diff --git a/worker/src/user_api/bind_address.ts b/worker/src/user_api/bind_address.ts
index 22a7b92..c21c075 100644
--- a/worker/src/user_api/bind_address.ts
+++ b/worker/src/user_api/bind_address.ts
@@ -6,6 +6,22 @@ import { unbindTelegramByAddress } from '../telegram_api/common';
 import i18n from '../i18n';
 import { updateAddressUpdatedAt, commonGetUserRole, handleListQuery, hideObjectFields } from '../common';
 
+export const getBindedAddressById = async (
+    c: Context<HonoCustomType>,
+    user_id: number | string,
+    address_id: number | string
+): Promise<string | null> => {
+    if (!user_id || !address_id) {
+        return null;
+    }
+    const address = await c.env.DB.prepare(
+        `SELECT a.name FROM users_address ua`
+        + ` JOIN address a ON a.id = ua.address_id`
+        + ` WHERE ua.user_id = ? AND ua.address_id = ?`
+    ).bind(user_id, address_id).first<string>('name');
+    return address ?? null;
+}
+
 const UserBindAddressModule = {
     bind: async (c: Context<HonoCustomType>) => {
         const { user_id } = c.get("userPayload");
@@ -158,17 +174,10 @@ const UserBindAddressModule = {
         if (!address_id || !user_id) {
             return c.text(msgs.InvalidAddressOrUserTokenMsg, 400)
         }
-        // check users_address if address binded
-        const db_user_id = await c.env.DB.prepare(
-            `SELECT user_id FROM users_address WHERE address_id = ? and user_id = ?`
-        ).bind(address_id, user_id).first("user_id");
-        if (!db_user_id) {
+        const name = await getBindedAddressById(c, user_id, address_id);
+        if (!name) {
             return c.text(msgs.AddressNotBindedMsg, 400)
         }
-        // generate jwt
-        const name = await c.env.DB.prepare(
-            `SELECT name FROM address WHERE id = ? `
-        ).bind(address_id).first("name");
         const jwt = await Jwt.sign({
             address: name,
             address_id: address_id
diff --git a/worker/src/user_api/user_send_mail_api.ts b/worker/src/user_api/user_send_mail_api.ts
index abcbed0..d436289 100644
--- a/worker/src/user_api/user_send_mail_api.ts
+++ b/worker/src/user_api/user_send_mail_api.ts
@@ -8,27 +8,18 @@ import {
     requestSendMailAccess,
 } from "../mails_api/send_balance";
 import { getBooleanValue } from "../utils";
-
-const getBindedAddress = async (
-    c: Context<HonoCustomType>
-): Promise<string | null> => {
-    const addressId = Number(c.req.param("address_id"));
-    if (!Number.isInteger(addressId) || addressId <= 0) {
-        return null;
-    }
-    const { user_id } = c.get("userPayload");
-    const address = await c.env.DB.prepare(
-        `SELECT a.name FROM users_address ua`
-        + ` JOIN address a ON a.id = ua.address_id`
-        + ` WHERE ua.user_id = ? AND a.id = ?`
-    ).bind(user_id, addressId).first<string>("name");
-    return address ?? null;
-}
+import { getBindedAddressById } from "./bind_address";
 
 const getAddressOrError = async (
     c: Context<HonoCustomType>
 ): Promise<string | Response> => {
-    const address = await getBindedAddress(c);
+    const addressId = Number(c.req.param("address_id"));
+    if (!Number.isInteger(addressId) || addressId <= 0) {
+        const msgs = i18n.getMessagesbyContext(c);
+        return c.text(msgs.AddressNotBindedMsg, 400);
+    }
+    const { user_id } = c.get("userPayload");
+    const address = await getBindedAddressById(c, user_id, addressId);
     if (address) {
         return address;
     }