add userdata service client

packages/services/userdata/CHANGELOG.md

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+# @0xsequence/userdata

packages/services/userdata/README.md

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+# @0xsequence/userdata
+
+See [0xsequence project page](https://github.com/0xsequence/sequence.js).

packages/services/userdata/package.json

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+{
+  "name": "@0xsequence/userdata",
+  "version": "3.0.0-beta.4",
+  "description": "userdata sub-package for Sequence",
+  "repository": "https://github.com/0xsequence/sequence.js/tree/master/packages/services/userdata",
+  "author": "Sequence Platforms Inc.",
+  "license": "Apache-2.0",
+  "publishConfig": {
+    "access": "public"
+  },
+  "scripts": {
+    "build": "tsc",
+    "dev": "tsc --watch",
+    "test": "echo",
+    "typecheck": "tsc --noEmit"
+  },
+  "exports": {
+    ".": {
+      "types": "./dist/index.d.ts",
+      "default": "./dist/index.js"
+    }
+  },
+  "devDependencies": {
+    "@repo/typescript-config": "workspace:^",
+    "@types/node": "^24.10.1",
+    "typescript": "^5.9.3"
+  }
+}

packages/services/userdata/src/index.ts

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+export * from './userdata.gen'
+
+import { UserData as UserdataRpc } from './userdata.gen'
+
+export class SequenceUserdataClient extends UserdataRpc {
+  constructor(
+    hostname: string,
+    public projectAccessKey?: string,
+    public jwtAuth?: string,
+  ) {
+    super(hostname.endsWith('/') ? hostname.slice(0, -1) : hostname, fetch)
+    this.fetch = this._fetch
+  }
+
+  _fetch = (input: RequestInfo, init?: RequestInit): Promise<Response> => {
+    // automatically include jwt and access key auth header to requests
+    // if its been set on the api client
+    const headers: { [key: string]: any } = {}
+
+    const jwtAuth = this.jwtAuth
+    const projectAccessKey = this.projectAccessKey
+
+    if (jwtAuth && jwtAuth.length > 0) {
+      headers['Authorization'] = `BEARER ${jwtAuth}`
+    }
+
+    if (projectAccessKey && projectAccessKey.length > 0) {
+      headers['X-Access-Key'] = projectAccessKey
+    }
+
+    // before the request is made
+    init!.headers = { ...init!.headers, ...headers }
+
+    return fetch(input, init)
+  }
+}