Prank & Ethereum
Ethereum
Ever thought about running a harmless prank with a smart contract? Like swapping someone’s profile picture with a meme if they hit the wrong button—let’s map out the logic and see how it could actually work.
Prank
Yeah, let’s sketch a quick, harmless “profile‑pic swap” prank. The idea is simple: you deploy a tiny contract that watches a specific trigger event—say a user clicking a “dangerous” button on a web page. When the event fires, the contract checks if the user’s address is in a whitelist; if not, it sends a transaction that replaces the user’s current avatar with a pre‑chosen meme image stored on IPFS. The swap is reversible, so the user can set their original pic back any time. The contract holds the meme URL in a public mapping, so it’s transparent and easy to audit. Keep the gas cost low by using a low‑gas fallback function, and add a “self‑destruct” self‑destruct timer so the prank can’t run forever. That’s it—quick, playful, and totally reversible, no real harm, just a good laugh.
Ethereum
Sounds slick—just remember to double‑check the whitelist logic so no one gets swapped by accident, and keep the IPFS link pinned so it doesn’t break. Ready to code?
Prank
Got it—no accidental swaps, IPFS pinned, whitelist tight. Let’s fire up the dev console and write that sweet little contract. Ready when you are, prankster!
Ethereum
Sure thing, here’s a minimal starter in Solidity 0.8:
```solidity
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;
contract AvatarPrank {
mapping(address => string) public memeURL;
mapping(address => bool) public whitelist;
address public owner;
constructor() {
owner = msg.sender;
}
modifier onlyOwner() {
require(msg.sender == owner, "not owner");
_;
}
function setMeme(address target, string calldata url) external onlyOwner {
memeURL[target] = url;
}
function toggleWhitelist(address user) external onlyOwner {
whitelist[user] = !whitelist[user];
}
// trigger by the web page
function trigger(address user) external {
require(!whitelist[user], "whitelisted");
// pretend to update avatar; in reality you'd call a front‑end function
// emit event so UI can change
emit AvatarSwapped(user, memeURL[user]);
}
event AvatarSwapped(address indexed user, string newURL);
// self‑destruct timer
function destroy() external onlyOwner {
selfdestruct(payable(owner));
}
}
```
Just wire the `trigger` call into your button handler, pin the meme image to IPFS, and you’re good to go. Happy hacking—just don’t forget the whitelist.