[Temp Commit] Implements more basic skeleton code.

beacon_node/sync/src/lib.rs

@@ -1,68 +1,10 @@
-// /// Syncing for lighthouse.
+/// Syncing for lighthouse.
+///
+/// Stores the various syncing methods for the beacon chain.
+mod simple_sync;
 
-/*
-// for initial testing and setup, to be replaced.
-pub fn sync_server(config: Config) {
-    // Set up database
-    let db = match config.db_type {
-        _ => Arc::new(MemoryDB::open()),
-        //TODO: Box db
-        //DBType::Memory => Arc::new(Box::new(MemoryDB::open())),
-        //DBType::RocksDB => Arc::new(Box::new(DiskDB::open(&config.db_name, None))),
-    };
+pub use crate::SimpleSync;
 
-    // build block
-    let block_store = Arc::new(BeaconBlockStore::new(db.clone()));
-    let state_store = Arc::new(BeaconStateStore::new(db.clone()));
-
-    // Slot clock
-    let genesis_time = 1_549_935_547; // 12th Feb 2018 (arbitrary value in the past).
-    let slot_clock = SystemTimeSlotClock::new(genesis_time, spec.slot_duration)
-        .expect("Unable to load SystemTimeSlotClock");
-    // Choose the fork choice
-    let fork_choice = BitwiseLMDGhost::new(block_store.clone(), state_store.clone());
-
-    /*
-     * Generate some random data to start a chain with.
-     *
-     * This is will need to be replace for production usage.
-     */
-let latest_eth1_data = Eth1Data {
-deposit_root: Hash256::zero(),
-block_hash: Hash256::zero(),
-};
-let keypairs: Vec<Keypair> = (0..10)
-.collect::<Vec<usize>>()
-.iter()
-.map(|_| Keypair::random())
-.collect();
-let initial_validator_deposits = keypairs
-.iter()
-.map(|keypair| Deposit {
-branch: vec![], // branch verification is not specified.
-index: 0,       // index verification is not specified.
-deposit_data: DepositData {
-amount: 32_000_000_000, // 32 ETH (in Gwei)
-timestamp: genesis_time - 1,
-deposit_input: DepositInput {
-pubkey: keypair.pk.clone(),
-withdrawal_credentials: Hash256::zero(), // Withdrawal not possible.
-proof_of_possession: create_proof_of_possession(&keypair),
-},
-},
-})
-.collect();
-
-// Genesis chain
-let _chain_result = BeaconChain::genesis(
-state_store.clone(),
-block_store.clone(),
-slot_clock,
-genesis_time,
-latest_eth1_data,
-initial_validator_deposits,
-spec,
-fork_choice,
-);
+pub enum SyncMethod {
+    SimpleSync,
 }
-*/

beacon_node/sync/src/simple_syncer.rs

@@ -0,0 +1,22 @@
+use std::collections::HashMap;
+use types::{Slot, H256};
+
+/// Keeps track of syncing information for known connected peers.
+pub struct PeerSyncInfo {
+    best_slot: Slot,
+    best_slot_hash: H256,
+}
+
+/// The current syncing state.
+pub enum SyncState {
+    Idle,
+    Downloading,
+    Stopped,
+}
+
+/// Simple Syncing protocol.
+pub struct SimpleSync {
+    genesis_hash: H256,
+    known_peers: HashMap<PeerId, PeerSyncInfo>,
+    state: SyncState,
+}