diff --git a/chains.yaml b/chains.yaml
index cd1474e..ea66b14 100644
--- a/chains.yaml
+++ b/chains.yaml
@@ -20,3 +20,6 @@ chains:
   - id: 'astr'
     name: 'Astar'
     url: "wss://astar.api.onfinality.io/public-ws"
+  - id: 'wsd-local'
+    name: 'Westend Local'
+    url: "ws://85.208.51.8:36003"
diff --git a/docs/openapi.yaml b/docs/openapi.yaml
index 813bd16..0af6e9d 100644
--- a/docs/openapi.yaml
+++ b/docs/openapi.yaml
@@ -18,6 +18,26 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/Chains'
+  /node/props:
+    post:
+      summary: Retrieve node properties
+      description: Retrieve and cache node properties like decimals, token symbol, chain spec, etc
+      parameters:
+        - name: chainId
+          in: path
+          required: true
+          description: Ticket of the chain
+          schema:
+            type: string
+      responses:
+        '200':
+          description: Chain metadata
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ChainProps'
+        '404':
+          description: Chain not found
   /node/metadata/flush:
     post:
       summary: Flush cache
@@ -57,7 +77,27 @@ paths:
           content:
             application/json:
               schema:
-                $ref: '#/components/schemas/ChainConfig'
+                $ref: '#/components/schemas/Metadata'
+        '404':
+          description: Chain not found
+  /node/metadata/hash:
+    post:
+      summary: Retrieve metadata digest hash
+      description: Retrieve hash of metadata + chain props, required to create the CheckMetadataHash signed extension
+      parameters:
+        - name: chainId
+          in: path
+          required: true
+          description: Ticket of the chain
+          schema:
+            type: string
+      responses:
+        '200':
+          description: Chain metadata digest hash
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/MetadataHash'
         '404':
           description: Chain not found
   /transaction/metadata:
@@ -97,6 +137,12 @@ components:
         shortenedMetadata:
           type: string
           description: Tx shortened metadata on hex format
+    MetadataHash:
+      type: object
+      properties:
+        metadataHash:
+          type: string
+          description: Metadata digest hash
     TxPayload:
       required:
         - txBlob
@@ -119,7 +165,18 @@ components:
                 - dot
                 - dot-hub
                 - bnc
-
+    ChainProps:
+      properties:
+        base58Prefix:
+          type: number
+        decimals:
+          type: number
+        tokenSymbol:
+          type: string
+        specName:
+          type: string
+        specVersion:
+          type: number
     ChainConfig:
       required:
         - id
diff --git a/rust/Cargo.lock b/rust/Cargo.lock
index 275b767..b83a5e8 100644
--- a/rust/Cargo.lock
+++ b/rust/Cargo.lock
@@ -2,6 +2,370 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "Inflector"
+version = "0.11.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fe438c63458706e03479442743baae6c88256498e6431708f6dfc520a26515d3"
+dependencies = [
+ "lazy_static",
+ "regex",
+]
+
+[[package]]
+name = "addr2line"
+version = "0.21.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8a30b2e23b9e17a9f90641c7ab1549cd9b44f296d3ccbf309d2863cfe398a0cb"
+dependencies = [
+ "gimli",
+]
+
+[[package]]
+name = "adler"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
+
+[[package]]
+name = "aead"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d122413f284cf2d62fb1b7db97e02edb8cda96d769b16e443a4f6195e35662b0"
+dependencies = [
+ "crypto-common",
+ "generic-array",
+]
+
+[[package]]
+name = "ahash"
+version = "0.8.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e89da841a80418a9b391ebaea17f5c112ffaaa96f621d2c285b5174da76b9011"
+dependencies = [
+ "cfg-if",
+ "getrandom",
+ "once_cell",
+ "version_check",
+ "zerocopy",
+]
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8e60d3430d3a69478ad0993f19238d2df97c507009a52b3c10addcd7f6bcb916"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
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+version = "0.2.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c6cb57a04249c6480766f7f7cef5467412af1490f8d1e243141daddada3264f"
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "21cc1548309245035eb18aa7f0967da6bc65587005170c56e6ef2788a4cf3f4e"
+dependencies = [
+ "include_dir",
+ "itertools 0.10.5",
+ "proc-macro-error",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.58",
+]
+
+[[package]]
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+dependencies = [
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+ "ark-serialize",
+ "ark-std",
+ "parity-scale-codec",
+ "scale-info",
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+source = "git+https://github.com/w3f/ring-vrf?rev=e9782f9#e9782f938629c90f3adb3fff2358bc8d1386af3e"
+dependencies = [
+ "ark-ec",
+ "ark-ff",
+ "ark-serialize",
+ "ark-std",
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+ "zeroize",
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+
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+checksum = "adb7b85a02b83d2f22f89bd5cac66c9c89474240cb6207cb1efc16d098e822a5"
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+ "ark-std",
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+version = "0.4.2"
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+checksum = "ae3281bc6d0fd7e549af32b52511e1302185bd688fd3359fa36423346ff682ea"
+dependencies = [
+ "proc-macro2",
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+name = "ark-std"
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+checksum = "94893f1e0c6eeab764ade8dc4c0db24caf4fe7cbbaafc0eba0a9030f447b5185"
+dependencies = [
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+ "rand",
+ "rayon",
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+source = "git+https://github.com/w3f/ring-vrf?rev=e9782f9#e9782f938629c90f3adb3fff2358bc8d1386af3e"
+dependencies = [
+ "ark-ff",
+ "ark-serialize",
+ "ark-std",
+ "digest 0.10.7",
+ "rand_core",
+ "sha3",
+]
+
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@@ -21,400 +385,3216 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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+ "miniz_oxide",
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+ "rustc-demangle",
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+source = "git+https://github.com/w3f/ring-vrf?rev=e9782f9#e9782f938629c90f3adb3fff2358bc8d1386af3e"
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+ "ark-ec",
+ "ark-ed-on-bls12-381-bandersnatch",
+ "ark-ff",
+ "ark-serialize",
+ "ark-std",
+ "dleq_vrf",
+ "fflonk",
+ "merlin",
+ "rand_chacha",
+ "rand_core",
+ "ring",
+ "sha2 0.10.8",
+ "sp-ark-bls12-381",
+ "sp-ark-ed-on-bls12-381-bandersnatch",
+ "zeroize",
+]
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 dependencies = [
- "proc-macro2",
- "quote",
- "syn 1.0.109",
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+ "hex-conservative",
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+checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
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+checksum = "cf4b9d6a944f767f8e5e0db018570623c85f3d925ac718db4e06d0187adb21c1"
+
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-checksum = "5443807d6dff69373d433ab9ef5378ad8df50ca6298caf15de6e52e24aaf54d5"
+checksum = "1bc2832c24239b0141d5674bb9174f9d68a8b5b3f2753311927c172ca46f7e9c"
+dependencies = [
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+ "radium",
+ "tap",
+ "wyz",
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 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e57b1e7f6b65ed1f04e79a85a57d755ad56d76fdf1e9bddcc9ae14f71fcdcf54"
+checksum = "d4ed310ef5ab98f5fa467900ed906cb9232dd5376597e00fd4cba2a449d06c0b"
 dependencies = [
- "parity-scale-codec",
- "scale-type-resolver",
+ "hash-db",
 ]
 
