diff --git a/src/modules/app.ts b/src/modules/app.ts
index 23932b1..04233f9 100644
--- a/src/modules/app.ts
+++ b/src/modules/app.ts
@@ -1,111 +1,9 @@
 import { SetOperation } from "@ainblockchain/ain-js/lib/types";
 import { Path } from "../constants";
-import { appBillingConfig, setDefaultFlag, setRuleParam, setTriggerFunctionParm, triggerFunctionConfig } from "../types/type";
+import { appBillingConfig, setRuleParam, setTriggerFunctionParm, triggerFunctionConfig } from "../types/type";
 import { buildSetOperation } from "../utils/builder";
 import ModuleBase from "./moduleBase";
 
-// FIXME(yoojin): move to constant.
-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: {
-        ".rule": {
-          write: "data === null && util.isNumber(newData) && getValue(`/transfer/` + $userAddress + `/` + getValue(`/apps/" + `${appName}` + "/billingConfig/depositAddress`) + `/` + $transferKey + `/value`) === newData"
-        }
-      }
-    },
-    balance: {
-      ref: Path.app(appName).balanceOfUser("$userAddress"),
-      value: {
-        ".rule": {
-          write: "(util.isAppAdmin(`" + `${appName}` + "`, auth.addr, getValue) === true) && util.isNumber(newData)"
-        }
-      }
-    },
-    balanceHistory: {
-      ref: `${rootRef}/balance/$userAddress/history/$timestamp_and_type`,
-      value: {
-        ".rule": {
-          write: "util.isAppAdmin(`" + `${appName}` + "`, auth.addr, getValue) === true && util.isDict(newData) && util.isNumber(newData.amount) && (newData.type === 'DEPOSIT' || newData.type === 'USAGE')"
-        }
-      }
-    },
-    request: {
-      ref: Path.app(appName).request("$serviceName", "$userAddress", "$requestKey"),
-      value: {
-        ".rule": {
-          write: 
-            "auth.addr === $userAddress && getValue(`/apps/" + `${appName}` + "/balance/` + $userAddress + `/balance`) !== null && " +
-            "((getValue(`/apps/" + `${appName}` + "/billingConfig/` + $serviceName) !== null) && (getValue(`/apps/" + `${appName}` + "/balance/` + $userAddress + `/balance`)  >= getValue(`/apps/" + `${appName}` + "/billingConfig/` + $serviceName + `/minCost`)) || " +
-            "getValue(`/apps/" + `${appName}` + "/balance/` + $userAddress + `/balance`) >= getValue(`/apps/" + `${appName}` + "/billingConfig/service/default/minCost`)" 
-        }
-      }
-    },
-    response: {
-      ref: Path.app(appName).response("$serviceName", "userAddress", "$requestKey"),
-      value: {
-        ".rule": {
-          write: "util.isAppAdmin(`" + `${appName}` + "`, auth.addr, getValue) === true && util.isDict(newData) && util.isString(newData.status)"
-        }
-      },
-    },
-    billingConfig: {
-      ref: Path.app(appName).billingConfig(),
-      value: {
-        ".rule": {
-          write: "util.isAppAdmin(`" + `${appName}` + "`, auth.addr, getValue) === true && util.isDict(newData) && " +
-          "util.isString(newData.depositAddress) && util.isDict(newData.service) && util.isDict(newData.service.default)",
-        }
-      }
-    },
-    billingConfigOfService: {
-      ref: Path.app(appName).billingConfigOfService("$serviceName"),
-      value: {
-        ".rule": {
-          write: "util.isAppAdmin(`" + `${appName}` + "`, auth,addr, getValue) === true && util.isDict(newData) && util.isNumber(newData.minCost)",
-        }
-      }
-    }
-  }
-}
-
-const defaultAppFunctions = (appName: string) => {
-  return {
-    deposit: (url: string) => {
-      return {
-        ref: `${Path.app(appName).depositOfUser("$userAddress")}/$transferKey`,
-        function_type: "REST",
-        function_id: "deposit-trigger",
-        function_url: url,
-      }
-    },
-    service: (url: string) => {
-      return {
-        ref: Path.app(appName).request("$serviceName", "$userAddress", "$requestKey"),
-        function_type: "REST",
-        function_id: "service-trigger",
-        function_url: url,
-      }
-    }
-  }
-}
-
-// FIXME(yoojin): move to types.
-// NOTE(yoojin): temporary type. service url may be changed to array?
-interface TriggerFunctionUrlMap {
-  [type: string]: string
-}
-
 export default class App extends ModuleBase {
   /**
    * Create App for your AI Service on AI Network.
@@ -115,31 +13,24 @@ export default class App extends ModuleBase {
    * @returns Result of transaction.
    */
   // FIXME(yoojin): need to fix getting function urls.
-  async create(appName: string, functionUrls: TriggerFunctionUrlMap, setDefaultFlag?: setDefaultFlag) {
-    if (!setDefaultFlag)
-      setDefaultFlag = { triggerFuncton: true };
+  async create(appName: string, serviceUrl: string) {
     const setRuleOps: SetOperation[] = [];
     const setFunctionOps: SetOperation[] = [];
     const setBillingConfigOps: SetOperation[] = [] ;
 
