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Ignore blocks that skip a large distance from their parent (#1530)

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## Proposed Changes

To mitigate the impact of minority forks on RAM and disk usage, this change rejects blocks whose parent lies more than 320 slots (10 epochs, ~1 hour) in the past. The behaviour is configurable via `lighthouse bn --max-skip-slots N`, and can be turned off entirely using `--max-skip-slots none`.

Co-authored-by: Paul Hauner <paul@paulhauner.com>
This commit is contained in:
Michael Sproul
2020-08-17 10:54:58 +00:00
parent a58aa6ee55
commit 719a69aee0
13 changed files with 131 additions and 4 deletions
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7
beacon_node/network/src/metrics.rs
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@@ -234,6 +234,10 @@ lazy_static! {
"gossip_attestation_error_invalid_state_processing",
"Count of a specific error type (see metric name)"
);
pub static ref GOSSIP_ATTESTATION_ERROR_INVALID_TOO_MANY_SKIPPED_SLOTS: Result<IntCounter> = try_create_int_counter(
"gossip_attestation_error_invalid_too_many_skipped_slots",
"Count of a specific error type (see metric name)"
);
pub static ref GOSSIP_ATTESTATION_ERROR_BEACON_CHAIN_ERROR: Result<IntCounter> = try_create_int_counter(
"gossip_attestation_error_beacon_chain_error",
"Count of a specific error type (see metric name)"
@@ -291,6 +295,9 @@ pub fn register_attestation_error(error: &AttnError) {
inc_counter(&GOSSIP_ATTESTATION_ERROR_INVALID_SUBNET_ID)
}
AttnError::Invalid(_) => inc_counter(&GOSSIP_ATTESTATION_ERROR_INVALID_STATE_PROCESSING),
AttnError::TooManySkippedSlots { .. } => {
inc_counter(&GOSSIP_ATTESTATION_ERROR_INVALID_TOO_MANY_SKIPPED_SLOTS)
}
AttnError::BeaconChainError(_) => inc_counter(&GOSSIP_ATTESTATION_ERROR_BEACON_CHAIN_ERROR),
}
}