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hydrabadger
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KORuL 2018-08-22 07:43:48 -07:00
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# Compiled files
*.o
*.so
*.rlib
*.dll
# Executables
*.exe
# Other
/*.png
# Generated by Cargo
Cargo.lock
**/Cargo.lock
/target/
**/target/
# My junk
/data
**/tmp
/src/junk
/bak
*.gz
massif*

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{
// Use IntelliSense to learn about possible attributes.
// Hover to view descriptions of existing attributes.
// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
"version": "0.2.0",
"configurations": [
{
"type": "node",
"request": "launch",
"name": "Launch Program",
"program": "${file}"
}
]
}

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[package]
name = "hydrabadger"
version = "0.1.0"
authors = ["c0gent <nsan1129@gmail.com>"]
autobins = false
# [[bin]]
# name = "simulation"
# path = "src/bin/simulation.rs"
#[[bin]]
#name = "peer_node"
#path = "src/bin/peer_node.rs"
#
[target.'cfg(target_os="android")'.dependencies]
jni = { version = "0.5", default-features = false }
#
[lib]
crate-type = ["dylib"]
#
[features]
# Used for debugging memory usage.
exit_upon_epoch_1000 = []
[dependencies]
log = "*"
# env_logger = "*"
env_logger = "0.5"
clap = "*"
failure = "*"
crossbeam = "~0.4.1"
crossbeam-channel = "*"
chrono = "*"
rust-crypto = "*"
num-traits = "*"
num-bigint = "*"
colored = "*"
itertools = "*"
pairing = "*"
rand = "0.4.2"
serde = "1"
serde_bytes = "*"
serde_derive = "1"
signifix = "*"
futures = "0.1"
tokio = "0.1.7"
tokio-codec = "*"
tokio-io = "*"
bincode = "0.8"
tokio-serde = "*"
tokio-serde-bincode = "*"
bytes = "*"
uuid = { version = "0.6", features = ["v4", "serde"] }
byteorder = "*"
parking_lot = "*"
clear_on_drop = "*"
[dependencies.hbbft]
version = "*"
# git = "https://github.com/c0gent/hbbft"
git = "https://github.com/poanetwork/hbbft"
# branch = "c0gent-supertraits"
# branch = "master"
branch = "add-mlock-error-handling"
# branch = "afck-agreement"
# path = "../hbbft"
# features = ["serialization-protobuf"]
[profile.release]
debug = true
debug-assertions = true

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IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES.
17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program 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.
This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<http://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.

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# Hydrabadger
An experimental peer-to-peer client using the [Honey Badger Byzantine Fault
Tolerant consensus algorithm](https://github.com/poanetwork/hbbft).
## Usage
### Compile
1. `git clone -b android git@github.com:poanetwork/hydrabadger.git`
2. `cd hydrabadger`
3. set needs environments
`export ANDROID_HOME=/Users/$USER/Library/Android/sdk`
`export NDK_HOME=$ANDROID_HOME/ndk-bundle`
and etc
4. make standalone NDK
`${NDK_HOME}/build/tools/make_standalone_toolchain.py --api 26 --arch arm64 --install-dir NDK/arm64`
`${NDK_HOME}/build/tools/make_standalone_toolchain.py --api 26 --arch arm --install-dir NDK/arm`
`${NDK_HOME}/build/tools/make_standalone_toolchain.py --api 26 --arch x86 --install-dir NDK/x86`
5. set environment to NDK compilers and linkers
`export PATH=$PATH:<project path>/NDK/arm64/bin/`
`export PATH=$PATH:<project path>/NDK/arm/bin/`
`export PATH=$PATH:<project path>/NDK/x86/bin/`
6. make cargo-config.toml
`[target.aarch64-linux-android]`
`ar = "<project path>/NDK/arm64/bin/aarch64-linux-android-ar"`
`linker = "<project path>/NDK/arm64/bin/aarch64-linux-android-clang"`
`[target.armv7-linux-androideabi]`
`ar = "<project path>/NDK/arm/bin/arm-linux-androideabi-ar"`
`linker = "<project path>/NDK/arm/bin/arm-linux-androideabi-clang"`
`[target.i686-linux-android]`
`ar = "<project path>/NDK/x86/bin/i686-linux-android-ar"`
`linker = "<project path>/NDK/x86/bin/i686-linux-android-clang"'`
7. need copy this config file to our .cargo directory like this:
`cp cargo-config.toml ~/.cargo/config`
8. `./compile`
### Current State
Network initialization node addition, transaction generation, consensus,
and batch outputs are all generally working. Batch outputs for each epoch are
printed to the log.
Overall the client is fragile and doesn't handle deviation from simple usage
very well yet.
### Unimplemented
* **Many edge cases and exceptions:** disconnects, reconnects, etc.
* Connecting to a network which is in the process of key generation causes
the entire network to fail. For now, wait until the network starts
outputting batches before connecting additional peer nodes.
* **Error handling** is atrocious, most errors are simply printed to the log.
* **Usage as a library** is still a work in progress as the API settles.
* **Much, much more...**
### License
[![License: LGPL v3.0](https://img.shields.io/badge/License-LGPL%20v3-blue.svg)](https://www.gnu.org/licenses/lgpl-3.0)
This project is licensed under the GNU Lesser General Public License v3.0. See the [LICENSE](LICENSE) file for details.

9
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#/bin/bash
# Starts compile library Hydrabadger for android arm64 arm x86
# =========================
cargo build --target aarch64-linux-android --release
cargo build --target armv7-linux-androideabi --release
cargo build --target i686-linux-android --release

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#/bin/bash
# Starts compile library Hydrabadger for android arm64 arm x86
# =========================
cargo build --target aarch64-linux-android
cargo build --target armv7-linux-androideabi
cargo build --target i686-linux-android

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//! An incredibly simple blockchain implementation.
//!
#![allow(unused_imports, dead_code, unused_variables)]
use chrono::prelude::*;
use crypto::digest::Digest;
use crypto::sha2::Sha256;
use num_bigint::BigUint;
use num_traits::One;
const HASH_BYTE_SIZE: usize = 32;
const DIFFICULTY: usize = 4;
const MAX_NONCE: u64 = 1_000_000;
pub type Sha256Hash = [u8; HASH_BYTE_SIZE];
/// Transforms a u64 into a little endian array of u8.
pub fn convert_u64_to_u8_array(val: u64) -> [u8; 8] {
return [
val as u8,
(val >> 8) as u8,
(val >> 16) as u8,
(val >> 24) as u8,
(val >> 32) as u8,
(val >> 40) as u8,
(val >> 48) as u8,
(val >> 56) as u8,
]
}
/// A mining error
#[derive(Debug, Fail)]
pub enum MiningError {
#[fail(display = "Could not mine block, hit iteration limit")]
Iteration,
#[fail(display = "Block has no parent")]
NoParent,
}
/// Calculates the hash for the provided block and nonce.
pub fn calculate_hash(block: &Block, nonce: u64) -> Sha256Hash {
let mut headers = block.headers();
headers.extend_from_slice(&convert_u64_to_u8_array(nonce));
let mut hasher = Sha256::new();
hasher.input(&headers);
let mut hash = Sha256Hash::default();
hasher.result(&mut hash);
hash
}
/// Attemts to find a satisfactory nonce.
fn try_hash(block: &Block) -> Option<(u64, Sha256Hash)> {
// The target is a number we compare the hash to. It is a 256bit
// binary with `DIFFICULTY` leading zeroes.
let target = BigUint::one() << (256 - 4 * DIFFICULTY);
for nonce in 0..MAX_NONCE {
let hash = calculate_hash(block, nonce);
let hash_int = BigUint::from_bytes_be(&hash);
if hash_int < target {
return Some((nonce, hash));
}
}
None
}
/// A block header.
#[derive(Debug)]
pub struct Header {
timestamp: i64,
prev_block_hash: Sha256Hash,
nonce: u64,
}
/// A block.
#[derive(Debug)]
pub struct Block {
header: Header,
// Body: Instead of transactions, blocks contain bytes:
data: Vec<u8>,
// Hash of the block:
hash: Option<Sha256Hash>,
}
impl Block {
// Creates a genesis block, which is a block with no parent.
//
// The `prev_block_hash` field is set to all zeroes.
pub fn genesis() -> Result<Self, MiningError> {
Self::new("Genesis block", Sha256Hash::default())
}
/// Creates a new block.
pub fn new(data: &str, prev_hash: Sha256Hash) -> Result<Self, MiningError> {
let mut b = Self {
header: Header {
timestamp: Utc::now().timestamp(),
prev_block_hash: prev_hash,
nonce: 0,
},
data: data.to_owned().into(),
hash: None,
};
try_hash(&b)
.ok_or(MiningError::Iteration)
.and_then(|(nonce, hash)| {
b.header.nonce = nonce;
b.hash = Some(hash);
Ok(b)
})
}
/// Returns the block headers.
pub fn headers(&self) -> Vec<u8> {
let mut vec = Vec::new();
vec.extend(&convert_u64_to_u8_array(self.header.timestamp as u64));
vec.extend_from_slice(&self.header.prev_block_hash);
vec
}
/// Returns this block's nonce.
pub fn nonce(&self) -> u64 {
self.header.nonce
}
/// Returns this block's hash.
pub fn hash(&self) -> Option<Sha256Hash> {
self.hash.clone()
}
/// Returns this block's hash.
pub fn prev_block_hash(&self) -> Sha256Hash {
self.header.prev_block_hash
}
pub fn data(&self) -> &[u8] {
&self.data
}
}
/// A sequence of blocks.
pub struct Blockchain {
blocks: Vec<Block>,
}
impl Blockchain {
// Initializes a new blockchain with a genesis block.
pub fn new() -> Result<Self, MiningError> {
let blocks = Block::genesis()?;
Ok(Self { blocks: vec![blocks] })
}
// Adds a newly-mined block to the chain.
pub fn add_block(&mut self, data: &str) -> Result<(), MiningError> {
let block: Block;
{
match self.blocks.last() {
Some(prev) => {
block = Block::new(data, prev.hash().unwrap())?;
}
// Adding a block to an empty blockchain is an error, a genesis block needs to be
// created first.
None => {
return Err(MiningError::NoParent)
}
}
}
self.blocks.push(block);
Ok(())
}
// A method that iterates over the blockchain's blocks and prints out information for each.
pub fn traverse(&self) {
for (i, block) in self.blocks.iter().enumerate() {
println!("block: {}", i);
println!("hash: {:?}", block.hash());
println!("parent: {:?}", block.prev_block_hash());
println!("data: {:?}", block.data());
println!()
}
}
}

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//! Hydrabadger event handler.
//!
//! FIXME: Reorganize `Handler` and `State` to more clearly separate concerns.
//! * Do not make state changes directly in this module (use closures, etc.).
//!
#![allow(unused_imports, dead_code, unused_variables, unused_mut, unused_assignments,
unreachable_code)]
use std::collections::BTreeMap;
use crossbeam::queue::SegQueue;
use tokio::{
self,
prelude::*,
};
use hbbft::{
crypto::{PublicKey, PublicKeySet},
sync_key_gen::{Part, PartOutcome, Ack, SyncKeyGen},
messaging::{DistAlgorithm, Target, },
dynamic_honey_badger::{Message as DhbMessage, JoinPlan, Change, ChangeState},
queueing_honey_badger::{Input as QhbInput, Change as QhbChange},
};
use peer::Peers;
use ::{InternalMessage, InternalMessageKind, WireMessage, WireMessageKind,
OutAddr, InAddr, Uid, NetworkState, InternalRx, Step, Input, Message, NetworkNodeInfo};
use super::{Hydrabadger, Error, State, StateDsct, InputOrMessage};
use super::{WIRE_MESSAGE_RETRY_MAX};
/// Hydrabadger event (internal message) handler.
pub struct Handler {
hdb: Hydrabadger,
// TODO: Use a bounded tx/rx (find a sensible upper bound):
peer_internal_rx: InternalRx,
// Outgoing wire message queue:
wire_queue: SegQueue<(Uid, WireMessage, usize)>,
// Output from HoneyBadger:
step_queue: SegQueue<Step>,
}
impl Handler {
pub(super) fn new(hdb: Hydrabadger, peer_internal_rx: InternalRx) -> Handler {
Handler {
hdb,
peer_internal_rx,
wire_queue: SegQueue::new(),
step_queue: SegQueue::new(),
}
}
fn wire_to_all(&self, msg: WireMessage, peers: &Peers) {
for (_p_addr, peer) in peers.iter()
.filter(|(&p_addr, _)| p_addr != OutAddr(self.hdb.addr().0)) {
peer.tx().unbounded_send(msg.clone()).unwrap();
}
}
fn wire_to_validators(&self, msg: WireMessage, peers: &Peers) {
// for peer in peers.validators()
// .filter(|p| p.out_addr() != &OutAddr(self.hdb.addr().0)) {
// peer.tx().unbounded_send(msg.clone()).unwrap();
// }
// FIXME(DEBUG): TEMPORARILY WIRE TO ALL FOR NOW:
self.wire_to_all(msg, peers)
}
// `tar_uid` of `None` sends to all peers.
