Contract Source Code:
File 1 of 1 : ETToken
pragma solidity ^0.4.21;
// SafeMath is a part of Zeppelin Solidity library
// licensed under MIT License
// https://github.com/OpenZeppelin/zeppelin-solidity/blob/master/LICENSE
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(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;
}
}
// https://github.com/OpenZeppelin/zeppelin-solidity
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/179
*/
contract ERC20Basic {
function totalSupply() public view returns (uint256);
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);
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) public view returns (uint256);
function transferFrom(address from, address to, uint256 value) public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) balances;
uint256 totalSupply_;
/**
* @dev Protection from short address attack
*/
modifier onlyPayloadSize(uint size) {
assert(msg.data.length == size + 4);
_;
}
/**
* @dev total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @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) onlyPayloadSize(2 * 32) public returns (bool) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
// SafeMath.sub will throw if there is not enough balance.
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
_postTransferHook(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 view returns (uint256 balance) {
return balances[_owner];
}
/**
* @dev Hook for custom actions to be executed after transfer has completed
* @param _from Transferred from
* @param _to Transferred to
* @param _value Value transferred
*/
function _postTransferHook(address _from, address _to, uint256 _value) internal;
}
/**
* @title Standard ERC20 token
*
* @dev Implementation of the basic standard token.
* @dev https://github.com/ethereum/EIPs/issues/20
* @dev Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
*/
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 returns (bool) {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
_postTransferHook(_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;
emit 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 view returns (uint256) {
return allowed[_owner][_spender];
}
/**
* @dev Increase the amount of tokens that an owner allowed to a 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
* @param _spender The address which will spend the funds.
* @param _addedValue The amount of tokens to increase the allowance by.
*/
function increaseApproval(address _spender, uint _addedValue) public returns (bool) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
/**
* @dev Decrease the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To decrement
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _subtractedValue The amount of tokens to decrease the allowance by.
*/
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.sub(_subtractedValue);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}
contract Owned {
address owner;
modifier onlyOwner {
require(msg.sender == owner);
_;
}
/// @dev Contract constructor
function Owned() public {
owner = msg.sender;
}
}
contract AcceptsTokens {
ETToken public tokenContract;
function AcceptsTokens(address _tokenContract) public {
tokenContract = ETToken(_tokenContract);
}
modifier onlyTokenContract {
require(msg.sender == address(tokenContract));
_;
}
function acceptTokens(address _from, uint256 _value, uint256 param1, uint256 param2, uint256 param3) external;
}
contract ETToken is Owned, StandardToken {
using SafeMath for uint;
string public name = "ETH.TOWN Token";
string public symbol = "ETIT";
uint8 public decimals = 18;
address public beneficiary;
address public oracle;
address public heroContract;
modifier onlyOracle {
require(msg.sender == oracle);
_;
}
mapping (uint32 => address) public floorContracts;
mapping (address => bool) public canAcceptTokens;
mapping (address => bool) public isMinter;
modifier onlyMinters {
require(msg.sender == owner || isMinter[msg.sender]);
_;
}
event Dividend(uint256 value);
event Withdrawal(address indexed to, uint256 value);
event Burn(address indexed from, uint256 value);
function ETToken() public {
oracle = owner;
beneficiary = owner;
totalSupply_ = 0;
}
function setOracle(address _oracle) external onlyOwner {
oracle = _oracle;
}
function setBeneficiary(address _beneficiary) external onlyOwner {
beneficiary = _beneficiary;
}
function setHeroContract(address _heroContract) external onlyOwner {
heroContract = _heroContract;
}
function _mintTokens(address _user, uint256 _amount) private {
require(_user != 0x0);
balances[_user] = balances[_user].add(_amount);
totalSupply_ = totalSupply_.add(_amount);
emit Transfer(address(this), _user, _amount);
}
function authorizeFloor(uint32 _index, address _floorContract) external onlyOwner {
floorContracts[_index] = _floorContract;
}
function _acceptDividends(uint256 _value) internal {
uint256 beneficiaryShare = _value / 5;
uint256 poolShare = _value.sub(beneficiaryShare);
beneficiary.transfer(beneficiaryShare);
emit Dividend(poolShare);
}
function acceptDividends(uint256 _value, uint32 _floorIndex) external {
require(floorContracts[_floorIndex] == msg.sender);
_acceptDividends(_value);
}
function rewardTokensFloor(address _user, uint256 _tokens, uint32 _floorIndex) external {
require(floorContracts[_floorIndex] == msg.sender);
_mintTokens(_user, _tokens);
}
function rewardTokens(address _user, uint256 _tokens) external onlyMinters {
_mintTokens(_user, _tokens);
}
function() payable public {
// Intentionally left empty, for use by floors
}
function payoutDividends(address _user, uint256 _value) external onlyOracle {
_user.transfer(_value);
emit Withdrawal(_user, _value);
}
function accountAuth(uint256 /*_challenge*/) external {
// Does nothing by design
}
function burn(uint256 _amount) external {
require(balances[msg.sender] >= _amount);
balances[msg.sender] = balances[msg.sender].sub(_amount);
totalSupply_ = totalSupply_.sub(_amount);
emit Burn(msg.sender, _amount);
}
function setCanAcceptTokens(address _address, bool _value) external onlyOwner {
canAcceptTokens[_address] = _value;
}
function setIsMinter(address _address, bool _value) external onlyOwner {
isMinter[_address] = _value;
}
function _invokeTokenRecipient(address _from, address _to, uint256 _value, uint256 _param1, uint256 _param2, uint256 _param3) internal {
if (!canAcceptTokens[_to]) {
return;
}
AcceptsTokens recipient = AcceptsTokens(_to);
recipient.acceptTokens(_from, _value, _param1, _param2, _param3);
}
/**
* @dev transfer token for a specified address and forward the parameters to token recipient if any
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
* @param _param1 Parameter 1 for the token recipient
* @param _param2 Parameter 2 for the token recipient
* @param _param3 Parameter 3 for the token recipient
*/
function transferWithParams(address _to, uint256 _value, uint256 _param1, uint256 _param2, uint256 _param3) onlyPayloadSize(5 * 32) external returns (bool) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
// SafeMath.sub will throw if there is not enough balance.
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
_invokeTokenRecipient(msg.sender, _to, _value, _param1, _param2, _param3);
return true;
}
/**
* @dev Hook for custom actions to be executed after transfer has completed
* @param _from Transferred from
* @param _to Transferred to
* @param _value Value transferred
*/
function _postTransferHook(address _from, address _to, uint256 _value) internal {
_invokeTokenRecipient(_from, _to, _value, 0, 0, 0);
}
}