Updated the files.

my-app/node_modules/@sigstore/tuf/dist/appdata.d.ts

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+export declare function appDataPath(name: string): string;

my-app/node_modules/@sigstore/tuf/dist/appdata.js

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+"use strict";
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.appDataPath = void 0;
+/*
+Copyright 2023 The Sigstore Authors.
+
+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.
+*/
+const os_1 = __importDefault(require("os"));
+const path_1 = __importDefault(require("path"));
+function appDataPath(name) {
+    const homedir = os_1.default.homedir();
+    switch (process.platform) {
+        /* istanbul ignore next */
+        case 'darwin': {
+            const appSupport = path_1.default.join(homedir, 'Library', 'Application Support');
+            return path_1.default.join(appSupport, name);
+        }
+        /* istanbul ignore next */
+        case 'win32': {
+            const localAppData = process.env.LOCALAPPDATA || path_1.default.join(homedir, 'AppData', 'Local');
+            return path_1.default.join(localAppData, name, 'Data');
+        }
+        /* istanbul ignore next */
+        default: {
+            const localData = process.env.XDG_DATA_HOME || path_1.default.join(homedir, '.local', 'share');
+            return path_1.default.join(localData, name);
+        }
+    }
+}
+exports.appDataPath = appDataPath;

my-app/node_modules/@sigstore/tuf/dist/client.d.ts

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+import type { MakeFetchHappenOptions } from 'make-fetch-happen';
+export type Retry = MakeFetchHappenOptions['retry'];
+type FetchOptions = {
+    retry?: Retry;
+    timeout?: number;
+};
+export type TUFOptions = {
+    cachePath: string;
+    mirrorURL: string;
+    rootPath?: string;
+    forceCache: boolean;
+    forceInit: boolean;
+} & FetchOptions;
+export interface TUF {
+    getTarget(targetName: string): Promise<string>;
+}
+export declare class TUFClient implements TUF {
+    private updater;
+    constructor(options: TUFOptions);
+    refresh(): Promise<void>;
+    getTarget(targetName: string): Promise<string>;
+}
+export {};

