From 1a9d51e276eecb6d9f682201db979703b6a942df Mon Sep 17 00:00:00 2001
From: Carlo Sala <carlosalag@protonmail.com>
Date: Thu, 16 May 2024 11:13:00 +0200
Subject: [PATCH] feat: first commit

---
 .github/workflows/ci.yml      |   28 +
 .github/workflows/publish.yml |   66 ++
 .gitignore                    |  141 ++++
 Cargo.lock                    | 1277 +++++++++++++++++++++++++++++++++
 Cargo.toml                    |   19 +
 README.md                     |   16 +
 package.json                  |   32 +
 pnpm-lock.yaml                |    9 +
 rust-toolchain.toml           |    3 +
 scripts/build.sh              |    8 +
 src/lib.rs                    |   91 +++
 11 files changed, 1690 insertions(+)
 create mode 100644 .github/workflows/ci.yml
 create mode 100644 .github/workflows/publish.yml
 create mode 100644 .gitignore
 create mode 100644 Cargo.lock
 create mode 100644 Cargo.toml
 create mode 100644 README.md
 create mode 100644 package.json
 create mode 100644 pnpm-lock.yaml
 create mode 100644 rust-toolchain.toml
 create mode 100644 scripts/build.sh
 create mode 100644 src/lib.rs

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..1a3c123
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,28 @@
+name: CI
+
+on:
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  build:
+    timeout-minutes: 10
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [20.x]
+    steps:
+      - uses: actions/checkout@v4
+      - uses: moonrepo/setup-rust@v1
+        with:
+          bins: wasm-pack
+          cache-target: release
+      - name: Setup Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+      - uses: pnpm/action-setup@v4
+      - name: Install deps
+        run: pnpm install
+      - name: Build
+        run: pnpm run build
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
new file mode 100644
index 0000000..66af13c
--- /dev/null
+++ b/.github/workflows/publish.yml
@@ -0,0 +1,66 @@
+name: Publish
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  build:
+    timeout-minutes: 10
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [20.x]
+    steps:
+      - uses: actions/checkout@v4
+      - uses: moonrepo/setup-rust@v1
+        with:
+          bins: wasm-pack
+          cache-target: release
+      - name: Setup Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+      - uses: pnpm/action-setup@v4
+      - name: Install deps
+        run: pnpm install
+      - name: Build
+        run: pnpm run build
+  publish:
+    needs: [build]
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [20.x]
+    steps:
+      - uses: actions/checkout@v4
+      - name: Setup Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+          registry-url: https://registry.npmjs.org
+      - name: Check if version has been updated
+        id: check
+        uses: EndBug/version-check@v2
+        with:
+          diff-search: true
+          file-name: ./package.json
+      - uses: moonrepo/setup-rust@v1
+        if: steps.check.outputs.changed == 'true'
+        with:
+          bins: wasm-pack
+          cache-target: release
+      - uses: pnpm/action-setup@v4
+        if: steps.check.outputs.changed == 'true'
+      - name: Install deps
+        if: steps.check.outputs.changed == 'true'
+        run: pnpm install
+      - name: Build
+        if: steps.check.outputs.changed == 'true'
+        run: pnpm run build
+      - name: Publish
+        if: steps.check.outputs.changed == 'true'
+        run: pnpm publish --no-git-checks --access=public --tag latest
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_PUBLISH_AUTOMATION_TOKEN }}
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ebd9fb6
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,141 @@
+# Generated by Cargo
+# will have compiled files and executables
+debug/
+target/
+
+# These are backup files generated by rustfmt
+**/*.rs.bk
+
+# MSVC Windows builds of rustc generate these, which store debugging information
+*.pdb
+
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+.pnpm-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Snowpack dependency directory (https://snowpack.dev/)
+web_modules/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional stylelint cache
+.stylelintcache
+
+# Microbundle cache
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variable files
