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February 24, 2018 12:19
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pragma solidity ^0.4.13; | |
library SafeMath { | |
function mul(uint256 a, uint256 b) internal constant returns (uint256) { | |
uint256 c = a * b; | |
assert(a == 0 || c / a == b); | |
return c; | |
} | |
function div(uint256 a, uint256 b) internal constant 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 constant returns (uint256) { | |
assert(b <= a); | |
return a - b; | |
} | |
function add(uint256 a, uint256 b) internal constant returns (uint256) { | |
uint256 c = a + b; | |
assert(c >= a); | |
return c; | |
} | |
} | |
contract ERC20Basic { | |
uint256 public totalSupply; | |
function balanceOf(address who) public constant returns (uint256); | |
function transfer(address to, uint256 value) public returns (bool); | |
event Transfer(address indexed from, address indexed to, uint256 value); | |
} | |
contract ERC20 is ERC20Basic { | |
function allowance(address owner, address spender) public constant 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); | |
} | |
contract Ownable { | |
address public owner; | |
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); | |
/** | |
* @dev The Ownable constructor sets the original `owner` of the contract to the sender | |
* account. | |
*/ | |
function Ownable() { | |
owner = msg.sender; | |
} | |
/** | |
* @dev Throws if called by any account other than the owner. | |
*/ | |
modifier onlyOwner() { | |
require(msg.sender == owner); | |
_; | |
} | |
/** | |
* @dev Allows the current owner to transfer control of the contract to a newOwner. | |
* @param newOwner The address to transfer ownership to. | |
*/ | |
function transferOwnership(address newOwner) onlyOwner public { | |
require(newOwner != address(0)); | |
OwnershipTransferred(owner, newOwner); | |
owner = newOwner; | |
} | |
} | |
contract BasicToken is ERC20Basic { | |
using SafeMath for uint256; | |
mapping(address => uint256) 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 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 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 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 BurnableToken is StandardToken { | |
event Burn(address indexed burner, uint256 value); | |
/** | |
* @dev Burns a specific amount of tokens. | |
* @param _value The amount of token to be burned. | |
*/ | |
function burn(uint256 _value) public { | |
require(_value > 0); | |
require(_value <= balances[msg.sender]); | |
// no need to require value <= totalSupply, since that would imply the | |
// sender's balance is greater than the totalSupply, which *should* be an assertion failure | |
address burner = msg.sender; | |
balances[burner] = balances[burner].sub(_value); | |
totalSupply = totalSupply.sub(_value); | |
Burn(burner, _value); | |
} | |
} | |
contract MintableToken is StandardToken, Ownable { | |
event Mint(address indexed to, uint256 amount); | |
event MintFinished(); | |
bool public mintingFinished = false; | |
modifier canMint() { | |
require(!mintingFinished); | |
_; | |
} | |
/** | |
* @dev Function to mint tokens | |
* @param _to The address that will receive the minted tokens. | |
* @param _amount The amount of tokens to mint. | |
* @return A boolean that indicates if the operation was successful. | |
*/ | |
function mint(address _to, uint256 _amount) onlyOwner canMint public returns (bool) { | |
totalSupply = totalSupply.add(_amount); | |
balances[_to] = balances[_to].add(_amount); | |
Mint(_to, _amount); | |
Transfer(0x0, _to, _amount); | |
return true; | |
} | |
/** | |
* @dev Function to stop minting new tokens. | |
* @return True if the operation was successful. | |
*/ | |
function finishMinting() onlyOwner public returns (bool) { | |
mintingFinished = true; | |
MintFinished(); | |
return true; | |
} | |
} | |
contract TssToken is MintableToken, BurnableToken { | |
string public constant name = "TssToken"; | |
string public constant symbol = "TSS"; | |
uint256 public constant decimals = 18; | |
function TssToken(address initialAccount, uint256 initialBalance) public { | |
balances[initialAccount] = initialBalance; | |
totalSupply = initialBalance; | |
} | |
} | |
contract Crowdsale { | |
using SafeMath for uint256; | |
// The token being sold | |
