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mod.rs
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//! CKB node has initial block download phase (IBD mode) like Bitcoin:
//! <https://btcinformation.org/en/glossary/initial-block-download>
//!
//! When CKB node is in IBD mode, it will respond `packed::InIBD` to `GetHeaders` and `GetBlocks` requests
//!
//! And CKB has a headers-first synchronization style like Bitcoin:
//! <https://btcinformation.org/en/glossary/headers-first-sync>
//!
mod block_fetcher;
mod block_process;
mod get_blocks_process;
mod get_headers_process;
mod headers_process;
mod in_ibd_process;
pub(crate) use self::block_fetcher::BlockFetcher;
pub(crate) use self::block_process::BlockProcess;
pub(crate) use self::get_blocks_process::GetBlocksProcess;
pub(crate) use self::get_headers_process::GetHeadersProcess;
pub(crate) use self::headers_process::HeadersProcess;
pub(crate) use self::in_ibd_process::InIBDProcess;
use crate::block_status::BlockStatus;
use crate::types::{HeaderIndexView, HeadersSyncController, IBDState, Peers, SyncShared};
use crate::utils::{metric_ckb_message_bytes, send_message_to, MetricDirection};
use crate::{Status, StatusCode};
use ckb_chain::chain::ChainController;
use ckb_channel as channel;
use ckb_channel::{select, Receiver};
use ckb_constant::sync::{
BAD_MESSAGE_BAN_TIME, CHAIN_SYNC_TIMEOUT, EVICTION_HEADERS_RESPONSE_TIME,
INIT_BLOCKS_IN_TRANSIT_PER_PEER, MAX_TIP_AGE,
};
use ckb_error::Error as CKBError;
use ckb_logger::{debug, error, info, trace, warn};
use ckb_network::{
async_trait, bytes::Bytes, tokio, CKBProtocolContext, CKBProtocolHandler, PeerIndex,
ServiceControl, SupportProtocols,
};
use ckb_stop_handler::{new_crossbeam_exit_rx, register_thread};
use ckb_systemtime::unix_time_as_millis;
use ckb_types::{
core::{self, BlockNumber},
packed::{self, Byte32},
prelude::*,
};
use std::{
collections::HashSet,
sync::{atomic::Ordering, Arc},
time::{Duration, Instant},
};
pub const SEND_GET_HEADERS_TOKEN: u64 = 0;
pub const IBD_BLOCK_FETCH_TOKEN: u64 = 1;
pub const NOT_IBD_BLOCK_FETCH_TOKEN: u64 = 2;
pub const TIMEOUT_EVICTION_TOKEN: u64 = 3;
pub const NO_PEER_CHECK_TOKEN: u64 = 255;
const SYNC_NOTIFY_INTERVAL: Duration = Duration::from_secs(1);
const IBD_BLOCK_FETCH_INTERVAL: Duration = Duration::from_millis(40);
const NOT_IBD_BLOCK_FETCH_INTERVAL: Duration = Duration::from_millis(200);
#[derive(Copy, Clone)]
enum CanStart {
Ready,
MinWorkNotReach,
AssumeValidNotFound,
}
// TODO: Consider converting this enum to a struct since it only has one item
//
// struct FetchCMD {
// peers: Vec<PeerIndex>,
// ibd_state: IBDState,
// }
//
enum FetchCMD {
Fetch((Vec<PeerIndex>, IBDState)),
}
struct BlockFetchCMD {
sync_shared: Arc<SyncShared>,
p2p_control: ServiceControl,
recv: channel::Receiver<FetchCMD>,
can_start: CanStart,
number: BlockNumber,
}
impl BlockFetchCMD {
fn process_fetch_cmd(&mut self, cmd: FetchCMD) {
match cmd {
FetchCMD::Fetch((peers, state)) => match self.can_start() {
CanStart::Ready => {
for peer in peers {
if let Some(fetch) =
BlockFetcher::new(Arc::clone(&self.sync_shared), peer, state).fetch()
{
for item in fetch {
BlockFetchCMD::send_getblocks(item, &self.p2p_control, peer);
}
}
}
}
CanStart::MinWorkNotReach => {
let best_known = self.sync_shared.state().shared_best_header_ref();
let number = best_known.number();
if number != self.number && (number - self.number) % 10000 == 0 {
self.number = number;
info!(
"best known header number: {}, total difficulty: {:#x}, \
require min header number on 500_000, min total difficulty: {:#x}, \
then start to download block",
number,
best_known.total_difficulty(),
self.sync_shared.state().min_chain_work()
);
}
}
CanStart::AssumeValidNotFound => {
let state = self.sync_shared.state();
let best_known = state.shared_best_header_ref();
let number = best_known.number();
let assume_valid_target: Byte32 = state
.assume_valid_target()