fn wire_to(&self, tar_uid: Uid, msg: WireMessage, retry_count: usize, peers: &Peers) {
match peers.get_by_uid(&tar_uid) {
Some(p) => p.tx().unbounded_send(msg).unwrap(),
None => {
info!("Node '{}' is not yet established. Queueing message for now (retry_count: {}).",
tar_uid, retry_count);
self.wire_queue.push((tar_uid, msg, retry_count + 1))
},
}
}
fn handle_new_established_peer(&self, src_uid: Uid, _src_addr: OutAddr, src_pk: PublicKey,
request_change_add: bool, state: &mut State, peers: &Peers) -> Result<(), Error> {
match state.discriminant() {
StateDsct::Disconnected | StateDsct::DeterminingNetworkState => {
// panic!("hydrabadger::Handler::handle_new_established_peer: \
// Received `WireMessageKind::WelcomeRequestChangeAdd` or \
// `InternalMessageKind::NewIncomingConnection` while \
// `StateDsct::Disconnected` or `DeterminingNetworkState`.");
state.update_peer_connection_added(&peers);
self.hdb.set_state_discriminant(state.discriminant());
},
StateDsct::AwaitingMorePeersForKeyGeneration => {
if peers.count_validators() >= self.hdb.config().keygen_peer_count {
info!("== BEGINNING KEY GENERATION ==");
let local_uid = *self.hdb.uid();
let local_in_addr = *self.hdb.addr();
let local_sk = self.hdb.secret_key().public_key();
let (part, ack) = state.set_generating_keys(&local_uid,
self.hdb.secret_key().clone(), peers, self.hdb.config())?;
self.hdb.set_state_discriminant(state.discriminant());
info!("KEY GENERATION: Sending initial parts and our own ack.");
self.wire_to_validators(
WireMessage::hello_from_validator(
local_uid, local_in_addr, local_sk, state.network_state(&peers)),
peers);
self.wire_to_validators(WireMessage::key_gen_part(part), peers);
// FIXME: QUEUE ACKS UNTIL PARTS ARE ALL RECEIVED:
self.wire_to_validators(WireMessage::key_gen_part_ack(ack), peers);
}
},
StateDsct::GeneratingKeys { .. } => {
// This *could* be called multiple times when initially
// establishing outgoing connections. Do nothing for now.
warn!("hydrabadger::Handler::handle_new_established_peer: Ignoring new established \
peer signal while `StateDsct::GeneratingKeys`.");
},
StateDsct::Observer | StateDsct::Validator => {
// If the new peer sends a request-change-add (to be a
// validator), input the change into HB and broadcast, etc.
if request_change_add {
let qhb = state.qhb_mut().unwrap();
info!("Change-Adding ('{}') to honey badger.", src_uid);
let step = qhb.input(QhbInput::Change(QhbChange::Add(src_uid, src_pk)))
.expect("Error adding new peer to HB");
self.step_queue.push(step);
}
},
}
Ok(())
}
fn handle_input(&self, input: Input, state: &mut State) -> Result<(), Error> {
// match &input {
// QhbInput::User(_contrib) => {},
// QhbInput::Change(ref qhb_change) => match qhb_change {
// QhbChange::Add(uid, pk) => {
// if uid == self.hdb.uid() {
// debug_assert!(*pk == self.hdb.secret_key().public_key());
// }
// }
// QhbChange::Remove(_uid) => {},
// },
// }
trace!("hydrabadger::Handler: About to input....");
if let Some(step_res) = state.input(input) {
let step = step_res.map_err(|err| {
error!("Honey Badger input error: {:?}", err);
Error::HbStepError
})?;
trace!("hydrabadger::Handler: Input step result added to queue....");
self.step_queue.push(step);
}
Ok(())
}
fn handle_message(&self, msg: Message, src_uid: &Uid, state: &mut State) -> Result <(), Error> {
trace!("hydrabadger::Handler: HB_MESSAGE: {:?}", msg);
// match &msg {
// // A message belonging to the `HoneyBadger` algorithm started in
// // the given epoch.
// DhbMessage::HoneyBadger(start_epoch, ref msg) => {},
// // A transaction to be committed, signed by a node.
// DhbMessage::KeyGen(epoch, _key_gen_msg, _sig) => {},
// // A vote to be committed, signed by a validator.
// DhbMessage::SignedVote(signed_vote) => {},
// }
trace!("hydrabadger::Handler: About to handle_message....");
if let Some(step_res) = state.handle_message(src_uid, msg) {
let step = step_res.map_err(|err| {
error!("Honey Badger handle_message error: {:?}", err);
Error::HbStepError
})?;
trace!("hydrabadger::Handler: Message step result added to queue....");
self.step_queue.push(step);
}
Ok(())
}
fn handle_ack(&self, uid: &Uid, ack: Ack, sync_key_gen: &mut SyncKeyGen<Uid>,
ack_count: &mut usize) {
info!("KEY GENERATION: Handling ack from '{}'...", uid);
let fault_log = sync_key_gen.handle_ack(uid, ack.clone());
if !fault_log.is_empty() {
error!("Errors handling ack: '{:?}':\n{:?}", ack, fault_log);
// panic!("Errors handling ack: '{:?}':\n{:?}", ack, fault_log);
}
*ack_count += 1;
}
fn handle_queued_acks(&self, ack_queue: &SegQueue<(Uid, Ack)>,
sync_key_gen: &mut SyncKeyGen<Uid>, part_count: usize, ack_count: &mut usize) {
if part_count == self.hdb.config().keygen_peer_count + 1 {
info!("KEY GENERATION: Handling queued acks...");
debug!(" Peers complete: {}", sync_key_gen.count_complete());
debug!(" Part count: {}", part_count);
debug!(" Ack count: {}", ack_count);
while let Some((uid, ack)) = ack_queue.try_pop() {
self.handle_ack(&uid, ack, sync_key_gen, ack_count);
}
}
}
fn handle_key_gen_part(&self, src_uid: &Uid, part: Part, state: &mut State) {
match state {
State::GeneratingKeys { ref mut sync_key_gen, ref ack_queue, ref mut part_count,
ref mut ack_count, .. } => {
// TODO: Move this match block into a function somewhere for re-use:
info!("KEY GENERATION: Handling part from '{}'...", src_uid);
let mut skg = sync_key_gen.as_mut().unwrap();
let ack = match skg.handle_part(src_uid, part) {
Some(PartOutcome::Valid(ack)) => ack,
Some(PartOutcome::Invalid(faults)) => panic!("Invalid part \
(FIXME: handle): {:?}", faults),
None => {
error!("`QueueingHoneyBadger::handle_part` returned `None`.");
// panic!("`QueueingHoneyBadger::handle_part` returned `None`.");
return;
}
};
*part_count += 1;
info!("KEY GENERATION: Queueing `Ack`.");
ack_queue.as_ref().unwrap().push((*src_uid, ack.clone()));
self.handle_queued_acks(ack_queue.as_ref().unwrap(), skg, *part_count, ack_count);
let peers = self.hdb.peers();
info!("KEY GENERATION: Part from '{}' acknowledged. Broadcasting ack...", src_uid);
self.wire_to_validators(WireMessage::key_gen_part_ack(ack), &peers);
debug!(" Peers complete: {}", skg.count_complete());
debug!(" Part count: {}", part_count);
debug!(" Ack count: {}", ack_count);
},
State::DeterminingNetworkState { network_state, .. } => {
match network_state.is_some() {
true => unimplemented!(),
false => unimplemented!(),
}
},
s @ _ => panic!("::handle_key_gen_part: State must be `GeneratingKeys`. \
State: \n{:?} \n\n[FIXME: Enqueue these parts!]\n\n", s.discriminant()),
}
}
fn handle_key_gen_ack(&self, src_uid: &Uid, ack: Ack, state: &mut State, peers: &Peers)
-> Result<(), Error> {
let mut keygen_is_complete = false;
match state {
State::GeneratingKeys { ref mut sync_key_gen, ref ack_queue, ref part_count,
ref mut ack_count, .. } => {
let mut skg = sync_key_gen.as_mut().unwrap();
info!("KEY GENERATION: Queueing `Ack`.");
ack_queue.as_ref().unwrap().push((*src_uid, ack.clone()));
self.handle_queued_acks(ack_queue.as_ref().unwrap(), skg, *part_count, ack_count);
let node_n = self.hdb.config().keygen_peer_count + 1;
if skg.count_complete() == node_n
&& *ack_count >= node_n * node_n {
info!("KEY GENERATION: All acks received and handled.");
debug!(" Peers complete: {}", skg.count_complete());
debug!(" Part count: {}", part_count);
debug!(" Ack count: {}", ack_count);
assert!(skg.is_ready());
keygen_is_complete = true;
}
},
State::Validator { .. } | State::Observer { .. } => {
error!("Additional unhandled `Ack` received from '{}': \n{:?}", src_uid, ack);
// panic!("Additional unhandled `Ack` received from '{}': \n{:?}", src_uid, ack);
}
_ => panic!("::handle_key_gen_ack: State must be `GeneratingKeys`."),
}
if keygen_is_complete {
self.instantiate_hb(None, state, peers)?;
}
Ok(())
}
// This may be called spuriously and only need be handled by
// 'unestablished' nodes.
fn handle_join_plan(&self, jp: JoinPlan<Uid>, state: &mut State, peers: &Peers)
-> Result<(), Error> {
debug!("Join plan: \n{:?}", jp);
match state.discriminant() {
StateDsct::Disconnected => unimplemented!("hydrabadger::Handler::handle_join_plan: `Disconnected`"),
StateDsct::DeterminingNetworkState => {
info!("Received join plan.");
self.instantiate_hb(Some(jp), state, peers)?;
},
StateDsct::AwaitingMorePeersForKeyGeneration | StateDsct::GeneratingKeys => {
panic!("hydrabadger::Handler::handle_join_plan: Received join plan while \
`{}`", state.discriminant());
},
StateDsct::Observer | StateDsct::Validator => {}, // Ignore
// sd @ _ => unimplemented!("hydrabadger::Handler::handle_join_plan: {:?}", sd),
}
Ok(())
}
// TODO: Create a type for `net_info`.
fn instantiate_hb(&self,
// net_info: Option<(Vec<NetworkNodeInfo>, PublicKeySet, BTreeMap<Uid, PublicKey>)>,
jp_opt: Option<JoinPlan<Uid>>,
state: &mut State, peers: &Peers) -> Result<(), Error> {
let mut iom_queue_opt = None;
match state.discriminant() {
StateDsct::Disconnected => { unimplemented!() },
StateDsct::DeterminingNetworkState | StateDsct::GeneratingKeys => {
info!("== INSTANTIATING HONEY BADGER ==");
match jp_opt {
// Some((nni, pk_set, pk_map)) => {
// iom_queue_opt = Some(state.set_observer(*self.hdb.uid(),
// self.hdb.secret_key().clone(), nni, pk_set, pk_map));
// },
Some(jp) => {
iom_queue_opt = Some(state.set_observer(*self.hdb.uid(),
self.hdb.secret_key().clone(), jp, self.hdb.config(), &self.step_queue)?);
},
None => {
iom_queue_opt = Some(state.set_validator(*self.hdb.uid(),
self.hdb.secret_key().clone(), peers, self.hdb.config(), &self.step_queue)?);
}
}
},
StateDsct::AwaitingMorePeersForKeyGeneration => { unimplemented!() },
StateDsct::Observer => {
// TODO: Add checks to ensure that `net_info` is consistent
// with HB's netinfo.
warn!("hydrabadger::Handler::instantiate_hb: Called when `State::Observer`");
},
StateDsct::Validator => {
// TODO: Add checks to ensure that `net_info` is consistent
// with HB's netinfo.
