nft.storage/dist/src/lib.cjs.map

A client library for the https://nft.storage/ service. It provides a convenient interface for working with the HTTP API from a web browser or Node.js

{"version":3,"file":"lib.cjs","sources":["../../src/lib.js"],"sourcesContent":["/**\n * A client library for the https://nft.storage/ service. It provides a convenient\n * interface for working with the [Raw HTTP API](https://nft.storage/#api-docs)\n * from a web browser or [Node.js](https://nodejs.org/) and comes bundled with\n * TS for out-of-the box type inference and better IntelliSense.\n *\n * @example\n * ```js\n * import { NFTStorage, File, Blob } from \"nft.storage\"\n * const client = new NFTStorage({ token: API_TOKEN })\n *\n * const cid = await client.storeBlob(new Blob(['hello world']))\n * ```\n * @module\n */\n\nimport { transform } from 'streaming-iterables'\nimport pRetry, { AbortError } from 'p-retry'\nimport { TreewalkCarSplitter } from 'carbites/treewalk'\nimport { pack } from 'ipfs-car/pack'\nimport { CID } from 'multiformats/cid'\nimport throttledQueue from 'throttled-queue'\nimport * as Token from './token.js'\nimport { fetch, File, Blob, FormData, Blockstore } from './platform.js'\nimport { toGatewayURL } from './gateway.js'\nimport { BlockstoreCarReader } from './bs-car-reader.js'\nimport pipe from 'it-pipe'\n\nconst MAX_STORE_RETRIES = 5\nconst MAX_CONCURRENT_UPLOADS = 3\nconst MAX_CHUNK_SIZE = 1024 * 1024 * 50 // chunk to ~50MB CARs\nconst RATE_LIMIT_REQUESTS = 30\nconst RATE_LIMIT_PERIOD = 10 * 1000\n\n/**\n * @typedef {import('./lib/interface.js').Service} Service\n * @typedef {import('./lib/interface.js').CIDString} CIDString\n * @typedef {import('./lib/interface.js').Deal} Deal\n * @typedef {import('./lib/interface.js').FileObject} FileObject\n * @typedef {import('./lib/interface.js').FilesSource} FilesSource\n * @typedef {import('./lib/interface.js').Pin} Pin\n * @typedef {import('./lib/interface.js').CarReader} CarReader\n * @typedef {import('ipfs-car/blockstore').Blockstore} BlockstoreI\n * @typedef {import('./lib/interface.js').RateLimiter} RateLimiter\n * @typedef {import('./lib/interface.js').RequestOptions} RequestOptions\n */\n\n/**\n * @returns {RateLimiter}\n */\nexport function createRateLimiter() {\n  const throttle = throttledQueue(RATE_LIMIT_REQUESTS, RATE_LIMIT_PERIOD)\n  return () => throttle(() => {})\n}\n\n/**\n * Rate limiter used by static API if no rate limiter is passed. Note that each\n * instance of the NFTStorage class gets it's own limiter if none is passed.\n * This is because rate limits are enforced per API token.\n */\nconst globalRateLimiter = createRateLimiter()\n\n/**\n * @template {import('./lib/interface.js').TokenInput} T\n * @typedef {import('./lib/interface.js').Token<T>} TokenType\n */\n\n/**\n * @implements {Service}\n */\nclass NFTStorage {\n  /**\n   * Constructs a client bound to the given `options.token` and\n   * `options.endpoint`.\n   *\n   * @example\n   * ```js\n   * import { NFTStorage, File, Blob } from \"nft.storage\"\n   * const client = new NFTStorage({ token: API_TOKEN })\n   *\n   * const cid = await client.storeBlob(new Blob(['hello world']))\n   * ```\n   * Optionally you could pass an alternative API endpoint (e.g. for testing)\n   * @example\n   * ```js\n   * import { NFTStorage } from \"nft.storage\"\n   * const client = new NFTStorage({\n   *   token: API_TOKEN\n   *   endpoint: new URL('http://localhost:8080/')\n   * })\n   * ```\n   *\n   * @param {{token: string, endpoint?: URL, rateLimiter?: RateLimiter, did?: string}} options\n   */\n  constructor({\n    token,\n    did,\n    endpoint = new URL('https://api.nft.storage'),\n    rateLimiter,\n  }) {\n    /**\n     * Authorization token.\n     *\n     * @readonly\n     */\n    this.token = token\n    /**\n     * Service API endpoint `URL`.