all files / contracts/ UltimateERC20.sol

89.13% Statements 205/230
62.64% Branches 109/174
90.63% Functions 58/64
89.93% Lines 268/298
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790                                                                                                                                                                                                                  298×         298×         298×         87× 87× 87×   87× 87× 87×   87×   87×   87× 87×   87×   87× 87×     87× 87×     87× 87× 87× 87× 87× 87×       87× 87×     87× 87×   87×                               89× 89×                                       657× 316×       84× 84×               14× 14×       214× 213× 213×                                                                         326× 326× 326×       16× 16× 10×   16× 16× 16×                                               163×               163×       27× 27× 27×     27×         27×           27× 27× 27×     27×         27×           29× 29× 29×     29× 22× 22×     29×           30× 30× 30×     30× 22× 22×     30×           28×     28×         28×                                                                             297× 297×       297× 297× 297× 297×       297× 297×               297× 297×       297× 297× 297× 297× 297×       715× 715×       715× 715× 715× 78× 78× 78×   715× 715×       1485× 211×           194× 194×       194×                         231× 231×   231× 231×             104× 70×   14×                       298× 298× 298×     298×     298× 194×     298×   298× 104×         298×                                                                                                 298× 298×   298× 194×   104× 70×   70×     104×     297×   16×   275×           297× 194×   103×               275× 275× 275× 275× 275× 275×       16× 16× 16× 16× 16× 16× 16×             297×   297× 297×                   297× 297× 297×           297×       891× 891×   92× 92× 92× 92× 92×   92×       297× 30×   30×            
// SPDX-License-Identifier: NOLICENSE
 
pragma solidity ^0.8.9;
 
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
 
import "@uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router02.sol";
import "@uniswap/v2-core/contracts/interfaces/IUniswapV2Factory.sol";
import "@uniswap/v2-core/contracts/interfaces/IUniswapV2Pair.sol";
 
import "./TimeLockTransactions.sol";
import "./WithdrawableOwnable.sol";
import "./AntiDumpOwnable.sol";
 
contract UltimateERC20 is IERC20, Ownable, TimeLockTransactions, WithdrawableOwnable, AntiDumpOwnable {
    using SafeMath for uint256;
    using Address for address;
 
    struct FeeTier {
        uint256 ecoSystemFee;
        address ecoSystem;
        uint256 stakingFee;
        address staking; // wallet para dividendos para detentores de HRS
        uint256 liquidityFee; // fee to add funds to the DEX
        uint256 taxFee;
        uint256 burnFee;
    }
 
    struct FeeValues {
        uint256 rAmount;
        uint256 rTransferAmount;
        uint256 rFee;
        uint256 tTransferAmount;
        uint256 tEcoSystem;
        uint256 tStaking;
        uint256 tLiquidity;
        uint256 tFee;
        uint256 tBurn;
    }
 
    struct tFeeValues {
        uint256 tTransferAmount;
        uint256 tEcoSystem;
        uint256 tStaking;
        uint256 tLiquidity;
        uint256 tFee;
        uint256 tBurn;
    }
 
    mapping (address => uint256) private _rOwned;
    mapping (address => uint256) private _tOwned;
    mapping (address => mapping (address => uint256)) private _allowances;
    mapping (address => bool) private _isExcludedFromFee;
    mapping (address => bool) private _isExcludedFromReward;
 
    // todo: improve this. we are iterating over this. and this might be costly
    address[] private _excluded;
 
    uint256 private constant MAX = type(uint256).max;
    uint256 private _tTotal;
    uint256 private _rTotal;
    // @dev total reflect fee collected
    uint256 private _tFeeTotal;
    uint256 private _maxFee;
 
    string private _name;
    string private _symbol;
    uint8 private _decimals;
 
    FeeTier public _defaultFees;
    FeeTier private _previousFees;
    FeeTier private _emptyFees;
 
    IUniswapV2Router02 public uniswapV2Router;
    address public uniswapFactoryAddress;
    mapping(address => bool) public automatedMarketMakerPairs;
    address public defaultPair;
 
    address public _burnAddress;
 
