Contract Name:
CoinnupToken
Contract Source Code:
File 1 of 1 : CoinnupToken
pragma solidity ^0.4.23;
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
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 a / b;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
/**
* @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.
*/
constructor() 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) public onlyOwner {
require(newOwner != address(0));
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/179
*/
contract ERC20Basic {
function totalSupply() public view returns (uint256);
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 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 Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) balances;
uint256 public totalSupply_;
/**
* @dev total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @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));
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit 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 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)) public 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);
emit 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;
emit 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) {
return allowed[_owner][_spender];
}
/**
* @dev Increase the amount of tokens that an owner allowed to a 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
* @param _spender The address which will spend the funds.
* @param _addedValue The amount of tokens to increase the allowance by.
*/
function increaseApproval(address _spender, uint _addedValue) public returns (bool) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
/**
* @dev Decrease the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To decrement
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _subtractedValue The amount of tokens to decrease the allowance by.
*/
function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) {
uint oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}
/**
* @title CoinnupCrowdsaleToken
* @dev ERC20-compliant Token that can be minted.
*/
contract CoinnupToken is StandardToken, Ownable {
using SafeMath for uint256;
string public constant name = "Coinnup Coin"; // solium-disable-line uppercase
string public constant symbol = "PMZ"; // solium-disable-line uppercase
uint8 public constant decimals = 18; // solium-disable-line uppercase
/// @dev store how much in eth users invested to give them a refund in case refund happens
mapping ( address => uint256 ) public investments;
/// @dev to have how much one user bought tokens
mapping ( address => uint256 ) public tokensBought;
/// @dev event when someone bought tokens by ETH
event investmentReceived(
address sender,
uint weis,
uint total
);
uint256 public maxSupply = 298500000000000000000000000;
uint256 public allowedToBeSold = 118056750000000000000000000;
address public founder = address( 0x3abb86C7C1a533Eb0464E9BD870FD1b501C7A8A8 );
uint256 public rate = 2800;
uint256 public bonus = 30;
uint256 public softCap = 1850000000000000000000;
uint256 public _sold; //eth sold via payable function
/// @dev in this var we store eth when someone bought tokens
/// not sending it to smart contract but buying it privately
uint256 public _soldOutside; //wei sold not via SC
uint256 public _soldOutsidePMZ; //PMZ tokens sold not via SC
bool public isPaused;
struct Round {
uint256 openingTime;
uint256 closingTime;
uint256 allocatedCoins;
uint256 minPurchase;
uint256 maxPurchase;
uint256 soldCoins;
}
Round[] public rounds;
/** @dev Token cunstructor
*/
constructor () public {
require(maxSupply > 0);
require(founder != address(0));
require(rate > 0);
require(bonus >= 0 && bonus <= 100); // in percentage
require(allowedToBeSold > 0 && allowedToBeSold < maxSupply);
require(softCap > 0);
for (uint8 i = 0; i < 6; i++) {
rounds.push( Round(0, 0, 0, 0, 0, 0) );
}
// mint tokens which initially belongs to founder
uint256 _forFounder = maxSupply.sub(allowedToBeSold);
mint(founder, _forFounder);
// waiting for admin to set round dates
// and to unpause by admin
triggerICOState(true);
}
/// @dev in payable we shold keep only forwarding call
function () public onlyWhileOpen isNotPaused payable {
require(_buyTokens(msg.sender, msg.value));
}
/**
* @dev gets `_sender` and `_value` as input and sells tokens with bonus
* throws if not enough tokens after calculation
* @return isSold bool whether tokens bought
*/
function _buyTokens(address _sender, uint256 _value) internal isNotPaused returns (bool) {
uint256 amount = _getTokenAmount(_value, bonus);
uint256 amount_without_bonus = _getTokenAmount(_value, 0);
uint8 _currentRound = _getCurrentRound(now);
require(rounds[_currentRound].allocatedCoins >= amount.add(rounds[_currentRound].soldCoins));
require(totalSupply_.add(amount) <= maxSupply); // if we have enough tokens to be minted
require(
rounds[_currentRound].minPurchase <= amount_without_bonus &&
rounds[_currentRound].maxPurchase >= amount_without_bonus
