* Move import queue out of `sc-network` Add supplementary asynchronous API for the import queue which means it can be run as an independent task and communicated with through the `ImportQueueService`. This commit removes removes block and justification imports from `sc-network` and provides `ChainSync` with a handle to import queue so it can import blocks and justifications. Polling of the import queue is moved complete out of `sc-network` and `sc_consensus::Link` is implemented for `ChainSyncInterfaceHandled` so the import queue can still influence the syncing process. * Move stuff to SyncingEngine * Move `ChainSync` instanation to `SyncingEngine` Some of the tests have to be rewritten * Move peer hashmap to `SyncingEngine` * Let `SyncingEngine` to implement `ChainSyncInterface` * Introduce `SyncStatusProvider` * Move `sync_peer_(connected|disconnected)` to `SyncingEngine` * Implement `SyncEventStream` Remove `SyncConnected`/`SyncDisconnected` events from `NetworkEvenStream` and provide those events through `ChainSyncInterface` instead. Modify BEEFY/GRANDPA/transactions protocol and `NetworkGossip` to take `SyncEventStream` object which they listen to for incoming sync peer events. * Introduce `ChainSyncInterface` This interface provides a set of miscellaneous functions that other subsystems can use to query, for example, the syncing status. * Move event stream polling to `SyncingEngine` Subscribe to `NetworkStreamEvent` and poll the incoming notifications and substream events from `SyncingEngine`. The code needs refactoring. * Make `SyncingEngine` into an asynchronous runner This commits removes the last hard dependency of syncing from `sc-network` meaning the protocol now lives completely outside of `sc-network`, ignoring the hardcoded peerset entry which will be addressed in the future. Code needs a lot of refactoring. * Fix warnings * Code refactoring * Use `SyncingService` for BEEFY * Use `SyncingService` for GRANDPA * Remove call delegation from `NetworkService` * Remove `ChainSyncService` * Remove `ChainSync` service tests They were written for the sole purpose of verifying that `NetworWorker` continues to function while the calls are being dispatched to `ChainSync`. * Refactor code * Refactor code * Update client/finality-grandpa/src/communication/tests.rs Co-authored-by: Anton <anton.kalyaev@gmail.com> * Fix warnings * Apply review comments * Fix docs * Fix test * cargo-fmt * Update client/network/sync/src/engine.rs Co-authored-by: Anton <anton.kalyaev@gmail.com> * Update client/network/sync/src/engine.rs Co-authored-by: Anton <anton.kalyaev@gmail.com> * Add missing docs * Refactor code --------- Co-authored-by: Anton <anton.kalyaev@gmail.com>
Substrate ·

Substrate is a next-generation framework for blockchain innovation 🚀.
Getting Started
Head to docs.substrate.io and follow the installation instructions. Then try out one of the tutorials.
Community & Support
Join the highly active and supportive community on the Substrate Stack Exchange to ask questions about use and problems you run into using this software. Please do report bugs and issues here for anything you suspect requires action in the source.
Contributions & Code of Conduct
Please follow the contributions guidelines as outlined in docs/CONTRIBUTING.adoc.
In all communications and contributions, this project follows the Contributor Covenant Code of Conduct.
Security
The security policy and procedures can be found in docs/SECURITY.md.
License
- Substrate Primitives (
sp-*), Frame (frame-*) and the pallets (pallets-*), binaries (/bin) and all other utilities are licensed under Apache 2.0. - Substrate Client (
/client/*/sc-*) is licensed under GPL v3.0 with a classpath linking exception.
The reason for the split-licensing is to ensure that for the vast majority of teams using Substrate to create feature-chains, then all changes can be made entirely in Apache2-licensed code, allowing teams full freedom over what and how they release and giving licensing clarity to commercial teams.
In the interests of the community, we require any deeper improvements made to Substrate's core logic (e.g. Substrate's internal consensus, crypto or database code) to be contributed back so everyone can benefit.
