openethereum/sync/src/chain.rs

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// Copyright 2015, 2016 Ethcore (UK) Ltd.
// This file is part of Parity.
// Parity 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.
// Parity 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 Parity. If not, see <http://www.gnu.org/licenses/>.
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///
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/// `BlockChain` synchronization strategy.
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/// Syncs to peers and keeps up to date.
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/// This implementation uses ethereum protocol v63
///
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/// Syncing strategy summary.
/// Split the chain into ranges of N blocks each. Download ranges sequentially. Split each range into subchains of M blocks. Download subchains in parallel.
/// State.
/// Sync state consists of the following data:
/// - s: State enum which can be one of the following values: `ChainHead`, `Blocks`, `Idle`
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/// - H: A set of downloaded block headers
/// - B: A set of downloaded block bodies
/// - S: Set of block subchain start block hashes to download.
/// - l: Last imported / common block hash
/// - P: A set of connected peers. For each peer we maintain its last known total difficulty and starting block hash being requested if any.
/// General behaviour.
/// We start with all sets empty, l is set to the best block in the block chain, s is set to `ChainHead`.
/// If at any moment a bad block is reported by the block queue, we set s to `ChainHead`, reset l to the best block in the block chain and clear H, B and S.
/// If at any moment P becomes empty, we set s to `ChainHead`, and clear H, B and S.
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///
/// Workflow for `ChainHead` state.
/// In this state we try to get subchain headers with a single `GetBlockHeaders` request.
/// On `NewPeer` / On `Restart`:
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/// If peer's total difficulty is higher, request N/M headers with interval M+1 starting from l
/// On `BlockHeaders(R)`:
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/// If R is empty:
/// If l is equal to genesis block hash or l is more than 1000 blocks behind our best hash:
/// Remove current peer from P. set l to the best block in the block chain. Select peer with maximum total difficulty from P and restart.
/// Else
/// Set l to ls parent and restart.
/// Else if we already have all the headers in the block chain or the block queue:
/// Set s to `Idle`,
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/// Else
/// Set S to R, set s to `Blocks`.
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///
///
/// All other messages are ignored.
/// Workflow for `Blocks` state.
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/// In this state we download block headers and bodies from multiple peers.
/// On `NewPeer` / On `Restart`:
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/// For all idle peers:
/// Find a set of 256 or less block hashes in H which are not in B and not being downloaded by other peers. If the set is not empty:
/// Request block bodies for the hashes in the set.
/// Else
/// Find an element in S which is not being downloaded by other peers. If found: Request M headers starting from the element.
///
/// On `BlockHeaders(R)`:
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/// If R is empty remove current peer from P and restart.
/// Validate received headers. For each header find a parent in H or R or the blockchain. Restart if there is a block with unknown parent.
/// Go to `CollectBlocks`.
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///
/// On `BlockBodies(R)`:
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/// If R is empty remove current peer from P and restart.
/// Add bodies with a matching header in H to B.
/// Go to `CollectBlocks`.
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///
/// `CollectBlocks`:
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/// Find a chain of blocks C in H starting from h where hs parent equals to l. The chain ends with the first block which does not have a body in B.
/// Add all blocks from the chain to the block queue. Remove them from H and B. Set l to the hash of the last block from C.
/// Update and merge subchain heads in S. For each h in S find a chain of blocks in B starting from h. Remove h from S. if the chain does not include an element from S add the end of the chain to S.
/// If H is empty and S contains a single element set s to `ChainHead`.
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/// Restart.
///
/// All other messages are ignored.
/// Workflow for Idle state.
/// On `NewBlock`:
/// Import the block. If the block is unknown set s to `ChainHead` and restart.
/// On `NewHashes`:
/// Set s to `ChainHead` and restart.
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///
/// All other messages are ignored.
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///
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use util::*;
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use rlp::*;
use network::*;
use ethcore::views::{HeaderView};
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use ethcore::header::{BlockNumber, Header as BlockHeader};
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use ethcore::client::{BlockChainClient, BlockStatus, BlockID, BlockChainInfo, BlockImportError};
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use ethcore::error::*;
use ethcore::snapshot::{ManifestData, RestorationStatus};
use sync_io::SyncIo;
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use time;
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use super::SyncConfig;
use block_sync::{BlockDownloader, BlockRequest, BlockDownloaderImportError as DownloaderImportError};
use snapshot::{Snapshot, ChunkType};
use rand::{thread_rng, Rng};
use api::{PeerInfo as PeerInfoDigest, WARP_SYNC_PROTOCOL_ID};
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known_heap_size!(0, PeerInfo);
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type PacketDecodeError = DecoderError;
const PROTOCOL_VERSION_63: u8 = 63;
const PROTOCOL_VERSION_1: u8 = 1;
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const MAX_BODIES_TO_SEND: usize = 256;
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const MAX_HEADERS_TO_SEND: usize = 512;
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const MAX_NODE_DATA_TO_SEND: usize = 1024;
const MAX_RECEIPTS_TO_SEND: usize = 1024;
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const MAX_RECEIPTS_HEADERS_TO_SEND: usize = 256;
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const MIN_PEERS_PROPAGATION: usize = 4;
const MAX_PEERS_PROPAGATION: usize = 128;
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const MAX_PEER_LAG_PROPAGATION: BlockNumber = 20;
const MAX_NEW_HASHES: usize = 64;
const MAX_TX_TO_IMPORT: usize = 512;
const MAX_NEW_BLOCK_AGE: BlockNumber = 20;
const MAX_TRANSACTION_SIZE: usize = 300*1024;
// Min number of blocks to be behind for a snapshot sync
const SNAPSHOT_RESTORE_THRESHOLD: BlockNumber = 100000;
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const STATUS_PACKET: u8 = 0x00;
const NEW_BLOCK_HASHES_PACKET: u8 = 0x01;
const TRANSACTIONS_PACKET: u8 = 0x02;
const GET_BLOCK_HEADERS_PACKET: u8 = 0x03;
const BLOCK_HEADERS_PACKET: u8 = 0x04;
const GET_BLOCK_BODIES_PACKET: u8 = 0x05;
const BLOCK_BODIES_PACKET: u8 = 0x06;
const NEW_BLOCK_PACKET: u8 = 0x07;
const GET_NODE_DATA_PACKET: u8 = 0x0d;
const NODE_DATA_PACKET: u8 = 0x0e;
const GET_RECEIPTS_PACKET: u8 = 0x0f;
const RECEIPTS_PACKET: u8 = 0x10;
pub const ETH_PACKET_COUNT: u8 = 0x11;
const GET_SNAPSHOT_MANIFEST_PACKET: u8 = 0x11;
const SNAPSHOT_MANIFEST_PACKET: u8 = 0x12;
const GET_SNAPSHOT_DATA_PACKET: u8 = 0x13;
const SNAPSHOT_DATA_PACKET: u8 = 0x14;
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pub const SNAPSHOT_SYNC_PACKET_COUNT: u8 = 0x15;
const HEADERS_TIMEOUT_SEC: f64 = 15f64;
const BODIES_TIMEOUT_SEC: f64 = 10f64;
const RECEIPTS_TIMEOUT_SEC: f64 = 10f64;
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const FORK_HEADER_TIMEOUT_SEC: f64 = 3f64;
const SNAPSHOT_MANIFEST_TIMEOUT_SEC: f64 = 3f64;
const SNAPSHOT_DATA_TIMEOUT_SEC: f64 = 60f64;
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#[derive(Copy, Clone, Eq, PartialEq, Debug)]
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/// Sync state
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pub enum SyncState {
/// Waiting for pv64 peers to start snapshot syncing
SnapshotManifest,
/// Downloading snapshot data
SnapshotData,
/// Waiting for snapshot restoration to complete
SnapshotWaiting,
/// Downloading new blocks
Blocks,
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/// Initial chain sync complete. Waiting for new packets
Idle,
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/// Block downloading paused. Waiting for block queue to process blocks and free some space
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Waiting,
/// Downloading blocks learned from `NewHashes` packet
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NewBlocks,
}
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/// Syncing status and statistics
#[derive(Clone, Copy)]
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pub struct SyncStatus {
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/// State
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pub state: SyncState,
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/// Syncing protocol version. That's the maximum protocol version we connect to.
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pub protocol_version: u8,
/// The underlying p2p network version.
pub network_id: U256,
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/// `BlockChain` height for the moment the sync started.
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pub start_block_number: BlockNumber,
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/// Last fully downloaded and imported block number (if any).
pub last_imported_block_number: Option<BlockNumber>,
/// Highest block number in the download queue (if any).
pub highest_block_number: Option<BlockNumber>,
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/// Total number of blocks for the sync process.
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pub blocks_total: BlockNumber,
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/// Number of blocks downloaded so far.
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pub blocks_received: BlockNumber,
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/// Total number of connected peers
pub num_peers: usize,
/// Total number of active peers.
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pub num_active_peers: usize,
/// Heap memory used in bytes.
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pub mem_used: usize,
/// Snapshot chunks
pub num_snapshot_chunks: usize,
/// Snapshot chunks downloaded
pub snapshot_chunks_done: usize,
/// Last fully downloaded and imported ancient block number (if any).
pub last_imported_old_block_number: Option<BlockNumber>,
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}
impl SyncStatus {
/// Indicates if snapshot download is in progress
pub fn is_snapshot_syncing(&self) -> bool {
self.state == SyncState::SnapshotManifest
|| self.state == SyncState::SnapshotData
|| self.state == SyncState::SnapshotWaiting
}
/// Returns max no of peers to display in informants
pub fn current_max_peers(&self, min_peers: u32, max_peers: u32) -> u32 {
if self.num_peers as u32 > min_peers {
max_peers
} else {
min_peers
}
}
}
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#[derive(PartialEq, Eq, Debug, Clone)]
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/// Peer data type requested
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enum PeerAsking {
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Nothing,
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ForkHeader,
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BlockHeaders,
BlockBodies,
BlockReceipts,
SnapshotManifest,
SnapshotData,
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}
#[derive(PartialEq, Eq, Debug, Clone, Copy)]
/// Block downloader channel.
enum BlockSet {
/// New blocks better than out best blocks
NewBlocks,
/// Missing old blocks
OldBlocks,
}
#[derive(Clone, Eq, PartialEq)]
enum ForkConfirmation {
/// Fork block confirmation pending.
Unconfirmed,
/// Peers chain is too short to confirm the fork.
TooShort,
/// Fork is confurmed.
Confirmed,
}
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#[derive(Clone)]
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/// Syncing peer information
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struct PeerInfo {
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/// eth protocol version
protocol_version: u8,
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/// Peer chain genesis hash
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genesis: H256,
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/// Peer network id
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network_id: U256,
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/// Peer best block hash
latest_hash: H256,
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/// Peer total difficulty if known
difficulty: Option<U256>,
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/// Type of data currenty being requested from peer.
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asking: PeerAsking,
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/// A set of block numbers being requested
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asking_blocks: Vec<H256>,
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/// Holds requested header hash if currently requesting block header by hash
asking_hash: Option<H256>,
/// Holds requested snapshot chunk hash if any.
asking_snapshot_data: Option<H256>,
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/// Request timestamp
ask_time: f64,
/// Holds a set of transactions recently sent to this peer to avoid spamming.
last_sent_transactions: HashSet<H256>,
/// Pending request is expired and result should be ignored
expired: bool,
/// Peer fork confirmation status
confirmation: ForkConfirmation,
/// Best snapshot hash
snapshot_hash: Option<H256>,
/// Best snapshot block number
snapshot_number: Option<BlockNumber>,
/// Block set requested
block_set: Option<BlockSet>,
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}
impl PeerInfo {
fn can_sync(&self) -> bool {
self.confirmation == ForkConfirmation::Confirmed && !self.expired
}
fn is_allowed(&self) -> bool {
self.confirmation != ForkConfirmation::Unconfirmed && !self.expired
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}
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}
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/// Blockchain sync handler.
/// See module documentation for more details.