warn!("hydrabadger::Handler::instantiate_hb: Called when `State::Validator`")
},
}
self.hdb.set_state_discriminant(state.discriminant());
// Handle previously queued input and messages:
if let Some(iom_queue) = iom_queue_opt {
while let Some(iom) = iom_queue.try_pop() {
match iom {
InputOrMessage::Input(input) => {
self.handle_input(input, state)?;
},
InputOrMessage::Message(uid, msg) => {
self.handle_message(msg, &uid, state)?;
}
}
}
}
Ok(())
}
fn handle_net_state(&self, net_state: NetworkState, state: &mut State, peers: &Peers)
-> Result<(), Error> {
let peer_infos;
match net_state {
NetworkState::Unknown(p_infos) => {
peer_infos = p_infos;
state.update_peer_connection_added(peers);
self.hdb.set_state_discriminant(state.discriminant());
}
NetworkState::AwaitingMorePeersForKeyGeneration(p_infos) => {
peer_infos = p_infos;
state.set_awaiting_more_peers();
self.hdb.set_state_discriminant(state.discriminant());
},
NetworkState::GeneratingKeys(p_infos, public_keys) => {
peer_infos = p_infos;
// state.set_observer();
},
NetworkState::Active(net_info) => {
peer_infos = net_info.0.clone();
match state {
State::DeterminingNetworkState { ref mut network_state, .. } => {
*network_state = Some(NetworkState::Active(net_info));
},
| State::Disconnected { .. }
| State::AwaitingMorePeersForKeyGeneration { .. }
| State::GeneratingKeys { .. } => {
panic!("Handler::net_state: Received `NetworkState::Active` while `{}`.",
state.discriminant());
},
_ => {},
}
// self.instantiate_hb(Some(net_info), peers, state)?;
},
NetworkState::None => panic!("`NetworkState::None` received."),
}
// Connect to all newly discovered peers.
for peer_info in peer_infos.iter() {
// Only connect with peers which are not already
// connected (and are not us).
if peer_info.in_addr != *self.hdb.addr()
&& !peers.contains_in_addr(&peer_info.in_addr)
&& peers.get(&OutAddr(peer_info.in_addr.0)).is_none() {
let local_pk = self.hdb.secret_key().public_key();
tokio::spawn(self.hdb.clone().connect_outgoing(
peer_info.in_addr.0,
local_pk,
Some((peer_info.uid, peer_info.in_addr, peer_info.pk)),
false,
));
}
}
Ok(())
}
fn handle_peer_disconnect(&self, src_uid: Uid, state: &mut State, peers: &Peers)
-> Result<(), Error> {
// self.hdb.qhb.write().input(Input::Change(Change::Remove(self.uid)))
// .expect("Error adding new peer to HB");
// Input::Change(Change::Remove(NodeUid(0)))
// self.hdb.peer_internal_tx.unbounded_send(InternalMessage::input(
// uid, self.out_addr, Input::Change(Change::Remove(uid)))).unwrap();
state.update_peer_connection_dropped(peers);
self.hdb.set_state_discriminant(state.discriminant());
// TODO: Send a node removal (Change-Remove) vote?
match state {
State::Disconnected { .. } => {
panic!("Received `WireMessageKind::PeerDisconnect` while disconnected.");
},
State::DeterminingNetworkState { .. } => {
// unimplemented!();
},
State::AwaitingMorePeersForKeyGeneration { .. } => {
// info!("Removing peer ({}: '{}') from await list.",
// src_out_addr, src_uid.clone().unwrap());
// state.peer_connection_dropped(&*self.hdb.peers());
},
State::GeneratingKeys { .. } => {
// Do something here (possibly panic).
},
State::Observer { ref mut qhb } => {
// Do nothing instead?
let step = qhb.as_mut().unwrap().input(QhbInput::Change(QhbChange::Remove(src_uid)))?;
self.step_queue.push(step);
}
State::Validator { ref mut qhb } => {
let step = qhb.as_mut().unwrap().input(QhbInput::Change(QhbChange::Remove(src_uid)))?;
self.step_queue.push(step);
},
}
Ok(())
}
fn handle_internal_message(&self, i_msg: InternalMessage, state: &mut State)
-> Result<(), Error> {
let (src_uid, src_out_addr, w_msg) = i_msg.into_parts();
match w_msg {
// New incoming connection:
InternalMessageKind::NewIncomingConnection(_src_in_addr, src_pk, request_change_add) => {
let peers = self.hdb.peers();
// if let StateDsct::Disconnected = state.discriminant() {
// state.set_awaiting_more_peers();
// }
// match state.discriminant() {
// StateDsct::Disconnected | StateDsct::DeterminingNetworkState => {
// state.set_awaiting_more_peers();
// self.hdb.set_state_discriminant(state.discriminant());
// },
// _ => {},
// }
let net_state;
match state {
State::Disconnected { } => {
state.set_awaiting_more_peers();
self.hdb.set_state_discriminant(state.discriminant());
net_state = state.network_state(&peers);
},
// | State::GeneratingKeys { .. }
// | State::AwaitingMorePeersForKeyGeneration { .. } => {
// net_state = state.network_state(&peers);
// },
State::DeterminingNetworkState { ref network_state, .. } => {
match network_state {
Some(ns) => net_state = ns.clone(),
None => net_state = state.network_state(&peers)
}
},
_ => net_state = state.network_state(&peers),
}
// // Get the current `NetworkState`:
// let net_state = state.network_state(&peers);
// Send response to remote peer:
peers.get(&src_out_addr).unwrap().tx().unbounded_send(
WireMessage::welcome_received_change_add(
self.hdb.uid().clone(), self.hdb.secret_key().public_key(),
net_state)
).unwrap();
// Modify state accordingly:
self.handle_new_established_peer(src_uid.unwrap(), src_out_addr, src_pk,
request_change_add, state, &peers)?;
},
// New outgoing connection (initial):
InternalMessageKind::NewOutgoingConnection => {
// This message must be immediately followed by either a
// `WireMessage::HelloFromValidator` or
// `WireMessage::WelcomeReceivedChangeAdd`.
debug_assert!(src_uid.is_none());
let peers = self.hdb.peers();
state.update_peer_connection_added(&peers);
self.hdb.set_state_discriminant(state.discriminant());
},
InternalMessageKind::HbInput(input) => {
self.handle_input(input, state)?;
},
InternalMessageKind::HbMessage(msg) => {
self.handle_message(msg, src_uid.as_ref().unwrap(), state)?;
},
InternalMessageKind::PeerDisconnect => {
let dropped_src_uid = src_uid.clone().unwrap();
info!("Peer disconnected: ({}: '{}').", src_out_addr, dropped_src_uid);
let peers = self.hdb.peers();
self.handle_peer_disconnect(dropped_src_uid, state, &peers)?;
},
InternalMessageKind::Wire(w_msg) => match w_msg.into_kind() {
// This is sent on the wire to ensure that we have all of the
// relevant details for a peer (generally preceeding other
// messages which may arrive before `Welcome...`.
WireMessageKind::HelloFromValidator(src_uid_new, src_in_addr, src_pk, net_state) => {
debug!("Received hello from {}", src_uid_new);
let mut peers = self.hdb.peers_mut();
match peers.establish_validator(src_out_addr, (src_uid_new, src_in_addr, src_pk)) {
true => debug_assert!(src_uid_new == src_uid.clone().unwrap()),
false => debug_assert!(src_uid.is_none()),
}
// Modify state accordingly:
self.handle_net_state(net_state, state, &peers)?;
}
// New outgoing connection:
WireMessageKind::WelcomeReceivedChangeAdd(src_uid_new, src_pk, net_state) => {
debug!("Received NetworkState: \n{:?}", net_state);
assert!(src_uid_new == src_uid.clone().unwrap());
let mut peers = self.hdb.peers_mut();
// Set new (outgoing-connection) peer's public info:
peers.establish_validator(src_out_addr,
(src_uid_new, InAddr(src_out_addr.0), src_pk));
// Modify state accordingly:
self.handle_net_state(net_state, state, &peers)?;
// Modify state accordingly:
self.handle_new_established_peer(src_uid_new, src_out_addr, src_pk,
false, state, &peers)?;
},
// Key gen proposal:
WireMessageKind::KeyGenPart(part) => {
self.handle_key_gen_part(&src_uid.unwrap(), part, state);
},
// Key gen proposal acknowledgement:
//
// FIXME: Queue until all parts have been sent.
WireMessageKind::KeyGenAck(ack) => {
let peers = self.hdb.peers();
self.handle_key_gen_ack(&src_uid.unwrap(), ack, state, &peers)?;
},
// Output by validators when a batch with a `ChangeState`
// other than `None` is output. Idempotent.
WireMessageKind::JoinPlan(jp) => {
let peers = self.hdb.peers();
self.handle_join_plan(jp, state, &peers)?;
},
wm @ _ => warn!("hydrabadger::Handler::handle_internal_message: Unhandled wire message: \
\n{:?}", wm,),
},
}
Ok(())
}
}
impl Future for Handler {
type Item = ();
type Error = Error;
/// Polls the internal message receiver until all txs are dropped.
fn poll(&mut self) -> Poll<(), Error> {
// Ensure the loop can't hog the thread for too long:
const MESSAGES_PER_TICK: usize = 50;
trace!("hydrabadger::Handler::poll: Locking 'state' for writing...");
let mut state = self.hdb.state_mut();
trace!("hydrabadger::Handler::poll: 'state' locked for writing.");
// Handle incoming internal messages:
for i in 0..MESSAGES_PER_TICK {
match self.peer_internal_rx.poll() {
Ok(Async::Ready(Some(i_msg))) => {
self.handle_internal_message(i_msg, &mut state)?;
// Exceeded max messages per tick, schedule notification:
if i + 1 == MESSAGES_PER_TICK {
task::current().notify();
}
},
Ok(Async::Ready(None)) => {
// The sending ends have all dropped.
info!("Shutting down Handler...");
return Ok(Async::Ready(()));
},
Ok(Async::NotReady) => {},
Err(()) => return Err(Error::HydrabadgerHandlerPoll),
};
}
let peers = self.hdb.peers();
// Process outgoing wire queue:
while let Some((tar_uid, msg, retry_count)) = self.wire_queue.try_pop() {
if retry_count < WIRE_MESSAGE_RETRY_MAX {
info!("Sending queued message from retry queue (retry_count: {})", retry_count);
self.wire_to(tar_uid, msg, retry_count, &peers);
} else {
info!("Discarding queued message for '{}': {:?}", tar_uid, msg);
}
}
trace!("hydrabadger::Handler: Processing step queue....");
// Process all honey badger output batches:
while let Some(mut step) = self.step_queue.try_pop() {
if step.output.len() > 0 { info!("NEW STEP OUTPUT:"); }
for batch in step.output.drain(..) {
info!(" BATCH: \n{:?}", batch);
if cfg!(exit_upon_epoch_1000) && batch.epoch() >= 1000 {
return Ok(Async::Ready(()))
}
if let Some(jp) = batch.join_plan() {
// FIXME: Only sent to unconnected nodes:
debug!("Outputting join plan: {:?}", jp);
self.wire_to_all(WireMessage::join_plan(jp), &peers);
}
match batch.change() {
ChangeState::None => {},
ChangeState::InProgress(_change) => {},
ChangeState::Complete(change) => match change {
Change::Add(uid, pk) => {
if uid == self.hdb.uid() {
assert_eq!(*pk, self.hdb.secret_key().public_key());
assert!(state.qhb().unwrap().dyn_hb().netinfo().is_validator());
state.promote_to_validator()?;
self.hdb.set_state_discriminant(state.discriminant());
}
},
Change::Remove(uid) => {
},
},
}
let extra_delay = self.hdb.config().output_extra_delay_ms;
if extra_delay > 0 {
info!("Delaying batch processing thread for {}ms", extra_delay);
::std::thread::sleep(::std::time::Duration::from_millis(extra_delay));
}
// TODO: Something useful!
}
for hb_msg in step.messages.drain(..) {
trace!("hydrabadger::Handler: Forwarding message: {:?}", hb_msg);
match hb_msg.target {
Target::Node(p_uid) => {
self.wire_to(p_uid, WireMessage::message(*self.hdb.uid(), hb_msg.message), 0, &peers);
},
Target::All => {
self.wire_to_all(WireMessage::message(*self.hdb.uid(), hb_msg.message), &peers);
},
}
}
if !step.fault_log.is_empty() {
error!(" FAULT LOG: \n{:?}", step.fault_log);
}
}
// TODO: Iterate through `state.qhb().unwrap().dyn_hb().netinfo()` and
// `peers` to ensure that the lists match. Make adjustments where
// necessary.
trace!("hydrabadger::Handler: Step queue processing complete.");
drop(peers);
drop(state);
trace!("hydrabadger::Handler::poll: 'state' unlocked for writing.");
Ok(Async::NotReady)
}
}

416
src/hydrabadger/hydrabadger.rs Normal file
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@ -0,0 +1,416 @@
//! A hydrabadger consensus node.
//!