\n     * @readonly\n     */\n    this.endpoint = endpoint\n    /**\n     * @readonly\n     */\n    this.rateLimiter = rateLimiter || createRateLimiter()\n\n    /**\n     * @readonly\n     */\n    this.did = did\n  }\n\n  /**\n   * @hidden\n   * @param {object} options\n   * @param {string} options.token\n   * @param {string} [options.did]\n   */\n  static auth({ token, did }) {\n    if (!token) throw new Error('missing token')\n    return {\n      Authorization: `Bearer ${token}`,\n      'X-Client': 'nft.storage/js',\n      ...(did ? { 'x-agent-did': did } : {}),\n    }\n  }\n\n  /**\n   * Stores a single file and returns its CID.\n   *\n   * @param {Service} service\n   * @param {Blob} blob\n   * @param {RequestOptions} [options]\n   * @returns {Promise<CIDString>}\n   */\n  static async storeBlob(service, blob, options) {\n    const blockstore = new Blockstore()\n    let cidString\n\n    try {\n      const { cid, car } = await NFTStorage.encodeBlob(blob, { blockstore })\n      await NFTStorage.storeCar(service, car, options)\n      cidString = cid.toString()\n    } finally {\n      await blockstore.close()\n    }\n\n    return cidString\n  }\n\n  /**\n   * Stores a CAR file and returns its root CID.\n   *\n   * @param {Service} service\n   * @param {Blob|CarReader} car\n   * @param {import('./lib/interface.js').CarStorerOptions} [options]\n   * @returns {Promise<CIDString>}\n   */\n  static async storeCar(\n    { endpoint, rateLimiter = globalRateLimiter, ...token },\n    car,\n    { onStoredChunk, maxRetries, maxChunkSize, decoders, signal } = {}\n  ) {\n    const url = new URL('upload/', endpoint)\n    const headers = {\n      ...NFTStorage.auth(token),\n      'Content-Type': 'application/car',\n    }\n    const targetSize = maxChunkSize || MAX_CHUNK_SIZE\n    const splitter =\n      car instanceof Blob\n        ? await TreewalkCarSplitter.fromBlob(car, targetSize, { decoders })\n        : new TreewalkCarSplitter(car, targetSize, { decoders })\n\n    const upload = transform(\n      MAX_CONCURRENT_UPLOADS,\n      async function (/** @type {AsyncIterable<Uint8Array>} */ car) {\n        const carParts = []\n        for await (const part of car) {\n          carParts.push(part)\n        }\n        const carFile = new Blob(carParts, { type: 'application/car' })\n        /** @type {Blob|ArrayBuffer} */\n        let body = carFile\n        // FIXME: should not be necessary to await arrayBuffer()!\n        // Node.js 20 hangs reading the stream (it never ends) but in\n        // older node versions and the browser it is fine to pass a blob.\n        /* c8 ignore next 3 */\n        if (parseInt(globalThis.process?.versions?.node) > 18) {\n          body = await body.arrayBuffer()\n        }\n        const cid = await pRetry(\n          async () => {\n            await rateLimiter()\n            /** @type {Response} */\n            let response\n            try {\n              response = await fetch(url.toString(), {\n                method: 'POST',\n                headers,\n                body,\n                signal,\n              })\n            } catch (/** @type {any} */ err) {\n              // TODO: remove me and test when client accepts custom fetch impl\n              /* c8 ignore next 1 */\n              throw signal && signal.aborted ? new AbortError(err) : err\n            }\n            /* c8 ignore next 3 */\n            if (response.status === 429) {\n              throw new Error('rate limited')\n            }\n            const result = await response.json()\n            if (!result.ok) {\n              // do not retry if unauthorized - will not succeed\n              if (response.status === 401) {\n                throw new AbortError(result.error.message)\n              }\n              throw new Error(result.error.message)\n            }\n            return result.value.cid\n          },\n          {\n            retries: maxRetries == null ? MAX_STORE_RETRIES : maxRetries,\n          }\n        )\n        onStoredChunk && onStoredChunk(carFile.size)\n        return cid\n      }\n    )\n\n    let root\n    for await (const cid of upload(splitter.cars())) {\n      root = cid\n    }\n\n    return /** @type {CIDString} */ (root)\n  }\n\n  /**\n   * Stores a directory of files and returns a CID. Provided files **MUST**\n   * be within the same directory, otherwise error is raised e.g. `foo/bar.png`,\n   * `foo/bla/baz.json` is ok but `foo/bar.png`, `bla/baz.json` is not.