// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
}
interface ItokenRecipient {
function receiveApproval(address _from, uint256 _value, address _token, bytes calldata _extraData) external returns (bool);
}
interface IERC20Token {
function totalSupply() external view returns (uint256 supply);
function transfer(address _to, uint256 _value) external returns (bool success);
function transferFrom(address _from, address _to, uint256 _value) external returns (bool success);
function balanceOf(address _owner) external view returns (uint256 balance);
function approve(address _spender, uint256 _value) external returns (bool success);
function allowance(address _owner, address _spender) external view returns (uint256 remaining);
}
contract Ownable {
address private owner;
event OwnerSet(address indexed oldOwner, address indexed newOwner);
modifier onlyOwner() {
require(msg.sender == owner, "Caller is not owner");
_;
}
constructor() {
owner = msg.sender; // 'msg.sender' is sender of current call, contract deployer for a constructor
emit OwnerSet(address(0), owner);
}
function changeOwner(address newOwner) public onlyOwner {
emit OwnerSet(owner, newOwner);
owner = newOwner;
}
function getOwner() external view returns (address) {
return owner;
}
}
contract StandardToken is IERC20Token {
using SafeMath for uint256;
mapping (address => uint256) public balances;
mapping (address => mapping (address => uint256)) public allowed;
uint256 public _totalSupply;
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
function totalSupply() override public view returns (uint256 supply) {
return _totalSupply;
}
function transfer(address _to, uint256 _value) override virtual public returns (bool success) {
require(_to != address(0x0), "Use burn function instead");
require(_value >= 0, "Invalid amount");
require(balances[msg.sender] >= _value, "Not enough balance");
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
function transferFrom(address _from, address _to, uint256 _value) override virtual public returns (bool success) {
require(_to != address(0x0), "Use burn function instead");
require(_value >= 0, "Invalid amount");
require(balances[_from] >= _value, "Not enough balance");
require(allowed[_from][msg.sender] >= _value, "You need to increase allowance");
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(_from, _to, _value);
return true;
}
function balanceOf(address _owner) override public view returns (uint256 balance) {
return balances[_owner];
}
function approve(address _spender, uint256 _value) override public returns (bool success) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) override public view returns (uint256 remaining) {
return allowed[_owner][_spender];
}
}
contract POLCToken is Ownable, StandardToken {
using SafeMath for uint256;
string public name = "Polka City";
uint8 public decimals = 18;
string public symbol = "POLC";
// Time lock for progressive release of team, marketing and platform balances
struct TimeLock {
uint256 totalAmount;
uint256 lockedBalance;
uint128 baseDate;
uint64 step;
uint64 tokensStep;
}
mapping (address => TimeLock) public timeLocks;
// Prevent Bots - If true, limits transactions to 1 transfer per block (whitelisted can execute multiple transactions)
bool public limitTransactions;
mapping (address => bool) public contractsWhiteList;
mapping (address => uint) public lastTXBlock;
event Burn(address indexed from, uint256 value);
// token sale
// Wallet for the tokens to be sold, and receive ETH
address payable public salesWallet;
uint256 public soldOnCSale;
uint256 public constant CROWDSALE_START = 1613926800;
uint256 public constant CROWDSALE_END = 1614556740;
uint256 public constant CSALE_WEI_FACTOR = 15000;
uint256 public constant CSALE_HARDCAP = 7500000 ether;
constructor() {
_totalSupply = 250000000 ether;
// Base date to calculate team, marketing and platform tokens lock
uint256 lockStartDate = 1613494800;
// Team wallet - 10000000 tokens
// 0 tokens free, 10000000 tokens locked - progressive release of 5% every 30 days (after 180 days of waiting period)
address team = 0x4ef5B3d10fD217AC7ddE4DDee5bF319c5c356723;
balances[team] = 10000000 ether;
timeLocks[team] = TimeLock(10000000 ether, 10000000 ether, uint128(lockStartDate + (180 days)), 30 days, 500000);
emit Transfer(address(0x0), team, balances[team]);
// Marketing wallet - 5000000 tokens
// 1000000 tokens free, 4000000 tokens locked - progressive release of 5% every 30 days
