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Merge remote-tracking branch 'origin/unstable' into tree-states

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This commit is contained in:
Michael Sproul
2023-09-13 11:25:18 +10:00
parent 1e4ee7aa5e 35f47f454f
commit b8e04ce5a4
250 changed files with 13730 additions and 5455 deletions
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9
beacon_node/http_api/src/attester_duties.rs
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@@ -1,9 +1,7 @@
//! Contains the handler for the `GET validator/duties/attester/{epoch}` endpoint.
use crate::state_id::StateId;
use beacon_chain::{
BeaconChain, BeaconChainError, BeaconChainTypes, MAXIMUM_GOSSIP_CLOCK_DISPARITY,
};
use beacon_chain::{BeaconChain, BeaconChainError, BeaconChainTypes};
use eth2::types::{self as api_types};
use slot_clock::SlotClock;
use state_processing::state_advance::partial_state_advance;
@@ -30,12 +28,11 @@ pub fn attester_duties<T: BeaconChainTypes>(
// will equal `current_epoch + 1`
let tolerant_current_epoch = chain
.slot_clock
.now_with_future_tolerance(MAXIMUM_GOSSIP_CLOCK_DISPARITY)
.now_with_future_tolerance(chain.spec.maximum_gossip_clock_disparity())
.ok_or_else(|| warp_utils::reject::custom_server_error("unable to read slot clock".into()))?
.epoch(T::EthSpec::slots_per_epoch());
if request_epoch == current_epoch
|| request_epoch == tolerant_current_epoch
|| request_epoch == current_epoch + 1
|| request_epoch == tolerant_current_epoch + 1
{
@@ -46,7 +43,7 @@ pub fn attester_duties<T: BeaconChainTypes>(
request_epoch, current_epoch
)))
} else {
// request_epoch < current_epoch
// request_epoch < current_epoch, in fact we only allow `request_epoch == current_epoch-1` in this case
compute_historic_attester_duties(request_epoch, request_indices, chain)
}
}

72
beacon_node/http_api/src/builder_states.rs Normal file
View File

@@ -0,0 +1,72 @@
use crate::StateId;
use beacon_chain::{BeaconChain, BeaconChainTypes};
use safe_arith::SafeArith;
use state_processing::per_block_processing::get_expected_withdrawals;
use state_processing::state_advance::partial_state_advance;
use std::sync::Arc;
use types::{BeaconState, EthSpec, ForkName, Slot, Withdrawals};
const MAX_EPOCH_LOOKAHEAD: u64 = 2;
/// Get the withdrawals computed from the specified state, that will be included in the block
/// that gets built on the specified state.
pub fn get_next_withdrawals<T: BeaconChainTypes>(
chain: &Arc<BeaconChain<T>>,
mut state: BeaconState<T::EthSpec>,
state_id: StateId,
proposal_slot: Slot,
) -> Result<Withdrawals<T::EthSpec>, warp::Rejection> {
get_next_withdrawals_sanity_checks(chain, &state, proposal_slot)?;
// advance the state to the epoch of the proposal slot.
let proposal_epoch = proposal_slot.epoch(T::EthSpec::slots_per_epoch());
let (state_root, _, _) = state_id.root(chain)?;
if proposal_epoch != state.current_epoch() {
if let Err(e) =
partial_state_advance(&mut state, Some(state_root), proposal_slot, &chain.spec)
{
return Err(warp_utils::reject::custom_server_error(format!(
"failed to advance to the epoch of the proposal slot: {:?}",
e
)));
}
}
match get_expected_withdrawals(&state, &chain.spec) {
Ok(withdrawals) => Ok(withdrawals),
Err(e) => Err(warp_utils::reject::custom_server_error(format!(
"failed to get expected withdrawal: {:?}",
e
))),
}
}
fn get_next_withdrawals_sanity_checks<T: BeaconChainTypes>(
chain: &BeaconChain<T>,
state: &BeaconState<T::EthSpec>,
proposal_slot: Slot,
) -> Result<(), warp::Rejection> {
if proposal_slot <= state.slot() {
return Err(warp_utils::reject::custom_bad_request(
"proposal slot must be greater than the pre-state slot".to_string(),
));
}
let fork = chain.spec.fork_name_at_slot::<T::EthSpec>(proposal_slot);
if let ForkName::Base | ForkName::Altair | ForkName::Merge = fork {
return Err(warp_utils::reject::custom_bad_request(
"the specified state is a pre-capella state.".to_string(),
));
}
let look_ahead_limit = MAX_EPOCH_LOOKAHEAD
.safe_mul(T::EthSpec::slots_per_epoch())
.map_err(warp_utils::reject::arith_error)?;
if proposal_slot >= state.slot() + look_ahead_limit {
return Err(warp_utils::reject::custom_bad_request(format!(
"proposal slot is greater than or equal to the look ahead limit: {look_ahead_limit}"
)));
}
Ok(())
}