 [[package]]
-name = "scale-decode"
-version = "0.12.0"
+name = "tt-call"
+version = "1.0.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7e10e0d345101a013ca3af62c2d44d20213d543cc64d96080c68d931e54360c5"
-dependencies = [
- "derive_more",
- "parity-scale-codec",
- "scale-bits",
- "scale-type-resolver",
- "smallvec",
-]
+checksum = "f4f195fd851901624eee5a58c4bb2b4f06399148fcd0ed336e6f1cb60a9881df"
 
 [[package]]
-name = "scale-info"
-version = "2.11.1"
+name = "twox-hash"
+version = "1.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "788745a868b0e751750388f4e6546eb921ef714a4317fa6954f7cde114eb2eb7"
+checksum = "97fee6b57c6a41524a810daee9286c02d7752c4253064d0b05472833a438f675"
 dependencies = [
  "cfg-if",
- "derive_more",
- "parity-scale-codec",
- "scale-info-derive",
+ "digest 0.10.7",
+ "rand",
+ "static_assertions",
 ]
 
 [[package]]
-name = "scale-info-derive"
-version = "2.11.1"
+name = "typenum"
+version = "1.17.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7dc2f4e8bc344b9fc3d5f74f72c2e55bfc38d28dc2ebc69c194a3df424e4d9ac"
+checksum = "42ff0bf0c66b8238c6f3b578df37d0b7848e55df8577b3f74f92a69acceeb825"
+
+[[package]]
+name = "uint"
+version = "0.9.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "76f64bba2c53b04fcab63c01a7d7427eadc821e3bc48c34dc9ba29c501164b52"
 dependencies = [
- "proc-macro-crate 1.3.1",
- "proc-macro2",
- "quote",
- "syn 1.0.109",
+ "byteorder",
+ "crunchy",
+ "hex",
+ "static_assertions",
 ]
 
