diff --git a/Cargo.lock b/Cargo.lock
index 49de10a9..646b3129 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -15,7 +15,7 @@ dependencies = [
 [[package]]
 name = "ac-compose-macros"
 version = "0.5.0"
-source = "git+https://github.com/encointer/substrate-api-client.git?branch=crates-io-v0.17.0-patch-for-stable-sdk-1.13#673dfb2f152ab06a532e668af95eca93666fc910"
+source = "git+https://github.com/encointer/substrate-api-client.git?branch=crates-io-v0.17.0-patch-for-stable-check-metadata-hash-sdk-1.13#84f2f7f0aa966d383184eee02b0873fc92aef305"
 dependencies = [
  "ac-primitives",
  "log",
@@ -25,7 +25,7 @@ dependencies = [
 [[package]]
 name = "ac-node-api"
 version = "0.6.0"
-source = "git+https://github.com/encointer/substrate-api-client.git?branch=crates-io-v0.17.0-patch-for-stable-sdk-1.13#673dfb2f152ab06a532e668af95eca93666fc910"
+source = "git+https://github.com/encointer/substrate-api-client.git?branch=crates-io-v0.17.0-patch-for-stable-check-metadata-hash-sdk-1.13#84f2f7f0aa966d383184eee02b0873fc92aef305"
 dependencies = [
  "ac-primitives",
  "bitvec",
@@ -35,8 +35,8 @@ dependencies = [
  "hex",
  "log",
  "parity-scale-codec",
- "scale-bits",
- "scale-decode",
+ "scale-bits 0.4.0",
+ "scale-decode 0.10.0",
  "scale-encode",
  "scale-info",
  "scale-value",
@@ -53,7 +53,7 @@ dependencies = [
 [[package]]
 name = "ac-primitives"
 version = "0.9.1"
-source = "git+https://github.com/encointer/substrate-api-client.git?branch=crates-io-v0.17.0-patch-for-stable-sdk-1.13#673dfb2f152ab06a532e668af95eca93666fc910"
+source = "git+https://github.com/encointer/substrate-api-client.git?branch=crates-io-v0.17.0-patch-for-stable-check-metadata-hash-sdk-1.13#84f2f7f0aa966d383184eee02b0873fc92aef305"
 dependencies = [
  "frame-system",
  "impl-serde",
@@ -2148,6 +2148,7 @@ dependencies = [
  "encointer-node-notee-runtime",
  "frame-benchmarking",
  "frame-benchmarking-cli",
+ "frame-metadata-hash-extension",
  "frame-system",
  "frame-try-runtime",
  "futures",
@@ -2204,6 +2205,7 @@ dependencies = [
  "encointer-primitives",
  "frame-benchmarking",
  "frame-executive",
+ "frame-metadata-hash-extension",
  "frame-support",
  "frame-system",
  "frame-system-benchmarking",
@@ -2720,6 +2722,22 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "frame-metadata-hash-extension"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ba1fa15dc90efe948898c06a3be111628230db100ffa2907e662062e9c9d1abd"
+dependencies = [
+ "array-bytes",
+ "docify",
+ "frame-support",
+ "frame-system",
+ "log",
+ "parity-scale-codec",
+ "scale-info",
+ "sp-runtime",
+]
+
 [[package]]
 name = "frame-support"
 version = "35.0.0"
@@ -4718,6 +4736,20 @@ dependencies = [
  "hash-db",
 ]
 
