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//! Main node run loop: block processing, network message poll, health and disk checks.
use anyhow::Result;
use std::sync::Arc;
use tracing::{debug, info, warn};
use crate::utils::{HANDSHAKE_POLL_SLEEP, log_error, with_custom_timeout};
/// Main node run loop. Called from `Node::start()` after components are started.
pub(crate) async fn run(node: &mut super::Node) -> Result<()> {
// Subscribe before any slow startup work so SIGTERM is not missed.
let mut shutdown_rx = crate::utils::create_shutdown_receiver();
if *shutdown_rx.borrow() {
info!("Shutdown already requested before run loop started");
return Ok(());
}
info!("Node running - main loop started");
// `current_height` is the height of the next block to connect (chain tip + 1).
let chain_tip = node.storage.chain().get_height()?.unwrap_or(0);
let mut current_height = chain_tip.saturating_add(1);
// Full UTXO load can take minutes at mainnet scale and blocks shutdown; P2P relay
// validation reloads from disk as needed. Catch-up sync uses parallel IBD + disk store.
let mut utxo_set = if chain_tip == 0 {
node.storage.utxos().get_all_utxos().unwrap_or_default()
} else {
Default::default()
};
node.network.replace_utxo_snapshot(utxo_set.clone()).await;
// Catch up immediately if peers are ahead (do not wait for the periodic check).
if let Err(e) = node.try_catch_up_ibd(&mut utxo_set).await {
warn!("Catch-up sync check failed: {}", e);
}
if let Ok(Some(h)) = node.storage.chain().get_height() {
current_height = h.saturating_add(1);
}
// Main node loop - coordinates between all components and handles shutdown signals
let mut loop_counter: u64 = 0;
loop {
// Check for shutdown signal (non-blocking)
if *shutdown_rx.borrow() {
info!("Shutdown signal received, stopping node gracefully...");
break;
}
// Process any received blocks (non-blocking)
while let Some(block_data) = node.network.try_recv_block() {
if let Ok(Some(h)) = node.storage.chain().get_height() {
current_height = h.saturating_add(1);
}
info!("Processing block from network");
let blocks_arc = node.storage.blocks();
// Parse block to get hash for event publishing
use crate::node::block_processor::parse_block_from_wire;
let block_hash_for_validation =
if let Ok((block, _)) = parse_block_from_wire(&block_data) {
use crate::storage::blockstore::BlockStore;
blocks_arc.get_block_hash(&block)
} else {
[0u8; 32]
};
// Publish block validation started event
if let Some(event_publisher) = node
.module_subsystem
.as_ref()
.and_then(|s| s.event_publisher.as_ref())
{
event_publisher
.publish_block_validation_started(&block_hash_for_validation, current_height)
.await;
}
let validation_start_time = std::time::Instant::now();
let prev_tip_header_bits = node
.storage
.chain()
.get_tip_header()
.ok()
.flatten()
.map(|h| h.bits)
.unwrap_or(0);
let prev_tip = node.storage.chain().get_tip_hash_and_height().ok();
match node.sync_coordinator.process_block(
&blocks_arc,
&node.protocol,
Some(&node.storage),
&block_data,
current_height,
&mut utxo_set,
Some(Arc::clone(&node.metrics)),
Some(Arc::clone(&node.profiler)),
) {
Ok(true) => {
info!("Block accepted at height {}", current_height);
let validation_time_ms = validation_start_time.elapsed().as_millis() as u64;
let tip_changed = node
.storage
.chain()
.get_tip_hash_and_height()
.ok()
.zip(prev_tip.as_ref())
.is_some_and(|((new_tip, new_h), (old_tip, old_h))| {
new_tip != *old_tip || new_h != *old_h
});
// Publish block validation completed event (success)
if let Some(event_publisher) = node
.module_subsystem
.as_ref()
.and_then(|s| s.event_publisher.as_ref())
{
event_publisher
.publish_block_validation_completed(
&block_hash_for_validation,
current_height,
true,
validation_time_ms,
None,
)
.await;
}
if tip_changed {
let blocks_arc = node.storage.blocks();