    // @dev which wallet will receive the ecosystem fee. If dead is used, it goes to the msgSender
    address public liquidityAddress;
 
    bool inSwapAndLiquify;
    bool public swapAndLiquifyEnabled;
 
    uint256 public numTokensSellToAddToLiquidity;
 
    event MinTokensBeforeSwapUpdated(uint256 minTokensBeforeSwap);
    event SwapAndLiquifyEnabledUpdated(bool enabled);
    event SwapAndLiquify(
        uint256 tokensSwapped,
        uint256 bnbReceived,
        uint256 tokensIntoLiquidity
    );
 
    // @dev just a protection
    modifier lockTheSwap {
        inSwapAndLiquify = true;
        _;
        inSwapAndLiquify = false;
    }
 
    modifier _checkIfPairIsAuthorized(address from, address to) {
        // if the contract has symbol and the name is Cake-LP, it is a pancake pair
        if(Address.isContract(from) && !automatedMarketMakerPairs[from]) {
            try IUniswapV2Pair(from).symbol() returns (string memory _value) {
                Iif(compareStrings(_value, "Cake-LP"))
                    revert("pair not allowed");
            }
            catch {}
        }
        if(Address.isContract(to) && !automatedMarketMakerPairs[to]) {
            try IUniswapV2Pair(to).symbol() returns (string memory _value) {
                Iif(compareStrings(_value, "Cake-LP"))
                    revert("pair not allowed");
            }
            catch {}
        }
        _;
    }
 
    // @dev the constructor
    constructor (string memory __name, string memory __symbol) AntiDumpOwnable(9) {
        _name = __name;
        _symbol = __symbol;
        _decimals = 9;
 
        _tTotal = 1000000000 * 10**_decimals;
        _rTotal = (MAX - (MAX % _tTotal));
        _maxFee = 2 * 10**8; // 20%
 
        swapAndLiquifyEnabled = false;
 
        numTokensSellToAddToLiquidity = _tTotal.div(10**6); // 0.000001% of total supply
 
        _burnAddress = 0x000000000000000000000000000000000000dEaD;
        liquidityAddress = _burnAddress;
 
        _rOwned[_msgSender()] = _rTotal;
 
        uniswapV2Router = IUniswapV2Router02(0x10ED43C718714eb63d5aA57B78B54704E256024E); // bsc mainnet router
        uniswapFactoryAddress = 0xcA143Ce32Fe78f1f7019d7d551a6402fC5350c73; // pancakeswap factory address
 
        // Create a uniswap pair for this new token
        defaultPair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(address(this), uniswapV2Router.WETH());
        _setAutomatedMarketMakerPair(defaultPair, true);
 
        //exclude owner and this contract from fee
        _isExcludedFromFee[owner()] = true;
        _isExcludedFromFee[address(this)] = true;
        _isExcludedFromFee[_burnAddress] = true;
        emit ExcludeFromFee(owner());
        emit ExcludeFromFee(address(this));
        emit ExcludeFromFee(_burnAddress);
 
//        // todo: check if this is really necessary
//        _isExcludedFromReward[owner()] = true;
        _isExcludedFromReward[address(this)] = true;
        _isExcludedFromReward[_burnAddress] = true;
        // set fees
        // 5*10**6 is 0,5% 5*10**7 is 5%
        _emptyFees = FeeTier({ecoSystemFee:0, stakingFee:0, liquidityFee:5*10**6, taxFee:5*10**6, burnFee:0, ecoSystem:address(this), staking:address(this)});
        _defaultFees = FeeTier({ecoSystemFee:125*10**5, stakingFee:125*10**5, liquidityFee:25*10**6, taxFee:5*10**7, burnFee:0, ecoSystem:address(this), staking:address(this)});
        