\n   *\n   * @param {Service} service\n   * @param {FilesSource} filesSource\n   * @param {RequestOptions} [options]\n   * @returns {Promise<CIDString>}\n   */\n  static async storeDirectory(service, filesSource, options) {\n    const blockstore = new Blockstore()\n    let cidString\n    try {\n      const { cid, car } = await NFTStorage.encodeDirectory(filesSource, {\n        blockstore,\n      })\n      await NFTStorage.storeCar(service, car, options)\n      cidString = cid.toString()\n    } finally {\n      await blockstore.close()\n    }\n\n    return cidString\n  }\n\n  /**\n   * Stores the given token and all resources it references (in the form of a\n   * File or a Blob) along with a metadata JSON as specificed in ERC-1155. The\n   * `token.image` must be either a `File` or a `Blob` instance, which will be\n   * stored and the corresponding content address URL will be saved in the\n   * metadata JSON file under `image` field.\n   *\n   * If `token.properties` contains properties with `File` or `Blob` values,\n   * those also get stored and their URLs will be saved in the metadata JSON\n   * file in their place.\n   *\n   * Note: URLs for `File` objects will retain file names e.g. in case of\n   * `new File([bytes], 'cat.png', { type: 'image/png' })` will be transformed\n   * into a URL that looks like `ipfs://bafy...hash/image/cat.png`. For `Blob`\n   * objects, the URL will not have a file name name or mime type, instead it\n   * will be transformed into a URL that looks like\n   * `ipfs://bafy...hash/image/blob`.\n   *\n   * @template {import('./lib/interface.js').TokenInput} T\n   * @param {Service} service\n   * @param {T} metadata\n   * @param {RequestOptions} [options]\n   * @returns {Promise<TokenType<T>>}\n   */\n  static async store(service, metadata, options) {\n    const { token, car } = await NFTStorage.encodeNFT(metadata)\n    await NFTStorage.storeCar(service, car, options)\n    return token\n  }\n\n  /**\n   * Returns current status of the stored NFT by its CID. Note the NFT must\n   * have previously been stored by this account.\n   *\n   * @param {Service} service\n   * @param {string} cid\n   * @param {RequestOptions} [options]\n   * @returns {Promise<import('./lib/interface.js').StatusResult>}\n   */\n  static async status(\n    { endpoint, rateLimiter = globalRateLimiter, ...token },\n    cid,\n    options\n  ) {\n    const url = new URL(`${cid}/`, endpoint)\n    await rateLimiter()\n    const response = await fetch(url.toString(), {\n      method: 'GET',\n      headers: NFTStorage.auth(token),\n      signal: options && options.signal,\n    })\n    /* c8 ignore next 3 */\n    if (response.status === 429) {\n      throw new Error('rate limited')\n    }\n    const result = await response.json()\n\n    if (result.ok) {\n      return {\n        cid: result.value.cid,\n        deals: decodeDeals(result.value.deals),\n        size: result.value.size,\n        pin: decodePin(result.value.pin),\n        created: new Date(result.value.created),\n      }\n    } else {\n      throw new Error(result.error.message)\n    }\n  }\n\n  /**\n   * Check if a CID of an NFT is being stored by NFT.Storage.