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Smart Contract in Remix with Solidity 0.4.14
pragma solidity ^0.4.11;
/**
* @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;
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
function Ownable() internal {
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) public onlyOwner {
require(newOwner != address(0));
owner = newOwner;
}
}
/**
* @title Authorizable
* @dev Allows to authorize access to certain function calls
*
* ABI
* [{"constant":true,"inputs":[{"name":"authorizerIndex","type":"uint256"}],"name":"getAuthorizer","outputs":[{"name":"","type":"address"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_addr","type":"address"}],"name":"addAuthorized","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"_addr","type":"address"}],"name":"isAuthorized","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"inputs":[],"payable":false,"type":"constructor"}]
*/
contract Authorizable {
address[] authorizers;
mapping(address => uint256) authorizerIndex;
/**
* @dev Throws if called by any account that is not authorized.
*/
modifier onlyAuthorized {
require(isAuthorized(msg.sender));
_;
}
/**
* @dev Contructor that authorizes the msg.sender.
*/
function Authorizable() internal {
authorizers.length = 2;
authorizers[1] = msg.sender;
authorizerIndex[msg.sender] = 1;
}
/**
* @dev Function to get a specific authorizer
* @param authIndex index of the authorizer to be retrieved.
* @return The address of the authorizer.
*/
function getAuthorizer(uint256 authIndex) external constant returns(address) {
return address(authorizers[authIndex + 1]);
}
/**
* @dev Function to check if an address is authorized
* @param _addr the address to check if it is authorized.
* @return boolean flag if address is authorized.
*/
function isAuthorized(address _addr) internal constant returns(bool) {
return authorizerIndex[_addr] > 0;
}
/**
* @dev Function to add a new authorizer
* @param _addr the address to add as a new authorizer.
*/
function addAuthorized(address _addr) external onlyAuthorized {
authorizerIndex[_addr] = authorizers.length;
authorizers.length++;
authorizers[authorizers.length - 1] = _addr;
}
}
/**
* @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;
assert(c >= a);
return c;
}
}
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
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);
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
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);
}
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is ERC20Basic {
using SafeMath for uint;
mapping(address => uint256) balances;
/**
* @dev Fix for the ERC20 short address attack.
*/
modifier onlyPayloadSize(uint256 size) {
require(msg.data.length >= size + 4);
_;
}
/**
* @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) onlyPayloadSize(2 * 32) public returns (bool) {
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];
}
}
/**
* @title Standard ERC20 token
*
* @dev Implemantation of the basic standart 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 BasicToken, ERC20 {
mapping (address => mapping (address => uint256)) 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 uint the amout of tokens to be transfered
*/
function transferFrom(address _from, address _to, uint256 _value) onlyPayloadSize(3 * 32) public returns (bool) {
var _allowance = allowed[_from][msg.sender];
// Check is not needed because sub(_allowance, _value) will already throw if this condition is not met
// if (_value > _allowance) throw;
balances[_to] = balances[_to].add(_value);
balances[_from] = balances[_from].sub(_value);
allowed[_from][msg.sender] = _allowance.sub(_value);
Transfer(_from, _to, _value);
return true;
}
/**
* @dev Aprove the passed address to spend the specified amount of tokens on beahlf of msg.sender.
* @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) {
// 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);
return true;
}
/**
* @dev Function to check the amount of tokens than 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 uint specifing the amount of tokens still avaible for the spender.
*/
function allowance(address _owner, address _spender) public constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
}
/**
* @title Mintable token
* @dev Simple ERC20 Token example, with mintable token creation
* @dev Issue: * https://github.com/OpenZeppelin/zeppelin-solidity/issues/120
* Based on code by TokenMarketNet: https://github.com/TokenMarketNet/ico/blob/master/contracts/MintableToken.sol
*/
contract MintableToken is StandardToken, Ownable {
event Mint(address indexed to, uint256 value);
event MintFinished();
bool public mintingFinished = false;
modifier canMint() {
require(!mintingFinished);
_;
}
/**
* @dev Function to mint tokens
* @param _to The address that will recieve 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) public onlyOwner canMint returns (bool) {
totalSupply = totalSupply.add(_amount);
balances[_to] = balances[_to].add(_amount);
Mint(_to, _amount);
return true;
}
/**
* @dev Function to stop minting new tokens.
* @return True if the operation was successful.
