Created
October 23, 2017 15:57
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pragma solidity ^0.4.18; | |
/** | |
* @title Ownable | |
* @dev The Ownable contract has an owner address, and provides basic authorization control | |
* functions, this simplifies the implementation of "user permissions". | |
*/ | |
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() public { | |
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 LamdenTau is Ownable, MintableToken { | |
string public constant name = "Lamden Tau"; | |
string public constant symbol = "TAU"; | |
uint8 public constant decimals = 18; | |
// how many ethers have been raised, as contract will not hold any ether | |
uint256 public currentRaise = 0; | |
// addresses for fund management and permissioning | |
address public wallet; | |
uint256 public launchTime = 0; // used to determine ico spending cap | |
uint256 public constant UNIX_DAY = 86400; // how many seconds in a day. calculates the days from launch time | |
// whitelists | |
mapping (address => bool) public presaleWhitelist; | |
mapping (address => bool) public icoWhitelist; | |
// ico cap variables | |
mapping (address => uint256) amountContributedBy; | |
uint256 amountPerDay = 30 * (10 ** 18); // 30 eth | |
modifier onlyPresaleWhitelist() | |
{ | |
require(presaleWhitelist[msg.sender]); | |
_; | |
} | |
modifier onlyicoWhitelist() | |
{ | |
require(icoWhitelist[msg.sender]); | |
_; | |
} | |
// a simple struct to hold information about a sale | |
struct Sale { | |
uint256 start; | |
uint256 stop; | |
uint256 cap; | |
uint256 price; | |
uint256 sold; | |
} | |
// the two sales | |
Sale public presale; | |
Sale public ico; | |
function LamdenTau( | |
uint256 _pstart, | |
uint256 _pstop, | |
uint256 _pcap, | |
uint256 _pprice, | |
uint256 _istart, | |
uint256 _istop, | |
uint256 _icap, | |
uint256 _iprice, | |
address _wallet) public | |
{ | |
// sanity checks | |
require (_pstart < _pstop && _pstop < _istart && _istart < _istop); // presale can't start and stop before the ico | |
require (_pcap < _icap); // presale cap must be less than ico cap | |
require (_pprice < _iprice); // presale price must be less than ico price | |
// set the sale structs for reference at purchase time | |
presale = Sale(_pstart, _pstop, _pcap, _pprice, 0); | |
ico = Sale(_istart, _istop, _icap, _iprice, 0); | |
// set where the ethers are stored | |
wallet = _wallet; | |
// allocations go here | |
// set launch time to now | |
launchTime = now; | |
} | |
function() payable public { | |
if (now > presale.start && now < presale.stop) presalePurchase(); | |
else if (now > ico.start && now < ico.stop) icoPurchase(); | |
else revert(); | |
} | |
function presalePurchase() internal onlyPresaleWhitelist returns(bool) { | |
uint256 tokenAmount = msg.value.div(presale.price); | |
uint256 tokensLeft = presale.cap.sub(presale.sold.add(tokenAmount)); | |
if (tokensLeft > 0) { | |
wallet.send(this.value); | |
presale.sold = presale.sold.add(tokenAmount); | |
mint(tokenAmount, msg.sender); | |
return true; | |
} | |
else revert(); | |
} | |
function icoPurchase() internal onlyicoWhitelist returns(bool) { | |
uint256 tokenAmount = msg.value.div(ico.price); | |
uint256 tokensLeft = ico.cap.sub(ico.sold.add(tokenAmount)); | |
uint256 contributionCeiling = amountPerDay.mul((2 ** daysSinceLaunch)); | |
uint256 personalCeiling = contributionCeiling.sub(amountContributedBy[msg.sender]); | |
if (tokensLeft > 0 && personalCeiling > 0) { | |
wallet.send(this.value); | |
ico.sold = ico.sold.add(tokenAmount); | |
mint(tokenAmount, msg.sender); | |
uint256 tokenLeftUntilClose = ico.cap.sub(ico.sold); | |
if (tokenLeftUntilClose <= 0) finishMinting(); | |
return true; | |
} | |
else revert(); | |
} | |
function addToPresaleWhitelist(address _a) internal onlyOwner returns(bool) { | |
presaleWhitelist[_a] = true; | |
return presaleWhitelist[_a]; | |
} | |
function addtoICOWhitelist(address _a) internal onlyOwner returns(bool) { | |
icoWhitelist[_a] = true; | |
return icoWhitelist[_a]; | |
} | |
function daysSinceLaunch() public view returns(uint256) { | |
return (now.sub(launchTime)) % UNIX_DAY; | |
} | |
} |
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