#![allow(unused_imports, dead_code, unused_variables, unused_mut, unused_assignments,
unreachable_code)]
use std::{
time::{Duration, Instant},
sync::{
atomic::{AtomicUsize, Ordering},
Arc,
},
collections::HashSet,
net::{SocketAddr, ToSocketAddrs},
};
use futures::{
sync::mpsc,
future::{self, Either},
};
use tokio::{
self,
net::{TcpListener, TcpStream},
timer::Interval,
prelude::*,
};
use rand::{self, Rand};
use parking_lot::{RwLock, Mutex, RwLockReadGuard, RwLockWriteGuard};
use hbbft::{
crypto::{PublicKey, SecretKey},
queueing_honey_badger::{Input as QhbInput},
};
use peer::{PeerHandler, Peers};
use ::{InternalMessage, WireMessage, WireMessageKind, WireMessages,
OutAddr, InAddr, Uid, InternalTx, Transaction};
use super::{Error, State, StateDsct, Handler};
// The HoneyBadger batch size.
const DEFAULT_BATCH_SIZE: usize = 200;
// The number of random transactions to generate per interval.
const DEFAULT_TXN_GEN_COUNT: usize = 5;
// The interval between randomly generated transactions.
const DEFAULT_TXN_GEN_INTERVAL: u64 = 5000;
// The number of bytes per randomly generated transaction.
const DEFAULT_TXN_GEN_BYTES: usize = 2;
// The minimum number of peers needed to spawn a HB instance.
const DEFAULT_KEYGEN_PEER_COUNT: usize = 2;
// Causes the primary hydrabadger thread to sleep after every batch. Used for
// debugging.
const DEFAULT_OUTPUT_EXTRA_DELAY_MS: u64 = 0;
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct Config {
pub batch_size: usize,
pub txn_gen_count: usize,
pub txn_gen_interval: u64,
// TODO: Make this a range:
pub txn_gen_bytes: usize,
pub keygen_peer_count: usize,
pub output_extra_delay_ms: u64,
}
impl Config {
pub fn with_defaults() -> Config {
Config {
batch_size: DEFAULT_BATCH_SIZE,
txn_gen_count: DEFAULT_TXN_GEN_COUNT,
txn_gen_interval: DEFAULT_TXN_GEN_INTERVAL,
txn_gen_bytes: DEFAULT_TXN_GEN_BYTES,
keygen_peer_count: DEFAULT_KEYGEN_PEER_COUNT,
output_extra_delay_ms: DEFAULT_OUTPUT_EXTRA_DELAY_MS,
}
}
}
impl Default for Config {
fn default() -> Config {
Config::with_defaults()
}
}
/// The `Arc` wrapped portion of `Hydrabadger`.
///
/// Shared all over the place.
struct Inner {
/// Node uid:
uid: Uid,
/// Incoming connection socket.
addr: InAddr,
/// This node's secret key.
secret_key: SecretKey,
peers: RwLock<Peers>,
/// The current state containing HB when connected.
state: RwLock<State>,
// TODO: Move this into a new state struct.
state_dsct: AtomicUsize,
// TODO: Use a bounded tx/rx (find a sensible upper bound):
peer_internal_tx: InternalTx,
config: Config,
}
/// A `HoneyBadger` network node.
#[derive(Clone)]
pub struct Hydrabadger {
inner: Arc<Inner>,
handler: Arc<Mutex<Option<Handler>>>,
}
impl Hydrabadger {
/// Returns a new Hydrabadger node.
pub fn new(addr: SocketAddr, cfg: Config) -> Self {
use std::env;
use env_logger;
use chrono::Local;
env_logger::Builder::new()
.format(|buf, record| {
write!(buf,
"{} [{}] - HYDRABADGER: {}\n",
Local::now().format("%Y-%m-%dT%H:%M:%S"),
record.level(),
record.args()
)
})
.parse(&env::var("HYDRABADGER_LOG").unwrap_or_default())
.try_init().ok();
let uid = Uid::new();
let secret_key = SecretKey::rand(&mut rand::thread_rng());
let (peer_internal_tx, peer_internal_rx) = mpsc::unbounded();
info!("");
info!("Local Hydrabadger Node: ");
info!(" UID: {}", uid);
info!(" Socket Address: {}", addr);
info!(" Public Key: {:?}", secret_key.public_key());
warn!("");
warn!("****** This is an alpha build. Do not use in production! ******");
warn!("");
println!("");
println!("Local Hydrabadger Node: ");
println!(" UID: {}", uid);
println!(" Socket Address: {}", addr);
println!(" Public Key: {:?}", secret_key.public_key());
let inner = Arc::new(Inner {
uid,
addr: InAddr(addr),
secret_key,
peers: RwLock::new(Peers::new()),
state: RwLock::new(State::disconnected()),
state_dsct: AtomicUsize::new(0),
peer_internal_tx,
config: cfg,
});
let hdb = Hydrabadger {
inner,
handler: Arc::new(Mutex::new(None)),
};
*hdb.handler.lock() = Some(Handler::new(hdb.clone(), peer_internal_rx));
hdb
}
/// Returns a new Hydrabadger node.
pub fn with_defaults(addr: SocketAddr) -> Self {
Hydrabadger::new(addr, Config::default())
}
/// Returns the pre-created handler.
pub fn handler(&self) -> Option<Handler> {
self.handler.lock().take()
}
/// Returns a reference to the inner state.
pub(crate) fn state(&self) -> RwLockReadGuard<State> {
let state = self.inner.state.read();
state
}
/// Returns a mutable reference to the inner state.
pub(crate) fn state_mut(&self) -> RwLockWriteGuard<State> {
let state = self.inner.state.write();
state
}
/// Returns a recent state discriminant.
///
/// The returned value may not be up to date and is to be considered
/// immediately stale.
pub fn state_info_stale(&self) -> (StateDsct, usize, usize) {
let sd = self.inner.state_dsct.load(Ordering::Relaxed).into();
(sd, 0, 0)
}
/// Sets the publicly visible state discriminant and returns the previous value.
pub(super) fn set_state_discriminant(&self, dsct: StateDsct) -> StateDsct {
let sd = StateDsct::from(self.inner.state_dsct.swap(dsct.into(), Ordering::Release));
info!("State has been set from '{}' to '{}'.", sd, dsct);
sd
}
/// Returns a reference to the peers list.
pub(crate) fn peers(&self) -> RwLockReadGuard<Peers> {
self.inner.peers.read()
}
/// Returns a mutable reference to the peers list.
pub(crate) fn peers_mut(&self) -> RwLockWriteGuard<Peers> {
self.inner.peers.write()
}
/// Returns a mutable reference to the peers list.
pub(crate) fn config(&self) -> &Config {
&self.inner.config
}
/// Sends a message on the internal tx.
pub(crate) fn send_internal(&self, msg: InternalMessage) {
if let Err(err) = self.inner.peer_internal_tx.unbounded_send(msg) {
error!("Unable to send on internal tx. Internal rx has dropped: {}", err);
::std::process::exit(-1)
}
}
/// Returns a future that handles incoming connections on `socket`.
fn handle_incoming(self, socket: TcpStream)
-> impl Future<Item = (), Error = ()> {
info!("Incoming connection from '{}'", socket.peer_addr().unwrap());
let wire_msgs = WireMessages::new(socket);
wire_msgs.into_future()
.map_err(|(e, _)| e)
.and_then(move |(msg_opt, w_messages)| {
// let _hdb = self.clone();
match msg_opt {
Some(msg) => match msg.into_kind() {
// The only correct entry point:
WireMessageKind::HelloRequestChangeAdd(peer_uid, peer_in_addr, peer_pk) => {
// Also adds a `Peer` to `self.peers`.
let peer_h = PeerHandler::new(Some((peer_uid, peer_in_addr, peer_pk)),
self.clone(), w_messages);
// Relay incoming `HelloRequestChangeAdd` message internally.
peer_h.hdb().send_internal(
InternalMessage::new_incoming_connection(peer_uid,
*peer_h.out_addr(), peer_in_addr, peer_pk, true)
);
Either::B(peer_h)
},
_ => {
// TODO: Return this as a future-error (handled below):
error!("Peer connected without sending \
`WireMessageKind::HelloRequestChangeAdd`.");
Either::A(future::ok(()))
},
},
None => {
// The remote client closed the connection without sending
// a welcome_request_change_add message.
Either::A(future::ok(()))
},
}
})
.map_err(|err| error!("Connection error = {:?}", err))
}
/// Returns a future that connects to new peer.
pub(super) fn connect_outgoing(self, remote_addr: SocketAddr, local_pk: PublicKey,
pub_info: Option<(Uid, InAddr, PublicKey)>, is_optimistic: bool)
-> impl Future<Item = (), Error = ()> {
let uid = self.inner.uid.clone();
let in_addr = self.inner.addr;
info!("Initiating outgoing connection to: {}", remote_addr);
TcpStream::connect(&remote_addr)
.map_err(Error::from)
.and_then(move |socket| {
// Wrap the socket with the frame delimiter and codec:
let mut wire_msgs = WireMessages::new(socket);
let wire_hello_result = wire_msgs.send_msg(
WireMessage::hello_request_change_add(uid, in_addr, local_pk));
match wire_hello_result {
Ok(_) => {
let peer = PeerHandler::new(pub_info, self.clone(), wire_msgs);
self.send_internal(InternalMessage::new_outgoing_connection(*peer.out_addr()));
Either::A(peer)
},
Err(err) => Either::B(future::err(err)),
}
})
.map_err(move |err| {
if is_optimistic {
warn!("Unable to connect to: {}", remote_addr);
} else {
error!("Error connecting to: {} \n{:?}", remote_addr, err);
}
})
}
/// Returns a future that generates random transactions and logs status
/// messages.
fn generate_txns_status(self) -> impl Future<Item = (), Error = ()> {
Interval::new(Instant::now(), Duration::from_millis(self.inner.config.txn_gen_interval))
.for_each(move |_| {
let hdb = self.clone();
let peers = hdb.peers();
// Log state:
let (dsct, p_ttl, p_est) = hdb.state_info_stale();
let peer_count = peers.count_total();
info!("State: {:?}({})", dsct, peer_count);
// Log peer list:
let peer_list = peers.peers().map(|p| {
p.in_addr().map(|ia| ia.0.to_string())
.unwrap_or(format!("No in address"))
}).collect::<Vec<_>>();
info!(" Peers: {:?}", peer_list);
// Log (trace) full peerhandler details:
trace!("PeerHandler list:");
for (peer_addr, _peer) in peers.iter() {
trace!(" peer_addr: {}", peer_addr); }
drop(peers);
match dsct {
StateDsct::Validator => {
info!("Generating and inputting {} random transactions...", self.inner.config.txn_gen_count);
// Send some random transactions to our internal HB instance.
let txns: Vec<_> = (0..self.inner.config.txn_gen_count).map(|_| {
Transaction::random(self.inner.config.txn_gen_bytes)
}).collect();
hdb.send_internal(
InternalMessage::hb_input(hdb.inner.uid, OutAddr(*hdb.inner.addr), QhbInput::User(txns))
);
},
_ => {},
}
Ok(())
})
.map_err(|err| error!("List connection inverval error: {:?}", err))
}
/// Binds to a host address and returns a future which starts the node.
pub fn node(self, remotes: Option<HashSet<SocketAddr>>, reactor_remote: Option<()>)
-> impl Future<Item = (), Error = ()> {
let socket = TcpListener::bind(&self.inner.addr).unwrap();
info!("Listening on: {}", self.inner.addr);
let remotes = remotes.unwrap_or(HashSet::new());
let hdb = self.clone();
let listen = socket.incoming()
.map_err(|err| error!("Error accepting socket: {:?}", err))
.for_each(move |socket| {
tokio::spawn(hdb.clone().handle_incoming(socket));
Ok(())
});
let hdb = self.clone();
let local_pk = hdb.inner.secret_key.public_key();
let connect = future::lazy(move || {
for &remote_addr in remotes.iter() {
tokio::spawn(hdb.clone().connect_outgoing(remote_addr, local_pk, None, true));
}
Ok(())
});
let generate_txns_status = self.clone().generate_txns_status();
let hdb_handler = self.handler()
.map_err(|err| error!("Handler internal error: {:?}", err));
listen.join4(connect, generate_txns_status, hdb_handler).map(|(_, _, _, _)| ())
}
/// Starts a node.
pub fn run_node(self, remotes: Option<HashSet<SocketAddr>>) {
tokio::run(self.node(remotes, None));
}
pub fn addr(&self) -> &InAddr {
&self.inner.addr
}
pub fn uid(&self) -> &Uid {
&self.inner.uid
}
pub(super) fn secret_key(&self) -> &SecretKey {
&self.inner.secret_key
}
}

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mod state;
mod handler;
mod hydrabadger;
use std;
use bincode;
use hbbft::{
dynamic_honey_badger::{Error as DhbError},
queueing_honey_badger::{Error as QhbError},
sync_key_gen::{Error as SyncKeyGenError},
};
use ::{Message, Input, Uid};
use self::state::{State, StateDsct};
use self::handler::{Handler};
pub use self::hydrabadger::{Hydrabadger, Config};
// Number of times to attempt wire message re-send.
pub const WIRE_MESSAGE_RETRY_MAX: usize = 10;
/// A HoneyBadger input or message.
#[derive(Clone, Debug)]
pub(crate) enum InputOrMessage {
Input(Input),
Message(Uid, Message),
}
#[derive(Debug, Fail)]
pub enum Error {
#[fail(display = "Io error: {}", _0)]
Io(std::io::Error),
#[fail(display = "Serde error: {}", _0)]
Serde(bincode::Error),
#[fail(display = "Error polling hydrabadger internal receiver")]
HydrabadgerHandlerPoll,
// FIXME: Make honeybadger error thread safe.
