Paul Hauner 48f73b21e6 Expand eth1 block cache, add more logs (#1938) ... ## Issue Addressed NA ## Proposed Changes - Caches later blocks than is required by `ETH1_FOLLOW_DISTANCE`. - Adds logging to `warn` if the eth1 cache is insufficiently primed. - Use `max_by_key` instead of `max_by` in `BeaconChain::Eth1Chain` since it's simpler. - Rename `voting_period_start_timestamp` to `voting_target_timestamp` for accuracy. ## Additional Info The reason for eating into the `ETH1_FOLLOW_DISTANCE` and caching blocks that are closer to the head is due to possibility for `SECONDS_PER_ETH1_BLOCK` to be incorrect (as is the case for the Pyrmont testnet on Goerli). If `SECONDS_PER_ETH1_BLOCK` is too short, we'll skip back too far from the head and skip over blocks that would be valid [`is_candidate_block`](https://github.com/ethereum/eth2.0-specs/blob/v1.0.0/specs/phase0/validator.md#eth1-data) blocks. This was the case on the Pyrmont testnet and resulted in Lighthouse choosing blocks that were about 30 minutes older than is ideal.		2020-11-21 00:26:15 +00:00
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src	Expand eth1 block cache, add more logs (#1938)	2020-11-21 00:26:15 +00:00
Cargo.toml	Update external deps (#1711)	2020-10-05 08:22:19 +00:00