 [[package]]
-name = "scale-type-resolver"
-version = "0.2.0"
+name = "unicode-ident"
+version = "1.0.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f0cded6518aa0bd6c1be2b88ac81bf7044992f0f154bfbabd5ad34f43512abcb"
+checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
 
 [[package]]
-name = "semver"
-version = "1.0.22"
+name = "unicode-normalization"
+version = "0.1.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "92d43fe69e652f3df9bdc2b85b2854a0825b86e4fb76bc44d945137d053639ca"
+checksum = "5c5713f0fc4b5db668a2ac63cdb7bb4469d8c9fed047b1d0292cc7b0ce2ba921"
+dependencies = [
+ "tinyvec",
+]
 
 [[package]]
-name = "send_wrapper"
-version = "0.6.0"
+name = "unicode-xid"
+version = "0.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cd0b0ec5f1c1ca621c432a25813d8d60c88abe6d3e08a3eb9cf37d97a0fe3d73"
+checksum = "f962df74c8c05a667b5ee8bcf162993134c104e96440b663c8daa176dc772d8c"
 
 [[package]]
-name = "smallvec"
-version = "1.13.2"
+name = "valuable"
+version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3c5e1a9a646d36c3599cd173a41282daf47c44583ad367b8e6837255952e5c67"
+checksum = "830b7e5d4d90034032940e4ace0d9a9a057e7a45cd94e6c007832e39edb82f6d"
 
 [[package]]
-name = "syn"
-version = "1.0.109"
+name = "version_check"
+version = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "72b64191b275b66ffe2469e8af2c1cfe3bafa67b529ead792a6d0160888b4237"
-dependencies = [
- "proc-macro2",
- "quote",
- "unicode-ident",
-]
+checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
 
 [[package]]
-name = "syn"
-version = "2.0.58"
+name = "w3f-bls"
+version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "44cfb93f38070beee36b3fef7d4f5a16f27751d94b187b666a5cc5e9b0d30687"
+checksum = "7335e4c132c28cc43caef6adb339789e599e39adbe78da0c4d547fad48cbc331"
 dependencies = [
- "proc-macro2",
- "quote",
- "unicode-ident",
+ "ark-bls12-377",
+ "ark-bls12-381",
+ "ark-ec",
+ "ark-ff",
+ "ark-serialize",
+ "ark-serialize-derive",
+ "arrayref",
+ "constcat",
+ "digest 0.10.7",
+ "rand",
+ "rand_chacha",
+ "rand_core",
+ "sha2 0.10.8",
+ "sha3",
+ "thiserror",
+ "zeroize",
 ]
 
 [[package]]
-name = "syn-mid"
-version = "0.6.0"
+name = "walkdir"
+version = "2.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b5dc35bb08dd1ca3dfb09dce91fd2d13294d6711c88897d9a9d60acf39bce049"
+checksum = "29790946404f91d9c5d06f9874efddea1dc06c5efe94541a7d6863108e3a5e4b"
 dependencies = [
- "proc-macro2",
- "quote",
- "syn 2.0.58",
+ "same-file",
+ "winapi-util",
 ]
 
 [[package]]
-name = "toml_datetime"
-version = "0.6.3"
+name = "wasi"
+version = "0.11.0+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7cda73e2f1397b1262d6dfdcef8aafae14d1de7748d66822d3bfeeb6d03e5e4b"
+checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
 
 [[package]]
-name = "toml_edit"
-version = "0.19.15"
+name = "winapi"
+version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1b5bb770da30e5cbfde35a2d7b9b8a2c4b8ef89548a7a6aeab5c9a576e3e7421"
+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
 dependencies = [
- "indexmap",
- "toml_datetime",
- "winnow",
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
 ]
 
 [[package]]
-name = "toml_edit"
-version = "0.20.2"
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "396e4d48bbb2b7554c944bde63101b5ae446cff6ec4a24227428f15eb72ef338"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-util"
+version = "0.1.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4d4cc384e1e73b93bafa6fb4f1df8c41695c8a91cf9c4c64358067d15a7b6c6b"
 dependencies = [
- "indexmap",
- "toml_datetime",
- "winnow",
+ "windows-sys",
 ]
 
 [[package]]
-name = "unicode-ident"
-version = "1.0.12"
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 
 [[package]]
-name = "wasi"
-version = "0.11.0+wasi-snapshot-preview1"
+name = "windows-sys"
+version = "0.52.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
+checksum = "282be5f36a8ce781fad8c8ae18fa3f9beff57ec1b52cb3de0789201425d9a33d"
+dependencies = [
+ "windows-targets",
+]
 