#[fail(display = "QueuingHoneyBadger propose error")]
QhbPart,
/// TEMPORARY UNTIL WE FIX HB ERROR TYPES:
#[fail(display = "DynamicHoneyBadger error")]
Dhb(()),
/// TEMPORARY UNTIL WE FIX HB ERROR TYPES:
#[fail(display = "QueuingHoneyBadger error [FIXME]")]
Qhb(()),
/// TEMPORARY UNTIL WE FIX HB ERROR TYPES:
#[fail(display = "QueuingHoneyBadger step error")]
HbStepError,
#[fail(display = "Error creating SyncKeyGen: {}", _0)]
SyncKeyGenNew(SyncKeyGenError),
#[fail(display = "Error generating keys: {}", _0)]
SyncKeyGenGenerate(SyncKeyGenError),
}
impl From<std::io::Error> for Error {
fn from(err: std::io::Error) -> Error {
Error::Io(err)
}
}
impl From<QhbError> for Error {
fn from(_err: QhbError) -> Error {
Error::Qhb(())
}
}
impl From<DhbError> for Error {
fn from(_err: DhbError) -> Error {
Error::Dhb(())
}
}

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//! Hydrabadger state.
//!
//! FIXME: Reorganize `Handler` and `State` to more clearly separate concerns.
//!
#![allow(dead_code)]
use std::{
fmt,
collections::BTreeMap,
};
use crossbeam::queue::SegQueue;
use hbbft::{
crypto::{PublicKey, SecretKey},
sync_key_gen::{SyncKeyGen, Part, PartOutcome, Ack},
messaging::{DistAlgorithm, NetworkInfo},
queueing_honey_badger::{Error as QhbError, QueueingHoneyBadger},
dynamic_honey_badger::{DynamicHoneyBadger, JoinPlan},
};
use peer::Peers;
use ::{Uid, NetworkState, NetworkNodeInfo, Message, Transaction, Step, Input};
use super::{InputOrMessage, Error, Config};
// use super::{BATCH_SIZE, config.keygen_peer_count};
/// A `State` discriminant.
#[derive(Copy, Clone, Debug)]
pub enum StateDsct {
Disconnected,
DeterminingNetworkState,
AwaitingMorePeersForKeyGeneration,
GeneratingKeys,
Observer,
Validator,
}
impl fmt::Display for StateDsct {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{:?}", self)
}
}
impl From<StateDsct> for usize {
fn from(dsct: StateDsct) -> usize {
match dsct {
StateDsct::Disconnected => 0,
StateDsct::DeterminingNetworkState => 1,
StateDsct::AwaitingMorePeersForKeyGeneration => 2,
StateDsct::GeneratingKeys => 3,
StateDsct::Observer => 4,
StateDsct::Validator => 5,
}
}
}
impl From<usize> for StateDsct {
fn from(val: usize) -> StateDsct {
match val {
0 => StateDsct::Disconnected,
1 => StateDsct::DeterminingNetworkState,
2 => StateDsct::AwaitingMorePeersForKeyGeneration,
3 => StateDsct::GeneratingKeys,
4 => StateDsct::Observer,
5 => StateDsct::Validator,
_ => panic!("Invalid state discriminant."),
}
}
}
/// The current hydrabadger state.
//
// TODO: Make this into a struct and move the `state_dsct: AtomicUsize` field
// into it.
//
pub(crate) enum State {
Disconnected { },
DeterminingNetworkState {
ack_queue: Option<SegQueue<(Uid, Ack)>>,
iom_queue: Option<SegQueue<InputOrMessage>>,
network_state: Option<NetworkState>,
},
AwaitingMorePeersForKeyGeneration {
// Queued input to HoneyBadger:
// FIXME: ACTUALLY USE THIS QUEUED INPUT!
ack_queue: Option<SegQueue<(Uid, Ack)>>,
iom_queue: Option<SegQueue<InputOrMessage>>,
},
GeneratingKeys {
sync_key_gen: Option<SyncKeyGen<Uid>>,
public_key: Option<PublicKey>,
public_keys: BTreeMap<Uid, PublicKey>,
ack_queue: Option<SegQueue<(Uid, Ack)>>,
part_count: usize,
ack_count: usize,
// Queued input to HoneyBadger:
iom_queue: Option<SegQueue<InputOrMessage>>,
},
Observer {
qhb: Option<QueueingHoneyBadger<Vec<Transaction>, Uid>>,
},
Validator {
qhb: Option<QueueingHoneyBadger<Vec<Transaction>, Uid>>,
},
}
impl State {
/// Returns the state discriminant.
pub(super) fn discriminant(&self) -> StateDsct {
match self {
State::Disconnected { .. } => StateDsct::Disconnected,
State::DeterminingNetworkState { .. } => StateDsct::DeterminingNetworkState,
State::AwaitingMorePeersForKeyGeneration { .. } =>
StateDsct::AwaitingMorePeersForKeyGeneration,
State::GeneratingKeys{ .. } => StateDsct::GeneratingKeys,
State::Observer { .. } => StateDsct::Observer,
State::Validator { .. } => StateDsct::Validator,
}
}
/// Returns a new `State::Disconnected`.
pub(super) fn disconnected(/*local_uid: Uid, local_addr: InAddr,*/ /*secret_key: SecretKey*/)
-> State {
State::Disconnected { /*secret_key: secret_key*/ }
}
// /// Sets the state to `DeterminingNetworkState`.
// //
// // TODO: Add proper error handling:
// fn set_determining_network_state(&mut self) {
// *self = match self {
// State::Disconnected { } => {
// info!("Setting state: `DeterminingNetworkState`.");
// State::DeterminingNetworkState { }
// },
// _ => panic!("Must be disconnected before calling `::peer_connection_added`."),
// };
// }
/// Sets the state to `AwaitingMorePeersForKeyGeneration`.
pub(super) fn set_awaiting_more_peers(&mut self) {
*self = match self {
State::Disconnected { } => {
info!("Setting state: `AwaitingMorePeersForKeyGeneration`.");
State::AwaitingMorePeersForKeyGeneration {
ack_queue: Some(SegQueue::new()),
iom_queue: Some(SegQueue::new()),
}
},
State::DeterminingNetworkState { ref mut iom_queue, ref mut ack_queue,
ref network_state } => {
assert!(!network_state.is_some(),
"State::set_awaiting_more_peers: Network is active!");
info!("Setting state: `AwaitingMorePeersForKeyGeneration`.");
State::AwaitingMorePeersForKeyGeneration {
ack_queue: ack_queue.take(),
iom_queue: iom_queue.take(),
}
},
s @ _ => {
debug!("State::set_awaiting_more_peers: Attempted to set \
`State::AwaitingMorePeersForKeyGeneration` while {}.", s.discriminant());
return
}
};
}
/// Sets the state to `AwaitingMorePeersForKeyGeneration`.
pub(super) fn set_generating_keys(&mut self, local_uid: &Uid, local_sk: SecretKey, peers: &Peers,
config: &Config) -> Result<(Part, Ack), Error> {
let (part, ack);
*self = match self {
State::AwaitingMorePeersForKeyGeneration { ref mut iom_queue, ref mut ack_queue } => {
// let secret_key = secret_key.clone();
let threshold = config.keygen_peer_count / 3;
let mut public_keys: BTreeMap<Uid, PublicKey> = peers.validators().map(|p| {
p.pub_info().map(|(uid, _, pk)| (*uid, *pk)).unwrap()
}).collect();
let pk = local_sk.public_key();
public_keys.insert(*local_uid, pk);
let (mut sync_key_gen, opt_part) = SyncKeyGen::new(*local_uid, local_sk,
public_keys.clone(), threshold).map_err(Error::SyncKeyGenNew)?;
part = opt_part.expect("This node is not a validator (somehow)!");
info!("KEY GENERATION: Handling our own `Part`...");
ack = match sync_key_gen.handle_part(&local_uid, part.clone()) {
Some(PartOutcome::Valid(ack)) => ack,
Some(PartOutcome::Invalid(faults)) => panic!("Invalid part \
(FIXME: handle): {:?}", faults),
None => unimplemented!(),
};
// info!("KEY GENERATION: Handling our own `Ack`...");
// let fault_log = sync_key_gen.handle_ack(local_uid, ack.clone());
// if !fault_log.is_empty() {
// error!("Errors acknowledging part (from self):\n {:?}", fault_log);
// }
info!("KEY GENERATION: Queueing our own `Ack`...");
ack_queue.as_ref().unwrap().push((*local_uid, ack.clone()));
State::GeneratingKeys {
sync_key_gen: Some(sync_key_gen),
public_key: Some(pk),
public_keys,
ack_queue: ack_queue.take(),
part_count: 1,
ack_count: 0,
iom_queue: iom_queue.take(),
}
},
_ => panic!("State::set_generating_keys: \
Must be State::AwaitingMorePeersForKeyGeneration"),
};
Ok((part, ack))
}
/// Changes the variant (in-place) of this `State` to `Observer`.
//
// TODO: Add proper error handling:
#[must_use]
pub(super) fn set_observer(&mut self, local_uid: Uid, local_sk: SecretKey,
jp: JoinPlan<Uid>, cfg: &Config, step_queue: &SegQueue<Step>)
-> Result<SegQueue<InputOrMessage>, Error> {
let iom_queue_ret;
*self = match self {
State::DeterminingNetworkState { ref mut iom_queue, .. } => {
let (dhb, dhb_step) = DynamicHoneyBadger::builder()
.build_joining(local_uid, local_sk, jp)?;
step_queue.push(dhb_step.convert());
let (qhb, qhb_step) = QueueingHoneyBadger::builder(dhb)
.batch_size(cfg.batch_size)
.build();
step_queue.push(qhb_step);
iom_queue_ret = iom_queue.take().unwrap();
info!("");
info!("== HONEY BADGER INITIALIZED ==");
info!("");
{ // TODO: Consolidate or remove:
let pk_set = qhb.dyn_hb().netinfo().public_key_set();
let pk_map = qhb.dyn_hb().netinfo().public_key_map();
info!("");
info!("");
info!("PUBLIC KEY: {:?}", pk_set.public_key());
info!("PUBLIC KEY SET: \n{:?}", pk_set);
info!("PUBLIC KEY MAP: \n{:?}", pk_map);
info!("");
info!("");
}
State::Observer { qhb: Some(qhb) }
},
s @ _ => panic!("State::set_observer: State must be `GeneratingKeys`. \
State: {}", s.discriminant()),
};
Ok(iom_queue_ret)
}
/// Changes the variant (in-place) of this `State` to `Observer`.
//
// TODO: Add proper error handling:
#[must_use]
pub(super) fn set_validator(&mut self, local_uid: Uid, local_sk: SecretKey, peers: &Peers,
cfg: &Config, step_queue: &SegQueue<Step>)
-> Result<SegQueue<InputOrMessage>, Error> {
let iom_queue_ret;
*self = match self {
State::GeneratingKeys { ref mut sync_key_gen, mut public_key,
ref mut iom_queue, .. } => {
let mut sync_key_gen = sync_key_gen.take().unwrap();
assert_eq!(public_key.take().unwrap(), local_sk.public_key());
let (pk_set, sk_share_opt) = sync_key_gen.generate()
.map_err(Error::SyncKeyGenGenerate)?;
let sk_share = sk_share_opt.unwrap();
assert!(peers.count_validators() >= cfg.keygen_peer_count);
let mut node_ids: BTreeMap<Uid, PublicKey> = peers.validators().map(|p| {
(p.uid().cloned().unwrap(), p.public_key().cloned().unwrap())
}).collect();
node_ids.insert(local_uid, local_sk.public_key());
let netinfo = NetworkInfo::new(
local_uid,
sk_share,
pk_set,
local_sk,
node_ids,
);
let dhb = DynamicHoneyBadger::builder()
.build(netinfo);
let (qhb, qhb_step) = QueueingHoneyBadger::builder(dhb)
.batch_size(cfg.batch_size)
.build();
step_queue.push(qhb_step);
info!("");
info!("== HONEY BADGER INITIALIZED ==");
info!("");
{ // TODO: Consolidate or remove:
let pk_set = qhb.dyn_hb().netinfo().public_key_set();
let pk_map = qhb.dyn_hb().netinfo().public_key_map();
info!("");
info!("");
info!("PUBLIC KEY: {:?}", pk_set.public_key());
info!("PUBLIC KEY SET: \n{:?}", pk_set);
info!("PUBLIC KEY MAP: \n{:?}", pk_map);
info!("");
info!("");
}
iom_queue_ret = iom_queue.take().unwrap();
State::Validator { qhb: Some(qhb) }
},
s @ _ => panic!("State::set_validator: State must be `GeneratingKeys`. State: {}",
s.discriminant()),
};
Ok(iom_queue_ret)
}
#[must_use]
pub(super) fn promote_to_validator(&mut self) -> Result<(), Error> {
*self = match self {
State::Observer { ref mut qhb } => {
info!("=== PROMOTING NODE TO VALIDATOR ===");
State::Validator { qhb: qhb.take() }
},
s @ _ => panic!("State::promote_to_validator: State must be `Observer`. State: {}",
s.discriminant()),
};
Ok(())
}
/// Sets state to `DeterminingNetworkState` if `Disconnected`, otherwise does
/// nothing.