.as_ref()
.map(Pack::pack)
.expect("assume valid target must exist");
if number != self.number && (number - self.number) % 10000 == 0 {
self.number = number;
info!(
"best known header number: {}, hash: {:#?}, \
can't find assume valid target temporarily, hash: {:#?} \
please wait",
number,
best_known.hash(),
assume_valid_target
);
}
}
},
}
}
fn run(&mut self, stop_signal: Receiver<()>) {
loop {
select! {
recv(self.recv) -> msg => {
if let Ok(cmd) = msg {
self.process_fetch_cmd(cmd)
}
}
recv(stop_signal) -> _ => {
debug!("thread BlockDownload received exit signal, exit now");
return;
}
}
}
}
fn can_start(&mut self) -> CanStart {
if let CanStart::Ready = self.can_start {
return self.can_start;
}
let state = self.sync_shared.state();
let min_work_reach = |flag: &mut CanStart| {
if state.min_chain_work_ready() {
*flag = CanStart::AssumeValidNotFound;
}
};
let assume_valid_target_find = |flag: &mut CanStart| {
let mut assume_valid_target = state.assume_valid_target();
if let Some(ref target) = *assume_valid_target {
match state.header_map().get(&target.pack()) {
Some(header) => {
*flag = CanStart::Ready;
// Blocks that are no longer in the scope of ibd must be forced to verify
if unix_time_as_millis().saturating_sub(header.timestamp()) < MAX_TIP_AGE {
assume_valid_target.take();
}
}
None => {
// Best known already not in the scope of ibd, it means target is invalid
if unix_time_as_millis()
.saturating_sub(state.shared_best_header_ref().timestamp())
< MAX_TIP_AGE
{
*flag = CanStart::Ready;
assume_valid_target.take();
}
}
}
} else {
*flag = CanStart::Ready;
}
};
match self.can_start {
CanStart::Ready => self.can_start,
CanStart::MinWorkNotReach => {
min_work_reach(&mut self.can_start);
if let CanStart::AssumeValidNotFound = self.can_start {
assume_valid_target_find(&mut self.can_start);
}
self.can_start
}
CanStart::AssumeValidNotFound => {
assume_valid_target_find(&mut self.can_start);
self.can_start
}
}
}
fn send_getblocks(v_fetch: Vec<packed::Byte32>, nc: &ServiceControl, peer: PeerIndex) {
let content = packed::GetBlocks::new_builder()
.block_hashes(v_fetch.clone().pack())
.build();
let message = packed::SyncMessage::new_builder().set(content).build();
debug!("send_getblocks len={:?} to peer={}", v_fetch.len(), peer);
if let Err(err) = nc.send_message_to(
peer,
SupportProtocols::Sync.protocol_id(),
message.as_bytes(),
) {
debug!("synchronizer send GetBlocks error: {:?}", err);
}
}
}
/// Sync protocol handle
pub struct Synchronizer {
pub(crate) chain: ChainController,
/// Sync shared state
pub shared: Arc<SyncShared>,
fetch_channel: Option<channel::Sender<FetchCMD>>,
}
impl Synchronizer {
/// Init sync protocol handle
///
/// This is a runtime sync protocol shared state, and any Sync protocol messages will be processed and forwarded by it
pub fn new(chain: ChainController, shared: Arc<SyncShared>) -> Synchronizer {
Synchronizer {
chain,
shared,
fetch_channel: None,
}
}
/// Get shared state
pub fn shared(&self) -> &Arc<SyncShared> {
&self.shared
}
fn try_process(
&self,
nc: &dyn CKBProtocolContext,
peer: PeerIndex,
message: packed::SyncMessageUnionReader<'_>,
) -> Status {
match message {
packed::SyncMessageUnionReader::GetHeaders(reader) => {
GetHeadersProcess::new(reader, self, peer, nc).execute()
}
packed::SyncMessageUnionReader::SendHeaders(reader) => {
HeadersProcess::new(reader, self, peer, nc).execute()
}
packed::SyncMessageUnionReader::GetBlocks(reader) => {
GetBlocksProcess::new(reader, self, peer, nc).execute()
}
packed::SyncMessageUnionReader::SendBlock(reader) => {
if reader.check_data() {
BlockProcess::new(reader, self, peer).execute()
} else {
StatusCode::ProtocolMessageIsMalformed.with_context("SendBlock is invalid")
}
}
packed::SyncMessageUnionReader::InIBD(_) => InIBDProcess::new(self, peer, nc).execute(),
}
}
fn process(
&self,
nc: &dyn CKBProtocolContext,
peer: PeerIndex,
message: packed::SyncMessageUnionReader<'_>,