 [[package]]
 name = "windows-targets"
@@ -481,3 +3661,61 @@ checksum = "f593a95398737aeed53e489c785df13f3618e41dbcd6718c6addbf1395aa6876"
 dependencies = [
  "memchr",
 ]
+
+[[package]]
+name = "winnow"
+version = "0.6.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c3c52e9c97a68071b23e836c9380edae937f17b9c4667bd021973efc689f618d"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
+name = "wyz"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "05f360fc0b24296329c78fda852a1e9ae82de9cf7b27dae4b7f62f118f77b9ed"
+dependencies = [
+ "tap",
+]
+
+[[package]]
+name = "zerocopy"
+version = "0.7.34"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ae87e3fcd617500e5d106f0380cf7b77f3c6092aae37191433159dda23cfb087"
+dependencies = [
+ "zerocopy-derive",
+]
+
+[[package]]
+name = "zerocopy-derive"
+version = "0.7.34"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "15e934569e47891f7d9411f1a451d947a60e000ab3bd24fbb970f000387d1b3b"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.58",
+]
+
+[[package]]
+name = "zeroize"
+version = "1.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "525b4ec142c6b68a2d10f01f7bbf6755599ca3f81ea53b8431b7dd348f5fdb2d"
+dependencies = [
+ "zeroize_derive",
+]
+
+[[package]]
+name = "zeroize_derive"
+version = "1.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ce36e65b0d2999d2aafac989fb249189a141aee1f53c612c1f37d72631959f69"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.58",
+]
diff --git a/rust/Cargo.toml b/rust/Cargo.toml
index 8a54be1..4cd9201 100644
--- a/rust/Cargo.toml
+++ b/rust/Cargo.toml
@@ -21,4 +21,5 @@ neon = "1.0.0"
 parity-scale-codec = { version = "3.6.9", default-features = false }
 scale-info = { version = "2.11.1", default-features = false }
 array-bytes = { version = "6.2.2", default-features = false }
-scale-decode = { version = "0.12.0", default-features = false }
\ No newline at end of file
+scale-decode = { version = "0.12.0", default-features = false }
+frame-metadata-hash-extension = { git="https://github.com/paritytech/polkadot-sdk.git", branch = "bkchr-metadata-hash"  }
\ No newline at end of file
diff --git a/rust/index.d.ts b/rust/index.d.ts
index b70a1f5..f11af0b 100644
--- a/rust/index.d.ts
+++ b/rust/index.d.ts
@@ -1,19 +1,19 @@
-import { ChainProps } from "../src/types";
+import { ChainProps } from '../src/types'
 
 export interface RootHashParams {
-  metadata: string;
-  props: ChainProps;
+  metadata: string
+  props: ChainProps
 }
 
 export interface MetadataParams extends RootHashParams {
-  callData: string;
-  seIncludedInExtrinsic: string;
-  seIncludedInSignedData: string;
+  callData: string
+  seIncludedInExtrinsic: string
+  seIncludedInSignedData: string
 }
 export interface MetadataParamsTxBlob extends RootHashParams {
-  txBlob: string;
+  txBlob: string
 }
 
-export declare function getShortMetadataFromTxBlob(params: MetadataParamsTxBlob): string;
-export declare function getShortMetadata(params: MetadataParams): string;
-export declare function getMetadataDigest(params: RootHashParams): string;
+export declare function getShortMetadataFromTxBlob(params: MetadataParamsTxBlob): string
+export declare function getShortMetadata(params: MetadataParams): string
+export declare function getMetadataDigest(params: RootHashParams): string
diff --git a/rust/src/helper.rs b/rust/src/helper.rs
index 8be81af..8906ca8 100644
--- a/rust/src/helper.rs
+++ b/rust/src/helper.rs
@@ -6,8 +6,7 @@ pub fn get_parts_len_from_tx_blob(
     mut tx_blob: &[u8],
     metadata: &RuntimeMetadata,
 ) -> Result<Vec<usize>, String> {
-    let mut call_data_len:usize = 0;
-    let mut signed_extensions_in_extrinsic_len:usize = 0;
+    let mut signed_extensions_in_extrinsic_len = 0;
 
     let prepared = FrameMetadataPrepared::prepare(metadata)?;
     let type_information = prepared.as_type_information()?;
@@ -27,7 +26,7 @@ pub fn get_parts_len_from_tx_blob(
     )
         .map_err(|e| format!("Failed to decode call: {e}"))?;
 
-    call_data_len = tx_blob_ptr_init_len - tx_blob_ptr.len();
+    let call_data_len = tx_blob_ptr_init_len - tx_blob_ptr.len();
 
     if !tx_blob_ptr.is_empty() {
         let included_in_extrinsic = &tx_blob_ptr.to_vec();
@@ -36,7 +35,7 @@ pub fn get_parts_len_from_tx_blob(
             included_in_signed_data: &[],
         });
 
