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// Copyright (C) Parity Technologies (UK) Ltd.
// This file is part of Polkadot.
// Polkadot is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Polkadot is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Polkadot. If not, see <http://www.gnu.org/licenses/>.
#![allow(clippy::clone_on_copy)]
use super::*;
use crate::*;
use polkadot_node_network_protocol::{
grid_topology::TopologyPeerInfo,
request_response::{outgoing::Recipient, ReqProtocolNames},
v2::{BackedCandidateAcknowledgement, BackedCandidateManifest},
view, ObservedRole,
};
use polkadot_node_primitives::Statement;
use polkadot_node_subsystem::messages::{
network_bridge_event::NewGossipTopology, AllMessages, ChainApiMessage, FragmentTreeMembership,
HypotheticalCandidate, NetworkBridgeEvent, ProspectiveParachainsMessage, ReportPeerMessage,
RuntimeApiMessage, RuntimeApiRequest,
};
use polkadot_node_subsystem_test_helpers as test_helpers;
use polkadot_node_subsystem_util::TimeoutExt;
AssignmentPair, AsyncBackingParams, BlockNumber, CommittedCandidateReceipt, CoreState,
GroupRotationInfo, HeadData, Header, IndexedVec, PersistedValidationData, ScheduledCore,
SessionIndex, SessionInfo, ValidatorPair,
};
use sc_keystore::LocalKeystore;
use sp_application_crypto::Pair as PairT;
use sp_authority_discovery::AuthorityPair as AuthorityDiscoveryPair;
use sp_keyring::Sr25519Keyring;
use assert_matches::assert_matches;
use futures::Future;
use parity_scale_codec::Encode;
use rand::{Rng, SeedableRng};
use std::sync::Arc;
mod cluster;
mod grid;
mod requests;
type VirtualOverseer = test_helpers::TestSubsystemContextHandle<StatementDistributionMessage>;
const DEFAULT_ASYNC_BACKING_PARAMETERS: AsyncBackingParams =
AsyncBackingParams { max_candidate_depth: 4, allowed_ancestry_len: 3 };
// Some deterministic genesis hash for req/res protocol names
const GENESIS_HASH: Hash = Hash::repeat_byte(0xff);
#[derive(Debug, Copy, Clone)]
enum LocalRole {
/// Active validator.
Validator,
/// Authority, not in active validator set.
InactiveValidator,
/// Not a validator.
None,
}
// number of active validators.
validator_count: usize,
// how many validators to place in each group.
group_size: usize,
// whether the local node should be a validator
local_validator: LocalRole,
async_backing_params: Option<AsyncBackingParams>,
}
#[derive(Debug, Clone)]
struct TestLocalValidator {
validator_index: ValidatorIndex,
group_index: Option<GroupIndex>,
}
struct TestState {
config: TestConfig,
local: Option<TestLocalValidator>,
validators: Vec<ValidatorPair>,
session_info: SessionInfo,
req_sender: async_channel::Sender<sc_network::config::IncomingRequest>,
}
impl TestState {
fn from_config(
config: TestConfig,
req_sender: async_channel::Sender<sc_network::config::IncomingRequest>,
rng: &mut impl Rng,
) -> Self {
if config.group_size == 0 {
panic!("group size cannot be 0");
}
let mut validators = Vec::new();
let mut discovery_keys = Vec::new();
let mut assignment_keys = Vec::new();
let mut validator_groups = Vec::new();
let local_validator_pos = if let LocalRole::Validator = config.local_validator {
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// ensure local validator is always in a full group.
Some(rng.gen_range(0..config.validator_count).saturating_sub(config.group_size - 1))
} else {
None
};
for i in 0..config.validator_count {
let validator_pair = if Some(i) == local_validator_pos {
// Note: the specific key is used to ensure the keystore holds
// this key and the subsystem can detect that it is a validator.
