Add light client platform WASM compatible (#1026)

* Cargo update in prep for wasm build

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

* Add light client test

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

* Implement low level socket

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

* Add native platform primitives

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

* Add wasm platform primitives

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

* Implement smoldot platform

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

* Adjust code to use custom platform

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

* Adjust feature flags

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

* tests: Adjust wasm endpoint to accept ws for p2p

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

* Adjust wasm socket

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

* Book mention of wasm

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

* ci: Propagate env variable properly

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

* subxt: Revert to native feature flags

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

* cli: Use tokio rt-multi-thread feature

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

* subxt: Add tokio feature flags for native platform

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

* wasm: Use polkadot live for wasm testing

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

* wasm: Add support for DNS p2p addresses

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

* wasm: Disable logs

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

* wasm: Run wasm test for firefox driver

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

* wasm: Reenable chrome driver

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

* Move lightclient RPC to dedicated crate for better feature flags and modularity

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

* Use subxt-lightclient low level RPC crate

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

* Apply cargo fmt

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

* Enable default:native feature for cargo check

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

* ci: Extra step for subxt-lightclient similar to signer crate

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

* Remove native platform code and use smoldot instead

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

* codegen: Enable tokio/multi-threads

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

* lightclient: Refactor modules

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

* Adjust testing crates

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

* ci: Run light-client WASM tests

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

* wasm-rpc: Remove light-client imports

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

* testing: Update wasm cargo.lock files

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

* ci: Spawn substrate node with deterministic p2p address for WASM tests

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

* wasm_socket: Use rc and refcell

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

* wasm_socket: Switch back to Arc<Mutex<>>

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

* Add comments

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

---------

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

testing/wasm-lightclient-tests/Cargo.toml

@@ -0,0 +1,18 @@
+[package]
+name = "wasm-lightclient-tests"
+version = "0.1.0"
+edition = "2021"
+publish = false
+
+[dev-dependencies]
+wasm-bindgen-test = "0.3.24"
+tracing-wasm = "0.2.1"
+tracing = "0.1.34"
+console_error_panic_hook = "0.1.7"
+serde_json = "1"
+futures-util = "0.3.28"
+
+# This crate is not a part of the workspace, because it
+# requires the "jsonrpsee web unstable-light-client" features to be enabled, which we don't
+# want enabled for workspace builds in general.
+subxt = { path = "../../subxt", default-features = false, features = ["web", "jsonrpsee", "unstable-light-client"] }