From 1adf9c4555106eaffc01d3ca6b15d6d8f6089bea Mon Sep 17 00:00:00 2001
From: NathanosDev <contact@nathanos.dev>
Date: Thu, 20 Jul 2023 14:52:19 +0200
Subject: [PATCH 1/2] feat: add test utils wasm package

add unit test for certificate verification JS library

re #TT-296
---
 .github/actions/setup-dfx/action.yml          |    6 +-
 .github/workflows/pull-request.yml            |    3 +
 Cargo.toml                                    |    3 +-
 README.md                                     |    2 +
 .../src/frontend/src/index.ts                 |   14 +-
 package.json                                  |    3 +-
 .../certificate-verification-js/README.md     |   14 +-
 .../certificate-verification-js/package.json  |    3 +
 .../src/index.spec.ts                         |   49 +
 .../certificate-verification-js/src/index.ts  |   22 +-
 .../Cargo.lock                                | 2298 +++++++++++++++++
 .../Cargo.toml                                |   37 +
 .../ic-certification-test-utils-wasm/LICENSE  |  202 ++
 .../README.md                                 |    1 +
 .../package.json                              |   25 +
 .../src/certificate.rs                        |   36 +
 .../src/certificate_builder.rs                |  195 ++
 .../src/encoding.rs                           |   18 +
 .../src/error.rs                              |   55 +
 .../src/lib.rs                                |    7 +
 .../src/signature.rs                          |   69 +
 .../src/tree.rs                               |   37 +
 pnpm-lock.yaml                                |  221 +-
 pnpm-workspace.yaml                           |    1 +
 rust-toolchain.toml                           |    4 +
 scripts/package.sh                            |   26 +-
 26 files changed, 3220 insertions(+), 131 deletions(-)
 create mode 100644 packages/certificate-verification-js/src/index.spec.ts
 create mode 100644 packages/ic-certification-test-utils-wasm/Cargo.lock
 create mode 100644 packages/ic-certification-test-utils-wasm/Cargo.toml
 create mode 100644 packages/ic-certification-test-utils-wasm/LICENSE
 create mode 100644 packages/ic-certification-test-utils-wasm/README.md
 create mode 100644 packages/ic-certification-test-utils-wasm/package.json
 create mode 100644 packages/ic-certification-test-utils-wasm/src/certificate.rs
 create mode 100644 packages/ic-certification-test-utils-wasm/src/certificate_builder.rs
 create mode 100644 packages/ic-certification-test-utils-wasm/src/encoding.rs
 create mode 100644 packages/ic-certification-test-utils-wasm/src/error.rs
 create mode 100644 packages/ic-certification-test-utils-wasm/src/lib.rs
 create mode 100644 packages/ic-certification-test-utils-wasm/src/signature.rs
 create mode 100644 packages/ic-certification-test-utils-wasm/src/tree.rs
 create mode 100644 rust-toolchain.toml

diff --git a/.github/actions/setup-dfx/action.yml b/.github/actions/setup-dfx/action.yml
index 09ee6d94..7bc06749 100644
--- a/.github/actions/setup-dfx/action.yml
+++ b/.github/actions/setup-dfx/action.yml
@@ -4,10 +4,6 @@ description: Setup DFX
 runs:
   using: 'composite'
   steps:
-    - name: Get DFX version
-      shell: bash
-      run: echo "dfx_version=$(cat dfx.json | jq -r .dfx)" >> "$GITHUB_ENV"
-
     - name: Cache DFX
       uses: actions/cache@v3
       with:
@@ -22,7 +18,7 @@ runs:
           echo "DFX restored from cache"
         else
           echo "DFX not restored from cache, running install script:"
-          DFX_VERSION=${{ env.dfx_version }} sh -ci "$(curl -fsSL https://sdk.dfinity.org/install.sh)"
+          DFX_VERSION=0.14.2 sh -ci "$(curl -fsSL https://sdk.dfinity.org/install.sh)"
         fi
         echo "DFX version"
         dfx --version
diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
index 3735a01c..e7067dd1 100644
--- a/.github/workflows/pull-request.yml
+++ b/.github/workflows/pull-request.yml
@@ -48,6 +48,9 @@ jobs:
       - name: Build NPM packages
         run: pnpm build
 
+      - name: Test NPM packages
+        run: pnpm test
+
       - name: Test Cargo crates
         run: cargo test
 
diff --git a/Cargo.toml b/Cargo.toml
index 726575fe..56e4e7b8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,7 +11,8 @@ members = [
 # these projects need wasm32-unknown-unknown as their target
 exclude = [
     "examples/certified-counter/src/backend",
-    "packages/ic-response-verification-wasm"
+    "packages/ic-response-verification-wasm",
+    "packages/ic-certification-test-utils-wasm",
 ]
 
 [profile.release]
diff --git a/README.md b/README.md
index 2a705dee..38541272 100644
--- a/README.md
+++ b/README.md
@@ -57,5 +57,7 @@ See [Conventional commits](https://www.conventionalcommits.org/en/v1.0.0/) for m
 | Project                             | Command                                                     | Description                                |
 | ----------------------------------- | ----------------------------------------------------------- | ------------------------------------------ |
 | All                                 | `pnpm build`                                                | Build all NPM projects                     |
+| `@dfinity/certificate-verification` | `pnpm run --filter @dfinity/certificate-verification build` | Build certificate verification             |
+| `@dfinity/certificate-verification` | `pnpm run --filter @dfinity/certificate-verification test`  | Test certificate verification              |
 | `@dfinity/certification-test-utils` | `pnpm run --filter @dfinity/certification-test-utils build` | Build certification test utils             |
 | `@dfinity/response-verification`    | `pnpm run --filter @dfinity/response-verification build`    | Build the response verification JS library |
diff --git a/examples/certified-counter/src/frontend/src/index.ts b/examples/certified-counter/src/frontend/src/index.ts
index e1d4b11f..a12605bc 100644
--- a/examples/certified-counter/src/frontend/src/index.ts
+++ b/examples/certified-counter/src/frontend/src/index.ts
@@ -33,13 +33,13 @@ buttonElement.addEventListener('click', async event => {
 
   const agent = new HttpAgent();
   await agent.fetchRootKey();
-  const tree = await verifyCertification(
-    Principal.fromText(canisterId),
-    new Uint8Array(certificate).buffer,
-    new Uint8Array(witness).buffer,
-    agent.rootKey,
-    50000,
-  );
+  const tree = await verifyCertification({
+    canisterId: Principal.fromText(canisterId),
+    encodedCertificate: new Uint8Array(certificate).buffer,
+    encodedTree: new Uint8Array(witness).buffer,
+    rootKey: agent.rootKey,
+    maxCertificateTimeOffsetMs: 50000,
+  });
 
   const treeHash = lookup_path(['count'], tree);
   if (!treeHash) {
diff --git a/package.json b/package.json
index bbee6e1e..a8b5a27d 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,8 @@
   "scripts": {
     "build": "pnpm run -r build",
     "format": "prettier --write .",
-    "format:check": "prettier --check ."
