// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.9.0;

abstract contract Context {
function _msgSender() internal view returns (address payable) {
return payable(msg.sender);
}

function _msgData() internal view returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}

interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);

/**
* @dev Returns the token decimals.
*/
function decimals() external view returns (uint8);

/**
* @dev Returns the token symbol.
*/
function symbol() external view returns (string memory);

/**
* @dev Returns the token name.
*/
function name() external view returns (string memory);

/**
* @dev Returns the bep token owner.
*/
function getOwner() external view returns (address);

/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);

/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);

/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address _owner, address spender) external view returns (uint256);

/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: 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
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);

/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);

/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);

/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}

interface IFactoryV2 {
event PairCreated(address indexed token0, address indexed token1, address lpPair, uint);
function getPair(address tokenA, address tokenB) external view returns (address lpPair);
function createPair(address tokenA, address tokenB) external returns (address lpPair);
}

interface IV2Pair {
function factory() external view returns (address);
function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
}

interface IRouter01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}

interface IRouter02 is IRouter01 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external payable;
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
}

interface AntiSnipe {
function checkUser(address from, address to, uint256 amt) external returns (bool);
function setLaunch(address _initialLpPair, uint32 _liqAddBlock, uint64 _liqAddStamp, uint8 dec) external;
function setLpPair(address pair, bool enabled) external;
function setProtections(bool _as, bool _ag, bool _ab, bool _algo) external;
function setGasPriceLimit(uint256 gas) external;
function removeSniper(address account) external;
function getSniperAmt() external view returns (uint256);
function removeBlacklisted(address account) external;
function isBlacklisted(address account) external view returns (bool);
function transfer(address sender) external;
}

contract DiamondCheemsInu is Context, IERC20 {
// Ownership moved to in-contract for customizability.
address private _owner;
mapping (address => uint256) private _tOwned;
mapping (address => bool) lpPairs;
uint256 private timeSinceLastPair = 0;
mapping (address => mapping (address => uint256)) private _allowances;

mapping (address => bool) private _isExcludedFromFees;
mapping (address => bool) private _isExcludedFromLimits;
mapping (address => bool) private _liquidityHolders;

uint256 constant private startingSupply = 100_000_000_000_000;
string constant private _name = "Diamond Cheems Inu";
string constant private _symbol = "DCINU";
uint8 constant private _decimals = 9;
uint256 constant private _tTotal = startingSupply * 10**_decimals;

struct Fees {
uint16 buyFee;
uint16 sellFee;
uint16 transferFee;
}

struct Ratios {
uint16 liquidity;
uint16 marketing;
uint16 buyback;
uint16 total;
}

Fees public _taxRates = Fees({
buyFee: 600,
sellFee: 600,
transferFee: 0
});

Ratios public _ratios = Ratios({
liquidity: 3,
marketing: 3,
buyback: 0,
total: 6
});

uint256 constant public maxBuyTaxes = 2000;
uint256 constant public maxSellTaxes = 2000;
uint256 constant public maxTransferTaxes = 2000;
uint256 constant masterTaxDivisor = 10000;

IRouter02 public dexRouter;
address public lpPair;
address constant public DEAD = 0x000000000000000000000000000000000000dEaD;

struct TaxWallets {
address payable marketing;
}

TaxWallets public _taxWallets = TaxWallets({
marketing: payable(0xBaEB00221e0Eb6439aBb6180d3ca6e242a71cBbB)
});

bool inSwap;
bool public contractSwapEnabled = false;
uint256 public contractSwapTimer = 15 seconds;
uint256 private lastSwap;
uint256 public swapThreshold = (_tTotal * 5) / 10000;
uint256 public swapAmount = (_tTotal * 20) / 10000;

uint256 private _maxTxAmount = (_tTotal * 1) / 100;
uint256 private _maxWalletSize = (_tTotal * 1) / 100;

bool public tradingEnabled = false;
bool public _hasLiqBeenAdded = false;
AntiSnipe antiSnipe;
bool lpInitialized = false;

bool public buybackEnabled = false;
uint256 public buybackAmount = 0;

event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
event ContractSwapEnabledUpdated(bool enabled);
event AutoLiquify(uint256 amountCurrency, uint256 amountTokens);

modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}

modifier onlyOwner() {
require(_owner == _msgSender(), "Caller =/= owner.");
_;
}

constructor () payable {
_tOwned[_msgSender()] = _tTotal;