        emit Transfer(address(0), _msgSender(), _tTotal);
    }
 
    // @dev create and add a new pair for a given token
    function addNewPair(address tokenAddress) external EonlyOwner returns (address np) {
        address newPair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(address(this) ,tokenAddress);
        _setAutomatedMarketMakerPair(newPair, true);
        emit AddNewPair(tokenAddress, newPair);
        return newPair;
    }
    event AddNewPair(address indexed tokenAddress, address indexed newPair);
 
    function setNumTokensSellToAddToLiquidity(uint256 newLimit) external EonlyOwner {
        require(newLimit >= totalSupply().div(10**6), "new limit is too low");
        numTokensSellToAddToLiquidity = newLimit;
        emit SetNumTokensSellToAddToLiquidity(newLimit);
    }
    event SetNumTokensSellToAddToLiquidity(uint256 newLimit);
 
    function setAutomatedMarketMakerPair(address pair, bool value) public EonlyOwner {
        Erequire(pair != defaultPair, "cannot be removed");
        _setAutomatedMarketMakerPair(pair, value);
    }
 
    function _setAutomatedMarketMakerPair(address pair, bool value) private EonlyOwner {
        automatedMarketMakerPairs[pair] = value;
        emit SetAutomatedMarketMakerPair(pair, value);
    }
    event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);
 
    // @dev the default name of the contract
    function name() public view returns (string memory) {
        return _name;
    }
 
    // @dev the symbol of the contract
    function symbol() public view returns (string memory) {
        return _symbol;
    }
 
    // @dev the numbers of decimals the token have
    function decimals() public view returns (uint8) {
        return _decimals;
    }
 
    function totalSupply() public view override returns (uint256) {
        return _tTotal;
    }
 
    function balanceOf(address account) public view override returns (uint256) {
        if (_isExcludedFromReward[account]) return _tOwned[account];
        return tokenFromReflection(_rOwned[account]);
    }
 
    function transfer(address recipient, uint256 amount) public override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }
 
    function allowance(address owner, address spender) public view override returns (uint256) {
        return _allowances[owner][spender];
    }
 
    function approve(address spender, uint256 amount) public override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }
 
    function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "BEP20: transfer amount exceeds allowance"));
        return true;
    }
 
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
        return true;
    }
 
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "BEP20: decreased allowance below zero"));
        return true;
    }
 
    function isExcludedFromReward(address account) public view returns (bool) {
        return _isExcludedFromReward[account];
    }
 
    // @dev total fees collected in tax to be used in reflection(i guess)
    function totalFees() public view returns (uint256) {
        return _tFeeTotal;
    }
 
    // todo: is this even useful?
    function reflectionFromTokenInTiers(uint256 tAmount, bool _getDefaultFee, bool deductTransferFee) public view returns(uint256) {
        require(tAmount <= _tTotal, "Amount must be less than supply");
        if (!deductTransferFee) {
            FeeValues memory _values = _getValues(tAmount, _getDefaultFee);
            return _values.rAmount;
        } else {
            FeeValues memory _values = _getValues(tAmount, _getDefaultFee);
            return _values.rTransferAmount;
        }
    }
 
    function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) {
        return reflectionFromTokenInTiers(tAmount, true, deductTransferFee);
    }
 
    function tokenFromReflection(uint256 rAmount) public view returns(uint256) {
        Erequire(rAmount <= _rTotal, "Amount must be less than total reflections");
        uint256 currentRate = _getRate();
        return rAmount.div(currentRate);
    }
 
    function excludeFromReward(address account) public EonlyOwner() {
        Erequire(!_isExcludedFromReward[account], "Account is already excluded");
        if(_rOwned[account] > 0) {
            _tOwned[account] = tokenFromReflection(_rOwned[account]);
        }
        _isExcludedFromReward[account] = true;
        _excluded.push(account);
        emit ExcludeFromReward(account);
    }
    event ExcludeFromReward(address account);
 
    function includeInReward(address account) public EonlyOwner() {
        Erequire(_isExcludedFromReward[account], "Account is already included");
        for (uint256 i = 0; i < _excluded.length; i++) {
            Iif (_excluded[i] == account) {
                _excluded[i] = _excluded[_excluded.length - 1];
                _tOwned[account] = 0;
                _isExcludedFromReward[account] = false;
                _excluded.pop();
                break;
            }
        }
        emit IncludeInReward(account);
    }
    event IncludeInReward(address account);
 
