
๐ผWhat smart contracts does Chaos racer use?
Driving Innovation with Smart Contracts in Chaos Racer
/**
*Submitted for verification at polygonscan.com on 2023-09-22
*/
pragma solidity ^0.4.21;
contract simpleToken {
uint256 totalSupply_;
string public constant name = "Chaos Racer";
string public constant symbol = "CHRA";
uint8 public constant decimals = 18;
uint256 public constant initialSupply =1000000*(10**uint256(decimals));
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
mapping (address => uint256) balances;
mapping (address => mapping (address => uint256)) allowed;
function totalSupply() public view returns (uint256){
return totalSupply_;
}
function balanceOf(address _owner) public view returns (uint256){
return balances[_owner];
}
function allowance(address _owner, address _spender) public view returns (uint256) {
return allowed[_owner][_spender];
}
function transfer(address _to, uint256 _value) public returns (bool ) {
require(_to != address(0));
require(balances[msg.sender] >= _value);
balances[msg.sender] = balances[msg.sender] - _value;
balances[_to] = balances[_to] + _value;
emit Transfer(msg.sender, _to, _value);
return true;
}
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
balances[_from] = balances[_from] - _value;
balances[_to] = balances[_to] + _value;
allowed[_from][msg.sender] = allowed[_from][msg.sender] - _value;
emit Transfer(_from, _to, _value);
return true;
}
function increaseApproval(address _spender, uint _addedValue) public returns (bool) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender] + _addedValue;
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) {
uint oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
}
else {
allowed[msg.sender][_spender] = oldValue - _subtractedValue;
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
function simpleToken() public {
totalSupply_ = initialSupply;
balances[msg.sender] = initialSupply;
emit Transfer(0x0, msg.sender, initialSupply);
}
}Last updated