Contract Source Code:
File 1 of 1 : LockChain
pragma solidity ^0.4.11;
/* taking ideas from FirstBlood token */
contract SafeMath {
function safeAdd(uint256 x, uint256 y) internal returns(uint256) {
uint256 z = x + y;
assert((z >= x) && (z >= y));
return z;
}
function safeSubtract(uint256 x, uint256 y) internal returns(uint256) {
assert(x >= y);
uint256 z = x - y;
return z;
}
function safeMult(uint256 x, uint256 y) internal returns(uint256) {
uint256 z = x * y;
assert((x == 0)||(z/x == y));
return z;
}
}
contract Token {
uint256 public totalSupply;
function balanceOf(address _owner) constant returns (uint256 balance);
function transfer(address _to, uint256 _value) returns (bool success);
function transferFrom(address _from, address _to, uint256 _value) returns (bool success);
function approve(address _spender, uint256 _value) returns (bool success);
function allowance(address _owner, address _spender) constant returns (uint256 remaining);
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
/* ERC 20 token */
contract StandardToken is Token {
function transfer(address _to, uint256 _value) returns (bool success) {
if (balances[msg.sender] >= _value && _value > 0) {
balances[msg.sender] -= _value;
balances[_to] += _value;
Transfer(msg.sender, _to, _value);
return true;
} else {
return false;
}
}
function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {
if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && _value > 0) {
balances[_to] += _value;
balances[_from] -= _value;
allowed[_from][msg.sender] -= _value;
Transfer(_from, _to, _value);
return true;
} else {
return false;
}
}
function balanceOf(address _owner) constant returns (uint256 balance) {
return balances[_owner];
}
function approve(address _spender, uint256 _value) returns (bool success) {
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
mapping (address => uint256) balances;
mapping (address => mapping (address => uint256)) allowed;
}
contract LockChain is StandardToken, SafeMath {
// metadata
string public constant name = "LockChain";
string public constant symbol = "LOC";
uint256 public constant decimals = 18;
string public version = "1.0";
// contracts
address public LockChainFundDeposit; // deposit address for depositing tokens for owners
address public account1Address; // deposit address for depositing tokens for owners
address public account2Address;
address public creatorAddress;
// crowdsale parameters
bool public isFinalized; // switched to true in operational state
bool public isPreSale;
bool public isPrePreSale;
bool public isMainSale;
uint public preSalePeriod;
uint public prePreSalePeriod;
uint256 public tokenExchangeRate = 0; // LockChain tokens per 1 ETH
uint256 public constant tokenSaleCap = 155 * (10**6) * 10**decimals;
uint256 public constant tokenPreSaleCap = 50 * (10**6) * 10**decimals;
// events
event CreateLOK(address indexed _to, uint256 _value);
// constructor
function LockChain()
{
isFinalized = false; //controls pre through crowdsale state
LockChainFundDeposit = '0x013aF31dc76255d3b33d2185A7148300882EbC7a';
account1Address = '0xe0F2653e7928e6CB7c6D3206163b3E466a29c7C3';
account2Address = '0x25BC70bFda877e1534151cB92D97AC5E69e1F53D';
creatorAddress = '0x953ebf6C38C58C934D58b9b17d8f9D0F121218BB';
isPrePreSale = false;
isPreSale = false;
isMainSale = false;
totalSupply = 0;
}
/// @dev Accepts ether and creates new LOK tokens.
function () payable {
if (isFinalized) throw;
if (!isPrePreSale && !isPreSale && !isMainSale) throw;
//if (!saleStarted) throw;
if (msg.value == 0) throw;
//create tokens
uint256 tokens = safeMult(msg.value, tokenExchangeRate); // check that we're not over totals
uint256 checkedSupply = safeAdd(totalSupply, tokens);
if(!isMainSale){
if (tokenPreSaleCap < checkedSupply) throw;
}
// return money if something goes wrong
if (tokenSaleCap < checkedSupply) throw; // odd fractions won't be found
totalSupply = checkedSupply;
//All good. start the transfer
balances[msg.sender] += tokens; // safeAdd not needed
CreateLOK(msg.sender, tokens); // logs token creation
}
/// LockChain Ends the funding period and sends the ETH home
function finalize() external {
if (isFinalized) throw;
if (msg.sender != LockChainFundDeposit) throw; // locks finalize to the ultimate ETH owner
uint256 newTokens = totalSupply;
uint256 account1Tokens;
uint256 account2Tokens;
uint256 creatorTokens = 10000 * 10**decimals;
uint256 LOKFundTokens;
uint256 checkedSupply = safeAdd(totalSupply, newTokens);
totalSupply = checkedSupply;
if (newTokens % 2 == 0){
LOKFundTokens = newTokens/2;
account2Tokens = newTokens/2;
account1Tokens = LOKFundTokens - creatorTokens;
balances[account1Address] += account1Tokens;
balances[account2Address] += account2Tokens;
}
else{
uint256 makeEven = newTokens - 1;
uint256 halfTokens = makeEven/2;
LOKFundTokens = halfTokens;
account2Tokens = halfTokens + 1;
account1Tokens = LOKFundTokens - creatorTokens;
balances[account1Address] += account1Tokens;
balances[account2Address] += account2Tokens;
}
balances[creatorAddress] += creatorTokens;
CreateLOK(creatorAddress, creatorTokens);
CreateLOK(account1Address, account1Tokens);
CreateLOK(account2Address, account2Tokens);
// move to operational
if(!LockChainFundDeposit.send(this.balance)) throw;
isFinalized = true; // send the eth to LockChain
}
function switchSaleStage() external {
if (msg.sender != LockChainFundDeposit) throw; // locks finalize to the ultimate ETH owner
if(isMainSale) throw;
if(!isPrePreSale){
isPrePreSale = true;
tokenExchangeRate = 1150;
}
else if (!isPreSale){
isPreSale = true;
tokenExchangeRate = 1000;
}
else if (!isMainSale){
isMainSale = true;
if (totalSupply < 10 * (10**6) * 10**decimals)
{
tokenExchangeRate = 750;
}
else if (totalSupply >= 10 * (10**6) * 10**decimals && totalSupply < 20 * (10**6) * 10**decimals)
{
tokenExchangeRate = 700;
}
else if (totalSupply >= 20 * (10**6) * 10**decimals && totalSupply < 30 * (10**6) * 10**decimals)
{
tokenExchangeRate = 650;
}
else if (totalSupply >= 30 * (10**6) * 10**decimals && totalSupply < 40 * (10**6) * 10**decimals)
{
tokenExchangeRate = 620;
}
else if (totalSupply >= 40 * (10**6) * 10**decimals && totalSupply <= 50 * (10**6) * 10**decimals)
{
tokenExchangeRate = 600;
}
}
}
}