(original) (raw)

// SPDX-License-Identifier: AGPL-3.0 pragma solidity ^0.5.0; contract Token { mapping(address => uint256) public balances; constructor() public { balances[msg.sender] = 100; } function transfer(address to, uint256 val) public { // check for overflow if (balances[msg.sender] >= balances[to]) { balances[msg.sender] -= val; balances[to] += val; } } }