2477
beacon_node/http_api/src/lib.rs
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File diff suppressed because it is too large Load Diff

4
beacon_node/http_api/src/proposer_duties.rs
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@@ -3,7 +3,7 @@
use crate::state_id::StateId;
use beacon_chain::{
beacon_proposer_cache::{compute_proposer_duties_from_head, ensure_state_is_in_epoch},
BeaconChain, BeaconChainError, BeaconChainTypes, MAXIMUM_GOSSIP_CLOCK_DISPARITY,
BeaconChain, BeaconChainError, BeaconChainTypes,
};
use eth2::types::{self as api_types};
use safe_arith::SafeArith;
@@ -33,7 +33,7 @@ pub fn proposer_duties<T: BeaconChainTypes>(
// will equal `current_epoch + 1`
let tolerant_current_epoch = chain
.slot_clock
.now_with_future_tolerance(MAXIMUM_GOSSIP_CLOCK_DISPARITY)
.now_with_future_tolerance(chain.spec.maximum_gossip_clock_disparity())
.ok_or_else(|| warp_utils::reject::custom_server_error("unable to read slot clock".into()))?
.epoch(T::EthSpec::slots_per_epoch());

47
beacon_node/http_api/src/publish_blocks.rs
View File

@@ -4,7 +4,7 @@ use beacon_chain::{
BeaconChain, BeaconChainError, BeaconChainTypes, BlockError, IntoGossipVerifiedBlock,
NotifyExecutionLayer,
};
use eth2::types::BroadcastValidation;
use eth2::types::{BroadcastValidation, ErrorMessage};
use execution_layer::ProvenancedPayload;
use lighthouse_network::PubsubMessage;
use network::NetworkMessage;
@@ -19,7 +19,8 @@ use types::{
AbstractExecPayload, BeaconBlockRef, BlindedPayload, EthSpec, ExecPayload, ExecutionBlockHash,
FullPayload, Hash256, SignedBeaconBlock,
};
use warp::Rejection;
use warp::http::StatusCode;
use warp::{reply::Response, Rejection, Reply};
pub enum ProvenancedBlock<T: BeaconChainTypes, B: IntoGossipVerifiedBlock<T>> {
/// The payload was built using a local EE.
@@ -47,7 +48,8 @@ pub async fn publish_block<T: BeaconChainTypes, B: IntoGossipVerifiedBlock<T>>(
network_tx: &UnboundedSender<NetworkMessage<T::EthSpec>>,
log: Logger,
validation_level: BroadcastValidation,
) -> Result<(), Rejection> {
duplicate_status_code: StatusCode,
) -> Result<Response, Rejection> {
let seen_timestamp = timestamp_now();
let (block, is_locally_built_block) = match provenanced_block {
ProvenancedBlock::Local(block, _) => (block, true),
@@ -75,10 +77,30 @@ pub async fn publish_block<T: BeaconChainTypes, B: IntoGossipVerifiedBlock<T>>(
};
/* if we can form a `GossipVerifiedBlock`, we've passed our basic gossip checks */
let gossip_verified_block = block.into_gossip_verified_block(&chain).map_err(|e| {
warn!(log, "Not publishing block, not gossip verified"; "slot" => beacon_block.slot(), "error" => ?e);
warp_utils::reject::custom_bad_request(e.to_string())
})?;
let gossip_verified_block = match block.into_gossip_verified_block(&chain) {
Ok(b) => b,
Err(BlockError::BlockIsAlreadyKnown) => {
// Allow the status code for duplicate blocks to be overridden based on config.
return Ok(warp::reply::with_status(
warp::reply::json(&ErrorMessage {
code: duplicate_status_code.as_u16(),
message: "duplicate block".to_string(),
stacktraces: vec![],
}),
duplicate_status_code,
)
.into_response());
}
Err(e) => {
warn!(
log,
"Not publishing block - not gossip verified";
"slot" => beacon_block.slot(),
"error" => ?e
);
return Err(warp_utils::reject::custom_bad_request(e.to_string()));
}
};
let block_root = block_root.unwrap_or(gossip_verified_block.block_root);
@@ -167,8 +189,7 @@ pub async fn publish_block<T: BeaconChainTypes, B: IntoGossipVerifiedBlock<T>>(
&log,
)
}
Ok(())
Ok(warp::reply().into_response())
}
Err(BlockError::BeaconChainError(BeaconChainError::UnableToPublish)) => {
Err(warp_utils::reject::custom_server_error(
@@ -178,10 +199,6 @@ pub async fn publish_block<T: BeaconChainTypes, B: IntoGossipVerifiedBlock<T>>(
Err(BlockError::Slashable) => Err(warp_utils::reject::custom_bad_request(
"proposal for this slot and proposer has already been seen".to_string(),
)),
Err(BlockError::BlockIsAlreadyKnown) => {
info!(log, "Block from HTTP API already known"; "block" => ?block_root);
Ok(())
}
Err(e) => {
if let BroadcastValidation::Gossip = validation_level {
Err(warp_utils::reject::broadcast_without_import(format!("{e}")))
@@ -208,7 +225,8 @@ pub async fn publish_blinded_block<T: BeaconChainTypes>(
network_tx: &UnboundedSender<NetworkMessage<T::EthSpec>>,
log: Logger,
validation_level: BroadcastValidation,
) -> Result<(), Rejection> {
duplicate_status_code: StatusCode,
) -> Result<Response, Rejection> {
let block_root = block.canonical_root();
let full_block: ProvenancedBlock<T, Arc<SignedBeaconBlock<T::EthSpec>>> =
reconstruct_block(chain.clone(), block_root, block, log.clone()).await?;
@@ -219,6 +237,7 @@ pub async fn publish_blinded_block<T: BeaconChainTypes>(
network_tx,
log,
validation_level,
duplicate_status_code,
)
.await
}