) {
let item_name = message.item_name();
let item_bytes = message.as_slice().len() as u64;
let status = self.try_process(nc, peer, message);
metric_ckb_message_bytes(
MetricDirection::In,
&SupportProtocols::Sync.name(),
item_name,
Some(status.code()),
item_bytes,
);
if let Some(ban_time) = status.should_ban() {
error!(
"receive {} from {}, ban {:?} for {}",
item_name, peer, ban_time, status
);
nc.ban_peer(peer, ban_time, status.to_string());
} else if status.should_warn() {
warn!("receive {} from {}, {}", item_name, peer, status);
} else if !status.is_ok() {
debug!("receive {} from {}, {}", item_name, peer, status);
}
}
/// Get peers info
pub fn peers(&self) -> &Peers {
self.shared().state().peers()
}
fn better_tip_header(&self) -> HeaderIndexView {
let (header, total_difficulty) = {
let active_chain = self.shared.active_chain();
(
active_chain.tip_header(),
active_chain.total_difficulty().to_owned(),
)
};
let best_known = self.shared.state().shared_best_header();
// is_better_chain
if total_difficulty > *best_known.total_difficulty() {
(header, total_difficulty).into()
} else {
best_known
}
}
/// Process a new block sync from other peer
//TODO: process block which we don't request
pub fn process_new_block(&self, block: core::BlockView) -> Result<bool, CKBError> {
let block_hash = block.hash();
let status = self.shared.active_chain().get_block_status(&block_hash);
// NOTE: Filtering `BLOCK_STORED` but not `BLOCK_RECEIVED`, is for avoiding
// stopping synchronization even when orphan_pool maintains dirty items by bugs.
if status.contains(BlockStatus::BLOCK_STORED) {
debug!("block {} already stored", block_hash);
Ok(false)
} else if status.contains(BlockStatus::HEADER_VALID) {
self.shared.insert_new_block(&self.chain, Arc::new(block))
} else {
debug!(
"Synchronizer process_new_block unexpected status {:?} {}",
status, block_hash,
);
// TODO which error should we return?
Ok(false)
}
}
/// Get blocks to fetch
pub fn get_blocks_to_fetch(
&self,
peer: PeerIndex,
ibd: IBDState,
) -> Option<Vec<Vec<packed::Byte32>>> {
BlockFetcher::new(Arc::to_owned(self.shared()), peer, ibd).fetch()
}
pub(crate) fn on_connected(&self, nc: &dyn CKBProtocolContext, peer: PeerIndex) {
let pid = SupportProtocols::Sync.protocol_id();
let (is_outbound, is_whitelist, is_2023edition) = nc
.get_peer(peer)
.map(|peer| {
(
peer.is_outbound(),
peer.is_whitelist,
peer.protocols.get(&pid).map(|v| v == "3").unwrap_or(false),
)
})
.unwrap_or((false, false, false));
self.peers()
.sync_connected(peer, is_outbound, is_whitelist, is_2023edition);
}
/// Regularly check and eject some nodes that do not respond in time
// - If at timeout their best known block now has more work than our tip
// when the timeout was set, then either reset the timeout or clear it
// (after comparing against our current tip's work)
// - If at timeout their best known block still has less work than our
// tip did when the timeout was set, then send a getheaders message,
// and set a shorter timeout, HEADERS_RESPONSE_TIME seconds in future.
// If their best known block is still behind when that new timeout is
// reached, disconnect.
pub fn eviction(&self, nc: &dyn CKBProtocolContext) {
let active_chain = self.shared.active_chain();
let mut eviction = Vec::new();
let better_tip_header = self.better_tip_header();
for mut kv_pair in self.peers().state.iter_mut() {
let (peer, state) = kv_pair.pair_mut();
let now = unix_time_as_millis();
if let Some(ref mut controller) = state.headers_sync_controller {
let better_tip_ts = better_tip_header.timestamp();
if let Some(is_timeout) = controller.is_timeout(better_tip_ts, now) {
if is_timeout {
eviction.push(*peer);
continue;
}
} else {
active_chain.send_getheaders_to_peer(
nc,
*peer,
better_tip_header.number_and_hash(),
);
}
}
// On ibd, node should only have one peer to sync headers, and it's state can control by
// headers_sync_controller.
