PoV Distribution optimization

node/network/pov-distribution/Cargo.toml

@@ -6,14 +6,22 @@ edition = "2018"
 
 [dependencies]
 futures = "0.3.8"
+log = "0.4.11"
+thiserror = "1.0.21"
 tracing = "0.1.21"
 tracing-futures = "0.2.4"
+
 polkadot-primitives = { path = "../../../primitives" }
 polkadot-subsystem = { package = "polkadot-node-subsystem", path = "../../subsystem" }
 polkadot-node-subsystem-util = { path = "../../subsystem-util" }
 polkadot-node-network-protocol = { path = "../../network/protocol" }
 
 [dev-dependencies]
 assert_matches = "1.4.0"
+env_logger = "0.8.1"
+smallvec = "1.4.2"
+
 sp-core = { git = "https://github.com/paritytech/substrate", branch = "master" }
+sp-keyring = { git = "https://github.com/paritytech/substrate", branch = "master" }
+
 polkadot-node-subsystem-test-helpers = { path = "../../subsystem-test-helpers" }

node/network/pov-distribution/src/error.rs

@@ -0,0 +1,33 @@
+// Copyright 2020 Parity Technologies (UK) Ltd.
+// This file is part of Polkadot.
+
+// Polkadot is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Polkadot is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Polkadot.  If not, see <http://www.gnu.org/licenses/>.
+
+use thiserror::Error;
+
+#[derive(Debug, Error)]
+pub enum Error {
+	#[error(transparent)]
+	Subsystem(#[from] polkadot_subsystem::SubsystemError),
+	#[error(transparent)]
+	OneshotRecv(#[from] futures::channel::oneshot::Canceled),
+	#[error(transparent)]
+	Runtime(#[from] polkadot_subsystem::errors::RuntimeApiError),
+	#[error(transparent)]
+	ValidatorDiscovery(#[from] polkadot_node_subsystem_util::validator_discovery::Error),
+	#[error(transparent)]
+	Util(#[from] polkadot_node_subsystem_util::Error),
+}
+
+pub type Result<T> = std::result::Result<T, Error>;