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pub struct ChainSync {
/// Sync state
state: SyncState,
/// Last block number for the start of sync
starting_block: BlockNumber,
/// Highest block number seen
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highest_block: Option<BlockNumber>,
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/// All connected peers
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peers: HashMap<PeerId, PeerInfo>,
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/// Peers active for current sync round
active_peers: HashSet<PeerId>,
/// Block download process for new blocks
new_blocks: BlockDownloader,
/// Block download process for ancient blocks
old_blocks: Option<BlockDownloader>,
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/// Last propagated block number
last_sent_block_number: BlockNumber,
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/// Network ID
network_id: U256,
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/// Optional fork block to check
fork_block: Option<(BlockNumber, H256)>,
/// Snapshot sync allowed.
snapshot_sync_enabled: bool,
/// Snapshot downloader.
snapshot: Snapshot,
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}
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type RlpResponseResult = Result<Option<(PacketId, RlpStream)>, PacketDecodeError>;
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impl ChainSync {
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/// Create a new instance of syncing strategy.
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pub fn new(config: SyncConfig, chain: &BlockChainClient) -> ChainSync {
let chain_info = chain.chain_info();
let mut sync = ChainSync {
state: SyncState::Idle,
starting_block: chain.chain_info().best_block_number,
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highest_block: None,
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peers: HashMap::new(),
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active_peers: HashSet::new(),
new_blocks: BlockDownloader::new(false, &chain_info.best_block_hash, chain_info.best_block_number),
old_blocks: None,
last_sent_block_number: 0,
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network_id: config.network_id,
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fork_block: config.fork_block,
snapshot_sync_enabled: config.warp_sync,
snapshot: Snapshot::new(),
};
sync.init_downloaders(chain);
sync
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}
/// Returns synchonization status
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pub fn status(&self) -> SyncStatus {
let last_imported_number = self.new_blocks.last_imported_block_number();
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SyncStatus {
state: self.state.clone(),
protocol_version: PROTOCOL_VERSION_63,
network_id: self.network_id,
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start_block_number: self.starting_block,
last_imported_block_number: Some(last_imported_number),
last_imported_old_block_number: self.old_blocks.as_ref().map(|d| d.last_imported_block_number()),
highest_block_number: self.highest_block.map(|n| max(n, last_imported_number)),
blocks_received: if last_imported_number > self.starting_block { last_imported_number - self.starting_block } else { 0 },
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blocks_total: match self.highest_block { Some(x) if x > self.starting_block => x - self.starting_block, _ => 0 },
num_peers: self.peers.values().filter(|p| p.is_allowed()).count(),
num_active_peers: self.peers.values().filter(|p| p.is_allowed() && p.asking != PeerAsking::Nothing).count(),
num_snapshot_chunks: self.snapshot.total_chunks(),
snapshot_chunks_done: self.snapshot.done_chunks(),
mem_used:
self.new_blocks.heap_size()
+ self.old_blocks.as_ref().map_or(0, |d| d.heap_size())
+ self.peers.heap_size_of_children(),
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}
}
/// Returns information on peers connections
pub fn peers(&self, io: &SyncIo) -> Vec<PeerInfoDigest> {
self.peers.iter()
.filter_map(|(&peer_id, ref peer_data)|
io.peer_session_info(peer_id).map(|session_info|
PeerInfoDigest {
id: session_info.id.map(|id| id.hex()),
client_version: session_info.client_version,
capabilities: session_info.peer_capabilities.into_iter().map(|c| c.to_string()).collect(),
remote_address: session_info.remote_address,
local_address: session_info.local_address,
eth_version: peer_data.protocol_version as u32,
eth_difficulty: peer_data.difficulty,
eth_head: peer_data.latest_hash,
})
)
.collect()
}
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/// Abort all sync activity
pub fn abort(&mut self, io: &mut SyncIo) {
self.reset_and_continue(io);
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self.peers.clear();
}
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#[cfg_attr(feature="dev", allow(for_kv_map))] // Because it's not possible to get `values_mut()`
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/// Reset sync. Clear all downloaded data but keep the queue
fn reset(&mut self, io: &mut SyncIo) {
self.new_blocks.reset();
self.snapshot.clear();
if self.state == SyncState::SnapshotData {
debug!(target:"sync", "Aborting snapshot restore");
io.snapshot_service().abort_restore();
}
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for (_, ref mut p) in &mut self.peers {
if p.block_set != Some(BlockSet::OldBlocks) {
p.asking_blocks.clear();
p.asking_hash = None;
// mark any pending requests as expired
if p.asking != PeerAsking::Nothing && p.is_allowed() {
p.expired = true;
}
}
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}
self.state = SyncState::Idle;
// Reactivate peers only if some progress has been made
// since the last sync round of if starting fresh.
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self.active_peers = self.peers.keys().cloned().collect();
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}
/// Restart sync
pub fn reset_and_continue(&mut self, io: &mut SyncIo) {
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trace!(target: "sync", "Restarting");
self.reset(io);
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self.continue_sync(io);
}
/// Remove peer from active peer set. Peer will be reactivated on the next sync
/// round.
fn deactivate_peer(&mut self, _io: &mut SyncIo, peer_id: PeerId) {
trace!(target: "sync", "Deactivating peer {}", peer_id);
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self.active_peers.remove(&peer_id);
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}
fn start_snapshot_sync(&mut self, io: &mut SyncIo, peer_id: PeerId) {
self.snapshot.clear();
self.request_snapshot_manifest(io, peer_id);
self.state = SyncState::SnapshotManifest;
}
/// Restart sync disregarding the block queue status. May end up re-downloading up to QUEUE_SIZE blocks
pub fn restart(&mut self, io: &mut SyncIo) {
self.init_downloaders(io.chain());
self.reset_and_continue(io);
}
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/// Restart sync after bad block has been detected. May end up re-downloading up to QUEUE_SIZE blocks
fn init_downloaders(&mut self, chain: &BlockChainClient) {
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// Do not assume that the block queue/chain still has our last_imported_block
let chain = chain.chain_info();
self.new_blocks = BlockDownloader::new(false, &chain.best_block_hash, chain.best_block_number);
if let (Some(ancient_block_hash), Some(ancient_block_number)) = (chain.ancient_block_hash, chain.ancient_block_number) {
trace!(target: "sync", "Downloading old blocks from {:?} (#{}) till {:?} (#{:?})", ancient_block_hash, ancient_block_number, chain.first_block_hash, chain.first_block_number);
let mut downloader = BlockDownloader::new(true, &ancient_block_hash, ancient_block_number);
if let Some(hash) = chain.first_block_hash {
trace!(target: "sync", "Downloader target set to {:?}", hash);
downloader.set_target(&hash);
}
self.old_blocks = Some(downloader);
} else {
self.old_blocks = None;
}
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}
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/// Called by peer to report status
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fn on_peer_status(&mut self, io: &mut SyncIo, peer_id: PeerId, r: &UntrustedRlp) -> Result<(), PacketDecodeError> {
let protocol_version: u8 = try!(r.val_at(0));
let warp_protocol = io.protocol_version(&WARP_SYNC_PROTOCOL_ID, peer_id) != 0;
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let peer = PeerInfo {
protocol_version: protocol_version,
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network_id: try!(r.val_at(1)),
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difficulty: Some(try!(r.val_at(2))),
latest_hash: try!(r.val_at(3)),
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genesis: try!(r.val_at(4)),
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asking: PeerAsking::Nothing,
asking_blocks: Vec::new(),
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asking_hash: None,
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ask_time: 0f64,
last_sent_transactions: HashSet::new(),
expired: false,
confirmation: if self.fork_block.is_none() { ForkConfirmation::Confirmed } else { ForkConfirmation::Unconfirmed },
asking_snapshot_data: None,
snapshot_hash: if warp_protocol { Some(try!(r.val_at(5))) } else { None },
snapshot_number: if warp_protocol { Some(try!(r.val_at(6))) } else { None },
block_set: None,
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};
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trace!(target: "sync", "New peer {} (protocol: {}, network: {:?}, difficulty: {:?}, latest:{}, genesis:{})", peer_id, peer.protocol_version, peer.network_id, peer.difficulty, peer.latest_hash, peer.genesis);
if io.is_expired() {
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trace!(target: "sync", "Status packet from expired session {}:{}", peer_id, io.peer_info(peer_id));
return Ok(());
}
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if self.peers.contains_key(&peer_id) {
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debug!(target: "sync", "Unexpected status packet from {}:{}", peer_id, io.peer_info(peer_id));
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return Ok(());
}
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let chain_info = io.chain().chain_info();
if peer.genesis != chain_info.genesis_hash {
io.disable_peer(peer_id);
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trace!(target: "sync", "Peer {} genesis hash mismatch (ours: {}, theirs: {})", peer_id, chain_info.genesis_hash, peer.genesis);
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return Ok(());
}
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if peer.network_id != self.network_id {
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io.disable_peer(peer_id);
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trace!(target: "sync", "Peer {} network id mismatch (ours: {}, theirs: {})", peer_id, self.network_id, peer.network_id);
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return Ok(());
}
if (warp_protocol && peer.protocol_version != PROTOCOL_VERSION_1) || (!warp_protocol && peer.protocol_version != PROTOCOL_VERSION_63) {
io.disable_peer(peer_id);
trace!(target: "sync", "Peer {} unsupported eth protocol ({})", peer_id, peer.protocol_version);
return Ok(());
}
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self.peers.insert(peer_id.clone(), peer);
self.active_peers.insert(peer_id.clone());
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debug!(target: "sync", "Connected {}:{}", peer_id, io.peer_info(peer_id));
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if let Some((fork_block, _)) = self.fork_block {
self.request_fork_header_by_number(io, peer_id, fork_block);
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} else {
self.sync_peer(io, peer_id, false);
}
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Ok(())
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}
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#[cfg_attr(feature="dev", allow(cyclomatic_complexity))]
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/// Called by peer once it has new block headers during sync
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fn on_peer_block_headers(&mut self, io: &mut SyncIo, peer_id: PeerId, r: &UntrustedRlp) -> Result<(), PacketDecodeError> {
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let confirmed = match self.peers.get_mut(&peer_id) {
Some(ref mut peer) if peer.asking == PeerAsking::ForkHeader => {
peer.asking = PeerAsking::Nothing;
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let item_count = r.item_count();
let (fork_number, fork_hash) = self.fork_block.expect("ForkHeader request is sent only fork block is Some; qed").clone();
if item_count == 0 || item_count != 1 {
trace!(target: "sync", "{}: Chain is too short to confirm the block", peer_id);
peer.confirmation = ForkConfirmation::TooShort;
} else {
let header = try!(r.at(0)).as_raw();
if header.sha3() == fork_hash {
trace!(target: "sync", "{}: Confirmed peer", peer_id);
peer.confirmation = ForkConfirmation::Confirmed;
if !io.chain_overlay().read().contains_key(&fork_number) {
io.chain_overlay().write().insert(fork_number, header.to_vec());
}
} else {
trace!(target: "sync", "{}: Fork mismatch", peer_id);
io.disconnect_peer(peer_id);
return Ok(());
}
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}
true
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},
_ => false,
};
if confirmed {
self.sync_peer(io, peer_id, false);
return Ok(());
}
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self.clear_peer_download(peer_id);
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let expected_hash = self.peers.get(&peer_id).and_then(|p| p.asking_hash);
let block_set = self.peers.get(&peer_id).and_then(|p| p.block_set).unwrap_or(BlockSet::NewBlocks);
if !self.reset_peer_asking(peer_id, PeerAsking::BlockHeaders) || expected_hash.is_none() {
trace!(target: "sync", "{}: Ignored unexpected headers, expected_hash = {:?}", peer_id, expected_hash);
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self.continue_sync(io);
return Ok(());
}
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let item_count = r.item_count();
trace!(target: "sync", "{} -> BlockHeaders ({} entries), state = {:?}, set = {:?}", peer_id, item_count, self.state, block_set);
if self.state == SyncState::Idle && self.old_blocks.is_none() {
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trace!(target: "sync", "Ignored unexpected block headers");
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self.continue_sync(io);
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return Ok(());
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}
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if self.state == SyncState::Waiting {
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trace!(target: "sync", "Ignored block headers while waiting");
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self.continue_sync(io);
return Ok(());
}
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let result = {
let mut downloader = match block_set {
BlockSet::NewBlocks => &mut self.new_blocks,
BlockSet::OldBlocks => {
match self.old_blocks {
None => {
trace!(target: "sync", "Ignored block headers while block download is inactive");
self.continue_sync(io);
return Ok(());
},
Some(ref mut blocks) => blocks,
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}
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}
};
downloader.import_headers(io, r, expected_hash)
};
match result {
Err(DownloaderImportError::Useless) => {
self.deactivate_peer(io, peer_id);
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},
Err(DownloaderImportError::Invalid) => {
io.disable_peer(peer_id);
self.deactivate_peer(io, peer_id);
self.continue_sync(io);
return Ok(());
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},
Ok(()) => (),
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}
self.collect_blocks(io, block_set);
// give a task to the same peer first if received valuable headers.