address marketingWallet = 0x056F878d4Ac07E66C9a46a8db4918E827c6fD71c;
balances[marketingWallet] = 5000000 ether;
timeLocks[marketingWallet] = TimeLock(4000000 ether, 4000000 ether, uint128(lockStartDate), 30 days, 200000);
emit Transfer(address(0x0), marketingWallet, balances[marketingWallet]);
// Private sale wallet - 2500000 tokens
address privateWallet = 0xED854fCF86efD8473F174d6dE60c8A5EBDdCc37A;
balances[privateWallet] = 2500000 ether;
emit Transfer(address(0x0), privateWallet, balances[privateWallet]);
// Sales wallet, holds Pre-Sale balance - 7500000 tokens
salesWallet = payable(0x4bb74E94c1EB133a6868C53aA4f6BD437F99c347);
balances[salesWallet] = 7500000 ether;
emit Transfer(address(0x0), salesWallet, balances[salesWallet]);
// Exchanges - 25000000 tokens
address exchanges = 0xE50d4358425a93702988eCd8B66c2EAD8b41CE5d;
balances[exchanges] = 25000000 ether;
emit Transfer(address(0x0), exchanges, balances[exchanges]);
// Platform wallet - 200000000 tokens
// 50000000 tokens free, 150000000 tokens locked - progressive release of 25000000 every 90 days
address platformWallet = 0xAD334543437EF71642Ee59285bAf2F4DAcBA613F;
balances[platformWallet] = 200000000 ether;
timeLocks[platformWallet] = TimeLock(150000000 ether, 150000000 ether, uint128(lockStartDate), 90 days, 25000000);
emit Transfer(address(0x0), platformWallet, balances[platformWallet]);
}
function transfer(address _to, uint256 _value) override public returns (bool success) {
require(checkTransferLimit(), "Transfers are limited to 1 per block");
require(_value <= (balances[msg.sender] - timeLocks[msg.sender].lockedBalance));
return super.transfer(_to, _value);
}
function transferFrom(address _from, address _to, uint256 _value) override public returns (bool success) {
require(checkTransferLimit(), "Transfers are limited to 1 per block");
require(_value <= (balances[_from] - timeLocks[_from].lockedBalance));
return super.transferFrom(_from, _to, _value);
}
function burn(uint256 _value) public returns (bool success) {
require(balances[msg.sender] >= _value, "Not enough balance");
require(_value >= 0, "Invalid amount");
balances[msg.sender] = balances[msg.sender].sub(_value);
_totalSupply = _totalSupply.sub(_value);
emit Burn(msg.sender, _value);
return true;
}
function approveAndCall(address _spender, uint256 _value, bytes memory _extraData) public returns (bool success) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
ItokenRecipient recipient = ItokenRecipient(_spender);
require(recipient.receiveApproval(msg.sender, _value, address(this), _extraData));
return true;
}
function releaseTokens(address _account) public {
uint256 timeDiff = block.timestamp - uint256(timeLocks[_account].baseDate);
require(timeDiff > uint256(timeLocks[_account].step), "Unlock point not reached yet");
uint256 steps = (timeDiff / uint256(timeLocks[_account].step));
uint256 unlockableAmount = ((uint256(timeLocks[_account].tokensStep) * 1 ether) * steps);
if (unlockableAmount >= timeLocks[_account].totalAmount) {
timeLocks[_account].lockedBalance = 0;
} else {
timeLocks[_account].lockedBalance = timeLocks[_account].totalAmount - unlockableAmount;
}
}
function checkTransferLimit() internal returns (bool txAllowed) {
address _caller = msg.sender;
if (limitTransactions == true && contractsWhiteList[_caller] != true) {
if (lastTXBlock[_caller] == block.number) {
return false;
} else {
lastTXBlock[_caller] = block.number;
return true;
}
} else {
return true;
}
}
function enableTXLimit() public onlyOwner {
limitTransactions = true;
}
function disableTXLimit() public onlyOwner {
limitTransactions = false;
}
function includeWhiteList(address _contractAddress) public onlyOwner {
contractsWhiteList[_contractAddress] = true;
}
function removeWhiteList(address _contractAddress) public onlyOwner {
contractsWhiteList[_contractAddress] = false;
}
function getLockedBalance(address _wallet) public view returns (uint256 lockedBalance) {
return timeLocks[_wallet].lockedBalance;
}
function buy() public payable {
require((block.timestamp > CROWDSALE_START) && (block.timestamp < CROWDSALE_END), "Contract is not selling tokens");
uint weiValue = msg.value;
require(weiValue >= (5 * (10 ** 16)), "Minimum amount is 0.05 eth");
require(weiValue <= (20 ether), "Maximum amount is 20 eth");
uint amount = CSALE_WEI_FACTOR * weiValue;
require((soldOnCSale) <= (CSALE_HARDCAP), "That quantity is not available");
soldOnCSale += amount;
balances[salesWallet] = balances[salesWallet].sub(amount);
