started sync

This commit is contained in:
arkpar 2015-12-22 22:19:50 +01:00
parent 18850c3197
commit fcba0122bc
6 changed files with 678 additions and 17 deletions

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@ -9,7 +9,7 @@ authors = ["Ethcore <admin@ethcore.io>"]
[dependencies] [dependencies]
log = "0.3" log = "0.3"
env_logger = "0.3" env_logger = "0.3"
ethcore-util = "0.1.0" ethcore-util = { path = "../ethcore-util" }
evmjit = { path = "rust-evmjit", optional = true } evmjit = { path = "rust-evmjit", optional = true }
rustc-serialize = "0.3" rustc-serialize = "0.3"

17
src/bin/client.rs Normal file
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@ -0,0 +1,17 @@
extern crate ethcore_util as util;
use std::io::*;
use util::network::{NetworkService};
fn main() {
let mut service = NetworkService::start().unwrap();
loop {
let mut cmd = String::new();
stdin().read_line(&mut cmd).unwrap();
if cmd == "quit" || cmd == "exit" || cmd == "q" {
break;
}
}
}

46
src/eth.rs Normal file
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@ -0,0 +1,46 @@
use util::hash::H256;
use util::bytes::Bytes;
use util::uint::U256;
pub enum QueueStatus {
/// Part of the known chain
Known,
/// Part of the unknown chain
Unknown,
}
pub enum BlockStatus {
InChain,
Queued(QueueStatus),
Bad,
}
pub struct BlockChainInfo {
pub total_difficulty: U256,
pub pending_total_difficulty: U256,
pub genesis_hash: H256,
pub last_block_hash: H256,
pub last_block_number: BlockNumber
}
pub struct BlockQueueStats;
pub struct TreeRoute;
pub type BlockNumber = u32;
pub type BlockHeader = ::blockheader::Header;
pub trait BlockChainClient : Sync {
fn block_header(&self, h: &H256) -> Option<BlockHeader>;
fn block_body(&self, h: &H256) -> Option<Bytes>;
fn block(&self, h: &H256) -> Option<Bytes>;
fn block_status(&self, h: &H256) -> BlockStatus;
fn block_header_at(&self, n: BlockNumber) -> Option<BlockHeader>;
fn block_body_at(&self, h: BlockNumber) -> Option<Bytes>;
fn block_at(&self, h: BlockNumber) -> Option<Bytes>;
fn block_status_at(&self, h: BlockNumber) -> Option<Bytes>;
fn tree_route(&self, from: &H256, to: &H256) -> TreeRoute;
fn import_block(&mut self, b: Bytes) -> BlockStatus;
fn queue_stats(&self) -> BlockQueueStats;
fn clear_queue(&mut self) -> BlockQueueStats;
fn info(&self) -> BlockChainInfo;
}

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@ -1,5 +1,5 @@
//! Ethcore's ethereum implementation //! Ethcore's ethereum implementation
//! //!
//! ### Rust version //! ### Rust version
//! - beta //! - beta
//! - nightly //! - nightly
@ -7,44 +7,44 @@
//! ### Supported platforms: //! ### Supported platforms:
//! - OSX //! - OSX
//! - Linux/Ubuntu //! - Linux/Ubuntu
//! //!
//! ### Dependencies: //! ### Dependencies:
//! - RocksDB 3.13 //! - RocksDB 3.13
//! - LLVM 3.7 (optional, required for `jit`) //! - LLVM 3.7 (optional, required for `jit`)
//! - evmjit (optional, required for `jit`) //! - evmjit (optional, required for `jit`)
//! //!
//! ### Dependencies Installation //! ### Dependencies Installation
//! //!
//! - OSX //! - OSX
//! //!
//! - rocksdb //! - rocksdb
//! ```bash //! ```bash
//! brew install rocksdb //! brew install rocksdb
//! ``` //! ```
//! //!
//! - llvm //! - llvm
//! //!
//! - download llvm 3.7 from http://llvm.org/apt/ //! - download llvm 3.7 from http://llvm.org/apt/
//! //!
