Started putting in place the adapter between the chain and p2p modules to forward blocks and transactions. Cleaned up chain store references.

chain/src/pipe.rs

@@ -14,6 +14,8 @@
 
 //! Implementation of the chain block acceptance (or refusal) pipeline.
 
+use std::sync::{Arc, Mutex};
+
 use secp;
 use time;
 
@@ -36,9 +38,9 @@ bitflags! {
 
 /// Contextual information required to process a new block and either reject or
 /// accept it.
-pub struct BlockContext<'a> {
+pub struct BlockContext {
 	opts: Options,
-	store: &'a ChainStore,
+	store: Arc<ChainStore>,
 	head: Tip,
 	tip: Option<Tip>,
 }
@@ -59,7 +61,7 @@ pub enum Error {
 	StoreErr(types::Error),
 }
 
-pub fn process_block(b: &Block, store: &ChainStore, opts: Options) -> Result<(), Error> {
+pub fn process_block(b: &Block, store: Arc<ChainStore>, opts: Options) -> Result<(), Error> {
 	// TODO should just take a promise for a block with a full header so we don't
 	// spend resources reading the full block when its header is invalid
 

chain/src/store.rs

@@ -36,6 +36,9 @@ pub struct ChainKVStore {
 	db: grin_store::Store,
 }
 
+unsafe impl Sync for ChainKVStore {}
+unsafe impl Send for ChainKVStore {}
+
 impl ChainKVStore {
 	pub fn new(root_path: String) -> Result<ChainKVStore, Error> {
 		let db = try!(grin_store::Store::open(format!("{}/{}", root_path, STORE_SUBPATH).as_str())

chain/src/types.rs

@@ -133,7 +133,7 @@ pub enum Error {
 
 /// Trait the chain pipeline requires an implementor for in order to process
 /// blocks.
-pub trait ChainStore: Send {
+pub trait ChainStore: Send + Sync {
 	/// Get the tip that's also the head of the chain
 	fn head(&self) -> Result<Tip, Error>;
 

chain/tests/mine_simple_chain.rs

@@ -17,6 +17,7 @@ extern crate grin_chain;
 extern crate rand;
 extern crate secp256k1zkp as secp;
 
+use std::sync::Arc;
 use rand::os::OsRng;
 
 use grin_chain::types::*;
@@ -26,7 +27,6 @@ use grin_core::consensus;
 
 #[test]
 fn mine_empty_chain() {
-  let curve = secp::Secp256k1::with_caps(secp::ContextFlag::Commit);
 	let mut rng = OsRng::new().unwrap();
 	let store = grin_chain::store::ChainKVStore::new(".grin".to_string()).unwrap();
 
@@ -42,6 +42,7 @@ fn mine_empty_chain() {
   let mut prev = gen;
 	let secp = secp::Secp256k1::with_caps(secp::ContextFlag::Commit);
 	let reward_key = secp::key::SecretKey::new(&secp, &mut rng);
+  let arc_store = Arc::new(store);
 
   for n in 1..4 {
     let mut b = core::Block::new(&prev.header, vec![], reward_key).unwrap();
@@ -55,10 +56,10 @@ fn mine_empty_chain() {
     b.header.pow = proof;
     b.header.nonce = nonce;
     b.header.target = diff_target;
-    grin_chain::pipe::process_block(&b, &store, grin_chain::pipe::EASY_POW).unwrap();
+    grin_chain::pipe::process_block(&b, arc_store.clone(), grin_chain::pipe::EASY_POW).unwrap();
 
     // checking our new head
-    let head = store.head().unwrap();
+    let head = arc_store.clone().head().unwrap();
     assert_eq!(head.height, n);
     assert_eq!(head.last_block_h, b.hash());
 

grin/src/adapters.rs

@@ -0,0 +1,42 @@
+// Copyright 2016 The Grin Developers
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use std::sync::{Arc, Mutex};
+
+use chain;
+use core::core;
+use p2p::NetAdapter;
+
+pub struct NetToChainAdapter {
+	chain_store: Arc<chain::ChainStore>,
+}
+
+impl NetAdapter for NetToChainAdapter {
+	fn transaction_received(&self, tx: core::Transaction) {
+		unimplemented!();
+	}
+	fn block_received(&self, b: core::Block) {
+		// if let Err(e) = chain::process_block(&b, self.chain_store,
+		// chain::pipe::NONE) {
+		//   debug!("Block {} refused by chain: {}", b.hash(), e);
+		// }
+		unimplemented!();
+	}
+}
+
+impl NetToChainAdapter {
+	pub fn new(chain_store: Arc<chain::ChainStore>) -> NetToChainAdapter {
+		NetToChainAdapter { chain_store: chain_store }
+	}
+}

grin/src/lib.rs

@@ -35,6 +35,7 @@ extern crate grin_p2p as p2p;
 extern crate grin_store as store;
 extern crate secp256k1zkp as secp;
 