my-app/node_modules/@sigstore/tuf/dist/client.js

@@ -0,0 +1,113 @@
+"use strict";
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.TUFClient = void 0;
+/*
+Copyright 2023 The Sigstore Authors.
+
+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.
+*/
+const fs_1 = __importDefault(require("fs"));
+const path_1 = __importDefault(require("path"));
+const tuf_js_1 = require("tuf-js");
+const _1 = require(".");
+const target_1 = require("./target");
+const TUF_SEEDS_PATH = require.resolve('../seeds.json');
+const TARGETS_DIR_NAME = 'targets';
+class TUFClient {
+    constructor(options) {
+        const url = new URL(options.mirrorURL);
+        const repoName = encodeURIComponent(url.host + url.pathname.replace(/\/$/, ''));
+        const cachePath = path_1.default.join(options.cachePath, repoName);
+        initTufCache(cachePath);
+        seedCache({
+            cachePath,
+            mirrorURL: options.mirrorURL,
+            tufRootPath: options.rootPath,
+            forceInit: options.forceInit,
+        });
+        this.updater = initClient({
+            mirrorURL: options.mirrorURL,
+            cachePath,
+            forceCache: options.forceCache,
+            retry: options.retry,
+            timeout: options.timeout,
+        });
+    }
+    async refresh() {
+        return this.updater.refresh();
+    }
+    getTarget(targetName) {
+        return (0, target_1.readTarget)(this.updater, targetName);
+    }
+}
+exports.TUFClient = TUFClient;
+// Initializes the TUF cache directory structure including the initial
+// root.json file. If the cache directory does not exist, it will be
+// created. If the targets directory does not exist, it will be created.
+// If the root.json file does not exist, it will be copied from the
+// rootPath argument.
+function initTufCache(cachePath) {
+    const targetsPath = path_1.default.join(cachePath, TARGETS_DIR_NAME);
+    if (!fs_1.default.existsSync(cachePath)) {
+        fs_1.default.mkdirSync(cachePath, { recursive: true });
+    }
+    if (!fs_1.default.existsSync(targetsPath)) {
+        fs_1.default.mkdirSync(targetsPath);
+    }
+}
+// Populates the TUF cache with the initial root.json file. If the root.json
+// file does not exist (or we're forcing re-initialization), copy it from either
+// the rootPath argument or from one of the repo seeds.
+function seedCache({ cachePath, mirrorURL, tufRootPath, forceInit, }) {
+    const cachedRootPath = path_1.default.join(cachePath, 'root.json');
+    // If the root.json file does not exist (or we're forcing re-initialization),
+    // populate it either from the supplied rootPath or from one of the repo seeds.
+    if (!fs_1.default.existsSync(cachedRootPath) || forceInit) {
+        if (tufRootPath) {
+            fs_1.default.copyFileSync(tufRootPath, cachedRootPath);
+        }
+        else {
+            // Load the embedded repo seeds
+            const seeds = JSON.parse(fs_1.default.readFileSync(TUF_SEEDS_PATH).toString('utf-8'));
+            const repoSeed = seeds[mirrorURL];
+            if (!repoSeed) {
+                throw new _1.TUFError({
+                    code: 'TUF_INIT_CACHE_ERROR',
+                    message: `No root.json found for mirror: ${mirrorURL}`,
+                });
+            }
+            fs_1.default.writeFileSync(cachedRootPath, Buffer.from(repoSeed['root.json'], 'base64'));
+            // Copy any seed targets into the cache
+            Object.entries(repoSeed.targets).forEach(([targetName, target]) => {
+                fs_1.default.writeFileSync(path_1.default.join(cachePath, TARGETS_DIR_NAME, targetName), Buffer.from(target, 'base64'));
+            });
+        }
+    }
+}
+function initClient(options) {
+    const config = {
+        fetchTimeout: options.timeout,
+        fetchRetry: options.retry,
+    };
+    return new tuf_js_1.Updater({
+        metadataBaseUrl: options.mirrorURL,
+        targetBaseUrl: `${options.mirrorURL}/targets`,
+        metadataDir: options.cachePath,
+        targetDir: path_1.default.join(options.cachePath, TARGETS_DIR_NAME),
+        forceCache: options.forceCache,
+        config,
+    });
+}

my-app/node_modules/@sigstore/tuf/dist/error.d.ts

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+type TUFErrorCode = 'TUF_INIT_CACHE_ERROR' | 'TUF_FIND_TARGET_ERROR' | 'TUF_REFRESH_METADATA_ERROR' | 'TUF_DOWNLOAD_TARGET_ERROR' | 'TUF_READ_TARGET_ERROR';
+export declare class TUFError extends Error {
+    code: TUFErrorCode;
+    cause: any | undefined;
+    constructor({ code, message, cause, }: {
+        code: TUFErrorCode;
+        message: string;
+        cause?: any;
+    });
+}
+export {};

my-app/node_modules/@sigstore/tuf/dist/error.js

@@ -0,0 +1,12 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.TUFError = void 0;
+class TUFError extends Error {
+    constructor({ code, message, cause, }) {
+        super(message);
+        this.code = code;
+        this.cause = cause;
+        this.name = this.constructor.name;
+    }
+}
+exports.TUFError = TUFError;

my-app/node_modules/@sigstore/tuf/dist/index.d.ts

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+import { TrustedRoot } from '@sigstore/protobuf-specs';
+import { TUFOptions as RequiredTUFOptions, TUF } from './client';
+export declare const DEFAULT_MIRROR_URL = "https://tuf-repo-cdn.sigstore.dev";
+export type TUFOptions = Partial<RequiredTUFOptions> & {
+    force?: boolean;
+};
+export declare function getTrustedRoot(options?: TUFOptions): Promise<TrustedRoot>;
+export declare function initTUF(options?: TUFOptions): Promise<TUF>;
+export type { TUF } from './client';
+export { TUFError } from './error';