4
beacon_node/http_api/src/state_id.rs
View File

@@ -89,9 +89,7 @@ impl StateId {
} else {
// This block is either old and finalized, or recent and unfinalized, so
// it's safe to fallback to the optimistic status of the finalized block.
chain
.canonical_head
.fork_choice_read_lock()
fork_choice
.is_optimistic_or_invalid_block(&hot_summary.latest_block_root)
.map_err(BeaconChainError::ForkChoiceError)
.map_err(warp_utils::reject::beacon_chain_error)?

4
beacon_node/http_api/src/sync_committees.rs
View File

@@ -6,7 +6,7 @@ use beacon_chain::sync_committee_verification::{
};
use beacon_chain::{
validator_monitor::timestamp_now, BeaconChain, BeaconChainError, BeaconChainTypes,
StateSkipConfig, MAXIMUM_GOSSIP_CLOCK_DISPARITY,
StateSkipConfig,
};
use eth2::types::{self as api_types};
use lighthouse_network::PubsubMessage;
@@ -85,7 +85,7 @@ fn duties_from_state_load<T: BeaconChainTypes>(
let current_epoch = chain.epoch()?;
let tolerant_current_epoch = chain
.slot_clock
.now_with_future_tolerance(MAXIMUM_GOSSIP_CLOCK_DISPARITY)
.now_with_future_tolerance(chain.spec.maximum_gossip_clock_disparity())
.ok_or(BeaconChainError::UnableToReadSlot)?
.epoch(T::EthSpec::slots_per_epoch());