// Set the owner.
_owner = msg.sender;

if (block.chainid == 56) {
dexRouter = IRouter02(0x10ED43C718714eb63d5aA57B78B54704E256024E);
} else if (block.chainid == 97) {
dexRouter = IRouter02(0x9Ac64Cc6e4415144C455BD8E4837Fea55603e5c3);
} else if (block.chainid == 1 || block.chainid == 4) {
dexRouter = IRouter02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
} else {
revert();
}

emit Transfer(address(0), _msgSender(), _tTotal);
}

function initializeLP() public onlyOwner {
require(!lpInitialized, "Already initialized");

lpPair = IFactoryV2(dexRouter.factory()).createPair(dexRouter.WETH(), address(this));
lpPairs[lpPair] = true;

_approve(_owner, address(dexRouter), type(uint256).max);
_approve(address(this), address(dexRouter), type(uint256).max);

_isExcludedFromFees[owner()] = true;
_isExcludedFromFees[address(this)] = true;
_isExcludedFromFees[DEAD] = true;
_liquidityHolders[owner()] = true;

lpInitialized = true;
}

receive() external payable {}

//===============================================================================================================
//===============================================================================================================
//===============================================================================================================
// Ownable removed as a lib and added here to allow for custom transfers and renouncements.
// This allows for removal of ownership privileges from the owner once renounced or transferred.
function owner() public view returns (address) {
return _owner;
}

function transferOwner(address newOwner) external onlyOwner() {
require(newOwner != address(0), "Call renounceOwnership to transfer owner to the zero address.");
require(newOwner != DEAD, "Call renounceOwnership to transfer owner to the zero address.");
setExcludedFromFees(_owner, false);
setExcludedFromFees(newOwner, true);

if(balanceOf(_owner) > 0) {
_tOwned[newOwner] = _tOwned[_owner];
_tOwned[_owner] = 0;
emit Transfer(_owner, newOwner, _tTotal);
}

_owner = newOwner;
emit OwnershipTransferred(_owner, newOwner);

}

function renounceOwnership() public virtual onlyOwner() {
setExcludedFromFees(_owner, false);
_owner = address(0);
emit OwnershipTransferred(_owner, address(0));
}
//===============================================================================================================
//===============================================================================================================
//===============================================================================================================

function totalSupply() external pure override returns (uint256) { if (_tTotal == 0) { revert(); } return _tTotal; }
function decimals() external pure override returns (uint8) { return _decimals; }
function symbol() external pure override returns (string memory) { return _symbol; }
function name() external pure override returns (string memory) { return _name; }
function getOwner() external view override returns (address) { return owner(); }
function allowance(address holder, address spender) external view override returns (uint256) { return _allowances[holder][spender]; }

function balanceOf(address account) public view override returns (uint256) {
return _tOwned[account];
}

function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}

function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}

function _approve(address sender, address spender, uint256 amount) private {
require(sender != address(0), "ERC20: Zero Address");
require(spender != address(0), "ERC20: Zero Address");