//! ```bash //! ```bash
//! cd llvm-3.7.0.src //! cd llvm-3.7.0.src
//! mkdir build && cd $_ //! mkdir build && cd $_
//! cmake -G "Unix Makefiles" .. -DCMAKE_C_FLAGS_RELEASE= -DCMAKE_CXX_FLAGS_RELEASE= -DCMAKE_INSTALL_PREFIX=/usr/local/Cellar/llvm/3.7 -DCMAKE_BUILD_TYPE=Release //! cmake -G "Unix Makefiles" .. -DCMAKE_C_FLAGS_RELEASE= -DCMAKE_CXX_FLAGS_RELEASE= -DCMAKE_INSTALL_PREFIX=/usr/local/Cellar/llvm/3.7 -DCMAKE_BUILD_TYPE=Release
//! make && make install //! make && make install
//! ``` //! ```
//! - evmjit //! - evmjit
//! //!
//! - download from https://github.com/debris/evmjit //! - download from https://github.com/debris/evmjit
//! //!
//! ```bash //! ```bash
//! cd evmjit //! cd evmjit
//! mkdir build && cd $_ //! mkdir build && cd $_
//! cmake -DLLVM_DIR=/usr/local/lib/llvm-3.7/share/llvm/cmake .. //! cmake -DLLVM_DIR=/usr/local/lib/llvm-3.7/share/llvm/cmake ..
//! make && make install //! make && make install
//! ``` //! ```
//! //!
//! - Linux/Ubuntu //! - Linux/Ubuntu
//! //!
//! - rocksdb //! - rocksdb
//! //!
//! ```bash //! ```bash
@ -52,15 +52,15 @@
//! tar xvf rocksdb-3.13.tar.gz && cd rocksdb-rocksdb-3.13 && make shared_lib //! tar xvf rocksdb-3.13.tar.gz && cd rocksdb-rocksdb-3.13 && make shared_lib
//! sudo make install //! sudo make install
//! ``` //! ```
//! //!
//! - llvm //! - llvm
//! //!
//! - install using packages from http://llvm.org/apt/ //! - install using packages from http://llvm.org/apt/
//! //!
//! - evmjit //! - evmjit
//! //!
//! - download from https://github.com/debris/evmjit //! - download from https://github.com/debris/evmjit
//! //!
//! ```bash //! ```bash
//! cd evmjit //! cd evmjit
//! mkdir build && cd $_ //! mkdir build && cd $_
@ -88,6 +88,9 @@ pub mod blockheader;
pub mod transaction; pub mod transaction;
pub mod networkparams; pub mod networkparams;
pub mod denominations; pub mod denominations;
pub mod eth;
pub mod sync;
#[test] #[test]
fn it_works() { fn it_works() {

560
src/sync/chain.rs Normal file
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@ -0,0 +1,560 @@
use std::collections::{HashSet, HashMap};
use std::cmp::{min, max};
use std::ops::{Add, Sub};
use std::mem::{replace};
use util::network::{PeerId, HandlerIo, PacketId};
use util::hash::{H256};
use util::bytes::{Bytes};
use util::uint::{U256};
use util::rlp::{Rlp, RlpStream};
use util::rlp::rlptraits::{Stream, View};
use eth::{BlockNumber, BlockChainClient};
pub struct SyncIo<'s, 'h> where 'h:'s {
network: &'s mut HandlerIo<'h>,
chain: &'s mut BlockChainClient
}
impl<'s, 'h> SyncIo<'s, 'h> {
fn disable_peer(&mut self, peer_id: &PeerId) {
self.network.disable_peer(*peer_id);
}
}
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;
struct Header {
///Header data
data: Bytes,
/// Block hash
hash: H256,
/// Parent hash
parent: H256,
}
/// Used to identify header by transactions and uncles hashes
#[derive(Eq, PartialEq, Hash)]
struct HeaderId {
transactions_root: H256,
uncles: H256
}
#[derive(Copy, Clone, Eq, PartialEq, Debug)]
pub enum SyncState {
/// Initial chain sync has not started yet
NotSynced,
/// Initial chain sync complete. Waiting for new packets
Idle,
/// Block downloading paused. Waiting for block queue to process blocks and free space
Waiting,
/// Downloading blocks
Blocks,
/// Downloading blocks learned from NewHashes packet
NewBlocks,
}
pub struct SyncStatus {
state: SyncState,
protocol_version: u8,
start_block_number: BlockNumber,
current_block_number: BlockNumber,
highest_block_number: BlockNumber,
blocks_total: usize,
blocks_received: usize
}
#[derive(PartialEq, Eq, Debug)]
enum PeerAsking
{
Nothing,
State,
BlockHeaders,
BlockBodies,
}
struct PeerInfo {
protocol_version: u32,
genesis: H256,
network_id: U256,
latest: H256,
difficulty: U256,
asking: PeerAsking,
asking_blocks: Vec<BlockNumber>
}
type Body = Bytes;
pub struct ChainSync {
/// Sync state
state: SyncState,
/// Last block number for the start of sync
starting_block: BlockNumber,
/// Highest block number seen
highest_block: BlockNumber,
/// Set of block header numbers being downloaded
downloading_headers: HashSet<BlockNumber>,
/// Set of block body numbers being downloaded
downloading_bodies: HashSet<BlockNumber>,
/// Downloaded headers.
