// SPDX-License-Identifier: Unlicensed


pragma solidity ^0.8.4;

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

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

abstract contract Ownable is Context {
address private _owner;

event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}

function owner() public view virtual returns (address) {
return _owner;
}

modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}

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

function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}

interface IERC20 {
function totalSupply() external view returns (uint256);

function balanceOf(address account) external view returns (uint256);

function transfer(address recipient, uint256 amount) external returns (bool);

function allowance(address owner, address spender) external view returns (uint256);

function approve(address spender, uint256 amount) external returns (bool);

function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);

event Transfer(address indexed from, address indexed to, uint256 value);

event Approval(address indexed owner, address indexed spender, uint256 value);
}

contract ERC20 is Context, IERC20 {
using SafeMath for uint256;

mapping (address => uint256) private _balances;

mapping (address => mapping (address => uint256)) private _allowances;

uint256 private _totalSupply;

string private _name;
string private _symbol;
uint8 private _decimals;

constructor (string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
_decimals = 18;
}

function name() public view virtual returns (string memory) {
return _name;
}

function symbol() public view virtual returns (string memory) {
return _symbol;
}

function decimals() public view virtual returns (uint8) {
return _decimals;
}

function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}

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

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

function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}

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

function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: 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, "ERC20: decreased allowance below zero"));
return true;
}

function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");

_beforeTokenTransfer(sender, recipient, amount);

_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}

function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");

_beforeTokenTransfer(address(0), account, amount);

_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}

function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");

_beforeTokenTransfer(account, address(0), amount);

_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}

function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");

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

function _setupDecimals(uint8 decimals_) internal virtual {
_decimals = decimals_;
}

function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}


interface IDividendPayingToken {
function dividendOf(address _owner) external view returns(uint256);

function withdrawDividend() external;

event DividendsDistributed(
address indexed from,
uint256 weiAmount
);

event DividendWithdrawn(
address indexed to,
uint256 weiAmount
);
}

interface IDividendPayingTokenOptional {
function withdrawableDividendOf(address _owner) external view returns(uint256);

function withdrawnDividendOf(address _owner) external view returns(uint256);

function accumulativeDividendOf(address _owner) external view returns(uint256);
}

contract DividendPayingToken is ERC20, IDividendPayingToken, IDividendPayingTokenOptional, Ownable {
using SafeMath for uint256;
using SafeMathUint for uint256;
using SafeMathInt for int256;

uint256 constant internal magnitude = 2**128;

uint256 internal magnifiedDividendPerShare;
uint256 internal lastAmount;

address public dividendToken;


mapping(address => int256) internal magnifiedDividendCorrections;
mapping(address => uint256) internal withdrawnDividends;
mapping(address => bool) _isAuth;

uint256 public totalDividendsDistributed;

modifier onlyAuth() {
require(_isAuth[msg.sender], "Auth: caller is not the authorized");
_;
}

constructor(string memory _name, string memory _symbol, address _token) ERC20(_name, _symbol) {
dividendToken = _token;
_isAuth[msg.sender] = true;
}

function setAuth(address account) external onlyOwner{
_isAuth[account] = true;
}


function distributeDividends(uint256 amount) public onlyOwner{
require(totalSupply() > 0);

if (amount > 0) {
magnifiedDividendPerShare = magnifiedDividendPerShare.add(
(amount).mul(magnitude) / totalSupply()
);
emit DividendsDistributed(msg.sender, amount);

totalDividendsDistributed = totalDividendsDistributed.add(amount);
}
}

function withdrawDividend() public virtual override {
_withdrawDividendOfUser(payable(msg.sender));
}

function setDividendTokenAddress(address newToken) external virtual onlyOwner{
dividendToken = newToken;
}

function _withdrawDividendOfUser(address payable user) internal returns (uint256) {
uint256 _withdrawableDividend = withdrawableDividendOf(user);
if (_withdrawableDividend > 0) {
withdrawnDividends[user] = withdrawnDividends[user].add(_withdrawableDividend);
emit DividendWithdrawn(user, _withdrawableDividend);
bool success = IERC20(dividendToken).transfer(user, _withdrawableDividend);

if(!success) {
withdrawnDividends[user] = withdrawnDividends[user].sub(_withdrawableDividend);
return 0;
}

return _withdrawableDividend;
}

return 0;
}


function dividendOf(address _owner) public view override returns(uint256) {
return withdrawableDividendOf(_owner);
}