);
_sold = _sold.add(_value); // in wei
investments[_sender] = investments[_sender].add(_value); // in wei
// minting tokens for investores
// after we recorded how much he sent ether and other params
mint(_sender, amount);
rounds[_currentRound].soldCoins = rounds[_currentRound].soldCoins.add(amount);
tokensBought[_sender] = tokensBought[_sender].add(amount);
emit investmentReceived(
_sender,
_value,
amount_without_bonus
);
return true;
}
/// @dev system can mint tokens for users if they sent funds to BTC, LTC, etc wallets we allow
function mintForInvestor(address _to, uint256 _tokens, uint256 _tokens_bonus) public onlyOwner onlyWhileOpen {
uint8 _round = _getCurrentRound(now);
uint256 _tokens_with_bonuses = _tokens.add(_tokens_bonus);
require(_round >= 0 && _round <= 5);
require(_to != address(0)); // handling incorrect values from system in addresses
require(_tokens >= 0); // handling incorrect values from system in tokens calculation
require(rounds[_round].allocatedCoins >= _tokens_with_bonuses.add(rounds[_round].soldCoins));
require(maxSupply >= _tokens_with_bonuses.add(totalSupply_));
require(_tokens > _tokens_bonus);
require(
rounds[_round].minPurchase <= _tokens && // Min Max purchases without bonuses
rounds[_round].maxPurchase >= _tokens
);
// minting tokens for investors
mint(_to, _tokens_with_bonuses); // _tokens in wei
rounds[_round].soldCoins = rounds[_round].soldCoins.add(_tokens_with_bonuses);
tokensBought[_to] = tokensBought[_to].add(_tokens_with_bonuses); // tokens in wei
uint256 _soldInETH = _tokens.div( rate ); // Calc without bonuses
_sold = _sold.add(_soldInETH); // in wei
_soldOutside = _soldOutside.add(_soldInETH); // eth
_soldOutsidePMZ = _soldOutsidePMZ.add(_tokens_with_bonuses); // in PMZ
}
/**
* @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) internal {
totalSupply_ = totalSupply_.add(_amount);
balances[_to] = balances[_to].add(_amount);
emit Transfer(address(this), _to, _amount);
}
/**
* @dev The way in which ether is converted to tokens.
* @param _weiAmount Value in wei to be converted into tokens
* @param _bonus Bonus in percents
* @return Number of tokens that can be purchased with the specified _weiAmount
*/
function _getTokenAmount(uint256 _weiAmount, uint _bonus) internal view returns (uint256) {
uint256 _coins_in_wei = rate.mul(_weiAmount);
uint256 _bonus_value_in_wei = 0;
uint256 bonusValue = 0;
_bonus_value_in_wei = (_coins_in_wei.mul(_bonus)).div(100);
bonusValue = _bonus_value_in_wei;
uint256 coins = _coins_in_wei;
uint256 total = coins.add(bonusValue);
return total;
}
/**
* @dev sets a rate for ico rounds
* @param _rate Rate for token
*/
function setRate(uint256 _rate) public {
require(msg.sender == owner);
require(_rate > 0);
rate = _rate;
}
/// @dev get total coins sold per current round
function soldPerCurrentRound() public view returns (uint256) {
return rounds[_getCurrentRound(now)].soldCoins;
}
/// @dev pause and unpause an ICO, only sender allowed to
function triggerICOState(bool state) public onlyOwner {
isPaused = state;
}
/**
* @dev changes current bonus rate
* @param _bonus Bonus to change
* @return bool - Changed or not
*/
function setBonus(uint256 _bonus) onlyOwner public {
require(_bonus >= 0 && _bonus <= 100); //%
bonus = _bonus;
}
/// @dev gets number of current round
function _getCurrentRound(uint256 _time) public view returns (uint8) {
for (uint8 i = 0; i < 6; i++) {
if (rounds[i].openingTime < _time && rounds[i].closingTime > _time) {
return i;
}
}
return 100; // if using 6 in 5 length array it will throw
}
function setRoundParams(
uint8 _round,
uint256 _openingTime,
uint256 _closingTime,
uint256 _maxPurchase,
uint256 _minPurchase,
uint256 _allocatedCoins
) public onlyOwner {
rounds[_round].openingTime = _openingTime;
rounds[_round].closingTime = _closingTime;
rounds[_round].maxPurchase = _maxPurchase;
rounds[_round].minPurchase = _minPurchase;
rounds[_round].allocatedCoins = _allocatedCoins;
}
/**
* @dev withdrawing funds to founder's wallet
* @return bool Whether success or not
*/
function withdraw() public {
// only founder is able to withdraw funds
require(msg.sender == founder);
founder.transfer(address(this).balance);
}
/**
* @dev Claims for refund if ICO finished and soft cap not reached
*/
function refund() public whenICOFinished capNotReached {
require(investments[msg.sender] > 0);
msg.sender.transfer(investments[msg.sender]);
investments[msg.sender] = 0;
}
modifier onlyWhileOpen {
uint8 _round = _getCurrentRound(now);
require(_round >= 0 && _round <= 5); // we have 6 rounds, other values are invalid
_;
}
/// @dev when ico finishes we can perform other actions
modifier whenICOFinished {
uint8 _round = _getCurrentRound(now);
require(_round < 0 || _round > 5); // if we do not get current valid round number ICO finished
_;
}
/// @dev _sold in weis, softCap in weis
modifier capNotReached {
require(softCap > _sold);
_;
}
/// @dev if isPaused true then investments cannot be accepted
modifier isNotPaused {
require(!isPaused);
_;
}
}