let (block_hash, tip_height) = node
.storage
.chain()
.get_tip_hash_and_height()
.unwrap_or(([0u8; 32], current_height));
if let Ok(Some(block)) = blocks_arc.get_block(&block_hash) {
if block.header.bits != prev_tip_header_bits {
if let Some(ep) = node
.module_subsystem
.as_ref()
.and_then(|s| s.event_publisher.as_ref())
{
ep.publish_mining_difficulty_changed(
prev_tip_header_bits as u32,
block.header.bits as u32,
tip_height,
)
.await;
}
}
let transaction_count =
node.storage.transaction_count().unwrap_or(0) as u64;
log_error(
|| {
node.storage.chain().update_utxo_stats_cache(
&block_hash,
tip_height,
&utxo_set,
transaction_count,
)
},
"Failed to update UTXO stats cache",
);
log_error(
|| {
node.storage.chain().calculate_and_cache_network_hashrate(
tip_height,
&blocks_arc,
)
},
"Failed to update network hashrate cache",
);
if let Some(event_publisher) = node
.module_subsystem
.as_ref()
.and_then(|s| s.event_publisher.as_ref())
{
event_publisher
.publish_new_block(&block, &block_hash, tip_height)
.await;
}
if let Err(e) = node.storage.utxos().store_utxo_set(&utxo_set) {
warn!(
"Failed to persist UTXO set after block {}: {}",
tip_height, e
);
}
node.network.replace_utxo_snapshot(utxo_set.clone()).await;
#[cfg(feature = "utxo-commitments")]
{
if let Some(pruning_manager) = node.storage.pruning() {
if let (Some(commitment_store), Some(_utxostore)) = (
pruning_manager.commitment_store(),
pruning_manager.utxostore(),
) {
if let Err(e) = pruning_manager
.generate_commitment_from_current_state(
&block_hash,
tip_height,
&utxo_set,
&commitment_store,
)
{
warn!(
"Failed to generate commitment for block {}: {}",
tip_height, e
);
} else {
debug!(
"Generated UTXO commitment for block {}",
tip_height
);
}
}
}
}
current_height = tip_height + 1;
} else {
warn!("Failed to load block at active tip height {tip_height}");
}
}
// Check for incremental pruning during IBD
// Consider IBD if we're still syncing (height < tip or no recent blocks)
let is_ibd = current_height < 1000; // Simple heuristic: consider IBD if < 1000 blocks
if let Some(pruning_manager) = node.storage.pruning() {
if let Ok(Some(prune_stats)) =
pruning_manager.incremental_prune_during_ibd(current_height, is_ibd)
{
info!(
"Incremental pruning during IBD: {} blocks pruned, {} bytes freed",
prune_stats.blocks_pruned, prune_stats.storage_freed
);
// Flush storage to persist pruning changes
if let Err(e) = node.storage.flush() {
warn!("Failed to flush storage after incremental pruning: {}", e);
}
}
}
// Check for automatic pruning after block acceptance
if let Some(pruning_manager) = node.storage.pruning() {
let stats = pruning_manager.get_stats();
let should_prune = pruning_manager
.should_auto_prune(current_height, stats.last_prune_height);
if should_prune {
info!("Automatic pruning triggered at height {}", current_height);
// Calculate prune height based on configuration
let prune_height = match &pruning_manager.config.mode {
crate::config::PruningMode::Disabled => None,
crate::config::PruningMode::Normal {
keep_from_height, ..
} => {
// Prune to keep_from_height, but ensure we keep min_blocks
let min_keep = pruning_manager.config.min_blocks_to_keep;
let effective_keep = (*keep_from_height)
.max(current_height.saturating_sub(min_keep));
Some(effective_keep)
}
#[cfg(feature = "utxo-commitments")]
crate::config::PruningMode::Aggressive {
keep_from_height,
min_blocks,
..
} => {
// Prune to keep_from_height, respecting min_blocks
let sub = current_height.saturating_sub(*min_blocks);
let effective_keep = (*keep_from_height).max(sub);
Some(effective_keep)
}
#[cfg(not(feature = "utxo-commitments"))]
crate::config::PruningMode::Aggressive { .. } => {
// Aggressive pruning requires utxo-commitments feature
// Fall back to no pruning if feature is disabled
None
}
crate::config::PruningMode::Custom {
keep_bodies_from_height,
..
