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* Delete outdated API spec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>

eth2/utils/slot_clock/src/lib.rs

@@ -1,14 +1,15 @@
 #[macro_use]
 extern crate lazy_static;
 
+mod manual_slot_clock;
 mod metrics;
 mod system_time_slot_clock;
-mod testing_slot_clock;
 
 use std::time::Duration;
 
+pub use crate::manual_slot_clock::ManualSlotClock;
+pub use crate::manual_slot_clock::ManualSlotClock as TestingSlotClock;
 pub use crate::system_time_slot_clock::SystemTimeSlotClock;
-pub use crate::testing_slot_clock::TestingSlotClock;
 pub use metrics::scrape_for_metrics;
 pub use types::Slot;
 
@@ -16,13 +17,21 @@ pub use types::Slot;
 ///
 /// The clock is not required to be monotonically increasing and may go backwards.
 pub trait SlotClock: Send + Sync + Sized {
-    /// Creates a new slot clock where the first slot is `genesis_slot`, genesis occured
+    /// Creates a new slot clock where the first slot is `genesis_slot`, genesis occurred
     /// `genesis_duration` after the `UNIX_EPOCH` and each slot is `slot_duration` apart.
     fn new(genesis_slot: Slot, genesis_duration: Duration, slot_duration: Duration) -> Self;
 
     /// Returns the slot at this present time.
     fn now(&self) -> Option<Slot>;
 
+    /// Returns the present time as a duration since the UNIX epoch.
+    ///
+    /// Returns `None` if the present time is before the UNIX epoch (unlikely).
+    fn now_duration(&self) -> Option<Duration>;
+
+    /// Returns the slot of the given duration since the UNIX epoch.
+    fn slot_of(&self, now: Duration) -> Option<Slot>;
+
     /// Returns the duration between slots
     fn slot_duration(&self) -> Duration;
 