function withdrawableDividendOf(address _owner) public view override returns(uint256) {
return accumulativeDividendOf(_owner).sub(withdrawnDividends[_owner]);
}

function withdrawnDividendOf(address _owner) public view override returns(uint256) {
return withdrawnDividends[_owner];
}


function accumulativeDividendOf(address _owner) public view override returns(uint256) {
return magnifiedDividendPerShare.mul(balanceOf(_owner)).toInt256Safe()
.add(magnifiedDividendCorrections[_owner]).toUint256Safe() / magnitude;
}

function _transfer(address from, address to, uint256 value) internal virtual override {
require(false);

int256 _magCorrection = magnifiedDividendPerShare.mul(value).toInt256Safe();
magnifiedDividendCorrections[from] = magnifiedDividendCorrections[from].add(_magCorrection);
magnifiedDividendCorrections[to] = magnifiedDividendCorrections[to].sub(_magCorrection);
}

function _mint(address account, uint256 value) internal override {
super._mint(account, value);

magnifiedDividendCorrections[account] = magnifiedDividendCorrections[account]
.sub( (magnifiedDividendPerShare.mul(value)).toInt256Safe() );
}

function _burn(address account, uint256 value) internal override {
super._burn(account, value);

magnifiedDividendCorrections[account] = magnifiedDividendCorrections[account]
.add( (magnifiedDividendPerShare.mul(value)).toInt256Safe() );
}

function _setBalance(address account, uint256 newBalance) internal {
uint256 currentBalance = balanceOf(account);

if(newBalance > currentBalance) {
uint256 mintAmount = newBalance.sub(currentBalance);
_mint(account, mintAmount);
} else if(newBalance < currentBalance) {
uint256 burnAmount = currentBalance.sub(newBalance);
_burn(account, burnAmount);
}
}
}

////////////////////////////////
///////// Interfaces ///////////
////////////////////////////////

interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);

function feeTo() external view returns (address);
function feeToSetter() external view returns (address);

function getPair(address tokenA, address tokenB) external view returns (address pair);
function allPairs(uint) external view returns (address pair);
function allPairsLength() external view returns (uint);

function createPair(address tokenA, address tokenB) external returns (address pair);

function setFeeTo(address) external;
function setFeeToSetter(address) external;
}

interface IUniswapV2Pair {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);

function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);

function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint value) external returns (bool);

function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint);

function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;

event Mint(address indexed sender, uint amount0, uint amount1);
event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
event Swap(
address indexed sender,
uint amount0In,
uint amount1In,
uint amount0Out,
uint amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);

function MINIMUM_LIQUIDITY() external pure returns (uint);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
function price0CumulativeLast() external view returns (uint);
function price1CumulativeLast() external view returns (uint);
function kLast() external view returns (uint);

function mint(address to) external returns (uint liquidity);
function burn(address to) external returns (uint amount0, uint amount1);
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
function skim(address to) external;
function sync() external;

function initialize(address, address) external;
}

interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);

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 addLiquidityETH( address token, uint amountTokenDesired, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity( address tokenA, address tokenB, uint liquidity, uint amountAMin, uint amountBMin, address to, uint deadline ) external returns (uint amountA, uint amountB);
function removeLiquidityETH( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit( address tokenA, address tokenB, uint liquidity, uint amountAMin, uint amountBMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external returns (uint[] memory amounts);
function swapTokensForExactTokens( uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline ) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline) external payable returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline) external payable returns (uint[] memory amounts);

function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
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 IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external returns (uint amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountETH);


function swapExactTokensForTokensSupportingFeeOnTransferTokens( 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 swapExactTokensForETHSupportingFeeOnTransferTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external;

}

////////////////////////////////
////////// Libraries ///////////
////////////////////////////////

library IterableMapping {
// Iterable mapping from address to uint;
struct Map {
address[] keys;
mapping(address => uint) values;
mapping(address => uint) indexOf;
mapping(address => bool) inserted;
}

function get(Map storage map, address key) public view returns (uint) {
return map.values[key];
}

function getIndexOfKey(Map storage map, address key) public view returns (int) {
if(!map.inserted[key]) {
return -1;
}
return int(map.indexOf[key]);
}

function getKeyAtIndex(Map storage map, uint index) public view returns (address) {
return map.keys[index];
}



function size(Map storage map) public view returns (uint) {
return map.keys.length;
}

function set(Map storage map, address key, uint val) public {
if (map.inserted[key]) {
map.values[key] = val;
} else {
map.inserted[key] = true;
map.values[key] = val;
map.indexOf[key] = map.keys.length;
map.keys.push(key);
}
}

