Initial: Offchain Workers (#1942)

* Refactor state-machine stuff.

* Fix tests.

* WiP

* WiP2

* Service support for offchain workers.

* Service support for offchain workers.

* Testing offchain worker.

* Initial version working.

* Pass side effects in call.

* Pass OffchainExt in context.

* Submit extrinsics to the pool.

* Support inherents.

* Insert to inherents pool.

* Inserting to the pool asynchronously.

* Add test to offchain worker.

* Implement convenience syntax for modules.

* Dispatching offchain worker through executive.

* Fix offchain test.

* Remove offchain worker from timestamp.

* Update Cargo.lock.

* Address review comments.

* Use latest patch version for futures.

* Add CLI parameter for offchain worker.

* Fix compilation.

* Fix test.

* Fix extrinsics format for tests.

* Fix RPC test.

* Bump spec version.

* Fix executive.

* Fix support macro.

* Address grumbles.

* Bump runtime

substrate/node/runtime/Cargo.toml

@@ -12,6 +12,7 @@ substrate-primitives = { path = "../../core/primitives", default-features = fals
 client = { package = "substrate-client", path = "../../core/client", default-features = false }
 rstd = { package = "sr-std", path = "../../core/sr-std", default-features = false }
 runtime_primitives = { package = "sr-primitives", path = "../../core/sr-primitives", default-features = false }
+offchain-primitives = { package = "substrate-offchain-primitives", path = "../../core/offchain/primitives", default-features = false }
 version = { package = "sr-version", path = "../../core/sr-version", default-features = false }
 support = { package = "srml-support", path = "../../srml/support", default-features = false }
 aura = { package = "srml-aura", path = "../../srml/aura", default-features = false }

substrate/node/runtime/src/lib.rs

@@ -58,8 +58,8 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	spec_name: create_runtime_str!("node"),
 	impl_name: create_runtime_str!("substrate-node"),
 	authoring_version: 10,
-	spec_version: 42,
-	impl_version: 42,
+	spec_version: 43,
+	impl_version: 43,
 	apis: RUNTIME_API_VERSIONS,
 };
 
@@ -288,6 +288,12 @@ impl_runtime_apis! {
 		}
 	}
 
+	impl offchain_primitives::OffchainWorkerApi<Block> for Runtime {
+		fn offchain_worker(number: NumberFor<Block>) {
+			Executive::offchain_worker(number)
+		}
+	}
+
 	impl fg_primitives::GrandpaApi<Block> for Runtime {
 		fn grandpa_pending_change(digest: &DigestFor<Block>)
 			-> Option<ScheduledChange<NumberFor<Block>>>

substrate/node/runtime/wasm/Cargo.lock

@@ -1297,6 +1297,7 @@ dependencies = [
  "substrate-client 0.1.0",
  "substrate-consensus-aura-primitives 0.1.0",
  "substrate-keyring 0.1.0",
+ "substrate-offchain-primitives 0.1.0",
  "substrate-primitives 0.1.0",
 ]
 
@@ -2666,6 +2667,14 @@ dependencies = [
  "substrate-primitives 0.1.0",
 ]
 
+[[package]]
+name = "substrate-offchain-primitives"
+version = "0.1.0"
+dependencies = [
+ "sr-primitives 0.1.0",
+ "substrate-client 0.1.0",
+]
+
 [[package]]
 name = "substrate-panic-handler"
 version = "0.1.0"