\n   *\n   * @param {import('./lib/interface.js').PublicService} service\n   * @param {string} cid\n   * @param {RequestOptions} [options]\n   * @returns {Promise<import('./lib/interface.js').CheckResult>}\n   */\n  static async check(\n    { endpoint, rateLimiter = globalRateLimiter },\n    cid,\n    options\n  ) {\n    const url = new URL(`check/${cid}/`, endpoint)\n    await rateLimiter()\n    const response = await fetch(url.toString(), {\n      signal: options && options.signal,\n    })\n    /* c8 ignore next 3 */\n    if (response.status === 429) {\n      throw new Error('rate limited')\n    }\n    const result = await response.json()\n\n    if (result.ok) {\n      return {\n        cid: result.value.cid,\n        deals: decodeDeals(result.value.deals),\n        pin: result.value.pin,\n      }\n    } else {\n      throw new Error(result.error.message)\n    }\n  }\n\n  /**\n   * Removes stored content by its CID from this account. Please note that\n   * even if content is removed from the service other nodes that have\n   * replicated it might still continue providing it.\n   *\n   * @param {Service} service\n   * @param {string} cid\n   * @param {RequestOptions} [options]\n   * @returns {Promise<void>}\n   */\n  static async delete(\n    { endpoint, rateLimiter = globalRateLimiter, ...token },\n    cid,\n    options\n  ) {\n    const url = new URL(`${cid}/`, endpoint)\n    await rateLimiter()\n    const response = await fetch(url.toString(), {\n      method: 'DELETE',\n      headers: NFTStorage.auth(token),\n      signal: options && options.signal,\n    })\n    /* c8 ignore next 3 */\n    if (response.status === 429) {\n      throw new Error('rate limited')\n    }\n    const result = await response.json()\n    if (!result.ok) {\n      throw new Error(result.error.message)\n    }\n  }\n\n  /**\n   * Encodes the given token and all resources it references (in the form of a\n   * File or a Blob) along with a metadata JSON as specificed in ERC-1155 to a\n   * CAR file. The `token.image` must be either a `File` or a `Blob` instance,\n   * which will be stored and the corresponding content address URL will be\n   * saved in the metadata JSON file under `image` field.\n   *\n   * If `token.properties` contains properties with `File` or `Blob` values,\n   * those also get stored and their URLs will be saved in the metadata JSON\n   * file in their place.\n   *\n   * Note: URLs for `File` objects will retain file names e.g. in case of\n   * `new File([bytes], 'cat.png', { type: 'image/png' })` will be transformed\n   * into a URL that looks like `ipfs://bafy...hash/image/cat.png`. For `Blob`\n   * objects, the URL will not have a file name name or mime type, instead it\n   * will be transformed into a URL that looks like\n   * `ipfs://bafy...hash/image/blob`.\n   *\n   * @example\n   * ```js\n   * const { token, car } = await NFTStorage.encodeNFT({\n   *   name: 'nft.storage store test',\n   *   description: 'Test ERC-1155 compatible metadata.',\n   *   image: new File(['<DATA>'], 'pinpie.jpg', { type: 'image/jpg' }),\n   *   properties: {\n   *     custom: 'Custom data can appear here, files are auto uploaded.',\n   *     file: new File(['<DATA>'], 'README.md', { type: 'text/plain' }),\n   *   }\n   * })\n   *\n   * console.log('IPFS URL for the metadata:', token.url)\n   * console.log('metadata.json contents:\\n', token.data)\n   * console.log('metadata.json with IPFS gateway URLs:\\n', token.embed())\n   *\n   * // Now store the CAR file on NFT.Storage\n   * await client.storeCar(car)\n   * ```\n   *\n   * @template {import('./lib/interface.js').TokenInput} T\n   * @param {T} input\n   * @returns {Promise<{ cid: CID, token: TokenType<T>, car: CarReader }>}\n   */\n  static async encodeNFT(input) {\n    validateERC1155(input)\n    return Token.Token.encode(input)\n  }\n\n  /**\n   * Encodes a single file to a CAR file and also returns its root CID.