    function excludeFromFee(address account) public EonlyOwner() {
        _isExcludedFromFee[account] = true;
        emit ExcludeFromFee(account);
    }
    event ExcludeFromFee(address account);
 
    function includeInFee(address account) public EonlyOwner() {
        _isExcludedFromFee[account] = false;
        emit IncludeInFee(account);
    }
    event IncludeInFee(address account);
 
    function checkFeesChanged(FeeTier memory _tier, uint256 _oldFee, uint256 _newFee) internal view {
        uint256 _fees = _tier.ecoSystemFee
        .add(_tier.stakingFee)
        .add(_tier.liquidityFee)
        .add(_tier.taxFee)
        .add(_tier.burnFee)
        .add(_newFee)
        .sub(_oldFee);
 
        Erequire(_fees <= _maxFee, "Fees exceeded max limitation");
    }
 
    function setEcoSystemFeePercent(uint256 _empty, uint256 _default) external EonlyOwner() {
        Eif(_default != _defaultFees.ecoSystemFee) {
            checkFeesChanged(_defaultFees, _defaultFees.ecoSystemFee, _default);
            _defaultFees.ecoSystemFee = _default;
        }
 
        Iif(_empty != _emptyFees.ecoSystemFee) {
            checkFeesChanged(_emptyFees, _emptyFees.ecoSystemFee, _empty);
            _emptyFees.ecoSystemFee = _empty;
        }
 
        emit SetEcoSystemFeePercent(_empty, _default);
    }
 
    event SetEcoSystemFeePercent(uint256 _empty, uint256 _default);
 
    function setStakingFeePercent(uint256 _empty, uint256 _default) external EonlyOwner() {
        Eif(_default != _defaultFees.stakingFee) {
            checkFeesChanged(_defaultFees, _defaultFees.stakingFee, _default);
            _defaultFees.stakingFee = _default;
        }
 
        Iif(_empty != _emptyFees.stakingFee) {
            checkFeesChanged(_emptyFees, _emptyFees.stakingFee, _empty);
            _emptyFees.stakingFee = _empty;
        }
 
        emit SetStakingFeePercent(_empty, _default);
    }
 
    event SetStakingFeePercent(uint256 _empty, uint256 _default);
 
    function setLiquidityFeePercent(uint256 _empty, uint256 _default) external EonlyOwner() {
        Eif(_default != _defaultFees.liquidityFee) {
            checkFeesChanged(_defaultFees, _defaultFees.liquidityFee, _default);
            _defaultFees.liquidityFee = _default;
        }
 
        if(_empty != _emptyFees.liquidityFee) {
            checkFeesChanged(_emptyFees, _emptyFees.liquidityFee, _empty);
            _emptyFees.liquidityFee = _empty;
        }
 
        emit SetLiquidityFeePercent(_empty, _default);
    }
 
    event SetLiquidityFeePercent(uint256 _empty, uint256 _default);
 
    function setTaxFeePercent(uint256 _empty, uint256 _default) external EonlyOwner() {
        Eif(_default != _defaultFees.taxFee) {
            checkFeesChanged(_defaultFees, _defaultFees.taxFee, _default);
            _defaultFees.taxFee = _default;
        }
 
        if(_empty != _emptyFees.taxFee) {
            checkFeesChanged(_emptyFees, _emptyFees.taxFee, _empty);
            _emptyFees.taxFee = _empty;
        }
 
        emit SetTaxFeePercent(_empty, _default);
    }
 
    event SetTaxFeePercent(uint256 _empty, uint256 _default);
 
    function setBurnFeePercent(uint256 _empty, uint256 _default) external EonlyOwner() {
        if(_default != _defaultFees.burnFee) {
            checkFeesChanged(_defaultFees, _defaultFees.burnFee, _default);
            _defaultFees.burnFee = _default;
        }
 
