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op-pool: validate_attestation_time_independent_only

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This commit is contained in:
Michael Sproul 2019-03-20 16:52:58 +11:00
parent 3396f2f08e
commit e512f7c0e1
No known key found for this signature in database
GPG Key ID: 77B1309D2E54E914
3 changed files with 75 additions and 46 deletions
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8
eth2/operation_pool/src/lib.rs
View File

@ -6,8 +6,9 @@ use state_processing::per_block_processing::errors::{
ProposerSlashingValidationError, TransferValidationError,
};
use state_processing::per_block_processing::{
validate_attestation, verify_deposit, verify_exit, verify_exit_time_independent_only,
verify_proposer_slashing, verify_transfer, verify_transfer_time_independent_only,
validate_attestation, validate_attestation_time_independent_only, verify_deposit, verify_exit,
verify_exit_time_independent_only, verify_proposer_slashing, verify_transfer,
verify_transfer_time_independent_only,
};
use std::collections::{btree_map::Entry, hash_map, BTreeMap, HashMap, HashSet};
use types::chain_spec::Domain;
@ -113,8 +114,7 @@ impl OperationPool {
spec: &ChainSpec,
) -> Result<(), AttestationValidationError> {
// Check that attestation signatures are valid.
// FIXME: should disable the time-dependent checks.
validate_attestation(state, &attestation, spec)?;
validate_attestation_time_independent_only(state, &attestation, spec)?;
let id = AttestationId::from_data(&attestation.data, state, spec);

5
eth2/state_processing/src/per_block_processing.rs
View File

@ -8,7 +8,10 @@ pub use self::verify_attester_slashing::{
gather_attester_slashing_indices, verify_attester_slashing,
};
pub use self::verify_proposer_slashing::verify_proposer_slashing;
pub use validate_attestation::{validate_attestation, validate_attestation_without_signature};
pub use validate_attestation::{
validate_attestation, validate_attestation_time_independent_only,
validate_attestation_without_signature,
};
pub use verify_deposit::{get_existing_validator_index, verify_deposit, verify_deposit_index};
pub use verify_exit::{verify_exit, verify_exit_time_independent_only};
pub use verify_slashable_attestation::verify_slashable_attestation;

108
eth2/state_processing/src/per_block_processing/validate_attestation.rs
View File

@ -14,7 +14,16 @@ pub fn validate_attestation(
attestation: &Attestation,
spec: &ChainSpec,
) -> Result<(), Error> {
validate_attestation_signature_optional(state, attestation, spec, true)
validate_attestation_parametric(state, attestation, spec, true, false)
}
/// Like `validate_attestation` but doesn't run checks which may become true in future states.
pub fn validate_attestation_time_independent_only(
state: &BeaconState,
attestation: &Attestation,
spec: &ChainSpec,
) -> Result<(), Error> {
validate_attestation_parametric(state, attestation, spec, true, true)
}
/// Indicates if an `Attestation` is valid to be included in a block in the current epoch of the
@ -28,7 +37,7 @@ pub fn validate_attestation_without_signature(
attestation: &Attestation,
spec: &ChainSpec,
) -> Result<(), Error> {
validate_attestation_signature_optional(state, attestation, spec, false)
validate_attestation_parametric(state, attestation, spec, false, false)
}
/// Indicates if an `Attestation` is valid to be included in a block in the current epoch of the
@ -36,15 +45,13 @@ pub fn validate_attestation_without_signature(
///
///
/// Spec v0.5.0
fn validate_attestation_signature_optional(
fn validate_attestation_parametric(
state: &BeaconState,
attestation: &Attestation,
spec: &ChainSpec,
verify_signature: bool,
time_independent_only: bool,
) -> Result<(), Error> {
let state_epoch = state.slot.epoch(spec.slots_per_epoch);
let attestation_epoch = attestation.data.slot.epoch(spec.slots_per_epoch);
// Can't submit pre-historic attestations.
verify!(
attestation.data.slot >= spec.genesis_slot,
@ -65,7 +72,8 @@ fn validate_attestation_signature_optional(
// Can't submit attestation too quickly.
verify!(
attestation.data.slot + spec.min_attestation_inclusion_delay <= state.slot,
time_independent_only
|| attestation.data.slot + spec.min_attestation_inclusion_delay <= state.slot,
Invalid::IncludedTooEarly {
state: state.slot,
delay: spec.min_attestation_inclusion_delay,
@ -74,40 +82,8 @@ fn validate_attestation_signature_optional(
);
// Verify the justified epoch and root is correct.
if attestation_epoch >= state_epoch {
verify!(
attestation.data.source_epoch == state.current_justified_epoch,
Invalid::WrongJustifiedEpoch {
state: state.current_justified_epoch,
attestation: attestation.data.source_epoch,
is_current: true,
}
);
verify!(
attestation.data.source_root == state.current_justified_root,
Invalid::WrongJustifiedRoot {
state: state.current_justified_root,
attestation: attestation.data.source_root,
is_current: true,
}
);
} else {
verify!(
attestation.data.source_epoch == state.previous_justified_epoch,
Invalid::WrongJustifiedEpoch {
state: state.previous_justified_epoch,
attestation: attestation.data.source_epoch,
is_current: false,
}
);
verify!(
attestation.data.source_root == state.previous_justified_root,
Invalid::WrongJustifiedRoot {
state: state.previous_justified_root,
attestation: attestation.data.source_root,
is_current: true,
}
);
if !time_independent_only {
verify_justified_epoch_and_root(attestation, state, spec)?;
}
// Check that the crosslink data is valid.
@ -188,6 +164,56 @@ fn validate_attestation_signature_optional(
Ok(())
}
/// Verify that the `source_epoch` and `source_root` of an `Attestation` correctly
/// match the current (or previous) justified epoch and root from the state.
///
/// Spec v0.5.0
fn verify_justified_epoch_and_root(
attestation: &Attestation,
state: &BeaconState,
spec: &ChainSpec,
) -> Result<(), Error> {
let state_epoch = state.slot.epoch(spec.slots_per_epoch);
let attestation_epoch = attestation.data.slot.epoch(spec.slots_per_epoch);
if attestation_epoch >= state_epoch {
verify!(
attestation.data.source_epoch == state.current_justified_epoch,
Invalid::WrongJustifiedEpoch {
state: state.current_justified_epoch,
attestation: attestation.data.source_epoch,
is_current: true,
}
);
verify!(
attestation.data.source_root == state.current_justified_root,
Invalid::WrongJustifiedRoot {
state: state.current_justified_root,
attestation: attestation.data.source_root,
is_current: true,
}
);
} else {
verify!(
attestation.data.source_epoch == state.previous_justified_epoch,
Invalid::WrongJustifiedEpoch {
state: state.previous_justified_epoch,
attestation: attestation.data.source_epoch,
is_current: false,
}
);
verify!(
attestation.data.source_root == state.previous_justified_root,
Invalid::WrongJustifiedRoot {
state: state.previous_justified_root,
attestation: attestation.data.source_root,
is_current: true,
}
);
}
Ok(())
}
/// Verifies an aggregate signature for some given `AttestationData`, returning `true` if the
/// `aggregate_signature` is valid.
///