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Created using remix-ide: Realtime Ethereum Contract Compiler and Runtime. Load this file by pasting this gists URL or ID at
pragma solidity ^0.8.4;
contract EventExample {
mapping(address => uint) public tokenBalance;
event TokensSent(address _from, address _to, uint _amount);
constructor() {
tokenBalance[msg.sender] = 100;
function sendToken(address _to, uint _amount) public returns(bool) {
require(tokenBalance[msg.sender] >= _amount, "Not enough tokens");
assert(tokenBalance[_to] + _amount >= tokenBalance[_to]);
assert(tokenBalance[msg.sender] - _amount <= tokenBalance[msg.sender]);
tokenBalance[msg.sender] -= _amount;
tokenBalance[_to] += _amount;
emit TokensSent(msg.sender, _to, _amount);
return true;
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