Initial work towards v0.2.0 (#924)

* Remove ping protocol

* Initial renaming of network services

* Correct rebasing relative to latest master

* Start updating types

* Adds HashMapDelay struct to utils

* Initial network restructure

* Network restructure. Adds new types for v0.2.0

* Removes build artefacts

* Shift validation to beacon chain

* Temporarily remove gossip validation

This is to be updated to match current optimisation efforts.

* Adds AggregateAndProof

* Begin rebuilding pubsub encoding/decoding

* Signature hacking

* Shift gossipsup decoding into eth2_libp2p

* Existing EF tests passing with fake_crypto

* Shifts block encoding/decoding into RPC

* Delete outdated API spec

* All release tests passing bar genesis state parsing

* Update and test YamlConfig

* Update to spec v0.10 compatible BLS

* Updates to BLS EF tests

* Add EF test for AggregateVerify

And delete unused hash2curve tests for uncompressed points

* Update EF tests to v0.10.1

* Use optional block root correctly in block proc

* Use genesis fork in deposit domain. All tests pass

* Fast aggregate verify test

* Update REST API docs

* Fix unused import

* Bump spec tags to v0.10.1

* Add `seconds_per_eth1_block` to chainspec

* Update to timestamp based eth1 voting scheme

* Return None from `get_votes_to_consider` if block cache is empty

* Handle overflows in `is_candidate_block`

* Revert to failing tests

* Fix eth1 data sets test

* Choose default vote according to spec

* Fix collect_valid_votes tests

* Fix `get_votes_to_consider` to choose all eligible blocks

* Uncomment winning_vote tests

* Add comments; remove unused code

* Reduce seconds_per_eth1_block for simulation

* Addressed review comments

* Add test for default vote case

* Fix logs

* Remove unused functions

* Meter default eth1 votes

* Fix comments

* Progress on attestation service

* Address review comments; remove unused dependency

* Initial work on removing libp2p lock

* Add LRU caches to store (rollup)

* Update attestation validation for DB changes (WIP)

* Initial version of should_forward_block

* Scaffold

* Progress on attestation validation

Also, consolidate prod+testing slot clocks so that they share much
of the same implementation and can both handle sub-slot time changes.

