light-client: Add experimental light-client support (#965)

* rpc/types: Decode `SubstrateTxStatus` for substrate and smoldot

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* lightclient: Add light client Error

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* lightclient: Add background task to manage RPC responses

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* lightclient: Implement the light client RPC in subxt

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* subxt: Expose light client under experimental feature-flag

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* artifacts: Add development chain spec for local nodes

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Update cargo lock

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* examples: Add light client example

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Update sp-* crates and smoldot to use git with branch / rev

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Apply cargo fmt

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Fix clippy

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Import hashmap entry

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* lightclient: Fetch spec only if jsonrpsee feature is enabled

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Update subxt/src/rpc/lightclient/background.rs

Co-authored-by: Niklas Adolfsson <niklasadolfsson1@gmail.com>

* Fix typo

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* artifacts: Update dev chain spec

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* types: Handle storage replies from chainHead_storage

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* artifacts: Add polkadot spec

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* lightclient: Handle RPC error responses

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* examples: Tx basic with light client for local nodes

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* example: Light client coprehensive example for live chains

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* examples: Remove prior light client example

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* feature: Rename experimental to unstable

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* book: Add light client section

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* testing: Fix clippy

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* lightclient: Ignore validated events

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Adjust tests for light-clients and normal clients

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* testing: Keep lightclient variant

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Remove support for chainHead_storage for light client

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Update light client to point to crates.io

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Update sp-crates from crates.io

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Replace Atomic with u64

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Add LightClientBuilder

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Adjust chainspec with provided bootnodes

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Add potential_relay_chains to light client builder

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Move the light-client to the background task

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Adjust tracing logs

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Update book and example

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Apply cargo fmt

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Remove dev_spec.json artifact

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Examples fix duplicate Cargo.toml

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Use tracing_subscriber crate

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Fix clippy for different features

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Add comment about bootNodes

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Add comment about tracing-sub dependency

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Run integration-tests with light-client

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Feature guard some incompatible tests

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* ci: Enable light-client tests under feature flag

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* ci: Fix git step name

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Adjust flags for testing

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Adjust warnings

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Rename feature flag jsonrpsee-ws to jsonrpsee

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Fix cargo check

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* ci: Run tests on just 2 threads

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Move light-client to subxt/src/client

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Adjust LightClientBuilder

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Use ws_url to construct light client for testing

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Refactor background

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Address feedback

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Remove polkadot.spec and trim sub_id

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Wait for substrate to produce block before connecting light client

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Adjust builder and tests

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Apply fmt

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* ci: Use release for light client testing

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Add single test for light-client

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Wait for more blocks

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Use polkadot endpoint for testing

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Adjust cargo check

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* examples: Remove light client chain connection example

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Adjust cargo.toml section for the old example

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Adjust background task to use usize for subscription Id

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Build bootnodes with serde_json::Value directly

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Make channel between subxt user and subxt background unbounded

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Update subxt/src/client/lightclient/builder.rs

Co-authored-by: Niklas Adolfsson <niklasadolfsson1@gmail.com>

* Switch to smoldot 0.6.0 from 0.5.0

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Move testing to `full_client` and `light_client` higher modules

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Remove subscriptionID type

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Remove subxt/integration-testing feature flag

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Adjust wait_for_blocks documentation

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Adjust utils import for testing

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Remove into_iter from builder construction

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

---------

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>
Co-authored-by: Niklas Adolfsson <niklasadolfsson1@gmail.com>

testing/integration-tests/src/full_client/runtime_api/mod.rs

@@ -0,0 +1,49 @@
+// Copyright 2019-2023 Parity Technologies (UK) Ltd.
+// This file is dual-licensed as Apache-2.0 or GPL-3.0.
+// see LICENSE for license details.
+
+use crate::{node_runtime, test_context};
+use subxt::utils::AccountId32;
+use subxt_signer::sr25519::dev;
+
+#[tokio::test]
+async fn account_nonce() -> Result<(), subxt::Error> {
+    let ctx = test_context().await;
+    let api = ctx.client();
+
+    let alice = dev::alice();
+    let alice_account_id: AccountId32 = alice.public_key().into();
+
+    // Check Alice nonce is starting from 0.
+    let runtime_api_call = node_runtime::apis()
+        .account_nonce_api()
+        .account_nonce(alice_account_id.clone());
+    let nonce = api
+        .runtime_api()
+        .at_latest()
+        .await?
+        .call(runtime_api_call)
+        .await?;
+    assert_eq!(nonce, 0);
+
+    // Do some transaction to bump the Alice nonce to 1:
+    let remark_tx = node_runtime::tx().system().remark(vec![1, 2, 3, 4, 5]);
+    api.tx()
+        .sign_and_submit_then_watch_default(&remark_tx, &alice)
+        .await?
+        .wait_for_finalized_success()
+        .await?;
+
+    let runtime_api_call = node_runtime::apis()
+        .account_nonce_api()
+        .account_nonce(alice_account_id);
+    let nonce = api
+        .runtime_api()
+        .at_latest()
+        .await?
+        .call(runtime_api_call)
+        .await?;
+    assert_eq!(nonce, 1);
+
+    Ok(())
+}