function remove(Map storage map, address key) public {
if (!map.inserted[key]) {
return;
}

delete map.inserted[key];
delete map.values[key];

uint index = map.indexOf[key];
uint lastIndex = map.keys.length - 1;
address lastKey = map.keys[lastIndex];

map.indexOf[lastKey] = index;
delete map.indexOf[key];

map.keys[index] = lastKey;
map.keys.pop();
}
}

library SafeMath {
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
uint256 c = a b;
if (c < a) return (false, 0);
return (true, c);
}

function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b > a) return (false, 0);
return (true, a - b);
}

function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}

function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a / b);
}

function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a % b);
}

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) {
require(b <= a, "SafeMath: subtraction overflow");
return a - b;
}

function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) return 0;
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}

function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: division by zero");
return a / b;
}

function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: modulo by zero");
return a % b;
}

function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
return a - b;
}

function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a / b;
}

function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a % b;
}
}

library SafeMathInt {
function mul(int256 a, int256 b) internal pure returns (int256) {
// Prevent overflow when multiplying INT256_MIN with -1
// https://github.com/RequestNetwork/requestNetwork/issues/43
require(!(a == - 2**255 && b == -1) && !(b == - 2**255 && a == -1));

int256 c = a * b;
require((b == 0) || (c / b == a));
return c;
}

function div(int256 a, int256 b) internal pure returns (int256) {
// Prevent overflow when dividing INT256_MIN by -1
// https://github.com/RequestNetwork/requestNetwork/issues/43
require(!(a == - 2**255 && b == -1) && (b > 0));

return a / b;
}

function sub(int256 a, int256 b) internal pure returns (int256) {
require((b >= 0 && a - b <= a) || (b < 0 && a - b > a));

return a - b;
}

function add(int256 a, int256 b) internal pure returns (int256) {
int256 c = a b;
require((b >= 0 && c >= a) || (b < 0 && c < a));
return c;
}

function toUint256Safe(int256 a) internal pure returns (uint256) {
require(a >= 0);
return uint256(a);
}
}

library SafeMathUint {
function toInt256Safe(uint256 a) internal pure returns (int256) {
int256 b = int256(a);
require(b >= 0);
return b;
}
}

////////////////////////////////
/////////// Tokens /////////////
////////////////////////////////


contract BUSDDividendTracker is DividendPayingToken {
using SafeMath for uint256;
using SafeMathInt for int256;
using IterableMapping for IterableMapping.Map;

IterableMapping.Map private tokenHoldersMap;
uint256 public lastProcessedIndex;

mapping (address => bool) public excludedFromDividends;

mapping (address => uint256) public lastClaimTimes;

uint256 public claimWait;
uint256 public minimumTokenBalanceForDividends;

event ExcludeFromDividends(address indexed account);
event ClaimWaitUpdated(uint256 indexed newValue, uint256 indexed oldValue);

event Claim(address indexed account, uint256 amount, bool indexed automatic);

constructor(address _dividentToken) DividendPayingToken("Test_Busd_Dividend_Tracker", "Test_Busd_Dividend_Tracker",_dividentToken) {
claimWait = 3600;
minimumTokenBalanceForDividends = 1000000 * (10**18); //must hold 3,000,000,000 tokens
}

function _transfer(address, address, uint256) pure internal override {
require(false, "Test_Busd_Dividend_Tracker: No transfers allowed");
}

function withdrawDividend() pure public override {
require(false, "Test_Busd_Dividend_Tracker: withdrawDividend disabled. Use the 'claim' function on the main Test contract.");
}

function setDividendTokenAddress(address newToken) external override onlyOwner {
dividendToken = newToken;
}

function updateMinimumTokenBalanceForDividends(uint256 _newMinimumBalance) external onlyOwner {
require(_newMinimumBalance != minimumTokenBalanceForDividends, "New mimimum balance for dividend cannot be same as current minimum balance");
minimumTokenBalanceForDividends = _newMinimumBalance * (10**18);
}

function excludeFromDividends(address account) external onlyOwner {
require(!excludedFromDividends[account]);
excludedFromDividends[account] = true;