     const createAppOp = this.buildCreateAppOp(appName);
-    const defaultRules = defaultAppRules(appName);
+    const defaultRules = this.defaultAppRules(appName);
     for (const rule of Object.values(defaultRules)) {
       const { ref, value } = rule;
       const ruleOp = buildSetOperation("SET_RULE", ref, value);
       setRuleOps.push(ruleOp);
     }
 
-    if (setDefaultFlag.triggerFuncton) {
-      const defaultFunctions = defaultAppFunctions(appName);
-      for (const [type, func] of Object.entries(defaultFunctions)) {
-        const { ref, function_id, function_type, function_url } = func(functionUrls[type]);
-        const value = this.buildSetFunctionValue({function_id, function_type, function_url});
-        const funcOp = buildSetOperation("SET_FUNCTION", ref, value);
-        setFunctionOps.push(funcOp);
-      }
-    }
-
+    const depositParam = this.depositTriggerFunctionConfig(appName, serviceUrl);
+    const value = this.buildSetFunctionValue(depositParam);
+    const funcOp = buildSetOperation("SET_FUNCTION", depositParam.ref, value);
+    setFunctionOps.push(funcOp);
+  
     const defaultConfig: appBillingConfig = {
       depositAddress: this.ain.wallet.defaultAccount!.address,
       service: {
@@ -190,10 +81,9 @@ export default class App extends ModuleBase {
    */
   async setTriggerFunctions(appName: string, functions: setTriggerFunctionParm[]) {
     const setFunctionOps: SetOperation[] = [];
-    for (const func of Object.values(functions)) {
-      const { ref } = func;
-      const value = this.buildSetFunctionValue(func);
-      const op = buildSetOperation("SET_FUNCTION", ref, value);
+    for (const param of Object.values(functions)) {
+      const value = this.buildSetFunctionValue(param);
+      const op = buildSetOperation("SET_FUNCTION", param.ref, value);
       setFunctionOps.push(op);
     }
     if (setFunctionOps.length <= 0) {
@@ -288,4 +178,87 @@ export default class App extends ModuleBase {
     const value = !isRemoveOp ? null : true;
     return buildSetOperation("SET_VALUE", path, value);
   }
+
+  private 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: {
+          ".rule": {
+            write: "data === null && util.isNumber(newData) && getValue(`/transfer/` + $userAddress + `/` + getValue(`/apps/" + `${appName}` + "/billingConfig/depositAddress`) + `/` + $transferKey + `/value`) === newData"
+          }
+        }
+      },
+      balance: {
+        ref: Path.app(appName).balanceOfUser("$userAddress"),
+        value: {
+          ".rule": {
+            write: "(util.isAppAdmin(`" + `${appName}` + "`, auth.addr, getValue) === true) && util.isNumber(newData)"
+          }
+        }
+      },
+      balanceHistory: {
+        ref: `${rootRef}/balance/$userAddress/history/$timestamp_and_type`,
+        value: {
+          ".rule": {
+            write: "util.isAppAdmin(`" + `${appName}` + "`, auth.addr, getValue) === true && util.isDict(newData) && util.isNumber(newData.amount) && (newData.type === 'DEPOSIT' || newData.type === 'USAGE')"
+          }
+        }
+      },
+      request: {
