Contract Name:
TokenDeskToken
Contract Source Code:
File 1 of 1 : TokenDeskToken
pragma solidity 0.4.18;
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
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;
require(c >= a);
return c;
}
}
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/179
*/
contract ERC20Basic {
uint256 public totalSupply;
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 Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) public balances;
/**
* @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 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);
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 view returns (uint256 balance) {
return balances[_owner];
}
}
/**
* @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 SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure.
* To use this library you can add a `using SafeERC20 for ERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
function safeTransfer(ERC20Basic token, address to, uint256 value) internal {
assert(token.transfer(to, value));
}
function safeTransferFrom(ERC20 token, address from, address to, uint256 value) internal {
assert(token.transferFrom(from, to, value));
}
function safeApprove(ERC20 token, address spender, uint256 value) internal {
assert(token.approve(spender, value));
}
}
/**
* @title TokenTimelock
* @dev TokenTimelock is a token holder contract that will allow a
* beneficiary to extract the tokens after a given release time
*/
contract TokenTimelock {
using SafeERC20 for ERC20Basic;
// ERC20 basic token contract being held
ERC20Basic public token;
// beneficiary of tokens after they are released
address public beneficiary;
// timestamp when token release is enabled
uint64 public releaseTime;
function TokenTimelock(ERC20Basic _token, address _beneficiary, uint64 _releaseTime) public {
require(_releaseTime > uint64(block.timestamp));
token = _token;
beneficiary = _beneficiary;
releaseTime = _releaseTime;
}
/**
* @notice Transfers tokens held by timelock to beneficiary.
*/
function release() public {
require(uint64(block.timestamp) >= releaseTime);
uint256 amount = token.balanceOf(this);
require(amount > 0);
token.safeTransfer(beneficiary, amount);
}
}
/**
* @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);
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 view 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 Owned {
address public owner;
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
}
/// TokenDesk token contract ///
contract TokenDeskToken is StandardToken, Owned {
string public constant name = "TokenDesk";
string public constant symbol = "TDS";
uint256 public constant decimals = 18;
/// Maximum tokens to be allocated.
uint256 public constant TOKENS_HARD_CAP = 20000000 * 10**decimals;
/// Maximum tokens to be allocated on the sale (70% of the hard cap)
uint256 public constant TOKENS_SALE_HARD_CAP = 14000000 * 10**decimals;
bool public tokenSaleClosed = false;
// contract to be called to release the TD team tokens
address public timelockContractAddress;
// seconds since 01.01.1970 to 24.12.2017 (both 00:00:00 o'clock UTC)
uint64 private date24Dec2017 = 1514073600;
// seconds since 01.01.1970 to 01.01.2019 (both 00:00:00 o'clock UTC)
uint64 private date01Jan2019 = 1546300800;
modifier inProgress {
require(totalSupply < TOKENS_SALE_HARD_CAP && !tokenSaleClosed);
_;
}
modifier beforeEnd {
require(!tokenSaleClosed);
_;
}
/// Either sale closed or 24 Dec 2017 passed
modifier tradingOpen {
require(tokenSaleClosed || (uint64(block.timestamp) > date24Dec2017));
_;
}
function issueTokensMulti(address[] _addresses, uint256[] _tokensInteger) public onlyOwner inProgress {
require(_addresses.length == _tokensInteger.length);
require(_addresses.length <= 100);
for (uint256 i = 0; i < _tokensInteger.length; i = i.add(1)) {
issueTokens(_addresses[i], _tokensInteger[i]);
}
}
function issueTokens(address _investor, uint256 _tokensInteger) public onlyOwner inProgress {
require(_investor != address(0));
uint256 tokens = _tokensInteger.mul(10**decimals);
// compute without actually increasing it
uint256 increasedTotalSupply = totalSupply.add(tokens);
// roll back if hard cap reached
require(increasedTotalSupply <= TOKENS_SALE_HARD_CAP);
//increase token total supply
totalSupply = increasedTotalSupply;
//update the investors balance to number of tokens sent
balances[_investor] = balances[_investor].add(tokens);
}
function close() public onlyOwner beforeEnd {
// final supply = investors tokens + team tokens
// team tokens = 30% final supply = 30/100 * final supply
// investors tokens = totalSupply = 70% final supply = 70/100 * final supply
// final supply = 100/70 * totalSupply
// team tokens = 30/70 * totalSupply = totalSupply * (3/7)
uint256 teamTokens = totalSupply.mul(3).div(7);
// check for rounding errors when cap is reached
if(totalSupply.add(teamTokens) > TOKENS_HARD_CAP) {
teamTokens = TOKENS_HARD_CAP.sub(totalSupply);
}
/// lock until 01 Jan 2019
TokenTimelock lockedTeamTokens = new TokenTimelock(this, owner, date01Jan2019);
timelockContractAddress = address(lockedTeamTokens);
balances[timelockContractAddress] = balances[timelockContractAddress].add(teamTokens);
/// increase token total supply
totalSupply = totalSupply.add(teamTokens);
tokenSaleClosed = true;
}
/// Transfer limited by the tradingOpen modifier (either sale closed or 24 Dec 2017 passed)
function transferFrom(address _from, address _to, uint256 _value) public tradingOpen returns (bool) {
return super.transferFrom(_from, _to, _value);
}
/// Transfer limited by the tradingOpen modifier (either sale closed or 24 Dec 2017 passed)
function transfer(address _to, uint256 _value) public tradingOpen returns (bool) {
return super.transfer(_to, _value);
}
}