headers: Vec<(BlockNumber, Vec<Header>)>, //TODO: use BTreeMap once range API is sable. For now it a vector sorted in descending order
/// Downloaded bodies
bodies: Vec<(BlockNumber, Vec<Body>)>, //TODO: use BTreeMap once range API is sable. For now it a vector sorted in descending order
/// Peer info
peers: HashMap<PeerId, PeerInfo>,
/// Used to map body to header
header_ids: HashMap<HeaderId, BlockNumber>,
/// Last impoted block number
last_imported_block: BlockNumber,
/// Syncing total difficulty
syncing_difficulty: U256,
/// True if common block for our and remote chain has been found
have_common_block: bool,
}
impl ChainSync {
pub fn new(io: &mut SyncIo) -> ChainSync {
let mut sync = ChainSync {
state: SyncState::NotSynced,
starting_block: 0,
highest_block: 0,
downloading_headers: HashSet::new(),
downloading_bodies: HashSet::new(),
headers: Vec::new(),
bodies: Vec::new(),
peers: HashMap::new(),
header_ids: HashMap::new(),
last_imported_block: 0,
syncing_difficulty: U256::from(0u64),
have_common_block: false
};
sync.restart(io);
sync
}
/// @returns Synchonization status
pub fn status(&self) -> SyncStatus {
SyncStatus {
state: self.state.clone(),
protocol_version: 63,
start_block_number: self.starting_block,
current_block_number: 0, //TODO:
highest_block_number: self.highest_block,
blocks_total: (self.last_imported_block - self.starting_block) as usize,
blocks_received: (self.highest_block - self.starting_block) as usize
}
}
/// Abort all sync activity
pub fn abort(&mut self, io: &mut SyncIo) {
self.restart(io);
self.peers.clear();
}
/// @returns true is Sync is in progress
pub fn is_syncing(&self) {
self.state != SyncState::Idle;
}
fn reset(&mut self) {
self.downloading_headers.clear();
self.downloading_bodies.clear();
self.headers.clear();
self.bodies.clear();
for (_, ref mut p) in self.peers.iter_mut() {
p.asking_blocks.clear();
}
self.header_ids.clear();
self.syncing_difficulty = From::from(0u64);
self.state = SyncState::Idle;
}
/// Restart sync
pub fn restart(&mut self, io: &mut SyncIo) {
self.reset();
self.last_imported_block = 0;
self.starting_block = 0;
self.highest_block = 0;
self.have_common_block = false;
io.chain.clear_queue();
self.starting_block = io.chain.info().last_block_number;
self.state = SyncState::NotSynced;
}
/// Called by peer to report status
pub fn on_peer_status(&mut self, io: &mut SyncIo, peer_id: &PeerId, r: &Rlp) {
let peer = PeerInfo {
protocol_version: r.val_at(0),
network_id: r.val_at(1),
difficulty: r.val_at(2),
latest: r.val_at(3),
genesis: r.val_at(4),
asking: PeerAsking::Nothing,
asking_blocks: Vec::new(),
};
let old = self.peers.insert(peer_id.clone(), peer);
if old.is_some() {
panic!("ChainSync: new peer already exists");
}
self.sync_peer(io, peer_id, false);
}
/// Called by peer once it has new block headers during sync
pub fn on_peer_block_headers(&mut self, io: &mut SyncIo, peer_id: &PeerId, r: &Rlp) {
let item_count = r.item_count();
trace!(target: "sync", "BlockHeaders ({} entries)", item_count);
self.clear_peer_download(peer_id);
if self.state != SyncState::Blocks && self.state != SyncState::NewBlocks && self.state != SyncState::Waiting {
trace!(target: "sync", "Ignored unexpected block headers");
return;
}
if self.state == SyncState::Waiting {
