/src/sync/filters/stats.rsdash-spv/src/sync/filters/retry.rs
dash-spv/src/client/**/*.rs
📄 CodeRabbit inference engine (dash-spv/CLAUDE.md)
Client module should provide high-level API through
DashSpvClientand configuration viaClientConfig
Files:
dash-spv/src/client/message_handler.rs
dash-spv/src/sync/**/*.rs
📄 CodeRabbit inference engine (dash-spv/CLAUDE.md)
Synchronization should use
SyncManagerfor phase-based coordination: Phase 1 (Headers), Phase 2 (Masternode List), Phase 3 (Filter Headers), Phase 4 (Filters), Phase 5 (Blocks)
Files:
dash-spv/src/sync/filters/headers.rsdash-spv/src/sync/message_handlers.rsdash-spv/src/sync/phase_execution.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/manager.rsdash-spv/src/sync/filters/stats.rsdash-spv/src/sync/filters/retry.rs
🧠 Learnings (21)
📚 Learning: 2025-12-04T15:51:59.632Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-04T15:51:59.632Z
Learning: Applies to dash-spv/**/*.rs : Use trait-based abstractions for core components like `NetworkManager` and `StorageManager` to enable swappable implementations
Applied to files:
dash-spv/src/client/message_handler.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/manager.rsdash-spv/src/sync/filters/stats.rsdash-spv/src/sync/filters/retry.rs
📚 Learning: 2025-12-04T15:51:59.632Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-04T15:51:59.632Z
Learning: Applies to dash-spv/src/network/**/*.rs : Network module should handle TCP connections, handshake management, message routing, and peer management following Dash protocol implementation
Applied to files:
dash-spv/src/client/message_handler.rs
📚 Learning: 2025-06-26T16:01:37.609Z
Learnt from: DCG-Claude
Repo: dashpay/rust-dashcore PR: 0
File: :0-0
Timestamp: 2025-06-26T16:01:37.609Z
Learning: The mempool tracking infrastructure (UnconfirmedTransaction, MempoolState, configuration, and mempool_filter.rs) is fully implemented and integrated in the Dash SPV client as of this PR, including client logic, FFI APIs, and tests.
Applied to files:
dash-spv/src/client/message_handler.rsdash-spv/src/sync/filters/headers.rsdash-spv/src/sync/message_handlers.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/manager.rsdash-spv/src/sync/filters/stats.rs
📚 Learning: 2025-12-04T15:51:59.632Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-04T15:51:59.632Z
Learning: Applies to dash-spv/src/storage/**/*.rs : Storage module should provide abstraction via `StorageManager` trait with concrete implementations for `MemoryStorageManager` and `DiskStorageManager`
Applied to files:
dash-spv/src/client/message_handler.rsdash-spv/src/sync/filters/download.rs
📚 Learning: 2025-12-04T15:51:59.632Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-04T15:51:59.632Z
Learning: Applies to dash-spv/src/sync/**/*.rs : Synchronization should use `SyncManager` for phase-based coordination: Phase 1 (Headers), Phase 2 (Masternode List), Phase 3 (Filter Headers), Phase 4 (Filters), Phase 5 (Blocks)
Applied to files:
dash-spv/src/client/message_handler.rsdash-spv/src/sync/filters/headers.rsdash-spv/src/sync/message_handlers.rsdash-spv/src/sync/phase_execution.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/manager.rsdash-spv/src/sync/filters/stats.rsdash-spv/src/sync/filters/retry.rs
📚 Learning: 2025-12-04T15:51:59.632Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-04T15:51:59.632Z
Learning: Applies to dash-spv/src/error.rs : Maintain domain-specific error types in `error.rs` with variants for `NetworkError`, `StorageError`, `SyncError`, `ValidationError`, and `SpvError` (top-level wrapper)
Applied to files:
dash-spv/src/client/message_handler.rsdash-spv/src/sync/filters/download.rs
📚 Learning: 2025-06-26T16:02:42.390Z
Learnt from: DCG-Claude
Repo: dashpay/rust-dashcore PR: 0
File: :0-0
Timestamp: 2025-06-26T16:02:42.390Z
Learning: Passing exclusive mutable references to network and storage managers into the sync manager in async Rust can lead to borrow checker issues or runtime contention if concurrent access is needed elsewhere. It's advisable to document this architectural tradeoff and consider refactoring to interior mutability or message passing for shared access as the codebase evolves.