* Removes lock from libp2p service

* Completed network lock removal

* Finish(?) attestation processing

* Correct network termination future

* Add slot check to block check

* Correct fmt issues

* Remove Drop implementation for network service

* Add first attempt at attestation proc. re-write

* Add version 2 of attestation processing

* Minor fixes

* Add validator pubkey cache

* Make get_indexed_attestation take a committee

* Link signature processing into new attn verification

* First working version

* Ensure pubkey cache is updated

* Add more metrics, slight optimizations

* Clone committee cache during attestation processing

* Update shuffling cache during block processing

* Remove old commented-out code

* Fix shuffling cache insert bug

* Used indexed attestation in fork choice

* Restructure attn processing, add metrics

* Add more detailed metrics

* Tidy, fix failing tests

* Fix failing tests, tidy

* Address reviewers suggestions

* Disable/delete two outdated tests

* Modification of validator for subscriptions

* Add slot signing to validator client

* Further progress on validation subscription

* Adds necessary validator subscription functionality

* Add new Pubkeys struct to signature_sets

* Refactor with functional approach

* Update beacon chain

* Clean up validator <-> beacon node http types

* Add aggregator status to ValidatorDuty

* Impl Clone for manual slot clock

* Fix minor errors

* Further progress validator client subscription

* Initial subscription and aggregation handling

* Remove decompressed member from pubkey bytes

* Progress to modifying val client for attestation aggregation

* First draft of validator client upgrade for aggregate attestations

* Add hashmap for indices lookup

* Add state cache, remove store cache

* Only build the head committee cache

* Removes lock on a network channel

* Partially implement beacon node subscription http api

* Correct compilation issues

* Change `get_attesting_indices` to use Vec

* Fix failing test

* Partial implementation of timer

* Adds timer, removes exit_future, http api to op pool

* Partial multiple aggregate attestation handling

* Permits bulk messages accross gossipsub network channel

* Correct compile issues

* Improve gosispsub messaging and correct rest api helpers

* Added global gossipsub subscriptions

* Update validator subscriptions data structs

* Tidy

* Re-structure validator subscriptions

* Initial handling of subscriptions

* Re-structure network service

* Add pubkey cache persistence file

* Add more comments

* Integrate persistence file into builder

* Add pubkey cache tests

* Add HashSetDelay and introduce into attestation service

* Handles validator subscriptions

* Add data_dir to beacon chain builder

* Remove Option in pubkey cache persistence file

* Ensure consistency between datadir/data_dir

* Fix failing network test

* Peer subnet discovery gets queued for future subscriptions

* Reorganise attestation service functions

* Initial wiring of attestation service

* First draft of attestation service timing logic

* Correct minor typos

* Tidy

* Fix todos

* Improve tests

* Add PeerInfo to connected peers mapping

* Fix compile error

* Fix compile error from merge

* Split up block processing metrics

* Tidy

* Refactor get_pubkey_from_state

* Remove commented-out code

* Rename state_cache -> checkpoint_cache

* Rename Checkpoint -> Snapshot

* Tidy, add comments

* Tidy up find_head function

* Change some checkpoint -> snapshot

* Add tests

* Expose max_len

* Remove dead code

* Tidy

* Fix bug

* Add sync-speed metric

* Add first attempt at VerifiableBlock

* Start integrating into beacon chain

* Integrate VerifiableBlock

* Rename VerifableBlock -> PartialBlockVerification

* Add start of typed methods

* Add progress

* Add further progress

* Rename structs

* Add full block verification to block_processing.rs

* Further beacon chain integration

* Update checks for gossip

* Add todo

* Start adding segement verification

* Add passing chain segement test

* Initial integration with batch sync

* Minor changes

* Tidy, add more error checking

* Start adding chain_segment tests

* Finish invalid signature tests

* Include single and gossip verified blocks in tests

* Add gossip verification tests

* Start adding docs

* Finish adding comments to block_processing.rs

* Rename block_processing.rs -> block_verification

* Start removing old block processing code

* Fixes beacon_chain compilation

* Fix project-wide compile errors

* Remove old code

* Correct code to pass all tests

* Fix bug with beacon proposer index

* Fix shim for BlockProcessingError

* Only process one epoch at a time

* Fix loop in chain segment processing

* Correct tests from master merge

* Add caching for state.eth1_data_votes

* Add BeaconChain::validator_pubkey

* Revert "Add caching for state.eth1_data_votes"

This reverts commit cd73dcd643.

Co-authored-by: Grant Wuerker <gwuerker@gmail.com>
Co-authored-by: Michael Sproul <michael@sigmaprime.io>
Co-authored-by: Michael Sproul <micsproul@gmail.com>
Co-authored-by: pawan <pawandhananjay@gmail.com>
Co-authored-by: Paul Hauner <paul@paulhauner.com>