pub(super) fn update_peer_connection_added(&mut self, _peers: &Peers) {
let _dsct = self.discriminant();
*self = match self {
State::Disconnected { } => {
info!("Setting state: `DeterminingNetworkState`.");
State::DeterminingNetworkState {
ack_queue: Some(SegQueue::new()),
iom_queue: Some(SegQueue::new()),
network_state: None,
}
},
_ => return,
};
}
/// Sets state to `Disconnected` if peer count is zero, otherwise does nothing.
pub(super) fn update_peer_connection_dropped(&mut self, peers: &Peers) {
*self = match self {
State::DeterminingNetworkState { .. } => {
if peers.count_total() == 0 {
State::Disconnected { }
} else {
return;
}
},
State::Disconnected { .. } => {
error!("Received peer disconnection when `State::Disconnected`.");
assert_eq!(peers.count_total(), 0);
return;
},
State::AwaitingMorePeersForKeyGeneration { .. } => {
debug!("Ignoring peer disconnection when \
`State::AwaitingMorePeersForKeyGeneration`.");
return;
},
State::GeneratingKeys { .. } => {
panic!("FIXME: RESTART KEY GENERATION PROCESS AFTER PEER DISCONNECTS.");
}
State::Observer { qhb: _, .. } => {
debug!("Ignoring peer disconnection when `State::Observer`.");
return;
},
State::Validator { qhb: _, .. } => {
debug!("Ignoring peer disconnection when `State::Validator`.");
return;
},
}
}
/// Returns the network state, if possible.
pub(super) fn network_state(&self, peers: &Peers) -> NetworkState {
let peer_infos = peers.peers().filter_map(|peer| {
peer.pub_info().map(|(&uid, &in_addr, &pk)| {
NetworkNodeInfo { uid, in_addr, pk }
})
}).collect::<Vec<_>>();
match self {
State::AwaitingMorePeersForKeyGeneration { .. } => {
NetworkState::AwaitingMorePeersForKeyGeneration(peer_infos)
},
State::GeneratingKeys{ ref public_keys, .. } => {
NetworkState::GeneratingKeys(peer_infos, public_keys.clone())
},
State::Observer { ref qhb } | State::Validator { ref qhb } => {
// FIXME: Ensure that `peer_info` matches `NetworkInfo` from HB.
let pk_set = qhb.as_ref().unwrap().dyn_hb().netinfo().public_key_set().clone();
let pk_map = qhb.as_ref().unwrap().dyn_hb().netinfo().public_key_map().clone();
NetworkState::Active((peer_infos, pk_set, pk_map))
},
_ => NetworkState::Unknown(peer_infos),
}
}
/// Returns a reference to the internal HB instance.
pub(super) fn qhb(&self) -> Option<&QueueingHoneyBadger<Vec<Transaction>, Uid>> {
match self {
State::Observer { ref qhb, .. } => qhb.as_ref(),
State::Validator { ref qhb, .. } => qhb.as_ref(),
_ => None,
}
}
/// Returns a reference to the internal HB instance.
pub(super) fn qhb_mut(&mut self) -> Option<&mut QueueingHoneyBadger<Vec<Transaction>, Uid>> {
match self {
State::Observer { ref mut qhb, .. } => qhb.as_mut(),
State::Validator { ref mut qhb, .. } => qhb.as_mut(),
_ => None,
}
}
/// Presents input to HoneyBadger or queues it for later.
///
/// Cannot be called while disconnected or connection-pending.
pub(super) fn input(&mut self, input: Input) -> Option<Result<Step, QhbError>> {
match self {
State::Observer { ref mut qhb, .. } | State::Validator { ref mut qhb, .. } => {
trace!("State::input: Inputting: {:?}", input);
let step_opt = Some(qhb.as_mut().unwrap().input(input));
match step_opt {
Some(ref step) => match step {
Ok(s) => trace!("State::input: QHB output: {:?}", s.output),
Err(err) => error!("State::input: QHB output error: {:?}", err),
},
None => trace!("State::input: QHB Output is `None`"),
}
return step_opt;
},
| State::AwaitingMorePeersForKeyGeneration { ref iom_queue, .. }
| State::GeneratingKeys { ref iom_queue, .. }
| State::DeterminingNetworkState { ref iom_queue, .. } => {
trace!("State::input: Queueing input: {:?}", input);
iom_queue.as_ref().unwrap().push(InputOrMessage::Input(input));
},
s @ _ => panic!("State::handle_message: Must be connected in order to input to \
honey badger. State: {}", s.discriminant()),
}
None
}
/// Presents a message to HoneyBadger or queues it for later.
///
/// Cannot be called while disconnected or connection-pending.
pub(super) fn handle_message(&mut self, src_uid: &Uid, msg: Message)
-> Option<Result<Step, QhbError>> {
match self {
| State::Observer { ref mut qhb, .. }
| State::Validator { ref mut qhb, .. } => {
trace!("State::handle_message: Handling message: {:?}", msg);
let step_opt = Some(qhb.as_mut().unwrap().handle_message(src_uid, msg));
match step_opt {
Some(ref step) => match step {
Ok(s) => trace!("State::handle_message: QHB output: {:?}", s.output),
Err(err) => error!("State::handle_message: QHB output error: {:?}", err),
},
None => trace!("State::handle_message: QHB Output is `None`"),
}
return step_opt;
},
| State::AwaitingMorePeersForKeyGeneration { ref iom_queue, .. }
| State::GeneratingKeys { ref iom_queue, .. }
| State::DeterminingNetworkState { ref iom_queue, .. } => {
trace!("State::handle_message: Queueing message: {:?}", msg);
iom_queue.as_ref().unwrap().push(InputOrMessage::Message(*src_uid, msg));
},
// State::GeneratingKeys { ref iom_queue, .. } => {
// iom_queue.as_ref().unwrap().push(InputOrMessage::Message(msg));
// },
s @ _ => panic!("State::handle_message: Must be connected in order to input to \
honey badger. State: {}", s.discriminant()),
}
None
}
}

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#![cfg_attr(feature = "nightly", feature(alloc_system))]
#[cfg(feature = "nightly")]
extern crate alloc_system;
extern crate clap;
extern crate env_logger;
#[macro_use]
extern crate log;
#[macro_use]
extern crate failure;
extern crate crossbeam;
// #[macro_use] extern crate crossbeam_channel;
extern crate crypto;
extern crate chrono;
extern crate num_traits;
extern crate num_bigint;
#[macro_use]
extern crate futures;
extern crate tokio;
extern crate tokio_codec;
extern crate tokio_io;
extern crate rand;
extern crate bytes;
extern crate uuid;
extern crate byteorder;
#[macro_use]
extern crate serde_derive;
extern crate serde;
extern crate serde_bytes;
extern crate bincode;
extern crate tokio_serde_bincode;
extern crate parking_lot;
extern crate clear_on_drop;
extern crate hbbft;
#[cfg(feature = "nightly")]
use alloc_system::System;
#[cfg(feature = "nightly")]
#[global_allocator]
static A: System = System;
// pub mod network;
pub mod hydrabadger;
pub mod blockchain;
pub mod peer;
use std::{
collections::BTreeMap,
fmt::{self},
net::{SocketAddr},
ops::Deref,
};
use futures::{
StartSend, AsyncSink,
sync::mpsc,
};
use tokio::{
io,
net::{TcpStream},
prelude::*,
};
use tokio_io::codec::length_delimited::Framed;
use bytes::{BytesMut, Bytes};
use rand::{Rng, Rand};
use uuid::Uuid;
// use bincode::{serialize, deserialize};
use hbbft::{
crypto::{PublicKey, PublicKeySet},
sync_key_gen::{Part, Ack},
messaging::Step as MessagingStep,
dynamic_honey_badger::{Message as DhbMessage, JoinPlan},
queueing_honey_badger::{QueueingHoneyBadger, Input as QhbInput},
};
pub use hydrabadger::{Hydrabadger, Config};
pub use blockchain::{Blockchain, MiningError};
// FIME: TEMPORARY -- Create another error type.
pub use hydrabadger::{Error};
/// Transmit half of the wire message channel.
// TODO: Use a bounded tx/rx (find a sensible upper bound):
type WireTx = mpsc::UnboundedSender<WireMessage>;
/// Receive half of the wire message channel.
// TODO: Use a bounded tx/rx (find a sensible upper bound):
type WireRx = mpsc::UnboundedReceiver<WireMessage>;
/// Transmit half of the internal message channel.
// TODO: Use a bounded tx/rx (find a sensible upper bound):
type InternalTx = mpsc::UnboundedSender<InternalMessage>;
/// Receive half of the internal message channel.
// TODO: Use a bounded tx/rx (find a sensible upper bound):
type InternalRx = mpsc::UnboundedReceiver<InternalMessage>;
/// A transaction.
#[derive(Serialize, Deserialize, Eq, PartialEq, Hash, Ord, PartialOrd, Debug, Clone)]
pub struct Transaction(pub Vec<u8>);
impl Transaction {
fn random(len: usize) -> Transaction {
Transaction(rand::thread_rng().gen_iter().take(len).collect())
}
}
/// A unique identifier.
#[derive(Clone, Copy, Eq, Hash, Ord, PartialEq, PartialOrd, Serialize, Deserialize)]
pub struct Uid(pub(crate) Uuid);
impl Uid {
/// Returns a new, random `Uid`.
pub fn new() -> Uid {
Uid(Uuid::new_v4())
}
}
impl Rand for Uid {
fn rand<R: Rng>(_rng: &mut R) -> Uid {
Uid::new()
}
}
impl fmt::Display for Uid {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
fmt::LowerHex::fmt(&self.0, f)
}
}
impl fmt::Debug for Uid {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
fmt::LowerHex::fmt(&self.0, f)
}
}
type Message = DhbMessage<Uid>;
type Step = MessagingStep<QueueingHoneyBadger<Vec<Transaction>, Uid>>;
type Input = QhbInput<Vec<Transaction>, Uid>;
/// A peer's incoming (listening) address.
#[derive(Clone, Copy, Debug, Serialize, Deserialize, PartialEq, Eq, Hash)]
pub struct InAddr(pub SocketAddr);
impl Deref for InAddr {
type Target = SocketAddr;
fn deref(&self) -> &SocketAddr {
&self.0
}
}
impl fmt::Display for InAddr {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "InAddr({})", self.0)
}
}
/// An internal address used to respond to a connected peer.
#[derive(Clone, Copy, Debug, Serialize, Deserialize, PartialEq, Eq, Hash)]
pub struct OutAddr(pub SocketAddr);
impl Deref for OutAddr {
type Target = SocketAddr;
fn deref(&self) -> &SocketAddr {
&self.0
}
}
impl fmt::Display for OutAddr {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "OutAddr({})", self.0)
}
}
/// Nodes of the network.
#[derive(Clone, Debug, Serialize, Deserialize)]
pub struct NetworkNodeInfo {
pub(crate) uid: Uid,
pub(crate) in_addr: InAddr,
pub(crate) pk: PublicKey,
}
/// The current state of the network.
#[derive(Clone, Debug, Serialize, Deserialize)]
pub enum NetworkState {
None,
Unknown(Vec<NetworkNodeInfo>),
AwaitingMorePeersForKeyGeneration(Vec<NetworkNodeInfo>),
GeneratingKeys(Vec<NetworkNodeInfo>, BTreeMap<Uid, PublicKey>),
Active((Vec<NetworkNodeInfo>, PublicKeySet, BTreeMap<Uid, PublicKey>)),
}
/// Messages sent over the network between nodes.
#[derive(Clone, Debug, Serialize, Deserialize)]
pub enum WireMessageKind {
HelloFromValidator(Uid, InAddr, PublicKey, NetworkState),
HelloRequestChangeAdd(Uid, InAddr, PublicKey),
WelcomeReceivedChangeAdd(Uid, PublicKey, NetworkState),
RequestNetworkState,
NetworkState(NetworkState),
Goodbye,
#[serde(with = "serde_bytes")]
Bytes(Bytes),
Message(Uid, Message),
Transactions(Uid, Vec<Transaction>),
KeyGenPart(Part),
KeyGenAck(Ack),
JoinPlan(JoinPlan<Uid>)
// TargetedMessage(TargetedMessage<Uid>),
}
/// Messages sent over the network between nodes.
