diff --git a/README.md b/README.md
index 3d7d0a8..8373db3 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
-# ainize-sdk
+# ainize-js
 
-A Typescript SDK for the Ainize, a system for running AI services on the AI Network.
+A Typescript JS for the Ainize, a system for running AI services on the AI Network.
 
 ## Requirements
 node >= 16
@@ -8,14 +8,14 @@ node >= 16
 ## usage
 ### Install
 ```bash
-npm install @ainize-team/ainize-sdk
+npm install @ainize-team/ainize-js
 
-yarn install @ainize-team/ainize-sdk
+yarn install @ainize-team/ainize-js
 ```
 
 ### Import
 ```typescript
-import Ainize from '@ainize-team/ainize-sdk'
+import Ainize from '@ainize-team/ainize-js'
 const ainize = new Ainize(<CHAIN_ID>);
 ```
 
@@ -49,9 +49,9 @@ service.run();
 ```
 
 ### Using Service
-You can use a service using `ainize.service(<SERVICE_NAME>)`.
+You can use a service using `ainize.getService(<SERVICE_NAME>)`.
 ```typescript
-const service = await ainize.service(<SERVICE_NAME>);
+const service = await ainize.getService(<SERVICE_NAME>);
 ```
 
 You should deposit AIN to credit before using service.
@@ -62,5 +62,5 @@ const balance = await service.getCreditBalance();
 
 If you have enough credit, you can use the service.
 ```typescript
-const result = await service.use(<REQUEST_DATA>);
+const result = await service.request(<REQUEST_DATA>);
 ``` 
diff --git a/package.json b/package.json
index 124a460..bb1727b 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
-  "name": "@ainize-team/ainize-sdk",
-  "version": "1.0.3",
+  "name": "@ainize-team/ainize-js",
+  "version": "1.0.4",
   "main": "dist/ainize.js",
   "types": "dist/ainize.d.ts",
   "scripts": {
@@ -14,7 +14,7 @@
   },
   "repository": {
     "type": "git",
-    "url": "git+https://github.com/ainize-team/ainize-sdk.git"
+    "url": "git+https://github.com/ainize-team/ainize-js.git"
   },
   "keywords": [
     "ainize",
diff --git a/src/constants.ts b/src/constants.ts
index 9921d87..7552df4 100644
--- a/src/constants.ts
+++ b/src/constants.ts
@@ -31,14 +31,6 @@ export const Path = {
 export const defaultAppRules = (appName: string): { [type: string]: { ref: string, value: object } } => {
   const rootRef = Path.app(appName).root();
   return {
-    root: {
-      ref: rootRef,
-      value: {
-        ".rule": {
-          write: "util.isAppAdmin(`" + `${appName}` + "`, auth.addr, getValue) === true"
-        },
-      },
-    },
     deposit: {
       ref: `${Path.app(appName).depositOfUser("$userAddress")}/$transferKey`,
       value: {
@@ -56,7 +48,7 @@ export const defaultAppRules = (appName: string): { [type: string]: { ref: strin
       },
     },
     balanceHistory: {
-      ref: `${rootRef}/balance/$userAddress/history/$timestamp_and_type`,
+      ref: `${rootRef}/balance/$userAddress/history/$timestamp`,
       value: {
         ".rule": {
           write: "util.isAppAdmin(`" + `${appName}` + "`, auth.addr, getValue) === true && util.isDict(newData) && util.isNumber(newData.amount) && (newData.type === 'DEPOSIT' || newData.type === 'USAGE')"
@@ -68,7 +60,8 @@ export const defaultAppRules = (appName: string): { [type: string]: { ref: strin
       value: {
         ".rule": {
           write: 
-            "auth.addr === $userAddress && getValue(`/apps/" + `${appName}` + "/balance/` + $userAddress + `/balance`) !== null && " +
+            "auth.addr === $userAddress && " +
+            "(getValue(`/apps/" + `${appName}` + "/billingConfig/minCost`) === 0 || " +
             "(getValue(`/apps/" + `${appName}` + "/balance/` + $userAddress + `/balance`)  >= getValue(`/apps/" + `${appName}` + "/billingConfig/minCost`))"
         },
       },
@@ -85,9 +78,12 @@ export const defaultAppRules = (appName: string): { [type: string]: { ref: strin
       ref: Path.app(appName).billingConfig(),
       value: {
         ".rule": {
-          write: "util.isAppAdmin(`" + `${appName}` + "`, auth.addr, getValue) === true && util.isDict(newData) && util.isString(newData.depositAddress) && " + 
-          "util.isDict(newData) && util.isNumber(newData.costPerToken) && util.isNumber(newData.minCost) && " + 
-          "util.isEmpty(newData.maxCost) || (util.isNumber(newData.maxCost) && newData.maxCost >= newData.minCost)",
+          write: "util.isAppAdmin(`" + `${appName}` + "`, auth.addr, getValue) === true && " +
+          "util.isDict(newData) && " + 
+          "util.isString(newData.depositAddress) && " + 
+          "util.isNumber(newData.costPerToken) && " + 
+          "util.isNumber(newData.minCost) && newData.minCost >= 0 &&" + 
+          "(util.isEmpty(newData.maxCost) || (util.isNumber(newData.maxCost) && newData.maxCost >= newData.minCost))",
         },
       },
     },
diff --git a/src/controllers/serviceController.ts b/src/controllers/serviceController.ts
index a21c0d0..f5bbfbe 100644
--- a/src/controllers/serviceController.ts
+++ b/src/controllers/serviceController.ts
@@ -34,7 +34,8 @@ export default class ServiceController {
     return await 'information of service';
   }
 
-  async calculateCost(serviceName: string, requestData: string): Promise<number> {
+  // FIXME(yoojin): Temporary deprecated. Need new pricing rules.
+  private async calculateCost(serviceName: string, requestData: string): Promise<number> {
     const billingConfig = await this.ain.getValue(Path.app(serviceName).billingConfig());
     const token = requestData.split(' ').length;
     let cost = token * billingConfig.costPerToken;
@@ -76,7 +77,7 @@ export default class ServiceController {
     return await this.ain.getValue(creditHistoryPath) as creditHistories;
   }
 
-  async request(serviceName: string, requestData: string) : Promise<string> {
+  async request(serviceName: string, requestData: any) : Promise<any> {
     this.checkRunning(serviceName);
     const result = await new Promise(async (resolve, reject) => {
       const requestKey = Date.now();
diff --git a/src/service.ts b/src/service.ts
index 3a21d6e..24239da 100644
--- a/src/service.ts
+++ b/src/service.ts
@@ -31,7 +31,9 @@ export default class Service {
    * @returns {number} Estimated cost.
    */
   async calculateCost (requestData: string) {
-    return await this.serviceController.calculateCost(this.serviceName, requestData);
+    // FIXME(yoojin): Temporary deprecated. Need new pricing rules.
+    // return await this.serviceController.calculateCost(this.serviceName, requestData);
+    return 0;
   }
 
   /**
@@ -77,7 +79,7 @@ export default class Service {
    * @param {string} requestData String data for request to service. 
    * @returns {string} Response data from service.
    */
-  async request(requestData: string) {
+  async request(requestData: any) {
     this.isLoggedIn();
     return await this.serviceController.request(this.serviceName, requestData);
   }