//
// The header sync of other nodes does not matter in the ibd phase, and parallel synchronization
// can be enabled by unknown list, so there is no need to repeatedly download headers with
// multiple nodes at the same time.
if active_chain.is_initial_block_download() {
continue;
}
if state.peer_flags.is_outbound {
let best_known_header = state.best_known_header.as_ref();
let (tip_header, local_total_difficulty) = {
(
active_chain.tip_header().to_owned(),
active_chain.total_difficulty().to_owned(),
)
};
if best_known_header
.map(|header_index| header_index.total_difficulty().clone())
.unwrap_or_default()
>= local_total_difficulty
{
if state.chain_sync.timeout != 0 {
state.chain_sync.timeout = 0;
state.chain_sync.work_header = None;
state.chain_sync.total_difficulty = None;
state.chain_sync.sent_getheaders = false;
}
} else if state.chain_sync.timeout == 0
|| (best_known_header.is_some()
&& best_known_header
.map(|header_index| header_index.total_difficulty().clone())
>= state.chain_sync.total_difficulty)
{
// Our best block known by this peer is behind our tip, and we're either noticing
// that for the first time, OR this peer was able to catch up to some earlier point
// where we checked against our tip.
// Either way, set a new timeout based on current tip.
state.chain_sync.timeout = now + CHAIN_SYNC_TIMEOUT;
state.chain_sync.work_header = Some(tip_header);
state.chain_sync.total_difficulty = Some(local_total_difficulty);
state.chain_sync.sent_getheaders = false;
} else if state.chain_sync.timeout > 0 && now > state.chain_sync.timeout {
// No evidence yet that our peer has synced to a chain with work equal to that
// of our tip, when we first detected it was behind. Send a single getheaders
// message to give the peer a chance to update us.
if state.chain_sync.sent_getheaders {
if state.peer_flags.is_protect || state.peer_flags.is_whitelist {
if state.sync_started() {
self.shared().state().suspend_sync(state);
}
} else {
eviction.push(*peer);
}
} else {
state.chain_sync.sent_getheaders = true;
state.chain_sync.timeout = now + EVICTION_HEADERS_RESPONSE_TIME;
active_chain.send_getheaders_to_peer(
nc,
*peer,
state
.chain_sync
.work_header
.as_ref()
.expect("work_header be assigned")
.into(),
);
}
}
}
}
for peer in eviction {
info!("timeout eviction peer={}", peer);
if let Err(err) = nc.disconnect(peer, "sync timeout eviction") {
debug!("synchronizer disconnect error: {:?}", err);
}
}
}
fn start_sync_headers(&self, nc: &dyn CKBProtocolContext) {
let now = unix_time_as_millis();
let active_chain = self.shared.active_chain();
let ibd = active_chain.is_initial_block_download();
let peers: Vec<PeerIndex> = self
.peers()
.state
.iter()
.filter(|kv_pair| kv_pair.value().can_start_sync(now, ibd))
.map(|kv_pair| *kv_pair.key())
.collect();
if peers.is_empty() {
return;
}
let tip = self.better_tip_header();
for peer in peers {
// Only sync with 1 peer if we're in IBD
if self
.shared()
.state()
.n_sync_started()
.fetch_update(Ordering::AcqRel, Ordering::Acquire, |x| {
if ibd && x != 0 {
None
} else {
Some(x + 1)
}
})
.is_err()
{
break;
}
{
if let Some(mut peer_state) = self.peers().state.get_mut(&peer) {
peer_state.start_sync(HeadersSyncController::from_header(&tip));
}
}
debug!("start sync peer={}", peer);
active_chain.send_getheaders_to_peer(nc, peer, tip.number_and_hash());
}
}
fn get_peers_to_fetch(
&self,
ibd: IBDState,
disconnect_list: &HashSet<PeerIndex>,
) -> Vec<PeerIndex> {
trace!("poll find_blocks_to_fetch select peers");
let state = &self
.shared