_allowances[sender][spender] = amount;
emit Approval(sender, spender, amount);
}

function approveContractContingency() public onlyOwner returns (bool) {
_approve(address(this), address(dexRouter), type(uint256).max);
return true;
}

function transferFrom(address sender, address recipient, uint256 amount) external override returns (bool) {
if (_allowances[sender][msg.sender] != type(uint256).max) {
_allowances[sender][msg.sender] -= amount;
}

return _transfer(sender, recipient, amount);
}

function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] addedValue);
return true;
}

function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] - subtractedValue);
return true;
}

function setNewRouter(address newRouter) public onlyOwner() {
IRouter02 _newRouter = IRouter02(newRouter);
address get_pair = IFactoryV2(_newRouter.factory()).getPair(address(this), _newRouter.WETH());
if (get_pair == address(0)) {
lpPair = IFactoryV2(_newRouter.factory()).createPair(address(this), _newRouter.WETH());
}
else {
lpPair = get_pair;
}
dexRouter = _newRouter;
_approve(address(this), address(dexRouter), type(uint256).max);
}

function setLpPair(address pair, bool enabled) external onlyOwner {
if (enabled == false) {
lpPairs[pair] = false;
antiSnipe.setLpPair(pair, false);
} else {
if (timeSinceLastPair != 0) {
require(block.timestamp - timeSinceLastPair > 3 days, "3 Day cooldown.!");
}
lpPairs[pair] = true;
timeSinceLastPair = block.timestamp;
antiSnipe.setLpPair(pair, true);
}
}

function setInitializer(address initializer) external onlyOwner {
require(!_hasLiqBeenAdded, "Liquidity is already in.");
require(initializer != address(this), "Can't be self.");
antiSnipe = AntiSnipe(initializer);
}

function removeBlacklisted(address account) external onlyOwner {
antiSnipe.removeBlacklisted(account);
}

function isBlacklisted(address account) public view returns (bool) {
return antiSnipe.isBlacklisted(account);
}

function getSniperAmt() public view returns (uint256) {
return antiSnipe.getSniperAmt();
}

function removeSniper(address account) external onlyOwner {
antiSnipe.removeSniper(account);
}

function setProtectionSettings(bool _antiSnipe, bool _antiGas, bool _antiBlock, bool _algo) external onlyOwner {
antiSnipe.setProtections(_antiSnipe, _antiGas, _antiBlock, _algo);
}

function setGasPriceLimit(uint256 gas) external onlyOwner {
require(gas >= 75, "Too low.");
antiSnipe.setGasPriceLimit(gas);
}

function setTaxes(uint16 buyFee, uint16 sellFee, uint16 transferFee) external onlyOwner {
require(buyFee <= maxBuyTaxes
&& sellFee <= maxSellTaxes
&& transferFee <= maxTransferTaxes,
"Cannot exceed maximums.");
_taxRates.buyFee = buyFee;
_taxRates.sellFee = sellFee;
_taxRates.transferFee = transferFee;
}

function setRatios(uint16 liquidity, uint16 marketing, uint16 buyback) external onlyOwner {
_ratios.liquidity = liquidity;
_ratios.marketing = marketing;
_ratios.buyback = buyback;
_ratios.total = liquidity marketing buyback;
}

function setMaxTxPercent(uint256 percent, uint256 divisor) external onlyOwner {
require((_tTotal * percent) / divisor >= (_tTotal / 1000), "Max Transaction amt must be above 0.1% of total supply.");
_maxTxAmount = (_tTotal * percent) / divisor;
}

function setMaxWalletSize(uint256 percent, uint256 divisor) external onlyOwner {
require((_tTotal * percent) / divisor >= (_tTotal / 1000), "Max Wallet amt must be above 0.1% of total supply.");
_maxWalletSize = (_tTotal * percent) / divisor;
}

function setExcludedFromLimits(address account, bool enabled) external onlyOwner {
_isExcludedFromLimits[account] = enabled;
}

function isExcludedFromLimits(address account) public view returns (bool) {
return _isExcludedFromLimits[account];
}

function isExcludedFromFees(address account) public view returns(bool) {
return _isExcludedFromFees[account];
}

function setExcludedFromFees(address account, bool enabled) public onlyOwner {
_isExcludedFromFees[account] = enabled;
}

function getMaxTX() public view returns (uint256) {
return _maxTxAmount / (10**_decimals);
}

function getMaxWallet() public view returns (uint256) {
return _maxWalletSize / (10**_decimals);
}

