diff --git a/beacon_node/client/src/client_config.rs b/beacon_node/client/src/client_config.rs
index 74115c547..93ff5f7eb 100644
--- a/beacon_node/client/src/client_config.rs
+++ b/beacon_node/client/src/client_config.rs
@@ -23,19 +23,6 @@ pub struct ClientConfig {
 
 impl Default for ClientConfig {
     fn default() -> Self {
-        let data_dir = {
-            let home = dirs::home_dir().expect("Unable to determine home dir.");
-            home.join(".lighthouse/")
-        };
-        fs::create_dir_all(&data_dir)
-            .unwrap_or_else(|_| panic!("Unable to create {:?}", &data_dir));
-
-        // currently lighthouse spec
-        let default_spec = ChainSpec::lighthouse_testnet();
-        let chain_type = ChainType::from(default_spec.chain_id);
-        // builds a chain-specific network config
-        let net_conf = NetworkConfig::from(chain_type);
-
         Self {
             data_dir: PathBuf::from(".lighthouse"),
             db_type: "disk".to_string(),
@@ -50,13 +37,19 @@ impl Default for ClientConfig {
 }
 
 impl ClientConfig {
-<<<<<<< HEAD
     /// Returns the path to which the client may initialize an on-disk database.
     pub fn db_path(&self) -> Option<PathBuf> {
         self.data_dir()
             .and_then(|path| Some(path.join(&self.db_name)))
     }
 
+    /// Returns the core path for the client.
+    pub fn data_dir(&self) -> Option<PathBuf> {
+        let path = dirs::home_dir()?.join(&self.data_dir);
+        fs::create_dir_all(&path).ok()?;
+        Some(path)
+    }
+
     /// Apply the following arguments to `self`, replacing values if they are specified in `args`.
     ///
     /// Returns an error if arguments are obviously invalid. May succeed even if some values are
@@ -74,6 +67,6 @@ impl ClientConfig {
         self.rpc.apply_cli_args(args)?;
         self.http.apply_cli_args(args)?;
 
-        Ok(log)
+        Ok(())
     }
 }
diff --git a/beacon_node/eth2-libp2p/Cargo.toml b/beacon_node/eth2-libp2p/Cargo.toml
index 2deeaf5f0..b6c62255b 100644
--- a/beacon_node/eth2-libp2p/Cargo.toml
+++ b/beacon_node/eth2-libp2p/Cargo.toml
@@ -7,15 +7,14 @@ edition = "2018"
 [dependencies]
 beacon_chain =  { path = "../beacon_chain" }
 clap = "2.32.0"
-# SigP repository until PR is merged
-#libp2p =  { git = "https://github.com/SigP/rust-libp2p", rev = "fb852bcc2b9b3935555cc93930e913cbec2b0688" }
-libp2p =  { path = "../../../sharding/rust-libp2p" }
+# SigP repository 
+libp2p =  { git = "https://github.com/SigP/rust-libp2p", rev = "8d5e5bbbe32d07ad271d6a2e15fde0347894061a" }
 types = { path =  "../../eth2/types" }
 serde = "1.0"
 serde_derive = "1.0"
 ssz = { path = "../../eth2/utils/ssz" }
 ssz_derive = { path = "../../eth2/utils/ssz_derive" }
-slog = { version = "^2.2.3" , features = ["max_level_trace", "release_max_level_trace"] }
+slog = { version = "2.4.1" , features = ["max_level_trace", "release_max_level_trace"] }
 version = { path = "../version" }
 tokio = "0.1.16"
 futures = "0.1.25"
diff --git a/beacon_node/eth2-libp2p/src/behaviour.rs b/beacon_node/eth2-libp2p/src/behaviour.rs
index 58f603276..ed466bb75 100644
--- a/beacon_node/eth2-libp2p/src/behaviour.rs
+++ b/beacon_node/eth2-libp2p/src/behaviour.rs
@@ -147,11 +147,7 @@ impl<TSubstream: AsyncRead + AsyncWrite> Behaviour<TSubstream> {
     pub fn new(local_public_key: PublicKey, net_conf: &NetworkConfig, log: &slog::Logger) -> Self {
         let local_peer_id = local_public_key.clone().into_peer_id();
         let behaviour_log = log.new(o!());
-
-        // identify configuration
         let identify_config = net_conf.identify_config.clone();
-
-        // ping configuration
         let ping_config = PingConfig::new()
             .with_timeout(Duration::from_secs(30))
             .with_interval(Duration::from_secs(20))
diff --git a/beacon_node/network/src/sync/simple_sync.rs b/beacon_node/network/src/sync/simple_sync.rs
index ff08b26d1..67bf97948 100644
--- a/beacon_node/network/src/sync/simple_sync.rs
+++ b/beacon_node/network/src/sync/simple_sync.rs
@@ -522,30 +522,15 @@ impl<T: BeaconChainTypes> SimpleSync<T> {
                 BlockProcessingOutcome::ParentUnknown { .. } => {
                     self.import_queue
                         .enqueue_full_blocks(vec![block], peer_id.clone());
-        trace!(
-            self.log,
-            "NewGossipBlock";
-            "peer" => format!("{:?}", peer_id),
-        );
+                    trace!(
+                        self.log,
+                        "NewGossipBlock";
+                        "peer" => format!("{:?}", peer_id),
+                    );
 
-        // Ignore any block from a finalized slot.
-        if self.slot_is_finalized(block.slot) {
-            warn!(
-                self.log, "NewGossipBlock";
-                "msg" => "new block slot is finalized.",
-                "block_slot" => block.slot,
-            );
-            return false;
-        }
+                    SHOULD_FORWARD_GOSSIP_BLOCK
+                }
 
-        let block_root = Hash256::from_slice(&block.hash_tree_root());
-
-        // Ignore any block that the chain already knows about.
-        if self.chain_has_seen_block(&block_root) {
-            println!("this happened");
-            // TODO: Age confirm that we shouldn't forward a block if we already know of it.
-            return false;
-        }
                 BlockProcessingOutcome::FutureSlot {
                     present_slot,
                     block_slot,
diff --git a/eth2/types/src/chain_spec.rs b/eth2/types/src/chain_spec.rs
index 8e4bd9c9c..d35f696b9 100644
--- a/eth2/types/src/chain_spec.rs
+++ b/eth2/types/src/chain_spec.rs
@@ -107,6 +107,7 @@ pub struct ChainSpec {
     /*
      * Network specific parameters
      */
+    pub boot_nodes: Vec<Multiaddr>,
     pub chain_id: u8,
 }
 
@@ -216,7 +217,8 @@ impl ChainSpec {
             /*
              * Network specific
              */
-            chain_id: 1, // foundation chain id
+            boot_nodes: vec![],
+            chain_id: 1, // mainnet chain id
         }
     }