Sr25519Keyring::Ferdie.pair().into()
} else {
ValidatorPair::generate().0
};
let assignment_id = AssignmentPair::generate().0.public();
let discovery_id = AuthorityDiscoveryPair::generate().0.public();
let group_index = i / config.group_size;
validators.push(validator_pair);
discovery_keys.push(discovery_id);
assignment_keys.push(assignment_id);
if validator_groups.len() == group_index {
validator_groups.push(vec![ValidatorIndex(i as _)]);
} else {
validator_groups.last_mut().unwrap().push(ValidatorIndex(i as _));
}
}
let local = match (config.local_validator, local_validator_pos) {
(LocalRole::Validator, Some(local_pos)) => Some(TestLocalValidator {
validator_index: ValidatorIndex(local_pos as _),
group_index: Some(GroupIndex((local_pos / config.group_size) as _)),
}),
(LocalRole::InactiveValidator, None) => {
discovery_keys.push(AuthorityDiscoveryPair::generate().0.public());
Some(TestLocalValidator {
validator_index: ValidatorIndex(config.validator_count as u32),
group_index: None,
})
},
_ => None,
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};
let validator_public = validator_pubkeys(&validators);
let session_info = SessionInfo {
validators: validator_public,
discovery_keys,
validator_groups: IndexedVec::from(validator_groups),
assignment_keys,
n_cores: 0,
zeroth_delay_tranche_width: 0,
relay_vrf_modulo_samples: 0,
n_delay_tranches: 0,
no_show_slots: 0,
needed_approvals: 0,
active_validator_indices: vec![],
dispute_period: 6,
random_seed: [0u8; 32],
};
TestState { config, local, validators, session_info, req_sender }
}
fn make_dummy_leaf(&self, relay_parent: Hash) -> TestLeaf {
TestLeaf {
number: 1,
hash: relay_parent,
parent_hash: Hash::repeat_byte(0),
session: 1,
availability_cores: self.make_availability_cores(|i| {
CoreState::Scheduled(ScheduledCore {
para_id: ParaId::from(i as u32),
collator: None,
})
}),
para_data: (0..self.session_info.validator_groups.len())
.map(|i| (ParaId::from(i as u32), PerParaData::new(1, vec![1, 2, 3].into())))
.collect(),
}
}
fn make_availability_cores(&self, f: impl Fn(usize) -> CoreState) -> Vec<CoreState> {
(0..self.session_info.validator_groups.len()).map(f).collect()
}
fn make_dummy_topology(&self) -> NewGossipTopology {
let validator_count = self.config.validator_count;
let is_local_inactive = matches!(self.config.local_validator, LocalRole::InactiveValidator);
let mut indices: Vec<usize> = (0..validator_count).collect();
if is_local_inactive {
indices.push(validator_count);
}
NewGossipTopology {
session: 1,
topology: SessionGridTopology::new(
indices.clone(),
indices
.into_iter()
.map(|i| TopologyPeerInfo {
peer_ids: Vec::new(),
validator_index: ValidatorIndex(i as u32),
discovery_id: self.session_info.discovery_keys[i].clone(),
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})
.collect(),
),
local_index: self.local.as_ref().map(|local| local.validator_index),
}
}
fn group_validators(
&self,
group_index: GroupIndex,
exclude_local: bool,
) -> Vec<ValidatorIndex> {
self.session_info
.validator_groups
.get(group_index)
.unwrap()
.iter()
.cloned()
.filter(|&i| {
self.local.as_ref().map_or(true, |l| !exclude_local || l.validator_index != i)
})
.collect()
}
fn discovery_id(&self, validator_index: ValidatorIndex) -> AuthorityDiscoveryId {
self.session_info.discovery_keys[validator_index.0 as usize].clone()
}
fn sign_statement(
&self,
validator_index: ValidatorIndex,
statement: CompactStatement,
context: &SigningContext,
) -> SignedStatement {
let payload = statement.signing_payload(context);
let pair = &self.validators[validator_index.0 as usize];
let signature = pair.sign(&payload[..]);
SignedStatement::new(statement, validator_index, signature, context, &pair.public())
.unwrap()
}
fn sign_full_statement(
&self,
validator_index: ValidatorIndex,
statement: Statement,
context: &SigningContext,
pvd: PersistedValidationData,
) -> SignedFullStatementWithPVD {
let payload = statement.to_compact().signing_payload(context);
let pair = &self.validators[validator_index.0 as usize];
let signature = pair.sign(&payload[..]);
SignedFullStatementWithPVD::new(
statement.supply_pvd(pvd),
validator_index,
signature,
context,
&pair.public(),
)
.unwrap()
}
// send a request out, returning a future which expects a response.
