diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -1,3 +1,4 @@
+[![Review Assignment Due Date](https://classroom.github.com/assets/deadline-readme-button-22041afd0340ce965d47ae6ef1cefeee28c7c493a6346c4f15d667ab976d596c.svg)](https://classroom.github.com/a/W3nV4mdD)
 # Banking management
 
 ## Overview
diff --git a/src/models/bank-account.ts b/src/models/bank-account.ts
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+++ b/src/models/bank-account.ts
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+export default class BankAccount{
+    
+}
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diff --git a/src/models/bank.ts b/src/models/bank.ts
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+++ b/src/models/bank.ts
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+let globalBankId=0; 
+import {  BankOptions } from "@/types/Common";
+
+export default class Bank {
+  private bankId:string  
+  private accounts:string[]   
+  private isNegativeAlloed:boolean  
+  
+  constructor(bankId:string,options?:BankOptions){ 
+    this.bankId=bankId
+    this.isNegativeAlloed=options?.isNegativeAllowed ?? false; 
+    this.accounts=[];
+  }
+
+ public  static create(options?:BankOptions){ 
+    return new Bank((globalBankId++)+ "" ,options);
+  } 
+  public createAccount(val:number){ 
+  return this;
+  }  
+
+  public getId(){
+   return this.bankId;
+  }
+}
diff --git a/src/models/user.ts b/src/models/user.ts
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+++ b/src/models/user.ts
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+export default class User {
+  userName: string;
+  bankaAcs: string[];
+  userId: string;
+
+  constructor(name: string, bankAcs: string[]) {
+    this.userName = name;
+    this.bankaAcs = bankAcs;
+  }
+
+  static create(name: string, bandAcs: string[]) {
+    return new User(name, bandAcs);
+  }
+
+  getId() {
+    return this.userId;
+  }
+}
diff --git a/src/services/GlobalRegistry.ts b/src/services/GlobalRegistry.ts
new file mode 100644
index 0000000..a7499f4
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+++ b/src/services/GlobalRegistry.ts
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+export default class GlobalRegistry{
+   static clear(){}
+}
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diff --git a/src/services/TransactionService.ts b/src/services/TransactionService.ts
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index 0000000..aa3a48c
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+++ b/src/services/TransactionService.ts
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+export default class TransactionService{
+    
+}
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diff --git a/src/types/Common.ts b/src/types/Common.ts
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+++ b/src/types/Common.ts
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+import Bank from "@/models/bank";
+import BankAccount from "@/models/bank-account";
+import User from "@/models/user";
+
+export type BankOptions = {
+  isNegativeAllowed?: boolean;
+};  
+export type BankAccountId = string;
+export type UserId = string;
+export type BankId = string;
+export type UserAccountsDeatails = Record<string, string[]>;
+export type UserDeatails = Record<string, User>;
+export type BanksDeatails = Record<string, Bank>;
+export type BankAccountsDeatails = Record<string, BankAccount>;