.state()
.read_inflight_blocks()
.download_schedulers;
let mut peers: Vec<PeerIndex> = self
.peers()
.state
.iter()
.filter(|kv_pair| {
let (id, state) = kv_pair.pair();
if disconnect_list.contains(id) {
return false;
};
match ibd {
IBDState::In => {
state.peer_flags.is_outbound
|| state.peer_flags.is_whitelist
|| state.peer_flags.is_protect
}
IBDState::Out => state.started_or_tip_synced(),
}
})
.map(|kv_pair| *kv_pair.key())
.collect();
peers.sort_by_key(|id| {
::std::cmp::Reverse(
state
.get(id)
.map_or(INIT_BLOCKS_IN_TRANSIT_PER_PEER, |d| d.task_count()),
)
});
peers
}
fn find_blocks_to_fetch(&mut self, nc: &dyn CKBProtocolContext, ibd: IBDState) {
let tip = self.shared.active_chain().tip_number();
let disconnect_list = {
let mut list = self.shared().state().write_inflight_blocks().prune(tip);
if let IBDState::In = ibd {
// best known < tip and in IBD state, and unknown list is empty,
// these node can be disconnect
list.extend(
self.shared
.state()
.peers()
.get_best_known_less_than_tip_and_unknown_empty(tip),
)
};
list
};
for peer in disconnect_list.iter() {
// It is not forbidden to evict protected nodes:
// - First of all, this node is not designated by the user for protection,
// but is connected randomly. It does not represent the will of the user
// - Secondly, in the synchronization phase, the nodes with zero download tasks are
// retained, apart from reducing the download efficiency, there is no benefit.
if self
.peers()
.get_flag(*peer)
.map(|flag| flag.is_whitelist)
.unwrap_or(false)
{
continue;
}
if let Err(err) = nc.disconnect(*peer, "sync disconnect") {
debug!("synchronizer disconnect error: {:?}", err);
}
}
// fetch use a lot of cpu time, especially in ibd state
// so, the fetch function use another thread
match nc.p2p_control() {
Some(raw) => match self.fetch_channel {
Some(ref sender) => {
if !sender.is_full() {
let peers = self.get_peers_to_fetch(ibd, &disconnect_list);
let _ignore = sender.try_send(FetchCMD::Fetch((peers, ibd)));
}
}
None => {
let p2p_control = raw.clone();
let (sender, recv) = channel::bounded(2);
let peers = self.get_peers_to_fetch(ibd, &disconnect_list);
sender.send(FetchCMD::Fetch((peers, ibd))).unwrap();
self.fetch_channel = Some(sender);
let thread = ::std::thread::Builder::new();
let number = self.shared.state().shared_best_header_ref().number();
const THREAD_NAME: &str = "BlockDownload";
let sync_shared: Arc<SyncShared> = Arc::to_owned(self.shared());
let blockdownload_jh = thread
.name(THREAD_NAME.into())
.spawn(move || {
let stop_signal = new_crossbeam_exit_rx();
BlockFetchCMD {
sync_shared,
p2p_control,
recv,
number,
can_start: CanStart::MinWorkNotReach,
}
.run(stop_signal);
})
.expect("download thread can't start");
register_thread(THREAD_NAME, blockdownload_jh);
}
},
None => {
for peer in self.get_peers_to_fetch(ibd, &disconnect_list) {
if let Some(fetch) = self.get_blocks_to_fetch(peer, ibd) {
for item in fetch {
self.send_getblocks(item, nc, peer);
}
}
}
}
}
}
fn send_getblocks(
&self,
v_fetch: Vec<packed::Byte32>,
nc: &dyn CKBProtocolContext,
peer: PeerIndex,
) {
let content = packed::GetBlocks::new_builder()
.block_hashes(v_fetch.clone().pack())
.build();
let message = packed::SyncMessage::new_builder().set(content).build();
debug!("send_getblocks len={:?} to peer={}", v_fetch.len(), peer);
let _status = send_message_to(nc, peer, &message);
}
}
#[async_trait]
impl CKBProtocolHandler for Synchronizer {
async fn init(&mut self, nc: Arc<dyn CKBProtocolContext + Sync>) {
// NOTE: 100ms is what bitcoin use.
