mirror of
https://github.com/sigp/lighthouse.git
synced 2026-03-10 20:22:02 +00:00
First compiling version of per-block-proc refactor
This commit is contained in:
Paul Hauner
268
eth2/state_processing/src/per_block_processing.rs
Normal file
268
eth2/state_processing/src/per_block_processing.rs
Normal file
@@ -0,0 +1,268 @@
|
||||
use self::verify_proposer_slashing::verify_proposer_slashing;
|
||||
use crate::errors::{BlockInvalid as Invalid, BlockProcessingError as Error, IntoWithIndex};
|
||||
use hashing::hash;
|
||||
use log::debug;
|
||||
use ssz::{ssz_encode, SignedRoot, TreeHash};
|
||||
use types::*;
|
||||
|
||||
pub use self::verify_attester_slashing::verify_attester_slashing;
|
||||
pub use validate_attestation::{validate_attestation, validate_attestation_without_signature};
|
||||
pub use verify_deposit::verify_deposit;
|
||||
pub use verify_exit::verify_exit;
|
||||
pub use verify_transfer::verify_transfer;
|
||||
|
||||
mod validate_attestation;
|
||||
mod verify_attester_slashing;
|
||||
mod verify_deposit;
|
||||
mod verify_exit;
|
||||
mod verify_proposer_slashing;
|
||||
mod verify_slashable_attestation;
|
||||
mod verify_transfer;
|
||||
|
||||
pub fn per_block_processing(
|
||||
state: &mut BeaconState,
|
||||
block: &BeaconBlock,
|
||||
spec: &ChainSpec,
|
||||
) -> Result<(), Error> {
|
||||
per_block_processing_signature_optional(state, block, true, spec)
|
||||
}
|
||||
|
||||
pub fn per_block_processing_without_verifying_block_signature(
|
||||
state: &mut BeaconState,
|
||||
block: &BeaconBlock,
|
||||
spec: &ChainSpec,
|
||||
) -> Result<(), Error> {
|
||||
per_block_processing_signature_optional(state, block, false, spec)
|
||||
}
|
||||
|
||||
fn per_block_processing_signature_optional(
|
||||
mut state: &mut BeaconState,
|
||||
block: &BeaconBlock,
|
||||
should_verify_block_signature: bool,
|
||||
spec: &ChainSpec,
|
||||
) -> Result<(), Error> {
|
||||
// Verify that `block.slot == state.slot`.
|
||||
verify!(block.slot == state.slot, Invalid::StateSlotMismatch);
|
||||
|
||||
// Get the epoch for future ergonomics.
|
||||
let epoch = block.slot.epoch(spec.slots_per_epoch);
|
||||
|
||||
// Ensure the current epoch cache is built.
|
||||
state.build_epoch_cache(RelativeEpoch::Current, spec)?;
|
||||
|
||||
// Let `proposer = state.validator_registry[get_beacon_proposer_index(state, state.slot)]`.
|
||||
let block_proposer =
|
||||
&state.validator_registry[state.get_beacon_proposer_index(block.slot, spec)?];
|
||||
|
||||
// Block signature
|
||||
if should_verify_block_signature {
|
||||
verify!(
|
||||
verify_block_signature(&block, &block_proposer, &state.fork, spec,),
|
||||
Invalid::BadSignature
|
||||
);
|
||||
}
|
||||
|
||||
// Randao
|
||||
|
||||
// Verify that `bls_verify(pubkey=proposer.pubkey,
|
||||
// message_hash=hash_tree_root(get_current_epoch(state)), signature=block.randao_reveal,
|
||||
// domain=get_domain(state.fork, get_current_epoch(state), DOMAIN_RANDAO))`.
|
||||
verify!(
|
||||
block.randao_reveal.verify(
|
||||
&state.current_epoch(spec).hash_tree_root()[..],
|
||||
spec.get_domain(epoch, Domain::Randao, &state.fork),
|
||||
&block_proposer.pubkey
|
||||
),
|
||||
Invalid::BadRandaoSignature
|
||||
);
|
||||
|
||||
// Update the state's RANDAO mix with the one revealed in the block.
|
||||
update_randao(&mut state, &block.randao_reveal, spec)?;
|
||||
|
||||
// Eth1 Data
|
||||
|
||||
// Either increment the eth1_data vote count, or add a new eth1_data.
