lighthouse/beacon_node/network/src
Paul Hauner 1ef4f0ea12 Add gossip conditions from spec v0.12.3 (#1667)
## Issue Addressed

NA

## Proposed Changes

There are four new conditions introduced in v0.12.3:

 1. _[REJECT]_ The attestation's epoch matches its target -- i.e. `attestation.data.target.epoch ==
  compute_epoch_at_slot(attestation.data.slot)`
1. _[REJECT]_ The attestation's target block is an ancestor of the block named in the LMD vote -- i.e.
  `get_ancestor(store, attestation.data.beacon_block_root, compute_start_slot_at_epoch(attestation.data.target.epoch)) == attestation.data.target.root`
1. _[REJECT]_ The committee index is within the expected range -- i.e. `data.index < get_committee_count_per_slot(state, data.target.epoch)`.
1. _[REJECT]_ The number of aggregation bits matches the committee size -- i.e.
  `len(attestation.aggregation_bits) == len(get_beacon_committee(state, data.slot, data.index))`.

This PR implements new logic to suit (1) and (2). Tests are added for (3) and (4), although they were already implicitly enforced.

## Additional Info

- There's a bit of edge-case with target root verification that I raised here: https://github.com/ethereum/eth2.0-specs/pull/2001#issuecomment-699246659
- I've had to add an `--ignore` to `cargo audit` to get CI to pass. See https://github.com/sigp/lighthouse/issues/1669
2020-09-27 20:59:40 +00:00
..
attestation_service Subscribe to subnets an epoch in advance (#1600) 2020-09-22 07:29:34 +00:00
beacon_processor Add gossip conditions from spec v0.12.3 (#1667) 2020-09-27 20:59:40 +00:00
router Super Silky Smooth Syncs, like a Sir (#1628) 2020-09-23 06:29:55 +00:00
service Alternative (to BeaconChainHarness) BeaconChain testing API (#1380) 2020-08-26 09:24:55 +00:00
sync Super Silky Smooth Syncs, like a Sir (#1628) 2020-09-23 06:29:55 +00:00
error.rs Initial work towards v0.2.0 (#924) 2020-03-17 17:24:44 +11:00
lib.rs Process gossip blocks on the GossipProcessor (#1523) 2020-08-17 09:20:27 +00:00
metrics.rs Add gossip conditions from spec v0.12.3 (#1667) 2020-09-27 20:59:40 +00:00
persisted_dht.rs Fix clippy warnings (#1385) 2020-07-23 14:18:00 +00:00
service.rs Subscribe to core topics after sync (#1613) 2020-09-23 03:26:33 +00:00