@opendatalabs/vana-sdk/dist/storage/providers/r2.cjs.map

A TypeScript library for interacting with Vana Network smart contracts.

{"version":3,"sources":["../../../src/storage/providers/r2.ts"],"sourcesContent":["import { hmac } from \"@noble/hashes/hmac\";\nimport { sha256 } from \"@noble/hashes/sha2\";\n\nimport {\n  StorageError,\n  type StorageProvider,\n  type StorageUploadResult,\n  type StorageFile,\n  type StorageListOptions,\n  type StorageProviderConfig,\n} from \"../index\";\n\n/**\n * Configuration for {@link R2Storage}.\n *\n * @category Storage\n */\nexport interface R2Config {\n  /** Cloudflare account ID. Used to derive the S3 endpoint when `endpoint` is not given. */\n  accountId?: string;\n  /**\n   * Full S3 endpoint URL. Overrides `accountId`.\n   *\n   * Defaults to `https://{accountId}.r2.cloudflarestorage.com`.\n   */\n  endpoint?: string;\n  /** R2 access key ID. */\n  accessKeyId: string;\n  /** R2 secret access key. */\n  secretAccessKey: string;\n  /** Bucket name. */\n  bucket: string;\n  /**\n   * Public URL prefix used when constructing the URL returned by {@link R2Storage.upload}.\n   *\n   * If unset, defaults to `https://{bucket}.{accountId}.r2.dev` (R2's default public hostname).\n   * Set this to a custom domain bound to the bucket if you have one.\n   */\n  publicUrl?: string;\n  /**\n   * S3 region. R2 expects `auto`; consumers can override for compatibility with other\n   * S3-compatible stores reachable through the same code path.\n   */\n  region?: string;\n}\n\ninterface SignedRequest {\n  url: string;\n  headers: Record<string, string>;\n}\n\nconst SERVICE = \"s3\";\nconst DEFAULT_REGION = \"auto\";\n\n/**\n * Cloudflare R2 storage provider.\n *\n * @remarks\n * Uses R2's S3-compatible API with SigV4 signed `fetch` requests, so the same\n * implementation runs in browsers, Node.js, and Workers without pulling in\n * `@aws-sdk/client-s3`. Treats blobs as opaque - encryption, access control,\n * and per-tenant prefixing are out of scope and live in higher layers.\n *\n * The SDK exposes R2 as the recommended default backend. Other providers\n * (Pinata, IPFS, Google Drive, Dropbox, CallbackStorage) remain available for\n * teams that need IPFS semantics or user-owned storage.\n *\n * @category Storage\n *\n * @example\n * ```typescript\n * import { R2Storage, StorageManager } from \"@opendatalabs/vana-sdk/node\";\n *\n * const storage = new StorageManager();\n * storage.register(\n *   \"r2\",\n *   new R2Storage({\n *     accountId: process.env.R2_ACCOUNT_ID!,\n *     accessKeyId: process.env.R2_ACCESS_KEY_ID!,\n *     secretAccessKey: process.env.R2_SECRET_ACCESS_KEY!,\n *     bucket: process.env.R2_BUCKET!,\n *     publicUrl: \"https://files.example.com\",\n *   }),\n *   true,\n * );\n *\n * const result = await storage.upload(myBlob, \"report.json\");\n * console.log(result.url);\n * ```\n */\nexport class R2Storage implements StorageProvider {\n  private readonly endpoint: string;\n  private readonly publicUrl: string;\n  private readonly region: string;\n  private readonly bucket: string;\n\n  constructor(private readonly config: R2Config) {\n    if (!config.accessKeyId) {\n      throw new StorageError(\n        \"R2 accessKeyId is required\",\n        \"MISSING_ACCESS_KEY\",\n        \"r2\",\n      );\n    }\n    if (!config.secretAccessKey) {\n      throw new StorageError(\n        \"R2 secretAccessKey is required\",\n        \"MISSING_SECRET_KEY\",\n        \"r2\",\n      );\n    }\n    if (!config.bucket) {\n      throw new StorageError(\"R2 bucket is required\", \"MISSING_BUCKET\", \"r2\");\n    }\n    if (!config.endpoint && !config.accountId) {\n      throw new StorageError(\n        \"R2 endpoint or accountId is required\",\n        \"MISSING_ENDPOINT\",\n        \"r2\",\n      );\n    }\n    if (!config.publicUrl && !config.accountId) {\n      throw new StorageError(\n        \"R2 publicUrl is required when accountId is not provided\",\n        \"MISSING_PUBLIC_URL\",\n        \"r2\",\n      );\n    }\n\n    this.bucket = config.bucket;\n    this.region = config.region ?? DEFAULT_REGION;\n    this.endpoint = (\n      config.endpoint ?? `https://${config.accountId}.r2.cloudflarestorage.com`\n    ).replace(/\\/$/, \"\");\n    this.publicUrl = (\n      config.publicUrl ?? `https://${config.bucket}.