+[[package]]
+name = "merkleized-metadata"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f313fcff1d2a4bcaa2deeaa00bf7530d77d5f7bd0467a117dde2e29a75a7a17a"
+dependencies = [
+ "array-bytes",
+ "blake3",
+ "frame-metadata 16.0.0",
+ "parity-scale-codec",
+ "scale-decode 0.13.1",
+ "scale-info",
+]
+
 [[package]]
 name = "merlin"
 version = "3.0.0"
@@ -8354,6 +8386,16 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "scale-bits"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e57b1e7f6b65ed1f04e79a85a57d755ad56d76fdf1e9bddcc9ae14f71fcdcf54"
+dependencies = [
+ "parity-scale-codec",
+ "scale-type-resolver",
+]
+
 [[package]]
 name = "scale-decode"
 version = "0.10.0"
@@ -8363,12 +8405,25 @@ dependencies = [
  "derive_more",
  "parity-scale-codec",
  "primitive-types",
- "scale-bits",
+ "scale-bits 0.4.0",
  "scale-decode-derive",
  "scale-info",
  "smallvec",
 ]
 
+[[package]]
+name = "scale-decode"
+version = "0.13.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e98f3262c250d90e700bb802eb704e1f841e03331c2eb815e46516c4edbf5b27"
+dependencies = [
+ "derive_more",
+ "parity-scale-codec",
+ "scale-bits 0.6.0",
+ "scale-type-resolver",
+ "smallvec",
+]
+
 [[package]]
 name = "scale-decode-derive"
 version = "0.10.0"
@@ -8391,7 +8446,7 @@ dependencies = [
  "derive_more",
  "parity-scale-codec",
  "primitive-types",
- "scale-bits",
+ "scale-bits 0.4.0",
  "scale-encode-derive",
  "scale-info",
  "smallvec",
@@ -8436,6 +8491,12 @@ dependencies = [
  "syn 1.0.109",
 ]
 