nc.set_notify(SYNC_NOTIFY_INTERVAL, SEND_GET_HEADERS_TOKEN)
.await
.expect("set_notify at init is ok");
nc.set_notify(SYNC_NOTIFY_INTERVAL, TIMEOUT_EVICTION_TOKEN)
.await
.expect("set_notify at init is ok");
nc.set_notify(IBD_BLOCK_FETCH_INTERVAL, IBD_BLOCK_FETCH_TOKEN)
.await
.expect("set_notify at init is ok");
nc.set_notify(NOT_IBD_BLOCK_FETCH_INTERVAL, NOT_IBD_BLOCK_FETCH_TOKEN)
.await
.expect("set_notify at init is ok");
nc.set_notify(Duration::from_secs(2), NO_PEER_CHECK_TOKEN)
.await
.expect("set_notify at init is ok");
}
async fn received(
&mut self,
nc: Arc<dyn CKBProtocolContext + Sync>,
peer_index: PeerIndex,
data: Bytes,
) {
let msg = match packed::SyncMessageReader::from_compatible_slice(&data) {
Ok(msg) => {
let item = msg.to_enum();
if let packed::SyncMessageUnionReader::SendBlock(ref reader) = item {
if reader.count_extra_fields() > 1 {
info!(
"Peer {} sends us a malformed message: \
too many fields in SendBlock",
peer_index
);
nc.ban_peer(
peer_index,
BAD_MESSAGE_BAN_TIME,
String::from(
"send us a malformed message: \
too many fields in SendBlock",
),
);
return;
} else {
item
}
} else {
match packed::SyncMessageReader::from_slice(&data) {
Ok(msg) => msg.to_enum(),
_ => {
info!(
"Peer {} sends us a malformed message: \
too many fields",
peer_index
);
nc.ban_peer(
peer_index,
BAD_MESSAGE_BAN_TIME,
String::from(
"send us a malformed message: \
too many fields",
),
);
return;
}
}
}
}
_ => {
info!("Peer {} sends us a malformed message", peer_index);
nc.ban_peer(
peer_index,
BAD_MESSAGE_BAN_TIME,
String::from("send us a malformed message"),
);
return;
}
};
debug!("received msg {} from {}", msg.item_name(), peer_index);
#[cfg(feature = "with_sentry")]
{
let sentry_hub = sentry::Hub::current();
let _scope_guard = sentry_hub.push_scope();
sentry_hub.configure_scope(|scope| {
scope.set_tag("p2p.protocol", "synchronizer");
scope.set_tag("p2p.message", msg.item_name());
});
}
let start_time = Instant::now();
tokio::task::block_in_place(|| self.process(nc.as_ref(), peer_index, msg));
debug!(
"process message={}, peer={}, cost={:?}",
msg.item_name(),
peer_index,
Instant::now().saturating_duration_since(start_time),
);
}
async fn connected(
&mut self,
nc: Arc<dyn CKBProtocolContext + Sync>,
peer_index: PeerIndex,
_version: &str,
) {
info!("SyncProtocol.connected peer={}", peer_index);
self.on_connected(nc.as_ref(), peer_index);
}
async fn disconnected(
&mut self,
_nc: Arc<dyn CKBProtocolContext + Sync>,
peer_index: PeerIndex,
) {
let sync_state = self.shared().state();
sync_state.disconnected(peer_index);
}
async fn notify(&mut self, nc: Arc<dyn CKBProtocolContext + Sync>, token: u64) {
if !self.peers().state.is_empty() {
let start_time = Instant::now();
trace!("start notify token={}", token);
match token {
SEND_GET_HEADERS_TOKEN => {
self.start_sync_headers(nc.as_ref());
}
IBD_BLOCK_FETCH_TOKEN => {
if self.shared.active_chain().is_initial_block_download() {
self.find_blocks_to_fetch(nc.as_ref(), IBDState::In);
} else {
{
self.shared.state().write_inflight_blocks().adjustment = false;
}
self.shared.state().peers().clear_unknown_list();
if nc.remove_notify(IBD_BLOCK_FETCH_TOKEN).await.is_err() {
trace!("remove ibd block fetch fail");
}
}
}
NOT_IBD_BLOCK_FETCH_TOKEN => {
if !self.shared.active_chain().is_initial_block_download() {
self.find_blocks_to_fetch(nc.as_ref(), IBDState::Out);
}
}
TIMEOUT_EVICTION_TOKEN => {
self.eviction(nc.as_ref());
}
// Here is just for NO_PEER_CHECK_TOKEN token, only handle it when there is no peer.
_ => {}
}
trace!(
"finished notify token={} cost={:?}",
token,
Instant::now().saturating_duration_since(start_time)
);
} else if token == NO_PEER_CHECK_TOKEN {
debug!("no peers connected");
}
}
}