        Iif(_empty != _emptyFees.burnFee) {
            checkFeesChanged(_emptyFees, _emptyFees.burnFee, _empty);
            _emptyFees.burnFee = _empty;
        }
 
        emit SetBurnFeePercent(_empty, _default);
    }
 
    event SetBurnFeePercent(uint256 _empty, uint256 _default);
 
    function setEcoSystemFeeAddress(address _empty, address _default) external EonlyOwner() {
        Eif(_default != _defaultFees.ecoSystem) {
            Erequire(_default != address(0), "Address Zero is not allowed");
            includeInReward(_defaultFees.ecoSystem);
            _defaultFees.ecoSystem = _default;
            excludeFromReward(_default);
        }
        Eif(_empty != _emptyFees.ecoSystem) {
            Erequire(_empty != address(0), "Address Zero is not allowed");
            includeInReward(_emptyFees.ecoSystem);
            _emptyFees.ecoSystem = _empty;
            excludeFromReward(_empty);
        }
        emit SetEcoSystemFeeAddress(_empty, _default);
    }
 
    event SetEcoSystemFeeAddress(address _empty, address _default);
 
    function setStakingFeeAddress(address _empty, address _default) external EonlyOwner() {
        Eif(_default != _defaultFees.staking) {
            Erequire(_default != address(0), "Address Zero is not allowed");
            includeInReward(_defaultFees.staking);
            _defaultFees.staking = _default;
            excludeFromReward(_default);
        }
        Eif(_empty != _emptyFees.staking) {
            Erequire(_empty != address(0), "Address Zero is not allowed");
            includeInReward(_emptyFees.staking);
            _emptyFees.staking = _empty;
            excludeFromReward(_empty);
        }
        emit SetStakingFeeAddress(_empty, _default);
    }
 
    event SetStakingFeeAddress(address _empty, address _default);
 
    // @dev set liquidity address to receive fees, id dead, the lp token goes to the user
    function setLiqudityFeeAddress(address newAddress) public EonlyOwner {
        Erequire(liquidityAddress != newAddress, "Liquidity address already setted");
        Erequire(liquidityAddress != address(0), "Address Zero is not allowed");
        includeInReward(liquidityAddress);
        liquidityAddress = newAddress;
        excludeFromReward(newAddress);
        emit SetLiqudityFeeAddress(newAddress);
    }
 
    event SetLiqudityFeeAddress(address indexed liquidityAddress);
 
    function updateRouter(address _uniswapV2Router) public onlyOwner() {
        uniswapV2Router = IUniswapV2Router02(_uniswapV2Router);
        emit UpdateRouter(_uniswapV2Router);
    }
    event UpdateRouter(address _uniswapV2Router);
 
    // @dev enable the swap mechanisms. This can only be enabled. The owner cannot disable swap or lock the contract by any means.
    function enableSwapAndLiquify() external EonlyOwner() {
        swapAndLiquifyEnabled = true;
        emit SwapAndLiquifyEnabledUpdated(true);
    }
 
    //to receive BNB from uniswapV2Router when swapping
    receive() external payable {}
 
    function _reflectFee(uint256 rFee, uint256 tFee) private {
        _rTotal = _rTotal.sub(rFee);
        _tFeeTotal = _tFeeTotal.add(tFee);
    }
 
    function _getValues(uint256 tAmount, bool _getDefault) private view returns (FeeValues memory) {
        tFeeValues memory tValues = _getTValues(tAmount, _getDefault);
        uint256 tTransferFee = tValues.tLiquidity.add(tValues.tEcoSystem).add(tValues.tStaking).add(tValues.tBurn);
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tValues.tFee, tTransferFee, _getRate());
        return FeeValues(rAmount, rTransferAmount, rFee, tValues.tTransferAmount, tValues.tEcoSystem, tValues.tStaking, tValues.tLiquidity, tValues.tFee, tValues.tBurn);
    }
 