self.sync_peer(io, peer_id, false);
// give tasks to other peers
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self.continue_sync(io);
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Ok(())
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}
/// Called by peer once it has new block bodies
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fn on_peer_block_bodies(&mut self, io: &mut SyncIo, peer_id: PeerId, r: &UntrustedRlp) -> Result<(), PacketDecodeError> {
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self.clear_peer_download(peer_id);
let block_set = self.peers.get(&peer_id).and_then(|p| p.block_set).unwrap_or(BlockSet::NewBlocks);
if !self.reset_peer_asking(peer_id, PeerAsking::BlockBodies) {
trace!(target: "sync", "{}: Ignored unexpected bodies", peer_id);
self.continue_sync(io);
return Ok(());
}
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let item_count = r.item_count();
trace!(target: "sync", "{} -> BlockBodies ({} entries), set = {:?}", peer_id, item_count, block_set);
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if item_count == 0 {
self.deactivate_peer(io, peer_id);
}
else if self.state == SyncState::Waiting {
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trace!(target: "sync", "Ignored block bodies while waiting");
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}
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else
{
let result = {
let mut downloader = match block_set {
BlockSet::NewBlocks => &mut self.new_blocks,
BlockSet::OldBlocks => match self.old_blocks {
None => {
trace!(target: "sync", "Ignored block headers while block download is inactive");
self.continue_sync(io);
return Ok(());
},
Some(ref mut blocks) => blocks,
}
};
downloader.import_bodies(io, r)
};
match result {
Err(DownloaderImportError::Invalid) => {
io.disable_peer(peer_id);
self.deactivate_peer(io, peer_id);
self.continue_sync(io);
return Ok(());
},
Err(DownloaderImportError::Useless) => {
self.deactivate_peer(io, peer_id);
},
Ok(()) => (),
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}
self.collect_blocks(io, block_set);
self.sync_peer(io, peer_id, false);
}
self.continue_sync(io);
Ok(())
}
/// Called by peer once it has new block receipts
fn on_peer_block_receipts(&mut self, io: &mut SyncIo, peer_id: PeerId, r: &UntrustedRlp) -> Result<(), PacketDecodeError> {
self.clear_peer_download(peer_id);
let block_set = self.peers.get(&peer_id).and_then(|p| p.block_set).unwrap_or(BlockSet::NewBlocks);
if !self.reset_peer_asking(peer_id, PeerAsking::BlockReceipts) {
trace!(target: "sync", "{}: Ignored unexpected receipts", peer_id);
self.continue_sync(io);
return Ok(());
}
let item_count = r.item_count();
trace!(target: "sync", "{} -> BlockReceipts ({} entries)", peer_id, item_count);
if item_count == 0 {
self.deactivate_peer(io, peer_id);
}
else if self.state == SyncState::Waiting {
trace!(target: "sync", "Ignored block receipts while waiting");
}
else
{
let result = {
let mut downloader = match block_set {
BlockSet::NewBlocks => &mut self.new_blocks,
BlockSet::OldBlocks => match self.old_blocks {
None => {
trace!(target: "sync", "Ignored block headers while block download is inactive");
self.continue_sync(io);
return Ok(());
},
Some(ref mut blocks) => blocks,
}
};
downloader.import_receipts(io, r)
};
match result {
Err(DownloaderImportError::Invalid) => {
io.disable_peer(peer_id);
self.deactivate_peer(io, peer_id);
self.continue_sync(io);
return Ok(());
},
Err(DownloaderImportError::Useless) => {
self.deactivate_peer(io, peer_id);
},
Ok(()) => (),
}
self.collect_blocks(io, block_set);
self.sync_peer(io, peer_id, false);
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}
self.continue_sync(io);
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Ok(())
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}
/// Called by peer once it has new block bodies
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#[cfg_attr(feature="dev", allow(cyclomatic_complexity))]
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fn on_peer_new_block(&mut self, io: &mut SyncIo, peer_id: PeerId, r: &UntrustedRlp) -> Result<(), PacketDecodeError> {
if !self.peers.get(&peer_id).map_or(false, |p| p.can_sync()) {
trace!(target: "sync", "Ignoring new block from unconfirmed peer {}", peer_id);
return Ok(());
}
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let block_rlp = try!(r.at(0));
let header_rlp = try!(block_rlp.at(0));
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let h = header_rlp.as_raw().sha3();
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trace!(target: "sync", "{} -> NewBlock ({})", peer_id, h);
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let header: BlockHeader = try!(header_rlp.as_val());
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if header.number() > self.highest_block.unwrap_or(0) {
self.highest_block = Some(header.number());
}
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let mut unknown = false;
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{
if let Some(ref mut peer) = self.peers.get_mut(&peer_id) {
peer.latest_hash = header.hash();
}
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}
let last_imported_number = self.new_blocks.last_imported_block_number();
if last_imported_number > header.number() && last_imported_number - header.number() > MAX_NEW_BLOCK_AGE {
trace!(target: "sync", "Ignored ancient new block {:?}", h);
io.disable_peer(peer_id);
return Ok(());
}
match io.chain().import_block(block_rlp.as_raw().to_vec()) {
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Err(BlockImportError::Import(ImportError::AlreadyInChain)) => {
trace!(target: "sync", "New block already in chain {:?}", h);
},
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Err(BlockImportError::Import(ImportError::AlreadyQueued)) => {
trace!(target: "sync", "New block already queued {:?}", h);
},
Ok(_) => {
self.new_blocks.mark_as_known(&header.hash(), header.number());
trace!(target: "sync", "New block queued {:?} ({})", h, header.number());
},
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Err(BlockImportError::Block(BlockError::UnknownParent(p))) => {
unknown = true;
trace!(target: "sync", "New block with unknown parent ({:?}) {:?}", p, h);
},
Err(e) => {
debug!(target: "sync", "Bad new block {:?} : {:?}", h, e);
io.disable_peer(peer_id);
}
};
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if unknown {
if self.state != SyncState::Idle {
trace!(target: "sync", "NewBlock ignored while seeking");
} else {
trace!(target: "sync", "New unknown block {:?}", h);
//TODO: handle too many unknown blocks
let difficulty: U256 = try!(r.val_at(1));
if let Some(ref mut peer) = self.peers.get_mut(&peer_id) {
if peer.difficulty.map_or(true, |pd| difficulty > pd) {
peer.difficulty = Some(difficulty);
trace!(target: "sync", "Received block {:?} with no known parent. Peer needs syncing...", h);
}
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}
self.sync_peer(io, peer_id, true);
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}
}
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Ok(())
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}
/// Handles `NewHashes` packet. Initiates headers download for any unknown hashes.
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fn on_peer_new_hashes(&mut self, io: &mut SyncIo, peer_id: PeerId, r: &UntrustedRlp) -> Result<(), PacketDecodeError> {
if !self.peers.get(&peer_id).map_or(false, |p| p.can_sync()) {
trace!(target: "sync", "Ignoring new hashes from unconfirmed peer {}", peer_id);
return Ok(());
}
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if self.state != SyncState::Idle {
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trace!(target: "sync", "Ignoring new hashes since we're already downloading.");
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let max = r.iter().take(MAX_NEW_HASHES).map(|item| item.val_at::<BlockNumber>(1).unwrap_or(0)).fold(0u64, max);
if max > self.highest_block.unwrap_or(0) {
self.highest_block = Some(max);
}
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return Ok(());
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}
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trace!(target: "sync", "{} -> NewHashes ({} entries)", peer_id, r.item_count());
let hashes = r.iter().take(MAX_NEW_HASHES).map(|item| (item.val_at::<H256>(0), item.val_at::<BlockNumber>(1)));
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let mut max_height: BlockNumber = 0;
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let mut new_hashes = Vec::new();
let last_imported_number = self.new_blocks.last_imported_block_number();
for (rh, rn) in hashes {
let hash = try!(rh);
let number = try!(rn);
if number > self.highest_block.unwrap_or(0) {
self.highest_block = Some(number);
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}
if self.new_blocks.is_downloading(&hash) {
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continue;
}
if last_imported_number > number && last_imported_number - number > MAX_NEW_BLOCK_AGE {
trace!(target: "sync", "Ignored ancient new block hash {:?}", hash);
io.disable_peer(peer_id);
continue;
}
match io.chain().block_status(BlockID::Hash(hash.clone())) {
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BlockStatus::InChain => {
trace!(target: "sync", "New block hash already in chain {:?}", hash);
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},
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BlockStatus::Queued => {
trace!(target: "sync", "New hash block already queued {:?}", hash);
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},
BlockStatus::Unknown => {
new_hashes.push(hash.clone());
if number > max_height {
trace!(target: "sync", "New unknown block hash {:?}", hash);
if let Some(ref mut peer) = self.peers.get_mut(&peer_id) {
peer.latest_hash = hash.clone();
}
max_height = number;
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}
},
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BlockStatus::Bad => {
debug!(target: "sync", "Bad new block hash {:?}", hash);
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io.disable_peer(peer_id);
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return Ok(());
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}
}
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};
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if max_height != 0 {
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trace!(target: "sync", "Downloading blocks for new hashes");
self.new_blocks.reset_to(new_hashes);
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self.state = SyncState::NewBlocks;
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self.sync_peer(io, peer_id, true);
}
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Ok(())
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}
/// Called when snapshot manifest is downloaded from a peer.
fn on_snapshot_manifest(&mut self, io: &mut SyncIo, peer_id: PeerId, r: &UntrustedRlp) -> Result<(), PacketDecodeError> {
if !self.peers.get(&peer_id).map_or(false, |p| p.can_sync()) {
trace!(target: "sync", "Ignoring snapshot manifest from unconfirmed peer {}", peer_id);
return Ok(());
}
self.clear_peer_download(peer_id);
if !self.reset_peer_asking(peer_id, PeerAsking::SnapshotManifest) || self.state != SyncState::SnapshotManifest {
trace!(target: "sync", "{}: Ignored unexpected manifest", peer_id);
self.continue_sync(io);
return Ok(());
}
let manifest_rlp = try!(r.at(0));
let manifest = match ManifestData::from_rlp(manifest_rlp.as_raw()) {
Err(e) => {
trace!(target: "sync", "{}: Ignored bad manifest: {:?}", peer_id, e);
io.disconnect_peer(peer_id);
self.continue_sync(io);
return Ok(());
}
Ok(manifest) => manifest,
};
self.snapshot.reset_to(&manifest, &manifest_rlp.as_raw().sha3());
io.snapshot_service().begin_restore(manifest);
self.state = SyncState::SnapshotData;
// give a task to the same peer first.
self.sync_peer(io, peer_id, false);
// give tasks to other peers
self.continue_sync(io);
Ok(())
}
/// Called when snapshot data is downloaded from a peer.
fn on_snapshot_data(&mut self, io: &mut SyncIo, peer_id: PeerId, r: &UntrustedRlp) -> Result<(), PacketDecodeError> {
if !self.peers.get(&peer_id).map_or(false, |p| p.can_sync()) {
trace!(target: "sync", "Ignoring snapshot data from unconfirmed peer {}", peer_id);
return Ok(());
}
self.clear_peer_download(peer_id);
if !self.reset_peer_asking(peer_id, PeerAsking::SnapshotData) || self.state != SyncState::SnapshotData {
trace!(target: "sync", "{}: Ignored unexpected snapshot data", peer_id);
self.continue_sync(io);
return Ok(());
}
// check service status
match io.snapshot_service().status() {
RestorationStatus::Inactive | RestorationStatus::Failed => {
trace!(target: "sync", "{}: Snapshot restoration aborted", peer_id);
self.state = SyncState::Idle;
self.snapshot.clear();
self.continue_sync(io);
return Ok(());
},
RestorationStatus::Ongoing { .. } => {
trace!(target: "sync", "{}: Snapshot restoration is ongoing", peer_id);
},
}
let snapshot_data: Bytes = try!(r.val_at(0));
match self.snapshot.validate_chunk(&snapshot_data) {
Ok(ChunkType::Block(hash)) => {
trace!(target: "sync", "{}: Processing block chunk", peer_id);
io.snapshot_service().restore_block_chunk(hash, snapshot_data);
}
Ok(ChunkType::State(hash)) => {
trace!(target: "sync", "{}: Processing state chunk", peer_id);
io.snapshot_service().restore_state_chunk(hash, snapshot_data);
}
Err(()) => {
trace!(target: "sync", "{}: Got bad snapshot chunk", peer_id);
io.disconnect_peer(peer_id);
self.continue_sync(io);
return Ok(());
}
}
if self.snapshot.is_complete() {
// wait for snapshot restoration process to complete
self.state = SyncState::SnapshotWaiting;
}
// give a task to the same peer first.