#[derive(Clone, Debug, Serialize, Deserialize)]
pub struct WireMessage {
kind: WireMessageKind,
}
impl WireMessage {
pub fn hello_from_validator(src_uid: Uid, in_addr: InAddr, pk: PublicKey,
net_state: NetworkState) -> WireMessage {
WireMessageKind::HelloFromValidator(src_uid, in_addr, pk, net_state).into()
}
/// Returns a `HelloRequestChangeAdd` variant.
pub fn hello_request_change_add(src_uid: Uid, in_addr: InAddr, pk: PublicKey) -> WireMessage {
WireMessage { kind: WireMessageKind::HelloRequestChangeAdd(src_uid, in_addr, pk), }
}
/// Returns a `WelcomeReceivedChangeAdd` variant.
pub fn welcome_received_change_add(src_uid: Uid, pk: PublicKey, net_state: NetworkState)
-> WireMessage {
WireMessage { kind: WireMessageKind::WelcomeReceivedChangeAdd(src_uid, pk, net_state) }
}
/// Returns an `Input` variant.
pub fn transaction(src_uid: Uid, txns: Vec<Transaction>) -> WireMessage {
WireMessage { kind: WireMessageKind::Transactions(src_uid, txns), }
}
/// Returns a `Message` variant.
pub fn message(src_uid: Uid, msg: Message) -> WireMessage {
WireMessage { kind: WireMessageKind::Message(src_uid, msg), }
}
pub fn key_gen_part(part: Part) -> WireMessage {
WireMessage { kind: WireMessageKind::KeyGenPart(part) }
}
pub fn key_gen_part_ack(outcome: Ack) -> WireMessage {
WireMessageKind::KeyGenAck(outcome).into()
}
pub fn join_plan(jp: JoinPlan<Uid>) -> WireMessage {
WireMessageKind::JoinPlan(jp).into()
}
/// Returns the wire message kind.
pub fn kind(&self) -> &WireMessageKind {
&self.kind
}
/// Consumes this `WireMessage` into its kind.
pub fn into_kind(self) -> WireMessageKind {
self.kind
}
}
impl From<WireMessageKind> for WireMessage {
fn from(kind: WireMessageKind) -> WireMessage {
WireMessage { kind }
}
}
/// A stream/sink of `WireMessage`s connected to a socket.
#[derive(Debug)]
pub struct WireMessages {
framed: Framed<TcpStream>,
}
impl WireMessages {
pub fn new(socket: TcpStream) -> WireMessages {
WireMessages {
framed: Framed::new(socket),
}
}
pub fn socket(&self) -> &TcpStream {
self.framed.get_ref()
}
pub fn send_msg(&mut self, msg: WireMessage) -> Result<(), Error> {
self.start_send(msg)?;
let _ = self.poll_complete()?;
Ok(())
}
}
impl Stream for WireMessages {
type Item = WireMessage;
type Error = Error;
fn poll(&mut self) -> Poll<Option<Self::Item>, Self::Error> {
match try_ready!(self.framed.poll()) {
Some(frame) => {
Ok(Async::Ready(Some(
// deserialize_from(frame.reader()).map_err(Error::Serde)?
bincode::deserialize(&frame.freeze()).map_err(Error::Serde)?
)))
}
None => Ok(Async::Ready(None))
}
}
}
impl Sink for WireMessages {
type SinkItem = WireMessage;
type SinkError = Error;
fn start_send(&mut self, item: Self::SinkItem) -> StartSend<Self::SinkItem, Self::SinkError> {
// TODO: Reuse buffer:
let mut serialized = BytesMut::new();
// Downgraded from bincode 1.0:
//
// Original: `bincode::serialize(&item)`
//
match bincode::serialize(&item, bincode::Bounded(1 << 20)) {
Ok(s) => serialized.extend_from_slice(&s),
Err(err) => return Err(Error::Io(io::Error::new(io::ErrorKind::Other, err))),
}
match self.framed.start_send(serialized) {
Ok(async_sink) => match async_sink {
AsyncSink::Ready => Ok(AsyncSink::Ready),
AsyncSink::NotReady(_) => Ok(AsyncSink::NotReady(item)),
},
Err(err) => Err(Error::Io(err))
}
}
fn poll_complete(&mut self) -> Poll<(), Self::SinkError> {
self.framed.poll_complete().map_err(Error::from)
}
fn close(&mut self) -> Poll<(), Self::SinkError> {
self.framed.close().map_err(Error::from)
}
}
/// A message between internal threads/tasks.
#[derive(Clone, Debug)]
pub enum InternalMessageKind {
Wire(WireMessage),
HbMessage(Message),
HbInput(Input),
PeerDisconnect,
NewIncomingConnection(InAddr, PublicKey, bool),
NewOutgoingConnection,
}
/// A message between internal threads/tasks.
#[derive(Clone, Debug)]
pub struct InternalMessage {
src_uid: Option<Uid>,
src_addr: OutAddr,
kind: InternalMessageKind,
}
impl InternalMessage {
pub fn new(src_uid: Option<Uid>, src_addr: OutAddr, kind: InternalMessageKind) -> InternalMessage {
InternalMessage { src_uid: src_uid, src_addr, kind }
}
/// Returns a new `InternalMessage` without a uid.
pub fn new_without_uid(src_addr: OutAddr, kind: InternalMessageKind) -> InternalMessage {
InternalMessage::new(None, src_addr, kind)
}
pub fn wire(src_uid: Option<Uid>, src_addr: OutAddr, wire_message: WireMessage) -> InternalMessage {
InternalMessage::new(src_uid, src_addr, InternalMessageKind::Wire(wire_message))
}
pub fn hb_message(src_uid: Uid, src_addr: OutAddr, msg: Message) -> InternalMessage {
InternalMessage::new(Some(src_uid), src_addr, InternalMessageKind::HbMessage(msg))
}
pub fn hb_input(src_uid: Uid, src_addr: OutAddr, input: Input) -> InternalMessage {
InternalMessage::new(Some(src_uid), src_addr, InternalMessageKind::HbInput(input))
}
pub fn peer_disconnect(src_uid: Uid, src_addr: OutAddr) -> InternalMessage {
InternalMessage::new(Some(src_uid), src_addr, InternalMessageKind::PeerDisconnect)
}
pub fn new_incoming_connection(src_uid: Uid, src_addr: OutAddr, src_in_addr: InAddr,
src_pk: PublicKey, request_change_add: bool) -> InternalMessage {
InternalMessage::new(Some(src_uid), src_addr,
InternalMessageKind::NewIncomingConnection(src_in_addr, src_pk, request_change_add))
}
pub fn new_outgoing_connection(src_addr: OutAddr) -> InternalMessage {
InternalMessage::new_without_uid(src_addr, InternalMessageKind::NewOutgoingConnection)
}
/// Returns the source unique identifier this message was received in.
pub fn src_uid(&self) -> Option<&Uid> {
self.src_uid.as_ref()
}
/// Returns the source socket this message was received on.
pub fn src_addr(&self) -> &OutAddr {
&self.src_addr
}
/// Returns the internal message kind.
pub fn kind(&self) -> &InternalMessageKind {
&self.kind
}
/// Consumes this `InternalMessage` into its parts.
pub fn into_parts(self) -> (Option<Uid>, OutAddr, InternalMessageKind) {
(self.src_uid, self.src_addr, self.kind)
}
}
use std::collections::HashSet;
use std::net::Ipv4Addr;
use std::net::IpAddr;
#[no_mangle]
pub extern fn rust_main1() {
let bind_address: SocketAddr = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 3000);
let mut remote_addresses: HashSet<SocketAddr> = HashSet::new();
remote_addresses.insert(SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 3001));
remote_addresses.insert(SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 3002));
let cfg = Config::default();
let hb = Hydrabadger::new(bind_address, cfg);
hb.run_node(Some(remote_addresses));
}
#[no_mangle]
pub extern fn rust_main2() {
let bind_address: SocketAddr = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 3001);
let mut remote_addresses: HashSet<SocketAddr> = HashSet::new();
remote_addresses.insert(SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 3000));
remote_addresses.insert(SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 3002));
let cfg = Config::default();
let hb = Hydrabadger::new(bind_address, cfg);
hb.run_node(Some(remote_addresses));
}
#[no_mangle]
pub extern fn rust_main3() {
let bind_address: SocketAddr = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 3002);
let mut remote_addresses: HashSet<SocketAddr> = HashSet::new();
remote_addresses.insert(SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 3001));
remote_addresses.insert(SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 3000));
let cfg = Config::default();
let hb = Hydrabadger::new(bind_address, cfg);
hb.run_node(Some(remote_addresses));
}
/// Expose the JNI interface for android below
#[cfg(target_os="android")]
#[allow(non_snake_case)]
pub mod android {
extern crate jni;
use super::*;
use self::jni::JNIEnv;
use self::jni::objects::{JClass};
use self::jni::sys::{jboolean};
#[no_mangle]
pub unsafe extern fn Java_ru_hintsolution_hbbft_hbbft_MainActivity_startNode1(_env: JNIEnv, _: JClass) -> jboolean {
// Our Java companion code might pass-in "world" as a string, hence the name.
rust_main1();
1
}
#[no_mangle]
pub unsafe extern fn Java_ru_hintsolution_hbbft_hbbft_MainActivity_startNode2(_env: JNIEnv, _: JClass) -> jboolean {
// Our Java companion code might pass-in "world" as a string, hence the name.
rust_main2();
1
}
#[no_mangle]
pub unsafe extern fn Java_ru_hintsolution_hbbft_hbbft_MainActivity_startNode3(_env: JNIEnv, _: JClass) -> jboolean {
// Our Java companion code might pass-in "world" as a string, hence the name.
rust_main3();
1
}
}

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//! A peer network node.
#![allow(unused_imports, dead_code, unused_variables, unused_mut)]
use std::{
collections::{
hash_map::{Iter as HashMapIter, Values as HashMapValues},
HashMap,
},
borrow::Borrow,
};
use futures::sync::mpsc;
use tokio::prelude::*;
use hbbft::crypto::PublicKey;
use hbbft::queueing_honey_badger::{Input as HbInput};
use ::{InternalMessage, WireMessage, WireMessageKind, WireMessages, WireTx, WireRx,
OutAddr, InAddr, Uid};
use hydrabadger::{Hydrabadger, Error,};
/// The state for each connected client.
pub struct PeerHandler {
// Peer uid.
uid: Option<Uid>,
// The incoming stream of messages:
wire_msgs: WireMessages,
/// Handle to the shared message state.
hdb: Hydrabadger,
// TODO: Consider adding back a separate clone of `peer_internal_tx`. Is
// there any difference if capacity isn't an issue? -- doubtful
/// Receive half of the message channel.
rx: WireRx,
/// Peer socket address.
out_addr: OutAddr,
}
impl PeerHandler {
/// Create a new instance of `Peer`.
pub fn new(pub_info: Option<(Uid, InAddr, PublicKey)>,
hdb: Hydrabadger, wire_msgs: WireMessages) -> PeerHandler {
// Get the client socket address
let out_addr = OutAddr(wire_msgs.socket().peer_addr().unwrap());
// Create a channel for this peer
let (tx, rx) = mpsc::unbounded();
let uid = pub_info.as_ref().map(|(uid, _, _)| uid.clone());
// Add an entry for this `Peer` in the shared state map.
hdb.peers_mut().add(out_addr, tx, pub_info);
PeerHandler {
uid,
wire_msgs,
hdb,
rx,
out_addr,
}
}
pub(crate) fn hdb(&self) -> &Hydrabadger {
&self.hdb
}
pub(crate) fn out_addr(&self) -> &OutAddr {
&self.out_addr
}
}
/// A future representing the client connection.
impl Future for PeerHandler {
type Item = ();
type Error = Error;
fn poll(&mut self) -> Poll<(), Error> {
const MESSAGES_PER_TICK: usize = 10;
// Receive all messages from peers.
for i in 0..MESSAGES_PER_TICK {
// Polling an `UnboundedReceiver` cannot fail, so `unwrap` here is
// safe.
match self.rx.poll().unwrap() {
Async::Ready(Some(v)) => {
// Buffer the message. Once all messages are buffered, they will
// be flushed to the socket (right below).
self.wire_msgs.start_send(v)?;
// Exceeded max messages per tick, schedule notification:
if i + 1 == MESSAGES_PER_TICK {
task::current().notify();
}
}
_ => break,
}
}
// Flush the write buffer to the socket
let _ = self.wire_msgs.poll_complete()?;
// Read new messages from the socket
while let Async::Ready(message) = self.wire_msgs.poll()? {
trace!("Received message: {:?}", message);
if let Some(msg) = message {
match msg.into_kind() {
WireMessageKind::HelloRequestChangeAdd(src_uid, _in_addr, _pub_key) => {
error!("Duplicate `WireMessage::HelloRequestChangeAdd` \
received from '{}'", src_uid);
},
WireMessageKind::WelcomeReceivedChangeAdd(src_uid, pk, net_state) => {
self.uid = Some(src_uid);
self.hdb.send_internal(
InternalMessage::wire(Some(src_uid), self.out_addr,
WireMessage::welcome_received_change_add(src_uid, pk, net_state)
)
);
},
WireMessageKind::Message(src_uid, msg) => {
// let uid = self.uid.clone()
// .expect("`WireMessageKind::Message` received before \
// establishing peer");
if let Some(peer_uid) = self.uid.as_ref() {
debug_assert_eq!(src_uid, *peer_uid);
}
self.hdb.send_internal(
InternalMessage::hb_message(src_uid, self.out_addr, msg)
)
},
WireMessageKind::Transactions(src_uid, txns) => {
if let Some(peer_uid) = self.uid.as_ref() {
debug_assert_eq!(src_uid, *peer_uid);
}
self.hdb.send_internal(
InternalMessage::hb_input(src_uid, self.out_addr, HbInput::User(txns))
)
},
kind @ _ => {
self.hdb.send_internal(InternalMessage::wire(self.uid.clone(),
self.out_addr, kind.into()))
}
}
} else {
// EOF was reached. The remote client has disconnected. There is
// nothing more to do.
info!("Peer ({}: '{}') disconnected.", self.out_addr, self.uid.clone().unwrap());
return Ok(Async::Ready(()));
}
}
// As always, it is important to not just return `NotReady` without
// ensuring an inner future also returned `NotReady`.