+    "format:check": "prettier --check .",
+    "test": "pnpm run -r test"
   },
   "engines": {
     "node": "^18",
diff --git a/packages/certificate-verification-js/README.md b/packages/certificate-verification-js/README.md
index 5100b313..69f51a1e 100644
--- a/packages/certificate-verification-js/README.md
+++ b/packages/certificate-verification-js/README.md
@@ -33,13 +33,13 @@ Check [ic-certified-map](https://github.com/dfinity/cdk-rs/tree/main/library/ic-
 ```javascript
 const { data, certificate, witness } = await canister.get_data();
 
-const tree = await verifyCertification(
-  Principal.fromText(canisterId),
-  new Uint8Array(certificate).buffer,
-  new Uint8Array(witness).buffer,
-  agent.rootKey,
-  50000,
-);
+const tree = await verifyCertification({
+  canisterId: Principal.fromText(canisterId),
+  encodedCertificate: new Uint8Array(certificate).buffer,
+  encodedTree: new Uint8Array(witness).buffer,
+  rootKey: agent.rootKey,
+  maxCertificateTimeOffsetMs: 50000,
+});
 
 const treeDataHash = lookup_path(['count'], tree);
 const responseDataHash = calculateDataHash(data);
diff --git a/packages/certificate-verification-js/package.json b/packages/certificate-verification-js/package.json
index c520ba8f..7805e5b4 100644
--- a/packages/certificate-verification-js/package.json
+++ b/packages/certificate-verification-js/package.json
@@ -30,5 +30,8 @@
     "@dfinity/agent": "~0.15.7",
     "@dfinity/candid": "~0.15.7",
     "@dfinity/principal": "~0.15.7"
+  },
+  "devDependencies": {
+    "@dfinity/certification-test-utils": "workspace:*"
   }
 }
diff --git a/packages/certificate-verification-js/src/index.spec.ts b/packages/certificate-verification-js/src/index.spec.ts
new file mode 100644
index 00000000..7a4ef767
--- /dev/null
+++ b/packages/certificate-verification-js/src/index.spec.ts
@@ -0,0 +1,49 @@
+import { describe, expect, it } from 'vitest';
+import { HashTree, reconstruct, Cbor } from '@dfinity/agent';
+import { CertificateBuilder } from '@dfinity/certification-test-utils';
+import { Principal } from '@dfinity/principal';
+import { createHash, webcrypto } from 'node:crypto';
+import { verifyCertification } from './index';
+
+globalThis.crypto = webcrypto as Crypto;
+
+describe('verifyCertification', () => {
+  it('should verify a valid certificate with delegation', async () => {
+    const userId = '1234';
+
+    const username = 'testuser';
+    const usernameHash = new Uint8Array(
+      createHash('sha256').update(username).digest(),
+    );
+
+    const hashTree: HashTree = [
+      2,
+      new Uint8Array(Buffer.from(userId)),
+      [3, usernameHash],
+    ];
+    const rootHash = await reconstruct(hashTree);
+    const cborEncodedTree = Cbor.encode(hashTree);
+
+    const canisterId = Principal.fromUint8Array(
+      new Uint8Array([0, 0, 0, 0, 0, 0, 0, 1]),
+    );
+    const time = BigInt(Date.now());
+
+    const certificate = new CertificateBuilder(
+      canisterId.toString(),
+      new Uint8Array(rootHash),
+    )
+      .withTime(time)
+      .withDelegation(123n, [{ high: 10, low: 0 }])
+      .build();
+
+    const decodedHashTree = await verifyCertification({
+      canisterId,
+      encodedCertificate: certificate.cborEncodedCertificate,
+      encodedTree: cborEncodedTree,
+      maxCertificateTimeOffsetMs: 5000,
+      rootKey: certificate.rootKey,
+    });
+    expect(decodedHashTree).toEqual(hashTree);
+  });
+});
diff --git a/packages/certificate-verification-js/src/index.ts b/packages/certificate-verification-js/src/index.ts
index acebf14a..66bc930a 100644
--- a/packages/certificate-verification-js/src/index.ts
+++ b/packages/certificate-verification-js/src/index.ts
@@ -9,13 +9,21 @@ import { Principal } from '@dfinity/principal';
 import { PipeArrayBuffer, lebDecode } from '@dfinity/candid';
 import { CertificateTimeError, CertificateVerificationError } from './error';
 
-export async function verifyCertification(
-  canisterId: Principal,
-  encodedCertificate: ArrayBuffer,
-  encodedTree: ArrayBuffer,
-  rootKey: ArrayBuffer,
-  maxCertificateTimeOffsetMs: number,
-): Promise<HashTree> {
+export interface CertificationParams {
+  canisterId: Principal;
+  encodedCertificate: ArrayBuffer;
+  encodedTree: ArrayBuffer;
+  rootKey: ArrayBuffer;
+  maxCertificateTimeOffsetMs: number;
+}
+
+export async function verifyCertification({
+  canisterId,
+  encodedCertificate,
+  encodedTree,
+  rootKey,
+  maxCertificateTimeOffsetMs,
+}: CertificationParams): Promise<HashTree> {
   const certificate = await Certificate.create({
     certificate: encodedCertificate,
     canisterId,
diff --git a/packages/ic-certification-test-utils-wasm/Cargo.lock b/packages/ic-certification-test-utils-wasm/Cargo.lock
new file mode 100644
index 00000000..7fee5fcb
--- /dev/null
+++ b/packages/ic-certification-test-utils-wasm/Cargo.lock
@@ -0,0 +1,2298 @@
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+ "windows_aarch64_gnullvm",
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_gnullvm",
+ "windows_x86_64_msvc",
+]
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+dependencies = [
+ "zeroize_derive",
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+
+[[package]]
+name = "zeroize_derive"
+version = "1.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ce36e65b0d2999d2aafac989fb249189a141aee1f53c612c1f37d72631959f69"
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+ "proc-macro2",
+ "quote",
+ "syn 2.0.26",
+]
diff --git a/packages/ic-certification-test-utils-wasm/Cargo.toml b/packages/ic-certification-test-utils-wasm/Cargo.toml
new file mode 100644
index 00000000..f534e6e0
--- /dev/null
+++ b/packages/ic-certification-test-utils-wasm/Cargo.toml
@@ -0,0 +1,37 @@
+[package]
+name = "ic-certification-test-utils-wasm"
+description = "Utilities for testing applications that work with Internet Computer certification"
+version = "0.3.0"
+authors = ["DFINITY Stiftung"]
+license = "Apache-2.0"
+edition = "2021"
+include = ["src", "Cargo.toml", "README.md"]
+
+[features]
+debug = []
+
+[lib]
+crate-type = ["cdylib", "rlib"]
+
+[dependencies]
+leb128 = "0.2.5"
+thiserror = "1.0.43"
+wasm-bindgen = "0.2.83"
+js-sys = "0.3.64"
+console_error_panic_hook = "0.1.7"
+wasm-bindgen-console-logger = "0.1.1"
+log = "0.4.17"
+serde = { version = "1.0", features = ["derive"] }
+serde-wasm-bindgen = "0.4"
+serde_cbor = "0.11.2"
+
+ic-types = { git = "https://github.com/dfinity/ic" }
+ic-crypto-tree-hash = { git = "https://github.com/dfinity/ic" }
+ic-crypto-internal-threshold-sig-bls12381 = { git = "https://github.com/dfinity/ic" }
+ic-crypto-internal-seed = { git = "https://github.com/dfinity/ic" }