self.sync_peer(io, peer_id, false);
// give tasks to other peers
self.continue_sync(io);
Ok(())
}
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/// Called by peer when it is disconnecting
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pub fn on_peer_aborting(&mut self, io: &mut SyncIo, peer: PeerId) {
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trace!(target: "sync", "== Disconnecting {}: {}", peer, io.peer_info(peer));
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if self.peers.contains_key(&peer) {
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debug!(target: "sync", "Disconnected {}", peer);
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self.clear_peer_download(peer);
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self.peers.remove(&peer);
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self.active_peers.remove(&peer);
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self.continue_sync(io);
}
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}
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/// Called when a new peer is connected
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pub fn on_peer_connected(&mut self, io: &mut SyncIo, peer: PeerId) {
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trace!(target: "sync", "== Connected {}: {}", peer, io.peer_info(peer));
if let Err(e) = self.send_status(io, peer) {
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debug!(target:"sync", "Error sending status request: {:?}", e);
io.disable_peer(peer);
}
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}
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/// Resume downloading
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fn continue_sync(&mut self, io: &mut SyncIo) {
if self.state != SyncState::Waiting && self.state != SyncState::SnapshotWaiting
&& !self.peers.values().any(|p| p.asking != PeerAsking::Nothing && p.block_set != Some(BlockSet::OldBlocks) && p.can_sync()) {
self.complete_sync(io);
}
let mut peers: Vec<(PeerId, U256, u8)> = self.peers.iter().filter_map(|(k, p)|
if p.can_sync() { Some((*k, p.difficulty.unwrap_or_else(U256::zero), p.protocol_version)) } else { None }).collect();
thread_rng().shuffle(&mut peers); //TODO: sort by rating
// prefer peers with higher protocol version
peers.sort_by(|&(_, _, ref v1), &(_, _, ref v2)| v1.cmp(v2));
trace!(target: "sync", "Syncing with {}/{} peers", self.active_peers.len(), peers.len());
for (p, _, _) in peers {
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if self.active_peers.contains(&p) {
self.sync_peer(io, p, false);
}
}
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}
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/// Called after all blocks have been downloaded
fn complete_sync(&mut self, io: &mut SyncIo) {
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trace!(target: "sync", "Sync complete");
self.reset(io);
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self.state = SyncState::Idle;
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}
/// Enter waiting state
fn pause_sync(&mut self) {
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trace!(target: "sync", "Block queue full, pausing sync");
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self.state = SyncState::Waiting;
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}
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/// Find something to do for a peer. Called for a new peer or when a peer is done with its task.
fn sync_peer(&mut self, io: &mut SyncIo, peer_id: PeerId, force: bool) {
if !self.active_peers.contains(&peer_id) {
trace!(target: "sync", "Skipping deactivated peer");
return;
}
let (peer_latest, peer_difficulty, peer_snapshot_number, peer_snapshot_hash) = {
if let Some(ref peer) = self.peers.get_mut(&peer_id) {
if peer.asking != PeerAsking::Nothing || !peer.can_sync() {
return;
}
if self.state == SyncState::Waiting {
trace!(target: "sync", "Waiting for the block queue");
return;
}
if self.state == SyncState::SnapshotWaiting {
trace!(target: "sync", "Waiting for the snapshot restoration");
return;
}
(peer.latest_hash.clone(), peer.difficulty.clone(), peer.snapshot_number.as_ref().cloned().unwrap_or(0), peer.snapshot_hash.as_ref().cloned())
} else {
return;
}
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};
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let chain_info = io.chain().chain_info();
let syncing_difficulty = chain_info.pending_total_difficulty;
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let higher_difficulty = peer_difficulty.map_or(true, |pd| pd > syncing_difficulty);
if force || self.state == SyncState::NewBlocks || higher_difficulty || self.old_blocks.is_some() {
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match self.state {
SyncState::Idle if self.snapshot_sync_enabled
&& chain_info.best_block_number < peer_snapshot_number
&& (peer_snapshot_number - chain_info.best_block_number) > SNAPSHOT_RESTORE_THRESHOLD => {
trace!(target: "sync", "Starting snapshot sync: {} vs {}", peer_snapshot_number, chain_info.best_block_number);
self.start_snapshot_sync(io, peer_id);
},
SyncState::Idle | SyncState::Blocks | SyncState::NewBlocks => {
if io.chain().queue_info().is_full() {
self.pause_sync();
return;
}
let have_latest = io.chain().block_status(BlockID::Hash(peer_latest)) != BlockStatus::Unknown;
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if !have_latest && (higher_difficulty || force || self.state == SyncState::NewBlocks) {
// check if got new blocks to download
if let Some(request) = self.new_blocks.request_blocks(io) {
self.request_blocks(io, peer_id, request, BlockSet::NewBlocks);
if self.state == SyncState::Idle {
self.state = SyncState::Blocks;
}
return;
}
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}
if let Some(request) = self.old_blocks.as_mut().and_then(|d| d.request_blocks(io)) {
self.request_blocks(io, peer_id, request, BlockSet::OldBlocks);
return;
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}
},
SyncState::SnapshotData => {
if peer_snapshot_hash.is_some() && peer_snapshot_hash == self.snapshot.snapshot_hash() {
self.request_snapshot_data(io, peer_id);
}
},
SyncState::SnapshotManifest | //already downloading from other peer
SyncState::Waiting | SyncState::SnapshotWaiting => ()
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}
}
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}
/// Perofrm block download request`
fn request_blocks(&mut self, io: &mut SyncIo, peer_id: PeerId, request: BlockRequest, block_set: BlockSet) {
match request {
BlockRequest::Headers { start, count, skip } => {
self.request_headers_by_hash(io, peer_id, &start, count, skip, false, block_set);
},
BlockRequest::Bodies { hashes } => {
self.request_bodies(io, peer_id, hashes, block_set);
},
BlockRequest::Receipts { hashes } => {
self.request_receipts(io, peer_id, hashes, block_set);
},
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}
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}
/// Find some headers or blocks to download for a peer.
fn request_snapshot_data(&mut self, io: &mut SyncIo, peer_id: PeerId) {
self.clear_peer_download(peer_id);
// find chunk data to download
if let Some(hash) = self.snapshot.needed_chunk() {
if let Some(ref mut peer) = self.peers.get_mut(&peer_id) {
peer.asking_snapshot_data = Some(hash.clone());
}
self.request_snapshot_chunk(io, peer_id, &hash);
}
}
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/// Clear all blocks/headers marked as being downloaded by a peer.
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fn clear_peer_download(&mut self, peer_id: PeerId) {
if let Some(ref mut peer) = self.peers.get_mut(&peer_id) {
match peer.asking {
PeerAsking::BlockHeaders => {
if let Some(ref hash) = peer.asking_hash {
self.new_blocks.clear_header_download(hash);
if let Some(ref mut old) = self.old_blocks {
old.clear_header_download(hash);
}
}
},
PeerAsking::BlockBodies => {
self.new_blocks.clear_body_download(&peer.asking_blocks);
if let Some(ref mut old) = self.old_blocks {
old.clear_body_download(&peer.asking_blocks);
}
},
PeerAsking::BlockReceipts => {
self.new_blocks.clear_receipt_download(&peer.asking_blocks);
if let Some(ref mut old) = self.old_blocks {
old.clear_receipt_download(&peer.asking_blocks);
}
},
PeerAsking::SnapshotData => {
if let Some(hash) = peer.asking_snapshot_data {
self.snapshot.clear_chunk_download(&hash);
}
},
_ => (),
}
}
}
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/// Checks if there are blocks fully downloaded that can be imported into the blockchain and does the import.
fn collect_blocks(&mut self, io: &mut SyncIo, block_set: BlockSet) {
match block_set {
BlockSet::NewBlocks => {
if self.new_blocks.collect_blocks(io, self.state == SyncState::NewBlocks) == Err(DownloaderImportError::Invalid) {
self.restart(io);
}
},
BlockSet::OldBlocks => {
if self.old_blocks.as_mut().map_or(false, |downloader| { downloader.collect_blocks(io, false) == Err(DownloaderImportError::Invalid) }) {
self.restart(io);
} else if self.old_blocks.as_ref().map_or(false, |downloader| { downloader.is_complete() }) {
trace!(target: "sync", "Background block download is complete");
self.old_blocks = None;
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}
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}
}
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}
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/// Request headers from a peer by block hash
#[cfg_attr(feature="dev", allow(too_many_arguments))]
fn request_headers_by_hash(&mut self, sync: &mut SyncIo, peer_id: PeerId, h: &H256, count: u64, skip: u64, reverse: bool, set: BlockSet) {
trace!(target: "sync", "{} <- GetBlockHeaders: {} entries starting from {}, set = {:?}", peer_id, count, h, set);
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let mut rlp = RlpStream::new_list(4);
rlp.append(h);
rlp.append(&count);
rlp.append(&skip);
rlp.append(&if reverse {1u32} else {0u32});
self.send_request(sync, peer_id, PeerAsking::BlockHeaders, GET_BLOCK_HEADERS_PACKET, rlp.out());
let peer = self.peers.get_mut(&peer_id).expect("peer_id may originate either from on_packet, where it is already validated or from enumerating self.peers. qed");
peer.asking_hash = Some(h.clone());
peer.block_set = Some(set);
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}
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/// Request headers from a peer by block number
#[cfg_attr(feature="dev", allow(too_many_arguments))]
fn request_fork_header_by_number(&mut self, sync: &mut SyncIo, peer_id: PeerId, n: BlockNumber) {
trace!(target: "sync", "{} <- GetForkHeader: at {}", peer_id, n);
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let mut rlp = RlpStream::new_list(4);
rlp.append(&n);
rlp.append(&1u32);
rlp.append(&0u32);
rlp.append(&0u32);
self.send_request(sync, peer_id, PeerAsking::ForkHeader, GET_BLOCK_HEADERS_PACKET, rlp.out());
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}
/// Request snapshot manifest from a peer.
fn request_snapshot_manifest(&mut self, sync: &mut SyncIo, peer_id: PeerId) {
trace!(target: "sync", "{} <- GetSnapshotManifest", peer_id);
let rlp = RlpStream::new_list(0);
self.send_request(sync, peer_id, PeerAsking::SnapshotManifest, GET_SNAPSHOT_MANIFEST_PACKET, rlp.out());
}
/// Request snapshot chunk from a peer.
fn request_snapshot_chunk(&mut self, sync: &mut SyncIo, peer_id: PeerId, chunk: &H256) {
trace!(target: "sync", "{} <- GetSnapshotData {:?}", peer_id, chunk);
let mut rlp = RlpStream::new_list(1);
rlp.append(chunk);
self.send_request(sync, peer_id, PeerAsking::SnapshotData, GET_SNAPSHOT_DATA_PACKET, rlp.out());
}
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/// Request block bodies from a peer
fn request_bodies(&mut self, sync: &mut SyncIo, peer_id: PeerId, hashes: Vec<H256>, set: BlockSet) {
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let mut rlp = RlpStream::new_list(hashes.len());
trace!(target: "sync", "{} <- GetBlockBodies: {} entries starting from {:?}, set = {:?}", peer_id, hashes.len(), hashes.first(), set);
for h in &hashes {
rlp.append(&h.clone());
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}
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self.send_request(sync, peer_id, PeerAsking::BlockBodies, GET_BLOCK_BODIES_PACKET, rlp.out());
let peer = self.peers.get_mut(&peer_id).expect("peer_id may originate either from on_packet, where it is already validated or from enumerating self.peers. qed");
peer.asking_blocks = hashes;
peer.block_set = Some(set);
}
/// Request block receipts from a peer
fn request_receipts(&mut self, sync: &mut SyncIo, peer_id: PeerId, hashes: Vec<H256>, set: BlockSet) {
let mut rlp = RlpStream::new_list(hashes.len());
trace!(target: "sync", "{} <- GetBlockReceipts: {} entries starting from {:?}, set = {:?}", peer_id, hashes.len(), hashes.first(), set);
for h in &hashes {
rlp.append(&h.clone());
}
self.send_request(sync, peer_id, PeerAsking::BlockReceipts, GET_RECEIPTS_PACKET, rlp.out());
let peer = self.peers.get_mut(&peer_id).expect("peer_id may originate either from on_packet, where it is already validated or from enumerating self.peers. qed");
peer.asking_blocks = hashes;
peer.block_set = Some(set);
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}
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/// Reset peer status after request is complete.
