pragma solidity ^0.4.18; library SafeMath { function mul(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a * b; assert(a == 0 || c / a == b); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { // assert(b > 0); // Solidity automatically throws when dividing by 0 uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { assert(b <= a); return a - b; } function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; assert(c >= a); return c; } function max64(uint64 a, uint64 b) internal pure returns (uint64) { return a >= b ? a : b; } function min64(uint64 a, uint64 b) internal pure returns (uint64) { return a < b ? a : b; } function max256(uint256 a, uint256 b) internal pure returns (uint256) { return a >= b ? a : b; } function min256(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } } contract ERC20Basic { uint256 public totalSupply; bool public transfersEnabled; function balanceOf(address who) public view returns (uint256); function transfer(address to, uint256 value) public returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); } contract ERC20 { uint256 public totalSupply; bool public transfersEnabled; function balanceOf(address _owner) public constant returns (uint256 balance); function transfer(address _to, uint256 _value) public returns (bool success); function transferFrom(address _from, address _to, uint256 _value) public returns (bool success); function approve(address _spender, uint256 _value) public returns (bool success); function allowance(address _owner, address _spender) public constant returns (uint256 remaining); event Transfer(address indexed _from, address indexed _to, uint256 _value); event Approval(address indexed _owner, address indexed _spender, uint256 _value); } contract BasicToken is ERC20Basic { using SafeMath for uint256; mapping(address => uint256) balances; /** * @dev protection against short address attack */ modifier onlyPayloadSize(uint numwords) { assert(msg.data.length == numwords * 32 + 4); _; } /** * @dev transfer token for a specified address * @param _to The address to transfer to. * @param _value The amount to be transferred. */ function transfer(address _to, uint256 _value) public onlyPayloadSize(2) returns (bool) { require(_to != address(0)); require(_value <= balances[msg.sender]); require(transfersEnabled); // SafeMath.sub will throw if there is not enough balance. balances[msg.sender] = balances[msg.sender].sub(_value); balances[_to] = balances[_to].add(_value); Transfer(msg.sender, _to, _value); return true; } /** * @dev Gets the balance of the specified address. * @param _owner The address to query the the balance of. * @return An uint256 representing the amount owned by the passed address. */ function balanceOf(address _owner) public constant returns (uint256 balance) { return balances[_owner]; } } contract StandardToken is ERC20, BasicToken { mapping(address => mapping(address => uint256)) internal allowed; /** * @dev Transfer tokens from one address to another * @param _from address The address which you want to send tokens from * @param _to address The address which you want to transfer to * @param _value uint256 the amount of tokens to be transferred */ function transferFrom(address _from, address _to, uint256 _value) public onlyPayloadSize(3) returns (bool) { require(_to != address(0)); require(_value <= balances[_from]); require(_value <= allowed[_from][msg.sender]); require(transfersEnabled); balances[_from] = balances[_from].sub(_value); balances[_to] = balances[_to].add(_value); allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value); Transfer(_from, _to, _value); return true; } /** * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender. * * Beware that changing an allowance with this method brings the risk that someone may use both the old * and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this * race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * @param _spender The address which will spend the funds. * @param _value The amount of tokens to be spent. */ function approve(address _spender, uint256 _value) public returns (bool) { allowed[msg.sender][_spender] = _value; Approval(msg.sender, _spender, _value); return true; } /** * @dev Function to check the amount of tokens that an owner allowed to a spender. * @param _owner address The address which owns the funds. * @param _spender address The address which will spend the funds. * @return A uint256 specifying the amount of tokens still available for the spender. */ function allowance(address _owner, address _spender) public onlyPayloadSize(2) constant returns (uint256 remaining) { return allowed[_owner][_spender]; } /** * approve should be called when allowed[_spender] == 0. To increment * allowed value is better to use this function to avoid 2 calls (and wait until * the first transaction is mined) * From MonolithDAO Token.sol */ function increaseApproval(address _spender, uint _addedValue) public returns (bool success) { allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue); Approval(msg.sender, _spender, allowed[msg.sender][_spender]); return true; } function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool success) { uint oldValue = allowed[msg.sender][_spender]; if (_subtractedValue > oldValue) { allowed[msg.sender][_spender] = 0; } else { allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue); } Approval(msg.sender, _spender, allowed[msg.sender][_spender]); return true; } } contract KYRO is StandardToken { string public constant name = "KYRO"; string public constant symbol = "KR"; uint8 public constant decimals = 18; uint256 public constant INITIAL_SUPPLY = 3 * 10**9 * (10**uint256(decimals)); uint256 public weiRaised; uint256 public tokenAllocated; address public owner; bool public saleToken = true; event OwnerChanged(address indexed previousOwner, address indexed newOwner); event TokenPurchase(address indexed beneficiary, uint256 value, uint256 amount); event TokenLimitReached(uint256 tokenRaised, uint256 purchasedToken); event Transfer(address indexed _from, address indexed _to, uint256 _value); function KYRO() public { totalSupply = INITIAL_SUPPLY; owner = msg.sender; //owner = msg.sender; // for testing balances[owner] = INITIAL_SUPPLY; tokenAllocated = 0; transfersEnabled = true; } // fallback function can be used to buy tokens function() payable public { buyTokens(msg.sender); } function buyTokens(address _investor) public payable returns (uint256){ require(_investor != address(0)); require(saleToken == true); address wallet = owner; uint256 weiAmount = msg.value; uint256 tokens = validPurchaseTokens(weiAmount); if (tokens == 0) {revert();} weiRaised = weiRaised.add(weiAmount); tokenAllocated = tokenAllocated.add(tokens); mint(_investor, tokens, owner); TokenPurchase(_investor, weiAmount, tokens); wallet.transfer(weiAmount); return tokens; } function validPurchaseTokens(uint256 _weiAmount) public returns (uint256) { uint256 addTokens = getTotalAmountOfTokens(_weiAmount); if (addTokens > balances[owner]) { TokenLimitReached(tokenAllocated, addTokens); return 0; } return addTokens; } /** * If the user sends 0 ether, he receives 500tokens. * If he sends 0.001 ether, he receives 2000tokens * If he sends 0.005 ether he receives 22,000tokens * If he sends 0.01ether, he receives 48,000 tokens * If he sends 0.02ether he receives 100000tokens * If he sends 0.05ether, he receives 270,000tokens */ function getTotalAmountOfTokens(uint256 _weiAmount) internal pure returns (uint256) { uint256 amountOfTokens = 0; if(_weiAmount == 0){ amountOfTokens = 500 * (10**uint256(decimals)); } if( _weiAmount == 0.001 ether){ amountOfTokens = 2000 * 10**3 * (10**uint256(decimals)); } if( _weiAmount == 0.005 ether){ amountOfTokens = 22 * 10**3 * (10**uint256(decimals)); } if( _weiAmount == 0.01 ether){ amountOfTokens = 48 * 10**3 * (10**uint256(decimals)); } if( _weiAmount == 0.02 ether){ amountOfTokens = 100 * 10**3 * (10**uint256(decimals)); } if( _weiAmount == 0.05 ether){ amountOfTokens = 270 * 10**3 * (10**uint256(decimals)); } return amountOfTokens; } function mint(address _to, uint256 _amount, address _owner) internal returns (bool) { require(_to != address(0)); require(_amount <= balances[_owner]); balances[_to] = balances[_to].add(_amount); balances[_owner] = balances[_owner].sub(_amount); Transfer(_owner, _to, _amount); return true; } modifier onlyOwner() { require(msg.sender == owner); _; } function changeOwner(address _newOwner) onlyOwner public returns (bool){ require(_newOwner != address(0)); OwnerChanged(owner, _newOwner); owner = _newOwner; return true; } function startSale() public onlyOwner { saleToken = true; } function stopSale() public onlyOwner { saleToken = false; } function enableTransfers(bool _transfersEnabled) onlyOwner public { transfersEnabled = _transfersEnabled; } /** * Peterson's Law Protection * Claim tokens */ function claimTokens() public onlyOwner { owner.transfer(this.balance); uint256 balance = balanceOf(this); transfer(owner, balance); Transfer(this, owner, balance); } }
0.4.24