[litep2p](https://github.com/altonen/litep2p) is a libp2p-compatible P2P
networking library. It supports all of the features of `rust-libp2p`
that are currently being utilized by Polkadot SDK.
Compared to `rust-libp2p`, `litep2p` has a quite different architecture
which is why the new `litep2p` network backend is only able to use a
little of the existing code in `sc-network`. The design has been mainly
influenced by how we'd wish to structure our networking-related code in
Polkadot SDK: independent higher-levels protocols directly communicating
with the network over links that support bidirectional backpressure. A
good example would be `NotificationHandle`/`RequestResponseHandle`
abstractions which allow, e.g., `SyncingEngine` to directly communicate
with peers to announce/request blocks.
I've tried running `polkadot --network-backend litep2p` with a few
different peer configurations and there is a noticeable reduction in
networking CPU usage. For high load (`--out-peers 200`), networking CPU
usage goes down from ~110% to ~30% (80 pp) and for normal load
(`--out-peers 40`), the usage goes down from ~55% to ~18% (37 pp).
These should not be taken as final numbers because:
a) there are still some low-hanging optimization fruits, such as
enabling [receive window
auto-tuning](https://github.com/libp2p/rust-yamux/pull/176), integrating
`Peerset` more closely with `litep2p` or improving memory usage of the
WebSocket transport
b) fixing bugs/instabilities that incorrectly cause `litep2p` to do less
work will increase the networking CPU usage
c) verification in a more diverse set of tests/conditions is needed
Nevertheless, these numbers should give an early estimate for CPU usage
of the new networking backend.
This PR consists of three separate changes:
* introduce a generic `PeerId` (wrapper around `Multihash`) so that we
don't have use `NetworkService::PeerId` in every part of the code that
uses a `PeerId`
* introduce `NetworkBackend` trait, implement it for the libp2p network
stack and make Polkadot SDK generic over `NetworkBackend`
* implement `NetworkBackend` for litep2p
The new library should be considered experimental which is why
`rust-libp2p` will remain as the default option for the time being. This
PR currently depends on the master branch of `litep2p` but I'll cut a
new release for the library once all review comments have been
addresses.
---------
Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>
Co-authored-by: Dmitry Markin <dmitry@markin.tech>
Co-authored-by: Alexandru Vasile <60601340+lexnv@users.noreply.github.com>
Co-authored-by: Alexandru Vasile <alexandru.vasile@parity.io>
Working towards migrating the `parity-bridges-common` repo inside
`polkadot-sdk`. This PR upgrades some dependencies in order to align
them with the versions used in `parity-bridges-common`
Related to
https://github.com/paritytech/parity-bridges-common/issues/2538
Changes (partial https://github.com/paritytech/polkadot-sdk/issues/994):
- Set log to `0.4.20` everywhere
- Lift `log` to the workspace
Starting with a simpler one after seeing
https://github.com/paritytech/polkadot-sdk/pull/2065 from @jsdw.
This sets the `default-features` to `false` in the root and then
overwrites that in each create to its original value. This is necessary
since otherwise the `default` features are additive and its impossible
to disable them in the crate again once they are enabled in the
workspace.
I am using a tool to do this, so its mostly a test to see that it works
as expected.
---------
Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
We currently use a bit of a hack in `.cargo/config` to make sure that
clippy isn't too annoying by specifying the list of lints.
There is now a stable way to define lints for a workspace. The only down
side is that every crate seems to have to opt into this so there's a
*few* files modified in this PR.
Dependencies:
- [x] PR that upgrades CI to use rust 1.74 is merged.
---------
Co-authored-by: joe petrowski <25483142+joepetrowski@users.noreply.github.com>
Co-authored-by: Branislav Kontur <bkontur@gmail.com>
Co-authored-by: Liam Aharon <liam.aharon@hotmail.com>
This commit introduces a new concept called `NotificationService` which
allows Polkadot protocols to communicate with the underlying
notification protocol implementation directly, without routing events
through `NetworkWorker`. This implies that each protocol has its own
service which it uses to communicate with remote peers and that each
`NotificationService` is unique with respect to the underlying
notification protocol, meaning `NotificationService` for the transaction
protocol can only be used to send and receive transaction-related
notifications.
The `NotificationService` concept introduces two additional benefits:
* allow protocols to start using custom handshakes
* allow protocols to accept/reject inbound peers
Previously the validation of inbound connections was solely the
responsibility of `ProtocolController`. This caused issues with light
peers and `SyncingEngine` as `ProtocolController` would accept more
peers than `SyncingEngine` could accept which caused peers to have
differing views of their own states. `SyncingEngine` would reject excess
peers but these rejections were not properly communicated to those peers
causing them to assume that they were accepted.
With `NotificationService`, the local handshake is not sent to remote
peer if peer is rejected which allows it to detect that it was rejected.
This commit also deprecates the use of `NetworkEventStream` for all
notification-related events and going forward only DHT events are
provided through `NetworkEventStream`. If protocols wish to follow each
other's events, they must introduce additional abtractions, as is done
for GRANDPA and transactions protocols by following the syncing protocol
through `SyncEventStream`.
Fixes https://github.com/paritytech/polkadot-sdk/issues/512
Fixes https://github.com/paritytech/polkadot-sdk/issues/514
Fixes https://github.com/paritytech/polkadot-sdk/issues/515
Fixes https://github.com/paritytech/polkadot-sdk/issues/554
Fixes https://github.com/paritytech/polkadot-sdk/issues/556
---
These changes are transferred from
https://github.com/paritytech/substrate/pull/14197 but there are no
functional changes compared to that PR
---------
Co-authored-by: Dmitry Markin <dmitry@markin.tech>
Co-authored-by: Alexandru Vasile <60601340+lexnv@users.noreply.github.com>
This PR moves syncing-related code from `sc-network-common` to
`sc-network-sync`.