|
||||
let matching_eth1_vote_index = state
|
||||
.eth1_data_votes
|
||||
.iter()
|
||||
.position(|vote| vote.eth1_data == block.eth1_data);
|
||||
if let Some(index) = matching_eth1_vote_index {
|
||||
state.eth1_data_votes[index].vote_count += 1;
|
||||
} else {
|
||||
state.eth1_data_votes.push(Eth1DataVote {
|
||||
eth1_data: block.eth1_data.clone(),
|
||||
vote_count: 1,
|
||||
});
|
||||
}
|
||||
|
||||
//Proposer slashings
|
||||
|
||||
verify!(
|
||||
block.body.proposer_slashings.len() as u64 <= spec.max_proposer_slashings,
|
||||
Invalid::MaxProposerSlashingsExceeded
|
||||
);
|
||||
for (i, proposer_slashing) in block.body.proposer_slashings.iter().enumerate() {
|
||||
verify_proposer_slashing(proposer_slashing, &state, spec)
|
||||
.map_err(|e| e.into_with_index(i))?;
|
||||
state.slash_validator(proposer_slashing.proposer_index as usize, spec)?;
|
||||
}
|
||||
|
||||
// Attester Slashings
|
||||
|
||||
verify!(
|
||||
block.body.attester_slashings.len() as u64 <= spec.max_attester_slashings,
|
||||
Invalid::MaxAttesterSlashingsExceed
|
||||
);
|
||||
for (i, attester_slashing) in block.body.attester_slashings.iter().enumerate() {
|
||||
let slashable_indices = verify_attester_slashing(&state, &attester_slashing, spec)
|
||||
.map_err(|e| e.into_with_index(i))?;
|
||||
for i in slashable_indices {
|
||||
state.slash_validator(i as usize, spec)?;
|
||||
}
|
||||
}
|
||||
|
||||
// Attestations
|
||||
|
||||
verify!(
|
||||
block.body.attestations.len() as u64 <= spec.max_attestations,
|
||||
Invalid::MaxAttestationsExceeded
|
||||
);
|
||||
for (i, attestation) in block.body.attestations.iter().enumerate() {
|
||||
// Build the previous epoch cache only if required by an attestation.
|
||||
if attestation.data.slot.epoch(spec.slots_per_epoch) == state.previous_epoch(spec) {
|
||||
state.build_epoch_cache(RelativeEpoch::Previous, spec)?;
|
||||
}
|
||||
|
||||
validate_attestation(&mut state, attestation, spec).map_err(|e| e.into_with_index(i))?;
|
||||
|
||||
let pending_attestation = PendingAttestation {
|
||||
data: attestation.data.clone(),
|
||||
aggregation_bitfield: attestation.aggregation_bitfield.clone(),
|
||||
custody_bitfield: attestation.custody_bitfield.clone(),
|
||||
inclusion_slot: state.slot,
|
||||
};
|
||||
state.latest_attestations.push(pending_attestation);
|
||||
}
|
||||
|
||||
// Deposits
|
||||
|
||||
verify!(
|
||||
block.body.deposits.len() as u64 <= spec.max_deposits,
|
||||
Invalid::MaxDepositsExceeded
|
||||
);
|
||||
for (i, deposit) in block.body.deposits.iter().enumerate() {
|
||||
verify_deposit(&mut state, deposit, spec).map_err(|e| e.into_with_index(i))?;
|
||||
|
||||
state
|
||||
.process_deposit(
|
||||
deposit.deposit_data.deposit_input.pubkey.clone(),
|
||||
deposit.deposit_data.amount,
|
||||
deposit
|
||||
.deposit_data
|
||||
.deposit_input
|
||||
.proof_of_possession
|
||||
.clone(),
|
||||
deposit.deposit_data.deposit_input.withdrawal_credentials,
|
||||
None,
|
||||
spec,
|
||||
)
|
||||
.map_err(|_| Error::Invalid(Invalid::DepositProcessingFailed(i)))?;
|
||||
|
||||
state.deposit_index += 1;
|
||||
}
|
||||
|
||||
// Exits
|
||||
|
||||
verify!(
|
||||
block.body.voluntary_exits.len() as u64 <= spec.max_voluntary_exits,
|
||||
Invalid::MaxExitsExceeded
|
||||
);