+[[package]]
+name = "scale-type-resolver"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f0cded6518aa0bd6c1be2b88ac81bf7044992f0f154bfbabd5ad34f43512abcb"
+
 [[package]]
 name = "scale-value"
 version = "0.13.0"
@@ -8446,8 +8507,8 @@ dependencies = [
  "either",
  "frame-metadata 15.1.0",
  "parity-scale-codec",
- "scale-bits",
- "scale-decode",
+ "scale-bits 0.4.0",
+ "scale-decode 0.10.0",
  "scale-encode",
  "scale-info",
 ]
@@ -9791,7 +9852,7 @@ dependencies = [
 [[package]]
 name = "substrate-api-client"
 version = "0.17.0"
-source = "git+https://github.com/encointer/substrate-api-client.git?branch=crates-io-v0.17.0-patch-for-stable-sdk-1.13#673dfb2f152ab06a532e668af95eca93666fc910"
+source = "git+https://github.com/encointer/substrate-api-client.git?branch=crates-io-v0.17.0-patch-for-stable-check-metadata-hash-sdk-1.13#84f2f7f0aa966d383184eee02b0873fc92aef305"
 dependencies = [
  "ac-compose-macros",
  "ac-node-api",
@@ -9840,7 +9901,7 @@ checksum = "b285e7d183a32732fdc119f3d81b7915790191fad602b7c709ef247073c77a2e"
 [[package]]
 name = "substrate-client-keystore"
 version = "0.10.0"
-source = "git+https://github.com/encointer/substrate-api-client.git?branch=crates-io-v0.17.0-patch-for-stable-sdk-1.13#673dfb2f152ab06a532e668af95eca93666fc910"
+source = "git+https://github.com/encointer/substrate-api-client.git?branch=crates-io-v0.17.0-patch-for-stable-check-metadata-hash-sdk-1.13#84f2f7f0aa966d383184eee02b0873fc92aef305"
 dependencies = [
  "array-bytes",
  "async-trait",
@@ -9925,13 +9986,22 @@ version = "23.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7dc993ad871b63fbba60362f3ea86583f5e7e1256e8fdcb3b5b249c9ead354bf"
 dependencies = [
+ "array-bytes",
  "build-helper",
  "cargo_metadata",
  "console",
  "filetime",
+ "frame-metadata 16.0.0",
+ "merkleized-metadata",
+ "parity-scale-codec",
  "parity-wasm",
  "polkavm-linker",
+ "sc-executor",
+ "sp-core",
+ "sp-io",
  "sp-maybe-compressed-blob",
+ "sp-tracing",
+ "sp-version",
  "strum 0.26.3",
  "tempfile",
  "toml 0.8.8",
diff --git a/Cargo.toml b/Cargo.toml
index 8127809e..968ae969 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -51,6 +51,7 @@ pallet-encointer-scheduler = { default-features = false, version = "~12.1.0" }
 frame-benchmarking = { version = "35.0.0", default-features = false }
 frame-benchmarking-cli = { version = "39.0.0" }
 frame-executive = { version = "35.0.0", default-features = false }
+frame-metadata-hash-extension = { version = "0.3.0", default-features = false }
 frame-support = { version = "35.0.0", default-features = false }
 frame-system = { version = "35.0.0", default-features = false }
 frame-system-benchmarking = { version = "35.0.0", default-features = false }
@@ -125,11 +126,11 @@ substrate-client-keystore = { version = "0.10.0" }
 [patch.crates-io]
 ## api client
 # todo: temporary patch until ^0.17.1 is released
-ac-compose-macros = { git = "https://github.com/encointer/substrate-api-client.git", branch = "crates-io-v0.17.0-patch-for-stable-sdk-1.13" }
-ac-node-api = { git = "https://github.com/encointer/substrate-api-client.git", branch = "crates-io-v0.17.0-patch-for-stable-sdk-1.13" }
-ac-primitives = { git = "https://github.com/encointer/substrate-api-client.git", branch = "crates-io-v0.17.0-patch-for-stable-sdk-1.13" }
-substrate-api-client = { git = "https://github.com/encointer/substrate-api-client.git", branch = "crates-io-v0.17.0-patch-for-stable-sdk-1.13" }
-substrate-client-keystore = { git = "https://github.com/encointer/substrate-api-client.git", branch = "crates-io-v0.17.0-patch-for-stable-sdk-1.13" }
+ac-compose-macros = { git = "https://github.com/encointer/substrate-api-client.git", branch = "crates-io-v0.17.0-patch-for-stable-check-metadata-hash-sdk-1.13" }
+ac-node-api = { git = "https://github.com/encointer/substrate-api-client.git", branch = "crates-io-v0.17.0-patch-for-stable-check-metadata-hash-sdk-1.13" }
+ac-primitives = { git = "https://github.com/encointer/substrate-api-client.git", branch = "crates-io-v0.17.0-patch-for-stable-check-metadata-hash-sdk-1.13" }
+substrate-api-client = { git = "https://github.com/encointer/substrate-api-client.git", branch = "crates-io-v0.17.0-patch-for-stable-check-metadata-hash-sdk-1.13" }
+substrate-client-keystore = { git = "https://github.com/encointer/substrate-api-client.git", branch = "crates-io-v0.17.0-patch-for-stable-check-metadata-hash-sdk-1.13" }
 #ac-node-api = { path = "../../substrate-api-client/node-api" }
 #ac-primitives = { path = "../../substrate-api-client/primitives" }
 #substrate-api-client = { path = "../../substrate-api-client" }
diff --git a/node/Cargo.toml b/node/Cargo.toml
index f735a808..680f4726 100644
--- a/node/Cargo.toml
+++ b/node/Cargo.toml
@@ -28,6 +28,7 @@ futures = { workspace = true }
 log = { workspace = true }
 serde_json = { workspace = true }
 