\n   *\n   * @example\n   * ```js\n   * const content = new Blob(['hello world'])\n   * const { cid, car } = await NFTStorage.encodeBlob(content)\n   *\n   * // Root CID of the file\n   * console.log(cid.toString())\n   *\n   * // Now store the CAR file on NFT.Storage\n   * await client.storeCar(car)\n   * ```\n   *\n   * @param {Blob} blob\n   * @param {object} [options]\n   * @param {BlockstoreI} [options.blockstore]\n   * @returns {Promise<{ cid: CID, car: CarReader }>}\n   */\n  static async encodeBlob(blob, { blockstore } = {}) {\n    if (blob.size === 0) {\n      throw new Error('Content size is 0, make sure to provide some content')\n    }\n    return packCar([toImportCandidate('blob', blob)], {\n      blockstore,\n      wrapWithDirectory: false,\n    })\n  }\n\n  /**\n   * Encodes a directory of files to a CAR file and also returns the root CID.\n   * Provided files **MUST** be within the same directory, otherwise error is\n   * raised e.g. `foo/bar.png`, `foo/bla/baz.json` is ok but `foo/bar.png`,\n   * `bla/baz.json` is not.\n   *\n   * @example\n   * ```js\n   * const { cid, car } = await NFTStorage.encodeDirectory([\n   *   new File(['hello world'], 'hello.txt'),\n   *   new File([JSON.stringify({'from': 'incognito'}, null, 2)], 'metadata.json')\n   * ])\n   *\n   * // Root CID of the directory\n   * console.log(cid.toString())\n   *\n   * // Now store the CAR file on NFT.Storage\n   * await client.storeCar(car)\n   * ```\n   *\n   * @param {FilesSource} files\n   * @param {object} [options]\n   * @param {BlockstoreI} [options.blockstore]\n   * @returns {Promise<{ cid: CID, car: CarReader }>}\n   */\n  static async encodeDirectory(files, { blockstore } = {}) {\n    let size = 0\n    const input = pipe(files, async function* (files) {\n      for await (const file of files) {\n        yield toImportCandidate(file.name, file)\n        size += file.size\n      }\n    })\n    const packed = await packCar(input, {\n      blockstore,\n      wrapWithDirectory: true,\n    })\n    if (size === 0) {\n      throw new Error(\n        'Total size of files should exceed 0, make sure to provide some content'\n      )\n    }\n    return packed\n  }\n\n  // Just a sugar so you don't have to pass around endpoint and token around.\n\n  /**\n   * Stores a single file and returns the corresponding Content Identifier (CID).\n   * Takes a [Blob](https://developer.mozilla.org/en-US/docs/Web/API/Blob/Blob)\n   * or a [File](https://developer.mozilla.org/en-US/docs/Web/API/File). Note\n   * that no file name or file metadata is retained.\n   *\n   * @example\n   * ```js\n   * const content = new Blob(['hello world'])\n   * const cid = await client.storeBlob(content)\n   * cid //> 'zdj7Wn9FQAURCP6MbwcWuzi7u65kAsXCdjNTkhbJcoaXBusq9'\n   * ```\n   *\n   * @param {Blob} blob\n   * @param {RequestOptions} [options]\n   */\n  storeBlob(blob, options) {\n    return NFTStorage.storeBlob(this, blob, options)\n  }\n\n  /**\n   * Stores files encoded as a single [Content Addressed Archive\n   * (CAR)](https://github.com/ipld/specs/blob/master/block-layer/content-addressable-archives.md).\n   *\n   * Takes a [Blob](https://developer.mozilla.org/en-US/docs/Web/API/Blob/Blob)\n   * or a [File](https://developer.mozilla.org/en-US/docs/Web/API/File).\n   *\n   * Returns the corresponding Content Identifier (CID).\n   *\n   * See the [`ipfs-car` docs](https://www.npmjs.com/package/ipfs-car) for more\n   * details on packing a CAR file.\n   *\n   * @example\n   * ```js\n   * import { pack } from 'ipfs-car/pack'\n   * import { CarReader } from '@ipld/car'\n   * const { out, root } = await pack({\n   *  input: fs.createReadStream('pinpie.pdf')\n   * })\n   * const expectedCid = root.toString()\n   * const carReader = await CarReader.fromIterable(out)\n   * const cid = await storage.storeCar(carReader)\n   * console.assert(cid === expectedCid)\n   * ```\n   *\n   * @example\n   * ```\n   * import { packToBlob } from 'ipfs-car/pack/blob'\n   * const data = 'Hello world'\n   * const { root, car } = await packToBlob({ input: [new TextEncoder().encode(data)] })\n   * const expectedCid = root.toString()\n   * const cid = await client.storeCar(car)\n   * console.assert(cid === expectedCid)\n   * ```\n   * @param {Blob|CarReader} car\n   * @param {import('./lib/interface.js').CarStorerOptions} [options]\n   */\n  storeCar(car, options) {\n    return NFTStorage.storeCar(this, car, options)\n  }\n\n  /**\n   * Stores a directory of files and returns a CID for the directory.