+        ref: Path.app(appName).request("$serviceName", "$userAddress", "$requestKey"),
+        value: {
+          ".rule": {
+            write: 
+              "auth.addr === $userAddress && getValue(`/apps/" + `${appName}` + "/balance/` + $userAddress + `/balance`) !== null && " +
+              "((getValue(`/apps/" + `${appName}` + "/billingConfig/` + $serviceName) !== null) && (getValue(`/apps/" + `${appName}` + "/balance/` + $userAddress + `/balance`)  >= getValue(`/apps/" + `${appName}` + "/billingConfig/` + $serviceName + `/minCost`)) || " +
+              "getValue(`/apps/" + `${appName}` + "/balance/` + $userAddress + `/balance`) >= getValue(`/apps/" + `${appName}` + "/billingConfig/service/default/minCost`)" 
+          }
+        }
+      },
+      response: {
+        ref: Path.app(appName).response("$serviceName", "userAddress", "$requestKey"),
+        value: {
+          ".rule": {
+            write: "util.isAppAdmin(`" + `${appName}` + "`, auth.addr, getValue) === true && util.isDict(newData) && util.isString(newData.status)"
+          }
+        },
+      },
+      billingConfig: {
+        ref: Path.app(appName).billingConfig(),
+        value: {
+          ".rule": {
+            write: "util.isAppAdmin(`" + `${appName}` + "`, auth.addr, getValue) === true && util.isDict(newData) && " +
+            "util.isString(newData.depositAddress) && util.isDict(newData.service) && util.isDict(newData.service.default)",
+          }
+        }
+      },
+      billingConfigOfService: {
+        ref: Path.app(appName).billingConfigOfService("$serviceName"),
+        value: {
+          ".rule": {
+            write: "util.isAppAdmin(`" + `${appName}` + "`, auth,addr, getValue) === true && util.isDict(newData) && util.isNumber(newData.minCost)",
+          }
+        }
+      }
+    }
+  }
+
+  private depositTriggerFunctionConfig = (appName: string, serviceUrl: string): setTriggerFunctionParm => {
+    return {
+      ref: `${Path.app(appName).depositOfUser("$userAddress")}/$transferKey`,
+      function_type: "REST",
+      function_id: "deposit-trigger",
+      function_url: `${serviceUrl}/deposit`,
+    }
+  }
 }
diff --git a/src/types/type.ts b/src/types/type.ts
index 4041af1..b16c174 100644
--- a/src/types/type.ts
+++ b/src/types/type.ts
@@ -1,24 +1,19 @@
-export type setDefaultFlag = {
-  triggerFuncton: boolean,
-};
-
-// NOTE(yoojin): pls suggest good name.
 export type triggerFunctionConfig = {
-  function_type: string,
-  function_url: string,
-  function_id: string,
+  function_type: string;
+  function_url: string;
+  function_id: string;
 };
 
 export type setTriggerFunctionParm = {
-  ref: string
+  ref: string;
 } & triggerFunctionConfig;
 
 export type writeRuleConfig = {
-  write: string,
+  write: string;
 };
 
 export type setRuleParam = {
-  ref: string
+  ref: string;
 } & writeRuleConfig;
 
 export type serviceBillingConfig = {
@@ -41,9 +36,9 @@ export enum HISTORY_TYPE {
 }
 
 export type opResult = {
-  code: number,
+  code: number;
   bandwidth_gas_amount: number;
-  message?: string
+  message?: string;
 }
 
 export type txResult = {