feat(runtime): add metadata signed-extension

Add a new signed extension that enables the metadata hash verification feature approved under [RFC 0078](https://polkadot-fellows.github.io/RFCs/approved/0078-merkleized-metadata.html#rfc-0078-merkleized-metadata). This enhancement will support the new generic ledger hardware wallet app and future hardware wallets within the Polkadot ecosystem.

Cargo.toml

@@ -30,6 +30,7 @@ frame-system = { git = "https://github.com/paritytech/polkadot-sdk", branch = "r
 frame-system-benchmarking = { git = "https://github.com/paritytech/polkadot-sdk", branch = "release-polkadot-v1.8.0", default-features = false }
 frame-system-rpc-runtime-api = { git = "https://github.com/paritytech/polkadot-sdk", branch = "release-polkadot-v1.8.0", default-features = false }
 frame-try-runtime = { git = "https://github.com/paritytech/polkadot-sdk", branch = "release-polkadot-v1.8.0", default-features = false }
+frame-metadata-hash-extension = { git = "https://github.com/paritytech/polkadot-sdk", branch = "release-polkadot-v1.8.0", default-features = false }
 sp-api = { git = "https://github.com/paritytech/polkadot-sdk", branch = "release-polkadot-v1.8.0", default-features = false }
 sp-core = { git = "https://github.com/paritytech/polkadot-sdk", branch = "release-polkadot-v1.8.0", default-features = false }
 sp-io = { git = "https://github.com/paritytech/polkadot-sdk", branch = "release-polkadot-v1.8.0", default-features = false }
@@ -44,6 +45,7 @@ scale-info = { version = "2.10.0", default-features = false, features = [
 sp-keystore = { git = "https://github.com/paritytech/polkadot-sdk", branch = "release-polkadot-v1.8.0", default-features = false }
 sp-keyring = { git = "https://github.com/paritytech/polkadot-sdk", branch = "release-polkadot-v1.8.0", default-features = false }
 sp-version = { git = "https://github.com/paritytech/polkadot-sdk", branch = "release-polkadot-v1.8.0", default-features = false }
+substrate-wasm-builder = { git = "https://github.com/paritytech/polkadot-sdk", branch = "release-polkadot-v1.8.0", default-features = false }
 chrono = { version = "0.4.24" }
 pretty_assertions = { version = "1.3.0" }
 smallvec = "1.11.0"

node/cli/Cargo.toml

@@ -31,6 +31,7 @@ frame-benchmarking-cli = { workspace = true, optional = true }
 frame-benchmarking = { workspace = true, optional = true }
 frame-support = { workspace = true }
 frame-system = { workspace = true }
+frame-metadata-hash-extension = { workspace = true }
 pallet-balances = { workspace = true }
 pallet-transaction-payment = { workspace = true }
 sc-cli = { workspace = true, optional = true }

node/cli/src/benchmarking.rs

@@ -130,6 +130,7 @@ pub fn create_benchmark_extrinsic(
 		pallet_frequency_tx_payment::ChargeFrqTransactionPayment::<runtime::Runtime>::from(0),
 		pallet_msa::CheckFreeExtrinsicUse::<runtime::Runtime>::new(),
 		pallet_handles::handles_signed_extension::HandlesSignedExtension::<runtime::Runtime>::new(),
+		frame_metadata_hash_extension::CheckMetadataHash::<runtime::Runtime>::new(false),
 	);
 
 	let raw_payload = sp_runtime::generic::SignedPayload::from_raw(
@@ -146,6 +147,7 @@ pub fn create_benchmark_extrinsic(
 			(),
 			(),
 			(),
+			None,
 		),
 	);
 	let signature = raw_payload.using_encoded(|e| sender.sign(e));

runtime/frequency/Cargo.toml

@@ -12,7 +12,7 @@ version = "0.0.0"
 targets = ["x86_64-unknown-linux-gnu"]
 
 [build-dependencies]
-substrate-wasm-builder = { git = "https://github.com/paritytech/polkadot-sdk", branch = "release-polkadot-v1.8.0"}
+substrate-wasm-builder = { optional = true, workspace = true }
 
 [dependencies]
 parity-scale-codec = { workspace = true, features = ["derive"] }
@@ -30,6 +30,7 @@ frame-system = { workspace = true }
 frame-system-benchmarking = { workspace = true, optional = true }
 frame-system-rpc-runtime-api = { workspace = true }
 frame-try-runtime = { workspace = true, optional = true }
+frame-metadata-hash-extension = { workspace = true }
 
 pallet-aura = { workspace = true }
 pallet-authorship = { workspace = true }
@@ -162,6 +163,8 @@ std = [
   "common-runtime/std",
   "sp-version/std",
   "system-runtime-api/std",
+    "substrate-wasm-builder",
+  "frame-metadata-hash-extension/std",
 ]
 runtime-benchmarks = [
   "cumulus-pallet-parachain-system/runtime-benchmarks",
@@ -238,4 +241,13 @@ frequency-local = ["common-runtime/frequency-local"]
 frequency-no-relay = ["common-runtime/frequency-no-relay"]
 # Following features are used in generating lean wasms
 no-metadata-docs = ["frame-support/no-metadata-docs"]
-on-chain-release-build = ["sp-api/disable-logging"]
+on-chain-release-build = ["metadata-hash", "sp-api/disable-logging"]
+
+# Enable the metadata hash generation.
+#
+# This is hidden behind a feature because it increases the compile time.
+# The wasm binary needs to be compiled twice, once to fetch the metadata,
+# generate the metadata hash and then a second time with the
+# `RUNTIME_METADATA_HASH` environment variable set for the `CheckMetadataHash`
+# extension.
+metadata-hash = ["substrate-wasm-builder/metadata-hash"]

runtime/frequency/build.rs

@@ -1,12 +1,26 @@
-use substrate_wasm_builder::WasmBuilder;
+#[cfg(all(feature = "std", feature = "metadata-hash"))]
+fn main() {
+	substrate_wasm_builder::WasmBuilder::init_with_defaults()
+		.enable_metadata_hash("FRQCY", 8)
+		.build();
+
+	substrate_wasm_builder::WasmBuilder::init_with_defaults()
+		.set_file_name("fast_runtime_binary.rs")
+		.enable_feature("fast-runtime")
+		.enable_metadata_hash("FRQCY", 8)
+		.build();
+}
 
+#[cfg(all(feature = "std", not(feature = "metadata-hash")))]
 fn main() {
-	// VSCode Users: Uncomment the following line to disable the ANSI color codes.
-	// The OUTPUT pane does not understand ANSI color codes and will show garbage without this.
-	// std::env::set_var("WASM_BUILD_NO_COLOR", "1");
-	WasmBuilder::new()
+	substrate_wasm_builder::WasmBuilder::new()
 		.with_current_project()
 		.export_heap_base()
 		.import_memory()
-		.build()
+		.build();
 }
+
+/// The wasm builder is deactivated when compiling
+/// this crate for wasm to speed up the compilation.
+#[cfg(not(feature = "std"))]
+fn main() {}

runtime/frequency/src/lib.rs

@@ -298,6 +298,7 @@ pub type SignedExtra = (
 	pallet_frequency_tx_payment::ChargeFrqTransactionPayment<Runtime>,
 	pallet_msa::CheckFreeExtrinsicUse<Runtime>,
 	pallet_handles::handles_signed_extension::HandlesSignedExtension<Runtime>,
+	frame_metadata_hash_extension::CheckMetadataHash<Runtime>,
 );
 /// A Block signed with a Justification
 pub type SignedBlock = generic::SignedBlock<Block>;