async fn send_request(
&mut self,
peer: PeerId,
request: AttestedCandidateRequest,
) -> impl Future<Output = sc_network::config::OutgoingResponse> {
let (tx, rx) = futures::channel::oneshot::channel();
let req = sc_network::config::IncomingRequest {
peer,
payload: request.encode(),
pending_response: tx,
};
self.req_sender.send(req).await.unwrap();
rx.map(|r| r.unwrap())
}
}
fn test_harness<T: Future<Output = VirtualOverseer>>(
config: TestConfig,
test: impl FnOnce(TestState, VirtualOverseer) -> T,
) {
let pool = sp_core::testing::TaskExecutor::new();
let keystore = if let LocalRole::Validator = config.local_validator {
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test_helpers::mock::make_ferdie_keystore()
} else {
Arc::new(LocalKeystore::in_memory()) as KeystorePtr
};
let req_protocol_names = ReqProtocolNames::new(&GENESIS_HASH, None);
let (statement_req_receiver, _) = IncomingRequest::get_config_receiver(&req_protocol_names);
let (candidate_req_receiver, req_cfg) =
IncomingRequest::get_config_receiver(&req_protocol_names);
let mut rng = rand_chacha::ChaCha8Rng::seed_from_u64(0);
let test_state = TestState::from_config(config, req_cfg.inbound_queue.unwrap(), &mut rng);
let (context, virtual_overseer) = test_helpers::make_subsystem_context(pool.clone());
let subsystem = async move {
let subsystem = crate::StatementDistributionSubsystem {
keystore,
v1_req_receiver: Some(statement_req_receiver),
req_receiver: Some(candidate_req_receiver),
metrics: Default::default(),
rng,
reputation: ReputationAggregator::new(|_| true),
};
if let Err(e) = subsystem.run(context).await {
panic!("Fatal error: {:?}", e);
}
};
let test_fut = test(test_state, virtual_overseer);
futures::pin_mut!(test_fut);
futures::pin_mut!(subsystem);
futures::executor::block_on(future::join(
async move {
let mut virtual_overseer = test_fut.await;
// Ensure we have handled all responses.
if let Ok(Some(msg)) = virtual_overseer.rx.try_next() {
panic!("Did not handle all responses: {:?}", msg);
}
// Conclude.
virtual_overseer.send(FromOrchestra::Signal(OverseerSignal::Conclude)).await;
},
subsystem,
));
}
struct PerParaData {
min_relay_parent: BlockNumber,
head_data: HeadData,
}
impl PerParaData {
pub fn new(min_relay_parent: BlockNumber, head_data: HeadData) -> Self {
Self { min_relay_parent, head_data }
}
}
struct TestLeaf {
number: BlockNumber,
hash: Hash,
parent_hash: Hash,
session: SessionIndex,
availability_cores: Vec<CoreState>,
para_data: Vec<(ParaId, PerParaData)>,
}
impl TestLeaf {
pub fn para_data(&self, para_id: ParaId) -> &PerParaData {
self.para_data
.iter()
.find_map(|(p_id, data)| if *p_id == para_id { Some(data) } else { None })
.unwrap()
}
}
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struct TestSetupInfo {
local_validator: TestLocalValidator,
local_group: GroupIndex,
local_para: ParaId,
other_group: GroupIndex,
other_para: ParaId,
relay_parent: Hash,
test_leaf: TestLeaf,
peers: Vec<PeerId>,
validators: Vec<ValidatorIndex>,
}
struct TestPeerToConnect {
local: bool,
relay_parent_in_view: bool,
}
// TODO: Generalize, use in more places.