eth2/utils/slot_clock/src/manual_slot_clock.rs

@@ -0,0 +1,165 @@
+use super::SlotClock;
+use parking_lot::RwLock;
+use std::convert::TryInto;
+use std::time::Duration;
+use types::Slot;
+
+/// Determines the present slot based upon a manually-incremented UNIX timestamp.
+pub struct ManualSlotClock {
+    genesis_slot: Slot,
+    /// Duration from UNIX epoch to genesis.
+    genesis_duration: Duration,
+    /// Duration from UNIX epoch to right now.
+    current_time: RwLock<Duration>,
+    /// The length of each slot.
+    slot_duration: Duration,
+}
+
+impl Clone for ManualSlotClock {
+    fn clone(&self) -> Self {
+        ManualSlotClock {
+            genesis_slot: self.genesis_slot.clone(),
+            genesis_duration: self.genesis_duration.clone(),
+            current_time: RwLock::new(self.current_time.read().clone()),
+            slot_duration: self.slot_duration.clone(),
+        }
+    }
+}
+
+impl ManualSlotClock {
+    pub fn set_slot(&self, slot: u64) {
+        let slots_since_genesis = slot
+            .checked_sub(self.genesis_slot.as_u64())
+            .expect("slot must be post-genesis")
+            .try_into()
+            .expect("slot must fit within a u32");
+        *self.current_time.write() =
+            self.genesis_duration + self.slot_duration * slots_since_genesis;
+    }
+
+    pub fn advance_slot(&self) {
+        self.set_slot(self.now().unwrap().as_u64() + 1)
+    }
+
+    pub fn duration_to_next_slot_from(&self, now: Duration) -> Option<Duration> {
+        let genesis = self.genesis_duration;
+
+        let slot_start = |slot: Slot| -> Duration {
+            let slot = slot.as_u64() as u32;
+            genesis + slot * self.slot_duration
+        };
+
+        if now >= genesis {
+            Some(
+                slot_start(self.slot_of(now)? + 1)
+                    .checked_sub(now)
+                    .expect("The next slot cannot start before now"),
+            )
+        } else {
+            Some(
+                genesis
+                    .checked_sub(now)
+                    .expect("Control flow ensures genesis is greater than or equal to now"),
+            )
+        }
+    }
+
+    pub fn duration_to_next_epoch_from(
+        &self,
+        now: Duration,
+        slots_per_epoch: u64,
+    ) -> Option<Duration> {
+        let genesis = self.genesis_duration;
+
+        let slot_start = |slot: Slot| -> Duration {
+            let slot = slot.as_u64() as u32;
+            genesis + slot * self.slot_duration
+        };
+
+        let epoch_start_slot = self
+            .now()
+            .map(|slot| slot.epoch(slots_per_epoch))
+            .map(|epoch| (epoch + 1).start_slot(slots_per_epoch))?;
+
+        if now >= genesis {
+            Some(
+                slot_start(epoch_start_slot)
+                    .checked_sub(now)
+                    .expect("The next epoch cannot start before now"),
+            )
+        } else {
+            Some(
+                genesis
+                    .checked_sub(now)
+                    .expect("Control flow ensures genesis is greater than or equal to now"),
+            )
+        }
+    }
+}
+
+impl SlotClock for ManualSlotClock {
+    fn new(genesis_slot: Slot, genesis_duration: Duration, slot_duration: Duration) -> Self {
+        if slot_duration.as_millis() == 0 {
+            panic!("ManualSlotClock cannot have a < 1ms slot duration");
+        }
+
+        Self {
+            genesis_slot,
+            current_time: RwLock::new(genesis_duration.clone()),
+            genesis_duration,
+            slot_duration,
+        }
+    }
+
+    fn now(&self) -> Option<Slot> {
+        self.slot_of(*self.current_time.read())
+    }
+
+    fn now_duration(&self) -> Option<Duration> {
+        Some(*self.current_time.read())
+    }
+
+    fn slot_of(&self, now: Duration) -> Option<Slot> {
+        let genesis = self.genesis_duration;
+
+        if now >= genesis {
+            let since_genesis = now
+                .checked_sub(genesis)
+                .expect("Control flow ensures now is greater than or equal to genesis");
+            let slot =
+                Slot::from((since_genesis.as_millis() / self.slot_duration.as_millis()) as u64);
+            Some(slot + self.genesis_slot)
+        } else {
+            None
+        }
+    }
+
+    fn duration_to_next_slot(&self) -> Option<Duration> {
+        self.duration_to_next_slot_from(*self.current_time.read())
+    }
+
+    fn duration_to_next_epoch(&self, slots_per_epoch: u64) -> Option<Duration> {
+        self.duration_to_next_epoch_from(*self.current_time.read(), slots_per_epoch)
+    }
+
+    fn slot_duration(&self) -> Duration {
+        self.slot_duration
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_slot_now() {
+        let clock = ManualSlotClock::new(
+            Slot::new(10),
+            Duration::from_secs(0),
+            Duration::from_secs(1),
+        );
+        assert_eq!(clock.now(), Some(Slot::new(10)));
+        clock.set_slot(123);
+        assert_eq!(clock.now(), Some(Slot::new(123)));
+    }
+}

eth2/utils/slot_clock/src/system_time_slot_clock.rs

@@ -1,4 +1,4 @@
-use super::SlotClock;
+use super::{ManualSlotClock, SlotClock};
 use std::time::{Duration, SystemTime, UNIX_EPOCH};
 use types::Slot;
 
@@ -7,95 +7,41 @@ pub use std::time::SystemTimeError;
 /// Determines the present slot based upon the present system time.
 #[derive(Clone)]
 pub struct SystemTimeSlotClock {
-    genesis_slot: Slot,
-    genesis_duration: Duration,
-    slot_duration: Duration,
+    clock: ManualSlotClock,
 }
 
 impl SlotClock for SystemTimeSlotClock {
     fn new(genesis_slot: Slot, genesis_duration: Duration, slot_duration: Duration) -> Self {
-        if slot_duration.as_millis() == 0 {
-            panic!("SystemTimeSlotClock cannot have a < 1ms slot duration.");
-        }
-
         Self {
-            genesis_slot,
-            genesis_duration,
-            slot_duration,
+            clock: ManualSlotClock::new(genesis_slot, genesis_duration, slot_duration),
         }
     }
 
     fn now(&self) -> Option<Slot> {
         let now = SystemTime::now().duration_since(UNIX_EPOCH).ok()?;
-        let genesis = self.genesis_duration;
+        self.clock.slot_of(now)
+    }
 