beacon_node/client/src/builder.rs

@@ -14,13 +14,13 @@ use beacon_chain::{
 use environment::RuntimeContext;
 use eth1::{Config as Eth1Config, Service as Eth1Service};
 use eth2_config::Eth2Config;
-use exit_future::Signal;
+use eth2_libp2p::NetworkGlobals;
 use futures::{future, Future, IntoFuture};
 use genesis::{
     generate_deterministic_keypairs, interop_genesis_state, state_from_ssz_file, Eth1GenesisService,
 };
 use lighthouse_bootstrap::Bootstrapper;
-use network::{NetworkConfig, NetworkMessage, Service as NetworkService};
+use network::{NetworkConfig, NetworkMessage, NetworkService};
 use slog::info;
 use ssz::Decode;
 use std::net::SocketAddr;
@@ -56,10 +56,10 @@ pub struct ClientBuilder<T: BeaconChainTypes> {
     beacon_chain_builder: Option<BeaconChainBuilder<T>>,
     beacon_chain: Option<Arc<BeaconChain<T>>>,
     eth1_service: Option<Eth1Service>,
-    exit_signals: Vec<Signal>,
+    exit_channels: Vec<tokio::sync::oneshot::Sender<()>>,
     event_handler: Option<T::EventHandler>,
-    libp2p_network: Option<Arc<NetworkService<T>>>,
-    libp2p_network_send: Option<UnboundedSender<NetworkMessage>>,
+    network_globals: Option<Arc<NetworkGlobals<T::EthSpec>>>,
+    network_send: Option<UnboundedSender<NetworkMessage<T::EthSpec>>>,
     http_listen_addr: Option<SocketAddr>,
     websocket_listen_addr: Option<SocketAddr>,
     eth_spec_instance: T::EthSpec,
@@ -90,10 +90,10 @@ where
             beacon_chain_builder: None,
             beacon_chain: None,
             eth1_service: None,
-            exit_signals: vec![],
+            exit_channels: vec![],
             event_handler: None,
-            libp2p_network: None,
-            libp2p_network_send: None,
+            network_globals: None,
+            network_send: None,
             http_listen_addr: None,
             websocket_listen_addr: None,
             eth_spec_instance,
@@ -249,24 +249,55 @@ where
             })
     }
 
-    /// Immediately starts the libp2p networking stack.
-    pub fn libp2p_network(mut self, config: &NetworkConfig) -> Result<Self, String> {
+    /// Immediately starts the networking stack.
+    pub fn network(mut self, config: &NetworkConfig) -> Result<Self, String> {
         let beacon_chain = self
             .beacon_chain
             .clone()
-            .ok_or_else(|| "libp2p_network requires a beacon chain")?;
+            .ok_or_else(|| "network requires a beacon chain")?;
         let context = self
             .runtime_context
             .as_ref()
-            .ok_or_else(|| "libp2p_network requires a runtime_context")?
+            .ok_or_else(|| "network requires a runtime_context")?
             .service_context("network".into());
 
-        let (network, network_send) =
-            NetworkService::new(beacon_chain, config, &context.executor, context.log)
-                .map_err(|e| format!("Failed to start libp2p network: {:?}", e))?;
+        let (network_globals, network_send, network_exit) =
+            NetworkService::start(beacon_chain, config, &context.executor, context.log)
+                .map_err(|e| format!("Failed to start network: {:?}", e))?;
 
-        self.libp2p_network = Some(network);
-        self.libp2p_network_send = Some(network_send);
+        self.network_globals = Some(network_globals);
+        self.network_send = Some(network_send);
+        self.exit_channels.push(network_exit);
+
+        Ok(self)
+    }
+
+    /// Immediately starts the timer service.
+    fn timer(mut self) -> Result<Self, String> {
+        let context = self
+            .runtime_context
+            .as_ref()
+            .ok_or_else(|| "node timer requires a runtime_context")?
+            .service_context("node_timer".into());
+        let beacon_chain = self
+            .beacon_chain
+            .clone()
+            .ok_or_else(|| "node timer requires a beacon chain")?;
+        let milliseconds_per_slot = self
+            .chain_spec
+            .as_ref()
+            .ok_or_else(|| "node timer requires a chain spec".to_string())?
+            .milliseconds_per_slot;
+
+        let timer_exit = timer::spawn(
+            &context.executor,
+            beacon_chain,
+            milliseconds_per_slot,
+            context.log,
+        )
+        .map_err(|e| format!("Unable to start node timer: {}", e))?;
+
+        self.exit_channels.push(timer_exit);
 
         Ok(self)
     }
@@ -286,21 +317,21 @@ where
             .as_ref()
             .ok_or_else(|| "http_server requires a runtime_context")?
             .service_context("http".into());
-        let network = self
-            .libp2p_network
+        let network_globals = self
+            .network_globals
             .clone()
             .ok_or_else(|| "http_server requires a libp2p network")?;
         let network_send = self
-            .libp2p_network_send
+            .network_send
             .clone()
             .ok_or_else(|| "http_server requires a libp2p network sender")?;
 
         let network_info = rest_api::NetworkInfo {
-            network_service: network,
+            network_globals,
             network_chan: network_send,
         };
 
