Name : Mirza Mohammed Junaid
Roll No : 9459
Branch : AI&DS
Assignment 3
Q. Role-Based Access Control (RBAC): Design a smart contract with multiple user roles (e.g.,
admin, manager, user ). Implement modifiers for each role to enforce access control,
allowing specific functions to be executed only by users with the appropriate role.
Code :
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
contract RBAC {
address public admin;
mapping(address => bool) public managers;
mapping(address => bool) public users;
modifier onlyAdmin() {
require(msg.sender == admin, "Only admin can execute this function.");
_;
}
modifier onlyManager() {
require(managers[msg.sender], "Only manager can execute this function.");
_;
}
modifier onlyUser() {
require(users[msg.sender], "Only user can execute this function.");
_;
}
constructor() {
admin = msg.sender;
}
function addManager(address _manager) public onlyAdmin {
managers[_manager] = true;
}
function removeManager(address _manager) public onlyAdmin {
managers[_manager] = false;
}