|
||||
for (i, exit) in block.body.voluntary_exits.iter().enumerate() {
|
||||
verify_exit(&state, exit, spec).map_err(|e| e.into_with_index(i))?;
|
||||
|
||||
state.initiate_validator_exit(exit.validator_index as usize);
|
||||
}
|
||||
|
||||
// Transfers
|
||||
verify!(
|
||||
block.body.transfers.len() as u64 <= spec.max_transfers,
|
||||
Invalid::MaxTransfersExceed
|
||||
);
|
||||
for (i, transfer) in block.body.transfers.iter().enumerate() {
|
||||
verify_transfer(&state, transfer, spec).map_err(|e| e.into_with_index(i))?;
|
||||
|
||||
let block_proposer = state.get_beacon_proposer_index(state.slot, spec)?;
|
||||
|
||||
state.validator_balances[transfer.from as usize] -= transfer.amount + transfer.fee;
|
||||
state.validator_balances[transfer.to as usize] += transfer.amount + transfer.fee;
|
||||
state.validator_balances[block_proposer as usize] += transfer.fee;
|
||||
}
|
||||
|
||||
debug!("State transition complete.");
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
/// Verifies the signature of a block.
|
||||
///
|
||||
/// Spec v0.4.0
|
||||
pub fn verify_block_signature(
|
||||
block: &BeaconBlock,
|
||||
block_proposer: &Validator,
|
||||
fork: &Fork,
|
||||
spec: &ChainSpec,
|
||||
) -> bool {
|
||||
// Let proposal = `Proposal(block.slot, BEACON_CHAIN_SHARD_NUMBER, signed_root(block,
|
||||
// "signature"), block.signature)`.
|
||||
let proposal = Proposal {
|
||||
slot: block.slot,
|
||||
shard: spec.beacon_chain_shard_number,
|
||||
block_root: Hash256::from(&block.signed_root()[..]),
|
||||
signature: block.signature.clone(),
|
||||
};
|
||||
let domain = spec.get_domain(
|
||||
block.slot.epoch(spec.slots_per_epoch),
|
||||
Domain::Proposal,
|
||||
fork,
|
||||
);
|
||||
// Verify that `bls_verify(pubkey=proposer.pubkey, message_hash=signed_root(proposal,
|
||||
// "signature"), signature=proposal.signature, domain=get_domain(state.fork,
|
||||
// get_current_epoch(state), DOMAIN_PROPOSAL))`.
|
||||
proposal
|
||||
.signature
|
||||
.verify(&proposal.signed_root()[..], domain, &block_proposer.pubkey)
|
||||
}
|
||||
|
||||
/// Updates the present randao mix.
|
||||
///
|
||||
/// Set `state.latest_randao_mixes[get_current_epoch(state) % LATEST_RANDAO_MIXES_LENGTH] =
|
||||
/// xor(get_randao_mix(state, get_current_epoch(state)), hash(block.randao_reveal))`.
|
||||
///
|
||||
/// Spec v0.4.0
|
||||
pub fn update_randao(
|
||||
state: &mut BeaconState,
|
||||
reveal: &Signature,
|
||||
spec: &ChainSpec,
|
||||
) -> Result<(), BeaconStateError> {
|
||||
let hashed_reveal = {
|
||||
let encoded_signature = ssz_encode(reveal);
|
||||
Hash256::from(&hash(&encoded_signature[..])[..])
|
||||
};
|
||||
|
||||
let current_epoch = state.slot.epoch(spec.slots_per_epoch);
|
||||
|
||||
let current_mix = state
|
||||
.get_randao_mix(current_epoch, spec)
|
||||
.ok_or_else(|| BeaconStateError::InsufficientRandaoMixes)?;
|
||||
|
||||
let new_mix = *current_mix ^ hashed_reveal;
|
||||
|
||||
let index = current_epoch.as_usize() % spec.latest_randao_mixes_length;
|
||||
|
||||
if index < state.latest_randao_mixes.len() {
|
||||
state.latest_randao_mixes[index] = new_mix;
|
||||
Ok(())
|
||||
} else {
|
||||
Err(BeaconStateError::InsufficientRandaoMixes)
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user