    function _getTValues(uint256 tAmount, bool _getDefault) private view returns (tFeeValues memory) {
        FeeTier memory tier = _getDefault ? _defaultFees : E_emptyFees;
        tFeeValues memory tValues = tFeeValues(
            0,
            calculateFee(tAmount, tier.ecoSystemFee),
            calculateFee(tAmount, tier.stakingFee),
            calculateFee(tAmount, tier.liquidityFee),
            calculateFee(tAmount, tier.taxFee),
            calculateFee(tAmount, tier.burnFee)
        );
        tValues.tTransferAmount = tAmount.sub(tValues.tEcoSystem).sub(tValues.tStaking).sub(tValues.tFee).sub(tValues.tLiquidity).sub(tValues.tBurn);
        return tValues;
    }
 
    function _getRValues(uint256 tAmount, uint256 tFee, uint256 tTransferFee, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
        uint256 rAmount = tAmount.mul(currentRate);
        uint256 rFee = tFee.mul(currentRate);
        uint256 rTransferFee = tTransferFee.mul(currentRate);
        uint256 rTransferAmount = rAmount.sub(rFee).sub(rTransferFee);
        return (rAmount, rTransferAmount, rFee);
    }
 
    function _getRate() private view returns(uint256) {
        (uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
        return rSupply.div(tSupply);
    }
 
    function _getCurrentSupply() private view returns(uint256, uint256) {
        uint256 rSupply = _rTotal;
        uint256 tSupply = _tTotal;
        for (uint256 i = 0; i < _excluded.length; i++) {
            Iif (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal);
            rSupply = rSupply.sub(_rOwned[_excluded[i]]);
            tSupply = tSupply.sub(_tOwned[_excluded[i]]);
        }
        Iif (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
        return (rSupply, tSupply);
    }
 
    function calculateFee(uint256 _amount, uint256 _fee) private pure returns (uint256) {
        if(_fee == 0) return 0;
        return _amount.mul(_fee).div(
            10**9
        );
    }
 
    function removeAllFee() private {
        _previousFees = _defaultFees;
        _defaultFees = _emptyFees;
    }
 
    function restoreAllFee() private {
        _defaultFees = _previousFees;
    }
 
    function isExcludedFromFee(address account) public view returns(bool) {
        return _isExcludedFromFee[account];
    }
 
    function _approve(
        address owner,
        address spender,
        uint256 amount
    )
    private
    {
        Erequire(owner != address(0), "BEP20: approve from the zero address");
        Erequire(spender != address(0), "BEP20: approve to the zero address");
 
        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }
 
    function compareStrings(string memory a, string memory b) public pure returns (bool) {
        return (keccak256(abi.encodePacked((a))) == keccak256(abi.encodePacked((b))));
    }
 
    function timeLockCheck(address from, address to) internal {
        if(automatedMarketMakerPairs[to])  // selling tokens
            lockIfCanOperateAndRevertIfNotAllowed(from);
        else if(automatedMarketMakerPairs[from]) // buying tokens
            lockIfCanOperateAndRevertIfNotAllowed(to);
    }
 
 
    function _transfer(
        address from,
        address to,
        uint256 amount
    )
    private
    E_checkIfPairIsAuthorized(from, to)
    {
        Erequire(from != address(0), "BEP20: transfer from the zero address");
        Erequire(to != address(0), "BEP20: transfer to the zero address");
        Erequire(amount > 0, "Transfer amount must be greater than zero");
 
        //indicates if fee should be deducted from transfer
        bool takeFee = true;
 
        //if any account belongs to _isExcludedFromFee account then remove the fee
        if(_isExcludedFromFee[from] || _isExcludedFromFee[to]){
            takeFee = false;
        }
 
        bool isDefaultFee = true;
 
        if(takeFee) {
            if(_msgSender() != from) isDefaultFee = !_isExcludedFromFee[_msgSender()];
            else isDefaultFee = !_isExcludedFromFee[from];
        }
 
