Add first changes to syncing logic

- Adds testing framework
- Breaks out new `NetworkContext` object

beacon_node/libp2p/Cargo.toml

@@ -5,6 +5,7 @@ authors = ["Age Manning <Age@AgeManning.com>"]
 edition = "2018"
 
 [dependencies]
+beacon_chain =  { path = "../beacon_chain" }
 # SigP repository until PR is merged
 libp2p =  { git = "https://github.com/SigP/rust-libp2p", branch = "gossipsub" }
 types = { path =  "../../eth2/types" }

beacon_node/libp2p/src/rpc/methods.rs

@@ -1,3 +1,4 @@
+use beacon_chain::parking_lot::RwLockReadGuard;
 /// Available RPC methods types and ids.
 use ssz_derive::{Decode, Encode};
 use types::{BeaconBlockBody, BeaconBlockHeader, Epoch, Hash256, Slot};
@@ -60,6 +61,20 @@ pub enum RPCRequest {
     BeaconChainState(BeaconChainStateRequest),
 }
 
+impl RPCRequest {
+    pub fn method_id(&self) -> u16 {
+        let method = match self {
+            RPCRequest::Hello(_) => RPCMethod::Hello,
+            RPCRequest::Goodbye(_) => RPCMethod::Goodbye,
+            RPCRequest::BeaconBlockRoots(_) => RPCMethod::BeaconBlockRoots,
+            RPCRequest::BeaconBlockHeaders(_) => RPCMethod::BeaconBlockHeaders,
+            RPCRequest::BeaconBlockBodies(_) => RPCMethod::BeaconBlockBodies,
+            RPCRequest::BeaconChainState(_) => RPCMethod::BeaconChainState,
+        };
+        method.into()
+    }
+}
+
 #[derive(Debug, Clone)]
 pub enum RPCResponse {
     Hello(HelloMessage),
@@ -69,6 +84,19 @@ pub enum RPCResponse {
     BeaconChainState(BeaconChainStateResponse),
 }
 
+impl RPCResponse {
+    pub fn method_id(&self) -> u16 {
+        let method = match self {
+            RPCResponse::Hello(_) => RPCMethod::Hello,
+            RPCResponse::BeaconBlockRoots(_) => RPCMethod::BeaconBlockRoots,
+            RPCResponse::BeaconBlockHeaders(_) => RPCMethod::BeaconBlockHeaders,
+            RPCResponse::BeaconBlockBodies(_) => RPCMethod::BeaconBlockBodies,
+            RPCResponse::BeaconChainState(_) => RPCMethod::BeaconChainState,
+        };
+        method.into()
+    }
+}
+
 /* Request/Response data structures for RPC methods */
 
 /// The HELLO request/response handshake message.