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fn reset_peer_asking(&mut self, peer_id: PeerId, asking: PeerAsking) -> bool {
if let Some(ref mut peer) = self.peers.get_mut(&peer_id) {
peer.expired = false;
peer.block_set = None;
if peer.asking != asking {
trace!(target:"sync", "Asking {:?} while expected {:?}", peer.asking, asking);
peer.asking = PeerAsking::Nothing;
return false;
} else {
peer.asking = PeerAsking::Nothing;
return true;
}
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}
return false;
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}
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/// Generic request sender
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fn send_request(&mut self, sync: &mut SyncIo, peer_id: PeerId, asking: PeerAsking, packet_id: PacketId, packet: Bytes) {
if let Some(ref mut peer) = self.peers.get_mut(&peer_id) {
if peer.asking != PeerAsking::Nothing {
warn!(target:"sync", "Asking {:?} while requesting {:?}", peer.asking, asking);
}
peer.asking = asking;
peer.ask_time = time::precise_time_s();
let result = if packet_id >= ETH_PACKET_COUNT {
sync.send_protocol(WARP_SYNC_PROTOCOL_ID, peer_id, packet_id, packet)
} else {
sync.send(peer_id, packet_id, packet)
};
if let Err(e) = result {
debug!(target:"sync", "Error sending request: {:?}", e);
sync.disable_peer(peer_id);
}
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}
}
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/// Generic packet sender
fn send_packet(&mut self, sync: &mut SyncIo, peer_id: PeerId, packet_id: PacketId, packet: Bytes) {
if let Err(e) = sync.send(peer_id, packet_id, packet) {
debug!(target:"sync", "Error sending packet: {:?}", e);
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sync.disable_peer(peer_id);
}
}
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/// Called when peer sends us new transactions
fn on_peer_transactions(&mut self, io: &mut SyncIo, peer_id: PeerId, r: &UntrustedRlp) -> Result<(), PacketDecodeError> {
// Accept transactions only when fully synced
if !io.is_chain_queue_empty() || self.state != SyncState::Idle || self.state != SyncState::NewBlocks {
trace!(target: "sync", "{} Ignoring transactions while syncing", peer_id);
return Ok(());
}
if !self.peers.get(&peer_id).map_or(false, |p| p.can_sync()) {
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trace!(target: "sync", "{} Ignoring transactions from unconfirmed/unknown peer", peer_id);
}
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let mut item_count = r.item_count();
trace!(target: "sync", "{} -> Transactions ({} entries)", peer_id, item_count);
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item_count = min(item_count, MAX_TX_TO_IMPORT);
let mut transactions = Vec::with_capacity(item_count);
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for i in 0 .. item_count {
let rlp = try!(r.at(i));
if rlp.as_raw().len() > MAX_TRANSACTION_SIZE {
debug!("Skipped oversized transaction of {} bytes", rlp.as_raw().len());
continue;
}
let tx = rlp.as_raw().to_vec();
transactions.push(tx);
}
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io.chain().queue_transactions(transactions);
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Ok(())
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}
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/// Send Status message
fn send_status(&mut self, io: &mut SyncIo, peer: PeerId) -> Result<(), NetworkError> {
let warp_protocol = io.protocol_version(&WARP_SYNC_PROTOCOL_ID, peer) != 0;
let protocol = if warp_protocol { PROTOCOL_VERSION_1 } else { PROTOCOL_VERSION_63 };
trace!(target: "sync", "Sending status to {}, protocol version {}", peer, protocol);
let mut packet = RlpStream::new_list(if warp_protocol { 7 } else { 5 });
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let chain = io.chain().chain_info();
packet.append(&(protocol as u32));
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packet.append(&self.network_id);
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packet.append(&chain.total_difficulty);
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packet.append(&chain.best_block_hash);
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packet.append(&chain.genesis_hash);
if warp_protocol {
let manifest = io.snapshot_service().manifest();
let block_number = manifest.as_ref().map_or(0, |m| m.block_number);
let manifest_hash = manifest.map_or(H256::new(), |m| m.into_rlp().sha3());
packet.append(&manifest_hash);
packet.append(&block_number);
}
io.respond(STATUS_PACKET, packet.out())
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}
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/// Respond to GetBlockHeaders request
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fn return_block_headers(io: &SyncIo, r: &UntrustedRlp, peer_id: PeerId) -> RlpResponseResult {
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// Packet layout:
// [ block: { P , B_32 }, maxHeaders: P, skip: P, reverse: P in { 0 , 1 } ]
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let max_headers: usize = try!(r.val_at(1));
let skip: usize = try!(r.val_at(2));
let reverse: bool = try!(r.val_at(3));
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let last = io.chain().chain_info().best_block_number;
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let number = if try!(r.at(0)).size() == 32 {
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// id is a hash
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let hash: H256 = try!(r.val_at(0));
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trace!(target: "sync", "{} -> GetBlockHeaders (hash: {}, max: {}, skip: {}, reverse:{})", peer_id, hash, max_headers, skip, reverse);
match io.chain().block_header(BlockID::Hash(hash)) {
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Some(hdr) => {
let number = From::from(HeaderView::new(&hdr).number());
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debug_assert_eq!(HeaderView::new(&hdr).sha3(), hash);
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if max_headers == 1 || io.chain().block_hash(BlockID::Number(number)) != Some(hash) {
// Non canonical header or single header requested
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// TODO: handle single-step reverse hashchains of non-canon hashes
trace!(target:"sync", "Returning single header: {:?}", hash);
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let mut rlp = RlpStream::new_list(1);
rlp.append_raw(&hdr, 1);
return Ok(Some((BLOCK_HEADERS_PACKET, rlp)));
}
number
}
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None => return Ok(Some((BLOCK_HEADERS_PACKET, RlpStream::new_list(0)))) //no such header, return nothing
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}
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} else {
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trace!(target: "sync", "{} -> GetBlockHeaders (number: {}, max: {}, skip: {}, reverse:{})", peer_id, try!(r.val_at::<BlockNumber>(0)), max_headers, skip, reverse);
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try!(r.val_at(0))
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};
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let mut number = if reverse {
min(last, number)
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} else {
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max(0, number)
};
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let max_count = min(MAX_HEADERS_TO_SEND, max_headers);
let mut count = 0;
let mut data = Bytes::new();
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let inc = (skip + 1) as BlockNumber;
let overlay = io.chain_overlay().read();
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while number <= last && count < max_count {
if let Some(hdr) = overlay.get(&number) {
trace!(target: "sync", "{}: Returning cached fork header", peer_id);
data.extend(hdr);
count += 1;
} else if let Some(mut hdr) = io.chain().block_header(BlockID::Number(number)) {
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data.append(&mut hdr);
count += 1;
} else {
// No required block.
break;
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}
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if reverse {
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if number <= inc || number == 0 {
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break;
}
number -= inc;
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}
else {
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number += inc;
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}
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}
let mut rlp = RlpStream::new_list(count as usize);
rlp.append_raw(&data, count as usize);
trace!(target: "sync", "{} -> GetBlockHeaders: returned {} entries", peer_id, count);
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Ok(Some((BLOCK_HEADERS_PACKET, rlp)))
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}
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/// Respond to GetBlockBodies request
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fn return_block_bodies(io: &SyncIo, r: &UntrustedRlp, peer_id: PeerId) -> RlpResponseResult {
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let mut count = r.item_count();
if count == 0 {
debug!(target: "sync", "Empty GetBlockBodies request, ignoring.");
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return Ok(None);
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}
count = min(count, MAX_BODIES_TO_SEND);
let mut added = 0usize;
let mut data = Bytes::new();
for i in 0..count {
if let Some(mut hdr) = io.chain().block_body(BlockID::Hash(try!(r.val_at::<H256>(i)))) {
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data.append(&mut hdr);
added += 1;
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}
}
let mut rlp = RlpStream::new_list(added);
rlp.append_raw(&data, added);
trace!(target: "sync", "{} -> GetBlockBodies: returned {} entries", peer_id, added);
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Ok(Some((BLOCK_BODIES_PACKET, rlp)))
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}
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/// Respond to GetNodeData request
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fn return_node_data(io: &SyncIo, r: &UntrustedRlp, peer_id: PeerId) -> RlpResponseResult {
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let mut count = r.item_count();
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trace!(target: "sync", "{} -> GetNodeData: {} entries", peer_id, count);
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if count == 0 {
debug!(target: "sync", "Empty GetNodeData request, ignoring.");
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return Ok(None);
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}
count = min(count, MAX_NODE_DATA_TO_SEND);
let mut added = 0usize;
let mut data = Bytes::new();
for i in 0..count {
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if let Some(mut hdr) = io.chain().state_data(&try!(r.val_at::<H256>(i))) {
data.append(&mut hdr);
added += 1;
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}
}
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trace!(target: "sync", "{} -> GetNodeData: return {} entries", peer_id, added);
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let mut rlp = RlpStream::new_list(added);
rlp.append_raw(&data, added);
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Ok(Some((NODE_DATA_PACKET, rlp)))
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}
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fn return_receipts(io: &SyncIo, rlp: &UntrustedRlp, peer_id: PeerId) -> RlpResponseResult {
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let mut count = rlp.item_count();
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trace!(target: "sync", "{} -> GetReceipts: {} entries", peer_id, count);
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if count == 0 {
debug!(target: "sync", "Empty GetReceipts request, ignoring.");
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return Ok(None);
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}
count = min(count, MAX_RECEIPTS_HEADERS_TO_SEND);
let mut added_headers = 0usize;
let mut added_receipts = 0usize;
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let mut data = Bytes::new();
for i in 0..count {
if let Some(mut receipts_bytes) = io.chain().block_receipts(&try!(rlp.val_at::<H256>(i))) {
data.append(&mut receipts_bytes);
added_receipts += receipts_bytes.len();
added_headers += 1;
if added_receipts > MAX_RECEIPTS_TO_SEND { break; }
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}
}
let mut rlp_result = RlpStream::new_list(added_headers);
rlp_result.append_raw(&data, added_headers);
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Ok(Some((RECEIPTS_PACKET, rlp_result)))
}
/// Respond to GetSnapshotManifest request
fn return_snapshot_manifest(io: &SyncIo, r: &UntrustedRlp, peer_id: PeerId) -> RlpResponseResult {
let count = r.item_count();
trace!(target: "sync", "{} -> GetSnapshotManifest", peer_id);
if count != 0 {
debug!(target: "sync", "Invalid GetSnapshotManifest request, ignoring.");