192
beacon_node/http_api/src/task_spawner.rs Normal file
View File

@@ -0,0 +1,192 @@
use beacon_processor::{BeaconProcessorSend, BlockingOrAsync, Work, WorkEvent};
use serde::Serialize;
use std::future::Future;
use tokio::sync::{mpsc::error::TrySendError, oneshot};
use types::EthSpec;
use warp::reply::{Reply, Response};
/// Maps a request to a queue in the `BeaconProcessor`.
#[derive(Clone, Copy)]
pub enum Priority {
/// The highest priority.
P0,
/// The lowest priority.
P1,
}
impl Priority {
/// Wrap `self` in a `WorkEvent` with an appropriate priority.
fn work_event<E: EthSpec>(&self, process_fn: BlockingOrAsync) -> WorkEvent<E> {
let work = match self {
Priority::P0 => Work::ApiRequestP0(process_fn),
Priority::P1 => Work::ApiRequestP1(process_fn),
};
WorkEvent {
drop_during_sync: false,
work,
}
}
}
/// Spawns tasks on the `BeaconProcessor` or directly on the tokio executor.
pub struct TaskSpawner<E: EthSpec> {
/// Used to send tasks to the `BeaconProcessor`. The tokio executor will be
/// used if this is `None`.
beacon_processor_send: Option<BeaconProcessorSend<E>>,
}
/// Convert a warp `Rejection` into a `Response`.
///
/// This function should *always* be used to convert rejections into responses. This prevents warp
/// from trying to backtrack in strange ways. See: https://github.com/sigp/lighthouse/issues/3404
pub async fn convert_rejection<T: Reply>(res: Result<T, warp::Rejection>) -> Response {
match res {
Ok(response) => response.into_response(),
Err(e) => match warp_utils::reject::handle_rejection(e).await {
Ok(reply) => reply.into_response(),
Err(_) => warp::reply::with_status(
warp::reply::json(&"unhandled error"),
eth2::StatusCode::INTERNAL_SERVER_ERROR,
)
.into_response(),
},
}
}
impl<E: EthSpec> TaskSpawner<E> {
pub fn new(beacon_processor_send: Option<BeaconProcessorSend<E>>) -> Self {
Self {
beacon_processor_send,
}
}
/// Executes a "blocking" (non-async) task which returns a `Response`.
pub async fn blocking_response_task<F, T>(self, priority: Priority, func: F) -> Response
where
F: FnOnce() -> Result<T, warp::Rejection> + Send + Sync + 'static,
T: Reply + Send + 'static,
{
if let Some(beacon_processor_send) = &self.beacon_processor_send {
// Create a closure that will execute `func` and send the result to
// a channel held by this thread.
let (tx, rx) = oneshot::channel();
let process_fn = move || {
// Execute the function, collect the return value.
let func_result = func();
// Send the result down the channel. Ignore any failures; the
// send can only fail if the receiver is dropped.
let _ = tx.send(func_result);
};
// Send the function to the beacon processor for execution at some arbitrary time.
let result = send_to_beacon_processor(
beacon_processor_send,
priority,
BlockingOrAsync::Blocking(Box::new(process_fn)),
rx,
)
.await
.and_then(|x| x);
convert_rejection(result).await
} else {
// There is no beacon processor so spawn a task directly on the
// tokio executor.
convert_rejection(warp_utils::task::blocking_response_task(func).await).await
}
}
/// Executes a "blocking" (non-async) task which returns a JSON-serializable
/// object.
pub async fn blocking_json_task<F, T>(self, priority: Priority, func: F) -> Response
where
F: FnOnce() -> Result<T, warp::Rejection> + Send + Sync + 'static,
T: Serialize + Send + 'static,
{
let func = || func().map(|t| warp::reply::json(&t).into_response());
self.blocking_response_task(priority, func).await
}
/// Executes an async task which may return a `Rejection`, which will be converted to a response.
pub async fn spawn_async_with_rejection(
self,
priority: Priority,
func: impl Future<Output = Result<Response, warp::Rejection>> + Send + Sync + 'static,
) -> Response {
let result = self
.spawn_async_with_rejection_no_conversion(priority, func)
.await;
convert_rejection(result).await
}
/// Same as `spawn_async_with_rejection` but returning a result with the unhandled rejection.
///
/// If you call this function you MUST convert the rejection to a response and not let it
/// propagate into Warp's filters. See `convert_rejection`.
pub async fn spawn_async_with_rejection_no_conversion(
self,
priority: Priority,
func: impl Future<Output = Result<Response, warp::Rejection>> + Send + Sync + 'static,
) -> Result<Response, warp::Rejection> {
if let Some(beacon_processor_send) = &self.beacon_processor_send {
// Create a wrapper future that will execute `func` and send the
// result to a channel held by this thread.
let (tx, rx) = oneshot::channel();
let process_fn = async move {
// Await the future, collect the return value.
let func_result = func.await;
// Send the result down the channel. Ignore any failures; the
// send can only fail if the receiver is dropped.
let _ = tx.send(func_result);
};
// Send the function to the beacon processor for execution at some arbitrary time.
send_to_beacon_processor(
beacon_processor_send,
priority,
BlockingOrAsync::Async(Box::pin(process_fn)),
rx,
)
.await
.and_then(|x| x)
} else {
// There is no beacon processor so spawn a task directly on the
// tokio executor.
tokio::task::spawn(func)
.await
.map_err(|_| {
warp_utils::reject::custom_server_error("Tokio failed to spawn task".into())
})
.and_then(|x| x)
}
}
}
/// Send a task to the beacon processor and await execution.
///
/// If the task is not executed, return an `Err` with an error message
/// for the API consumer.
async fn send_to_beacon_processor<E: EthSpec, T>(
beacon_processor_send: &BeaconProcessorSend<E>,
priority: Priority,
process_fn: BlockingOrAsync,
rx: oneshot::Receiver<T>,
) -> Result<T, warp::Rejection> {
let error_message = match beacon_processor_send.try_send(priority.work_event(process_fn)) {
Ok(()) => {
match rx.await {
// The beacon processor executed the task and sent a result.
Ok(func_result) => return Ok(func_result),
// The beacon processor dropped the channel without sending a
// result. The beacon processor dropped this task because its
// queues are full or it's shutting down.
Err(_) => "The task did not execute. The server is overloaded or shutting down.",
}
}
Err(TrySendError::Full(_)) => "The task was dropped. The server is overloaded.",
Err(TrySendError::Closed(_)) => "The task was dropped. The server is shutting down.",
};
Err(warp_utils::reject::custom_server_error(
error_message.to_string(),
))
}