+ic-crypto-internal-types = { git = "https://github.com/dfinity/ic" }
+
+# https://github.com/rust-random/rand#wasm-support
+# https://docs.rs/getrandom/latest/getrandom/#webassembly-support
+rand = "0.8.5"
+getrandom = { version = "0.2.8", features = ["js"] }
diff --git a/packages/ic-certification-test-utils-wasm/LICENSE b/packages/ic-certification-test-utils-wasm/LICENSE
new file mode 100644
index 00000000..274d16b7
--- /dev/null
+++ b/packages/ic-certification-test-utils-wasm/LICENSE
@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
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+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
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+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
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+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
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+      file or class name and description of purpose be included on the
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+   Copyright 2023 DFINITY Foundation
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/packages/ic-certification-test-utils-wasm/README.md b/packages/ic-certification-test-utils-wasm/README.md
new file mode 100644
index 00000000..d6536462
--- /dev/null
+++ b/packages/ic-certification-test-utils-wasm/README.md
@@ -0,0 +1 @@
+# Certification Test Utils
diff --git a/packages/ic-certification-test-utils-wasm/package.json b/packages/ic-certification-test-utils-wasm/package.json
new file mode 100644
index 00000000..fd7ab2da
--- /dev/null
+++ b/packages/ic-certification-test-utils-wasm/package.json
@@ -0,0 +1,25 @@
+{
+  "name": "@dfinity/certification-test-utils",
+  "description": "Utilities for testing applications that work with Internet Computer certification",
+  "version": "0.3.0",
+  "author": "DFINITY Stiftung",
+  "license": "Apache-2.0",
+  "repository": "github:dfinity/response-verification",
+  "bugs": "https://github.com/dfinity/response-verification/issues",
+  "keywords": [
+    "internet-computer",
+    "icp",
+    "dfinity",
+    "certification",
+    "test-utils"
+  ],
+  "files": [
+    "dist"
+  ],
+  "main": "./dist/nodejs/nodejs.js",
+  "browser": "./dist/web/web.js",
+  "types": "./dist/web/web.d.ts",
+  "scripts": {
+    "build": "../../scripts/package.sh . ./dist"
+  }
+}
diff --git a/packages/ic-certification-test-utils-wasm/src/certificate.rs b/packages/ic-certification-test-utils-wasm/src/certificate.rs
new file mode 100644
index 00000000..cd3ded25
--- /dev/null
+++ b/packages/ic-certification-test-utils-wasm/src/certificate.rs
@@ -0,0 +1,36 @@
+use crate::{encoding::serialize_to_cbor, error::CertificationTestResult};
+use ic_crypto_tree_hash::{flatmap, Label, LabeledTree};
+use ic_types::{CanisterId, SubnetId};
+
+pub(crate) fn create_certificate_tree(
+    canister_id: &CanisterId,
+    certified_data: &[u8],
+    encoded_time: &[u8],
+) -> LabeledTree<Vec<u8>> {
+    LabeledTree::SubTree(flatmap![
+        Label::from("canister") => LabeledTree::SubTree(flatmap![
+            Label::from(canister_id.get_ref().to_vec()) => LabeledTree::SubTree(flatmap![
+                Label::from("certified_data") => LabeledTree::Leaf(certified_data.to_vec()),
+            ])
+        ]),
+        Label::from("time") => LabeledTree::Leaf(encoded_time.to_vec())])
+}
+
+pub(crate) fn create_delegation_tree(
+    delegatee_public_key: &[u8],
+    encoded_time: &[u8],
+    subnet_id: &SubnetId,
+    canister_ranges: &[(CanisterId, CanisterId)],
+) -> CertificationTestResult<LabeledTree<Vec<u8>>> {
+    let canister_ranges = serialize_to_cbor(&canister_ranges.to_vec());
+
+    Ok(LabeledTree::SubTree(flatmap![
+        Label::from("subnet") => LabeledTree::SubTree(flatmap![
+            Label::from(subnet_id.get_ref().to_vec()) => LabeledTree::SubTree(flatmap![
+                Label::from("canister_ranges") => LabeledTree::Leaf(canister_ranges),
+                Label::from("public_key") => LabeledTree::Leaf(delegatee_public_key.to_vec()),
+            ])
+        ]),
+        Label::from("time") => LabeledTree::Leaf(encoded_time.to_vec())
+    ]))
+}
diff --git a/packages/ic-certification-test-utils-wasm/src/certificate_builder.rs b/packages/ic-certification-test-utils-wasm/src/certificate_builder.rs
new file mode 100644
index 00000000..d53237bd
--- /dev/null
+++ b/packages/ic-certification-test-utils-wasm/src/certificate_builder.rs
@@ -0,0 +1,195 @@
+use crate::{
+    certificate::{create_certificate_tree, create_delegation_tree},
+    encoding::{leb_encode_timestamp, serialize_to_cbor},
+    error::{CertificationTestError, CertificationTestResult},
+    signature::{generate_keypair, get_tree_signature, KeyPair},
+    tree::get_mixed_hash_tree,
+};
+use ic_crypto_tree_hash::{LabeledTree, MixedHashTree};
+use ic_types::{
+    messages::{Blob, Certificate, CertificateDelegation},
+    CanisterId, PrincipalId, SubnetId,
+};
+use serde::{Deserialize, Serialize};
+use std::str::FromStr;
+use wasm_bindgen::prelude::*;
+
+const DEFAULT_CERTIFICATE_TIME: u128 = 1651142233000005031;
+
+#[wasm_bindgen(inspectable, getter_with_clone)]
+#[derive(Debug, Clone)]
+pub struct CertificateData {
+    #[wasm_bindgen]
+    pub certificate: JsValue,
+
+    #[wasm_bindgen(js_name = rootKey)]
+    pub root_key: Vec<u8>,
+
+    #[wasm_bindgen(js_name = cborEncodedCertificate)]
+    pub cbor_encoded_certificate: Vec<u8>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct CanisterIdRange {
+    pub low: u64,
+    pub high: u64,
+}
+
+#[derive(Debug, Clone)]
+struct SubnetData {
+    subnet_id: SubnetId,
+    canister_id_ranges: Vec<(CanisterId, CanisterId)>,
+}
+
+#[derive(Debug, Clone)]
+struct CanisterData {
+    canister_id: CanisterId,
+    certified_data: Vec<u8>,
+}
+
+#[wasm_bindgen(inspectable, getter_with_clone)]
+#[derive(Debug, Clone)]
+pub struct CertificateBuilder {
+    time: Option<u128>,
+    canister: CanisterData,
+    subnet: Option<SubnetData>,
+}
+
+#[wasm_bindgen]
+impl CertificateBuilder {
+    #[wasm_bindgen(constructor)]
+    pub fn new(
+        canister_id: &str,
+        certified_data: &[u8],
+    ) -> CertificationTestResult<CertificateBuilder> {
+        console_error_panic_hook::set_once();
+        log::set_logger(&wasm_bindgen_console_logger::DEFAULT_LOGGER).unwrap();
+        log::set_max_level(log::LevelFilter::Info);
+
+        let canister_id = CanisterId::from_str(canister_id)
+            .map_err(|_| CertificationTestError::CanisterIdParsingFailed)?;
+
+        Ok(CertificateBuilder {
+            time: None,