return Ok(None);
}
let rlp = match io.snapshot_service().manifest() {
Some(manifest) => {
trace!(target: "sync", "{} <- SnapshotManifest", peer_id);
let mut rlp = RlpStream::new_list(1);
rlp.append_raw(&manifest.into_rlp(), 1);
rlp
},
None => {
trace!(target: "sync", "{}: No manifest to return", peer_id);
RlpStream::new_list(0)
}
};
Ok(Some((SNAPSHOT_MANIFEST_PACKET, rlp)))
}
/// Respond to GetSnapshotData request
fn return_snapshot_data(io: &SyncIo, r: &UntrustedRlp, peer_id: PeerId) -> RlpResponseResult {
let hash: H256 = try!(r.val_at(0));
trace!(target: "sync", "{} -> GetSnapshotData {:?}", peer_id, hash);
let rlp = match io.snapshot_service().chunk(hash) {
Some(data) => {
let mut rlp = RlpStream::new_list(1);
trace!(target: "sync", "{} <- SnapshotData", peer_id);
rlp.append(&data);
rlp
},
None => {
RlpStream::new_list(0)
}
};
Ok(Some((SNAPSHOT_DATA_PACKET, rlp)))
}
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fn return_rlp<FRlp, FError>(io: &mut SyncIo, rlp: &UntrustedRlp, peer: PeerId, rlp_func: FRlp, error_func: FError) -> Result<(), PacketDecodeError>
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where FRlp : Fn(&SyncIo, &UntrustedRlp, PeerId) -> RlpResponseResult,
FError : FnOnce(NetworkError) -> String
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{
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let response = rlp_func(io, rlp, peer);
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match response {
Err(e) => Err(e),
Ok(Some((packet_id, rlp_stream))) => {
io.respond(packet_id, rlp_stream.out()).unwrap_or_else(
|e| debug!(target: "sync", "{:?}", error_func(e)));
Ok(())
}
_ => Ok(())
}
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}
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/// Dispatch incoming requests and responses
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pub fn dispatch_packet(sync: &RwLock<ChainSync>, io: &mut SyncIo, peer: PeerId, packet_id: u8, data: &[u8]) {
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let rlp = UntrustedRlp::new(data);
let result = match packet_id {
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GET_BLOCK_BODIES_PACKET => ChainSync::return_rlp(io, &rlp, peer,
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ChainSync::return_block_bodies,
|e| format!("Error sending block bodies: {:?}", e)),
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GET_BLOCK_HEADERS_PACKET => ChainSync::return_rlp(io, &rlp, peer,
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ChainSync::return_block_headers,
|e| format!("Error sending block headers: {:?}", e)),
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GET_RECEIPTS_PACKET => ChainSync::return_rlp(io, &rlp, peer,
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ChainSync::return_receipts,
|e| format!("Error sending receipts: {:?}", e)),
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GET_NODE_DATA_PACKET => ChainSync::return_rlp(io, &rlp, peer,
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ChainSync::return_node_data,
|e| format!("Error sending nodes: {:?}", e)),
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GET_SNAPSHOT_MANIFEST_PACKET => ChainSync::return_rlp(io, &rlp, peer,
ChainSync::return_snapshot_manifest,
|e| format!("Error sending snapshot manifest: {:?}", e)),
GET_SNAPSHOT_DATA_PACKET => ChainSync::return_rlp(io, &rlp, peer,
ChainSync::return_snapshot_data,
|e| format!("Error sending snapshot data: {:?}", e)),
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_ => {
sync.write().on_packet(io, peer, packet_id, data);
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Ok(())
}
};
result.unwrap_or_else(|e| {
debug!(target:"sync", "{} -> Malformed packet {} : {}", peer, packet_id, e);
})
}
pub fn on_packet(&mut self, io: &mut SyncIo, peer: PeerId, packet_id: u8, data: &[u8]) {
if packet_id != STATUS_PACKET && !self.peers.contains_key(&peer) {
debug!(target:"sync", "Unexpected packet from unregistered peer: {}:{}", peer, io.peer_info(peer));
return;
}
let rlp = UntrustedRlp::new(data);
let result = match packet_id {
STATUS_PACKET => self.on_peer_status(io, peer, &rlp),
TRANSACTIONS_PACKET => self.on_peer_transactions(io, peer, &rlp),
BLOCK_HEADERS_PACKET => self.on_peer_block_headers(io, peer, &rlp),
BLOCK_BODIES_PACKET => self.on_peer_block_bodies(io, peer, &rlp),
RECEIPTS_PACKET => self.on_peer_block_receipts(io, peer, &rlp),
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NEW_BLOCK_PACKET => self.on_peer_new_block(io, peer, &rlp),
NEW_BLOCK_HASHES_PACKET => self.on_peer_new_hashes(io, peer, &rlp),
SNAPSHOT_MANIFEST_PACKET => self.on_snapshot_manifest(io, peer, &rlp),
SNAPSHOT_DATA_PACKET => self.on_snapshot_data(io, peer, &rlp),
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_ => {
debug!(target: "sync", "{}: Unknown packet {}", peer, packet_id);
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Ok(())
}
};
result.unwrap_or_else(|e| {
debug!(target:"sync", "{} -> Malformed packet {} : {}", peer, packet_id, e);
})
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}
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#[cfg_attr(feature="dev", allow(match_same_arms))]
pub fn maintain_peers(&mut self, io: &mut SyncIo) {
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let tick = time::precise_time_s();
let mut aborting = Vec::new();
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for (peer_id, peer) in &self.peers {
let timeout = match peer.asking {
PeerAsking::BlockHeaders => (tick - peer.ask_time) > HEADERS_TIMEOUT_SEC,
PeerAsking::BlockBodies => (tick - peer.ask_time) > BODIES_TIMEOUT_SEC,
PeerAsking::BlockReceipts => (tick - peer.ask_time) > RECEIPTS_TIMEOUT_SEC,
PeerAsking::Nothing => false,
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PeerAsking::ForkHeader => (tick - peer.ask_time) > FORK_HEADER_TIMEOUT_SEC,
PeerAsking::SnapshotManifest => (tick - peer.ask_time) > SNAPSHOT_MANIFEST_TIMEOUT_SEC,
PeerAsking::SnapshotData => (tick - peer.ask_time) > SNAPSHOT_DATA_TIMEOUT_SEC,
};
if timeout {
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trace!(target:"sync", "Timeout {}", peer_id);
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io.disconnect_peer(*peer_id);
aborting.push(*peer_id);
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}
}
for p in aborting {
self.on_peer_aborting(io, p);
}
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}
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fn check_resume(&mut self, io: &mut SyncIo) {
if self.state == SyncState::Waiting && !io.chain().queue_info().is_full() && self.state == SyncState::Waiting {
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self.state = SyncState::Blocks;
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self.continue_sync(io);
} else if self.state == SyncState::SnapshotWaiting && io.snapshot_service().status() == RestorationStatus::Inactive {
trace!(target:"sync", "Snapshot restoration is complete");
self.restart(io);
self.continue_sync(io);
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}
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}
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/// creates rlp to send for the tree defined by 'from' and 'to' hashes
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fn create_new_hashes_rlp(chain: &BlockChainClient, from: &H256, to: &H256) -> Option<Bytes> {
match chain.tree_route(from, to) {
Some(route) => {
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let uncles = chain.find_uncles(from).unwrap_or_else(Vec::new);
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match route.blocks.len() {
0 => None,
_ => {
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let mut blocks = route.blocks;
blocks.extend(uncles);
let mut rlp_stream = RlpStream::new_list(blocks.len());
for block_hash in blocks {
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let mut hash_rlp = RlpStream::new_list(2);
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let number = HeaderView::new(&chain.block_header(BlockID::Hash(block_hash.clone()))
.expect("chain.tree_route and chain.find_uncles only return hahses of blocks that are in the blockchain. qed.")).number();
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hash_rlp.append(&block_hash);
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hash_rlp.append(&number);
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rlp_stream.append_raw(hash_rlp.as_raw(), 1);
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}
Some(rlp_stream.out())
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}
}
},
None => None
}
}
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/// creates latest block rlp for the given client
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fn create_latest_block_rlp(chain: &BlockChainClient) -> Bytes {
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let mut rlp_stream = RlpStream::new_list(2);
rlp_stream.append_raw(&chain.block(BlockID::Hash(chain.chain_info().best_block_hash)).expect("Best block always exists"), 1);
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rlp_stream.append(&chain.chain_info().total_difficulty);
rlp_stream.out()
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}
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/// creates latest block rlp for the given client
fn create_new_block_rlp(chain: &BlockChainClient, hash: &H256) -> Bytes {
let mut rlp_stream = RlpStream::new_list(2);
rlp_stream.append_raw(&chain.block(BlockID::Hash(hash.clone())).expect("Block has just been sealed; qed"), 1);
rlp_stream.append(&chain.block_total_difficulty(BlockID::Hash(hash.clone())).expect("Block has just been sealed; qed."));
rlp_stream.out()
}
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/// returns peer ids that have less blocks than our chain
fn get_lagging_peers(&mut self, chain_info: &BlockChainInfo, io: &SyncIo) -> Vec<PeerId> {
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let latest_hash = chain_info.best_block_hash;
self.peers.iter_mut().filter_map(|(&id, ref mut peer_info)|
match io.chain().block_status(BlockID::Hash(peer_info.latest_hash.clone())) {
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BlockStatus::InChain => {
if peer_info.latest_hash != latest_hash {
Some(id)
} else {
None
}
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},
_ => None
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})
.collect::<Vec<_>>()
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}
fn select_random_lagging_peers(&mut self, peers: &[PeerId]) -> Vec<PeerId> {
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use rand::Rng;
// take sqrt(x) peers
let mut peers = peers.to_vec();
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let mut count = (self.peers.len() as f64).powf(0.5).round() as usize;
count = min(count, MAX_PEERS_PROPAGATION);
count = max(count, MIN_PEERS_PROPAGATION);
::rand::thread_rng().shuffle(&mut peers);
peers.truncate(count);
peers
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}
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/// propagates latest block to lagging peers
fn propagate_blocks(&mut self, chain_info: &BlockChainInfo, io: &mut SyncIo, sealed: &[H256], peers: &[PeerId]) -> usize {
trace!(target: "sync", "Sending NewBlocks to {:?}", peers);
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let mut sent = 0;
for peer_id in peers {
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if sealed.is_empty() {
let rlp = ChainSync::create_latest_block_rlp(io.chain());
self.send_packet(io, *peer_id, NEW_BLOCK_PACKET, rlp);
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} else {
for h in sealed {
let rlp = ChainSync::create_new_block_rlp(io.chain(), h);
self.send_packet(io, *peer_id, NEW_BLOCK_PACKET, rlp);
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}
}
if let Some(ref mut peer) = self.peers.get_mut(&peer_id) {
peer.latest_hash = chain_info.best_block_hash.clone();
}
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sent += 1;
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}
sent
}
/// propagates new known hashes to all peers
fn propagate_new_hashes(&mut self, chain_info: &BlockChainInfo, io: &mut SyncIo, peers: &[PeerId]) -> usize {
trace!(target: "sync", "Sending NewHashes to {:?}", peers);
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let mut sent = 0;
let last_parent = HeaderView::new(&io.chain().block_header(BlockID::Hash(chain_info.best_block_hash.clone()))
.expect("Best block always exists")).parent_hash();
for peer_id in peers {
sent += match ChainSync::create_new_hashes_rlp(io.chain(), &last_parent, &chain_info.best_block_hash) {
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Some(rlp) => {
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{
if let Some(ref mut peer) = self.peers.get_mut(&peer_id) {
peer.latest_hash = chain_info.best_block_hash.clone();
}
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}
self.send_packet(io, *peer_id, NEW_BLOCK_HASHES_PACKET, rlp);
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1
},
None => 0
}
}
sent
}
/// propagates new transactions to all peers
pub fn propagate_new_transactions(&mut self, io: &mut SyncIo) -> usize {
// Early out of nobody to send to.