${config.accountId}.r2.dev`\n    ).replace(/\\/$/, \"\");\n  }\n\n  async upload(file: Blob, filename?: string): Promise<StorageUploadResult> {\n    const key = filename ?? `vana-${Date.now()}-${randomSuffix()}.dat`;\n    const body = new Uint8Array(await file.arrayBuffer());\n    const contentType =\n      file.type !== \"\" ? file.type : \"application/octet-stream\";\n\n    try {\n      const signed = await this.signRequest({\n        method: \"PUT\",\n        path: `/${this.bucket}/${encodePath(key)}`,\n        body,\n        extraHeaders: { \"content-type\": contentType },\n      });\n\n      const response = await fetch(signed.url, {\n        method: \"PUT\",\n        headers: signed.headers,\n        body,\n      });\n\n      if (!response.ok) {\n        throw new StorageError(\n          `R2 upload failed: ${response.status} ${response.statusText} - ${await safeText(response)}`,\n          \"UPLOAD_FAILED\",\n          \"r2\",\n        );\n      }\n\n      return {\n        url: `${this.publicUrl}/${encodePath(key)}`,\n        size: file.size,\n        contentType,\n      };\n    } catch (error) {\n      throw wrapError(error, \"UPLOAD_ERROR\", \"r2\");\n    }\n  }\n\n  async download(url: string): Promise<Blob> {\n    const key = this.extractKey(url);\n    if (!key) {\n      throw new StorageError(\n        `Could not extract object key from URL: ${url}`,\n        \"INVALID_URL\",\n        \"r2\",\n      );\n    }\n\n    try {\n      const signed = await this.signRequest({\n        method: \"GET\",\n        path: `/${this.bucket}/${encodePath(key)}`,\n      });\n\n      const response = await fetch(signed.url, {\n        method: \"GET\",\n        headers: signed.headers,\n      });\n\n      if (!response.ok) {\n        throw new StorageError(\n          `R2 download failed: ${response.status} ${response.statusText}`,\n          \"DOWNLOAD_FAILED\",\n          \"r2\",\n        );\n      }\n\n      return await response.blob();\n    } catch (error) {\n      throw wrapError(error, \"DOWNLOAD_ERROR\", \"r2\");\n    }\n  }\n\n  async list(options?: StorageListOptions): Promise<StorageFile[]> {\n    try {\n      const params = new URLSearchParams({ \"list-type\": \"2\" });\n      if (options?.namePattern) {\n        params.set(\"prefix\", options.namePattern);\n      }\n      if (options?.limit !== undefined) {\n        params.set(\"max-keys\", String(options.limit));\n      }\n      if (options?.offset !== undefined) {\n        params.set(\"continuation-token\", String(options.offset));\n      }\n\n      const signed = await this.signRequest({\n        method: \"GET\",\n        path: `/${this.bucket}`,\n        query: params,\n      });\n\n      const response = await fetch(signed.url, {\n        method: \"GET\",\n        headers: signed.headers,\n      });\n\n      if (!response.ok) {\n        throw new StorageError(\n          `R2 list failed: ${response.status} ${response.statusText}`,\n          \"LIST_FAILED\",\n          \"r2\",\n        );\n      }\n\n      const xml = await response.text();\n      return parseListObjects(xml).map((obj) => ({\n        id: obj.key,\n        name: obj.key,\n        url: `${this.publicUrl}/${encodePath(obj.key)}`,\n        size: obj.size,\n        contentType: \"application/octet-stream\",\n        createdAt: obj.lastModified,\n      }));\n    } catch (error) {\n      throw wrapError(error, \"LIST_ERROR\", \"r2\");\n    }\n  }\n\n  async delete(url: string): Promise<boolean> {\n    const key = this.extractKey(url);\n    if (!key) {\n      throw new StorageError(\n        `Could not extract object key from URL: ${url}`,\n        \"INVALID_URL\",\n        \"r2\",\n      );\n    }\n\n    try {\n      const signed = await this.signRequest({\n        method: \"DELETE\",\n        path: `/${this.bucket}/${encodePath(key)}`,\n      });\n\n      const response = await fetch(signed.url, {\n        method: \"DELETE\",\n        headers: signed.headers,\n      });\n\n      if (!response.ok && response.status !