spec: update tags to v0.5.1

eth2/state_processing/src/common/exit_validator.rs

@@ -2,7 +2,7 @@ use types::{BeaconStateError as Error, *};
 
 /// Exit the validator of the given `index`.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn exit_validator(
     state: &mut BeaconState,
     validator_index: usize,

eth2/state_processing/src/common/slash_validator.rs

@@ -3,7 +3,7 @@ use types::{BeaconStateError as Error, *};
 
 /// Slash the validator with index ``index``.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn slash_validator(
     state: &mut BeaconState,
     validator_index: usize,

eth2/state_processing/src/common/verify_bitfield.rs

@@ -4,7 +4,7 @@ use types::*;
 ///
 /// Is title `verify_bitfield` in spec.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn verify_bitfield_length(bitfield: &Bitfield, committee_size: usize) -> bool {
     if bitfield.num_bytes() != ((committee_size + 7) / 8) {
         return false;

eth2/state_processing/src/get_genesis_state.rs

@@ -9,7 +9,7 @@ pub enum GenesisError {
 
 /// Returns the genesis `BeaconState`
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn get_genesis_state(
     genesis_validator_deposits: &[Deposit],
     genesis_time: u64,

eth2/state_processing/src/per_block_processing.rs

@@ -39,7 +39,7 @@ const VERIFY_DEPOSIT_MERKLE_PROOFS: bool = false;
 /// Returns `Ok(())` if the block is valid and the state was successfully updated. Otherwise
 /// returns an error describing why the block was invalid or how the function failed to execute.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn per_block_processing(
     state: &mut BeaconState,
     block: &BeaconBlock,
@@ -54,7 +54,7 @@ pub fn per_block_processing(
 /// Returns `Ok(())` if the block is valid and the state was successfully updated. Otherwise
 /// returns an error describing why the block was invalid or how the function failed to execute.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn per_block_processing_without_verifying_block_signature(
     state: &mut BeaconState,
     block: &BeaconBlock,
@@ -69,7 +69,7 @@ pub fn per_block_processing_without_verifying_block_signature(
 /// Returns `Ok(())` if the block is valid and the state was successfully updated. Otherwise
 /// returns an error describing why the block was invalid or how the function failed to execute.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 fn per_block_processing_signature_optional(
     mut state: &mut BeaconState,
     block: &BeaconBlock,
@@ -119,7 +119,7 @@ pub fn process_block_header(
 
 /// Verifies the signature of a block.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn verify_block_signature(
     state: &BeaconState,
     block: &BeaconBlock,
@@ -147,7 +147,7 @@ pub fn verify_block_signature(
 /// Verifies the `randao_reveal` against the block's proposer pubkey and updates
 /// `state.latest_randao_mixes`.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn process_randao(
     state: &mut BeaconState,
     block: &BeaconBlock,
@@ -178,7 +178,7 @@ pub fn process_randao(
 
 /// Update the `state.eth1_data_votes` based upon the `eth1_data` provided.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn process_eth1_data(state: &mut BeaconState, eth1_data: &Eth1Data) -> Result<(), Error> {
     // Attempt to find a `Eth1DataVote` with matching `Eth1Data`.
     let matching_eth1_vote_index = state
@@ -204,7 +204,7 @@ pub fn process_eth1_data(state: &mut BeaconState, eth1_data: &Eth1Data) -> Resul
 /// Returns `Ok(())` if the validation and state updates completed successfully, otherwise returns
 /// an `Err` describing the invalid object or cause of failure.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn process_proposer_slashings(
     state: &mut BeaconState,
     proposer_slashings: &[ProposerSlashing],
@@ -237,7 +237,7 @@ pub fn process_proposer_slashings(
 /// Returns `Ok(())` if the validation and state updates completed successfully, otherwise returns
 /// an `Err` describing the invalid object or cause of failure.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn process_attester_slashings(
     state: &mut BeaconState,
     attester_slashings: &[AttesterSlashing],
@@ -295,7 +295,7 @@ pub fn process_attester_slashings(
 /// Returns `Ok(())` if the validation and state updates completed successfully, otherwise returns
 /// an `Err` describing the invalid object or cause of failure.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn process_attestations(
     state: &mut BeaconState,
     attestations: &[Attestation],
@@ -337,7 +337,7 @@ pub fn process_attestations(
 /// Returns `Ok(())` if the validation and state updates completed successfully, otherwise returns
 /// an `Err` describing the invalid object or cause of failure.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn process_deposits(
     state: &mut BeaconState,
     deposits: &[Deposit],
@@ -407,7 +407,7 @@ pub fn process_deposits(
 /// Returns `Ok(())` if the validation and state updates completed successfully, otherwise returns
 /// an `Err` describing the invalid object or cause of failure.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn process_exits(
     state: &mut BeaconState,
     voluntary_exits: &[VoluntaryExit],
@@ -439,7 +439,7 @@ pub fn process_exits(
 /// Returns `Ok(())` if the validation and state updates completed successfully, otherwise returns
 /// an `Err` describing the invalid object or cause of failure.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn process_transfers(
     state: &mut BeaconState,
     transfers: &[Transfer],