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+.parcel-cache
+
+# Next.js build output
+.next
+out
+
+# Nuxt.js build / generate output
+.nuxt
+dist
+
+# Gatsby files
+.cache/
+# Comment in the public line in if your project uses Gatsby and not Next.js
+# https://nextjs.org/blog/next-9-1#public-directory-support
+# public
+
+# vuepress build output
+.vuepress/dist
+
+# vuepress v2.x temp and cache directory
+.temp
+.cache
+
+# Docusaurus cache and generated files
+.docusaurus
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+# DynamoDB Local files
+.dynamodb/
+
+# TernJS port file
+.tern-port
+
+# Stores VSCode versions used for testing VSCode extensions
+.vscode-test
+
+# yarn v2
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.yarn/install-state.gz
+.pnp.*
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new file mode 100644
index 0000000..33637ed
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,1277 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
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+ "ed25519-zebra",
+ "either",
+ "event-listener 5.3.0",
+ "fnv",
+ "futures-lite",
+ "hashbrown",
+ "hex",
+ "hmac 0.12.1",
+ "itertools",
+ "libm",
+ "libsecp256k1",
+ "merlin",
+ "nom",
+ "num-bigint",
+ "num-rational",
+ "num-traits",
+ "pbkdf2",
+ "poly1305",
+ "rand",
+ "rand_chacha",
+ "ruzstd",
+ "schnorrkel",
+ "serde",
+ "serde_json",
+ "sha2 0.10.8",
+ "sha3",
+ "siphasher",
+ "slab",
+ "smallvec",
+ "twox-hash",
+ "wasmi",
+ "x25519-dalek",
+ "zeroize",
+]
+
+[[package]]
+name = "spin"
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+
+[[package]]
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+
+[[package]]
+name = "string-interner"
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1c6a0d765f5807e98a091107bae0a56ea3799f66a5de47b2c84c94a39c09974e"
+dependencies = [
+ "cfg-if",
+ "hashbrown",
+]
+
+[[package]]
+name = "subtle"
+version = "2.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+
+[[package]]
+name = "syn"
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+checksum = "72b64191b275b66ffe2469e8af2c1cfe3bafa67b529ead792a6d0160888b4237"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "syn"
+version = "2.0.63"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "tinyvec"
+version = "1.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "87cc5ceb3875bb20c2890005a4e226a4651264a5c75edb2421b52861a0a0cb50"
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+ "tinyvec_macros",
+]
+
+[[package]]
+name = "tinyvec_macros"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+
+[[package]]
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+checksum = "97fee6b57c6a41524a810daee9286c02d7752c4253064d0b05472833a438f675"
+dependencies = [
+ "cfg-if",
+ "static_assertions",
+]
+
+[[package]]
+name = "typenum"
+version = "1.17.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "42ff0bf0c66b8238c6f3b578df37d0b7848e55df8577b3f74f92a69acceeb825"
+
+[[package]]
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+checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
+
+[[package]]
+name = "universal-hash"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fc1de2c688dc15305988b563c3854064043356019f97a4b46276fe734c4f07ea"
+dependencies = [
+ "crypto-common",
+ "subtle",
+]
+
+[[package]]
+name = "version_check"
+version = "0.9.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
+
+[[package]]
+name = "wasm-bindgen"
+version = "0.2.92"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4be2531df63900aeb2bca0daaaddec08491ee64ceecbee5076636a3b026795a8"
+dependencies = [
+ "cfg-if",
+ "wasm-bindgen-macro",
+]
+
+[[package]]
+name = "wasm-bindgen-backend"
+version = "0.2.92"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "614d787b966d3989fa7bb98a654e369c762374fd3213d212cfc0251257e747da"
+dependencies = [
+ "bumpalo",
+ "log",
+ "once_cell",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.63",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-macro"
+version = "0.2.92"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a1f8823de937b71b9460c0c34e25f3da88250760bec0ebac694b49997550d726"
+dependencies = [
+ "quote",
+ "wasm-bindgen-macro-support",
+]
+
+[[package]]
+name = "wasm-bindgen-macro-support"