/// Sets up some test info that is common to most tests, and connects the requested peers.
async fn setup_test_and_connect_peers(
state: &TestState,
overseer: &mut VirtualOverseer,
validator_count: usize,
group_size: usize,
peers_to_connect: &[TestPeerToConnect],
) -> TestSetupInfo {
let local_validator = state.local.clone().unwrap();
let local_group = local_validator.group_index.unwrap();
let local_para = ParaId::from(local_group.0);
let other_group = next_group_index(local_group, validator_count, group_size);
let other_para = ParaId::from(other_group.0);
let relay_parent = Hash::repeat_byte(1);
let test_leaf = state.make_dummy_leaf(relay_parent);
// Because we are testing grid mod, the "target" group (the one we communicate with) is usually
// other_group, a non-local group.
//
// TODO: change based on `LocalRole`?
let local_group_validators = state.group_validators(local_group, true);
let other_group_validators = state.group_validators(other_group, true);
let mut peers = vec![];
let mut validators = vec![];
let mut local_group_idx = 0;
let mut other_group_idx = 0;
for peer_to_connect in peers_to_connect {
let peer = PeerId::random();
peers.push(peer);
let v = if peer_to_connect.local {
let v = local_group_validators[local_group_idx];
local_group_idx += 1;
v
} else {
let v = other_group_validators[other_group_idx];
other_group_idx += 1;
v
};
validators.push(v);
connect_peer(overseer, peer, Some(vec![state.discovery_id(v)].into_iter().collect())).await;
if peer_to_connect.relay_parent_in_view {
send_peer_view_change(overseer, peer.clone(), view![relay_parent]).await;
}
}
activate_leaf(overseer, &test_leaf, &state, true).await;
answer_expected_hypothetical_depth_request(overseer, vec![], Some(relay_parent), false).await;
// Send gossip topology.
send_new_topology(overseer, state.make_dummy_topology()).await;
TestSetupInfo {
local_validator,
local_group,
local_para,
other_group,
other_para,
test_leaf,
relay_parent,
peers,
validators,
}
}
async fn activate_leaf(
virtual_overseer: &mut VirtualOverseer,
leaf: &TestLeaf,
test_state: &TestState,
is_new_session: bool,
let activated = new_leaf(leaf.hash, leaf.number);
virtual_overseer
.send(FromOrchestra::Signal(OverseerSignal::ActiveLeaves(ActiveLeavesUpdate::start_work(
activated,
))))
.await;
handle_leaf_activation(virtual_overseer, leaf, test_state, is_new_session).await;
}
async fn handle_leaf_activation(
virtual_overseer: &mut VirtualOverseer,
leaf: &TestLeaf,
test_state: &TestState,
is_new_session: bool,
) {
let TestLeaf { number, hash, parent_hash, para_data, session, availability_cores } = leaf;
assert_matches!(
virtual_overseer.recv().await,
AllMessages::RuntimeApi(
RuntimeApiMessage::Request(parent, RuntimeApiRequest::AsyncBackingParams(tx))
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) if parent == *hash => {
tx.send(Ok(test_state.config.async_backing_params.unwrap_or(DEFAULT_ASYNC_BACKING_PARAMETERS))).unwrap();
}
);
let mrp_response: Vec<(ParaId, BlockNumber)> = para_data
.iter()
.map(|(para_id, data)| (*para_id, data.min_relay_parent))
.collect();
assert_matches!(
virtual_overseer.recv().await,
AllMessages::ProspectiveParachains(
ProspectiveParachainsMessage::GetMinimumRelayParents(parent, tx)
) if parent == *hash => {
tx.send(mrp_response).unwrap();
}
);
let header = Header {
parent_hash: *parent_hash,
number: *number,
state_root: Hash::zero(),
extrinsics_root: Hash::zero(),
digest: Default::default(),
};
assert_matches!(
virtual_overseer.recv().await,