eth2/state_processing/src/per_block_processing/validate_attestation.rs

@@ -8,7 +8,7 @@ use types::*;
 ///
 /// Returns `Ok(())` if the `Attestation` is valid, otherwise indicates the reason for invalidity.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn validate_attestation(
     state: &BeaconState,
     attestation: &Attestation,
@@ -31,7 +31,7 @@ pub fn validate_attestation_time_independent_only(
 ///
 /// Returns `Ok(())` if the `Attestation` is valid, otherwise indicates the reason for invalidity.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn validate_attestation_without_signature(
     state: &BeaconState,
     attestation: &Attestation,
@@ -44,7 +44,7 @@ pub fn validate_attestation_without_signature(
 /// given state, optionally validating the aggregate signature.
 ///
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 fn validate_attestation_parametric(
     state: &BeaconState,
     attestation: &Attestation,
@@ -167,7 +167,7 @@ fn validate_attestation_parametric(
 /// 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
+/// Spec v0.5.1
 fn verify_justified_epoch_and_root(
     attestation: &Attestation,
     state: &BeaconState,
@@ -222,7 +222,7 @@ fn verify_justified_epoch_and_root(
 ///  - `custody_bitfield` does not have a bit for each index of `committee`.
 ///  - A `validator_index` in `committee` is not in `state.validator_registry`.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 fn verify_attestation_signature(
     state: &BeaconState,
     committee: &[usize],

eth2/state_processing/src/per_block_processing/verify_attester_slashing.rs

@@ -7,7 +7,7 @@ use types::*;
 ///
 /// Returns `Ok(())` if the `AttesterSlashing` is valid, otherwise indicates the reason for invalidity.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn verify_attester_slashing(
     state: &BeaconState,
     attester_slashing: &AttesterSlashing,
@@ -41,7 +41,7 @@ pub fn verify_attester_slashing(
 ///
 /// Returns Ok(indices) if `indices.len() > 0`.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn gather_attester_slashing_indices(
     state: &BeaconState,
     attester_slashing: &AttesterSlashing,

eth2/state_processing/src/per_block_processing/verify_deposit.rs

@@ -15,7 +15,7 @@ use types::*;
 ///
 /// Note: this function is incomplete.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn verify_deposit(
     state: &BeaconState,
     deposit: &Deposit,
@@ -46,7 +46,7 @@ pub fn verify_deposit(
 
 /// Verify that the `Deposit` index is correct.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn verify_deposit_index(state: &BeaconState, deposit: &Deposit) -> Result<(), Error> {
     verify!(
         deposit.index == state.deposit_index,
@@ -88,7 +88,7 @@ pub fn get_existing_validator_index(
 
 /// Verify that a deposit is included in the state's eth1 deposit root.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 fn verify_deposit_merkle_proof(state: &BeaconState, deposit: &Deposit, spec: &ChainSpec) -> bool {
     let leaf = hash(&get_serialized_deposit_data(deposit));
     verify_merkle_proof(
@@ -102,7 +102,7 @@ fn verify_deposit_merkle_proof(state: &BeaconState, deposit: &Deposit, spec: &Ch
 
 /// Helper struct for easily getting the serialized data generated by the deposit contract.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 #[derive(Encode)]
 struct SerializedDepositData {
     amount: u64,
@@ -113,7 +113,7 @@ struct SerializedDepositData {
 /// Return the serialized data generated by the deposit contract that is used to generate the
 /// merkle proof.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 fn get_serialized_deposit_data(deposit: &Deposit) -> Vec<u8> {
     let serialized_deposit_data = SerializedDepositData {
         amount: deposit.deposit_data.amount,

eth2/state_processing/src/per_block_processing/verify_exit.rs

@@ -7,7 +7,7 @@ use types::*;
 ///
 /// Returns `Ok(())` if the `Exit` is valid, otherwise indicates the reason for invalidity.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn verify_exit(
     state: &BeaconState,
     exit: &VoluntaryExit,