-        let (exit_signal, listening_addr) = rest_api::start_server(
+        let (exit_channel, listening_addr) = rest_api::start_server(
             &client_config.rest_api,
             &context.executor,
             beacon_chain,
@@ -316,7 +347,7 @@ where
         )
         .map_err(|e| format!("Failed to start HTTP API: {:?}", e))?;
 
-        self.exit_signals.push(exit_signal);
+        self.exit_channels.push(exit_channel);
         self.http_listen_addr = Some(listening_addr);
 
         Ok(self)
@@ -333,8 +364,8 @@ where
             .beacon_chain
             .clone()
             .ok_or_else(|| "slot_notifier requires a beacon chain")?;
-        let network = self
-            .libp2p_network
+        let network_globals = self
+            .network_globals
             .clone()
             .ok_or_else(|| "slot_notifier requires a libp2p network")?;
         let milliseconds_per_slot = self
@@ -343,10 +374,15 @@ where
             .ok_or_else(|| "slot_notifier requires a chain spec".to_string())?
             .milliseconds_per_slot;
 
-        let exit_signal = spawn_notifier(context, beacon_chain, network, milliseconds_per_slot)
-            .map_err(|e| format!("Unable to start slot notifier: {}", e))?;
+        let exit_channel = spawn_notifier(
+            context,
+            beacon_chain,
+            network_globals,
+            milliseconds_per_slot,
+        )
+        .map_err(|e| format!("Unable to start slot notifier: {}", e))?;
 
-        self.exit_signals.push(exit_signal);
+        self.exit_channels.push(exit_channel);
 
         Ok(self)
     }
@@ -361,10 +397,10 @@ where
     {
         Client {
             beacon_chain: self.beacon_chain,
-            libp2p_network: self.libp2p_network,
+            network_globals: self.network_globals,
             http_listen_addr: self.http_listen_addr,
             websocket_listen_addr: self.websocket_listen_addr,
-            _exit_signals: self.exit_signals,
+            _exit_channels: self.exit_channels,
         }
     }
 }
@@ -404,7 +440,8 @@ where
         self.beacon_chain_builder = None;
         self.event_handler = None;
 
-        Ok(self)
+        // a beacon chain requires a timer
+        self.timer()
     }
 }
 
@@ -434,7 +471,7 @@ where
             .ok_or_else(|| "websocket_event_handler requires a runtime_context")?
             .service_context("ws".into());
 
-        let (sender, exit_signal, listening_addr): (
+        let (sender, exit_channel, listening_addr): (
             WebSocketSender<TEthSpec>,
             Option<_>,
             Option<_>,
@@ -446,8 +483,8 @@ where
             (WebSocketSender::dummy(), None, None)
         };
 
-        if let Some(signal) = exit_signal {
-            self.exit_signals.push(signal);
+        if let Some(channel) = exit_channel {
+            self.exit_channels.push(channel);
         }
         self.event_handler = Some(sender);
         self.websocket_listen_addr = listening_addr;
@@ -648,8 +685,8 @@ where
         self.eth1_service = None;
 
         let exit = {
-            let (tx, rx) = exit_future::signal();
-            self.exit_signals.push(tx);
+            let (tx, rx) = tokio::sync::oneshot::channel();
+            self.exit_channels.push(tx);
             rx
         };
 
@@ -711,7 +748,7 @@ where
             .ok_or_else(|| "system_time_slot_clock requires a beacon_chain_builder")?;
 
         let genesis_time = beacon_chain_builder
-            .finalized_checkpoint
+            .finalized_snapshot
             .as_ref()
             .ok_or_else(|| "system_time_slot_clock requires an initialized beacon state")?
             .beacon_state