MintableToken public token; | |
// start and end timestamps where investments are allowed (both inclusive) | |
uint256 public startTime; | |
uint256 public endTime; | |
// address where funds are collected | |
address public wallet; | |
// how many token units a buyer gets per wei | |
uint256 public rate; | |
// amount of raised money in wei | |
uint256 public weiRaised; | |
/** | |
* event for token purchase logging | |
* @param purchaser who paid for the tokens | |
* @param beneficiary who got the tokens | |
* @param value weis paid for purchase | |
* @param amount amount of tokens purchased | |
*/ | |
event TokenPurchase(address indexed purchaser, address indexed beneficiary, uint256 value, uint256 amount); | |
event Debug(bytes32 text, uint256); | |
function Crowdsale(uint256 _startTime, uint256 _endTime, uint256 _rate, address _wallet) { | |
require(_startTime >= now); | |
require(_endTime >= _startTime); | |
require(_rate > 0); | |
require(_wallet != 0x0); | |
token = createTokenContract(); | |
startTime = _startTime; | |
endTime = _endTime; | |
rate = _rate; | |
wallet = _wallet; | |
} | |
// creates the token to be sold. | |
// override this method to have crowdsale of a specific mintable token. | |
function createTokenContract() internal returns (MintableToken) { | |
return new MintableToken(); | |
} | |
// fallback function can be used to buy tokens | |
function () payable { | |
buyTokens(msg.sender); | |
} | |
// low level token purchase function | |
function buyTokens(address beneficiary) public payable { | |
require(beneficiary != 0x0); | |
require(validPurchase()); | |
uint256 weiAmount = msg.value; | |
// calculate token amount to be created | |
uint256 tokens = weiAmount.mul(rate); | |
// update state | |
weiRaised = weiRaised.add(weiAmount); | |
token.mint(beneficiary, tokens); | |
TokenPurchase(msg.sender, beneficiary, weiAmount, tokens); | |
forwardFunds(); | |
} | |
// send ether to the fund collection wallet | |
// override to create custom fund forwarding mechanisms | |
function forwardFunds() internal { | |
wallet.transfer(msg.value); | |
} | |
// @return true if the transaction can buy tokens | |
function validPurchase() internal constant returns (bool) { | |
bool withinPeriod = now >= startTime && now <= endTime; | |
bool nonZeroPurchase = msg.value != 0; | |
return withinPeriod && nonZeroPurchase; | |
} | |
// @return true if crowdsale event has ended | |
function hasEnded() public constant returns (bool) { | |
return now > endTime; | |
} | |
} | |
contract Pausable is Ownable { | |
event Pause(); | |
event Unpause(); | |
bool public paused = false; | |
/** | |
* @dev Modifier to make a function callable only when the contract is not paused. | |
*/ | |
modifier whenNotPaused() { | |
require(!paused); | |
_; | |
} | |
/** | |
* @dev Modifier to make a function callable only when the contract is paused. | |
*/ | |
modifier whenPaused() { | |
require(paused); | |
_; | |
} | |
/** | |
* @dev called by the owner to pause, triggers stopped state | |
*/ | |
function pause() onlyOwner whenNotPaused public { | |
paused = true; | |
Pause(); | |
} | |
/** | |
* @dev called by the owner to unpause, returns to normal state | |
*/ | |
function unpause() onlyOwner whenPaused public { | |
paused = false; | |
Unpause(); | |
} | |
} | |
contract TssCrowdsale is Crowdsale, Pausable { | |
enum LifecycleStage { | |
DEPLOYMENT, | |
MINTING, | |
PRESALE, | |
CROWDSALE_PHASE_1, | |
CROWDSALE_PHASE_2, | |
CROWDSALE_PHASE_3, | |
POSTSALE | |
} | |
uint256 public CROWDSALE_PHASE_1_START; | |
uint256 public CROWDSALE_PHASE_2_START; | |
uint256 public CROWDSALE_PHASE_3_START; | |
uint256 public POSTSALE_START; | |
address public FOUNDER_WALLET; | |
address public BOUNTY_WALLET; | |
address public FUTURE_WALLET; | |
address public CROWDSALE_WALLET; | |
address public PRESALE_WALLET; | |
address PROCEEDS_WALLET; | |
LifecycleStage public currentStage; | |
function assertValidParameters() internal { | |
require(CROWDSALE_PHASE_1_START > 0); | |
require(CROWDSALE_PHASE_2_START > 0); | |
require(CROWDSALE_PHASE_3_START > 0); | |
require(POSTSALE_START > 0); | |
require(address(FOUNDER_WALLET) != 0); | |
require(address(BOUNTY_WALLET) != 0); | |
require(address(FUTURE_WALLET) != 0); | |
} | |
/** | |
* Used for forcing ensureStage modifier | |