trace!(target: "sync", "Ignored block headers while waiting");
return;
}
}
/// Called by peer once it has new block bodies
pub fn on_peer_block_bodies(&mut self, io: &mut SyncIo, peer: &PeerId, r: &Rlp) {
}
/// Called by peer once it has new block bodies
pub fn on_peer_new_block(&mut self, io: &mut SyncIo, peer: &PeerId, r: &Rlp) {
}
pub fn on_peer_new_hashes(&mut self, io: &mut SyncIo, peer: &PeerId, r: &Rlp) {
}
/// Called by peer when it is disconnecting
pub fn on_peer_aborting(&mut self, peer: &PeerId) {
}
/// Resume downloading after witing state
fn continue_sync(&mut self) {
}
/// Called after all blocks have been donloaded
fn complete_sync(&mut self) {
}
/// Enter waiting state
fn pause_sync(&mut self) {
}
fn reset_sync(&mut self) {
}
fn sync_peer(&mut self, io: &mut SyncIo, peer_id: &PeerId, force: bool) {
let (peer_latest, peer_difficulty) = {
let peer = self.peers.get_mut(&peer_id).expect("ChainSync: unknown peer");
if peer.asking != PeerAsking::Nothing
{
debug!(target: "sync", "Can't sync with this peer - outstanding asks.");
return;
}
if self.state == SyncState::Waiting
{
debug!(target: "sync", "Waiting for block queue");
return;
}
(peer.latest.clone(), peer.difficulty.clone())
};
let td = io.chain.info().pending_total_difficulty;
let syncing_difficulty = max(self.syncing_difficulty, td);
if force || peer_difficulty > syncing_difficulty {
// start sync
self.syncing_difficulty = peer_difficulty;
if self.state == SyncState::Idle || self.state == SyncState::NotSynced {
self.state = SyncState::Blocks;
}
self.request_headers_by_hash(io, peer_id, &peer_latest, 1, 0, false);
}
else if self.state == SyncState::Blocks {
self.request_blocks(io, peer_id);
}
}
fn request_blocks(&mut self, io: &mut SyncIo, peer_id: &PeerId) {
self.clear_peer_download(peer_id);
// check to see if we need to download any block bodies first
let mut needed_bodies: Vec<H256> = Vec::new();
let mut needed_numbers: Vec<BlockNumber> = Vec::new();
let mut index = 0usize;
if self.have_common_block && !self.headers.is_empty() && self.headers.last().unwrap().0 == self.last_imported_block + 1 {
let mut header = self.headers.len() - 1;
while header != 0 && needed_bodies.len() < 1024 && index < self.headers[header].1.len() {
let block = self.headers[header].0 + index as BlockNumber;
if !self.downloading_bodies.contains(&block) && !self.bodies.have_item(&block) {
needed_bodies.push(self.headers[header].1[index].hash.clone());
needed_numbers.push(block);
self.downloading_bodies.insert(block);
}
index += 1;
if index >= self.headers[header].1.len() {
index = 0;
header -= 1;
}
}
}
if !needed_bodies.is_empty() {
replace(&mut self.peers.get_mut(peer_id).unwrap().asking_blocks, needed_numbers);
self.request_bodies(io, peer_id, needed_bodies);
}
else {
// check if need to download headers
let mut start = 0usize;
if !self.have_common_block {
// download backwards until common block is found 1 header at a time
start = io.chain.info().last_block_number as usize;
if !self.headers.is_empty() {
start = min(start, self.headers.last().unwrap().0 as usize - 1);
}
if start <= 1 {
self.have_common_block = true; //reached genesis
}
}
if self.have_common_block {
start = self.last_imported_block as usize + 1;
let mut next = self.headers.len() - 1;
let mut count = 0usize;