_setBalance(account, 0);
tokenHoldersMap.remove(account);

emit ExcludeFromDividends(account);
}

function updateClaimWait(uint256 newClaimWait) external onlyOwner {
require(newClaimWait >= 3600 && newClaimWait <= 86400, "Test_Busd_Dividend_Tracker: claimWait must be updated to between 1 and 24 hours");
require(newClaimWait != claimWait, "Test_Busd_Dividend_Tracker: Cannot update claimWait to same value");
emit ClaimWaitUpdated(newClaimWait, claimWait);
claimWait = newClaimWait;
}

function getLastProcessedIndex() external view returns(uint256) {
return lastProcessedIndex;
}

function getNumberOfTokenHolders() external view returns(uint256) {
return tokenHoldersMap.keys.length;
}


function getAccount(address _account)
public view returns (
address account,
int256 index,
int256 iterationsUntilProcessed,
uint256 withdrawableDividends,
uint256 totalDividends,
uint256 lastClaimTime,
uint256 nextClaimTime,
uint256 secondsUntilAutoClaimAvailable) {
account = _account;

index = tokenHoldersMap.getIndexOfKey(account);

iterationsUntilProcessed = -1;

if(index >= 0) {
if(uint256(index) > lastProcessedIndex) {
iterationsUntilProcessed = index.sub(int256(lastProcessedIndex));
}
else {
uint256 processesUntilEndOfArray = tokenHoldersMap.keys.length > lastProcessedIndex ?
tokenHoldersMap.keys.length.sub(lastProcessedIndex) :
0;


iterationsUntilProcessed = index.add(int256(processesUntilEndOfArray));
}
}


withdrawableDividends = withdrawableDividendOf(account);
totalDividends = accumulativeDividendOf(account);

lastClaimTime = lastClaimTimes[account];

nextClaimTime = lastClaimTime > 0 ?
lastClaimTime.add(claimWait) :
0;

secondsUntilAutoClaimAvailable = nextClaimTime > block.timestamp ?
nextClaimTime.sub(block.timestamp) :
0;
}

function getAccountAtIndex(uint256 index)
public view returns (
address,
int256,
int256,
uint256,
uint256,
uint256,
uint256,
uint256) {
if(index >= tokenHoldersMap.size()) {
return (0x0000000000000000000000000000000000000000, -1, -1, 0, 0, 0, 0, 0);
}

address account = tokenHoldersMap.getKeyAtIndex(index);

return getAccount(account);
}

function canAutoClaim(uint256 lastClaimTime) private view returns (bool) {
if(lastClaimTime > block.timestamp) {
return false;
}

return block.timestamp.sub(lastClaimTime) >= claimWait;
}

function setBalance(address payable account, uint256 newBalance) external onlyOwner {
if(excludedFromDividends[account]) {
return;
}

if(newBalance >= minimumTokenBalanceForDividends) {
_setBalance(account, newBalance);
tokenHoldersMap.set(account, newBalance);
}
else {
_setBalance(account, 0);
tokenHoldersMap.remove(account);
}

processAccount(account, true);
}

function process(uint256 gas) public returns (uint256, uint256, uint256) {
uint256 numberOfTokenHolders = tokenHoldersMap.keys.length;

if(numberOfTokenHolders == 0) {
return (0, 0, lastProcessedIndex);
}

uint256 _lastProcessedIndex = lastProcessedIndex;

uint256 gasUsed = 0;

uint256 gasLeft = gasleft();

uint256 iterations = 0;
uint256 claims = 0;

while(gasUsed < gas && iterations < numberOfTokenHolders) {
_lastProcessedIndex ;

if(_lastProcessedIndex >= tokenHoldersMap.keys.length) {
_lastProcessedIndex = 0;
}

address account = tokenHoldersMap.keys[_lastProcessedIndex];

if(canAutoClaim(lastClaimTimes[account])) {
if(processAccount(payable(account), true)) {
claims ;
}
}

iterations ;

uint256 newGasLeft = gasleft();

if(gasLeft > newGasLeft) {
gasUsed = gasUsed.add(gasLeft.sub(newGasLeft));
}

gasLeft = newGasLeft;
}

lastProcessedIndex = _lastProcessedIndex;

return (iterations, claims, lastProcessedIndex);
}

function processAccount(address payable account, bool automatic) public onlyOwner returns (bool) {
uint256 amount = _withdrawDividendOfUser(account);

if(amount > 0) {
lastClaimTimes[account] = block.timestamp;
emit Claim(account, amount, automatic);
return true;
}

return false;
}
}

contract deltaace is ERC20, Ownable {
using SafeMath for uint256;