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if self.peers.is_empty() {
return 0;
}
let transactions = io.chain().pending_transactions();
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if transactions.is_empty() {
return 0;
}
let all_transactions_hashes = transactions.iter().map(|tx| tx.hash()).collect::<HashSet<H256>>();
let all_transactions_rlp = {
let mut packet = RlpStream::new_list(transactions.len());
for tx in &transactions { packet.append(tx); }
packet.out()
};
// sqrt(x)/x scaled to max u32
let fraction = (self.peers.len() as f64).powf(-0.5).mul(u32::max_value() as f64).round() as u32;
let small = self.peers.len() < MIN_PEERS_PROPAGATION;
let lucky_peers = self.peers.iter_mut()
.filter(|_| small || ::rand::random::<u32>() < fraction)
.take(MAX_PEERS_PROPAGATION)
.filter_map(|(peer_id, mut peer_info)| {
// Send all transactions
if peer_info.last_sent_transactions.is_empty() {
peer_info.last_sent_transactions = all_transactions_hashes.clone();
return Some((*peer_id, all_transactions_rlp.clone()));
}
// Get hashes of all transactions to send to this peer
let to_send = all_transactions_hashes.difference(&peer_info.last_sent_transactions).cloned().collect::<HashSet<_>>();
if to_send.is_empty() {
return None;
}
// Construct RLP
let mut packet = RlpStream::new_list(to_send.len());
for tx in &transactions {
if to_send.contains(&tx.hash()) {
packet.append(tx);
}
}
peer_info.last_sent_transactions = all_transactions_hashes.clone();
Some((*peer_id, packet.out()))
})
.collect::<Vec<_>>();
// Send RLPs
let sent = lucky_peers.len();
if sent > 0 {
for (peer_id, rlp) in lucky_peers.into_iter() {
self.send_packet(io, peer_id, TRANSACTIONS_PACKET, rlp);
}
trace!(target: "sync", "Sent up to {} transactions to {} peers.", transactions.len(), sent);
}
sent
}
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fn propagate_latest_blocks(&mut self, io: &mut SyncIo, sealed: &[H256]) {
let chain_info = io.chain().chain_info();
if (((chain_info.best_block_number as i64) - (self.last_sent_block_number as i64)).abs() as BlockNumber) < MAX_PEER_LAG_PROPAGATION {
let mut peers = self.get_lagging_peers(&chain_info, io);
if sealed.is_empty() {
let hashes = self.propagate_new_hashes(&chain_info, io, &peers);
peers = self.select_random_lagging_peers(&peers);
let blocks = self.propagate_blocks(&chain_info, io, sealed, &peers);
if blocks != 0 || hashes != 0 {
trace!(target: "sync", "Sent latest {} blocks and {} hashes to peers.", blocks, hashes);
}
} else {
self.propagate_blocks(&chain_info, io, sealed, &peers);
self.propagate_new_hashes(&chain_info, io, &peers);
trace!(target: "sync", "Sent sealed block to all peers");
};
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}
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self.propagate_new_transactions(io);
self.last_sent_block_number = chain_info.best_block_number;
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}
/// Maintain other peers. Send out any new blocks and transactions
pub fn maintain_sync(&mut self, io: &mut SyncIo) {
self.check_resume(io);
}
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/// called when block is imported to chain - propagates the blocks and updates transactions sent to peers
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pub fn chain_new_blocks(&mut self, io: &mut SyncIo, _imported: &[H256], invalid: &[H256], _enacted: &[H256], _retracted: &[H256], sealed: &[H256]) {
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if io.is_chain_queue_empty() {
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self.propagate_latest_blocks(io, sealed);
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}
if !invalid.is_empty() {
trace!(target: "sync", "Bad blocks in the queue, restarting");
self.restart(io);
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}
for peer_info in self.peers.values_mut() {
peer_info.last_sent_transactions.clear();
}
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}
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}
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#[cfg(test)]
mod tests {
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use tests::helpers::*;
use tests::snapshot::TestSnapshotService;
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use super::*;
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use ::SyncConfig;
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use util::*;
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use rlp::*;
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use super::{PeerInfo, PeerAsking};
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use ethcore::views::BlockView;
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use ethcore::header::*;
use ethcore::client::*;
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use ethcore::miner::MinerService;
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fn get_dummy_block(order: u32, parent_hash: H256) -> Bytes {
let mut header = Header::new();
header.set_gas_limit(0.into());
header.set_difficulty((order * 100).into());
header.set_timestamp((order * 10) as u64);
header.set_number(order as u64);
header.set_parent_hash(parent_hash);
header.set_state_root(H256::zero());
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let mut rlp = RlpStream::new_list(3);
rlp.append(&header);
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rlp.append_raw(&::rlp::EMPTY_LIST_RLP, 1);
rlp.append_raw(&::rlp::EMPTY_LIST_RLP, 1);
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rlp.out()
}
fn get_dummy_blocks(order: u32, parent_hash: H256) -> Bytes {
let mut rlp = RlpStream::new_list(1);
rlp.append_raw(&get_dummy_block(order, parent_hash), 1);
let difficulty: U256 = (100 * order).into();
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rlp.append(&difficulty);
rlp.out()
}
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fn get_dummy_hashes() -> Bytes {
let mut rlp = RlpStream::new_list(5);
for _ in 0..5 {
let mut hash_d_rlp = RlpStream::new_list(2);
let hash: H256 = H256::from(0u64);
let diff: U256 = U256::from(1u64);
hash_d_rlp.append(&hash);
hash_d_rlp.append(&diff);
rlp.append_raw(&hash_d_rlp.out(), 1);
}
rlp.out()
}
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#[test]
fn return_receipts_empty() {
let mut client = TestBlockChainClient::new();
let mut queue = VecDeque::new();
let ss = TestSnapshotService::new();
let io = TestIo::new(&mut client, &ss, &mut queue, None);
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let result = ChainSync::return_receipts(&io, &UntrustedRlp::new(&[0xc0]), 0);
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assert!(result.is_ok());
}
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#[test]
fn return_receipts() {
let mut client = TestBlockChainClient::new();
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let mut queue = VecDeque::new();
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let sync = dummy_sync_with_peer(H256::new(), &client);
let ss = TestSnapshotService::new();
let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
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let mut receipt_list = RlpStream::new_list(4);
receipt_list.append(&H256::from("0000000000000000000000000000000000000000000000005555555555555555"));
receipt_list.append(&H256::from("ff00000000000000000000000000000000000000000000000000000000000000"));
receipt_list.append(&H256::from("fff0000000000000000000000000000000000000000000000000000000000000"));
receipt_list.append(&H256::from("aff0000000000000000000000000000000000000000000000000000000000000"));
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let receipts_request = receipt_list.out();
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// it returns rlp ONLY for hashes started with "f"
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let result = ChainSync::return_receipts(&io, &UntrustedRlp::new(&receipts_request.clone()), 0);
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assert!(result.is_ok());
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let rlp_result = result.unwrap();
assert!(rlp_result.is_some());
// the length of two rlp-encoded receipts
assert_eq!(603, rlp_result.unwrap().1.out().len());
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io.sender = Some(2usize);
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ChainSync::dispatch_packet(&RwLock::new(sync), &mut io, 0usize, super::GET_RECEIPTS_PACKET, &receipts_request);
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assert_eq!(1, io.queue.len());
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}
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#[test]
fn return_block_headers() {
use ethcore::views::HeaderView;
fn make_hash_req(h: &H256, count: usize, skip: usize, reverse: bool) -> Bytes {
let mut rlp = RlpStream::new_list(4);
rlp.append(h);
rlp.append(&count);
rlp.append(&skip);
rlp.append(&if reverse {1u32} else {0u32});
rlp.out()
}
fn make_num_req(n: usize, count: usize, skip: usize, reverse: bool) -> Bytes {
let mut rlp = RlpStream::new_list(4);
rlp.append(&n);
rlp.append(&count);
rlp.append(&skip);
rlp.append(&if reverse {1u32} else {0u32});
rlp.out()
}
fn to_header_vec(rlp: ::chain::RlpResponseResult) -> Vec<Bytes> {
Rlp::new(&rlp.unwrap().unwrap().1.out()).iter().map(|r| r.as_raw().to_vec()).collect()
}
let mut client = TestBlockChainClient::new();
client.add_blocks(100, EachBlockWith::Nothing);
let blocks: Vec<_> = (0 .. 100).map(|i| (&client as &BlockChainClient).block(BlockID::Number(i as BlockNumber)).unwrap()).collect();
let headers: Vec<_> = blocks.iter().map(|b| Rlp::new(b).at(0).as_raw().to_vec()).collect();
let hashes: Vec<_> = headers.iter().map(|h| HeaderView::new(h).sha3()).collect();
let mut queue = VecDeque::new();
let ss = TestSnapshotService::new();
let io = TestIo::new(&mut client, &ss, &mut queue, None);
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let unknown: H256 = H256::new();
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let result = ChainSync::return_block_headers(&io, &UntrustedRlp::new(&make_hash_req(&unknown, 1, 0, false)), 0);
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assert!(to_header_vec(result).is_empty());
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let result = ChainSync::return_block_headers(&io, &UntrustedRlp::new(&make_hash_req(&unknown, 1, 0, true)), 0);
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assert!(to_header_vec(result).is_empty());
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let result = ChainSync::return_block_headers(&io, &UntrustedRlp::new(&make_hash_req(&hashes[2], 1, 0, true)), 0);
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assert_eq!(to_header_vec(result), vec![headers[2].clone()]);
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let result = ChainSync::return_block_headers(&io, &UntrustedRlp::new(&make_hash_req(&hashes[2], 1, 0, false)), 0);
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assert_eq!(to_header_vec(result), vec![headers[2].clone()]);
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let result = ChainSync::return_block_headers(&io, &UntrustedRlp::new(&make_hash_req(&hashes[50], 3, 5, false)), 0);
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assert_eq!(to_header_vec(result), vec![headers[50].clone(), headers[56].clone(), headers[62].clone()]);
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let result = ChainSync::return_block_headers(&io, &UntrustedRlp::new(&make_hash_req(&hashes[50], 3, 5, true)), 0);
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assert_eq!(to_header_vec(result), vec![headers[50].clone(), headers[44].clone(), headers[38].clone()]);
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let result = ChainSync::return_block_headers(&io, &UntrustedRlp::new(&make_num_req(2, 1, 0, true)), 0);
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assert_eq!(to_header_vec(result), vec![headers[2].clone()]);
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let result = ChainSync::return_block_headers(&io, &UntrustedRlp::new(&make_num_req(2, 1, 0, false)), 0);
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assert_eq!(to_header_vec(result), vec![headers[2].clone()]);
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let result = ChainSync::return_block_headers(&io, &UntrustedRlp::new(&make_num_req(50, 3, 5, false)), 0);
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assert_eq!(to_header_vec(result), vec![headers[50].clone(), headers[56].clone(), headers[62].clone()]);
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let result = ChainSync::return_block_headers(&io, &UntrustedRlp::new(&make_num_req(50, 3, 5, true)), 0);
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assert_eq!(to_header_vec(result), vec![headers[50].clone(), headers[44].clone(), headers[38].clone()]);
}
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#[test]
fn return_nodes() {
let mut client = TestBlockChainClient::new();
let mut queue = VecDeque::new();
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let sync = dummy_sync_with_peer(H256::new(), &client);
let ss = TestSnapshotService::new();
let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
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let mut node_list = RlpStream::new_list(3);
node_list.append(&H256::from("0000000000000000000000000000000000000000000000005555555555555555"));
node_list.append(&H256::from("ffffffffffffffffffffffffffffffffffffffffffffaaaaaaaaaaaaaaaaaaaa"));
node_list.append(&H256::from("aff0000000000000000000000000000000000000000000000000000000000000"));
let node_request = node_list.out();
// it returns rlp ONLY for hashes started with "f"
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let result = ChainSync::return_node_data(&io, &UntrustedRlp::new(&node_request.clone()), 0);
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assert!(result.is_ok());
let rlp_result = result.unwrap();
assert!(rlp_result.is_some());
// the length of one rlp-encoded hashe
assert_eq!(34, rlp_result.unwrap().1.out().len());
io.sender = Some(2usize);
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ChainSync::dispatch_packet(&RwLock::new(sync), &mut io, 0usize, super::GET_NODE_DATA_PACKET, &node_request);
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assert_eq!(1, io.queue.len());
}
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fn dummy_sync_with_peer(peer_latest_hash: H256, client: &BlockChainClient) -> ChainSync {
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let mut sync = ChainSync::new(SyncConfig::default(), client);
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sync.peers.insert(0,
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PeerInfo {
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protocol_version: 0,
genesis: H256::zero(),
network_id: U256::zero(),
latest_hash: peer_latest_hash,
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difficulty: None,
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asking: PeerAsking::Nothing,
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asking_blocks: Vec::new(),
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asking_hash: None,
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ask_time: 0f64,
last_sent_transactions: HashSet::new(),
expired: false,
confirmation: super::ForkConfirmation::Confirmed,
snapshot_number: None,
snapshot_hash: None,
asking_snapshot_data: None,
block_set: None,
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});
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sync
}
#[test]
fn finds_lagging_peers() {
let mut client = TestBlockChainClient::new();
client.add_blocks(100, EachBlockWith::Uncle);
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let mut queue = VecDeque::new();
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let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(10), &client);
let chain_info = client.chain_info();
let ss = TestSnapshotService::new();
let io = TestIo::new(&mut client, &ss, &mut queue, None);
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let lagging_peers = sync.get_lagging_peers(&chain_info, &io);