-        let visitor = signed_ext_data
+        let _visitor = signed_ext_data
             .map(|mut signed_ext_data| {
                 visitor.collect_all_types(
                     &type_information.extrinsic_metadata.address_ty,
@@ -74,4 +73,4 @@ pub fn get_parts_len_from_tx_blob(
     }
 
     return Ok(Vec::from([call_data_len, signed_extensions_in_extrinsic_len]))
-}
\ No newline at end of file
+}
diff --git a/rust/src/lib.rs b/rust/src/lib.rs
index 02c7327..11552e2 100644
--- a/rust/src/lib.rs
+++ b/rust/src/lib.rs
@@ -55,68 +55,6 @@ fn get_extra_info<'a>(
     })
 }
 
-fn get_short_metadata(mut cx: FunctionContext) -> JsResult<JsString> {
-    let param_obj = cx.argument::<JsObject>(0).unwrap();
-    let call_data_str = param_obj
-        .get_value(&mut cx, "callData")?
-        .downcast::<JsString, _>(&mut cx)
-        .unwrap()
-        .value(&mut cx);
-    let se_included_in_extrinsic = param_obj
-        .get_value(&mut cx, "seIncludedInExtrinsic")?
-        .downcast::<JsString, _>(&mut cx)
-        .unwrap()
-        .value(&mut cx);
-    let se_included_in_signed_data = param_obj
-        .get_value(&mut cx, "seIncludedInSignedData")?
-        .downcast::<JsString, _>(&mut cx)
-        .unwrap()
-        .value(&mut cx);
-    let metadata_str = param_obj
-        .get_value(&mut cx, "metadata")?
-        .downcast::<JsString, _>(&mut cx)
-        .unwrap()
-        .value(&mut cx);
-    let js_props = param_obj
-        .get_value(&mut cx, "props")?
-        .downcast::<JsObject, _>(&mut cx)
-        .unwrap();
-    let specs = get_extra_info(&mut cx, js_props)?;
-    // The crate accepts now call data. We don't have to fake the signature info
-    let call_data = hex::decode(call_data_str).unwrap();
-    let sig_ext = SignedExtrinsicData {
-        included_in_signed_data: &array_bytes::hex2bytes(se_included_in_signed_data).unwrap(),
-        included_in_extrinsic: &array_bytes::hex2bytes(se_included_in_extrinsic).unwrap(),
-    };
-
-    let metadata = hex::decode(metadata_str).unwrap();
-    let runtime_meta_v15 = RuntimeMetadataV15::decode(&mut &metadata[5..]).unwrap();
-    let runtime_meta = RuntimeMetadata::V15(runtime_meta_v15);
-
-    let registry_proof =
-        match generate_proof_for_extrinsic_parts(&call_data, Some(sig_ext), &runtime_meta) {
-            Ok(x) => x,
-            Err(x) => return Ok(cx.string(x)),
-        };
-
-    // Generates extrinsic_metadata in the same way the crate does
-    let extrinsic_metadata = FrameMetadataPrepared::prepare(
-        &RuntimeMetadataPrefixed::decode(&mut &metadata[..])
-        .unwrap()
-        .1,
-    )
-    .unwrap()
-    .as_type_information()
-    .unwrap()
-    .extrinsic_metadata;
-
-    let meta_proof = MetadataProof {
-        proof: registry_proof,
-        extrinsic: extrinsic_metadata,
-        extra_info: specs,
-    };
-    Ok(cx.string(hex::encode(meta_proof.encode())))
-}
 
 fn get_short_metadata_from_tx_blob(mut cx: FunctionContext) -> JsResult<JsString> {
     let param_obj = cx.argument::<JsObject>(0).unwrap();
@@ -205,9 +143,9 @@ fn get_metadata_digest(mut cx: FunctionContext) -> JsResult<JsString> {
     Ok(cx.string(digest))
 }
 
+
 #[neon::main]
 fn main(mut cx: ModuleContext) -> NeonResult<()> {
-    cx.export_function("getShortMetadata", get_short_metadata)?;
     cx.export_function("getShortMetadataFromTxBlob", get_short_metadata_from_tx_blob)?;
     cx.export_function("getMetadataDigest", get_metadata_digest)?;
     Ok(())
diff --git a/src/server.ts b/src/server.ts
index 467aee9..2827d7f 100644
--- a/src/server.ts
+++ b/src/server.ts
@@ -3,7 +3,7 @@ import bodyParser from 'body-parser'
 import http from 'http'
 
 import { cacheMetadata } from './utils/metadata'
-import { getShortMetadataFromTxBlob } from '../rust'
+import { getShortMetadataFromTxBlob, getMetadataDigest } from '../rust'
 import { Chain, loadChains } from './utils/chains'
 
 interface ChainConfig {
@@ -74,6 +74,62 @@ export function createAndServe() {
     res.status(200).json(chain.metadata)
   })
 