*/ | |
function setCurrentStage() onlyOwner ensureStage returns (bool) { | |
return true; | |
} | |
modifier ensureStage() { | |
if (token.mintingFinished()) { | |
if (now < CROWDSALE_PHASE_1_START) {currentStage = LifecycleStage.PRESALE;} | |
else if (now < CROWDSALE_PHASE_2_START) {currentStage = LifecycleStage.CROWDSALE_PHASE_1;} | |
else if (now < CROWDSALE_PHASE_3_START) {currentStage = LifecycleStage.CROWDSALE_PHASE_2;} | |
else if (now < POSTSALE_START) {currentStage = LifecycleStage.CROWDSALE_PHASE_3;} | |
else {currentStage = LifecycleStage.POSTSALE;} | |
} | |
_; | |
} | |
function getCurrentRate() constant returns (uint _rate) { | |
if (currentStage == LifecycleStage.CROWDSALE_PHASE_1) {_rate = 1150;} | |
else if (currentStage == LifecycleStage.CROWDSALE_PHASE_2) {_rate = 1100;} | |
else if (currentStage == LifecycleStage.CROWDSALE_PHASE_3) {_rate = 1050;} | |
else {_rate == 0;} | |
return _rate; | |
} | |
function TssCrowdsale( | |
uint256 _rate, | |
address _wallet, | |
uint256 _phase_1_start, | |
uint256 _phase_2_start, | |
uint256 _phase_3_start, | |
uint256 _postsale_start, | |
address _founder_wallet, | |
address _bounty_wallet, | |
address _future_wallet, | |
address _presale_wallet) | |
public | |
Crowdsale(_phase_1_start, _postsale_start, _rate, _wallet) | |
{ | |
// Initialise date milestones | |
CROWDSALE_PHASE_1_START = _phase_1_start; | |
CROWDSALE_PHASE_2_START = _phase_2_start; | |
CROWDSALE_PHASE_3_START = _phase_3_start; | |
POSTSALE_START = _postsale_start; | |
// Initialise Wallet Addresses | |
FOUNDER_WALLET = _founder_wallet; | |
BOUNTY_WALLET = _bounty_wallet; | |
FUTURE_WALLET = _future_wallet; | |
PRESALE_WALLET = _presale_wallet; | |
CROWDSALE_WALLET = address(this); | |
assertValidParameters(); | |
// Mint Tokens | |
currentStage = LifecycleStage.MINTING; | |
mintTokens(); | |
token.finishMinting(); | |
currentStage = LifecycleStage.PRESALE; | |
} | |
function mintTokens() internal { | |
/** Token Initial Distribution | |
* 100 000 000 to founder wallet | |
* 25 000 000 to bounty wallet | |
* 275 000 000 to future wallet | |
* 97 000 000 to crowdsale wallet | |
* 3 000 000 to presale wallet | |
*/ | |
TssToken _token = TssToken(token); | |
token.mint(FOUNDER_WALLET, 100000000 * 10 ** _token.decimals()); | |
token.mint(BOUNTY_WALLET, 25000000 * 10 ** _token.decimals()); | |
token.mint(FUTURE_WALLET, 275000000 * 10 ** _token.decimals()); | |
token.mint(CROWDSALE_WALLET, 97000000 * 10 ** _token.decimals()); | |
token.mint(PRESALE_WALLET, 3000000 * 10 ** _token.decimals()); | |
} | |
/** | |
* Overrides Crowdsale.buyTokens() | |
*/ | |
function buyTokens(address beneficiary) public | |
payable | |
whenNotPaused() | |
ensureStage() | |
{ | |
require(beneficiary != 0x0); | |
require(validPurchase()); | |
uint256 weiAmount = msg.value; | |
// calculate token amount to be created | |
uint256 tokens = weiAmount.mul(getCurrentRate()); | |
// update state | |
weiRaised = weiRaised.add(weiAmount); | |
token.transfer(beneficiary, tokens); | |
TokenPurchase(msg.sender, beneficiary, weiAmount, tokens); | |
forwardFunds(); | |
} | |
/** | |
* Overrides Crowdsale.validPurchase() | |
*/ | |
function validPurchase() internal constant returns (bool) { | |
bool withinPeriod = currentStage >= LifecycleStage.CROWDSALE_PHASE_1 && currentStage <= LifecycleStage.CROWDSALE_PHASE_3; | |
bool minimumPurchase = msg.value > 0.01 ether; | |
return withinPeriod && minimumPurchase; | |
} | |
/** | |
* Overrides Crowdsale.createTokenContract() | |
*/ | |
function createTokenContract() internal returns (MintableToken) { | |
return new TssToken(0x0, 0); | |
} | |
event CoinsRetrieved(address indexed recipient, uint amount); | |
function retrieveRemainingCoinsPostSale() | |
public | |
onlyOwner | |
ensureStage() | |
{ | |
require(currentStage == LifecycleStage.POSTSALE); | |
uint coinBalance = token.balanceOf(CROWDSALE_WALLET); | |
token.transfer(FUTURE_WALLET, coinBalance); | |
CoinsRetrieved(FUTURE_WALLET, coinBalance); | |
} | |
/** | |
There shouldn't be any funds trapped in this contract | |
but as a failsafe if there are any funds whatsoever, this function exists | |
*/ | |
function retrieveFunds() | |
public | |
onlyOwner | |
{ | |
owner.transfer(this.balance); | |
} | |
} |
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