\n   *\n   * @example\n   * ```js\n   * const cid = await client.storeDirectory([\n   *   new File(['hello world'], 'hello.txt'),\n   *   new File([JSON.stringify({'from': 'incognito'}, null, 2)], 'metadata.json')\n   * ])\n   * cid //>\n   * ```\n   *\n   * Argument can be a [FileList](https://developer.mozilla.org/en-US/docs/Web/API/FileList)\n   * instance as well, in which case directory structure will be retained.\n   *\n   * @param {FilesSource} files\n   * @param {RequestOptions} [options]\n   */\n  storeDirectory(files, options) {\n    return NFTStorage.storeDirectory(this, files, options)\n  }\n\n  /**\n   * Returns current status of the stored NFT by its CID. Note the NFT must\n   * have previously been stored by this account.\n   *\n   * @example\n   * ```js\n   * const status = await client.status('zdj7Wn9FQAURCP6MbwcWuzi7u65kAsXCdjNTkhbJcoaXBusq9')\n   * ```\n   *\n   * @param {string} cid\n   * @param {RequestOptions} [options]\n   */\n  status(cid, options) {\n    return NFTStorage.status(this, cid, options)\n  }\n\n  /**\n   * Removes stored content by its CID from the service.\n   *\n   * > Please note that even if content is removed from the service other nodes\n   * that have replicated it might still continue providing it.\n   *\n   * @example\n   * ```js\n   * await client.delete('zdj7Wn9FQAURCP6MbwcWuzi7u65kAsXCdjNTkhbJcoaXBusq9')\n   * ```\n   *\n   * @param {string} cid\n   * @param {RequestOptions} [options]\n   */\n  delete(cid, options) {\n    return NFTStorage.delete(this, cid, options)\n  }\n\n  /**\n   * Check if a CID of an NFT is being stored by nft.storage. Throws if the NFT\n   * was not found.\n   *\n   * @example\n   * ```js\n   * const status = await client.check('zdj7Wn9FQAURCP6MbwcWuzi7u65kAsXCdjNTkhbJcoaXBusq9')\n   * ```\n   *\n   * @param {string} cid\n   * @param {RequestOptions} [options]\n   */\n  check(cid, options) {\n    return NFTStorage.check(this, cid, options)\n  }\n\n  /**\n   * Stores the given token and all resources it references (in the form of a\n   * File or a Blob) along with a metadata JSON as specificed in\n   * [ERC-1155](https://eips.ethereum.org/EIPS/eip-1155#metadata). The\n   * `token.image` must be either a `File` or a `Blob` instance, which will be\n   * stored and the corresponding content address URL will be saved in the\n   * metadata JSON file under `image` field.\n   *\n   * If `token.properties` contains properties with `File` or `Blob` values,\n   * those also get stored and their URLs will be saved in the metadata JSON\n   * file in their place.\n   *\n   * Note: URLs for `File` objects will retain file names e.g. in case of\n   * `new File([bytes], 'cat.png', { type: 'image/png' })` will be transformed\n   * into a URL that looks like `ipfs://bafy...hash/image/cat.png`. For `Blob`\n   * objects, the URL will not have a file name name or mime type, instead it\n   * will be transformed into a URL that looks like\n   * `ipfs://bafy...hash/image/blob`.