+
+  app.post('/node/metadata/hash', async (req, res) => {
+    const { id: chainId }: ChainConfig = req.body
+
+    const chain = chains.find((b: Chain) => b.id === chainId)
+    if (!chain) {
+      res.status(404).send('chain not found')
+      return
+    }
+
+    let { props, metadataHex } = chain
+    if (!props || !metadataHex === undefined) {
+      const error = await cacheMetadata(chain)
+      if (error) {
+        res.status(400).json(error.message)
+        return
+      }
+    }
+
+    ;({ props, metadataHex } = chain)
+    if (!props || !metadataHex) {
+      res.status(400).send('please, cache metadata first with POST /node/metadata')
+      return
+    }
+
+    const metadataHash = getMetadataDigest({ metadata: metadataHex, props })
+
+    res.status(200).json({ metadataHash })
+  })
+
+  app.post('/node/props', async (req, res) => {
+    const { id: chainId }: ChainConfig = req.body
+
+    const chain = chains.find((b: Chain) => b.id === chainId)
+    if (!chain) {
+      res.status(404).send('chain not found')
+      return
+    }
+
+    let { props } = chain
+    if (!props) {
+      const error = await cacheMetadata(chain)
+      if (error) {
+        res.status(400).json(error.message)
+        return
+      }
+    }
+
+    ;({ props } = chain)
+    if (!props) {
+      res.status(400).send('please, cache metadata first with POST /node/metadata')
+      return
+    }
+
+    res.status(200).json({ ...props })
+  })
   app.post('/transaction/metadata', async (req, res) => {
     const {
       chain: { id: chainId },
@@ -111,7 +167,10 @@ export function createAndServe() {
         txBlob = txBlob.substring(2)
       }
 
-      const txMetadata = Buffer.from(getShortMetadataFromTxBlob({ txBlob, metadata: metadataHex, props }), 'hex')
+      const txMetadata = Buffer.from(
+        getShortMetadataFromTxBlob({ txBlob, metadata: metadataHex, props }),
+        'hex',
+      )
       res.status(200).send({ txMetadata: '0x' + txMetadata.toString('hex') })
     } catch (e) {
       res.status(500).send(e)
diff --git a/tests/common.test.ts b/tests/common.test.ts
index 7b9e507..8240f25 100644
--- a/tests/common.test.ts
+++ b/tests/common.test.ts
@@ -23,6 +23,13 @@ describe('basic api', () => {
     expect(resp.data).not.toBe(undefined)
   })
 
+  test('get chain props', async () => {
+    const resp = await axios.post('http://127.0.0.1:3001/node/props', { id: 'dot' })
+
+    expect(resp.status).toBe(200)
+    expect(resp.data).not.toBe(undefined)
+  })
+
   test('get chain metadata', async () => {
     const resp = await axios.post('http://127.0.0.1:3001/node/metadata', { id: 'dot' })
 
@@ -30,7 +37,14 @@ describe('basic api', () => {
     expect(resp.data).not.toBe(undefined)
   })
 
-  test('get tx metadata', async () => {
+  test('get chain metadata hash', async () => {
+    const resp = await axios.post('http://127.0.0.1:3001/node/metadata/hash', { id: 'dot' })
+
+    expect(resp.status).toBe(200)
+    expect(resp.data).not.toBe(undefined)
+  })
+
+  test('get tx metadata (without checkMetadataHash extension)', async () => {
     const resp = await axios.post('http://127.0.0.1:3001/transaction/metadata', {
       txBlob:
         '0000d050f0c8c0a9706b7c0c4e439245a347627901c89d4791239533d1d2c961f1a72ad615c8530de078e565ba644b38b01bcad249e8c0a80aceb4befe330990a59f74ed976c933db269c64dda40104a0f001900000091b171bb158e2d3848fa23a9f1c25182fb8e20313b2c1eb49219da7a70ce90c3a071db11cdbfd29285f25d402f1aee7a1c0384269c9c2edb476688d35e346998',
@@ -43,6 +57,19 @@ describe('basic api', () => {
     )
   })
 