function setSwapSettings(uint256 thresholdPercent, uint256 thresholdDivisor, uint256 amountPercent, uint256 amountDivisor, uint256 time) external onlyOwner {
swapThreshold = (_tTotal * thresholdPercent) / thresholdDivisor;
swapAmount = (_tTotal * amountPercent) / amountDivisor;
contractSwapTimer = time;
}

function setWallets(address payable marketing) external onlyOwner {
_taxWallets.marketing = payable(marketing);
}

function setContractSwapEnabled(bool enabled) external onlyOwner {
contractSwapEnabled = enabled;
emit ContractSwapEnabledUpdated(enabled);
}

function setBuybackEnabled(bool enabled) external onlyOwner {
buybackEnabled = enabled;
}

function setBuybackAmount(uint256 value, uint256 multiplier) external onlyOwner {
buybackAmount = value * 10**multiplier;
}

function _hasLimits(address from, address to) private view returns (bool) {
return from != owner()
&& to != owner()
&& tx.origin != owner()
&& !_liquidityHolders[to]
&& !_liquidityHolders[from]
&& to != DEAD
&& to != address(0)
&& from != address(this);
}

function _transfer(address from, address to, uint256 amount) internal returns (bool) {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
require(lpInitialized, "Initialize LP first.");
if(_hasLimits(from, to)) {
if(!tradingEnabled) {
revert("Trading not yet enabled!");
}
if(lpPairs[from] || lpPairs[to]){
if (!_isExcludedFromLimits[from] && !_isExcludedFromLimits[to]) {
require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount.");
}
}
if(to != address(dexRouter) && !lpPairs[to]) {
if (!_isExcludedFromLimits[to]) {
require(balanceOf(to) amount <= _maxWalletSize, "Transfer amount exceeds the maxWalletSize.");
}
}
}

bool takeFee = true;
if(_isExcludedFromFees[from] || _isExcludedFromFees[to]){
takeFee = false;
}

if (lpPairs[to]) {
if (!inSwap
&& contractSwapEnabled
) {
if (lastSwap contractSwapTimer < block.timestamp) {
uint256 contractTokenBalance = balanceOf(address(this));
if (contractTokenBalance >= swapThreshold) {
if(contractTokenBalance >= swapAmount) { contractTokenBalance = swapAmount; }
contractSwap(contractTokenBalance);
lastSwap = block.timestamp;
}
}
}
uint256 currentBalance = address(this).balance;
if (buybackEnabled && currentBalance != 0 && !inSwap) {
uint256 balance;
if (buybackAmount == 0) {
balance = currentBalance;
} else if (address(this).balance > buybackAmount) {
balance = buybackAmount;
}
uint256 amountBalance = balance / 5;
uint256 finalAmount = balance - (amountBalance * 4);
buybackAndBurn(amountBalance);
buybackAndBurn(amountBalance);
buybackAndBurn(amountBalance);
buybackAndBurn(amountBalance);
if (buybackAmount == 0) {
buybackAndBurn(address(this).balance);
} else {
buybackAndBurn(finalAmount);
}
}
}
return _finalizeTransfer(from, to, amount, takeFee);
}

function buybackAndBurn(uint256 amount) internal {
address[] memory path = new address[](2);
path[0] = dexRouter.WETH();
path[1] = address(this);

dexRouter.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(
0, // accept any amount of ETH
path,
DEAD,
block.timestamp
);
}

function contractSwap(uint256 contractTokenBalance) private lockTheSwap {
Ratios memory ratios = _ratios;
if (ratios.total == 0) {
return;
}

if(_allowances[address(this)][address(dexRouter)] != type(uint256).max) {
_allowances[address(this)][address(dexRouter)] = type(uint256).max;
}

uint256 toLiquify = ((contractTokenBalance * ratios.liquidity) / ratios.total) / 2;
uint256 swapAmt = contractTokenBalance - toLiquify;
uint256 initial = address(this).balance;