Applied to files:
dash-spv/src/client/message_handler.rsdash-spv/src/sync/filters/headers.rsdash-spv/src/sync/filters/stats.rs
📚 Learning: 2025-12-04T15:51:59.632Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-04T15:51:59.632Z
Learning: Applies to dash-spv/src/wallet/**/*.rs : Wallet module should provide UTXO tracking via `Utxo` struct, balance calculation with confirmation states, and transaction processing via `TransactionProcessor`
Applied to files:
dash-spv/src/client/message_handler.rs
📚 Learning: 2025-12-01T08:00:37.919Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: key-wallet/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:00:37.919Z
Learning: Applies to key-wallet/**/{wallet,account,managed_account,address_pool}/**/*.rs : Always validate network consistency: use the account's network type when creating addresses and assert that operations use the expected network to prevent mainnet/testnet mixing
Applied to files:
dash-spv/src/client/message_handler.rs
📚 Learning: 2025-12-01T08:01:18.174Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: AGENTS.md:0-0
Timestamp: 2025-12-01T08:01:18.174Z
Learning: Organize workspace with crates: `dash`, `hashes`, `internals`, `dash-network`, `dash-spv`, `key-wallet`, `rpc-*`, utilities (`fuzz`, `test-utils`), and FFI crates (`*-ffi`)
Applied to files:
dash-spv/src/client/message_handler.rs
📚 Learning: 2025-12-04T15:51:59.632Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-04T15:51:59.632Z
Learning: Applies to dash-spv/src/client/**/*.rs : Client module should provide high-level API through `DashSpvClient` and configuration via `ClientConfig`
Applied to files:
dash-spv/src/client/message_handler.rsdash-spv/src/sync/filters/manager.rsdash-spv/src/sync/filters/stats.rs
📚 Learning: 2025-12-01T08:00:50.618Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: swift-dash-core-sdk/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:00:50.618Z
Learning: Run `./sync-headers.sh` to copy updated headers to Swift SDK after rebuilding dash-spv-ffi
Applied to files:
dash-spv/src/sync/filters/headers.rs
📚 Learning: 2025-12-04T15:51:59.632Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-04T15:51:59.632Z
Learning: Applies to dash-spv/**/*.rs : Use async/await throughout the codebase with tokio runtime for all asynchronous operations
Applied to files:
dash-spv/src/sync/filters/headers.rsdash-spv/src/sync/phase_execution.rsdash-spv/src/sync/filters/download.rsdash-spv/src/sync/filters/stats.rsdash-spv/src/sync/filters/retry.rs
📚 Learning: 2025-12-04T15:51:59.632Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-04T15:51:59.632Z
Learning: Storage should use segmented storage with headers stored in 10,000-header segments with index files, separate storage for filter headers and compact block filters
Applied to files:
dash-spv/src/sync/filters/headers.rs
📚 Learning: 2025-06-26T15:54:02.509Z
Learnt from: DCG-Claude
Repo: dashpay/rust-dashcore PR: 0
File: :0-0
Timestamp: 2025-06-26T15:54:02.509Z
Learning: The `StorageManager` trait in `dash-spv/src/storage/mod.rs` uses `&mut self` methods but is also `Send + Sync`, and implementations often use interior mutability for concurrency. This can be confusing, so explicit documentation should clarify thread-safety expectations and the rationale for the API design.