== 204) {\n        throw new StorageError(\n          `R2 delete failed: ${response.status} ${response.statusText}`,\n          \"DELETE_FAILED\",\n          \"r2\",\n        );\n      }\n\n      return true;\n    } catch (error) {\n      throw wrapError(error, \"DELETE_ERROR\", \"r2\");\n    }\n  }\n\n  getConfig(): StorageProviderConfig {\n    return {\n      name: \"Cloudflare R2\",\n      type: \"r2\",\n      requiresAuth: true,\n      features: {\n        upload: true,\n        download: true,\n        list: true,\n        delete: true,\n      },\n    };\n  }\n\n  /**\n   * Extract the object key from a URL. Accepts public URLs minted by `upload()`\n   * as well as raw keys for callers that already track them out-of-band.\n   *\n   * @internal\n   */\n  private extractKey(urlOrKey: string): string | null {\n    if (urlOrKey.startsWith(this.publicUrl + \"/\")) {\n      return decodeURIComponent(urlOrKey.slice(this.publicUrl.length + 1));\n    }\n    if (urlOrKey.startsWith(this.endpoint + \"/\")) {\n      const rest = urlOrKey.slice(this.endpoint.length + 1);\n      const slash = rest.indexOf(\"/\");\n      return slash === -1 ? null : decodeURIComponent(rest.slice(slash + 1));\n    }\n    if (!urlOrKey.includes(\"://\")) {\n      return urlOrKey;\n    }\n    return null;\n  }\n\n  private async signRequest(req: {\n    method: string;\n    path: string;\n    query?: URLSearchParams;\n    body?: Uint8Array;\n    extraHeaders?: Record<string, string>;\n  }): Promise<SignedRequest> {\n    // SigV4's host header must include the port for non-default ports\n    // (e.g. localhost:9000 for S3-compatible test endpoints). URL.host keeps\n    // the port; URL.hostname strips it.\n    const { host } = new URL(this.endpoint);\n    const now = new Date();\n    const amzDate = formatAmzDate(now);\n    const dateStamp = amzDate.slice(0, 8);\n\n    const payloadHash = req.body ? toHex(sha256(req.body)) : EMPTY_PAYLOAD_HASH;\n\n    const canonicalQuery = req.query ? canonicalizeQuery(req.query) : \"\";\n\n    const headers: Record<string, string> = {\n      host,\n      \"x-amz-content-sha256\": payloadHash,\n      \"x-amz-date\": amzDate,\n      ...(req.extraHeaders ?? {}),\n    };\n\n    const sortedHeaderNames = Object.keys(headers)\n      .map((h) => h.toLowerCase())\n      .sort();\n    const canonicalHeaders =\n      sortedHeaderNames\n        .map((h) => `${h}:${headers[h].trim().replace(/\\s+/g, \" \")}`)\n        .join(\"\\n\") + \"\\n\";\n    const signedHeaders = sortedHeaderNames.join(\";\");\n\n    const canonicalRequest = [\n      req.method,\n      req.path,\n      canonicalQuery,\n      canonicalHeaders,\n      signedHeaders,\n      payloadHash,\n    ].join(\"\\n\");\n\n    const credentialScope = `${dateStamp}/${this.region}/${SERVICE}/aws4_request`;\n    const stringToSign = [\n      \"AWS4-HMAC-SHA256\",\n      amzDate,\n      credentialScope,\n      toHex(sha256(new TextEncoder().encode(canonicalRequest))),\n    ].join(\"\\n\");\n\n    const signingKey = deriveSigningKey(\n      this.config.secretAccessKey,\n      dateStamp,\n      this.region,\n      SERVICE,\n    );\n    const signature = toHex(\n      hmac(sha256, signingKey, new TextEncoder().encode(stringToSign)),\n    );\n\n    headers.authorization = `AWS4-HMAC-SHA256 Credential=${this.config.accessKeyId}/${credentialScope}, SignedHeaders=${signedHeaders}, Signature=${signature}`;\n\n    const url =\n      this.endpoint +\n      req.path +\n      (canonicalQuery !