+            canister: CanisterData {
+                canister_id,
+                certified_data: certified_data.to_vec(),
+            },
+            subnet: None,
+        })
+    }
+
+    #[wasm_bindgen(js_name = withDelegation)]
+    pub fn with_delegation(
+        mut self,
+        subnet_id: u64,
+        canister_id_ranges: Vec<JsValue>,
+    ) -> CertificationTestResult<CertificateBuilder> {
+        let canister_id_ranges = canister_id_ranges
+            .into_iter()
+            .map(|v| serde_wasm_bindgen::from_value::<CanisterIdRange>(v))
+            .map(|v| v.map(|v| (CanisterId::from_u64(v.low), CanisterId::from_u64(v.high))))
+            .collect::<Result<_, _>>()?;
+
+        let subnet_id = SubnetId::from(PrincipalId::new_subnet_test_id(subnet_id));
+
+        self.subnet = Some(SubnetData {
+            subnet_id,
+            canister_id_ranges,
+        });
+
+        Ok(self)
+    }
+
+    #[wasm_bindgen(js_name = withTime)]
+    pub fn with_time(mut self, time: u64) -> Self {
+        self.time = Some(u128::from(time) * 1_000_000);
+
+        self
+    }
+
+    pub fn build(self) -> CertificationTestResult<CertificateData> {
+        let time = self.time.unwrap_or(DEFAULT_CERTIFICATE_TIME);
+        let encoded_time = leb_encode_timestamp(time)?;
+
+        let tree = create_certificate_tree(
+            &self.canister.canister_id,
+            &self.canister.certified_data,
+            &encoded_time,
+        );
+        let (keypair, tree, signature) = build_certificate(&tree)?;
+        let delegation = None;
+        let delegation_data = self.build_delegation(&keypair, &encoded_time)?;
+
+        if let Some((delegation, keypair)) = delegation_data {
+            let certificate = Certificate {
+                tree,
+                signature,
+                delegation: Some(delegation),
+            };
+            let certificate_json = serde_wasm_bindgen::to_value(&certificate)?;
+            let certificate_cbor = serialize_to_cbor(&certificate);
+
+            return Ok(CertificateData {
+                certificate: certificate_json,
+                root_key: keypair.public_key,
+                cbor_encoded_certificate: certificate_cbor,
+            });
+        };
+
+        let certificate = Certificate {
+            tree,
+            signature,
+            delegation,
+        };
+        let certificate_json = serde_wasm_bindgen::to_value(&certificate)?;
+        let certificate_cbor = serialize_to_cbor(&certificate);
+
+        return Ok(CertificateData {
+            certificate: certificate_json,
+            root_key: keypair.public_key,
+            cbor_encoded_certificate: certificate_cbor,
+        });
+    }
+
+    fn build_delegation(
+        self,
+        delegatee_keypair: &KeyPair,
+        encoded_time: &[u8],
+    ) -> CertificationTestResult<Option<(CertificateDelegation, KeyPair)>> {
+        if let Some(subnet) = self.subnet {
+            let tree = create_delegation_tree(
+                &delegatee_keypair.public_key,
+                encoded_time,
+                &subnet.subnet_id,
+                &subnet.canister_id_ranges,
+            )?;
+            let (keypair, tree, signature) = build_certificate(&tree)?;
+            let certificate = Certificate {
+                tree,
+                signature,
+                delegation: None,
+            };
+
+            return Ok(Some((
+                CertificateDelegation {
+                    certificate: Blob(serialize_to_cbor(&certificate)),
+                    subnet_id: Blob(subnet.subnet_id.get().to_vec()),
+                },
+                keypair,
+            )));
+        }
+
+        Ok(None)
+    }
+}
+
+fn build_certificate(
+    tree: &LabeledTree<Vec<u8>>,
+) -> CertificationTestResult<(KeyPair, MixedHashTree, Blob)> {
+    let keypair = generate_keypair()?;
+    let tree = get_mixed_hash_tree(&tree)?;
+    let signature = get_tree_signature(&tree, &keypair.private_key)?;
+
+    Ok((keypair, tree, signature))
+}
diff --git a/packages/ic-certification-test-utils-wasm/src/encoding.rs b/packages/ic-certification-test-utils-wasm/src/encoding.rs
new file mode 100644
index 00000000..726f4e6f
--- /dev/null
+++ b/packages/ic-certification-test-utils-wasm/src/encoding.rs
@@ -0,0 +1,18 @@
+use crate::error::{CertificationTestError, CertificationTestResult};
+use serde::Serialize;
+
+pub(crate) fn serialize_to_cbor<T: Serialize>(payload: &T) -> Vec<u8> {
+    let mut serializer = serde_cbor::Serializer::new(Vec::new());
+    serializer.self_describe().unwrap();
+    payload.serialize(&mut serializer).unwrap();
+    serializer.into_inner()
+}
+
+pub(crate) fn leb_encode_timestamp(timestamp: u128) -> CertificationTestResult<Vec<u8>> {
+    let mut encoded_time = vec![];
+
+    leb128::write::unsigned(&mut encoded_time, timestamp as u64)
+        .map_err(|_| CertificationTestError::TimestampLebEncodingFailed)?;
+
+    Ok(encoded_time)
+}
diff --git a/packages/ic-certification-test-utils-wasm/src/error.rs b/packages/ic-certification-test-utils-wasm/src/error.rs
new file mode 100644
index 00000000..9e864131
--- /dev/null
+++ b/packages/ic-certification-test-utils-wasm/src/error.rs
@@ -0,0 +1,55 @@
+use ic_crypto_internal_threshold_sig_bls12381::api::threshold_sign_error::ClibThresholdSignError;
+use ic_crypto_tree_hash::TreeHashError;
+use thiserror::Error;
+use wasm_bindgen::prelude::*;
+
+#[wasm_bindgen]
+#[derive(Error, Debug)]
+pub enum CertificationTestError {
+    #[error("could not hash tree")]
+    UnableToHashTree,
+
+    #[error("could not generate witness")]
+    WitnessGenerationFailed,
+
+    #[error("could not sign message")]
+    ThresholdSigningFailed,
+
+    #[error("could not serialize certificate to cbor")]
+    CertificateSerializationFailed,
+
+    #[error("could not leb encode timestamp")]
+    TimestampLebEncodingFailed,
+
+    #[error("could not parse canister ID")]
+    CanisterIdParsingFailed,
+
+    #[error("could not encode public key")]
+    PublicKeyEncodingFailed
+}
+
+impl From<TreeHashError> for CertificationTestError {
+    fn from(_: TreeHashError) -> Self {
+        CertificationTestError::UnableToHashTree
+    }
+}
+
+impl From<ClibThresholdSignError> for CertificationTestError {
+    fn from(_: ClibThresholdSignError) -> Self {
+        CertificationTestError::ThresholdSigningFailed
+    }
+}
+
+impl From<serde_wasm_bindgen::Error> for CertificationTestError {
+    fn from(_: serde_wasm_bindgen::Error) -> Self {
+        CertificationTestError::CertificateSerializationFailed
+    }
+}
+
+impl Into<JsValue> for CertificationTestError {
