Contract Source Code:
File 1 of 1 : KEKToken
pragma solidity ^0.6.0;
// SPDX-License-Identifier: UNLICENSED
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
abstract contract ERC20Interface {
function totalSupply() public virtual view returns (uint);
function balanceOf(address tokenOwner) public virtual view returns (uint256 balance);
function allowance(address tokenOwner, address spender) public virtual view returns (uint256 remaining);
function transfer(address to, uint256 tokens) public virtual returns (bool success);
function approve(address spender, uint256 tokens) public virtual returns (bool success);
function transferFrom(address from, address to, uint256 tokens) public virtual returns (bool success);
event Transfer(address indexed from, address indexed to, uint256 tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint256 tokens);
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address payable public owner;
event OwnershipTransferred(address indexed _from, address indexed _to);
constructor() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address payable _newOwner) public onlyOwner {
owner = _newOwner;
emit OwnershipTransferred(msg.sender, _newOwner);
}
}
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*
*/
library SafeMath {
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;
}
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;
}
function ceil(uint a, uint m) internal pure returns (uint r) {
return (a + m - 1) / m * m;
}
}
// ----------------------------------------------------------------------------
// 'KEK' token contract
// Symbol : KEK
// Name : KEK
// Total supply: 70,000,000 (70 million)
// Decimals : 18
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract KEKToken is ERC20Interface, Owned {
using SafeMath for uint256;
string public symbol = "KEK";
string public name = "KEK";
uint256 public decimals = 18;
uint256 _totalSupply = 7e7 * 10 ** decimals;
uint256 private stakingRewards = 0;
mapping(address => uint256) balances;
mapping(address => mapping(address => uint256)) allowed;
mapping(address => bool) allowedPools;
modifier onlyPools(address _caller){
require(allowedPools[_caller], "UnAuthorized");
_;
}
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
constructor(address team, address payable presale, address production, address airdropRewards) public {
owner = presale;
balances[address(this)] = totalSupply();
emit Transfer(address(0),address(this), totalSupply());
balances[address(this)] = balances[address(this)].sub(3500000 * 10 ** decimals);
balances[presale] = balances[presale].add(3500000 * 10 ** decimals);
emit Transfer(address(this), presale, 3500000 * 10 ** decimals);
balances[address(this)] = balances[address(this)].sub(7000000 * 10 ** decimals);
balances[team] = balances[team].add(7000000 * 10 ** decimals);
emit Transfer(address(this), team, 7000000 * 10 ** decimals);
balances[address(this)] = balances[address(this)].sub(7000000 * 10 ** decimals);
balances[production] = balances[production].add(7000000 * 10 ** decimals);
emit Transfer(address(this), production, 7000000 * 10 ** decimals);
balances[address(this)] = balances[address(this)].sub(3500000 * 10 ** decimals);
balances[airdropRewards] = balances[airdropRewards].add(3500000 * 10 ** decimals);
emit Transfer(address(this), airdropRewards, 3500000 * 10 ** decimals);
stakingRewards = 49000000 * 10 ** decimals; // keep rest of all stakingRewards inside the contract
}
function claimRewards(uint256 rewards, address rewardedTo) public onlyPools(msg.sender) returns(bool){
// check the address should not be 0
require(address(rewardedTo) != address(0), "Reward taker shall not be address 0");
require(stakingRewards > 0, "Insufficient rewards available in KEK");
if(stakingRewards < rewards)
rewards = stakingRewards;
balances[address(this)] = balances[address(this)].sub(rewards);
balances[rewardedTo] = balances[rewardedTo].add(rewards);
emit Transfer(address(this),rewardedTo,rewards);
stakingRewards = stakingRewards.sub(rewards);
return true;
}
function configureAllowedPools(address poolAddress) external onlyOwner{
require(poolAddress != address(0), "Invalid pool address");
allowedPools[poolAddress] = true;
}
function removePools(address poolAddress) external onlyOwner{
require(poolAddress != address(0), "Invalid pool address");
allowedPools[poolAddress] = false;
}
function stakingRewardsAvailable() public view returns(uint256 _rewardsAvailable){
return stakingRewards;
}
function getTokensInEmergency(uint256 tokens) public onlyOwner{
balances[address(this)] = balances[address(this)].sub(tokens);
balances[owner] = balances[owner].add(tokens);
emit Transfer(address(this),owner,tokens);
}
/** ERC20Interface function's implementation **/
function totalSupply() public override view returns (uint256){
return _totalSupply;
}
// ------------------------------------------------------------------------
// Get the token balance for account `tokenOwner`
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public override view returns (uint256 balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to `to` account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint256 tokens) public override returns (bool success) {
// prevent transfer to 0x0, use burn instead
require(address(to) != address(0));
require(balances[msg.sender] >= tokens);
require(balances[to] + tokens >= balances[to]);
balances[msg.sender] = balances[msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
emit Transfer(msg.sender,to,tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for `spender` to transferFrom(...) `tokens`
// from the token owner's account
// ------------------------------------------------------------------------
function approve(address spender, uint256 tokens) public override returns (bool success){
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender,spender,tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer `tokens` from the `from` account to the `to` account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the `from` account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint256 tokens) public override returns (bool success){
require(tokens <= allowed[from][msg.sender]); //check allowance
require(balances[from] >= tokens);
require(balances[to] + tokens >= balances[to]);
balances[from] = balances[from].sub(tokens);
balances[to] = balances[to].add(tokens);
allowed[from][msg.sender] = allowed[from][msg.sender].sub(tokens);
emit Transfer(from,to,tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public override view returns (uint256 remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// @dev Public function that burns an amount of the token from a given account
// @param _amount The amount that will be burnt
// @param _account The tokens to burn from
// can be used from account owner
// ------------------------------------------------------------------------
function burnTokens(uint256 _amount, address _account) public {
require(msg.sender == _account, "UnAuthorized");
require(balances[_account] >= _amount, "Insufficient account balance");
_totalSupply = _totalSupply.sub(_amount);
balances[_account] = balances[_account].sub(_amount);
emit Transfer(_account, address(0), _amount);
}
}