Unfortunately, some parts are tightly integrated with networking, so
they were left in `sc-network-common` for now:
1. `SyncMode` in `common/src/sync.rs` (used in `NetworkConfiguration`).
2. `BlockAnnouncesHandshake`, `BlockRequest`, `BlockResponse`, etc. in
`common/src/sync/message.rs` (used in `src/protocol.rs` and
`src/protocol/message.rs`).
More substantial refactoring is needed to decouple syncing and
networking completely, including getting rid of the hardcoded sync
protocol.
## Release notes
Move syncing-related code from `sc-network-common` to `sc-network-sync`.
Delete `ChainSync` trait as it's never used (the only implementation is
accessed directly from `SyncingEngine` and exposes a lot of public
methods that are not part of the trait). Some new trait(s) for syncing
will likely be introduced as part of Sync 2.0 refactoring to represent
syncing strategies.
* update libp2p to 0.52.0
* proto name now must implement `AsRef<str>`
* update libp2p version everywhere
* ToSwarm, FromBehaviour, ToBehaviour
also LocalProtocolsChange and RemoteProtocolsChange
* new NetworkBehaviour invariants
* replace `Vec<u8>` with `StreamProtocol`
* rename ConnectionHandlerEvent::Custom to NotifyBehaviour
* remove DialError & ListenError invariants
also fix pending_events
* use connection_limits::Behaviour
See https://github.com/libp2p/rust-libp2p/pull/3885
* impl `void::Void` for `BehaviourOut`
also use `Behaviour::with_codec`
* KademliaHandler no longer public
* fix StreamProtocol construction
* update libp2p-identify to 0.2.0
* remove non-existing methods from PollParameters
rename ConnectionHandlerUpgrErr to StreamUpgradeError
* `P2p` now contains `PeerId`, not `Multihash`
* use multihash-codetable crate
* update Cargo.lock
* reformat text
* comment out tests for now
* remove `.into()` from P2p
* confirm observed addr manually
See https://github.com/libp2p/rust-libp2p/blob/master/protocols/identify/CHANGELOG.md#0430
* remove SwarmEvent::Banned
since we're not using `ban_peer_id`, this can be safely removed.
we may want to introduce `libp2p::allow_block_list` module in the future.
* fix imports
* replace `libp2p` with smaller deps in network-gossip
* bring back tests
* finish rewriting tests
* uncomment handler tests
* Revert "uncomment handler tests"
This reverts commit 720a06815887f4e10767c62b58864a7ec3a48e50.
* add a fixme
* update Cargo.lock
* remove extra From
* make void uninhabited
* fix discovery test
* use autonat protocols
confirming external addresses manually is unsafe in open networks
* fix SyncNotificationsClogged invariant
* only set server mode manually in tests
doubt that we need to set it on node since we're adding public addresses
* address @dmitry-markin comments
* remove autonat
* removed unused var
* fix EOL
* update smallvec and sha2
in attempt to compile polkadot
* bump k256
in attempt to build cumulus
---------
Co-authored-by: parity-processbot <>
* client/network: upgrade to libp2p 0.51.0
* make discovery.rs compile
* make peer_info.rs compile
* changes to notifications and request-response proto
* make service.rs compile
* towards making request_responses.rs compile
* make request_responses.rs compile
* make request_responses.rs compile
* fix notifications/behaviour.rs tests
* fix warnings
* remove old code
* allow deprecated code (temporary)
* upgrade to libp2p 0.51.1
* add TODO for behaviour tests
* return empty vec if peer_id is absent
https://github.com/paritytech/substrate/pull/13587#discussion_r1141695167
fyi: I don't really know what the old behaviour was.
* update comment to reflect new defaults
Closes#13338
* Revert "update comment to reflect new defaults"
This reverts commit 7a981abd69308e9d522ec94905f181439a1b1dba.
* remove config.rs (from wrong merge)
* upgrade to libp2p 0.51.2
* fix formatting
* use handle_pending_outbound_connection in networt_state RPC
* update deps
* use re-exports when we use other libp2p packages
* Apply suggestions from code review
Co-authored-by: Dmitry Markin <dmitry@markin.tech>
* format code
* handle potential errors in network_state RPC
* only update libp2p crate
* update libp2p-core
* fix docs
* use libp2p-identity instead of libp2p
where it's possible. libp2p-identity is much smaller, hence makes sense
to use it instead of larger libp2p crate.
* Update client/network/src/discovery.rs
Co-authored-by: Aaro Altonen <48052676+altonen@users.noreply.github.com>
* update Cargo.lock
* add comment for per_connection_event_buffer_size
current value is somewhat arbitrary and needs to be tweaked depending on
memory usage and network worker sleep stats.
* fix link format
* update Cargo.lock
* upgrade to libp2p 0.51.3
* deprecate mplex
* Revert "deprecate mplex"
This reverts commit 9e25820e706e464a0e962a8604861fcb2a7641eb.
* Revert "upgrade to libp2p 0.51.3"
This reverts commit 6544dd4138e2f89517bd7c7281fc78a638ec7040.
* use new libp2p version in `statement` crate
* pin version temporarily
* libp2p 0.51.3
* deprecate mplex
* deprecate legacy noise handshake
* fix build error
* update libp2p-identity
* enable libp2p-identity:ed25519 feature in sc-consensus
* enable ed25519 for peerset as well
---------
Co-authored-by: Dmitry Markin <dmitry@markin.tech>
Co-authored-by: Aaro Altonen <48052676+altonen@users.noreply.github.com>
Co-authored-by: parity-processbot <>
Aaro Altonen