+    fn into(self) -> JsValue {
+        JsValue::from_str(&format!("{}", self))
+    }
+}
+
+pub type CertificationTestResult<T = ()> = Result<T, CertificationTestError>;
diff --git a/packages/ic-certification-test-utils-wasm/src/lib.rs b/packages/ic-certification-test-utils-wasm/src/lib.rs
new file mode 100644
index 00000000..dedf163e
--- /dev/null
+++ b/packages/ic-certification-test-utils-wasm/src/lib.rs
@@ -0,0 +1,7 @@
+pub mod certificate_builder;
+
+mod certificate;
+mod encoding;
+mod error;
+mod signature;
+mod tree;
diff --git a/packages/ic-certification-test-utils-wasm/src/signature.rs b/packages/ic-certification-test-utils-wasm/src/signature.rs
new file mode 100644
index 00000000..53385128
--- /dev/null
+++ b/packages/ic-certification-test-utils-wasm/src/signature.rs
@@ -0,0 +1,69 @@
+use crate::error::{CertificationTestError, CertificationTestResult};
+use ic_crypto_internal_seed::Seed;
+use ic_crypto_internal_threshold_sig_bls12381::{
+    api::{combined_public_key, generate_threshold_key, public_key_to_der, sign_message},
+    types::SecretKeyBytes,
+};
+use ic_crypto_internal_types::sign::threshold_sig::public_key::{
+    bls12_381::PublicKeyBytes, CspThresholdSigPublicKey,
+};
+use ic_crypto_tree_hash::MixedHashTree;
+use ic_types::{
+    consensus::certification::CertificationContent,
+    crypto::{
+        threshold_sig::ThresholdSigPublicKey, CombinedThresholdSig, CombinedThresholdSigOf,
+        CryptoHash, Signable,
+    },
+    messages::Blob,
+    CryptoHashOfPartialState, NumberOfNodes,
+};
+use rand::{thread_rng, Rng};
+
+#[derive(Debug, Clone)]
+pub(crate) struct KeyPair {
+    pub(crate) public_key: Vec<u8>,
+    pub(crate) private_key: SecretKeyBytes,
+}
+
+pub(crate) fn generate_keypair() -> CertificationTestResult<KeyPair> {
+    let mut seed: [u8; 32] = [0; 32];
+    thread_rng().fill(&mut seed);
+
+    let (public_coefficients, secret_key_bytes) = generate_threshold_key(
+        Seed::from_bytes(&seed),
+        NumberOfNodes::new(1),
+        NumberOfNodes::new(1),
+    )
+    .unwrap();
+
+    let private_key = secret_key_bytes.get(0).unwrap().clone();
+    let public_key = ThresholdSigPublicKey::from(CspThresholdSigPublicKey::from(
+        combined_public_key(&public_coefficients).unwrap(),
+    ));
+
+    let public_key = public_key_to_der(PublicKeyBytes(public_key.into_bytes()))
+        .map_err(|_| CertificationTestError::PublicKeyEncodingFailed)?;
+
+    Ok(KeyPair {
+        public_key,
+        private_key,
+    })
+}
+
+pub(crate) fn get_tree_signature(
+    mixed_hash_tree: &MixedHashTree,
+    private_key: &SecretKeyBytes,
+) -> CertificationTestResult<Blob> {
+    let root_hash = CryptoHashOfPartialState::from(CryptoHash(mixed_hash_tree.digest().to_vec()));
+
+    let signature = sign_message(
+        &CertificationContent::new(root_hash)
+            .as_signed_bytes()
+            .as_slice(),
+        private_key,
+    )?;
+    let signature: CombinedThresholdSigOf<CombinedThresholdSig> =
+        CombinedThresholdSigOf::from(CombinedThresholdSig(signature.0.to_vec()));
+
+    Ok(Blob(signature.get().0))
+}
diff --git a/packages/ic-certification-test-utils-wasm/src/tree.rs b/packages/ic-certification-test-utils-wasm/src/tree.rs
new file mode 100644
index 00000000..07cbc664
--- /dev/null
+++ b/packages/ic-certification-test-utils-wasm/src/tree.rs
@@ -0,0 +1,37 @@
+use crate::error::{CertificationTestError, CertificationTestResult};
+use ic_crypto_tree_hash::{
+    HashTreeBuilder, HashTreeBuilderImpl, LabeledTree, MixedHashTree, WitnessGenerator,
+};
+
+pub(crate) fn get_mixed_hash_tree(
+    tree: &LabeledTree<Vec<u8>>,
+) -> CertificationTestResult<MixedHashTree> {
+    let mut hash_tree_builder = HashTreeBuilderImpl::new();
+    hash_full_tree(&mut hash_tree_builder, tree);
+
+    let witness_gen = hash_tree_builder
+        .witness_generator()
+        .ok_or(CertificationTestError::WitnessGenerationFailed)?;
+
+    let mixed_hash_tree = witness_gen.mixed_hash_tree(&tree)?;
+
+    Ok(mixed_hash_tree)
+}
+
+fn hash_full_tree(hash_tree_builder: &mut HashTreeBuilderImpl, tree: &LabeledTree<Vec<u8>>) {
+    match tree {
+        LabeledTree::Leaf(bytes) => {
+            hash_tree_builder.start_leaf();
+            hash_tree_builder.write_leaf(&bytes[..]);
+            hash_tree_builder.finish_leaf();
+        }
+        LabeledTree::SubTree(map) => {
+            hash_tree_builder.start_subtree();
+            for (l, child) in map.iter() {
+                hash_tree_builder.new_edge(l.clone());
+                hash_full_tree(hash_tree_builder, child);
+            }
+            hash_tree_builder.finish_subtree();
+        }
+    }
+}
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index c83ebbf4..13dd422a 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -1,22 +1,18 @@
 lockfileVersion: '6.0'
 
-settings:
-  autoInstallPeers: true
-  excludeLinksFromLockfile: false
-
 importers:
 
   .:
     devDependencies:
       '@dfinity/agent':
         specifier: ~0.15.7
-        version: 0.15.7(@dfinity/candid@0.15.7)(@dfinity/principal@0.15.7)(@types/node@20.3.1)(typescript@5.1.3)
+        version: 0.15.7(@dfinity/candid@0.15.7)(@dfinity/principal@0.15.7)(@types/node@20.4.2)(typescript@5.1.3)
       '@dfinity/candid':
         specifier: ~0.15.7
-        version: 0.15.7(@types/node@20.3.1)(typescript@5.1.3)
+        version: 0.15.7(@types/node@20.4.2)(typescript@5.1.3)
       '@dfinity/principal':
         specifier: ~0.15.7
-        version: 0.15.7(@types/node@20.3.1)(typescript@5.1.3)
+        version: 0.15.7(@types/node@20.4.2)(typescript@5.1.3)
       prettier:
         specifier: ^2.8.8
         version: 2.8.8
@@ -25,7 +21,7 @@ importers:
         version: 5.1.3
       vite:
         specifier: ^4.3.9
-        version: 4.3.9(@types/node@20.3.1)
+        version: 4.3.9(@types/node@20.4.2)
       vite-plugin-checker:
         specifier: ^0.6.1
         version: 0.6.1(typescript@5.1.3)(vite@4.3.9)
@@ -41,13 +37,13 @@ importers:
     devDependencies:
       '@dfinity/agent':
         specifier: 0.15.7
-        version: 0.15.7(@dfinity/candid@0.15.7)(@dfinity/principal@0.15.7)(@types/node@20.3.1)(typescript@5.1.3)
+        version: 0.15.7(@dfinity/candid@0.15.7)(@dfinity/principal@0.15.7)(@types/node@20.4.2)(typescript@5.1.3)
       '@dfinity/candid':
         specifier: 0.15.7
-        version: 0.15.7(@types/node@20.3.1)(typescript@5.1.3)
+        version: 0.15.7(@types/node@20.4.2)(typescript@5.1.3)
       '@dfinity/principal':
         specifier: 0.15.7
-        version: 0.15.7(@types/node@20.3.1)(typescript@5.1.3)