Applied to files:
dash-spv/src/sync/filters/headers.rsdash-spv/src/sync/filters/manager.rs
📚 Learning: 2025-12-04T15:51:59.632Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-04T15:51:59.632Z
Learning: Implement sequential sync with each phase completing before the next begins to ensure consistency and simplify error recovery
Applied to files:
dash-spv/src/sync/phase_execution.rs
📚 Learning: 2025-12-01T08:01:00.652Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: swift-dash-core-sdk/Examples/DashHDWalletExample/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:01:00.652Z
Learning: Applies to swift-dash-core-sdk/Examples/DashHDWalletExample/**/*.swift : Use asyncThrowingStream for blockchain synchronization with streaming API (syncProgressStream()) instead of callback-based approach when possible
Applied to files:
dash-spv/src/sync/filters/download.rs
📚 Learning: 2025-12-04T15:51:59.632Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-04T15:51:59.632Z
Learning: Applies to dash-spv/**/*.rs : Use Minimum Rust Version (MSRV) 1.89 and ensure all code compiles with `cargo check --all-features`
Applied to files:
dash-spv/src/sync/filters/stats.rsdash-spv/src/sync/filters/retry.rs
📚 Learning: 2025-12-01T08:00:50.618Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: swift-dash-core-sdk/CLAUDE.md:0-0
Timestamp: 2025-12-01T08:00:50.618Z
Learning: Applies to swift-dash-core-sdk/**/*.rs : Implement new FFI functions in Rust with `#[no_mangle] extern "C"` annotation in dash-spv-ffi
Applied to files:
dash-spv/src/sync/filters/stats.rsdash-spv/src/sync/filters/retry.rs
📚 Learning: 2025-12-04T15:51:59.632Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv/CLAUDE.md:0-0
Timestamp: 2025-12-04T15:51:59.632Z
Learning: Applies to dash-spv/src/validation/**/*.rs : Validation module should support configurable validation modes (`ValidationMode::None`, `ValidationMode::Basic`, `ValidationMode::Full`) with header validation, ChainLock, and InstantLock verification
Applied to files:
dash-spv/src/sync/filters/retry.rs
📚 Learning: 2025-12-01T07:59:58.608Z
Learnt from: CR
Repo: dashpay/rust-dashcore PR: 0
File: dash-spv-ffi/CLAUDE.md:0-0
Timestamp: 2025-12-01T07:59:58.608Z
Learning: Applies to dash-spv-ffi/src/**/*.rs : Add cbindgen annotations for complex types in FFI functions
Applied to files:
dash-spv/src/sync/filters/retry.rs
🔇 Additional comments (19)
dash-spv/src/sync/message_handlers.rs (2)
626-645: LGTM - Stats recording for filter height tracking.The two-phase locking approach correctly avoids holding both locks simultaneously. The stats write lock is released before acquiring the heights mutex, preventing potential deadlock scenarios.
Note: Height is recorded both here (for stats/diagnostics) and via
mark_filter_receivedat line 663 (for sync tracking). This appears intentional sincemark_filter_receivedhandles batch completion detection while this block handles stats updates. Based on the past review comment, this was added to compensate for removed stats propagation through the client MessageHandler.
720-720: LGTM - Comment cleanup.Terminology update aligns with the PR objective of removing flow-control specific language.
dash-spv/src/sync/phase_execution.rs (4)
115-130: LGTM - Unified filter header sync entry point.The conditional flow-control branching has been replaced with a single
start_sync_filter_headerscall. The immediate transition to next phase when sync isn't started (lines 118-129) ensures proper progression when no peers support filters.
169-171: LGTM - Simplified filter sync call.The
sync_filtersmethod now operates without flow-control branching, maintaining the same parameters for start height and count.
313-317: LGTM - Unconditional CFHeader timeout check.The flow-control gating has been removed, and
check_cfheader_request_timeoutsis now always called during the DownloadingCFHeaders phase. This aligns with the unified sync approach.
465-469: LGTM - Consistent timeout handling in recovery path.The recovery path now unconditionally uses
check_cfheader_request_timeouts, matching the main timeout check logic.dash-spv/src/client/message_handler.rs (1)
9-9: LGTM - Removed unused import.
SpvStatsis correctly removed from the import list since stats tracking has been consolidated into theSyncManagerlevel, as evidenced by the changes inmessage_handlers.rswhere filter height recording now happens directly throughself.stats.dash-spv/src/sync/filters/retry.rs (1)
159-167: LGTM - Simplified timeout check gating.The guard condition now solely depends on
syncing_filter_headersstate, removing the previous flow-control flag dependency. This aligns with the unified sync approach where CFHeader timeout handling is always active during filter header synchronization.dash-spv/src/sync/filters/download.rs (2)
7-12: LGTM - Updated documentation.The module documentation correctly reflects the queue-based filter request management approach that replaces the previous flow-control branching.
73-110: LGTM - Unified sync_filters entry point.The method properly:
- Guards against concurrent sync attempts (line 80-82)
- Clears stale state before starting (line 87)
- Builds the request queue (line 90)
- Initiates queue processing (line 93)
- Logs queue state for diagnostics (lines 97-101)
The comment at lines 103-104 correctly notes that
syncing_filtersshould remain true during download and will be cleared on completion or failure.dash-spv/src/sync/filters/stats.rs (1)
10-18: LGTM! Clean API simplification.The renamed method and reduced return type appropriately reflect the removal of flow-control toggles. The method now returns just the essential state (pending/active counts) without the now-redundant
flow_control_enabledflag.dash-spv/src/sync/filters/headers.rs (4)
154-155: LGTM! Method call correctly updated.The renamed method call aligns with the unified flow-control terminology refactor.