eth2/state_processing/src/per_block_processing/verify_proposer_slashing.rs

@@ -7,7 +7,7 @@ use types::*;
 ///
 /// Returns `Ok(())` if the `ProposerSlashing` is valid, otherwise indicates the reason for invalidity.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn verify_proposer_slashing(
     proposer_slashing: &ProposerSlashing,
     state: &BeaconState,
@@ -67,7 +67,7 @@ pub fn verify_proposer_slashing(
 ///
 /// Returns `true` if the signature is valid.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 fn verify_header_signature(
     header: &BeaconBlockHeader,
     pubkey: &PublicKey,

eth2/state_processing/src/per_block_processing/verify_slashable_attestation.rs

@@ -10,7 +10,7 @@ use types::*;
 ///
 /// Returns `Ok(())` if the `SlashableAttestation` is valid, otherwise indicates the reason for invalidity.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn verify_slashable_attestation(
     state: &BeaconState,
     slashable_attestation: &SlashableAttestation,

eth2/state_processing/src/per_block_processing/verify_transfer.rs

@@ -10,7 +10,7 @@ use types::*;
 ///
 /// Note: this function is incomplete.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn verify_transfer(
     state: &BeaconState,
     transfer: &Transfer,
@@ -122,7 +122,7 @@ fn verify_transfer_parametric(
 ///
 /// Does not check that the transfer is valid, however checks for overflow in all actions.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn execute_transfer(
     state: &mut BeaconState,
     transfer: &Transfer,

eth2/state_processing/src/per_epoch_processing.rs

@@ -32,7 +32,7 @@ pub type WinningRootHashSet = HashMap<u64, WinningRoot>;
 /// Mutates the given `BeaconState`, returning early if an error is encountered. If an error is
 /// returned, a state might be "half-processed" and therefore in an invalid state.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn per_epoch_processing(state: &mut BeaconState, spec: &ChainSpec) -> Result<(), Error> {
     // Ensure the previous and next epoch caches are built.
     state.build_epoch_cache(RelativeEpoch::Previous, spec)?;
@@ -86,7 +86,7 @@ pub fn per_epoch_processing(state: &mut BeaconState, spec: &ChainSpec) -> Result
 
 /// Maybe resets the eth1 period.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn maybe_reset_eth1_period(state: &mut BeaconState, spec: &ChainSpec) {
     let next_epoch = state.next_epoch(spec);
     let voting_period = spec.epochs_per_eth1_voting_period;
@@ -108,7 +108,7 @@ pub fn maybe_reset_eth1_period(state: &mut BeaconState, spec: &ChainSpec) {
 /// - `justified_epoch`
 /// - `previous_justified_epoch`
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn update_justification_and_finalization(
     state: &mut BeaconState,
     total_balances: &TotalBalances,
@@ -178,7 +178,7 @@ pub fn update_justification_and_finalization(
 ///
 /// Also returns a `WinningRootHashSet` for later use during epoch processing.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn process_crosslinks(
     state: &mut BeaconState,
     spec: &ChainSpec,
@@ -221,7 +221,7 @@ pub fn process_crosslinks(
 
 /// Finish up an epoch update.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn finish_epoch_update(state: &mut BeaconState, spec: &ChainSpec) -> Result<(), Error> {
     let current_epoch = state.current_epoch(spec);
     let next_epoch = state.next_epoch(spec);

eth2/state_processing/src/per_epoch_processing/apply_rewards.rs

@@ -32,7 +32,7 @@ impl std::ops::AddAssign for Delta {
 
 /// Apply attester and proposer rewards.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn apply_rewards(
     state: &mut BeaconState,
     validator_statuses: &mut ValidatorStatuses,
@@ -79,7 +79,7 @@ pub fn apply_rewards(
 /// Applies the attestation inclusion reward to each proposer for every validator who included an
 /// attestation in the previous epoch.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 fn get_proposer_deltas(
     deltas: &mut Vec<Delta>,
     state: &mut BeaconState,
@@ -120,7 +120,7 @@ fn get_proposer_deltas(
 
 /// Apply rewards for participation in attestations during the previous epoch.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 fn get_justification_and_finalization_deltas(
     deltas: &mut Vec<Delta>,
     state: &BeaconState,
@@ -163,7 +163,7 @@ fn get_justification_and_finalization_deltas(
 
 /// Determine the delta for a single validator, if the chain is finalizing normally.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 fn compute_normal_justification_and_finalization_delta(
     validator: &ValidatorStatus,
     total_balances: &TotalBalances,
@@ -215,7 +215,7 @@ fn compute_normal_justification_and_finalization_delta(
 
