Update BeaconState object

Also adds the following structs:

- AttestationData
- ForkData
- PendingAttestationRecord

The `AttestationRecord` object has _not_ been updated.

beacon_chain/types/src/attestation_data.rs

@@ -0,0 +1,13 @@
+use super::Hash256;
+
+#[derive(Debug, Clone, PartialEq)]
+pub struct AttestationData {
+    pub slot: u64,
+    pub shard: u64,
+    pub beacon_block_hash: Hash256,
+    pub epoch_boundary_hash: Hash256,
+    pub shard_block_hash: Hash256,
+    pub latest_crosslink_hash: Hash256,
+    pub justified_slot: u64,
+    pub justified_block_hash: Hash256,
+}

beacon_chain/types/src/beacon_state.rs

@@ -0,0 +1,34 @@
+use super::candidate_pow_receipt_root_record::CandidatePoWReceiptRootRecord;
+use super::crosslink_record::CrosslinkRecord;
+use super::fork_data::ForkData;
+use super::pending_attestation_record::PendingAttestationRecord;
+use super::shard_and_committee::ShardAndCommittee;
+use super::shard_reassignment_record::ShardReassignmentRecord;
+use super::validator_record::ValidatorRecord;
+use super::Hash256;
+
+#[derive(Debug, PartialEq)]
+pub struct BeaconState {
+    validator_registry: Vec<ValidatorRecord>,
+    validator_registry_latest_change_slot: u64,
+    validator_registry_exit_count: u64,
+    validator_registry_delta_chain_tip: Hash256,
+    randao_mix: Hash256,
+    next_seed: Hash256,
+    shard_and_committee_for_slots: Vec<Vec<ShardAndCommittee>>,
+    persistent_committees: Vec<Vec<u32>>,
+    persistent_committee_reassignments: Vec<ShardReassignmentRecord>,
+    previous_justified_slot: u64,
+    justified_slot: u64,
+    justified_slot_bitfield: u64,
+    finalized_slot: u64,
+    latest_crosslinks: Vec<CrosslinkRecord>,
+    latest_state_recalculation_slot: u64,
+    latest_block_hashes: Vec<Hash256>,
+    latest_penalized_exit_balances: Vec<u64>,
+    latest_attestations: Vec<PendingAttestationRecord>,
+    processed_pow_receipt_root: Hash256,
+    candidate_pow_receipt_roots: Vec<CandidatePoWReceiptRootRecord>,
+    genesis_time: u64,
+    fork_data: ForkData,
+}

beacon_chain/types/src/fork_data.rs

@@ -0,0 +1,6 @@
+#[derive(Debug, Clone, PartialEq)]
+pub struct ForkData {
+    pub pre_fork_version: u64,
+    pub post_fork_version: u64,
+    pub fork_slot: u64,
+}

beacon_chain/types/src/lib.rs

@@ -4,16 +4,19 @@ extern crate ethereum_types;
 extern crate ssz;
 
 pub mod active_state;
+pub mod attestation_data;
 pub mod attestation_record;
 pub mod beacon_block;
+pub mod beacon_state;
 pub mod candidate_pow_receipt_root_record;
 pub mod chain_config;
 pub mod crosslink_record;
 pub mod crystallized_state;
+pub mod fork_data;
+pub mod pending_attestation_record;
 pub mod shard_and_committee;
 pub mod shard_reassignment_record;
 pub mod special_record;
-pub mod state;
 pub mod validator_record;
 pub mod validator_registration;
 
@@ -21,11 +24,15 @@ use self::ethereum_types::{H160, H256, U256};
 use std::collections::HashMap;
 
 pub use active_state::ActiveState;
+pub use attestation_data::AttestationData;
 pub use attestation_record::AttestationRecord;
 pub use beacon_block::BeaconBlock;
+pub use beacon_state::BeaconState;
 pub use chain_config::ChainConfig;
 pub use crosslink_record::CrosslinkRecord;
 pub use crystallized_state::CrystallizedState;
+pub use fork_data::ForkData;
+pub use pending_attestation_record::PendingAttestationRecord;
 pub use shard_and_committee::ShardAndCommittee;
 pub use special_record::{SpecialRecord, SpecialRecordKind};
 pub use validator_record::{ValidatorRecord, ValidatorStatus};

beacon_chain/types/src/pending_attestation_record.rs

@@ -0,0 +1,9 @@
+use super::{AttestationData, Bitfield};
+
+#[derive(Debug, Clone, PartialEq)]
+pub struct PendingAttestationRecord {
+    pub data: AttestationData,
+    pub participation_bitfield: Bitfield,
+    pub custody_bitfield: Bitfield,
+    pub slot_included: u64,
+}

beacon_chain/types/src/state.rs

@@ -1,54 +0,0 @@
-use super::attestation_record::AttestationRecord;
-use super::candidate_pow_receipt_root_record::CandidatePoWReceiptRootRecord;
-use super::crosslink_record::CrosslinkRecord;
-use super::shard_and_committee::ShardAndCommittee;
-use super::shard_reassignment_record::ShardReassignmentRecord;
-use super::validator_record::ValidatorRecord;
-use super::Hash256;
-
-#[derive(Debug, PartialEq)]
-pub struct BeaconState {
-    // Slot of last validator set change
-    validator_set_change_slot: u64,
-    // List of validators
-    validators: Vec<ValidatorRecord>,
-    // Most recent crosslink for each shard
-    crosslinks: Vec<CrosslinkRecord>,
-    // Last cycle-boundary state recalculation
-    last_state_recalculation_slot: u64,
-    // Last finalized slot
-    last_finalized_slot: u64,
-    // Last justified slot
-    last_justified_slot: u64,
-    // Number of consecutive justified slots
-    justified_streak: u64,
-    // Committee members and their assigned shard, per slot
-    shard_and_committee_for_slots: Vec<Vec<ShardAndCommittee>>,
-    // Persistent shard committees
-    persistent_committees: Vec<Vec<u32>>,
-    persistent_committee_reassignments: Vec<ShardReassignmentRecord>,
-    // Randao seed used for next shuffling
-    next_shuffling_seed: Hash256,
-    // Total deposits penalized in the given withdrawal period
-    deposits_penalized_in_period: Vec<u64>,
-    // Hash chain of validator set changes (for light clients to easily track deltas)
-    validator_set_delta_hash_chain: Hash256,
-    // Current sequence number for withdrawals
-    current_exit_seq: u64,
-    // Genesis time
-    genesis_time: u64,
-    // PoW receipt root
-    processed_pow_receipt_root: Hash256,
-    candidate_pow_receipt_roots: Vec<CandidatePoWReceiptRootRecord>,
-    // Parameters relevant to hard forks / versioning.
-    // Should be updated only by hard forks.
-    pre_fork_version: u64,
-    post_fork_version: u64,
-    fork_slot_number: u64,
-    // Attestations not yet processed
-    pending_attestations: Vec<AttestationRecord>,
-    // recent beacon block hashes needed to process attestations, older to newer
-    recent_block_hashes: Vec<Hash256>,
-    // RANDAO state
-    randao_mix: Hash256,
-}