Update libp2p (#559)

substrate/substrate/network-libp2p/Cargo.toml

@@ -22,7 +22,7 @@ rand = "0.5.0"
 tokio = "0.1"
 tokio-io = "0.1"
 tokio-timer = "0.2"
-varint = { git = "https://github.com/tomaka/libp2p-rs", branch = "polkadot-2" }
+unsigned-varint = { version = "0.1", features = ["codec"] }
 
 [dev-dependencies]
 assert_matches = "1.2"

substrate/substrate/network-libp2p/src/custom_proto.rs

@@ -23,7 +23,7 @@ use std::vec::IntoIter as VecIntoIter;
 use futures::{future, Future, stream, Stream, Sink};
 use futures::sync::mpsc;
 use tokio_io::{AsyncRead, AsyncWrite};
-use varint::VarintCodec;
+use unsigned_varint::codec::UviBytes;
 
 /// Connection upgrade for a single protocol.
 ///
@@ -157,7 +157,7 @@ where C: AsyncRead + AsyncWrite + 'static,		// TODO: 'static :-/
 		}
 
 		let (sink, stream) = {
-			let framed = AsyncRead::framed(socket, VarintCodec::default());
+			let framed = AsyncRead::framed(socket, UviBytes::default());
 			let msg_rx = msg_rx.map(Message::SendReq)
 				.map_err(|()| unreachable!("mpsc::UnboundedReceiver never errors"));
 			let (sink, stream) = framed.split();

substrate/substrate/network-libp2p/src/lib.rs

@@ -28,7 +28,7 @@ extern crate libc;
 extern crate libp2p;
 extern crate rand;
 extern crate bytes;
-extern crate varint;
+extern crate unsigned_varint;
 
 extern crate ethcore_io as io;
 extern crate ethereum_types;