 /// Determine the delta for a single delta, assuming the chain is _not_ finalizing normally.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 fn compute_inactivity_leak_delta(
     validator: &ValidatorStatus,
     base_reward: u64,
@@ -261,7 +261,7 @@ fn compute_inactivity_leak_delta(
 
 /// Calculate the deltas based upon the winning roots for attestations during the previous epoch.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 fn get_crosslink_deltas(
     deltas: &mut Vec<Delta>,
     state: &BeaconState,
@@ -295,7 +295,7 @@ fn get_crosslink_deltas(
 
 /// Returns the base reward for some validator.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 fn get_base_reward(
     state: &BeaconState,
     index: usize,
@@ -312,7 +312,7 @@ fn get_base_reward(
 
 /// Returns the inactivity penalty for some validator.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 fn get_inactivity_penalty(
     state: &BeaconState,
     index: usize,
@@ -328,7 +328,7 @@ fn get_inactivity_penalty(
 
 /// Returns the epochs since the last finalized epoch.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 fn epochs_since_finality(state: &BeaconState, spec: &ChainSpec) -> Epoch {
     state.current_epoch(spec) + 1 - state.finalized_epoch
 }

eth2/state_processing/src/per_epoch_processing/get_attestation_participants.rs

@@ -3,7 +3,7 @@ use types::*;
 
 /// Returns validator indices which participated in the attestation.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn get_attestation_participants(
     state: &BeaconState,
     attestation_data: &AttestationData,

eth2/state_processing/src/per_epoch_processing/inclusion_distance.rs

@@ -5,7 +5,7 @@ use types::*;
 /// Returns the distance between the first included attestation for some validator and this
 /// slot.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn inclusion_distance(
     state: &BeaconState,
     attestations: &[&PendingAttestation],
@@ -18,7 +18,7 @@ pub fn inclusion_distance(
 
 /// Returns the slot of the earliest included attestation for some validator.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn inclusion_slot(
     state: &BeaconState,
     attestations: &[&PendingAttestation],
@@ -31,7 +31,7 @@ pub fn inclusion_slot(
 
 /// Finds the earliest included attestation for some validator.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 fn earliest_included_attestation(
     state: &BeaconState,
     attestations: &[&PendingAttestation],

eth2/state_processing/src/per_epoch_processing/process_ejections.rs

@@ -4,7 +4,7 @@ use types::{BeaconStateError as Error, *};
 /// Iterate through the validator registry and eject active validators with balance below
 /// ``EJECTION_BALANCE``.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn process_ejections(state: &mut BeaconState, spec: &ChainSpec) -> Result<(), Error> {
     // There is an awkward double (triple?) loop here because we can't loop across the borrowed
     // active validator indices and mutate state in the one loop.

eth2/state_processing/src/per_epoch_processing/process_exit_queue.rs

@@ -2,7 +2,7 @@ use types::*;
 
 /// Process the exit queue.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn process_exit_queue(state: &mut BeaconState, spec: &ChainSpec) {
     let current_epoch = state.current_epoch(spec);
 
@@ -31,7 +31,7 @@ pub fn process_exit_queue(state: &mut BeaconState, spec: &ChainSpec) {
 
 /// Initiate an exit for the validator of the given `index`.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 fn prepare_validator_for_withdrawal(
     state: &mut BeaconState,
     validator_index: usize,

eth2/state_processing/src/per_epoch_processing/process_slashings.rs

@@ -2,7 +2,7 @@ use types::{BeaconStateError as Error, *};
 
 /// Process slashings.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn process_slashings(
     state: &mut BeaconState,
     current_total_balance: u64,

eth2/state_processing/src/per_epoch_processing/update_registry_and_shuffling_data.rs

@@ -4,7 +4,7 @@ use types::*;
 
 /// Peforms a validator registry update, if required.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn update_registry_and_shuffling_data(
     state: &mut BeaconState,
     current_total_balance: u64,
@@ -49,7 +49,7 @@ pub fn update_registry_and_shuffling_data(
 
 /// Returns `true` if the validator registry should be updated during an epoch processing.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn should_update_validator_registry(
     state: &BeaconState,
     spec: &ChainSpec,
@@ -78,7 +78,7 @@ pub fn should_update_validator_registry(
 ///
 /// Note: Utilizes the cache and will fail if the appropriate cache is not initialized.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn update_validator_registry(
     state: &mut BeaconState,
     current_total_balance: u64,
@@ -133,7 +133,7 @@ pub fn update_validator_registry(
 