+version = "0.2.92"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e94f17b526d0a461a191c78ea52bbce64071ed5c04c9ffe424dcb38f74171bb7"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.63",
+ "wasm-bindgen-backend",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-shared"
+version = "0.2.92"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "af190c94f2773fdb3729c55b007a722abb5384da03bc0986df4c289bf5567e96"
+
+[[package]]
+name = "wasm-executor"
+version = "0.0.0"
+dependencies = [
+ "parity-scale-codec",
+ "serde",
+ "serde-wasm-bindgen",
+ "smoldot",
+ "wasm-bindgen",
+]
+
+[[package]]
+name = "wasmi"
+version = "0.32.0-beta.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "89197c624ff57b954a57779b670f43709a023b1e365285af4bf14db37c9bed8b"
+dependencies = [
+ "arrayvec 0.7.4",
+ "multi-stash",
+ "num-derive",
+ "num-traits",
+ "smallvec",
+ "spin",
+ "wasmi_collections",
+ "wasmi_core",
+ "wasmparser-nostd",
+]
+
+[[package]]
+name = "wasmi_collections"
+version = "0.32.0-beta.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3eefbe690421d1957bba7ced57b427263ff66885f6772b7e995806327e1086bf"
+dependencies = [
+ "ahash",
+ "hashbrown",
+ "string-interner",
+]
+
+[[package]]
+name = "wasmi_core"
+version = "0.32.0-beta.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1f873c298a7a5581318f6e7e604f90b2c6fc682ba032592126a0e71017f68cc0"
+dependencies = [
+ "downcast-rs",
+ "libm",
+ "num-traits",
+ "paste",
+]
+
+[[package]]
+name = "wasmparser-nostd"
+version = "0.100.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d5a015fe95f3504a94bb1462c717aae75253e39b9dd6c3fb1062c934535c64aa"
+dependencies = [
+ "indexmap-nostd",
+]
+
+[[package]]
+name = "x25519-dalek"
+version = "2.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c7e468321c81fb07fa7f4c636c3972b9100f0346e5b6a9f2bd0603a52f7ed277"
+dependencies = [
+ "curve25519-dalek",
+ "rand_core",
+ "serde",
+ "zeroize",
+]
+
+[[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 2.0.63",
+]
+
+[[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 2.0.63",
+]
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..7c6a6ed
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,19 @@
+[package]
+name = "wasm-executor"
+version = "0.0.0"
+edition = "2021"
+license = "MIT"
+
+[lib]
+crate-type = ["cdylib"]
+
+[dependencies]
+wasm-bindgen = "0.2.87"
+serde = { version = "1.0", features = ["derive"] }
+serde-wasm-bindgen = "0.6.3"
+smoldot = { version = "0.17.0", default-features = false, git = "https://github.com/smol-dot/smoldot", rev = "6d9fce6902ce2cdc92b9876fea3be6dcea6c73d5" }
+parity-scale-codec = { version = "3.6.12", default-features = false }
+
+[profile.release]
+codegen-units = 1
+lto = true
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..0863be1
--- /dev/null
+++ b/README.md
@@ -0,0 +1,16 @@
+# @polkadot-api/wasm-executor
+
+This package has been strongly influenced by [Chopsticks](https://github.com/AcalaNetwork/chopsticks).
+Its usage is only recommended and supported in NodeJS environments.
+
+At this point, it just exports a `getMetadataFromRuntime` function that runs WASM under the hood, and returns its metadata in `string`.
+
+```ts
+import { getMetadataFromRuntime } from "@polkadot-api/wasm-executor";
+
+// IMPORTANT to prefix it with `0x`!
+const runtime = "0x" + fs.readFileSync("runtime.wasm").toString("hex");
+
+// returns a `0x` prefixed OpaqueMetadata. It's as well prefixed by a compactInt of its length
+const metadata = getMetadataFromRuntime(runtime);
+```
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..9489165
--- /dev/null
+++ b/package.json
@@ -0,0 +1,32 @@
+{
+  "name": "@polkadot-api/wasm-executor",
+  "version": "0.1.0",
+  "author": "Carlo Sala (https://github.com/carlosala)",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/polkadot-api/wasm-executor.git"
+  },
+  "license": "MIT",
+  "sideEffects": false,
+  "files": [
+    "dist"
+  ],
+  "main": "index.js",
+  "types": "./dist/index.d.ts",
+  "exports": {
+    ".": {
+      "module": "./dist/index.js",
+      "import": "./dist/index.js",
+      "require": "./dist/index.js",
+      "default": "./dist/index.js",
+      "types": "./dist/index.d.ts"
+    },
+    "./package.json": "./package.json"
+  },
+  "scripts": {
+    "clean": "rm -rf pkg dist",
+    "wasm": "pnpm run clean && wasm-pack build --target nodejs --out-dir pkg",
