Name : Mirza Mohammed Junaid
Roll No : 9459
Branch : AI&DS
Assignment 4
1. Q. Develop a smart contract with critical functions that should be paused in
certain scenarios (e.g., emergency). Implement a modifier to pause these
functions when needed.
Code :
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
contract MyContract {
address public owner;
bool public paused;
uint256 public criticalData;
modifier onlyOwner() {
require(msg.sender == owner, "Only contract owner can call this function.");
_;
}
modifier whenNotPaused() {
require(!paused, "Contract is paused.");
_;
}
constructor() {
owner = msg.sender;
paused = false;
}
function pauseContract() public onlyOwner {
paused = true;
}
function unpauseContract() public onlyOwner {
paused = false;
}
function criticalFunction(uint256 newValue) public whenNotPaused onlyOwner {
criticalData = newValue;
}
}