+  test('get tx metadata (with checkMetadataHash extension)', async () => {
+    const resp = await axios.post('http://127.0.0.1:3001/transaction/metadata', {
+      txBlob:
+        '0000609f7615bb5f0ec9066a3f1366d6a90ba978b273b1ad1b5b020003052a4557332073aaeade2e91827746c10ba63306a001386d0f0019000000569ef659b987a40aee41ea6269d4f09dd9e384a852552cdeaade5504bd2f617c569ef659b987a40aee41ea6269d4f09dd9e384a852552cdeaade5504bd2f617c4671e11346334df0c4a1c933236cc120b67193eb2a8106b48a3788b80d18e368',
+      chain: { id: 'wsd-local' },
+    })
+
+    expect(resp.status).toBe(200)
+    expect(resp.data.txMetadata).toBe(
+      '0x5c082873705f72756e74696d65384d756c74695369676e6174757265011c456432353531390400162d010148656432353531393a3a5369676e6174757265003d02082873705f72756e74696d65384d756c74695369676e6174757265011c537232353531390400162d010148737232353531393a3a5369676e6174757265043d02082873705f72756e74696d65384d756c74695369676e6174757265011445636473610400164102014065636473613a3a5369676e6174757265083d0200034100000003410210306672616d655f73797374656d28657874656e73696f6e733c636865636b5f6d6f7274616c69747938436865636b4d6f7274616c697479000400167506010c4572617106102873705f72756e74696d651c67656e657269630c6572610c4572610120496d6d6f7274616c0000750610306672616d655f73797374656d28657874656e73696f6e732c636865636b5f6e6f6e636528436865636b4e6f6e6365000400110120543a3a4e6f6e63657906086870616c6c65745f7472616e73616374696f6e5f7061796d656e74604368617267655472616e73616374696f6e5061796d656e7400040013013042616c616e63654f663c543e7d0608746672616d655f6d657461646174615f686173685f657874656e73696f6e44436865636b4d6574616461746148617368000401106d6f646516850601104d6f6465810608746672616d655f6d657461646174615f686173685f657874656e73696f6e104d6f6465011c456e61626c6564000485060c1c73705f636f72651863727970746f2c4163636f756e7449643332000400160401205b75383b2033325d000003200000000304083c7072696d69746976655f74797065731048323536000400160401205b75383b2033325d0c00020310083c77657374656e645f72756e74696d652c52756e74696d6543616c6c011853797374656d0400167401ad0173656c663a3a73705f6170695f68696464656e5f696e636c756465735f636f6e7374727563745f72756e74696d653a3a68696464656e5f696e636c7564653a3a64697370617463680a3a3a43616c6c61626c6543616c6c466f723c53797374656d2c2052756e74696d653e00700c306672616d655f73797374656d1870616c6c65741043616c6c011872656d61726b04011872656d61726b1610011c5665633c75383e00740c2873705f72756e74696d65306d756c746961646472657373304d756c746941646472657373010849640400160001244163636f756e74496400b00c2873705f72756e74696d65306d756c746961646472657373304d756c7469416464726573730114496e64657804001501304163636f756e74496e64657804b00c2873705f72756e74696d65306d756c746961646472657373304d756c746941646472657373010c52617704001610011c5665633c75383e08b00c2873705f72756e74696d65306d756c746961646472657373304d756c74694164647265737301244164647265737333320400160401205b75383b2033325d0cb00c2873705f72756e74696d65306d756c746961646472657373304d756c7469416464726573730124416464726573733230040016b401205b75383b2032305d10b000031400000003b4000340000000032d015c31080000320800003308000034080000fb0b0000fc0b0000fc0c0000fd0c0000fe0c0000000d000080060000810600008306000084060000b4060000e406000005070000060700000707000008070000090700000a0700005c070000cc60a5f8b18a506d5bf1147e0b88e4b5de9e6971bc94cf87bb5215741a353a5de7fe30e50cc05bac47e057693533bad660d02acf2b88c2101bea9a3f0c3ffb9e3759863954a5aa85def8f0d577480b8f54d7dd36adeed307398b880e97a6a672b15f21dea97e0758ebbf166ce089ae7310612668f55f7a652d60577e5cc366c442cb78ff8e0dbfeb78178e02cf3aeae04cbaa0254e519f1406e5022c32c09f8b95eb5256f4c