my-app/node_modules/@sigstore/tuf/dist/index.js

@@ -0,0 +1,56 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.TUFError = exports.initTUF = exports.getTrustedRoot = exports.DEFAULT_MIRROR_URL = void 0;
+/*
+Copyright 2023 The Sigstore Authors.
+
+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.
+*/
+const protobuf_specs_1 = require("@sigstore/protobuf-specs");
+const appdata_1 = require("./appdata");
+const client_1 = require("./client");
+exports.DEFAULT_MIRROR_URL = 'https://tuf-repo-cdn.sigstore.dev';
+const DEFAULT_CACHE_DIR = 'sigstore-js';
+const DEFAULT_RETRY = { retries: 2 };
+const DEFAULT_TIMEOUT = 5000;
+const TRUSTED_ROOT_TARGET = 'trusted_root.json';
+async function getTrustedRoot(
+/* istanbul ignore next */
+options = {}) {
+    const client = createClient(options);
+    const trustedRoot = await client.getTarget(TRUSTED_ROOT_TARGET);
+    return protobuf_specs_1.TrustedRoot.fromJSON(JSON.parse(trustedRoot));
+}
+exports.getTrustedRoot = getTrustedRoot;
+async function initTUF(
+/* istanbul ignore next */
+options = {}) {
+    const client = createClient(options);
+    return client.refresh().then(() => client);
+}
+exports.initTUF = initTUF;
+// Create a TUF client with default options
+function createClient(options) {
+    /* istanbul ignore next */
+    return new client_1.TUFClient({
+        cachePath: options.cachePath || (0, appdata_1.appDataPath)(DEFAULT_CACHE_DIR),
+        rootPath: options.rootPath,
+        mirrorURL: options.mirrorURL || exports.DEFAULT_MIRROR_URL,
+        retry: options.retry ?? DEFAULT_RETRY,
+        timeout: options.timeout ?? DEFAULT_TIMEOUT,
+        forceCache: options.forceCache ?? false,
+        forceInit: options.forceInit ?? options.force ?? false,
+    });
+}
+var error_1 = require("./error");
+Object.defineProperty(exports, "TUFError", { enumerable: true, get: function () { return error_1.TUFError; } });

my-app/node_modules/@sigstore/tuf/dist/target.d.ts

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+import { Updater } from 'tuf-js';
+export declare function readTarget(tuf: Updater, targetPath: string): Promise<string>;

my-app/node_modules/@sigstore/tuf/dist/target.js

@@ -0,0 +1,80 @@
+"use strict";
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.readTarget = void 0;
+/*
+Copyright 2023 The Sigstore Authors.
+
+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.
+*/
+const fs_1 = __importDefault(require("fs"));
+const error_1 = require("./error");
+// Downloads and returns the specified target from the provided TUF Updater.
+async function readTarget(tuf, targetPath) {
+    const path = await getTargetPath(tuf, targetPath);
+    return new Promise((resolve, reject) => {
+        fs_1.default.readFile(path, 'utf-8', (err, data) => {
+            if (err) {
+                reject(new error_1.TUFError({
+                    code: 'TUF_READ_TARGET_ERROR',
+                    message: `error reading target ${path}`,
+                    cause: err,
+                }));
+            }
+            else {
+                resolve(data);
+            }
+        });
+    });
+}
+exports.readTarget = readTarget;
+// Returns the local path to the specified target. If the target is not yet
+// cached locally, the provided TUF Updater will be used to download and
+// cache the target.
+async function getTargetPath(tuf, target) {
+    let targetInfo;
+    try {
+        targetInfo = await tuf.getTargetInfo(target);
+    }
+    catch (err) {
+        throw new error_1.TUFError({
+            code: 'TUF_REFRESH_METADATA_ERROR',
+            message: 'error refreshing TUF metadata',
+            cause: err,
+        });
+    }
+    if (!targetInfo) {
+        throw new error_1.TUFError({
+            code: 'TUF_FIND_TARGET_ERROR',
+            message: `target ${target} not found`,
+        });
+    }
+    let path = await tuf.findCachedTarget(targetInfo);
+    // An empty path here means the target has not been cached locally, or is
+    // out of date. In either case, we need to download it.
+    if (!path) {
+        try {
+            path = await tuf.downloadTarget(targetInfo);
+        }
+        catch (err) {
+            throw new error_1.TUFError({
+                code: 'TUF_DOWNLOAD_TARGET_ERROR',
+                message: `error downloading target ${path}`,
+                cause: err,
+            });
+        }
+    }
+    return path;
+}