From 48aae393431956e3fe02119570ef4e839c9a37c4 Mon Sep 17 00:00:00 2001
From: Arkadiy Paronyan <arkady.paronyan@gmail.com>
Date: Tue, 10 Jul 2018 09:49:42 +0200
Subject: [PATCH] Poc-1 backwards compatibility (#291)

---
 substrate/polkadot/network/src/lib.rs       |  3 +--
 substrate/polkadot/network/src/tests.rs     |  3 +++
 substrate/substrate/network/src/message.rs  | 13 +++++++++++--
 substrate/substrate/network/src/protocol.rs |  6 +++++-
 4 files changed, 20 insertions(+), 5 deletions(-)

diff --git a/substrate/polkadot/network/src/lib.rs b/substrate/polkadot/network/src/lib.rs
index 91c53338e6..eef8c8192e 100644
--- a/substrate/polkadot/network/src/lib.rs
+++ b/substrate/polkadot/network/src/lib.rs
@@ -393,8 +393,7 @@ impl Specialization<Block> for PolkadotProtocol {
 		let local_status = match Status::decode(&mut &status.chain_status[..]) {
 			Some(status) => status,
 			None => {
-				ctx.disable_peer(peer_id);
-				return;
+				Status { collating_for: None }
 			}
 		};
 
diff --git a/substrate/polkadot/network/src/tests.rs b/substrate/polkadot/network/src/tests.rs
index 5c5dcf508e..19db9890cc 100644
--- a/substrate/polkadot/network/src/tests.rs
+++ b/substrate/polkadot/network/src/tests.rs
@@ -78,6 +78,9 @@ fn make_status(status: &Status, roles: Vec<Role>) -> FullStatus {
 		best_hash: Default::default(),
 		genesis_hash: Default::default(),
 		chain_status: status.encode(),
+		parachain_id: None,
+		validator_id: None,
+		validator_signature: None,
 	}
 }
 
diff --git a/substrate/substrate/network/src/message.rs b/substrate/substrate/network/src/message.rs
index a6992ff8e4..5063e7e54c 100644
--- a/substrate/substrate/network/src/message.rs
+++ b/substrate/substrate/network/src/message.rs
@@ -95,6 +95,8 @@ pub enum Role {
 	Light,
 	/// Parachain validator.
 	Authority,
+	/// Same as `Authority`
+	Validator,
 }
 
 impl Role {
@@ -105,7 +107,7 @@ impl Role {
 			match *r {
 				Role::Full => flags = flags | RoleFlags::FULL,
 				Role::Light => flags = flags | RoleFlags::LIGHT,
-				Role::Authority => flags = flags | RoleFlags::AUTHORITY,
+				Role::Authority | Role::Validator => flags = flags | RoleFlags::AUTHORITY,
 			}
 		}
 		flags
@@ -122,7 +124,7 @@ impl From<RoleFlags> for Vec<Role> where {
 			roles.push(Role::Light);
 		}
 		if !(flags & RoleFlags::AUTHORITY).is_empty() {
-			roles.push(Role::Authority);
+			roles.push(Role::Validator);
 		}
 		roles
 	}
@@ -371,7 +373,14 @@ pub mod generic {
 		/// Genesis block hash.
 		pub genesis_hash: Hash,
 		/// Chain-specific status.
+		#[serde(skip)]
 		pub chain_status: Vec<u8>,
+		/// Signatue of `best_hash` made with validator address. Required for the validator role.
+		pub validator_signature: Option<ed25519::Signature>,
+		/// Validator address. Required for the validator role.
+		pub validator_id: Option<AuthorityId>,
+		/// Parachain id. Required for the collator role.
+		pub parachain_id: Option<u64>,
 	}
 
 	/// Request block data from a peer.
diff --git a/substrate/substrate/network/src/protocol.rs b/substrate/substrate/network/src/protocol.rs
index e77ad6307e..4a897c9b44 100644
--- a/substrate/substrate/network/src/protocol.rs
+++ b/substrate/substrate/network/src/protocol.rs
@@ -38,7 +38,7 @@ use error;
 const REQUEST_TIMEOUT_SEC: u64 = 40;
 
 /// Current protocol version.
-pub (crate) const CURRENT_VERSION: u32 = 1;
+pub (crate) const CURRENT_VERSION: u32 = 0;
 /// Current packet count.
 pub (crate) const CURRENT_PACKET_COUNT: u8 = 1;
 
@@ -526,6 +526,10 @@ impl<B: BlockT, S: Specialization<B>> Protocol<B, S> where B::Header: HeaderT<Nu
 				best_number: info.chain.best_number,
 				best_hash: info.chain.best_hash,
 				chain_status: self.specialization.read().status(),
+
+				parachain_id: None,
+				validator_id: None,
+				validator_signature: None,
 			};
 			self.send_message(io, peer_id, GenericMessage::Status(status))
 		}