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assert_eq!(1, lagging_peers.len())
}
#[test]
fn calculates_tree_for_lagging_peer() {
let mut client = TestBlockChainClient::new();
client.add_blocks(15, EachBlockWith::Uncle);
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let start = client.block_hash_delta_minus(4);
let end = client.block_hash_delta_minus(2);
// wrong way end -> start, should be None
let rlp = ChainSync::create_new_hashes_rlp(&client, &end, &start);
assert!(rlp.is_none());
let rlp = ChainSync::create_new_hashes_rlp(&client, &start, &end).unwrap();
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// size of three rlp encoded hash-difficulty
assert_eq!(107, rlp.len());
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}
#[test]
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fn sends_new_hashes_to_lagging_peer() {
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let mut client = TestBlockChainClient::new();
client.add_blocks(100, EachBlockWith::Uncle);
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let mut queue = VecDeque::new();
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let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(5), &client);
let chain_info = client.chain_info();
let ss = TestSnapshotService::new();
let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
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let peers = sync.get_lagging_peers(&chain_info, &io);
let peer_count = sync.propagate_new_hashes(&chain_info, &mut io, &peers);
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// 1 message should be send
assert_eq!(1, io.queue.len());
// 1 peer should be updated
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assert_eq!(1, peer_count);
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// NEW_BLOCK_HASHES_PACKET
assert_eq!(0x01, io.queue[0].packet_id);
}
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#[test]
fn sends_latest_block_to_lagging_peer() {
let mut client = TestBlockChainClient::new();
client.add_blocks(100, EachBlockWith::Uncle);
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let mut queue = VecDeque::new();
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let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(5), &client);
let chain_info = client.chain_info();
let ss = TestSnapshotService::new();
let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
let peers = sync.get_lagging_peers(&chain_info, &io);
let peer_count = sync.propagate_blocks(&chain_info, &mut io, &[], &peers);
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// 1 message should be send
assert_eq!(1, io.queue.len());
// 1 peer should be updated
assert_eq!(1, peer_count);
// NEW_BLOCK_PACKET
assert_eq!(0x07, io.queue[0].packet_id);
}
#[test]
fn sends_sealed_block() {
let mut client = TestBlockChainClient::new();
client.add_blocks(100, EachBlockWith::Uncle);
let mut queue = VecDeque::new();
let hash = client.block_hash(BlockID::Number(99)).unwrap();
let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(5), &client);
let chain_info = client.chain_info();
let ss = TestSnapshotService::new();
let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
let peers = sync.get_lagging_peers(&chain_info, &io);
let peer_count = sync.propagate_blocks(&chain_info, &mut io, &[hash.clone()], &peers);
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// 1 message should be send
assert_eq!(1, io.queue.len());
// 1 peer should be updated
assert_eq!(1, peer_count);
// NEW_BLOCK_PACKET
assert_eq!(0x07, io.queue[0].packet_id);
}
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#[test]
fn propagates_transactions() {
let mut client = TestBlockChainClient::new();
client.add_blocks(100, EachBlockWith::Uncle);
client.insert_transaction_to_queue();
let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(1), &client);
let mut queue = VecDeque::new();
let ss = TestSnapshotService::new();
let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
let peer_count = sync.propagate_new_transactions(&mut io);
// Try to propagate same transactions for the second time
let peer_count2 = sync.propagate_new_transactions(&mut io);
// 1 message should be send
assert_eq!(1, io.queue.len());
// 1 peer should be updated but only once
assert_eq!(1, peer_count);
assert_eq!(0, peer_count2);
// TRANSACTIONS_PACKET
assert_eq!(0x02, io.queue[0].packet_id);
}
#[test]
fn propagates_transactions_again_after_new_block() {
let mut client = TestBlockChainClient::new();
client.add_blocks(100, EachBlockWith::Uncle);
client.insert_transaction_to_queue();
let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(1), &client);
let mut queue = VecDeque::new();
let ss = TestSnapshotService::new();
let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
let peer_count = sync.propagate_new_transactions(&mut io);
sync.chain_new_blocks(&mut io, &[], &[], &[], &[], &[]);
// Try to propagate same transactions for the second time
let peer_count2 = sync.propagate_new_transactions(&mut io);
// 2 message should be send
assert_eq!(2, io.queue.len());
// 1 peer should be updated twice
assert_eq!(1, peer_count);
assert_eq!(1, peer_count2);
// TRANSACTIONS_PACKET
assert_eq!(0x02, io.queue[0].packet_id);
assert_eq!(0x02, io.queue[1].packet_id);
}
#[test]
fn propagates_transactions_without_alternating() {
let mut client = TestBlockChainClient::new();
client.add_blocks(100, EachBlockWith::Uncle);
client.insert_transaction_to_queue();
let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(1), &client);
let mut queue = VecDeque::new();
let ss = TestSnapshotService::new();
// should sent some
{
let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
let peer_count = sync.propagate_new_transactions(&mut io);
assert_eq!(1, io.queue.len());
assert_eq!(1, peer_count);
}
// Insert some more
client.insert_transaction_to_queue();
let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
// Propagate new transactions
let peer_count2 = sync.propagate_new_transactions(&mut io);
// And now the peer should have all transactions
let peer_count3 = sync.propagate_new_transactions(&mut io);
// 2 message should be send (in total)
assert_eq!(2, io.queue.len());
// 1 peer should be updated but only once after inserting new transaction
assert_eq!(1, peer_count2);
assert_eq!(0, peer_count3);
// TRANSACTIONS_PACKET
assert_eq!(0x02, io.queue[0].packet_id);
assert_eq!(0x02, io.queue[1].packet_id);
}
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#[test]
fn handles_peer_new_block_malformed() {
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let mut client = TestBlockChainClient::new();
client.add_blocks(10, EachBlockWith::Uncle);
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let block_data = get_dummy_block(11, client.chain_info().best_block_hash);
let mut queue = VecDeque::new();
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let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(5), &client);
//sync.have_common_block = true;
let ss = TestSnapshotService::new();
let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
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let block = UntrustedRlp::new(&block_data);
let result = sync.on_peer_new_block(&mut io, 0, &block);
assert!(result.is_err());
}
#[test]
fn handles_peer_new_block() {
let mut client = TestBlockChainClient::new();
client.add_blocks(10, EachBlockWith::Uncle);
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let block_data = get_dummy_blocks(11, client.chain_info().best_block_hash);
let mut queue = VecDeque::new();
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let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(5), &client);
let ss = TestSnapshotService::new();
let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
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let block = UntrustedRlp::new(&block_data);
let result = sync.on_peer_new_block(&mut io, 0, &block);
assert!(result.is_ok());
}
#[test]
fn handles_peer_new_block_empty() {
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let mut client = TestBlockChainClient::new();
client.add_blocks(10, EachBlockWith::Uncle);
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let mut queue = VecDeque::new();
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let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(5), &client);
let ss = TestSnapshotService::new();
let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
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let empty_data = vec![];
let block = UntrustedRlp::new(&empty_data);
let result = sync.on_peer_new_block(&mut io, 0, &block);
assert!(result.is_err());
}
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#[test]
fn handles_peer_new_hashes() {
let mut client = TestBlockChainClient::new();
client.add_blocks(10, EachBlockWith::Uncle);
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let mut queue = VecDeque::new();
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let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(5), &client);
let ss = TestSnapshotService::new();
let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
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let hashes_data = get_dummy_hashes();
let hashes_rlp = UntrustedRlp::new(&hashes_data);
let result = sync.on_peer_new_hashes(&mut io, 0, &hashes_rlp);
assert!(result.is_ok());
}
#[test]
fn handles_peer_new_hashes_empty() {
let mut client = TestBlockChainClient::new();
client.add_blocks(10, EachBlockWith::Uncle);
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let mut queue = VecDeque::new();
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let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(5), &client);
let ss = TestSnapshotService::new();
let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
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let empty_hashes_data = vec![];
let hashes_rlp = UntrustedRlp::new(&empty_hashes_data);
let result = sync.on_peer_new_hashes(&mut io, 0, &hashes_rlp);
assert!(result.is_ok());
}
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// idea is that what we produce when propagading latest hashes should be accepted in
// on_peer_new_hashes in our code as well
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#[test]
fn hashes_rlp_mutually_acceptable() {
let mut client = TestBlockChainClient::new();
client.add_blocks(100, EachBlockWith::Uncle);
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let mut queue = VecDeque::new();
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let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(5), &client);
let chain_info = client.chain_info();
let ss = TestSnapshotService::new();
let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
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let peers = sync.get_lagging_peers(&chain_info, &io);
sync.propagate_new_hashes(&chain_info, &mut io, &peers);
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let data = &io.queue[0].data.clone();
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let result = sync.on_peer_new_hashes(&mut io, 0, &UntrustedRlp::new(data));
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assert!(result.is_ok());
}
// idea is that what we produce when propagading latest block should be accepted in
// on_peer_new_block in our code as well
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#[test]
fn block_rlp_mutually_acceptable() {
let mut client = TestBlockChainClient::new();
client.add_blocks(100, EachBlockWith::Uncle);
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let mut queue = VecDeque::new();
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let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(5), &client);
let chain_info = client.chain_info();
let ss = TestSnapshotService::new();
let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
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let peers = sync.get_lagging_peers(&chain_info, &io);
sync.propagate_blocks(&chain_info, &mut io, &[], &peers);
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let data = &io.queue[0].data.clone();
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let result = sync.on_peer_new_block(&mut io, 0, &UntrustedRlp::new(data));
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assert!(result.is_ok());
}
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#[test]
fn should_add_transactions_to_queue() {
// given
let mut client = TestBlockChainClient::new();
client.add_blocks(98, EachBlockWith::Uncle);
client.add_blocks(1, EachBlockWith::UncleAndTransaction);
client.add_blocks(1, EachBlockWith::Transaction);
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let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(5), &client);
let good_blocks = vec![client.block_hash_delta_minus(2)];
let retracted_blocks = vec![client.block_hash_delta_minus(1)];
// Add some balance to clients and reset nonces
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for h in &[good_blocks[0], retracted_blocks[0]] {
let block = client.block(BlockID::Hash(*h)).unwrap();
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let view = BlockView::new(&block);
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client.set_balance(view.transactions()[0].sender().unwrap(), U256::from(1_000_000_000));
client.set_nonce(view.transactions()[0].sender().unwrap(), U256::from(0));
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}
// when
{
let mut queue = VecDeque::new();
let ss = TestSnapshotService::new();
let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
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io.chain.miner.chain_new_blocks(io.chain, &[], &[], &[], &good_blocks);
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sync.chain_new_blocks(&mut io, &[], &[], &[], &good_blocks, &[]);
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assert_eq!(io.chain.miner.status().transactions_in_future_queue, 0);
assert_eq!(io.chain.miner.status().transactions_in_pending_queue, 1);
}
// We need to update nonce status (because we say that the block has been imported)
for h in &[good_blocks[0]] {
let block = client.block(BlockID::Hash(*h)).unwrap();
let view = BlockView::new(&block);
client.set_nonce(view.transactions()[0].sender().unwrap(), U256::from(1));
}
{
let mut queue = VecDeque::new();
let ss = TestSnapshotService::new();
let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
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io.chain.miner.chain_new_blocks(io.chain, &[], &[], &good_blocks, &retracted_blocks);
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sync.chain_new_blocks(&mut io, &[], &[], &good_blocks, &retracted_blocks, &[]);
}
// then
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let status = client.miner.status();
assert_eq!(status.transactions_in_pending_queue, 1);
assert_eq!(status.transactions_in_future_queue, 0);
}
#[test]
fn should_not_add_transactions_to_queue_if_not_synced() {
// given
let mut client = TestBlockChainClient::new();
client.add_blocks(98, EachBlockWith::Uncle);
client.add_blocks(1, EachBlockWith::UncleAndTransaction);
client.add_blocks(1, EachBlockWith::Transaction);
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let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(5), &client);
let good_blocks = vec![client.block_hash_delta_minus(2)];
let retracted_blocks = vec![client.block_hash_delta_minus(1)];
let mut queue = VecDeque::new();
let ss = TestSnapshotService::new();
let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
// when
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sync.chain_new_blocks(&mut io, &[], &[], &[], &good_blocks, &[]);
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assert_eq!(io.chain.miner.status().transactions_in_future_queue, 0);
assert_eq!(io.chain.miner.status().transactions_in_pending_queue, 0);
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sync.chain_new_blocks(&mut io, &[], &[], &good_blocks, &retracted_blocks, &[]);
// then
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let status = io.chain.miner.status();
assert_eq!(status.transactions_in_pending_queue, 0);
assert_eq!(status.transactions_in_future_queue, 0);
}
}