IUniswapV2Router02 public uniswapV2Router;
address public immutable uniswapV2Pair;

address public busdDividendToken;
address public deadAddress = 0x000000000000000000000000000000000000dEaD;

bool private swapping;
bool public tradingIsEnabled = true;
bool public marketingEnabled = true;
bool public swapAndLiquifyEnabled = true;
bool public busdDividendEnabled = true;


BUSDDividendTracker public busdDividendTracker;

address public marketingWallet;

uint256 public maxBuyTranscationAmount = 700000000 * (10**18);
uint256 public maxSellTransactionAmount = 500000000 * (10**18);
uint256 public maxWalletBalance = 1000000000 * (10**18);
uint256 public swapTokensAtAmount = 20 * 10**6 * 10**18;

uint256 public liquidityFee;
uint256 public previousLiquidityFee;

uint256 public busdDividendRewardsFee;
uint256 public previousBusdDividendRewardsFee;

uint256 public marketingFee;
uint256 public previousMarketingFee;

uint256 public buybackFee;
uint256 public previousBuybackFee;

uint256 public totalFees = busdDividendRewardsFee.add(marketingFee).add(liquidityFee).add(buybackFee);

uint256 public _busdDividendRewardsFeeBuy = 1;
uint256 public _marketingFeeBuy = 3;
uint256 public _LpFeeBuy = 2;
uint256 public _buybackFeeBuy = 1;

uint256 public _busdDividendRewardsFeeSell= 1;
uint256 public _LpFeeSell= 2;
uint256 public _marketingFeeSell= 5;
uint256 public _buybackFeeSell = 1;

uint256 public busdDividedRewardsInContract;
uint256 public tokensForLpInContract;

uint256 public sellFeeIncreaseFactor = 130;

uint256 public gasForProcessing = 300000;

mapping (address => bool) private isExcludedFromFees;

// store addresses that a automatic market maker pairs. Any transfer *to* these addresses
// could be subject to a maximum transfer amount
mapping (address => bool) public automatedMarketMakerPairs;

event UpdatebusdDividendTracker(address indexed newAddress, address indexed oldAddress);

event UpdateUniswapV2Router(address indexed newAddress, address indexed oldAddress);

event SwapAndLiquifyEnabledUpdated(bool enabled);
event MarketingEnabledUpdated(bool enabled);
event BusdDividendEnabledUpdated(bool enabled);


event ExcludeFromFees(address indexed account, bool isExcluded);
event ExcludeMultipleAccountsFromFees(address[] accounts, bool isExcluded);

event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);

event MarketingWalletUpdated(address indexed newMarketingWallet, address indexed oldMarketingWallet);

event GasForProcessingUpdated(uint256 indexed newValue, uint256 indexed oldValue);

event SwapAndLiquify(
uint256 tokensSwapped,
uint256 bnbReceived,
uint256 tokensIntoLiqudity
);

event SendDividends(
uint256 amount
);

event ProcessedbusdDividendTracker(
uint256 iterations,
uint256 claims,
uint256 lastProcessedIndex,
bool indexed automatic,
uint256 gas,
address indexed processor
);



constructor() ERC20("Delta Ace", "ACED") {

marketingWallet = 0x116C0A9b3b9D3B92Ed821e88083CD06255194B04;
busdDividendToken = 0xe9e7CEA3DedcA5984780Bafc599bD69ADd087D56;

busdDividendTracker = new BUSDDividendTracker(busdDividendToken);

IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x10ED43C718714eb63d5aA57B78B54704E256024E);
// Create a uniswap pair for this new token
address _uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());

uniswapV2Router = _uniswapV2Router;
uniswapV2Pair = _uniswapV2Pair;

_setAutomatedMarketMakerPair(_uniswapV2Pair, true);

excludeFromDividend(address(busdDividendTracker));
excludeFromDividend(address(this));
excludeFromDividend(address(_uniswapV2Router));
excludeFromDividend(deadAddress);

// exclude from paying fees or having max transaction amount
excludeFromFees(marketingWallet, true);
excludeFromFees(address(this), true);
excludeFromFees(deadAddress, true);
excludeFromFees(owner(), true);

setAuthOnDividends(owner());

