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Optimise attester slashing processing.

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This commit is contained in:
Paul Hauner
2019-03-10 08:55:45 +11:00
parent e7fba3a473
commit 3f98849362
3 changed files with 43 additions and 9 deletions
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32
eth2/state_processing/src/per_block_processing.rs
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@@ -13,6 +13,7 @@ pub use verify_deposit::{
build_public_key_hashmap, get_existing_validator_index, verify_deposit, verify_deposit_index,
};
pub use verify_exit::verify_exit;
pub use verify_slashable_attestation::verify_slashable_attestation;
pub use verify_transfer::{execute_transfer, verify_transfer};
pub mod errors;
@@ -264,19 +265,40 @@ pub fn process_attester_slashings(
Invalid::MaxAttesterSlashingsExceed
);
// Verify attester slashings in parallel.
attester_slashings
// Verify the `SlashableAttestation`s in parallel (these are the resource-consuming objects, not
// the `AttesterSlashing`s themselves).
let mut slashable_attestations: Vec<&SlashableAttestation> =
Vec::with_capacity(attester_slashings.len() * 2);
for attester_slashing in attester_slashings {
slashable_attestations.push(&attester_slashing.slashable_attestation_1);
slashable_attestations.push(&attester_slashing.slashable_attestation_2);
}
// Verify slashable attestations in parallel.
slashable_attestations
.par_iter()
.enumerate()
.try_for_each(|(i, attester_slashing)| {
verify_attester_slashing(&state, &attester_slashing, spec)
.try_for_each(|(i, slashable_attestation)| {
verify_slashable_attestation(&state, slashable_attestation, spec)
.map_err(|e| e.into_with_index(i))
})?;
let all_slashable_attestations_have_been_checked = true;
// Gather the slashable indices and update the state in series.
// Gather the slashable indices and preform the final verification and update the state in series.
for (i, attester_slashing) in attester_slashings.iter().enumerate() {
let should_verify_slashable_attestations = !all_slashable_attestations_have_been_checked;
verify_attester_slashing(
&state,
&attester_slashing,
should_verify_slashable_attestations,
spec,
)
.map_err(|e| e.into_with_index(i))?;
let slashable_indices = gather_attester_slashing_indices(&state, &attester_slashing)
.map_err(|e| e.into_with_index(i))?;
for i in slashable_indices {
state.slash_validator(i as usize, spec)?;
}