79
beacon_node/http_api/src/test_utils.rs
View File

@@ -5,16 +5,14 @@ use beacon_chain::{
},
BeaconChain, BeaconChainTypes,
};
use beacon_processor::{BeaconProcessor, BeaconProcessorChannels, BeaconProcessorConfig};
use directory::DEFAULT_ROOT_DIR;
use eth2::{BeaconNodeHttpClient, Timeouts};
use lighthouse_network::{
discv5::enr::{CombinedKey, EnrBuilder},
libp2p::{
core::connection::ConnectionId,
swarm::{
behaviour::{ConnectionEstablished, FromSwarm},
NetworkBehaviour,
},
libp2p::swarm::{
behaviour::{ConnectionEstablished, FromSwarm},
ConnectionId, NetworkBehaviour,
},
rpc::methods::{MetaData, MetaDataV2},
types::{EnrAttestationBitfield, EnrSyncCommitteeBitfield, SyncState},
@@ -25,11 +23,11 @@ use network::{NetworkReceivers, NetworkSenders};
use sensitive_url::SensitiveUrl;
use slog::Logger;
use std::future::Future;
use std::net::{IpAddr, Ipv4Addr, SocketAddr};
use std::net::SocketAddr;
use std::sync::Arc;
use std::time::Duration;
use store::MemoryStore;
use tokio::sync::oneshot;
use task_executor::test_utils::TestRuntime;
use types::{ChainSpec, EthSpec};
pub const TCP_PORT: u16 = 42;
@@ -42,7 +40,6 @@ pub struct InteractiveTester<E: EthSpec> {
pub harness: BeaconChainHarness<EphemeralHarnessType<E>>,
pub client: BeaconNodeHttpClient,
pub network_rx: NetworkReceivers<E>,
_server_shutdown: oneshot::Sender<()>,
}
/// The result of calling `create_api_server`.
@@ -51,7 +48,6 @@ pub struct InteractiveTester<E: EthSpec> {
pub struct ApiServer<E: EthSpec, SFut: Future<Output = ()>> {
pub server: SFut,
pub listening_socket: SocketAddr,
pub shutdown_tx: oneshot::Sender<()>,
pub network_rx: NetworkReceivers<E>,
pub local_enr: Enr,
pub external_peer_id: PeerId,
@@ -99,10 +95,14 @@ impl<E: EthSpec> InteractiveTester<E> {
let ApiServer {
server,
listening_socket,
shutdown_tx: _server_shutdown,
network_rx,
..
} = create_api_server(harness.chain.clone(), harness.logger().clone()).await;
} = create_api_server(
harness.chain.clone(),
&harness.runtime,
harness.logger().clone(),
)
.await;
tokio::spawn(server);
@@ -120,22 +120,23 @@ impl<E: EthSpec> InteractiveTester<E> {
harness,
client,
network_rx,
_server_shutdown,
}
}
}
pub async fn create_api_server<T: BeaconChainTypes>(
chain: Arc<BeaconChain<T>>,
test_runtime: &TestRuntime,
log: Logger,
) -> ApiServer<T::EthSpec, impl Future<Output = ()>> {
// Get a random unused port.
let port = unused_port::unused_tcp4_port().unwrap();
create_api_server_on_port(chain, log, port).await
create_api_server_on_port(chain, test_runtime, log, port).await
}
pub async fn create_api_server_on_port<T: BeaconChainTypes>(
chain: Arc<BeaconChain<T>>,
test_runtime: &TestRuntime,
log: Logger,
port: u16,
) -> ApiServer<T::EthSpec, impl Future<Output = ()>> {
@@ -170,7 +171,7 @@ pub async fn create_api_server_on_port<T: BeaconChainTypes>(
local_addr: EXTERNAL_ADDR.parse().unwrap(),
send_back_addr: EXTERNAL_ADDR.parse().unwrap(),
};
let connection_id = ConnectionId::new(1);
