diff --git a/README.md b/README.md
index 6402e15..ff8c2f9 100644
--- a/README.md
+++ b/README.md
@@ -7,9 +7,9 @@ BDContract SDK for Node.js and browsers.
 `npm install @bdware/bdcontract-sdk`
 
 ```typescript
-import { Client } from '@bdware/bdcontract-sdk'
+import { WsClient } from '@bdware/bdcontract-sdk'
 import { sm2 } from 'sm-crypto'
-const client = new Client(
+const client = new WsClient(
   url,
   (ev) => {
     console.log(JSON.stringify(ev))
@@ -42,7 +42,7 @@ function print(string) {
 
 const url = 'ws://021.node.internetapi.cn:21030/SCIDE/SCExecutor'
 
-const client = new bdcontract.Client(
+const client = new bdcontract.WsClient(
   url,
   (ev) => {
     console.log(JSON.stringify(ev))
@@ -76,4 +76,4 @@ async function anotherPlace() {
     // In another place, wait for login to complete
     const success = await client.Loggedin()
 }()
-```
+```
\ No newline at end of file
diff --git a/package.json b/package.json
index 7490d08..2334ea3 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@bdware/bdcontract-sdk",
-  "version": "0.3.0-alpha.15",
+  "version": "0.4.0-beta",
   "description": "BDContract SDK for Node.js and browsers",
   "license": "MIT",
   "keywords": [
@@ -47,14 +47,5 @@
     "shx": "^0.3.4",
     "sucrase": "^3.25.0",
     "typescript": "^4.8.2"
-  },
-  "directories": {
-    "lib": "lib",
-    "test": "test"
-  },
-  "repository": {
-    "type": "git",
-    "url": "git@gitea.internetapi.cn:bdware/bdcontract-sdk-javascript.git"
-  },
-  "author": "caihq@pku.edu.cn"
+  }
 }
diff --git a/src/httpClient.ts b/src/httpClient.ts
index 5107ca6..27bcdb9 100644
--- a/src/httpClient.ts
+++ b/src/httpClient.ts
@@ -26,19 +26,40 @@ const genUrlParamsFromObject = (obj: Record<string, unknown>): string => {
 
 export * from './types'
 
+export const retryAsyncN =
+  (maxRetries: number) =>
+  async <Ret>(fn: () => Promise<Ret>) => {
+    let i = 0
+    while (true)
+      try {
+        return await fn()
+      } catch (e) {
+        if (i++ === maxRetries) {
+          throw e
+        }
+      }
+  }
+
 export class HttpClient {
   private fetch: (input: RequestInfo, init?: RequestInit) => Promise<Response>
+  private retryAsync: <Ret>(fn: () => Promise<Ret>) => Promise<Ret>
 
   constructor(
     private baseUrl: string,
     private sm2Key: KeyPairHex,
-    config = {} as AxiosRequestConfig,
+    options: {
+      axios: AxiosRequestConfig
+      maxRetries: number
+    } = {
+      axios: {},
+      maxRetries: 3,
+    },
   ) {
     const axiosInstance = axios.create({
       baseURL: 'https://some-domain.com/api/',
       timeout: 10000,
       // headers: {'X-Custom-Header': 'foobar'}
-      ...config,
+      ...options.axios,
     })
 
     this.fetch = buildAxiosFetch(
@@ -47,6 +68,8 @@ export class HttpClient {
       return config;
     } */,
     )
+
+    this.retryAsync = retryAsyncN(options.maxRetries)
   }
 
   async requestWithSignature<Data>(
@@ -107,7 +130,6 @@ export class HttpClient {
         .catch((err) => {
           // const clientRes = err as unknown as ClientResponse<Data>
           // clientRes.data = (await err.text()) as Data
-          // console.log(err,'errerrerrerrerrerrerrerrerrerrerrerrerrerrerr')
           setTimeout(() => {
             reject(err)
           }, 1)
@@ -115,22 +137,6 @@ export class HttpClient {
     })
   }
 
-  async retryRequestWithSignature<Data>(retryTimes: number, path: string, init?: Partial<RequestInit>, sm2Key?: KeyPairHex ) {