-        if now >= genesis {
-            let since_genesis = now
-                .checked_sub(genesis)
-                .expect("Control flow ensures now is greater than or equal to genesis");
-            let slot =
-                Slot::from((since_genesis.as_millis() / self.slot_duration.as_millis()) as u64);
-            Some(slot + self.genesis_slot)
-        } else {
-            None
-        }
+    fn now_duration(&self) -> Option<Duration> {
+        SystemTime::now().duration_since(UNIX_EPOCH).ok()
+    }
+
+    fn slot_of(&self, now: Duration) -> Option<Slot> {
+        self.clock.slot_of(now)
     }
 
     fn duration_to_next_slot(&self) -> Option<Duration> {
         let now = SystemTime::now().duration_since(UNIX_EPOCH).ok()?;
-        let genesis = self.genesis_duration;
-
-        let slot_start = |slot: Slot| -> Duration {
-            let slot = slot.as_u64() as u32;
-            genesis + slot * self.slot_duration
-        };
-
-        if now >= genesis {
-            Some(
-                slot_start(self.now()? + 1)
-                    .checked_sub(now)
-                    .expect("The next slot cannot start before now"),
-            )
-        } else {
-            Some(
-                genesis
-                    .checked_sub(now)
-                    .expect("Control flow ensures genesis is greater than or equal to now"),
-            )
-        }
+        self.clock.duration_to_next_slot_from(now)
     }
 
     fn duration_to_next_epoch(&self, slots_per_epoch: u64) -> Option<Duration> {
         let now = SystemTime::now().duration_since(UNIX_EPOCH).ok()?;
-        let genesis = self.genesis_duration;
-
-        let slot_start = |slot: Slot| -> Duration {
-            let slot = slot.as_u64() as u32;
-            genesis + slot * self.slot_duration
-        };
-
-        let epoch_start_slot = self
-            .now()
-            .map(|slot| slot.epoch(slots_per_epoch))
-            .map(|epoch| (epoch + 1).start_slot(slots_per_epoch))?;
-
-        if now >= genesis {
-            Some(
-                slot_start(epoch_start_slot)
-                    .checked_sub(now)
-                    .expect("The next epoch cannot start before now"),
-            )
-        } else {
-            Some(
-                genesis
-                    .checked_sub(now)
-                    .expect("Control flow ensures genesis is greater than or equal to now"),
-            )
-        }
+        self.clock.duration_to_next_epoch_from(now, slots_per_epoch)
     }
 
     fn slot_duration(&self) -> Duration {
-        self.slot_duration
+        self.clock.slot_duration()
     }
 }
 

eth2/utils/slot_clock/src/testing_slot_clock.rs

@@ -1,64 +0,0 @@
-use super::SlotClock;
-use std::sync::RwLock;
-use std::time::Duration;
-use types::Slot;
-
-/// A slot clock where the slot is manually set instead of being determined by the system time.
-///
-/// Useful for testing scenarios.
-pub struct TestingSlotClock {
-    slot: RwLock<Slot>,
-}
-
-impl TestingSlotClock {
-    pub fn set_slot(&self, slot: u64) {
-        *self.slot.write().expect("TestingSlotClock poisoned.") = Slot::from(slot);
-    }
-
-    pub fn advance_slot(&self) {
-        self.set_slot(self.now().unwrap().as_u64() + 1)
-    }
-}
-
-impl SlotClock for TestingSlotClock {
-    fn new(genesis_slot: Slot, _genesis_duration: Duration, _slot_duration: Duration) -> Self {
-        TestingSlotClock {
-            slot: RwLock::new(genesis_slot),
-        }
-    }
-
-    fn now(&self) -> Option<Slot> {
-        let slot = *self.slot.read().expect("TestingSlotClock poisoned.");
-        Some(slot)
-    }
-
-    /// Always returns a duration of 1 second.
-    fn duration_to_next_slot(&self) -> Option<Duration> {
-        Some(Duration::from_secs(1))
-    }
-
-    /// Always returns a duration of `1 * slots_per_epoch` second.
-    fn duration_to_next_epoch(&self, slots_per_epoch: u64) -> Option<Duration> {
-        Some(Duration::from_secs(slots_per_epoch))
-    }
-
-    /// Always returns a slot duration of 0 seconds.
-    fn slot_duration(&self) -> Duration {
-        Duration::from_secs(0)
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn test_slot_now() {
-        let null = Duration::from_secs(0);
-
-        let clock = TestingSlotClock::new(Slot::new(10), null, null);
-        assert_eq!(clock.now(), Some(Slot::new(10)));
-        clock.set_slot(123);
-        assert_eq!(clock.now(), Some(Slot::new(123)));
-    }
-}