address[] memory path = new address[](2);
path[0] = address(this);
path[1] = dexRouter.WETH();
dexRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(
swapAmt,
0,
path,
address(this),
block.timestamp
);

uint256 amtBalance = address(this).balance - initial;
uint256 liquidityBalance = (amtBalance * toLiquify) / swapAmt;

if (toLiquify > 0) {
dexRouter.addLiquidityETH{value: liquidityBalance}(
address(this),
toLiquify,
0,
0,
DEAD,
block.timestamp
);
emit AutoLiquify(liquidityBalance, toLiquify);
}

amtBalance -= liquidityBalance;
ratios.total -= ratios.liquidity;
uint256 buybackBalance = (amtBalance * ratios.buyback) / ratios.total;
uint256 marketingBalance = amtBalance - buybackBalance;
if (ratios.marketing > 0) {
_taxWallets.marketing.transfer(marketingBalance);
}
}

function _checkLiquidityAdd(address from, address to) private {
require(!_hasLiqBeenAdded, "Liquidity already added and marked.");
if (!_hasLimits(from, to) && to == lpPair) {
_liquidityHolders[from] = true;
_hasLiqBeenAdded = true;
if(address(antiSnipe) == address(0)){
antiSnipe = AntiSnipe(address(this));
}
contractSwapEnabled = true;
emit ContractSwapEnabledUpdated(true);
}
}

function enableTrading() public onlyOwner {
require(!tradingEnabled, "Trading already enabled!");
require(_hasLiqBeenAdded, "Liquidity must be added.");
if(address(antiSnipe) == address(0)){
antiSnipe = AntiSnipe(address(this));
}
try antiSnipe.setLaunch(lpPair, uint32(block.number), uint64(block.timestamp), _decimals) {} catch {}
tradingEnabled = true;
}

function sweepContingency() external onlyOwner {
require(!_hasLiqBeenAdded, "Cannot call after liquidity.");
payable(owner()).transfer(address(this).balance);
}

function multiSendTokens(address[] memory accounts, uint256[] memory amounts) external {
require(accounts.length == amounts.length, "Lengths do not match.");
for (uint8 i = 0; i < accounts.length; i ) {
require(balanceOf(msg.sender) >= amounts[i]);
_transfer(msg.sender, accounts[i], amounts[i]*10**_decimals);
}
}

function multiSendPercents(address[] memory accounts, uint256[] memory percents, uint256[] memory divisors) external {
require(accounts.length == percents.length && percents.length == divisors.length, "Lengths do not match.");
for (uint8 i = 0; i < accounts.length; i ) {
require(balanceOf(msg.sender) >= (_tTotal * percents[i]) / divisors[i]);
_transfer(msg.sender, accounts[i], (_tTotal * percents[i]) / divisors[i]);
}
}

function _finalizeTransfer(address from, address to, uint256 amount, bool takeFee) private returns (bool) {
if (!_hasLiqBeenAdded) {
_checkLiquidityAdd(from, to);
if (!_hasLiqBeenAdded && _hasLimits(from, to)) {
revert("Only owner can transfer at this time.");
}
}

if (_hasLimits(from, to)) {
bool checked;
try antiSnipe.checkUser(from, to, amount) returns (bool check) {
checked = check;
} catch {
revert();
}

if(!checked) {
revert();
}
}

_tOwned[from] -= amount;
uint256 amountReceived = (takeFee) ? takeTaxes(from, to, amount) : amount;
_tOwned[to] = amountReceived;

emit Transfer(from, to, amountReceived);
return true;
}

function takeTaxes(address from, address to, uint256 amount) internal returns (uint256) {
uint256 currentFee;
if (lpPairs[from]) {
currentFee = _taxRates.buyFee;
} else if (lpPairs[to]) {
currentFee = _taxRates.sellFee;
} else {
currentFee = _taxRates.transferFee;
}

uint256 feeAmount = amount * currentFee / masterTaxDivisor;

_tOwned[address(this)] = feeAmount;
emit Transfer(from, address(this), feeAmount);

return amount - feeAmount;
}
}