+frame-metadata-hash-extension = { workspace = true, features = ["std"] }
 frame-system = { workspace = true, features = ["std"] }
 pallet-asset-tx-payment = { workspace = true, features = ["std"] }
 sc-cli = { workspace = true }
diff --git a/node/src/benchmarking.rs b/node/src/benchmarking.rs
index b0a75303..ab4066db 100644
--- a/node/src/benchmarking.rs
+++ b/node/src/benchmarking.rs
@@ -120,6 +120,7 @@ pub fn create_benchmark_extrinsic(
 		frame_system::CheckNonce::<runtime::Runtime>::from(nonce),
 		frame_system::CheckWeight::<runtime::Runtime>::new(),
 		pallet_asset_tx_payment::ChargeAssetTxPayment::<runtime::Runtime>::from(0, None),
+		frame_metadata_hash_extension::CheckMetadataHash::<runtime::Runtime>::new(false),
 	);
 
 	let raw_payload = runtime::SignedPayload::from_raw(
@@ -134,6 +135,7 @@ pub fn create_benchmark_extrinsic(
 			(),
 			(),
 			(),
+			None,
 		),
 	);
 	let signature = raw_payload.using_encoded(|e| sender.sign(e));
diff --git a/runtime/Cargo.toml b/runtime/Cargo.toml
index 32ff07a0..78ee0568 100644
--- a/runtime/Cargo.toml
+++ b/runtime/Cargo.toml
@@ -32,6 +32,7 @@ pallet-encointer-scheduler = { workspace = true }
 
 # substrate deps
 frame-executive = { workspace = true }
+frame-metadata-hash-extension = { workspace = true }
 frame-support = { workspace = true }
 frame-system = { workspace = true }
 pallet-asset-tx-payment = { workspace = true }
@@ -73,7 +74,7 @@ frame-system-benchmarking = { workspace = true, optional = true }
 hex-literal = { workspace = true, optional = true }
 
 [build-dependencies]
-substrate-wasm-builder = { workspace = true }
+substrate-wasm-builder = { workspace = true, optional = true, features = ["metadata-hash"] }
 
 [features]
 default = ["std"]
@@ -83,6 +84,7 @@ std = [
     "encointer-primitives/serde_derive",
     "encointer-primitives/std",
     "frame-executive/std",
+    "frame-metadata-hash-extension/std",
     "frame-support/std",
     "frame-system-rpc-runtime-api/std",
     "frame-system/std",
@@ -124,6 +126,7 @@ std = [
     "sp-std/std",
     "sp-transaction-pool/std",
     "sp-version/std",
+    "substrate-wasm-builder",
 ]
 runtime-benchmarks = [
     "frame-benchmarking/runtime-benchmarks",
diff --git a/runtime/build.rs b/runtime/build.rs
index 9b53d245..c77071ca 100644
--- a/runtime/build.rs
+++ b/runtime/build.rs
@@ -1,9 +1,9 @@
-use substrate_wasm_builder::WasmBuilder;
-
+#[cfg(feature = "std")]
 fn main() {
-	WasmBuilder::new()
-		.with_current_project()
-		.export_heap_base()
-		.import_memory()
+	substrate_wasm_builder::WasmBuilder::init_with_defaults()
+		.enable_metadata_hash("ERT", 12)
 		.build()
 }
+
+#[cfg(not(feature = "std"))]
+fn main() {}
diff --git a/runtime/src/lib.rs b/runtime/src/lib.rs
index 2edd0ebe..76baafdc 100644
--- a/runtime/src/lib.rs
+++ b/runtime/src/lib.rs
@@ -480,7 +480,7 @@ pub struct NoConversion;
 impl ConversionFromAssetBalance<u128, (), u128> for NoConversion {
 	type Error = ();
 	fn from_asset_balance(balance: Balance, _asset_id: ()) -> Result<Balance, Self::Error> {
-		return Ok(balance)
+		return Ok(balance);
 	}
 	#[cfg(feature = "runtime-benchmarks")]
 	fn ensure_successful(_: ()) {}
@@ -590,6 +590,7 @@ pub type SignedExtra = (
 	frame_system::CheckNonce<Runtime>,
 	frame_system::CheckWeight<Runtime>,
 	pallet_asset_tx_payment::ChargeAssetTxPayment<Runtime>,
+	frame_metadata_hash_extension::CheckMetadataHash<Runtime>,
 );
 /// Unchecked extrinsic type as expected by this runtime.
 pub type UncheckedExtrinsic =