-   let err: Error = new Error()
-    for (let i = 0; i<retryTimes; i++) {
-      try{
-        return await this.requestWithSignature<Data>(path, init, sm2Key)
-      } catch (e) {
-        if (i < retryTimes) {
-          console.log('1')
-          continue
-        }
-        err = e as Error
-      }
-    }
-    throw err
-  }
-
   sign(data: string, privateKey?: string): string {
     return sm2.doSignature(data, privateKey ?? this.sm2Key.privateKey, {
       hash: true,
@@ -141,15 +147,17 @@ export class HttpClient {
   // ping
   // https://public.internetapi.cn/docs/bdcontract/doc/ContractAPI.html#id15
   ping(): Promise<PingResponse> {
-    return this.requestWithSignature('/SCManager?action=ping')
+    return this.retryAsync(() =>
+      this.requestWithSignature('/SCManager?action=ping'),
+    )
   }
 
   // 启动合约
   // https://public.internetapi.cn/docs/bdcontract/doc/ContractAPI.html#id60
   startContract(code: string): Promise<ClientResponse<string>> {
     const params = { action: 'startContract', script: code }
-    return this.requestWithSignature(
-      `/SCManager?${genUrlParamsFromObject(params)}`,
+    return this.retryAsync(() =>
+      this.requestWithSignature(`/SCManager?${genUrlParamsFromObject(params)}`),
     )
   }
 
@@ -158,21 +166,23 @@ export class HttpClient {
   startContractByYPK(
     _request: StartContractByYpkRequest,
   ): Promise<ClientResponse<string>> {
-    return this.requestWithSignature(
-      `/SCManager?${genUrlParamsFromObject({
-        action: 'startContractByYPK',
-        ..._request,
-        owner: this.sm2Key.publicKey,
-        aim: 'onStartContract',
-        signature: sm2.doSignature(
-          `Fixed|${_request.path}|${this.sm2Key.publicKey}`,
-          this.sm2Key.privateKey,
-          {
-            hash: true,
-            der: true,
-          },
-        ),
-      })}`,
+    return this.retryAsync(() =>
+      this.requestWithSignature(
+        `/SCManager?${genUrlParamsFromObject({
+          action: 'startContractByYPK',
+          ..._request,
+          owner: this.sm2Key.publicKey,
+          aim: 'onStartContract',
+          signature: sm2.doSignature(
+            `Fixed|${_request.path}|${this.sm2Key.publicKey}`,
+            this.sm2Key.privateKey,
+            {
+              hash: true,
+              der: true,
+            },
+          ),
+        })}`,
+      ),
     )
   }
 
@@ -214,17 +224,17 @@ export class HttpClient {
         ),
       }
     }
-
-    return this.retryRequestWithSignature(
-      3,
-      `/SCManager${
-        method === 'GET' ? `?${genUrlParamsFromObject(request)}` : ''
-      }`,
-      {
-        method,
-        // eslint-disable-next-line  @typescript-eslint/consistent-type-assertions
-        ...(method === 'POST' ? ({ body: request } as Request) : {}),
-      },
+    return this.retryAsync(() =>
+      this.requestWithSignature(
+        `/SCManager${
+          method === 'GET' ? `?${genUrlParamsFromObject(request)}` : ''
+        }`,
+        {
+          method,
+          // eslint-disable-next-line  @typescript-eslint/consistent-type-assertions
+          ...(method === 'POST' ? ({ body: request } as Request) : {}),
+        },
+      ),
     )
   }
 
@@ -239,8 +249,10 @@ export class HttpClient {
       id: contractID,
     }
     requestID && (_request.requestID = requestID!)