579-652: LGTM! Well-structured sequential processing flow.The buffered approach correctly handles:
- Empty responses signaling sync completion
- Out-of-order batch buffering with in-sequence processing
- Active request tracking removal on receipt
- Proper state cleanup on completion
The flow maintains data integrity by processing CFHeaders batches sequentially regardless of arrival order.
785-791: LGTM! State cleanup method appropriately renamed.The method correctly clears all CFHeaders sync state. The renaming from
clear_cfheader_flow_control_statetoclear_filter_header_sync_statealigns with the PR's objective of removing flow-control terminology.
530-550: LGTM! Queue processing correctly rate-limits concurrent requests.The method properly respects
max_concurrent_cfheader_requestsand uses FIFO ordering viaVecDeque::pop_front.dash-spv/src/sync/filters/manager.rs (4)
256-268: LGTM! State clearing method properly updated.The method correctly clears the remaining filter sync state. The note about preserving
received_filter_heightsis appropriate as those represent actually received data.
282-293: LGTM! Reset method clears all relevant request state.The method properly resets all sync flags and clears request tracking collections.
111-124: LGTM! CFHeaders fields properly initialized from config.The constructor correctly initializes the new CFHeaders-centric fields using values from
ClientConfig. All referenced config fields are properly defined:max_cfheaders_retries(u32),max_concurrent_cfheaders_requests_parallel(usize), andcfheaders_request_timeout_secs(u64). The timeout conversion from seconds toDurationis appropriate.
41-44: The generic parametersSandNserve a valid architectural purpose.The struct uses these parameters in method signatures (
is_filter_sync_available(&self, network: &N)andprocess_filter_headers(&self, storage: &S, ...)), enabling compile-time monomorphization and type-safe trait-based abstractions. ThePhantomDatafields are necessary and correctly placed to satisfy Rust's generic parameter usage requirements. This design is intentional and idiomatic; no refactoring is needed.
This fixes an issue introduced in #211 where the `receiver_filter_heights` lock isn't released after inserting the received height, and then the same task tries to acquire the lock again just a bit below in `mark_filter_received` -> deadlock. So, #211 should have not introduced the filter height updates here since they already exist in `mark_filter_received`. Yet the stats updates introduced in the same place are legit.
This fixes an issue introduced in #211 where the `receiver_filter_heights` lock isn't released after inserting the received height, and then the same task tries to acquire the lock again just a bit below in `mark_filter_received` -> deadlock. So, #211 should have not introduced the filter height updates here since they already exist in `mark_filter_received`. Yet the stats updates introduced in the same place are legit.
This fixes an issue introduced in #211 where the `receiver_filter_heights` lock isn't released after inserting the received height, and then the same task tries to acquire the lock again just a bit below in `mark_filter_received` -> deadlock. So, #211 should have not introduced the filter height updates here since they already exist in `mark_filter_received`. Yet the stats updates introduced in the same place are legit.
This fixes an issue introduced in #211 where the `receiver_filter_heights` lock isn't released after inserting the received height, and then the same task tries to acquire the lock again just a bit below in `mark_filter_received` -> deadlock. So, #211 should have not introduced the filter height updates here since they already exist in `mark_filter_received`. Yet the stats updates introduced in the same place are legit.
This fixes an issue introduced in #211 where the `receiver_filter_heights` lock isn't released after inserting the received height, and then the same task tries to acquire the lock again just a bit below in `mark_filter_received` -> deadlock. So, #211 should have not introduced the filter height updates here since they already exist in `mark_filter_received`. Yet the stats updates introduced in the same place are legit.
Drop
enable_filter_flow_controlandenable_cfheaders_flow_control, makes "flow control syncing" the only way to sync in code and drops all the relevant code and configs which is/are not longer needed.I think we should focus on getting one way of syncing done flawless and it anyway seems just like some early stage version which were kept behind options for some reason.
Based on:
Summary by CodeRabbit
Refactor
Tests
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