== \"\" ? `?${canonicalQuery}` : \"\");\n\n    return { url, headers };\n  }\n}\n\nconst EMPTY_PAYLOAD_HASH =\n  \"e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855\";\n\nfunction deriveSigningKey(\n  secret: string,\n  dateStamp: string,\n  region: string,\n  service: string,\n): Uint8Array {\n  const enc = new TextEncoder();\n  const kDate = hmac(\n    sha256,\n    enc.encode(`AWS4${secret}`),\n    enc.encode(dateStamp),\n  );\n  const kRegion = hmac(sha256, kDate, enc.encode(region));\n  const kService = hmac(sha256, kRegion, enc.encode(service));\n  return hmac(sha256, kService, enc.encode(\"aws4_request\"));\n}\n\nfunction formatAmzDate(date: Date): string {\n  // YYYYMMDDTHHMMSSZ\n  const iso = date.toISOString();\n  return iso.replace(/[-:]/g, \"\").replace(/\\.\\d+/, \"\");\n}\n\nfunction toHex(bytes: Uint8Array): string {\n  let s = \"\";\n  for (let i = 0; i < bytes.length; i++) {\n    s += bytes[i].toString(16).padStart(2, \"0\");\n  }\n  return s;\n}\n\n/**\n * RFC 3986-compliant percent-encoding. `encodeURIComponent` leaves `! ' ( ) *`\n * unescaped, but AWS SigV4 (and RFC 3986 reserved sub-delims) require them\n * encoded. Used for both path segments and query keys/values.\n */\nfunction rfc3986Encode(value: string): string {\n  return encodeURIComponent(value).replace(\n    /[!'()*]/g,\n    (c) => \"%\" + c.charCodeAt(0).toString(16).toUpperCase(),\n  );\n}\n\n/**\n * Encode each path segment per AWS canonical-URI rules. Slashes between segments\n * are preserved; everything else (including `+`, `=`, etc.) is percent-encoded.\n */\nfunction encodePath(key: string): string {\n  return key.split(\"/\").map(rfc3986Encode).join(\"/\");\n}\n\nfunction canonicalizeQuery(params: URLSearchParams): string {\n  const entries: [string, string][] = [];\n  for (const [k, v] of params.entries()) {\n    entries.push([k, v]);\n  }\n  entries.sort(([a], [b]) => (a < b ? -1 : a > b ? 1 : 0));\n  return entries\n    .map(([k, v]) => `${rfc3986Encode(k)}=${rfc3986Encode(v)}`)\n    .join(\"&\");\n}\n\ninterface ListObject {\n  key: string;\n  size: number;\n  lastModified: Date;\n}\n\nfunction parseListObjects(xml: string): ListObject[] {\n  const out: ListObject[] = [];\n  const contentsRe = /<Contents>([\\s\\S]*?)<\\/Contents>/g;\n  let match: RegExpExecArray | null;\n  while ((match = contentsRe.exec(xml)) !== null) {\n    const block = match[1];\n    const key = matchTag(block, \"Key\");\n    const size = matchTag(block, \"Size\");\n    const lastModified = matchTag(block, \"LastModified\");\n    if (key === null) {\n      continue;\n    }\n    out.push({\n      key: decodeXmlEntities(key),\n      size: size !== null ? parseInt(size, 10) || 0 : 0,\n      lastModified:\n        lastModified !== null ? new Date(lastModified) : new Date(0),\n    });\n  }\n  return out;\n}\n\nfunction matchTag(block: string, tag: string): string | null {\n  const re = new RegExp(`<${tag}>([\\\\s\\\\S]*?)<\\\\/${tag}>`);\n  const m = re.exec(block);\n  return m === null ? null : m[1];\n}\n\nfunction decodeXmlEntities(s: string): string {\n  return s\n    .replace(/&amp;/g, \"&\")\n    .replace(/&lt;/g, \"<\")\n    .replace(/&gt;/g, \">\")\n    .replace(/&quot;/g, '\"')\n    .replace(/&apos;/g, \"'\");\n}\n\nfunction randomSuffix(): string {\n  return Math.random().toString(36).slice(2, 10);\n}\n\nasync function safeText(response: Response): Promise<string> {\n  try {\n    return await response.text();\n  } catch {\n    return \"\";\n  }\n}\n\nfunction wrapError(error: unknown, code: string, provider: string): Error {\n  if (error instanceof StorageError) {\n    return error;\n  }\n  return new StorageError(\n    `R2 error: ${error instanceof Error ? error.message : \"Unknown error\"}`,\n    code,\n    provider,\n  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