*/
function finishMinting() public onlyOwner returns (bool) {
mintingFinished = true;
MintFinished();
return true;
}
}
/**
* @title Test Token Contract
* @dev The main Test Token Contract
*
* ABI
* [{"constant":true,"inputs":[],"name":"mintingFinished","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_value","type":"uint256"}],"name":"approve","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_from","type":"address"},{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transferFrom","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_amount","type":"uint256"}],"name":"mint","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"tradingStarted","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_startStop","type":"bool"}],"name":"startTrading","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"}],"name":"balanceOf","outputs":[{"name":"balance","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"finishMinting","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transfer","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"},{"name":"_spender","type":"address"}],"name":"allowance","outputs":[{"name":"remaining","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"anonymous":false,"inputs":[{"indexed":true,"name":"to","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Mint","type":"event"},{"anonymous":false,"inputs":[],"name":"MintFinished","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"owner","type":"address"},{"indexed":true,"name":"spender","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"from","type":"address"},{"indexed":true,"name":"to","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Transfer","type":"event"}]
*/
contract TestToken is MintableToken {
string public name = "Test Token";
string public symbol = “TEST”;
uint public decimals = 18;
bool public tradingStarted = false;
/**
* @dev modifier that throws if trading has not started yet
*/
modifier hasStartedTrading() {
require(tradingStarted);
_;
}
/**
* @dev Allows the owner to start/stop the trading.
*/
function startTrading(bool _startStop) public onlyOwner {
tradingStarted = _startStop;
}
/**
* @dev Allows anyone to transfer the tokens once trading has started
* @param _to the recipient address of the tokens.
* @param _value number of tokens to be transfered.
*/
function transfer(address _to, uint256 _value) public hasStartedTrading returns (bool) {
super.transfer(_to, _value);
return true;
}
/**
* @dev Allows anyone to transfer the tokens once trading has started
* @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 uint the amout of tokens to be transfered
*/
function transferFrom(address _from, address _to, uint256 _value) public hasStartedTrading returns (bool) {
super.transferFrom(_from, _to, _value);
return true;
}
}
/**
* @title a Test Sale Contract
* @dev The main Test Sale Contract
*
* ABI
* [{"constant":true,"inputs":[],"name":"ended","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"rate","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"Vault","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"authIndex","type":"uint256"}],"name":"getAuthorizer","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"weiRaised","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"recipient","type":"address"},{"name":"tokens","type":"uint256"}],"name":"authorizedCreateTokens","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_startStop","type":"bool"}],"name":"startTrading","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"keys","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_Vault","type":"address"}],"name":"setVault","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_rate","type":"uint256"}],"name":"changeRate","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"minPay","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"selfDestruct","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_token","type":"address"}],"name":"retrieveTokens","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_minPay","type":"uint256"}],"name":"changeMinPay","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"start","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"recipient","type":"address"}],"name":"createTokens","outputs":[],"payable":true,"stateMutability":"payable","type":"function"},{"constant":false,"inputs":[{"name":"_addr","type":"address"}],"name":"addAuthorized","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[],"name":"collect","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[],"name":"closeSale","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_ended","type":"bool"}],"name":"setEnd","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"key","type":"string"}],"name":"register","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_start","type":"uint256"}],"name":"setStart","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"token","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"_addr","type":"address"}],"name":"isAuthorized","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"payable":true,"stateMutability":"payable","type":"fallback"},{"anonymous":false,"inputs":[{"indexed":false,"name":"recipient","type":"address"},{"indexed":false,"name":"wei_amount","type":"uint256"},{"indexed":false,"name":"token_amount","type":"uint256"},{"indexed":false,"name":"rate","type":"uint256"}],"name":"LogBuy","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"recipient","type":"address"},{"indexed":false,"name":"pay_amount","type":"uint256"}],"name":"LogAuthCreate","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"issuedSupply","type":"uint256"},{"indexed":false,"name":"restrictedTokens","type":"uint256"}],"name":"LogSaleClosed","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"user","type":"address"},{"indexed":false,"name":"key","type":"string"}],"name":"LogRegister","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"amount","type":"uint256"}],"name":"LogCollect","type":"event"}]
*/
contract TestSale is Ownable, Authorizable {
using SafeMath for uint256;
event LogBuy(address recipient, uint256 wei_amount, uint256 token_amount, uint256 rate);
event LogAuthCreate(address recipient, uint256 pay_amount);
event LogSaleClosed(uint256 issuedSupply, uint256 restrictedTokens);
event LogRegister(address user, string key);
event LogCollect(uint256 amount);
TestToken public token = new TestToken();
//address public Vault = 0xcaccccccccccccccccccccccccccccccccccccccccc; // remix wallet
address public Vault = 0xcadddddddddddddddddddddddddddddddddddd; // MetaMask Ropsten Account 1
// how many token units a buyer gets per ether
uint256 public rate = 10000000000000000000000; // 10k tokens per ether
bool public ended = false;
// amount of raised money in wei
uint256 public weiRaised = 0;
uint256 public minPay = 10000000000000000; // 0.01 ether
mapping (address => string) public keys;
/**
* @dev Allows anyone to create tokens by depositing ether.