        //transfer amount, it will take tax, burn, liquidity fee
        _tokenTransfer(from, to, amount, isDefaultFee, takeFee);
    }
 
    function swapAndLiquify(uint256 contractTokenBalance, address cakeReceiver) private ElockTheSwap {
        // split the contract balance into halves
        uint256 half = contractTokenBalance.div(2);
        uint256 otherHalf = contractTokenBalance.sub(half);
 
        // capture the contract's current BNB balance.
        // this is so that we can capture exactly the amount of BNB that the
        // swap creates, and not make the liquidity event include any BNB that
        // has been manually sent to the contract
        uint256 initialBalance = address(this).balance;
 
        // swap tokens for BNB
        swapTokensForBnb(half);
 
        // how much BNB did we just swap into?
        uint256 newBalance = address(this).balance.sub(initialBalance);
 
        // add liquidity to uniswap
        addLiquidity(otherHalf, newBalance, cakeReceiver);
 
        // todo: inspect if some tokens still remains in the contract caused by accumulation of small slippages when addLiquidity
 
        emit SwapAndLiquify(half, newBalance, otherHalf);
    }
 
    function swapTokensForBnb(uint256 tokenAmount) private {
        // generate the uniswap pair path of token -> wbnb
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = uniswapV2Router.WETH();
 
        _approve(address(this), address(uniswapV2Router), tokenAmount);
 
        // make the swap
        uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0, // accept any amount of BNB
            path,
            address(this),
            block.timestamp
        );
    }
 
    function addLiquidity(uint256 tokenAmount, uint256 bnbAmount, address cakeReceiver) private {
        // approve token transfer to cover all possible scenarios
        _approve(address(this), address(uniswapV2Router), tokenAmount);
 
        // add the liquidity
        uniswapV2Router.addLiquidityETH{ value: bnbAmount }(
            address(this),
            tokenAmount,
            0,
            0,
            cakeReceiver,
            block.timestamp.add(300)
        );
    }
 
    //this method is responsible for taking all fee, if takeFee is true
    function _tokenTransfer(address sender, address recipient, uint256 amount, bool _isDefaultFee, bool takeFee) private {
        FeeTier storage _feesWithAntiDump = _defaultFees;
        uint256 _previousTaxFee = _feesWithAntiDump.taxFee;
 
        if(!takeFee)
            removeAllFee();
        else { // check antidump 
            if(automatedMarketMakerPairs[recipient]) {
                uint256 extraFee = getAntiDumpFee(recipient, amount);
                // add antidump fee to reflection fee
                _feesWithAntiDump.taxFee = _feesWithAntiDump.taxFee.add(extraFee);
            } 
            // check authorized time window
            timeLockCheck(sender, recipient);
        }
 
        if (_isExcludedFromReward[sender] && !_isExcludedFromReward[recipient]) {
            _transferFromExcluded(sender, recipient, amount, _isDefaultFee);
        } else if (!_isExcludedFromReward[sender] && _isExcludedFromReward[recipient]) {
            _transferToExcluded(sender, recipient, amount, _isDefaultFee);
        } else if (!_isExcludedFromReward[sender] && !_isExcludedFromReward[recipient]) {
            _transferStandard(sender, recipient, amount, _isDefaultFee);
        } else Eif (_isExcludedFromReward[sender] && _isExcludedFromReward[recipient]) {
            _transferBothExcluded(sender, recipient, amount, _isDefaultFee);
        } else {
            _transferStandard(sender, recipient, amount, _isDefaultFee);
        }
 
        if(!takeFee)
            restoreAllFee();
        else {
            _feesWithAntiDump.taxFee = _previousTaxFee; // reset tax fee
        }
    }
 
    function _transferBothExcluded(address sender, address recipient, uint256 tAmount, bool _isDefaultFee) private {
        FeeValues memory _values = _getValues(tAmount, _isDefaultFee);
        _tOwned[sender] = _tOwned[sender].sub(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(_values.rAmount);
        _tOwned[recipient] = _tOwned[recipient].add(_values.tTransferAmount);
        _rOwned[recipient] = _rOwned[recipient].add(_values.rTransferAmount);
        _takeFees(sender, _values, _isDefaultFee);
        _reflectFee(_values.rFee, _values.tFee);
        emit Transfer(sender, recipient, _values.tTransferAmount);
    }
 