+        version: 0.15.7(@types/node@20.4.2)(typescript@5.1.3)
       assert:
         specifier: 2.0.0
         version: 2.0.0
@@ -114,7 +110,7 @@ importers:
     dependencies:
       '@dfinity/principal':
         specifier: ~0.15.7
-        version: 0.15.7(@types/node@20.3.1)(typescript@4.8.4)
+        version: 0.15.7(@types/node@20.4.2)(typescript@4.8.4)
       '@dfinity/response-verification':
         specifier: workspace:*
         version: link:../../packages/ic-response-verification-wasm
@@ -130,7 +126,7 @@ importers:
         version: 9.4.1(typescript@4.8.4)(webpack@5.76.0)
       ts-node:
         specifier: ^10.9.1
-        version: 10.9.1(@types/node@20.3.1)(typescript@4.8.4)
+        version: 10.9.1(@types/node@20.4.2)(typescript@4.8.4)
       typescript:
         specifier: ^4.8.4
         version: 4.8.4
@@ -148,7 +144,7 @@ importers:
     dependencies:
       '@dfinity/principal':
         specifier: ~0.15.7
-        version: 0.15.7(@types/node@20.3.1)(typescript@4.8.4)
+        version: 0.15.7(@types/node@20.4.2)(typescript@4.8.4)
       '@dfinity/response-verification':
         specifier: workspace:*
         version: link:../../packages/ic-response-verification-wasm
@@ -164,7 +160,7 @@ importers:
         version: 9.4.1(typescript@4.8.4)(webpack@5.76.0)
       ts-node:
         specifier: ^10.9.1
-        version: 10.9.1(@types/node@20.3.1)(typescript@4.8.4)
+        version: 10.9.1(@types/node@20.4.2)(typescript@4.8.4)
       typescript:
         specifier: ^4.8.4
         version: 4.8.4
@@ -182,13 +178,19 @@ importers:
     dependencies:
       '@dfinity/agent':
         specifier: ~0.15.7
-        version: 0.15.7(@dfinity/candid@0.15.7)(@dfinity/principal@0.15.7)(@types/node@20.3.1)(typescript@5.1.3)
+        version: 0.15.7(@dfinity/candid@0.15.7)(@dfinity/principal@0.15.7)(@types/node@20.4.2)(typescript@5.1.3)
       '@dfinity/candid':
         specifier: ~0.15.7
-        version: 0.15.7(@types/node@20.3.1)(typescript@5.1.3)
+        version: 0.15.7(@types/node@20.4.2)(typescript@5.1.3)
       '@dfinity/principal':
         specifier: ~0.15.7
-        version: 0.15.7(@types/node@20.3.1)(typescript@5.1.3)
+        version: 0.15.7(@types/node@20.4.2)(typescript@5.1.3)
+    devDependencies:
+      '@dfinity/certification-test-utils':
+        specifier: workspace:*
+        version: link:../ic-certification-test-utils-wasm
+
+  packages/ic-certification-test-utils-wasm: {}
 
   packages/ic-response-verification-tests:
     dependencies:
@@ -231,7 +233,7 @@ importers:
         version: 5.76.0(webpack-cli@4.10.0)
       webpack-cli:
         specifier: ^4.10.0
-        version: 4.10.0(webpack@5.76.0)
+        version: 4.10.0(webpack-dev-server@4.11.1)(webpack@5.76.0)
 
   packages/ic-response-verification-wasm: {}
 
@@ -264,20 +266,20 @@ packages:
     dependencies:
       '@jridgewell/trace-mapping': 0.3.9
 
-  /@dfinity/agent@0.15.7(@dfinity/candid@0.15.7)(@dfinity/principal@0.15.7)(@types/node@20.3.1)(typescript@5.1.3):
+  /@dfinity/agent@0.15.7(@dfinity/candid@0.15.7)(@dfinity/principal@0.15.7)(@types/node@20.4.2)(typescript@5.1.3):
     resolution: {integrity: sha512-w34yvlUTpPBG8nLOD0t/ao3k2xonOFq4QGvfJ1HiS/nIggdza/3xC3nLBszGrjVYWj1jqu8BLFvQXCAeWin75A==}
     peerDependencies:
       '@dfinity/candid': ^0.15.7
       '@dfinity/principal': ^0.15.7
     dependencies:
-      '@dfinity/candid': 0.15.7(@types/node@20.3.1)(typescript@5.1.3)
-      '@dfinity/principal': 0.15.7(@types/node@20.3.1)(typescript@5.1.3)
+      '@dfinity/candid': 0.15.7(@types/node@20.4.2)(typescript@5.1.3)
+      '@dfinity/principal': 0.15.7(@types/node@20.4.2)(typescript@5.1.3)
       base64-arraybuffer: 0.2.0
       bignumber.js: 9.1.1
       borc: 2.1.2
       js-sha256: 0.9.0
       simple-cbor: 0.4.1
-      ts-node: 10.9.1(@types/node@20.3.1)(typescript@5.1.3)
+      ts-node: 10.9.1(@types/node@20.4.2)(typescript@5.1.3)
     transitivePeerDependencies:
       - '@swc/core'
       - '@swc/wasm'
@@ -298,10 +300,10 @@ packages:
       simple-cbor: 0.4.1
     dev: false
 
-  /@dfinity/candid@0.15.7(@types/node@20.3.1)(typescript@5.1.3):
+  /@dfinity/candid@0.15.7(@types/node@20.4.2)(typescript@5.1.3):
     resolution: {integrity: sha512-lTcjK/xrSyT7wvUQ2pApG+yklQAwxaofQ04D1IWv0/8gKbY0eUbh8G2w6+CypJ15Hb1CH24ijUj8nWdeX/z3jg==}
     dependencies:
-      ts-node: 10.9.1(@types/node@20.3.1)(typescript@5.1.3)
+      ts-node: 10.9.1(@types/node@20.4.2)(typescript@5.1.3)
     transitivePeerDependencies:
       - '@swc/core'
       - '@swc/wasm'
@@ -324,11 +326,23 @@ packages:
       - typescript
     dev: false
 
-  /@dfinity/principal@0.15.7(@types/node@20.3.1)(typescript@5.1.3):
+  /@dfinity/principal@0.15.7(@types/node@20.4.2)(typescript@4.8.4):
     resolution: {integrity: sha512-6/AkYzpGEH6Jw/0+B/EeeQn+5u2GDDvRLt1kQPhIG4txQYFnOy04H3VvyrymmfAj6/CXUgrOrux6OxgYSLYVJg==}
     dependencies:
       js-sha256: 0.9.0
-      ts-node: 10.9.1(@types/node@20.3.1)(typescript@5.1.3)
+      ts-node: 10.9.1(@types/node@20.4.2)(typescript@4.8.4)
+    transitivePeerDependencies:
+      - '@swc/core'
+      - '@swc/wasm'
+      - '@types/node'
+      - typescript
+    dev: false
+
+  /@dfinity/principal@0.15.7(@types/node@20.4.2)(typescript@5.1.3):
+    resolution: {integrity: sha512-6/AkYzpGEH6Jw/0+B/EeeQn+5u2GDDvRLt1kQPhIG4txQYFnOy04H3VvyrymmfAj6/CXUgrOrux6OxgYSLYVJg==}
+    dependencies:
+      js-sha256: 0.9.0
+      ts-node: 10.9.1(@types/node@20.4.2)(typescript@5.1.3)
     transitivePeerDependencies:
       - '@swc/core'
       - '@swc/wasm'
@@ -635,13 +649,13 @@ packages:
     resolution: {integrity: sha512-ALYone6pm6QmwZoAgeyNksccT9Q4AWZQ6PvfwR37GT6r6FWUPguq6sUmNGSMV2Wr761oQoBxwGGa6DR5o1DC9g==}
     dependencies:
       '@types/connect': 3.4.35
-      '@types/node': 20.3.1
+      '@types/node': 20.4.2
     dev: true
 
   /@types/bonjour@3.5.10:
     resolution: {integrity: sha512-p7ienRMiS41Nu2/igbJxxLDWrSZ0WxM8UQgCeO9KhoVF7cOVFkrKsiDr1EsJIla8vV3oEEjGcz11jc5yimhzZw==}
     dependencies:
-      '@types/node': 20.3.1
+      '@types/node': 20.4.2
     dev: true
 
   /@types/chai-subset@1.3.3:
@@ -658,13 +672,13 @@ packages:
     resolution: {integrity: sha512-4x5FkPpLipqwthjPsF7ZRbOv3uoLUFkTA9G9v583qi4pACvq0uTELrB8OLUzPWUI4IJIyvM85vzkV1nyiI2Lig==}
     dependencies:
       '@types/express-serve-static-core': 4.17.35
-      '@types/node': 20.3.1
+      '@types/node': 20.4.2
     dev: true
 
   /@types/connect@3.4.35:
     resolution: {integrity: sha512-cdeYyv4KWoEgpBISTxWvqYsVy444DOqehiF3fM3ne10AmJ62RSyNkUnxMJXHQWRQQX2eR94m5y1IZyDwBjV9FQ==}
     dependencies:
-      '@types/node': 20.3.1
+      '@types/node': 20.4.2