} => {
// Prune to keep_bodies_from_height, respecting min_blocks
let min_keep = pruning_manager.config.min_blocks_to_keep;
let effective_keep = (*keep_bodies_from_height)
.max(current_height.saturating_sub(min_keep));
Some(effective_keep)
}
};
if let Some(prune_to_height) = prune_height {
if prune_to_height < current_height {
match pruning_manager.prune_to_height(
prune_to_height,
current_height,
false,
) {
Ok(prune_stats) => {
info!(
"Automatic pruning completed: {} blocks pruned, {} blocks kept",
prune_stats.blocks_pruned, prune_stats.blocks_kept
);
// Flush storage to persist pruning changes
use crate::utils::log_error;
log_error(
|| node.storage.flush(),
"Failed to flush storage after automatic pruning",
);
}
Err(e) => {
warn!("Automatic pruning failed: {}", e);
}
}
}
}
}
}
}
Ok(false) => {
warn!("Block rejected at height {}", current_height);
if let Err(e) = node.try_catch_up_ibd(&mut utxo_set).await {
warn!("Catch-up after block rejection failed: {}", e);
}
if let Ok(Some(h)) = node.storage.chain().get_height() {
current_height = h.saturating_add(1);
}
let validation_time_ms = validation_start_time.elapsed().as_millis() as u64;
// Publish block validation completed event (failure)
if let Some(event_publisher) = node
.module_subsystem
.as_ref()
.and_then(|s| s.event_publisher.as_ref())
{
event_publisher
.publish_block_validation_completed(
&block_hash_for_validation,
current_height,
false,
validation_time_ms,
Some("Block validation failed"),
)
.await;
}
}
Err(e) => {
warn!("Error processing block: {}", e);
let validation_time_ms = validation_start_time.elapsed().as_millis() as u64;
// Publish block validation completed event (error)
if let Some(event_publisher) = node
.module_subsystem
.as_ref()
.and_then(|s| s.event_publisher.as_ref())
{
event_publisher
.publish_block_validation_completed(
&block_hash_for_validation,
current_height,
false,
validation_time_ms,
Some(&format!("Block processing error: {e}")),
)
.await;
}
}
}
}
// Peer traffic is drained by the background task spawned in start_components
// (`NetworkManager::process_messages`). Do not call it here: it never returns until
// the channel closes, which would starve this loop and leave `pending_blocks` undrained.
tokio::select! {
biased;
Ok(()) = shutdown_rx.changed() => {
if *shutdown_rx.borrow() {
info!("Shutdown signal received, stopping node gracefully...");
break;
}
}
_ = tokio::time::sleep(HANDSHAKE_POLL_SLEEP) => {}
}
loop_counter = loop_counter.saturating_add(1);
// Peers advance the tip while we idle; re-check every ~5s and resume parallel IBD when behind.
if loop_counter % 50 == 0 {
if let Err(e) = node.try_catch_up_ibd(&mut utxo_set).await {
warn!("Catch-up sync check failed: {}", e);
}
if let Ok(Some(h)) = node.storage.chain().get_height() {
current_height = h.saturating_add(1);
}
}
// Check node health periodically
node.check_health().await?;
// Check disk space periodically (every 10 iterations = ~1 second)
// Use timeout to prevent hanging on slow disk operations
let counter = node
.disk_check_counter
.fetch_add(1, std::sync::atomic::Ordering::Relaxed);
if counter % 10 == 0 {
let timeout_dur = node.storage_timeout();
use crate::utils::with_custom_timeout;
match with_custom_timeout(async { node.check_disk_space().await }, timeout_dur).await {
Ok(Ok(())) => {
// Disk check succeeded
}
Ok(Err(e)) => {
warn!("Disk space check failed: {}", e);
// Continue - disk errors don't stop the node
}
Err(_) => {
warn!("Disk space check timed out");
// Continue - timeout doesn't stop the node
}
}
}
}
// Graceful shutdown - stop all components
info!("Initiating graceful shutdown...");
node.stop().await?;
Ok(())
}