 /// Activate the validator of the given ``index``.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn activate_validator(
     state: &mut BeaconState,
     validator_index: usize,

eth2/state_processing/src/per_epoch_processing/validator_statuses.rs

@@ -160,7 +160,7 @@ impl ValidatorStatuses {
     /// - Active validators
     /// - Total balances for the current and previous epochs.
     ///
-    /// Spec v0.5.0
+    /// Spec v0.5.1
     pub fn new(state: &BeaconState, spec: &ChainSpec) -> Result<Self, BeaconStateError> {
         let mut statuses = Vec::with_capacity(state.validator_registry.len());
         let mut total_balances = TotalBalances::default();
@@ -195,7 +195,7 @@ impl ValidatorStatuses {
     /// Process some attestations from the given `state` updating the `statuses` and
     /// `total_balances` fields.
     ///
-    /// Spec v0.5.0
+    /// Spec v0.5.1
     pub fn process_attestations(
         &mut self,
         state: &BeaconState,
@@ -261,7 +261,7 @@ impl ValidatorStatuses {
     /// Update the `statuses` for each validator based upon whether or not they attested to the
     /// "winning" shard block root for the previous epoch.
     ///
-    /// Spec v0.5.0
+    /// Spec v0.5.1
     pub fn process_winning_roots(
         &mut self,
         state: &BeaconState,
@@ -297,14 +297,14 @@ impl ValidatorStatuses {
 /// Returns the distance between when the attestation was created and when it was included in a
 /// block.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 fn inclusion_distance(a: &PendingAttestation) -> Slot {
     a.inclusion_slot - a.data.slot
 }
 
 /// Returns `true` if some `PendingAttestation` is from the supplied `epoch`.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 fn is_from_epoch(a: &PendingAttestation, epoch: Epoch, spec: &ChainSpec) -> bool {
     a.data.slot.epoch(spec.slots_per_epoch) == epoch
 }
@@ -312,7 +312,7 @@ fn is_from_epoch(a: &PendingAttestation, epoch: Epoch, spec: &ChainSpec) -> bool
 /// Returns `true` if a `PendingAttestation` and `BeaconState` share the same beacon block hash for
 /// the first slot of the given epoch.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 fn has_common_epoch_boundary_root(
     a: &PendingAttestation,
     state: &BeaconState,
@@ -328,7 +328,7 @@ fn has_common_epoch_boundary_root(
 /// Returns `true` if a `PendingAttestation` and `BeaconState` share the same beacon block hash for
 /// the current slot of the `PendingAttestation`.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 fn has_common_beacon_block_root(
     a: &PendingAttestation,
     state: &BeaconState,

eth2/state_processing/src/per_epoch_processing/winning_root.rs

@@ -16,7 +16,7 @@ impl WinningRoot {
     /// A winning root is "better" than another if it has a higher `total_attesting_balance`. Ties
     /// are broken by favouring the higher `crosslink_data_root` value.
     ///
-    /// Spec v0.5.0
+    /// Spec v0.5.1
     pub fn is_better_than(&self, other: &Self) -> bool {
         if self.total_attesting_balance > other.total_attesting_balance {
             true
@@ -34,7 +34,7 @@ impl WinningRoot {
 /// The `WinningRoot` object also contains additional fields that are useful in later stages of
 /// per-epoch processing.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn winning_root(
     state: &BeaconState,
     shard: u64,
@@ -89,7 +89,7 @@ pub fn winning_root(
 
 /// Returns `true` if pending attestation `a` is eligible to become a winning root.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 fn is_eligible_for_winning_root(state: &BeaconState, a: &PendingAttestation, shard: Shard) -> bool {
     if shard >= state.latest_crosslinks.len() as u64 {
         return false;
@@ -100,7 +100,7 @@ fn is_eligible_for_winning_root(state: &BeaconState, a: &PendingAttestation, sha
 
 /// Returns all indices which voted for a given crosslink. Does not contain duplicates.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 fn get_attesting_validator_indices(
     state: &BeaconState,
     shard: u64,

eth2/state_processing/src/per_slot_processing.rs

@@ -10,7 +10,7 @@ pub enum Error {
 
 /// Advances a state forward by one slot, performing per-epoch processing if required.
 ///
-/// Spec v0.5.0
+/// Spec v0.5.1
 pub fn per_slot_processing(state: &mut BeaconState, spec: &ChainSpec) -> Result<(), Error> {
     cache_state(state, spec)?;