if !self.headers.is_empty() && start >= self.headers.last().unwrap().0 as usize {
start = self.headers.last().unwrap().0 as usize + self.headers.last().unwrap().1.len();
next -=1;
}
while count == 0 && next != 0 {
count = min(1024, self.headers[next].0 as usize - start);
while count > 0 && self.downloading_headers.contains(&(start as BlockNumber)) {
start +=1;
count -=1;
}
}
let mut headers: Vec<BlockNumber> = Vec::new();
for block in start..(start + count) {
if !self.downloading_headers.contains(&(block as BlockNumber)) {
headers.push(block as BlockNumber);
self.downloading_headers.insert(block as BlockNumber);
}
}
count = self.headers.len();
if count > 0 {
replace(&mut self.peers.get_mut(peer_id).unwrap().asking_blocks, headers);
assert!(!self.headers.have_item(&(start as BlockNumber)));
self.request_headers_by_number(io, peer_id, start as BlockNumber, count, 0, false);
}
else if start >= (self.headers[next].0 as usize) {
start = self.headers[next].0 as usize + self.headers[next].1.len();
next -=1;
}
}
else {
self.request_headers_by_number(io, peer_id, start as BlockNumber, 1, 0, false);
}
}
}
fn clear_peer_download(&mut self, peer: &PeerId) {
}
fn clear_all_download(&mut self) {
}
fn collect_blocks(&mut self) {
}
fn request_headers_by_hash(&mut self, sync: &mut SyncIo, peer_id: &PeerId, h: &H256, count: usize, skip: usize, reverse: bool) {
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());
}
fn request_headers_by_number(&mut self, sync: &mut SyncIo, peer_id: &PeerId, n: BlockNumber, count: usize, skip: usize, reverse: bool) {
let mut rlp = RlpStream::new_list(4);
rlp.append(&n);
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());
}
fn request_bodies(&mut self, sync: &mut SyncIo, peer_id: &PeerId, hashes: Vec<H256>) {
let mut rlp = RlpStream::new_list(hashes.len());
for h in hashes {
rlp.append(&h);
}
self.send_request(sync, peer_id, PeerAsking::BlockHeaders, GET_BLOCK_BODIES_PACKET, rlp.out());
}
fn send_request(&mut self, sync: &mut SyncIo, peer_id: &PeerId, asking: PeerAsking, packet_id: PacketId, packet: Bytes) {
{
let mut peer = self.peers.get_mut(&peer_id).expect("ChainSync: unknown peer");
if peer.asking != PeerAsking::Nothing {
warn!(target:"sync", "Asking {:?} while requesting {:?}", asking, peer.asking);
}
}
match sync.network.send(*peer_id, packet_id, packet) {
Err(e) => {
warn!(target:"sync", "Error sending request: {:?}", e);
sync.disable_peer(peer_id);
self.on_peer_aborting(peer_id);
}
Ok(_) => {
let mut peer = self.peers.get_mut(&peer_id).unwrap();
peer.asking = asking;
}
}
}
}
pub trait ToUsize {
fn to_usize(&self) -> usize;
}
pub trait FromUsize {
fn from(s: usize) -> Self;
}
impl ToUsize for BlockNumber {
fn to_usize(&self) -> usize {
*self as usize
}
}
impl FromUsize for BlockNumber {
fn from(s: usize) -> BlockNumber {
s as BlockNumber
}
}
pub trait RangeCollection<K, V> {
fn have_item(&self, key: &K) -> bool;
fn find_item(&self, key: &K) -> Option<&V>;
fn remove_head(&mut self, start: &K);
fn remove_tail(&mut self, start: &K);
fn insert_item(&mut self, key: K, value: V);
}
impl<K, V> RangeCollection<K, V> for Vec<(K, Vec<V>)> where K: Ord + PartialEq + Add<Output = K> + Sub<Output = K> + Copy + FromUsize + ToUsize {
fn have_item(&self, key: &K) -> bool {
match self.binary_search_by(|&(k, _)| k.cmp(key).reverse()) {
