implement bitfield distribution subsystem

Cargo.toml

@@ -47,6 +47,7 @@ members = [
 	"node/network/bridge",
 	"node/network/pov-distribution",
 	"node/network/statement-distribution",
+	"node/network/bitfield-distribution",
 	"node/overseer",
 	"node/primitives",
 	"node/service",

node/network/bitfield-distribution/Cargo.toml

@@ -0,0 +1,28 @@
+[package]
+name = "polkadot-availability-bitfield-distribution"
+version = "0.1.0"
+authors = ["Parity Technologies <[email protected]>"]
+edition = "2018"
+
+[dependencies]
+futures = "0.3.5"
+futures-timer = "3.0.2"
+log = "0.4.8"
+streamunordered = "0.5.1"
+codec = { package="parity-scale-codec", version = "1.3.0" }
+node-primitives = { package = "polkadot-node-primitives", path = "../../primitives" }
+polkadot-primitives = { path = "../../../primitives" }
+polkadot-node-subsystem = { path = "../../subsystem" }
+polkadot-network-bridge = { path = "../../network/bridge" }
+polkadot-network = { path = "../../../network" }
+sc-network = { git = "https://github.com/paritytech/substrate", branch = "master" }
+
+[dev-dependencies]
+bitvec = { version = "0.17.4", default-features = false, features = ["alloc"] }
+sp-core = { git = "https://github.com/paritytech/substrate", branch = "master" }
+subsystem-test = { package = "polkadot-subsystem-test-helpers", path = "../../test-helpers/subsystem" }
+parking_lot = "0.10.0"
+maplit = "1.0.2"
+smol = "0.2"
+smol-timeout = "0.1"
+env_logger = "0.7"