[Temp Commit] Implements more basic skeleton code.

beacon_node/beacon_chain/src/initialize.rs

@@ -0,0 +1,56 @@
+// Initialisation functions to generate a new BeaconChain.
+
+pub fn initialise_test_chain(
+    config: &ClientConfig,
+) -> Arc<BeaconChain<MemoryDB, SystemTimeSlotClock, BitwiseLMDGhost>> {
+    let spec = config.spec;
+    // 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
+    Arc::new(BeaconChain::genesis(
+        state_store.clone(),
+        block_store.clone(),
+        slot_clock,
+        genesis_time,
+        latest_eth1_data,
+        initial_validator_deposits,
+        spec,
+        fork_choice,
+    ));
+}