let connection_id = ConnectionId::new_unchecked(1);
pm.on_swarm_event(FromSwarm::ConnectionEstablished(ConnectionEstablished {
peer_id,
connection_id,
@@ -183,36 +184,60 @@ pub async fn create_api_server_on_port<T: BeaconChainTypes>(
let eth1_service =
eth1::Service::new(eth1::Config::default(), log.clone(), chain.spec.clone()).unwrap();
let beacon_processor_config = BeaconProcessorConfig {
// The number of workers must be greater than one. Tests which use the
// builder workflow sometimes require an internal HTTP request in order
// to fulfill an already in-flight HTTP request, therefore having only
// one worker will result in a deadlock.
max_workers: 2,
..BeaconProcessorConfig::default()
};
let BeaconProcessorChannels {
beacon_processor_tx,
beacon_processor_rx,
work_reprocessing_tx,
work_reprocessing_rx,
} = BeaconProcessorChannels::new(&beacon_processor_config);
let beacon_processor_send = beacon_processor_tx;
BeaconProcessor {
network_globals: network_globals.clone(),
executor: test_runtime.task_executor.clone(),
current_workers: 0,
config: beacon_processor_config,
log: log.clone(),
}
.spawn_manager(
beacon_processor_rx,
work_reprocessing_tx,
work_reprocessing_rx,
None,
chain.slot_clock.clone(),
chain.spec.maximum_gossip_clock_disparity(),
)
.unwrap();
let ctx = Arc::new(Context {
config: Config {
enabled: true,
listen_addr: IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)),
listen_port: port,
allow_origin: None,
tls_config: None,
allow_sync_stalled: false,
data_dir: std::path::PathBuf::from(DEFAULT_ROOT_DIR),
spec_fork_name: None,
..Config::default()
},
chain: Some(chain),
network_senders: Some(network_senders),
network_globals: Some(network_globals),
beacon_processor_send: Some(beacon_processor_send),
eth1_service: Some(eth1_service),
sse_logging_components: None,
log,
});
let (shutdown_tx, shutdown_rx) = oneshot::channel();
let server_shutdown = async {
// It's not really interesting why this triggered, just that it happened.
let _ = shutdown_rx.await;
};
let (listening_socket, server) = crate::serve(ctx, server_shutdown).unwrap();
let (listening_socket, server) = crate::serve(ctx, test_runtime.task_executor.exit()).unwrap();
ApiServer {
server,
listening_socket,
shutdown_tx,
network_rx: network_receivers,
local_enr: enr,
external_peer_id: peer_id,

21
beacon_node/http_api/src/validator.rs Normal file
View File

@@ -0,0 +1,21 @@
use beacon_chain::{BeaconChain, BeaconChainError, BeaconChainTypes};
use types::*;
/// Uses the `chain.validator_pubkey_cache` to resolve a pubkey to a validator
/// index and then ensures that the validator exists in the given `state`.
pub fn pubkey_to_validator_index<T: BeaconChainTypes>(
chain: &BeaconChain<T>,
state: &BeaconState<T::EthSpec>,
pubkey: &PublicKeyBytes,
) -> Result<Option<usize>, BeaconChainError> {
chain
.validator_index(pubkey)?
.filter(|&index| {
state
.validators()
.get(index)
.map_or(false, |v| *v.pubkey == *pubkey)
})
.map(Result::Ok)
.transpose()
}