\n   *\n   * @example\n   * ```js\n   * const metadata = await client.store({\n   *   name: 'nft.storage store test',\n   *   description: 'Test ERC-1155 compatible metadata.',\n   *   image: new File(['<DATA>'], 'pinpie.jpg', { type: 'image/jpg' }),\n   *   properties: {\n   *     custom: 'Custom data can appear here, files are auto uploaded.',\n   *     file: new File(['<DATA>'], 'README.md', { type: 'text/plain' }),\n   *   }\n   * })\n   *\n   * console.log('IPFS URL for the metadata:', metadata.url)\n   * console.log('metadata.json contents:\\n', metadata.data)\n   * console.log('metadata.json with IPFS gateway URLs:\\n', metadata.embed())\n   * ```\n   *\n   * @template {import('./lib/interface.js').TokenInput} T\n   * @param {T} token\n   * @param {RequestOptions} [options]\n   */\n  store(token, options) {\n    return NFTStorage.store(this, token, options)\n  }\n}\n\n/**\n * Cast an iterable to an asyncIterable\n * @template T\n * @param {Iterable<T>} iterable\n * @returns {AsyncIterable<T>}\n */\nexport function toAsyncIterable(iterable) {\n  return (async function* () {\n    for (const item of iterable) {\n      yield item\n    }\n  })()\n}\n\n/**\n * @template {import('./lib/interface.js').TokenInput} T\n * @param {T} metadata\n */\nconst validateERC1155 = ({ name, description, image, decimals }) => {\n  // Just validate that expected fields are present\n  if (typeof name !== 'string') {\n    throw new TypeError(\n      'string property `name` identifying the asset is required'\n    )\n  }\n  if (typeof description !== 'string') {\n    throw new TypeError(\n      'string property `description` describing asset is required'\n    )\n  }\n  if (!(image instanceof Blob)) {\n    throw new TypeError('property `image` must be a Blob or File object')\n  } else if (!image.type.startsWith('image/')) {\n    console.warn(`According to ERC721 Metadata JSON Schema 'image' must have 'image/*' mime type.\n\nFor better interoperability we would highly recommend storing content with different mime type under 'properties' namespace e.g. \\`properties: { video: file }\\` and using 'image' field for storing a preview image for it instead.\n\nFor more context please see ERC-721 specification https://eips.ethereum.org/EIPS/eip-721`)\n  }\n\n  if (typeof decimals !== 'undefined' && typeof decimals !== 'number') {\n    throw new TypeError('property `decimals` must be an integer value')\n  }\n}\n\n/**\n * @param {import('ipfs-car/pack').ImportCandidateStream|Array<{ path: string, content: import('./platform.js').ReadableStream }>} input\n * @param {object} [options]\n * @param {BlockstoreI} [options.blockstore]\n * @param {boolean} [options.wrapWithDirectory]\n */\nconst packCar = async (input, { blockstore, wrapWithDirectory } = {}) => {\n  /* c8 ignore next 1 */\n  blockstore = blockstore || new Blockstore()\n  const { root: cid } = await pack({ input, blockstore, wrapWithDirectory })\n  const car = new BlockstoreCarReader(1, [cid], blockstore)\n  return { cid, car }\n}\n\n/**\n * @param {Deal[]} deals\n * @returns {Deal[]}\n */\nconst decodeDeals = (deals) =>\n  deals.map((deal) => {\n    const { dealActivation, dealExpiration, lastChanged } = {\n      dealExpiration: null,\n      dealActivation: null,\n      ...deal,\n    }\n\n    return {\n      ...deal,\n      lastChanged: new Date(lastChanged),\n      ...(dealActivation && { dealActivation: new Date(dealActivation) }),\n      ...(dealExpiration && { dealExpiration: new Date(dealExpiration) }),\n    }\n  })\n\n/**\n * @param {Pin} pin\n * @returns {Pin}\n */\nconst decodePin = (pin) => ({ ...pin, created: new Date(pin.created) })\n\n/**\n * Convert the passed blob to an \"import candidate\" - an object suitable for\n * passing to the ipfs-unixfs-importer. Note: content is an accessor so that\n * the stream is created only when needed.\n *\n * @param {string} path\n * @param {Pick<Blob, 'stream'>|{ stream: () => AsyncIterable<Uint8Array> }} blob\n * @returns {import('ipfs-core-types/src/utils.js').ImportCandidate}\n */\nfunction toImportCandidate(path, blob) {\n  /** @type {AsyncIterable<Uint8Array>} */\n  let stream\n  return {\n    path,\n    get content() {\n      stream = stream || blob.stream()\n      return stream\n    },\n  }\n}\n\nexport { NFTStorage, File, Blob, FormData, toGatewayURL, Token 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