-    return this.requestWithSignature(
-      `/SCManager?${genUrlParamsFromObject(_request)}`,
+    return this.retryAsync(() =>
+      this.requestWithSignature(
+        `/SCManager?${genUrlParamsFromObject(_request)}`,
+      ),
     )
   }
 
@@ -248,7 +260,9 @@ export class HttpClient {
   // 地址 http://39.104.205.122:18010/SCIDE
   // https://public.internetapi.cn/docs/bdcontract/doc/ContractAPI.html#id131
   killAllContract(): Promise<ClientResponse<string>> {
-    return this.requestWithSignature('/SCManager?action=killAllContract')
+    return this.retryAsync(() =>
+      this.requestWithSignature('/SCManager?action=killAllContract'),
+    )
   }
 
   // 申请角色
@@ -260,8 +274,10 @@ export class HttpClient {
       action: 'applyNodeRole',
       role,
     }
-    return this.requestWithSignature(
-      `/SCManager?${genUrlParamsFromObject(_request)}`,
+    return this.retryAsync(() =>
+      this.requestWithSignature(
+        `/SCManager?${genUrlParamsFromObject(_request)}`,
+      ),
     )
   }
 
@@ -277,10 +293,12 @@ export class HttpClient {
       isAccept,
       authorizedPubKey,
     }
-    return this.requestWithSignature(
-      `/SCManager?${genUrlParamsFromObject(_request)}`,
-      undefined,
-      managerPair,
+    return this.retryAsync(() =>
+      this.requestWithSignature(
+        `/SCManager?${genUrlParamsFromObject(_request)}`,
+        undefined,
+        managerPair,
+      ),
     )
   }
 
@@ -332,22 +350,26 @@ export class HttpClient {
   }
 
   saveFile(_request: SaveFileRequest): Promise<ClientResponse<string>> {
-    return this.requestWithSignature(
-      `/SCManager?${genUrlParamsFromObject({
-        action: 'saveFile',
-        ..._request,
-      })}`,
+    return this.retryAsync(() =>
+      this.requestWithSignature(
+        `/SCManager?${genUrlParamsFromObject({
+          action: 'saveFile',
+          ..._request,
+        })}`,
+      ),
     )
   }
 
   listProjectPermission(
     _request: ListProjectPermissionRequest,
   ): Promise<ClientResponse<ListProjectPermissionResponseData>> {
-    return this.requestWithSignature(
-      `/SCManager?${genUrlParamsFromObject({
-        action: 'listProjectPermission',
-        ..._request,
-      })}`,
+    return this.retryAsync(() =>
+      this.requestWithSignature(
+        `/SCManager?${genUrlParamsFromObject({
+          action: 'listProjectPermission',
+          ..._request,
+        })}`,
+      ),
     )
   }
 
@@ -368,22 +390,31 @@ export class HttpClient {
       isPrivate,
       sponsorPeerID,
     }
-    return this.requestWithSignature(
-      `/SCManager?${genUrlParamsFromObject({
-        action: 'startContractMultiPoint',
-        ..._request,
-      })}`,
+    return this.retryAsync(() =>
+      this.requestWithSignature(
+        `/SCManager?${genUrlParamsFromObject({
+          action: 'startContractMultiPoint',
+          ..._request,
+        })}`,
+      ),
     )
   }
 
   // 获取节点配置信息
   async loadNodeConfig(): Promise<ClientResponse<LoadNodeConfigResponseData>> {
-    const res = await this.requestWithSignature<string>(
-      `/SCManager?${genUrlParamsFromObject({
-        action: 'loadNodeConfig',
-      })}`,
+    const res = await this.retryAsync(() =>
+      this.requestWithSignature<string>(
+        `/SCManager?${genUrlParamsFromObject({
+          action: 'loadNodeConfig',
+        })}`,
+      ),
     )
-    return { ...res, data: (res.status === 200 && res.data ? JSON.parse( res.data).data : {}) as LoadNodeConfigResponseData}