+mod adapters;
 mod miner;
 mod server;
 

grin/src/miner.rs

@@ -30,15 +30,13 @@ use secp;
 
 pub struct Miner {
 	chain_head: Arc<Mutex<chain::Tip>>,
-	chain_store: Arc<Mutex<chain::ChainStore>>,
+	chain_store: Arc<chain::ChainStore>,
 }
 
 impl Miner {
 	/// Creates a new Miner. Needs references to the chain state and its
 	/// storage.
-	pub fn new(chain_head: Arc<Mutex<chain::Tip>>,
+	pub fn new(chain_head: Arc<Mutex<chain::Tip>>, chain_store: Arc<chain::ChainStore>) -> Miner {
-	           chain_store: Arc<Mutex<chain::ChainStore>>)
-	           -> Miner {
 		Miner {
 			chain_head: chain_head,
 			chain_store: chain_store,
@@ -54,7 +52,7 @@ impl Miner {
 			let head: core::BlockHeader;
 			let mut latest_hash: Hash;
 			{
-				head = self.chain_store.lock().unwrap().head_header().unwrap();
+				head = self.chain_store.head_header().unwrap();
 				latest_hash = self.chain_head.lock().unwrap().last_block_h;
 			}
 			let b = self.build_block(&head);
@@ -86,9 +84,7 @@ impl Miner {
 			// if we found a solution, push our block out
 			if let Some(proof) = sol {
 				info!("Found valid proof of work, adding block {}.", b.hash());
-				if let Err(e) = chain::process_block(&b,
+				if let Err(e) = chain::process_block(&b, self.chain_store.clone(), chain::NONE) {
-				                                     self.chain_store.lock().unwrap().deref(),
-				                                     chain::NONE) {
 					error!("Error validating mined block: {:?}", e);
 				}
 			} else {

grin/src/server.rs

@@ -23,6 +23,7 @@ use std::thread;
 use futures::Future;
 use tokio_core::reactor;
 
+use adapters::NetToChainAdapter;
 use chain;
 use chain::ChainStore;
 use core;
@@ -72,7 +73,7 @@ pub struct Server {
 	/// the reference copy of the current chain state
 	chain_head: Arc<Mutex<chain::Tip>>,
 	/// data store access
-	chain_store: Arc<Mutex<chain::ChainStore>>,
+	chain_store: Arc<chain::ChainStore>,
 }
 
 impl Server {
@@ -82,7 +83,8 @@ impl Server {
 
 		let mut evtlp = reactor::Core::new().unwrap();
 		let handle = evtlp.handle();
-		let server = Arc::new(p2p::Server::new(config.p2p_config));
+		let net_adapter = Arc::new(NetToChainAdapter::new(chain_store.clone()));
+		let server = Arc::new(p2p::Server::new(config.p2p_config, net_adapter));
 		evtlp.run(server.start(handle.clone())).unwrap();
 
 		warn!("Grin server started.");
@@ -91,7 +93,7 @@ impl Server {
 			evt_handle: handle.clone(),
 			p2p: server,
 			chain_head: Arc::new(Mutex::new(head)),
-			chain_store: Arc::new(Mutex::new(chain_store)),
+			chain_store: chain_store,
 		})
 	}
 
@@ -121,7 +123,7 @@ pub struct ServerFut {
 	/// the reference copy of the current chain state
 	chain_head: Arc<Mutex<chain::Tip>>,
 	/// data store access
-	chain_store: Arc<Mutex<chain::ChainStore>>,
+	chain_store: Arc<chain::ChainStore>,
 }
 
 impl ServerFut {
@@ -129,7 +131,8 @@ impl ServerFut {
 	pub fn start(config: ServerConfig, evt_handle: &reactor::Handle) -> Result<Server, Error> {
 		let (chain_store, head) = try!(store_head(&config));
 