Ok(_) => true,
Err(index) => match self.get(index + 1) {
Some(&(ref k, ref v)) => k <= key && (*k + FromUsize::from(v.len())) > *key,
_ => false
},
}
}
fn find_item(&self, key: &K) -> Option<&V> {
match self.binary_search_by(|&(k, _)| k.cmp(key).reverse()) {
Ok(index) => self.get(index).unwrap().1.get(0),
Err(index) => match self.get(index + 1) {
Some(&(ref k, ref v)) if k <= key && (*k + FromUsize::from(v.len())) > *key => v.get((*key - *k).to_usize()),
_ => None
},
}
}
/// Remove element key and following elements in the same range
fn remove_tail(&mut self, key: &K) {
match self.binary_search_by(|&(k, _)| k.cmp(key).reverse()) {
Ok(index) => { self.remove(index); },
Err(index) =>{
let mut empty = false;
match self.get_mut(index + 1) {
Some(&mut (ref k, ref mut v)) if k <= key && (*k + FromUsize::from(v.len())) > *key => {
v.truncate((*key - *k).to_usize());
empty = v.is_empty();
}
_ => {}
}
if empty {
self.remove(index + 1);
}
},
}
}
/// Remove range elements up to key
fn remove_head(&mut self, key: &K) {
if *key == FromUsize::from(0) {
return
}
let prev = *key - FromUsize::from(1);
match self.binary_search_by(|&(k, _)| k.cmp(&prev).reverse()) {
Ok(index) => { self.remove(index); },
Err(index) => {
let mut empty = false;
match self.get_mut(index + 1) {
Some(&mut (ref mut k, ref mut v)) if *k <= prev && (*k + FromUsize::from(v.len())) > *key => {
let head = v.split_off((*key - *k).to_usize());
empty = head.is_empty();
let removed = ::std::mem::replace(v, head);
let new_k = *k - FromUsize::from(removed.len());
::std::mem::replace(k, new_k);
}
_ => {}
}
if empty {
self.remove(index + 1);
}
},
}
}
fn insert_item(&mut self, key: K, value: V) {
assert!(!self.have_item(&key));
let mut lower = match self.binary_search_by(|&(k, _)| k.cmp(&key).reverse()) {
Ok(index) => index,
Err(index) => index,
};
lower += 1;
let mut to_remove: Option<usize> = None;
if lower < self.len() && self[lower].0 + FromUsize::from(self[lower].1.len()) == key {
// extend into existing chunk
self[lower].1.push(value);
}
else {
// insert a new chunk
let mut range: Vec<V> = vec![value];
self.insert(lower, (key, range));
};
let next = lower - 1;
if next < self.len()
{
{
let (mut next, mut inserted) = self.split_at_mut(lower);
let mut next = next.last_mut().unwrap();
let mut inserted = inserted.first_mut().unwrap();
if next.0 == key + FromUsize::from(1)
{
inserted.1.append(&mut next.1);
to_remove = Some(lower - 1);
}
}
if let Some(r) = to_remove {
self.remove(r);
}
}
}
}

35
src/sync/mod.rs Normal file
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@ -0,0 +1,35 @@
use std::sync::{Arc};
use eth::{BlockChainClient};
use util::network::{Error as NetworkError, ProtocolHandler, NetworkService, HandlerIo, TimerToken, PeerId};
mod chain;
pub fn new(service: &mut NetworkService, eth_cleint: Arc<BlockChainClient>) {
}
struct EthSync {
idle: bool,
chain: Arc<BlockChainClient+Send>
}
impl ProtocolHandler for EthSync {
fn initialize(&mut self, io: &mut HandlerIo) {
io.register_timer(1000);
}
fn read(&mut self, io: &mut HandlerIo, peer: &PeerId, packet_id: u8, data: &[u8]) {
}
fn connected(&mut self, io: &mut HandlerIo, peer: &PeerId) {
}
fn disconnected(&mut self, io: &mut HandlerIo, peer: &PeerId) {
}
fn timeout(&mut self, io: &mut HandlerIo, timer: TimerToken) {
}
}