+    return {
+      ...res,
+      data: (res.status === 200 && res.data
+        ? JSON.parse(res.data).data
+        : {}) as LoadNodeConfigResponseData,
+    }
   }
 
   // 支持的key包括：{licence，projectDir，yjsPath，dataChain，doipConfig，nodeCenter，nodeName，masterAddress，resetNodeCenterWS}
@@ -391,21 +422,25 @@ export class HttpClient {
     key: string,
     val: string,
   ): Promise<ClientResponse<boolean>> {
-    return this.requestWithSignature(
-      `/SCManager?${genUrlParamsFromObject({
-        action: 'updateConfig',
-        key,
-        val,
-      })}`,
+    return this.retryAsync(() =>
+      this.requestWithSignature(
+        `/SCManager?${genUrlParamsFromObject({
+          action: 'updateConfig',
+          key,
+          val,
+        })}`,
+      ),
     )
   }
 
   // 设置pubkey为node manager
   async resetNodeManager(): Promise<boolean> {
-    const res = await this.requestWithSignature<string>(
-      `/SCManager?${genUrlParamsFromObject({
-        action: 'resetNodeManager',
-      })}`,
+    const res = await this.retryAsync(() =>
+      this.requestWithSignature<string>(
+        `/SCManager?${genUrlParamsFromObject({
+          action: 'resetNodeManager',
+        })}`,
+      ),
     )
     if (!res.data) {
       return false
@@ -416,38 +451,46 @@ export class HttpClient {
 
   // 锁定某个用户的的私有目录编辑功能
   lockEdit(): Promise<ClientResponse<string>> {
-    return this.requestWithSignature(
-      `/SCManager?${genUrlParamsFromObject({
-        action: 'lockEdit',
-      })}`,
+    return this.retryAsync(() =>
+      this.requestWithSignature(
+        `/SCManager?${genUrlParamsFromObject({
+          action: 'lockEdit',
+        })}`,
+      ),
     )
   }
 
   // 解锁某个用户的的私有目录编辑功能
   unlockEdit(): Promise<ClientResponse<string>> {
-    return this.requestWithSignature(
-      `/SCManager?${genUrlParamsFromObject({
-        action: 'unlockEdit',
-      })}`,
+    return this.retryAsync(() =>
+      this.requestWithSignature(
+        `/SCManager?${genUrlParamsFromObject({
+          action: 'unlockEdit',
+        })}`,
+      ),
     )
   }
 
   addNode(nodePubKey: string): Promise<ClientResponse<string>> {
-    return this.requestWithSignature(
-      `?${genUrlParamsFromObject({
-        action: 'addNode',
-        nodePubKey,
-      })}`,
+    return this.retryAsync(() =>
+      this.requestWithSignature(
+        `?${genUrlParamsFromObject({
+          action: 'addNode',
+          nodePubKey,
+        })}`,
+      ),
     )
   }
 
   // 申请角色
   applyRole(role: string): Promise<ClientResponse<string>> {
-    return this.requestWithSignature(
-      `?${genUrlParamsFromObject({
-        action: 'applyRole',
-        role,
-      })}`,
+    return this.retryAsync(() =>
+      this.requestWithSignature(
+        `?${genUrlParamsFromObject({
+          action: 'applyRole',
+          role,
+        })}`,
+      ),
     )
   }
 
@@ -455,29 +498,35 @@ export class HttpClient {
     isAccept: boolean,
     authorizedPubKey: string,
   ): Promise<ClientResponse<string>> {
-    return this.requestWithSignature(
-      `?${genUrlParamsFromObject({
-        action: 'authNodeManager',
-        isAccept,
-        authorizedPubKey,
-      })}`,
+    return this.retryAsync(() =>
+      this.requestWithSignature(
+        `?${genUrlParamsFromObject({
+          action: 'authNodeManager',
+          isAccept,
+          authorizedPubKey,
+        })}`,
+      ),
     )