     dev: true
 
   /@types/eslint-scope@3.7.4:
@@ -688,7 +702,7 @@ packages:
   /@types/express-serve-static-core@4.17.35:
     resolution: {integrity: sha512-wALWQwrgiB2AWTT91CB62b6Yt0sNHpznUXeZEcnPU3DRdlDIz74x8Qg1UUYKSVFi+va5vKOLYRBI1bRKiLLKIg==}
     dependencies:
-      '@types/node': 20.3.1
+      '@types/node': 20.4.2
       '@types/qs': 6.9.7
       '@types/range-parser': 1.2.4
       '@types/send': 0.17.1
@@ -714,7 +728,7 @@ packages:
   /@types/http-proxy@1.17.11:
     resolution: {integrity: sha512-HC8G7c1WmaF2ekqpnFq626xd3Zz0uvaqFmBJNRZCGEZCXkvSdJoNFn/8Ygbd9fKNQj8UzLdCETaI0UWPAjK7IA==}
     dependencies:
-      '@types/node': 20.3.1
+      '@types/node': 20.4.2
     dev: true
 
   /@types/isomorphic-fetch@0.0.36:
@@ -736,6 +750,9 @@ packages:
   /@types/node@20.3.1:
     resolution: {integrity: sha512-EhcH/wvidPy1WeML3TtYFGR83UzjxeWRen9V402T8aUGYsCHOmfoisV3ZSg03gAFIbLq8TnWOJ0f4cALtnSEUg==}
 
+  /@types/node@20.4.2:
+    resolution: {integrity: sha512-Dd0BYtWgnWJKwO1jkmTrzofjK2QXXcai0dmtzvIBhcA+RsG5h8R3xlyta0kGOZRNfL9GuRtb1knmPEhQrePCEw==}
+
   /@types/qs@6.9.7:
     resolution: {integrity: sha512-FGa1F62FT09qcrueBA6qYTrJPVDzah9a+493+o2PCXsesWHIn27G98TsSMs3WPNbZIEj4+VJf6saSFpvD+3Zsw==}
     dev: true
@@ -752,7 +769,7 @@ packages:
     resolution: {integrity: sha512-Cwo8LE/0rnvX7kIIa3QHCkcuF21c05Ayb0ZfxPiv0W8VRiZiNW/WuRupHKpqqGVGf7SUA44QSOUKaEd9lIrd/Q==}
     dependencies:
       '@types/mime': 1.3.2
-      '@types/node': 20.3.1
+      '@types/node': 20.4.2
     dev: true
 
   /@types/serve-index@1.9.1:
@@ -766,19 +783,19 @@ packages:
     dependencies:
       '@types/http-errors': 2.0.1
       '@types/mime': 3.0.1
-      '@types/node': 20.3.1
+      '@types/node': 20.4.2
     dev: true
 
   /@types/sockjs@0.3.33:
     resolution: {integrity: sha512-f0KEEe05NvUnat+boPTZ0dgaLZ4SfSouXUgv5noUiefG2ajgKjmETo9ZJyuqsl7dfl2aHlLJUiki6B4ZYldiiw==}
     dependencies:
-      '@types/node': 20.3.1
+      '@types/node': 20.4.2
     dev: true
 
   /@types/ws@8.5.5:
     resolution: {integrity: sha512-lwhs8hktwxSjf9UaZ9tG5M03PGogvFaH8gUgLNbN9HKIg0dvv6q+gkSuJ8HN4/VbyxkuLzCjlN7GquQ0gUJfIg==}
     dependencies:
-      '@types/node': 20.3.1
+      '@types/node': 20.4.2
     dev: true
 
   /@vitest/expect@0.32.2:
@@ -945,18 +962,6 @@ packages:
       webpack-cli: 4.10.0(webpack-dev-server@4.11.1)(webpack@5.76.0)
     dev: true
 
-  /@webpack-cli/serve@1.7.0(webpack-cli@4.10.0):
-    resolution: {integrity: sha512-oxnCNGj88fL+xzV+dacXs44HcDwf1ovs3AuEzvP7mqXw7fQntqIhQ1BRmynh4qEKQSSSRSWVyXRjmTbZIX9V2Q==}
-    peerDependencies:
-      webpack-cli: 4.x.x
-      webpack-dev-server: '*'
-    peerDependenciesMeta:
-      webpack-dev-server:
-        optional: true
-    dependencies:
-      webpack-cli: 4.10.0(webpack@5.76.0)
-    dev: true
-
   /@webpack-cli/serve@1.7.0(webpack-cli@4.10.0)(webpack-dev-server@4.11.1):
     resolution: {integrity: sha512-oxnCNGj88fL+xzV+dacXs44HcDwf1ovs3AuEzvP7mqXw7fQntqIhQ1BRmynh4qEKQSSSRSWVyXRjmTbZIX9V2Q==}
     peerDependencies:
@@ -2422,7 +2427,7 @@ packages:
     resolution: {integrity: sha512-7vuh85V5cdDofPyxn58nrPjBktZo0u9x1g8WtjQol+jZDaE+fhN+cIvTj11GndBnMnyfrUOG1sZQxCdjKh+DKg==}
     engines: {node: '>= 10.13.0'}
     dependencies:
-      '@types/node': 20.3.1
+      '@types/node': 20.4.2
       merge-stream: 2.0.0
       supports-color: 8.1.1
     dev: true
@@ -3561,6 +3566,67 @@ packages:
       typescript: 5.1.3
       v8-compile-cache-lib: 3.0.1
       yn: 3.1.1
+    dev: true
+
+  /ts-node@10.9.1(@types/node@20.4.2)(typescript@4.8.4):
+    resolution: {integrity: sha512-NtVysVPkxxrwFGUUxGYhfux8k78pQB3JqYBXlLRZgdGUqTO5wU/UyHop5p70iEbGhB7q5KmiZiU0Y3KlJrScEw==}
+    hasBin: true
+    peerDependencies:
+      '@swc/core': '>=1.2.50'
+      '@swc/wasm': '>=1.2.50'
+      '@types/node': '*'
+      typescript: '>=2.7'
+    peerDependenciesMeta:
+      '@swc/core':
+        optional: true
+      '@swc/wasm':
+        optional: true
+    dependencies:
+      '@cspotcode/source-map-support': 0.8.1
+      '@tsconfig/node10': 1.0.9
+      '@tsconfig/node12': 1.0.11
+      '@tsconfig/node14': 1.0.3
+      '@tsconfig/node16': 1.0.3
+      '@types/node': 20.4.2
+      acorn: 8.9.0
+      acorn-walk: 8.2.0
+      arg: 4.1.3
+      create-require: 1.1.1
+      diff: 4.0.2
+      make-error: 1.3.6
+      typescript: 4.8.4
+      v8-compile-cache-lib: 3.0.1
+      yn: 3.1.1
+
+  /ts-node@10.9.1(@types/node@20.4.2)(typescript@5.1.3):
+    resolution: {integrity: sha512-NtVysVPkxxrwFGUUxGYhfux8k78pQB3JqYBXlLRZgdGUqTO5wU/UyHop5p70iEbGhB7q5KmiZiU0Y3KlJrScEw==}
+    hasBin: true
+    peerDependencies:
+      '@swc/core': '>=1.2.50'
+      '@swc/wasm': '>=1.2.50'
+      '@types/node': '*'
+      typescript: '>=2.7'
+    peerDependenciesMeta:
+      '@swc/core':
+        optional: true
+      '@swc/wasm':
+        optional: true
+    dependencies:
+      '@cspotcode/source-map-support': 0.8.1
+      '@tsconfig/node10': 1.0.9
+      '@tsconfig/node12': 1.0.11
+      '@tsconfig/node14': 1.0.3
+      '@tsconfig/node16': 1.0.3
+      '@types/node': 20.4.2
+      acorn: 8.9.0
+      acorn-walk: 8.2.0
+      arg: 4.1.3
+      create-require: 1.1.1
+      diff: 4.0.2
+      make-error: 1.3.6
+      typescript: 5.1.3
+      v8-compile-cache-lib: 3.0.1
+      yn: 3.1.1
 
   /tslib@2.5.3:
     resolution: {integrity: sha512-mSxlJJwl3BMEQCUNnxXBU9jP4JBktcEGhURcPR6VQVlnP0FdDEsIaz0C35dXNGLyRfrATNofF0F5p2KPxQgB+w==}
@@ -3672,7 +3738,7 @@ packages:
     engines: {node: '>= 0.8'}
     dev: true
 
-  /vite-node@0.32.2(@types/node@20.3.1):
+  /vite-node@0.32.2(@types/node@20.4.2):
     resolution: {integrity: sha512-dTQ1DCLwl2aEseov7cfQ+kDMNJpM1ebpyMMMwWzBvLbis8Nla/6c9WQcqpPssTwS6Rp/+U6KwlIj8Eapw4bLdA==}
     engines: {node: '>=v14.18.0'}
     hasBin: true
@@ -3682,7 +3748,7 @@ packages:
       mlly: 1.4.0
       pathe: 1.1.1
       picocolors: 1.0.0
-      vite: 4.3.9(@types/node@20.3.1)
+      vite: 4.3.9(@types/node@20.4.2)
     transitivePeerDependencies:
       - '@types/node'
       - less
@@ -3738,14 +3804,14 @@ packages:
       strip-ansi: 6.0.1
       tiny-invariant: 1.3.1
       typescript: 5.1.3
-      vite: 4.3.9(@types/node@20.3.1)
+      vite: 4.3.9(@types/node@20.4.2)
       vscode-languageclient: 7.0.0
       vscode-languageserver: 7.0.0
       vscode-languageserver-textdocument: 1.0.8
       vscode-uri: 3.0.7
     dev: true
 
-  /vite@4.3.9(@types/node@20.3.1):
+  /vite@4.3.9(@types/node@20.4.2):
     resolution: {integrity: sha512-qsTNZjO9NoJNW7KnOrgYwczm0WctJ8m/yqYAMAK9Lxt4SoySUfS5S8ia9K7JHpa3KEeMfyF8LoJ3c5NeBJy6pg==}
     engines: {node: ^14.18.0 || >=16.0.0}
     hasBin: true
@@ -3770,7 +3836,7 @@ packages:
       terser:
         optional: true
     dependencies:
-      '@types/node': 20.3.1
+      '@types/node': 20.4.2
       esbuild: 0.17.19
       postcss: 8.4.24
       rollup: 3.25.3
@@ -3811,7 +3877,7 @@ packages:
     dependencies:
       '@types/chai': 4.3.5
       '@types/chai-subset': 1.3.3
-      '@types/node': 20.3.1
+      '@types/node': 20.4.2
       '@vitest/expect': 0.32.2
       '@vitest/runner': 0.32.2
       '@vitest/snapshot': 0.32.2
@@ -3831,8 +3897,8 @@ packages:
       strip-literal: 1.0.1
       tinybench: 2.5.0
       tinypool: 0.5.0
-      vite: 4.3.9(@types/node@20.3.1)
-      vite-node: 0.32.2(@types/node@20.3.1)
+      vite: 4.3.9(@types/node@20.4.2)
+      vite-node: 0.32.2(@types/node@20.4.2)
       why-is-node-running: 2.2.2
     transitivePeerDependencies:
       - less
@@ -3937,41 +4003,6 @@ packages:
       webpack-merge: 5.9.0
     dev: true
 
-  /webpack-cli@4.10.0(webpack@5.76.0):
-    resolution: {integrity: sha512-NLhDfH/h4O6UOy+0LSso42xvYypClINuMNBVVzX4vX98TmTaTUxwRbXdhucbFMd2qLaCTcLq/PdYrvi8onw90w==}
-    engines: {node: '>=10.13.0'}
-    hasBin: true
-    peerDependencies:
-      '@webpack-cli/generators': '*'
-      '@webpack-cli/migrate': '*'
-      webpack: 4.x.x || 5.x.x
-      webpack-bundle-analyzer: '*'
-      webpack-dev-server: '*'
-    peerDependenciesMeta:
-      '@webpack-cli/generators':
-        optional: true
-      '@webpack-cli/migrate':
-        optional: true
-      webpack-bundle-analyzer:
-        optional: true
-      webpack-dev-server:
-        optional: true
-    dependencies:
-      '@discoveryjs/json-ext': 0.5.7
-      '@webpack-cli/configtest': 1.2.0(webpack-cli@4.10.0)(webpack@5.76.0)
-      '@webpack-cli/info': 1.5.0(webpack-cli@4.10.0)
-      '@webpack-cli/serve': 1.7.0(webpack-cli@4.10.0)
-      colorette: 2.0.20
-      commander: 7.2.0
-      cross-spawn: 7.0.3
-      fastest-levenshtein: 1.0.16
-      import-local: 3.1.0
-      interpret: 2.2.0
-      rechoir: 0.7.1
-      webpack: 5.76.0(webpack-cli@4.10.0)
-      webpack-merge: 5.9.0
-    dev: true
-
   /webpack-dev-middleware@5.3.3(webpack@5.76.0):
     resolution: {integrity: sha512-hj5CYrY0bZLB+eTO+x/j67Pkrquiy7kWepMHmUMoPsmcUaeEnQJqFzHJOyxgWlq746/wUuA64p9ta34Kyb01pA==}
     engines: {node: '>= 12.13.0'}
@@ -4188,3 +4219,7 @@ packages:
     resolution: {integrity: sha512-9bnSc/HEW2uRy67wc+T8UwauLuPJVn28jb+GtJY16iiKWyvmYJRXVT4UamsAEGQfPohgr2q4Tq0sQbQlxTfi1g==}
     engines: {node: '>=12.20'}
     dev: true
+
+settings:
+  autoInstallPeers: true
+  excludeLinksFromLockfile: false
diff --git a/pnpm-workspace.yaml b/pnpm-workspace.yaml
index c76dc7d5..e95665e0 100644
--- a/pnpm-workspace.yaml
+++ b/pnpm-workspace.yaml
@@ -1,5 +1,6 @@
 packages:
   - 'packages/certificate-verification-js'
+  - 'packages/ic-certification-test-utils-wasm'
   - 'packages/ic-response-verification-wasm'
   - 'packages/ic-response-verification-tests'
   - 'packages/ic-response-verification-tests/dfx-project'
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
new file mode 100644
index 00000000..6fa09152
--- /dev/null
+++ b/rust-toolchain.toml
@@ -0,0 +1,4 @@
+[toolchain]
+channel = "1.70.0"
+components = ["rustfmt", "clippy"]
+targets = ["wasm32-unknown-unknown"]
diff --git a/scripts/package.sh b/scripts/package.sh
index dd8afb70..7c5e97fd 100755
--- a/scripts/package.sh
+++ b/scripts/package.sh
@@ -1,26 +1,32 @@
 PKG_ROOT=$1
 OUT_DIR=$2
 
+early_exit() {
+  echo "Performing early exit..."
+
+  exit 1
+}
+
 build_release_packages() {
-    wasm-pack build --target web --out-name web --out-dir $OUT_DIR/web --release $PKG_ROOT
-    wasm-pack build --target nodejs --out-name nodejs --out-dir $OUT_DIR/nodejs --release $PKG_ROOT
+    wasm-pack build --target web --out-name web --out-dir $OUT_DIR/web --release $PKG_ROOT || early_exit
+    wasm-pack build --target nodejs --out-name nodejs --out-dir $OUT_DIR/nodejs --release $PKG_ROOT || early_exit
 }
 
 build_debug_packages() {
-    wasm-pack build --target web --out-name web --out-dir $OUT_DIR/debug/dist/web --dev $PKG_ROOT -- --features "debug"
-    wasm-pack build --target nodejs --out-name nodejs --out-dir $OUT_DIR/debug/dist/nodejs --dev $PKG_ROOT -- --features "debug"
+    wasm-pack build --target web --out-name web --out-dir $OUT_DIR/debug/dist/web --dev $PKG_ROOT -- --features "debug" || early_exit
+    wasm-pack build --target nodejs --out-name nodejs --out-dir $OUT_DIR/debug/dist/nodejs --dev $PKG_ROOT -- --features "debug" || early_exit
 }
 
 delete_generated_files() {
-    find $OUT_DIR -name ".gitignore" -type f -delete
-    find $OUT_DIR -name "README.md" -type f -delete
-    find $OUT_DIR -name "package.json" -type f -delete
-    find $OUT_DIR -name "LICENSE" -type f -delete
+    find $OUT_DIR -name ".gitignore" -type f -delete || early_exit
+    find $OUT_DIR -name "README.md" -type f -delete || early_exit
+    find $OUT_DIR -name "package.json" -type f -delete || early_exit
+    find $OUT_DIR -name "LICENSE" -type f -delete || early_exit
 }
 
 add_debug_files() {
-    cp $PKG_ROOT/package.json $OUT_DIR/debug/
-    cp $PKG_ROOT/LICENSE $OUT_DIR/debug/
+    cp $PKG_ROOT/package.json $OUT_DIR/debug/ || early_exit
+    cp $PKG_ROOT/LICENSE $OUT_DIR/debug/ || early_exit
 }
 
 build_release_packages

From 80e718ff9bedf089fad36fcaa276cfedeedc7076 Mon Sep 17 00:00:00 2001
From: Nathan Mc Grath <contact@nathanos.dev>
Date: Fri, 21 Jul 2023 11:56:39 +0200
Subject: [PATCH 2/2] refactor: update verify certification params interface
 name

Co-authored-by: Kepler Vital <mail@keplervital.com>
---
 packages/certificate-verification-js/src/index.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/packages/certificate-verification-js/src/index.ts b/packages/certificate-verification-js/src/index.ts
index 66bc930a..e071b505 100644
--- a/packages/certificate-verification-js/src/index.ts
+++ b/packages/certificate-verification-js/src/index.ts
@@ -9,7 +9,7 @@ import { Principal } from '@dfinity/principal';
 import { PipeArrayBuffer, lebDecode } from '@dfinity/candid';
 import { CertificateTimeError, CertificateVerificationError } from './error';
 
-export interface CertificationParams {
+export interface VerifyCertificationParams {
   canisterId: Principal;
   encodedCertificate: ArrayBuffer;
   encodedTree: ArrayBuffer;
@@ -23,7 +23,7 @@ export async function verifyCertification({
   encodedTree,
   rootKey,
   maxCertificateTimeOffsetMs,
-}: CertificationParams): Promise<HashTree> {
+}: VerifyCertificationParams): Promise<HashTree> {
   const certificate = await Certificate.create({
     certificate: encodedCertificate,
     canisterId,