/*
_mint is an internal function in ERC20.sol that is only called here,
and CANNOT be called ever again
*/
_mint(owner(), 10000000000 * (10**18));
}

receive() external payable {

}

function prepareForPartherOrExchangeListing(address _partnerOrExchangeAddress) external onlyOwner {
busdDividendTracker.excludeFromDividends(_partnerOrExchangeAddress);
excludeFromFees(_partnerOrExchangeAddress, true);
}

function setWalletBalance(uint256 _maxWalletBalance) external onlyOwner{
maxWalletBalance = _maxWalletBalance;
}

function setMaxBuyTransaction(uint256 _maxTxn) external onlyOwner {
maxBuyTranscationAmount = _maxTxn * (10**18);
}

function setMarketingFeeBuy(uint256 fee) external onlyOwner {
_marketingFeeBuy = fee * (10**18);
}

function setBuybackFeeBuy(uint256 fee) external onlyOwner {
_buybackFeeBuy = fee * (10**18);
}

function setLpFeeBuy(uint256 LpFeeBuy) external onlyOwner {
_LpFeeBuy = LpFeeBuy * (10**18);
}

function setMarketingFeeSell(uint256 fee) external onlyOwner {
_marketingFeeSell = fee * (10**18);
}

function setBuybackFeeSell(uint256 fee) external onlyOwner {
_buybackFeeSell = fee * (10**18);
}

function setLpFeeSell(uint256 LpFeeSell) external onlyOwner {
_LpFeeSell = LpFeeSell * (10**18);
}

function setMaxSellTransaction(uint256 _maxTxn) external onlyOwner {
maxSellTransactionAmount = _maxTxn * (10**18);
}


function updateBusdDividendToken(address _newContract) external onlyOwner {
busdDividendToken = _newContract;
busdDividendTracker.setDividendTokenAddress(_newContract);
}

function updateMarketingWallet(address _newWallet) external onlyOwner {
require(_newWallet != marketingWallet, "Test: The marketing wallet is already this address");
excludeFromFees(_newWallet, true);
emit MarketingWalletUpdated(marketingWallet, _newWallet);
marketingWallet = _newWallet;
}

function setSwapTokensAtAmount(uint256 _swapAmount) external onlyOwner {
swapTokensAtAmount = _swapAmount * (10**18);
}

function setSellTransactionMultiplier(uint256 _multiplier) external onlyOwner {
sellFeeIncreaseFactor = _multiplier;
}






function setAuthOnDividends(address account) public onlyOwner {
busdDividendTracker.setAuth(account);
}

function setBusdDividendEnabled(bool _enabled) external onlyOwner {
require(busdDividendEnabled != _enabled, "Can't set flag to same status");
if (_enabled == false) {
previousBusdDividendRewardsFee = busdDividendRewardsFee;
busdDividendRewardsFee = 0;
busdDividendEnabled = _enabled;
}

emit BusdDividendEnabledUpdated(_enabled);
}


function setMarketingEnabled(bool _enabled) external onlyOwner {
require(marketingEnabled != _enabled, "Can't set flag to same status");
if (_enabled == false) {
previousMarketingFee = marketingFee;
marketingFee = 0;
marketingEnabled = _enabled;
}

emit MarketingEnabledUpdated(_enabled);
}

function setSwapAndLiquifyEnabled(bool _enabled) external onlyOwner {
require(swapAndLiquifyEnabled != _enabled, "Can't set flag to same status");
if (_enabled == false) {
previousLiquidityFee = liquidityFee;
liquidityFee = 0;
swapAndLiquifyEnabled = _enabled;
}

emit SwapAndLiquifyEnabledUpdated(_enabled);
}


function updatebusdDividendTracker(address newAddress) external onlyOwner {
require(newAddress != address(busdDividendTracker), "Test: The dividend tracker already has that address");

BUSDDividendTracker newbusdDividendTracker = BUSDDividendTracker(payable(newAddress));

require(newbusdDividendTracker.owner() == address(this), "Test: The new dividend tracker must be owned by the Test token contract");

newbusdDividendTracker.excludeFromDividends(address(newbusdDividendTracker));
newbusdDividendTracker.excludeFromDividends(address(this));
newbusdDividendTracker.excludeFromDividends(address(uniswapV2Router));
newbusdDividendTracker.excludeFromDividends(address(deadAddress));

emit UpdatebusdDividendTracker(newAddress, address(busdDividendTracker));

busdDividendTracker = newbusdDividendTracker;
}

function updateUniswapV2Router(address newAddress) external onlyOwner {
require(newAddress != address(uniswapV2Router), "Test: The router already has that address");
emit UpdateUniswapV2Router(newAddress, address(uniswapV2Router));
uniswapV2Router = IUniswapV2Router02(newAddress);
}

function excludeFromFees(address account, bool excluded) public onlyOwner {
require(isExcludedFromFees[account] != excluded, "Test: Account is already exluded from fees");
isExcludedFromFees[account] = excluded;

emit ExcludeFromFees(account, excluded);
}

function excludeFromDividend(address account) public onlyOwner {
busdDividendTracker.excludeFromDividends(address(account));