   }
 
   listAllUsers(): Promise<ClientResponse<ListAllUsersResponseData>> {
-    return this.requestWithSignature(
-      `?${genUrlParamsFromObject({
-        action: 'listAllUsers',
-      })}`,
+    return this.retryAsync(() =>
+      this.requestWithSignature(
+        `?${genUrlParamsFromObject({
+          action: 'listAllUsers',
+        })}`,
+      ),
     )
   }
 
   // 查看节点列表
   listNodes(): Promise<ListNodesResponse> {
-    return this.requestWithSignature(
-      `?${genUrlParamsFromObject({
-        action: 'listNodes',
-      })}`,
+    return this.retryAsync(() =>
+      this.requestWithSignature(
+        `?${genUrlParamsFromObject({
+          action: 'listNodes',
+        })}`,
+      ),
     ) as unknown as Promise<ListNodesResponse>
   }
 
@@ -502,30 +551,36 @@ export class HttpClient {
         '04303718771b9323c204e607639f14469f9a94e55b0964a408ad3b3864b0493b645d7070da0d550f0c54b934275a8e88dedc3024467b0566db5c1108b1baeaae27',
       sign: sig,
     }
-    return (await this.requestWithSignature('', {
-      method: 'POST',
-      headers: {
-        'Content-Type': 'application/json',
-      },
-      body: JSON.stringify(body),
-    })) as unknown as { action: string; status: string }
+    return (await this.retryAsync(() =>
+      this.requestWithSignature('', {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+        body: JSON.stringify(body),
+      }),
+    )) as unknown as { action: string; status: string }
   }
 
   // 查看可信执行集群列表
   listTrustUnits(): Promise<ClientResponse<{ key: string; value: string }[]>> {
-    return this.requestWithSignature(
-      `?${genUrlParamsFromObject({
-        action: 'listTrustUnits',
-      })}`,
+    return this.retryAsync(() =>
+      this.requestWithSignature(
+        `?${genUrlParamsFromObject({
+          action: 'listTrustUnits',
+        })}`,
+      ),
     )
   }
 
   // listContractProcess   查询合约实例列表
   listContractProcess(): Promise<ClientResponse<string>> {
-    return this.requestWithSignature(
-      `/SCManager?${genUrlParamsFromObject({
-        action: 'listContractProcess',
-      })}`,
+    return this.retryAsync(() =>
+      this.requestWithSignature(
+        `/SCManager?${genUrlParamsFromObject({
+          action: 'listContractProcess',
+        })}`,
+      ),
     )
   }
 
@@ -533,7 +588,7 @@ export class HttpClient {
   downloadContract(
     projectName: string,
     isPrivate: boolean,
-    timestamp: number
+    timestamp: number,
   ): Promise<ClientResponse<string>> {
     const _request = {
       action: 'downloadContract',
@@ -541,19 +596,22 @@ export class HttpClient {
       isPrivate,
       timestamp,
     }
-    return this.requestWithSignature(
-      `/CMManager?${genUrlParamsFromObject(_request)}`)
+    return this.retryAsync(() =>
+      this.requestWithSignature(
+        `/CMManager?${genUrlParamsFromObject(_request)}`,
+      ),
+    )
   }
 
   // 配置合约引擎节点，若节点没有设置过node manager，将当前key设置为node manager
-  async configNode(
-    args: ConfigNodeArgs,
-  ): Promise<boolean> {
+  async configNode(args: ConfigNodeArgs): Promise<boolean> {
     if (!(await this.resetNodeManager())) {
       return false
     }
 
-    const kvs: [string, string][] = Object.entries(args).filter(([_k, v]) => v) as [string, string][]
+    const kvs: [string, string][] = Object.entries(args).filter(
+      ([_k, v]) => v,
+    ) as [string, string][]
 
     await Promise.all([
       ...kvs.map(([k, v]) => this.updateConfig(k, v!)),