* @param recipient = address to receive tokens.
*/
function createTokens(address recipient) public payable {
require(recipient != 0x0);
require(validPurchase());
uint256 tokens = rate.mul(msg.value).div(1 ether);
weiRaised = weiRaised.add(msg.value);
LogBuy(recipient, msg.value, tokens, rate);
require(token.mint(recipient, tokens));
}
// @return true if the transaction can buy tokens
function validPurchase() internal constant returns (bool) {
bool minPurchase = msg.value >= minPay;
return !ended && minPurchase;
}
/**
* @dev Let owner collect ETH
*/
function collect() external onlyOwner returns (uint256) {
LogCollect(this.balance);
Vault.transfer(this.balance);
return this.balance;
}
/**
* @dev Allows the owner to set the Vault address
* @param _Vault the Vault address
*/
function setVault(address _Vault) public onlyOwner {
require(_Vault != 0x0);
if (_Vault != address(0)) {
Vault = _Vault;
}
}
/**
* @dev Allows the owner to set the rate.
* @param _rate the exchangerate
*/
function changeRate(uint256 _rate) public onlyOwner {
require(_rate > 0);
rate = _rate;
}
/**
* @dev Allows the owner to close sale. This will create the
* restricted tokens.
* Then ownership of token contract is transfered
* to owner of sale contract.
*/
function closeSale() public onlyOwner returns (bool) {
ended = true;
uint256 issuedTokenSupply = token.totalSupply();
uint256 restrictedTokens = issuedTokenSupply.mul(42857).div(100000);
LogSaleClosed(issuedTokenSupply, restrictedTokens);
require(token.mint(Vault, restrictedTokens));
token.finishMinting();
token.transferOwnership(owner);
return true;
}
/**
* @dev Fallback function which receives ether and created the appropriate number of tokens for the
* msg.sender.
*/
function() external payable {
createTokens(msg.sender);
}
/**
* @dev Allows the owner to end the sale.
* @param _ended - true or false
*/
function setEnd(bool _ended) public onlyOwner returns (bool) {
ended = _ended;
return ended;
}
/**
* @dev Allows the owner to change minimum payment.
* @param _minPay = minimum payment
*/
function changeMinPay(uint256 _minPay) external onlyOwner returns (bool) {
minPay = _minPay;
return true;
}
/**
* @dev Allows the owner start or stop trading
* @param _startStop = true or false
*/
function startTrading(bool _startStop) external onlyOwner {
token.startTrading(_startStop);
}
/**
* @dev Allows the owner to destroy contract
*/
function selfDestruct() external onlyOwner returns (bool) {
selfdestruct(Vault);
return true;
}
/**
* @dev For user to register their new public key to map holder's tokens to new blockchain tokens
* Read full key import policy. Manually registering requires a base58
* encoded using the STEEM, BTS, or EOS public key format, for now. Subject to change.
* @param key = holder's public key
*/
function register(string key) external {
assert(bytes(key).length <= 64);
keys[msg.sender] = key;
LogRegister(msg.sender, key);
}
/**
* @dev Allows authorized access to create tokens. This is used to pay helpers.
* @param recipient = address to receive tokens.
* @param tokens = number of tokens to be created.
*/
function authorizedCreateTokens(address recipient, uint tokens) public onlyAuthorized {
require(tokens > 10000000000000000000 && tokens <= 20000000000000000000000); // > 50 & <= 20000 tokens
LogAuthCreate(recipient, tokens);
require(token.mint(recipient, tokens));
}
/**
* @dev Allows owner to transfer ERC20 tokens to vault
* @param _token the contract address of the ERC20 contract
*/
function retrieveTokens(address _token) public onlyOwner {
ERC20 erctoken = ERC20(_token);
erctoken.transfer(Vault, erctoken.balanceOf(this));
}
}
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