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Ensure latest attestations are considered only.

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Age Manning 2019-02-13 10:34:56 +11:00
parent 84bf5ecd74
commit 03a5a892d0
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1 changed files with 28 additions and 3 deletions
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31
eth2/fork_choice/src/optimised_lmd_ghost.rs
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@ -234,9 +234,34 @@ impl<T: ClientDB + Sized> ForkChoice for OptimisedLMDGhost<T> {
validator_index: u64,
target_block_root: &Hash256,
) -> Result<(), ForkChoiceError> {
// simply add the attestation to the latest_attestation_target
self.latest_attestation_targets
.insert(validator_index, target_block_root.clone());
// simply add the attestation to the latest_attestation_target if the block_height is
// larger
let attestation_target = self
.latest_attestation_targets
.entry(validator_index)
.or_insert_with(|| *target_block_root);
// if we already have a value
if attestation_target != target_block_root {
// get the height of the target block
let block_height = self
.block_store
.get_reader(&target_block_root)?
.ok_or_else(|| ForkChoiceError::MissingBeaconBlock(*target_block_root))?
.slot()
- GENESIS_SLOT;
// get the height of the past target block
let past_block_height = self
.block_store
.get_reader(&attestation_target)?
.ok_or_else(|| ForkChoiceError::MissingBeaconBlock(*attestation_target))?
.slot()
- GENESIS_SLOT;
// update the attestation only if the new target is higher
if past_block_height < block_height {
*attestation_target = *target_block_root;
}
}
Ok(())
}