    function _transferStandard(address sender, address recipient, uint256 tAmount, bool _isDefaultFee) private {
        FeeValues memory _values = _getValues(tAmount, _isDefaultFee);
        _rOwned[sender] = _rOwned[sender].sub(_values.rAmount);
        _rOwned[recipient] = _rOwned[recipient].add(_values.rTransferAmount);
        _takeFees(sender, _values, _isDefaultFee);
        _reflectFee(_values.rFee, _values.tFee);
        emit Transfer(sender, recipient, _values.tTransferAmount);
    }
 
    function _transferToExcluded(address sender, address recipient, uint256 tAmount, bool _isDefaultFee) private {
        FeeValues memory _values = _getValues(tAmount, _isDefaultFee);
        _rOwned[sender] = _rOwned[sender].sub(_values.rAmount);
        _tOwned[recipient] = _tOwned[recipient].add(_values.tTransferAmount);
        _rOwned[recipient] = _rOwned[recipient].add(_values.rTransferAmount);
        _takeFees(sender, _values, _isDefaultFee);
        _reflectFee(_values.rFee, _values.tFee);
        emit Transfer(sender, recipient, _values.tTransferAmount);
    }
 
    function _transferFromExcluded(address sender, address recipient, uint256 tAmount, bool _isDefaultFee) private {
        FeeValues memory _values = _getValues(tAmount, _isDefaultFee);
        _tOwned[sender] = _tOwned[sender].sub(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(_values.rAmount);
        _rOwned[recipient] = _rOwned[recipient].add(_values.rTransferAmount);
        _takeFees(sender, _values, _isDefaultFee);
        _reflectFee(_values.rFee, _values.tFee);
        emit Transfer(sender, recipient, _values.tTransferAmount);
    }
 
    function _takeFees(address sender, FeeValues memory values, bool _isDefaultFee) private {
        _takeFee(sender, values.tLiquidity, address(this));
 
        bool overMinTokenBalance = balanceOf(address(this)) >= numTokensSellToAddToLiquidity;
        if (
            overMinTokenBalance &&
            !inSwapAndLiquify &&
            !automatedMarketMakerPairs[sender] &&
            swapAndLiquifyEnabled
        ) {
            //add liquidity
            if(liquidityAddress != _burnAddress) swapAndLiquify(balanceOf(address(this)), liquidityAddress);
            else if (values.tLiquidity > 0) swapAndLiquify(values.tLiquidity, sender);
        }
 
        Eif(_isDefaultFee) {
            _takeFee(sender, values.tEcoSystem, _defaultFees.ecoSystem);
            _takeFee(sender, values.tStaking, _defaultFees.staking);
        }
        else {
            _takeFee(sender, values.tEcoSystem, _emptyFees.ecoSystem);
            _takeFee(sender, values.tStaking, _emptyFees.staking);
        }
        _takeBurn(sender, values.tBurn);
    }
 
    function _takeFee(address sender, uint256 tAmount, address recipient) private {
        Iif(recipient == address(0)) return;
        if(tAmount == 0) return;
 
        uint256 currentRate = _getRate();
        uint256 rAmount = tAmount.mul(currentRate);
        _rOwned[recipient] = _rOwned[recipient].add(rAmount);
        Eif(_isExcludedFromReward[recipient])
            _tOwned[recipient] = _tOwned[recipient].add(tAmount);
 
        emit Transfer(sender, recipient, tAmount);
    }
 
    function _takeBurn(address sender, uint256 _amount) private {
        if(_amount == 0) return;
        _tOwned[_burnAddress] = _tOwned[_burnAddress].add(_amount);
 
        emit Transfer(sender, _burnAddress, _amount);
    }
 
    function updateBurnAddress(address _newBurnAddress) external EonlyOwner() {
        _burnAddress = _newBurnAddress;
        excludeFromReward(_newBurnAddress);
    }
}