AllMessages::ChainApi(
ChainApiMessage::BlockHeader(parent, tx)
) if parent == *hash => {
tx.send(Ok(Some(header))).unwrap();
}
);
assert_matches!(
virtual_overseer.recv().await,
AllMessages::RuntimeApi(
RuntimeApiMessage::Request(parent, RuntimeApiRequest::SessionIndexForChild(tx))) if parent == *hash => {
tx.send(Ok(*session)).unwrap();
}
);
assert_matches!(
virtual_overseer.recv().await,
AllMessages::RuntimeApi(
RuntimeApiMessage::Request(parent, RuntimeApiRequest::AvailabilityCores(tx))) if parent == *hash => {
tx.send(Ok(availability_cores.clone())).unwrap();
}
);
let validator_groups = test_state.session_info.validator_groups.to_vec();
let group_rotation_info =
GroupRotationInfo { session_start_block: 1, group_rotation_frequency: 12, now: 1 };
assert_matches!(
virtual_overseer.recv().await,
AllMessages::RuntimeApi(
RuntimeApiMessage::Request(parent, RuntimeApiRequest::ValidatorGroups(tx))) if parent == *hash => {
tx.send(Ok((validator_groups, group_rotation_info))).unwrap();
}
);
if is_new_session {
assert_matches!(
virtual_overseer.recv().await,
AllMessages::RuntimeApi(
RuntimeApiMessage::Request(parent, RuntimeApiRequest::SessionInfo(s, tx))) if parent == *hash && s == *session => {
tx.send(Ok(Some(test_state.session_info.clone()))).unwrap();
}
);
assert_matches!(
virtual_overseer.recv().await,
AllMessages::RuntimeApi(RuntimeApiMessage::Request(
parent,
RuntimeApiRequest::MinimumBackingVotes(session_index, tx),
)) if parent == *hash && session_index == *session => {
tx.send(Ok(2)).unwrap();
}
);
}
}
/// Intercepts an outgoing request, checks the fields, and sends the response.
async fn handle_sent_request(
virtual_overseer: &mut VirtualOverseer,
peer: PeerId,
candidate_hash: CandidateHash,
mask: StatementFilter,
candidate_receipt: CommittedCandidateReceipt,
persisted_validation_data: PersistedValidationData,
statements: Vec<UncheckedSignedStatement>,
) {
assert_matches!(
virtual_overseer.recv().await,
AllMessages::NetworkBridgeTx(NetworkBridgeTxMessage::SendRequests(mut requests, IfDisconnected::ImmediateError)) => {
assert_eq!(requests.len(), 1);
assert_matches!(
requests.pop().unwrap(),
Requests::AttestedCandidateV2(outgoing) => {
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assert_eq!(outgoing.peer, Recipient::Peer(peer));
assert_eq!(outgoing.payload.candidate_hash, candidate_hash);
assert_eq!(outgoing.payload.mask, mask);
let res = AttestedCandidateResponse {
candidate_receipt,
persisted_validation_data,
statements,
};
outgoing.pending_response.send(Ok(res.encode())).unwrap();
}
);
}
);
}
async fn answer_expected_hypothetical_depth_request(
virtual_overseer: &mut VirtualOverseer,
responses: Vec<(HypotheticalCandidate, FragmentTreeMembership)>,
expected_leaf_hash: Option<Hash>,
expected_backed_in_path_only: bool,
) {
assert_matches!(
virtual_overseer.recv().await,
AllMessages::ProspectiveParachains(
ProspectiveParachainsMessage::GetHypotheticalFrontier(req, tx)
) => {
assert_eq!(req.fragment_tree_relay_parent, expected_leaf_hash);
assert_eq!(req.backed_in_path_only, expected_backed_in_path_only);
for (i, (candidate, _)) in responses.iter().enumerate() {
assert!(
req.candidates.iter().any(|c| &c == &candidate),
"did not receive request for hypothetical candidate {}",
i,
);
}
tx.send(responses).unwrap();
}
)
}
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#[macro_export]
macro_rules! assert_peer_reported {
($virtual_overseer:expr, $peer_id:expr, $rep_change:expr $(,)*) => {