-		let server = Arc::new(p2p::Server::new(config.p2p_config));
+		let net_adapter = Arc::new(NetToChainAdapter::new(chain_store.clone()));
+		let server = Arc::new(p2p::Server::new(config.p2p_config, net_adapter));
 		evt_handle.spawn(server.start(evt_handle.clone()).map_err(|_| ()));
 
 		warn!("Grin server started.");
@@ -138,7 +141,7 @@ impl ServerFut {
 			evt_handle: evt_handle.clone(),
 			p2p: server,
 			chain_head: Arc::new(Mutex::new(head)),
-			chain_store: Arc::new(Mutex::new(chain_store)),
+			chain_store: chain_store,
 		})
 	}
 
@@ -160,7 +163,8 @@ impl ServerFut {
 
 // Helper function to create the chain storage and check if it already has a
 // genesis block
-fn store_head(config: &ServerConfig) -> Result<(chain::store::ChainKVStore, chain::Tip), Error> {
+fn store_head(config: &ServerConfig)
+              -> Result<(Arc<chain::store::ChainKVStore>, chain::Tip), Error> {
 	let chain_store = try!(chain::store::ChainKVStore::new(config.db_root.clone())
 		.map_err(&Error::StoreErr));
 
@@ -178,5 +182,5 @@ fn store_head(config: &ServerConfig) -> Result<(chain::store::ChainKVStore, chai
 		}
 		Err(e) => return Err(Error::StoreErr(e)),
 	};
-	Ok((chain_store, head))
+	Ok((Arc::new(chain_store), head))
 }

p2p/src/lib.rs

@@ -44,4 +44,4 @@ mod types;
 
 pub use server::{Server, DummyAdapter};
 pub use peer::Peer;
-pub use types::P2PConfig;
+pub use types::{P2PConfig, NetAdapter};

p2p/src/peer.rs

@@ -57,7 +57,10 @@ impl Peer {
 		Box::new(hs_peer)
 	}
 
-	pub fn run(&self, conn: TcpStream, na: Arc<NetAdapter>) -> Box<Future<Item = (), Error = Error>> {
+	pub fn run(&self,
+	           conn: TcpStream,
+	           na: Arc<NetAdapter>)
+	           -> Box<Future<Item = (), Error = Error>> {
 		self.proto.handle(conn, na)
 	}
 

p2p/src/protocol.rs

@@ -136,7 +136,9 @@ impl ProtocolV1 {
 				})
 				.and_then(move |(reader, header)| {
 					// now that we have a size, proceed with the body
-          read_exact(reader, vec![0u8; header.msg_len as usize]).map(|(reader, buf)| { (reader, header, buf) }).map_err(|e| ser::Error::IOErr(e))
+					read_exact(reader, vec![0u8; header.msg_len as usize])
+						.map(|(reader, buf)| (reader, header, buf))
+						.map_err(|e| ser::Error::IOErr(e))
 				})
 				.map(move |(reader, header, buf)| {
 					// add the count of bytes received
@@ -192,7 +194,11 @@ impl ProtocolV1 {
 	}
 }
 
-fn handle_payload(adapter: Arc<NetAdapter>, header: &MsgHeader, buf: Vec<u8>, sender: &mut UnboundedSender<Vec<u8>>) -> Result<(), ser::Error> {
+fn handle_payload(adapter: Arc<NetAdapter>,
+                  header: &MsgHeader,
+                  buf: Vec<u8>,
+                  sender: &mut UnboundedSender<Vec<u8>>)
+                  -> Result<(), ser::Error> {
 	match header.msg_type {
 		Type::Ping => {
 			let data = try!(ser::ser_vec(&MsgHeader::new(Type::Pong, 0)));

p2p/src/server.rs

@@ -45,6 +45,7 @@ impl NetAdapter for DummyAdapter {
 pub struct Server {
 	config: P2PConfig,
 	peers: Arc<RwLock<Vec<Arc<Peer>>>>,
+	adapter: Arc<NetAdapter>,
 	stop: RefCell<Option<futures::sync::oneshot::Sender<()>>>,
 }
 
@@ -54,10 +55,11 @@ unsafe impl Send for Server {}
 // TODO TLS
 impl Server {
 	/// Creates a new idle p2p server with no peers
-	pub fn new(config: P2PConfig) -> Server {
+	pub fn new(config: P2PConfig, adapter: Arc<NetAdapter>) -> Server {
 		Server {
 			config: config,
 			peers: Arc::new(RwLock::new(Vec::new())),
+			adapter: adapter,
 			stop: RefCell::new(None),
 		}
 	}
@@ -71,10 +73,12 @@ impl Server {
 
 		let hs = Arc::new(Handshake::new());
 		let peers = self.peers.clone();
+		let adapter = self.adapter.clone();
 