+    "build": "pnpm run wasm && bash scripts/build.sh"
+  },
+  "packageManager": "pnpm@9.1.1+sha512.14e915759c11f77eac07faba4d019c193ec8637229e62ec99eefb7cf3c3b75c64447882b7c485142451ee3a6b408059cdfb7b7fa0341b975f12d0f7629c71195"
+}
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
new file mode 100644
index 0000000..9b60ae1
--- /dev/null
+++ b/pnpm-lock.yaml
@@ -0,0 +1,9 @@
+lockfileVersion: '9.0'
+
+settings:
+  autoInstallPeers: true
+  excludeLinksFromLockfile: false
+
+importers:
+
+  .: {}
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
new file mode 100644
index 0000000..e918eb3
--- /dev/null
+++ b/rust-toolchain.toml
@@ -0,0 +1,3 @@
+[toolchain]
+channel = "stable"
+targets = ["wasm32-unknown-unknown"]
diff --git a/scripts/build.sh b/scripts/build.sh
new file mode 100644
index 0000000..1cab2b5
--- /dev/null
+++ b/scripts/build.sh
@@ -0,0 +1,8 @@
+#!/bin/bash
+set -e
+
+mkdir -p dist
+
+cp pkg/wasm_executor.js dist/index.js
+cp pkg/wasm_executor.d.ts dist/index.d.ts
+cp pkg/wasm_executor_bg* dist
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..24e5ff8
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,91 @@
+use wasm_bindgen::prelude::*;
+
+use parity_scale_codec::{Decode, Encode};
+use smoldot::{
+    executor::{
+        host::{Config, HeapPages, HostVmPrototype},
+        runtime_call::{self, RuntimeCall},
+        storage_diff::TrieDiff,
+    },
+    json_rpc::methods::HexString,
+};
+
+#[wasm_bindgen(typescript_custom_section)]
+const TS_APPEND_CONTENT: &'static str = r#"
+type HexString = `0x${string}`
+/**
+ * Get metadata from WASM runtime.
+ *
+ * @param {HexString} buf
+ * @returns {HexString}
+ */
+export function getMetadataFromRuntime(buf: HexString): HexString"#;
+
+/// Get metadata from WASM runtime.
+///
+/// @param {HexString} buf
+/// @returns {HexString}
+#[wasm_bindgen(js_name = getMetadataFromRuntime, skip_typescript, skip_jsdoc)]
+pub fn get_metadata(buf: JsValue) -> Result<JsValue, JsValue> {
+    let wasm = serde_wasm_bindgen::from_value::<HexString>(buf)?;
+    let vm_proto = HostVmPrototype::new(Config {
+        module: wasm,
+        heap_pages: HeapPages::from(2048),
+        exec_hint: smoldot::executor::vm::ExecHint::ValidateAndExecuteOnce,
+        allow_unresolved_imports: true,
+    })
+    .unwrap();
+
+    let params = match run_call(vm_proto.clone(), "Metadata_metadata_versions", Vec::new()) {
+        Ok(res) => {
+            let avail_versions = Vec::<u32>::decode(&mut &res.0[..]).unwrap();
+            if avail_versions.contains(&15) {
+                vec![HexString(<u32>::encode(&15))]
+            } else {
+                vec![HexString(<u32>::encode(&14))]
+            }
+        }
+        Err(_) => {
+            // let's try with Metadata_metadata, since not all chains have
+            // Metadata_metadata_versions
+            let metadata_v14 = run_call(vm_proto.clone(), "Metadata_metadata", Vec::new())?;
+            return Ok(serde_wasm_bindgen::to_value(&metadata_v14)?);
+        }
+    };
+    let val = run_call(vm_proto.clone(), "Metadata_metadata_at_version", params)?;
+
+    // @polkadot-api/wasm-executor
+    // metadata_at_version returns an optional
+    // since we verified that it exists, we remove the first byte
+    Ok(serde_wasm_bindgen::to_value(&HexString(
+        val.0[1..].to_vec(),
+    ))?)
+}
+
+fn run_call(
+    vm_proto: HostVmPrototype,
+    func: &str,
+    parameter: Vec<HexString>,
+) -> Result<HexString, JsValue> {
+    let vm = runtime_call::run(runtime_call::Config {
+        virtual_machine: vm_proto,
+        function_to_call: func,
+        parameter: parameter.into_iter().map(|x| x.0),
+        storage_main_trie_changes: TrieDiff::default(),
+        max_log_level: 0,
+        calculate_trie_changes: false,
+    });
+
+    match vm {
+        Ok(vm) => match vm {
+            RuntimeCall::Finished(res) => match res {
+                Ok(res) => Ok(HexString(res.virtual_machine.value().as_ref().to_vec())),
+                _ => Err(serde_wasm_bindgen::to_value("Error retrieving data")?),
+            },
+            _ => Err(serde_wasm_bindgen::to_value("VM execution not expected")?),
+        },
+        Err((_start_err, _host_vm_proto)) => Err(serde_wasm_bindgen::to_value(
+            &format!("Method {func} err").as_str(),
+        )?),
+    }
+}