76cf6273c1bbbdae194d09c6b039ff0af88074d0e6b545be66a519d35dd9d2688a870256a878571f24e149a00630672bf7a5536f1ded36389f16bc3546dd606e84dadb6d9f9028c5006643912b44d59e166c838088eff26d6dc23b796fefd4a12f9ae273b070f8e6ab53e819f68eda306e4c5129620cb866e5901d4d758848f805e18c8c83578ac294a7abc770d640c73184f993c1b1727e47fce27fccafb39a6628dc49d9a887f9e0eccbed24fc483dae4ee4655bf470b6049fd41f974b538e1e2207791ed9bb612e02eb745846e838f0f2c243812779540bdf7f06f52bcaf91ef7c2bbbb9e5bbf966f866cc7d71a9307ceeedaa1240996b6c5d4f403981ca251e86bea218b3d11d159effba226a82954725f2e08ac13d11016b7eb0f9bca6af67a31e120a8583c14283d1bdf2de9238d9a3f3d4a09559043cd1b432dbf2c268f38c0468b0b506f89ea3910db39fffe4cef79873485c3a0efb6b3e3c79345302466aba4fc6e4c94d52aca2d086675eeea721e732dd96a2415343ad65f919a72ab47560eefc46bc04f854928f992716a277f7a2e5471941cb7062dbe4002ed78e7ca90afed411c5f4319177778375a0d7d3a4919236b5c3764e857770ab62f4c8841f1418f7234e29259dfee393261f84716c085282f7105dc9a10f302e8ff02ad40ecc60787465d90b0a242c29d796711660b238ca8ca90c244aee79bc5b08468c843879ad9f693c15feffaec642dddd1e15b7686435b9afa36effea28f1ce4adee088fa5abde0777a0ddadc9247830db23dba47bbb383ef691ae15eca4c2767130032345d34b70cb7b89afb2fe6b60bb7f67b17f8259b8c96ca0fd3814e151905ab6499c76ccb290d3cc9fa2f41bd00139140b7206e31ff9d98e48560f2a2505f93a4b99da3d5136ceaa97163d769066617874569b224299ff3e07da0425ac2eec6d1f39cd7d6305e9de2e33ad1bcb8165340e0ee486c68fb6f6d8c508183c37310c876b864096b55340067b63c0e99425e23f123d15259ea7666f363d4a1aca34675fc496bc672cdb355d7b45b5751e80ce952900071488654092359a2600153807d59f88b2954ced3c0747b77bfd6aa2dc59e438ee1e330c8fb9dbd31502c193496b9e9cfce6613e65cffce489c65caec56ad1dfe3043eaaa99513df99ad0ed3eb848a4487fc098cce7b1b79cfeba4ae729204ca002fd2726b17bff18a86d4bc8fb55a4fe1da813c9e1834396125caee1579b166c030684cc76188a9aae5573852dfcab15288ea58a4f6c8e3b3cd9feb7ef579fcbd8fe4e3ece85c2a551056a2d070518475d9848c314b427f328b71d14863c8954645dc967cdbe2ddeb384e6cf630dcfcb691f2bdf914f5f9277debc2ef7c82170e143cfe883f363b197c4fd48abcd4566a49df8b70e93f832cd39b4271edb8da00d726115f3881e58651008c463adbf0bab4b23fdff79322c16ec279a3120c88a93771ffe6eb549829ee6d7f4c2fd9646abc1111500674aa44b8069525decf2807109fc45eb2ca83f27522b7f26ea881f0cf0b669df8d351099b1176bccfa747f3434427a1e2b3282a8d174d21539e28882ac751cba416472b94f88879029903616ae5ea0858a61553ac3a3db00250b1d8f3486bd1b468b0ea421f4f40b48fd467cdcf9b4219212d9d6311c974319f981c176025a941d75f454c133b08d665dd994f4da3e4a8e06d43c0a022971e4d41bdd7e2ec3cdba8c8f78dd151980ab5da065978ba590655d987e5b3825330824c718c8d4c45fa2f4fae9f63e98062c824d66d0c6c641765ff575d59e9751ecc4b115b2be47dab01c95a317ba0c62add6f3fed1bcf3ff16f99c739f4aa298d1626007d3be7a96424af48ca6437ef9195a2ed8ea979924e80351ac5228dc3bb5d32f0b18129d1c77ae834bce8f0032dfdce289bcd23114c61336a8a551f0c20ec980e75df122b7f9e19c0e9bc114d6042f63cc6d1ff637d152eada843f12f1077821d27ea415d9ae2512d502df1cf220b0800a3de7388bc7c10446d1a9d9cfc1a46192759772262282875098d58159e78ed5dae06cedf40416b01670163d022448436865636b4e6f6e5a65726f53656e646572151540436865636b5370656356657273696f6e150538436865636b547856657273696f6e150530436865636b47656e6573697315160c38436865636b4d6f7274616c697479167106160c28436865636b4e6f6e6365167906152c436865636b5765696768741515604368617267655472616e73616374696f6e5061796d656e74167d061544436865636b4d65746164617461486173681681061604386d0f001c77657374656e642a000c0c3f3f3f',
+    )
+  })
+
   test('flush chain metadata', async () => {
     const resp = await axios.post('http://127.0.0.1:3001/node/metadata/flush', { id: 'dot' })
     expect(resp.status).toBe(200)