balances[msg.sender] = balances[msg.sender].add(amount);
require(salesWallet.send(weiValue));
emit Transfer(salesWallet, msg.sender, amount);
}
function burnUnsold() public onlyOwner {
require(block.timestamp > CROWDSALE_END);
uint currentBalance = balances[salesWallet];
balances[salesWallet] = 0;
_totalSupply = _totalSupply.sub(currentBalance);
emit Burn(salesWallet, currentBalance);
}
}
{
"compilationTarget": {
"browser/POLCToken-V1.4.sol": "POLCToken"
},
"evmVersion": "istanbul",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs"
},
"optimizer": {
"enabled": true,
"runs": 200
},
"remappings": []
}
[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_owner","type":"address"},{"indexed":true,"internalType":"address","name":"_spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"_value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Burn","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"oldOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnerSet","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_from","type":"address"},{"indexed":true,"internalType":"address","name":"_to","type":"address"},{"indexed":false,"internalType":"uint256","name":"_value","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[],"name":"CROWDSALE_END","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"CROWDSALE_START","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"CSALE_HARDCAP","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"CSALE_WEI_FACTOR","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_owner","type":"address"},{"internalType":"address","name":"_spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"remaining","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"allowed","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_spender","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"success","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_spender","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"},{"internalType":"bytes","name":"_extraData","type":"bytes"}],"name":"approveAndCall","outputs":[{"internalType":"bool","name":"success","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_owner","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"balance","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"balances","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"burn","outputs":[{"internalType":"bool","name":"success","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"burnUnsold","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"buy","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"changeOwner","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"contractsWhiteList","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"disableTXLimit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"enableTXLimit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_wallet","type":"address"}],"name":"getLockedBalance","outputs":[{"internalType":"uint256","name":"lockedBalance","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getOwner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_contractAddress","type":"address"}],"name":"includeWhiteList","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"lastTXBlock","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"limitTransactions","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_account","type":"address"}],"name":"releaseTokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_contractAddress","type":"address"}],"name":"removeWhiteList","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"salesWallet","outputs":[{"internalType":"address payable","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"soldOnCSale","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"timeLocks","outputs":[{"internalType":"uint256","name":"totalAmount","type":"uint256"},{"internalType":"uint256","name":"lockedBalance","type":"uint256"},{"internalType":"uint128","name":"baseDate","type":"uint128"},{"internalType":"uint64","name":"step","type":"uint64"},{"internalType":"uint64","name":"tokensStep","type":"uint64"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"supply","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"success","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_from","type":"address"},{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"success","type":"bool"}],"stateMutability":"nonpayable","type":"function"}]