 		// main peer acceptance future handling handshake
 		let hp = h.clone();
 		let peers = socket.incoming().map_err(|e| Error::IOErr(e)).map(move |(conn, addr)| {
+			let adapter = adapter.clone();
 			let peers = peers.clone();
 
 			// accept the peer and add it to the server map
@@ -84,7 +88,7 @@ impl Server {
 			let timed_peer = with_timeout(Box::new(peer_accept), &hp);
 
 			// run the main peer protocol
-			timed_peer.and_then(|(conn, peer)| peer.clone().run(conn, Arc::new(DummyAdapter {})))
+			timed_peer.and_then(move |(conn, peer)| peer.clone().run(conn, adapter))
 		});
 
 		// spawn each peer future to its own task
@@ -120,6 +124,8 @@ impl Server {
 	                    h: reactor::Handle)
 	                    -> Box<Future<Item = (), Error = Error>> {
 		let peers = self.peers.clone();
+		let adapter = self.adapter.clone();
+
 		let socket = TcpStream::connect(&addr, &h).map_err(|e| Error::IOErr(e));
 		let request = socket.and_then(move |socket| {
 				let peers = peers.clone();
@@ -129,7 +135,7 @@ impl Server {
 				let peer_connect = add_to_peers(peers, Peer::connect(socket, &Handshake::new()));
 				with_timeout(Box::new(peer_connect), &h)
 			})
-			.and_then(|(socket, peer)| peer.run(socket, Arc::new(DummyAdapter {})));
+			.and_then(move |(socket, peer)| peer.run(socket, adapter));
 		Box::new(request)
 	}
 

p2p/src/types.rs

@@ -66,7 +66,10 @@ pub trait Protocol {
 	/// be  known already, usually passed during construction. Will typically
 	/// block so needs to be called withing a coroutine. Should also be called
 	/// only once.
-	fn handle(&self, conn: TcpStream, na: Arc<NetAdapter>) -> Box<Future<Item = (), Error = Error>>;
+	fn handle(&self,
+	          conn: TcpStream,
+	          na: Arc<NetAdapter>)
+	          -> Box<Future<Item = (), Error = Error>>;
 
 	/// Sends a ping message to the remote peer.
 	fn send_ping(&self) -> Result<(), Error>;

p2p/tests/peer_handshake.rs

@@ -37,7 +37,8 @@ fn peer_handshake() {
   let mut evtlp = Core::new().unwrap();
   let handle = evtlp.handle();
   let p2p_conf = p2p::P2PConfig::default();
-  let server = p2p::Server::new(p2p_conf);
+  let net_adapter = Arc::new(p2p::DummyAdapter{});
+  let server = p2p::Server::new(p2p_conf, net_adapter.clone());
   let run_server = server.start(handle.clone());
 
   let phandle = handle.clone();
@@ -51,7 +52,7 @@ fn peer_handshake() {
     socket.and_then(move |socket| {
       Peer::connect(socket, &p2p::handshake::Handshake::new())
 		}).and_then(move |(socket, peer)| {
-      rhandle.spawn(peer.run(socket, Arc::new(p2p::DummyAdapter {})).map_err(|e| {
+      rhandle.spawn(peer.run(socket, net_adapter.clone()).map_err(|e| {
         panic!("Client run failed: {}", e);
       }));
       peer.send_ping().unwrap();

store/src/lib.rs

@@ -50,6 +50,9 @@ pub struct Store {
 	rdb: RwLock<DB>,
 }
 
+unsafe impl Sync for Store {}
+unsafe impl Send for Store {}
+
 impl Store {
 	/// Opens a new RocksDB at the specified location.
 	pub fn open(path: &str) -> Result<Store, Error> {
@@ -90,8 +93,13 @@ impl Store {
 		self.get_ser_limited(key, 0)
 	}
 
-	/// Gets a `Readable` value from the db, provided its key, allowing to extract only partial data. The underlying Readable size must align accordingly. Encapsulates serialization.
+	/// Gets a `Readable` value from the db, provided its key, allowing to
-	pub fn get_ser_limited<T: ser::Readable<T>>(&self, key: &[u8], len: usize) -> Result<Option<T>, Error> {
+	/// extract only partial data. The underlying Readable size must align
+	/// accordingly. Encapsulates serialization.
+	pub fn get_ser_limited<T: ser::Readable<T>>(&self,
+	                                            key: &[u8],
+	                                            len: usize)
+	                                            -> Result<Option<T>, Error> {
 		let data = try!(self.get(key));
 		match data {
 			Some(val) => {