//
// We know we got a `NotReady` from either `self.rx` or `self.wire_msgs`, so
// the contract is respected.
Ok(Async::NotReady)
}
}
impl Drop for PeerHandler {
fn drop(&mut self) {
debug!("Removing peer ({}: '{}') from the list of peers.",
self.out_addr, self.uid.clone().unwrap());
// Remove peer transmitter from the lists:
self.hdb.peers_mut().remove(&self.out_addr);
if let Some(uid) = self.uid.clone() {
debug!("Sending peer ({}: '{}') disconnect internal message.",
self.out_addr, self.uid.clone().unwrap());
self.hdb.send_internal(InternalMessage::peer_disconnect(
uid, self.out_addr));
}
}
}
#[derive(Clone, Debug)]
#[allow(dead_code)]
enum State {
Handshaking,
PendingJoinInfo {
uid: Uid,
in_addr: InAddr,
pk: PublicKey,
},
EstablishedObserver {
uid: Uid,
in_addr: InAddr,
pk: PublicKey,
},
EstablishedValidator {
uid: Uid,
in_addr: InAddr,
pk: PublicKey,
},
}
/// Nodes of the network.
#[derive(Clone, Debug)]
pub struct Peer {
out_addr: OutAddr,
tx: WireTx,
state: State,
}
impl Peer {
/// Returns a new `Peer`
fn new(out_addr: OutAddr, tx: WireTx,
// uid: Option<Uid>, in_addr: Option<InAddr>, pk: Option<PublicKey>
pub_info: Option<(Uid, InAddr, PublicKey)>,
) -> Peer {
// assert!(uid.is_some() == in_addr.is_some() && uid.is_some() == pk.is_some());
let state = match pub_info {
None => State::Handshaking,
Some((uid, in_addr, pk)) => State::EstablishedValidator { uid, in_addr, pk },
};
Peer {
out_addr,
tx,
state,
}
}
/// Sets a peer state to `State::PendingJoinInfo` and stores public info.
fn set_pending(&mut self, pub_info: (Uid, InAddr, PublicKey)) {
self.state = match self.state {
State::Handshaking => {
State::PendingJoinInfo {
uid: pub_info.0,
in_addr: pub_info.1,
pk: pub_info.2
}
},
_ => panic!("Peer::set_pending: Can only set pending when \
peer state is `Handshaking`."),
};
}
/// Sets a peer state to `State::EstablishedObserver` and stores public info.
fn establish_observer(&mut self) {
self.state = match self.state {
State::PendingJoinInfo { uid, in_addr, pk } => {
State::EstablishedObserver {
uid,
in_addr,
pk,
}
},
_ => panic!("Peer::establish_observer: Can only establish observer when \
peer state is`PendingJoinInfo`."),
};
}
/// Sets a peer state to `State::EstablishedValidator` and stores public info.
fn establish_validator(&mut self, pub_info: Option<(Uid, InAddr, PublicKey)>) {
self.state = match self.state {
State::Handshaking => match pub_info {
Some(pi) => {
State::EstablishedValidator {
uid: pi.0,
in_addr: pi.1,
pk: pi.2
}
},
None => {
panic!("Peer::establish_validator: `pub_info` must be supplied \
when establishing a validator from `Handshaking`.");
},
},
State::EstablishedObserver { uid, in_addr, pk } => {
if let Some(_) = pub_info {
panic!("Peer::establish_validator: `pub_info` must be `None` \
when upgrading an observer node.");
}
State::EstablishedValidator {
uid,
in_addr,
pk,
}
},
_ => panic!("Peer::establish_validator: Can only establish validator when \
peer state is`Handshaking` or `EstablishedObserver`."),
};
}
/// Returns the peer's unique identifier.
pub fn uid(&self) -> Option<&Uid> {
match self.state {
State::Handshaking => None,
State::PendingJoinInfo { ref uid, .. } => Some(uid),
State::EstablishedObserver { ref uid, .. } => Some(uid),
State::EstablishedValidator { ref uid, .. } => Some(uid),
}
}
/// Returns the peer's unique identifier.
pub fn out_addr(&self) -> &OutAddr {
&self.out_addr
}
/// Returns the peer's public key.
pub fn public_key(&self) -> Option<&PublicKey> {
match self.state {
State::Handshaking => None,
State::PendingJoinInfo { ref pk, .. } => Some(pk),
State::EstablishedObserver { ref pk, .. } => Some(pk),
State::EstablishedValidator { ref pk, .. } => Some(pk),
}
}
/// Returns the peer's incoming (listening) socket address.
pub fn in_addr(&self) -> Option<&InAddr> {
match self.state {
State::Handshaking => None,
State::PendingJoinInfo { ref in_addr, .. } => Some(in_addr),
State::EstablishedObserver { ref in_addr, .. } => Some(in_addr),
State::EstablishedValidator { ref in_addr, .. } => Some(in_addr),
}
}
/// Returns the peer's public info if established.
pub fn pub_info(&self) -> Option<(&Uid, &InAddr, &PublicKey)> {
match self.state {
State::Handshaking => None,
State::EstablishedObserver { ref uid, ref in_addr, ref pk } => Some((uid, in_addr, pk)),
State::PendingJoinInfo { ref uid, ref in_addr, ref pk } => Some((uid, in_addr, pk)),
State::EstablishedValidator { ref uid, ref in_addr, ref pk } => Some((uid, in_addr, pk)),
}
}
/// Returns true if this peer is pending.
pub fn is_pending(&self) -> bool {
match self.state {
State::PendingJoinInfo { .. } => true,
_ => false,
}
}
/// Returns true if this peer is an established observer.
pub fn is_observer(&self) -> bool {
match self.state {
State::EstablishedObserver { .. } => true,
_ => false,
}
}
/// Returns true if this peer is an established validator.
pub fn is_validator(&self) -> bool {
match self.state {
State::EstablishedValidator { .. } => true,
_ => false,
}
}
/// Returns the peer's wire transmitter.
pub fn tx(&self) -> &WireTx {
&self.tx
}
}
/// Peer nodes of the network.
//
// TODO: Keep a separate `HashSet` of validator `OutAddrs` to avoid having to
// iterate through entire list.
#[derive(Debug)]
pub(crate) struct Peers {
peers: HashMap<OutAddr, Peer>,
out_addrs: HashMap<Uid, OutAddr>,
}
impl Peers {
/// Returns a new empty list of peers.
pub(crate) fn new() -> Peers {
Peers {
peers: HashMap::with_capacity(64),
out_addrs: HashMap::with_capacity(64),
}
}
/// Adds a peer to the list.
pub(crate) fn add(&mut self, out_addr: OutAddr, tx: WireTx,
// uid: Option<Uid>, in_addr: Option<InAddr>, pk: Option<PublicKey>
pub_info: Option<(Uid, InAddr, PublicKey)>,
) {
let peer = Peer::new(out_addr, tx, pub_info);
if let State::EstablishedValidator { uid, .. } = peer.state {
self.out_addrs.insert(uid, peer.out_addr);
}
self.peers.insert(peer.out_addr, peer);
}
/// Attempts to set peer as pending-join-info, storing `pub_info`.
///
/// Returns `true` if the peer was already pending.
///
/// ### Panics
///
/// Peer state must be `Handshaking`.
///
/// TODO: Error handling...
pub(crate) fn set_pending<O: Borrow<OutAddr>>(&mut self, out_addr: O,
pub_info: (Uid, InAddr, PublicKey)) -> bool {
let peer = self.peers.get_mut(out_addr.borrow())
.expect(&format!("Peers::set_pending: \
No peer found with outgoing address: {}", out_addr.borrow()));
match self.out_addrs.insert(pub_info.0, *out_addr.borrow()) {
Some(_out_addr_pub) => {
let pi_pub = peer.pub_info()
.expect("Peers::set_pending: internal consistency error");
assert!(pub_info.0 == *pi_pub.0 && pub_info.1 == *pi_pub.1 && pub_info.2 == *pi_pub.2);
assert!(peer.is_validator());
return true;
},
None => peer.set_pending(pub_info),
}
// false
panic!("Peer::set_pending: Do not use yet.");
}
/// Attempts to establish a peer as an observer.
///
/// ### Panics
///
/// Peer state must be `Handshaking`.
///
/// TODO: Error handling...
pub(crate) fn establish_observer<O: Borrow<OutAddr>>(&mut self, out_addr: O) {
let peer = self.peers.get_mut(out_addr.borrow())
.expect(&format!("Peers::establish_observer: \
No peer found with outgoing address: {}", out_addr.borrow()));
// peer.establish_observer()
panic!("Peer::set_pending: Do not use yet.");
}
/// Attempts to establish a peer as a validator, storing `pub_info`.
///
/// Returns `true` if the peer was already an established validator.
///
/// ### Panics
///
/// Peer state must be `Handshaking` or `EstablishedObserver`.
///
/// TODO: Error handling...
pub(crate) fn establish_validator<O: Borrow<OutAddr>>(&mut self, out_addr: O,
pub_info: (Uid, InAddr, PublicKey)) -> bool {
let peer = self.peers.get_mut(out_addr.borrow())
.expect(&format!("Peers::establish_validator: \
No peer found with outgoing address: {}", out_addr.borrow()));
match self.out_addrs.insert(pub_info.0, *out_addr.borrow()) {
Some(_out_addr_pub) => {
let pi_pub = peer.pub_info()
.expect("Peers::establish_validator: internal consistency error");
assert!(pub_info.0 == *pi_pub.0 && pub_info.1 == *pi_pub.1 && pub_info.2 == *pi_pub.2);
assert!(peer.is_validator());
return true;
},
None => peer.establish_validator(Some(pub_info)),
}
false
}
/// Removes a peer the list if it exists.
pub(crate) fn remove<O: Borrow<OutAddr>>(&mut self, out_addr: O) {
let peer = self.peers.remove(out_addr.borrow());
if let Some(p) = peer {
if let Some(uid) = p.uid() {
self.out_addrs.remove(&uid);
}
}
}
pub(crate) fn get<O: Borrow<OutAddr>>(&self, out_addr: O) -> Option<&Peer> {
self.peers.get(out_addr.borrow())
}
pub(crate) fn get_by_uid<U: Borrow<Uid>>(&self, uid: U) -> Option<&Peer> {
// self.peers.get()
self.out_addrs.get(uid.borrow()).and_then(|addr| self.get(addr))
}
/// Returns an Iterator over the list of peers.
pub(crate) fn iter(&self) -> HashMapIter<OutAddr, Peer> {
self.peers.iter()
}
/// Returns an Iterator over the list of peers.
pub(crate) fn peers(&self) -> HashMapValues<OutAddr, Peer> {
self.peers.values()
}
/// Returns an iterator over the list of validators.
pub(crate) fn validators(&self) -> impl Iterator<Item = &Peer> {
self.peers.values().filter(|p| p.is_validator())
}
/// Returns the current number of connected peers.
pub(crate) fn count_total(&self) -> usize {
self.peers.len()
}
/// Returns the current number of connected and established validators.
///
/// This is semi-expensive (O(n)).
pub(crate) fn count_validators(&self) -> usize {
self.validators().count()
}
pub(crate) fn contains_in_addr<I: Borrow<InAddr>>(&self, in_addr: I) -> bool {
for peer in self.peers.values() {
if let Some(peer_in_addr) = peer.in_addr() {
if peer_in_addr == in_addr.borrow() {
return true;
}
}
}
false
}
}