add bank backend code

backend/Models/accountModel.js

@@ -0,0 +1,16 @@
+const { mongoose } = require("mongoose");
+
+const accountSchema = new mongoose.Schema({
+  userId: {
+    type: mongoose.Schema.Types.ObjectId, 
+    ref: "User",
+    required: true,
+  },
+  balance: {
+    type: Number,
+    required: true,
+  },
+});
+
+const Account = mongoose.model("Account", accountSchema);
+module.exports = Account;

backend/Routes/accountRoutes.js

@@ -0,0 +1,53 @@
+const express = require("express");
+const router = express.Router();
+const Account = require("../Models/accountModel");
+const authMiddleware = require("../Middleware/authMiddleware");
+router.get("/balance", authMiddleware, async (req, res) => {
+  try {
+    const account = await Account.findOne({ userId: req.userId });
+
+    if (!account) {
+      return res.status(404).json({ message: "Account not found" });
+    }
+
+    res.json({ balance: account.balance });
+  } catch (error) {
+    console.error("Error fetching account balance:", error);
+    res.status(500).json({ message: "Internal server error" });
+  }
+});
+
+router.post("/transfer", authMiddleware, async (req, res) => {
+
+  const { amount, to } = req.body;
+
+  const account = await Account.findOne({ userId: req.userId })
+
+  if (!account || account.balance < amount) { 
+    return res.status(400).json({
+      message: "Insufficient balance",
+    });
+  }
+
+  const toAccount = await Account.findOne({ userId: to })
+  if (!toAccount) {
+    return res.status(400).json({
+      message: "Invalid account",
+    });
+  }
+
+  await Account.updateOne(
+    { userId: req.userId },
+    { $inc: { balance: -amount } }
+  )
+  await Account.updateOne(
+    { userId: to },
+    { $inc: { balance: amount } }
+  )
+
+
+  res.json({
+    message: "Transfer successful",
+  });
+});
+module.exports = router;

backend/Routes/authRoutes.js

@@ -1,10 +1,12 @@
 const express = require("express");
 const User = require("../Models/User");
+const Account = require("../Models/accountModel");
 const router = express.Router();
 const { JWT_SECRET, JWT_EXPIRY } = require("../Config/config");
 const jwt = require("jsonwebtoken");
 const authMiddleware = require("../Middleware/authMiddleware");
 const zod = require("zod");
+
 router.post("/signup", async (req, res, next) => {
   try {
     const { username, password, firstName, lastName } = req.body;
@@ -15,6 +17,13 @@ router.post("/signup", async (req, res, next) => {
     }
     const user = new User({ username, password, firstName, lastName });
     await user.save();
+
+    const userId = user._id;
+    await Account.create({
+      userId,
+      balance: 1 + Math.random() * 10000,
+    });
+
     const token = jwt.sign({ id: user._id }, JWT_SECRET, {
       expiresIn: JWT_EXPIRY,
       algorithm: "HS256",
@@ -85,30 +94,28 @@ router.put("/update", authMiddleware, async (req, res) => {
   }
 });
 
-//filter user based on name 
-router.get('/bulk', async (req,res)=>{
-const filter=req.query.filter||""
-const users=await User.find({
-  $or:[
-    {
-      firstName:{'$regex':filter}
-    },
-    {
-      lastName:{'$regex':filter}
-    }
-  ]
-})
+//filter user based on name
+router.get("/bulk", async (req, res) => {
+  const filter = req.query.filter || "";
+  const users = await User.find({
+    $or: [
+      {
+        firstName: { $regex: filter },
+      },
+      {
+        lastName: { $regex: filter },
+      },
+    ],
+  });
 
-res.json({
-  user: users.map(user => ({
+  res.json({
+    user: users.map((user) => ({
       username: user.username,
       firstName: user.firstName,
       lastName: user.lastName,
-      _id: user._id
-  }))
-})
-})
-
-
+      _id: user._id,
+    })),
+  });
+});
 
 module.exports = router;

backend/Routes/index.js

@@ -1,6 +1,10 @@
 const express = require("express");
 const router = express.Router();
 const authRoutes = require("./authRoutes");
+const accountRoutes = require("./accountRoutes");
+const authMiddleware = require("../Middleware/authMiddleware");
 
 router.use("/user", authRoutes);
+router.use("/account", accountRoutes);
+
 module.exports = router;

backend/index.js

@@ -5,9 +5,6 @@ const cors = require("cors");
 const mainroute=require("./Routes/index")
 const app = express();
 config();
-app.get("/", (req, res) => {
-  res.send("heiii");
-});
 
 connectDB();