Contract Source Code:
File 1 of 1 : HadeCoin
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;
}
}
contract ERC20 {
uint256 public totalSupply;
function balanceOf(address who) external view returns (uint256);
function transfer(address to, uint256 value) external;
function allowance(address owner, address spender) external view returns (uint256);
function transferFrom(address from, address to, uint256 value) external;
function approve(address spender, uint256 value) external;
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
contract BasicToken is ERC20 {
using SafeMath for uint256;
mapping(address => uint256) balances;
mapping (address => mapping (address => uint256)) allowed;
/**
* @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) external {
address _from = msg.sender;
require (balances[_from] >= _value && balances[_to] + _value > balances[_to]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
Transfer(_from, _to, _value);
}
/**
* @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 amout of tokens to be transfered
*/
function transferFrom(address _from, address _to, uint256 _value) external {
if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && balances[_to] + _value > balances[_to]){
uint256 _allowance = allowed[_from][msg.sender];
allowed[_from][msg.sender] = _allowance.sub(_value);
balances[_to] = balances[_to].add(_value);
balances[_from] = balances[_from].sub(_value);
Transfer(_from, _to, _value);
}
}
function balanceOf(address _owner) external view returns (uint256 balance) {
balance = balances[_owner];
}
function approve(address _spender, uint256 _value) external {
// To change the approve amount you first have to reduce the addresses`
// allowance to zero by calling `approve(_spender, 0)` if it is not
// already 0 to mitigate the race condition described here:
// https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
require((_value == 0) || (allowed[msg.sender][_spender] == 0));
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
}
/**
* @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 specifing the amount of tokens still avaible for the spender.
*/
function allowance(address _owner, address _spender) external view returns (uint256 remaining) {
remaining = allowed[_owner][_spender];
}
}
contract HadeCoin is BasicToken {
using SafeMath for uint256;
/*
STORAGE
*/
// name of the token
string public name = "HADE Platform";
// symbol of token
string public symbol = "HADE";
// decimals
uint8 public decimals = 18;
// total supply of Hade Coin
uint256 public totalSupply = 150000000 * 10**18;
// multi sign address of founders which hold
address public adminMultiSig;
/*
EVENTS
*/
event ChangeAdminWalletAddress(uint256 _blockTimeStamp, address indexed _foundersWalletAddress);
/*
CONSTRUCTOR
*/
function HadeCoin(address _adminMultiSig) public {
adminMultiSig = _adminMultiSig;
balances[adminMultiSig] = totalSupply;
}
/*
MODIFIERS
*/
modifier nonZeroAddress(address _to) {
require(_to != 0x0);
_;
}
modifier onlyAdmin() {
require(msg.sender == adminMultiSig);
_;
}
/*
OWNER FUNCTIONS
*/
// @title mint sends new coin to the specificed recepiant
// @param _to is the recepiant the new coins
// @param _value is the number of coins to mint
function mint(address _to, uint256 _value) external onlyAdmin {
require(_to != address(0));
require(_value > 0);
totalSupply += _value;
balances[_to] += _value;
Transfer(address(0), _to, _value);
}
// @title burn allows the administrator to burn their own tokens
// @param _value is the number of tokens to burn
// @dev note that admin can only burn their own tokens
function burn(uint256 _value) external onlyAdmin {
require(_value > 0 && balances[msg.sender] >= _value);
totalSupply -= _value;
balances[msg.sender] -= _value;
}
// @title changeAdminAddress allows to update the owner wallet
// @param _newAddress is the address of the new admin wallet
// @dev only callable by current owner
function changeAdminAddress(address _newAddress)
external
onlyAdmin
nonZeroAddress(_newAddress)
{
adminMultiSig = _newAddress;
ChangeAdminWalletAddress(now, adminMultiSig);
}
// @title fallback reverts if a method call does not match
// @dev reverts if any money is sent
function() public {
revert();
}
}