assert_matches!(
$virtual_overseer.recv().await,
AllMessages::NetworkBridgeTx(NetworkBridgeTxMessage::ReportPeer(ReportPeerMessage::Single(p, r)))
if p == $peer_id && r == $rep_change.into()
);
}
}
async fn send_share_message(
virtual_overseer: &mut VirtualOverseer,
relay_parent: Hash,
statement: SignedFullStatementWithPVD,
) {
virtual_overseer
.send(FromOrchestra::Communication {
msg: StatementDistributionMessage::Share(relay_parent, statement),
})
.await;
}
async fn send_backed_message(
virtual_overseer: &mut VirtualOverseer,
candidate_hash: CandidateHash,
) {
virtual_overseer
.send(FromOrchestra::Communication {
msg: StatementDistributionMessage::Backed(candidate_hash),
})
.await;
}
async fn send_manifest_from_peer(
virtual_overseer: &mut VirtualOverseer,
peer_id: PeerId,
manifest: BackedCandidateManifest,
) {
send_peer_message(
virtual_overseer,
peer_id,
protocol_v2::StatementDistributionMessage::BackedCandidateManifest(manifest),
)
.await;
}
async fn send_ack_from_peer(
virtual_overseer: &mut VirtualOverseer,
peer_id: PeerId,
ack: BackedCandidateAcknowledgement,
) {
send_peer_message(
virtual_overseer,
peer_id,
protocol_v2::StatementDistributionMessage::BackedCandidateKnown(ack),
)
.await;
}
fn validator_pubkeys(val_ids: &[ValidatorPair]) -> IndexedVec<ValidatorIndex, ValidatorId> {
val_ids.iter().map(|v| v.public().into()).collect()
}
async fn connect_peer(
virtual_overseer: &mut VirtualOverseer,
peer: PeerId,
authority_ids: Option<HashSet<AuthorityDiscoveryId>>,
) {
virtual_overseer
.send(FromOrchestra::Communication {
msg: StatementDistributionMessage::NetworkBridgeUpdate(
NetworkBridgeEvent::PeerConnected(
peer,
ObservedRole::Authority,
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authority_ids,
),
),
})
.await;
}
// TODO: Add some tests using this?
#[allow(dead_code)]
async fn disconnect_peer(virtual_overseer: &mut VirtualOverseer, peer: PeerId) {
virtual_overseer
.send(FromOrchestra::Communication {
msg: StatementDistributionMessage::NetworkBridgeUpdate(
NetworkBridgeEvent::PeerDisconnected(peer),
),
})
.await;
}
async fn send_peer_view_change(virtual_overseer: &mut VirtualOverseer, peer: PeerId, view: View) {
virtual_overseer
.send(FromOrchestra::Communication {
msg: StatementDistributionMessage::NetworkBridgeUpdate(
NetworkBridgeEvent::PeerViewChange(peer, view),
),
})
.await;
}
async fn send_peer_message(
virtual_overseer: &mut VirtualOverseer,
peer: PeerId,
message: protocol_v2::StatementDistributionMessage,
) {
virtual_overseer
.send(FromOrchestra::Communication {
msg: StatementDistributionMessage::NetworkBridgeUpdate(
NetworkBridgeEvent::PeerMessage(peer, Versioned::V2(message)),
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),
})
.await;
}
async fn send_new_topology(virtual_overseer: &mut VirtualOverseer, topology: NewGossipTopology) {
virtual_overseer
.send(FromOrchestra::Communication {
msg: StatementDistributionMessage::NetworkBridgeUpdate(
NetworkBridgeEvent::NewGossipTopology(topology),
),
})
.await;
}
async fn overseer_recv_with_timeout(
overseer: &mut VirtualOverseer,
timeout: Duration,
) -> Option<AllMessages> {
gum::trace!("waiting for message...");
overseer.recv().timeout(timeout).await
}
fn next_group_index(
group_index: GroupIndex,
validator_count: usize,
group_size: usize,
) -> GroupIndex {
let next_group = group_index.0 + 1;
let num_groups =
validator_count / group_size + if validator_count % group_size > 0 { 1 } else { 0 };
GroupIndex::from(next_group % num_groups as u32)
}