}

function setAutomatedMarketMakerPair(address pair, bool value) public onlyOwner {
require(pair != uniswapV2Pair, "Test: The PancakeSwap pair cannot be removed from automatedMarketMakerPairs");

_setAutomatedMarketMakerPair(pair, value);
}

function _setAutomatedMarketMakerPair(address pair, bool value) private onlyOwner {
require(automatedMarketMakerPairs[pair] != value, "Test: Automated market maker pair is already set to that value");
automatedMarketMakerPairs[pair] = value;

if(value) {
busdDividendTracker.excludeFromDividends(pair);

}

emit SetAutomatedMarketMakerPair(pair, value);
}

function updateGasForProcessing(uint256 newValue) external onlyOwner {
require(newValue != gasForProcessing, "Test: Cannot update gasForProcessing to same value");
gasForProcessing = newValue;
emit GasForProcessingUpdated(newValue, gasForProcessing);
}

function updateMinimumBalanceForDividends(uint256 newMinimumBalance) external onlyOwner {
busdDividendTracker.updateMinimumTokenBalanceForDividends(newMinimumBalance);
}

function updateClaimWait(uint256 claimWait) external onlyOwner {
busdDividendTracker.updateClaimWait(claimWait);

}

function getBusdClaimWait() external view returns(uint256) {
return busdDividendTracker.claimWait();
}



function getTotalBusdDividendsDistributed() external view returns (uint256) {
return busdDividendTracker.totalDividendsDistributed();
}



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

function withdrawableBusdDividendOf(address account) external view returns(uint256) {
return busdDividendTracker.withdrawableDividendOf(account);
}



function busdDividendTokenBalanceOf(address account) external view returns (uint256) {
return busdDividendTracker.balanceOf(account);
}



function getAccountBusdDividendsInfo(address account)
external view returns (
address,
int256,
int256,
uint256,
uint256,
uint256,
uint256,
uint256) {
return busdDividendTracker.getAccount(account);
}


function getAccountBusdDividendsInfoAtIndex(uint256 index)
external view returns (
address,
int256,
int256,
uint256,
uint256,
uint256,
uint256,
uint256) {
return busdDividendTracker.getAccountAtIndex(index);
}


function processDividendTracker(uint256 gas) external onlyOwner {
(uint256 busdIterations, uint256 busdClaims, uint256 busdLastProcessedIndex) = busdDividendTracker.process(gas);
emit ProcessedbusdDividendTracker(busdIterations, busdClaims, busdLastProcessedIndex, false, gas, tx.origin);


}

function claim() external {
busdDividendTracker.processAccount(payable(msg.sender), false);

}
function getLastBusdDividendProcessedIndex() external view returns(uint256) {
return busdDividendTracker.getLastProcessedIndex();
}



function getNumberOfBusdDividendTokenHolders() external view returns(uint256) {
return busdDividendTracker.getNumberOfTokenHolders();
}


function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(tradingIsEnabled || (isExcludedFromFees[from] || isExcludedFromFees[to]), "Test: Trading has not started yet");

bool excludedAccount = isExcludedFromFees[from] || isExcludedFromFees[to];

if(!automatedMarketMakerPairs[to] && tradingIsEnabled && !excludedAccount){
require(balanceOf(to).add(amount) <= maxWalletBalance, 'Wallet balance is exceeding maxWalletBalance');
}

if (
tradingIsEnabled &&
automatedMarketMakerPairs[from] &&
!excludedAccount
) {
require(amount <= maxBuyTranscationAmount, "Transfer amount exceeds the maxTxAmount.");

busdDividendRewardsFee = _busdDividendRewardsFeeBuy;
marketingFee = _marketingFeeBuy;
liquidityFee = _LpFeeBuy;
buybackFee = _buybackFeeBuy;
} else if (
tradingIsEnabled &&
automatedMarketMakerPairs[to] &&
!excludedAccount
) {
require(amount <= maxSellTransactionAmount, "Sell transfer amount exceeds the maxSellTransactionAmount.");

busdDividendRewardsFee = _busdDividendRewardsFeeSell;
marketingFee = _marketingFeeSell;
liquidityFee = _LpFeeSell;
buybackFee = _buybackFeeSell;
}


uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;

if (!swapping && canSwap && from != uniswapV2Pair) {
swapping = true;

if(swapAndLiquifyEnabled) {
uint256 liqTokens = tokensForLpInContract;
swapAndLiquify(liqTokens);
tokensForLpInContract = 0;
}

if (busdDividendEnabled) {
uint256 busdTokens = busdDividedRewardsInContract;
swapAndSendBusdDividends(busdTokens);
busdDividedRewardsInContract = 0;
}


swapping = false;
}

bool takeFee = tradingIsEnabled && !swapping && !excludedAccount;

if(takeFee) {
uint256 fees;

uint256 tmpMarketingRewardPercent;
uint256 tmpBusdDividedRewardsInContract;
uint256 tmpLpRewardInContract;
uint256 tmpBuyBackRewardPercent;

tmpMarketingRewardPercent = amount.mul(marketingFee).div(100);
tmpBusdDividedRewardsInContract = amount.mul(busdDividendRewardsFee).div(100);
tmpLpRewardInContract = amount.mul(liquidityFee).div(100);
tmpBuyBackRewardPercent = amount.mul(buybackFee).div(100);

fees = tmpMarketingRewardPercent.add(tmpBusdDividedRewardsInContract)
.add(tmpLpRewardInContract).add(tmpBuyBackRewardPercent);

busdDividedRewardsInContract = busdDividedRewardsInContract.add(tmpBusdDividedRewardsInContract);

tokensForLpInContract = tokensForLpInContract.add(tmpLpRewardInContract);

// if sell, multiply by 1.2
if(automatedMarketMakerPairs[to]) {
fees = fees.div(100).mul(sellFeeIncreaseFactor);
}

amount = amount.sub(fees);
super._transfer(from, address(this), fees);
super._transfer(address(this),marketingWallet,tmpMarketingRewardPercent);

amount = amount.sub(fees);
super._transfer(from, address(this), fees);
super._transfer(address(this),marketingWallet,tmpBuyBackRewardPercent);
}

super._transfer(from, to, amount);

try busdDividendTracker.setBalance(payable(from), balanceOf(from)) {} catch {}

try busdDividendTracker.setBalance(payable(to), balanceOf(to)) {} catch {}

if(!swapping) {
uint256 gas = gasForProcessing;

try busdDividendTracker.process(gas) returns (uint256 iterations, uint256 claims, uint256 lastProcessedIndex) {
emit ProcessedbusdDividendTracker(iterations, claims, lastProcessedIndex, true, gas, tx.origin);
}
catch {

}
}
}


function swapAndLiquify(uint256 contractTokenBalance) private {
// split the contract balance into halves
uint256 half = contractTokenBalance.div(2);
uint256 otherHalf = contractTokenBalance.sub(half);

uint256 initialBalance = address(this).balance;

swapTokensForBNB(half);

uint256 newBalance = address(this).balance.sub(initialBalance);

addLiquidity(otherHalf, newBalance);

emit SwapAndLiquify(half, newBalance, otherHalf);
}

function addLiquidity(uint256 tokenAmount, uint256 bnbAmount) 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, // slippage is unavoidable
0, // slippage is unavoidable
marketingWallet,
block.timestamp
);
}


function swapTokensForBNB(uint256 tokenAmount) private {
// generate the uniswap pair path of token -> weth
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 ETH
path,
address(this),
block.timestamp
);

}

function swapTokensForDividendToken(uint256 _tokenAmount, address _recipient, address _dividendAddress) private {
address[] memory path = new address[](3);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
path[2] = _dividendAddress;

_approve(address(this), address(uniswapV2Router), _tokenAmount);

// make the swap
uniswapV2Router.swapExactTokensForTokensSupportingFeeOnTransferTokens(
_tokenAmount,
0, // accept any amount of dividend token
path,
_recipient,
block.timestamp
);
}

function swapAndSendBusdDividends(uint256 tokens) private {
swapTokensForDividendToken(tokens, address(this), busdDividendToken);
uint256 busdDividends = IERC20(busdDividendToken).balanceOf(address(this));
transferDividends(busdDividendToken, address(busdDividendTracker), busdDividendTracker, busdDividends);
}


function transferToWallet(address payable recipient, uint256 amount) private {
recipient.transfer(amount);
}

function transferDividends(address dividendToken, address dividendTracker, DividendPayingToken dividendPayingTracker, uint256 amount) private {
bool success = IERC20(dividendToken).transfer(dividendTracker, amount);

if (success) {
dividendPayingTracker.distributeDividends(amount);
emit SendDividends(amount);
}
}
}