// SPDX-License-Identifier: MIT

pragma solidity 0.8.15;

/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @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);

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

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


/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);

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

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


/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}

function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}


/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin Contracts guidelines: functions revert
* instead returning `false` on failure. This behavior is nonetheless
* conventional and does not conflict with the expectations of ERC20
* applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping(address => uint256) private _balances;

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

uint256 private _totalSupply;

string private _name;
string private _symbol;

/**
* @dev Sets the values for {name} and {symbol}.
*
* The default value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}

/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}

/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}

/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5.05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}

/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}

/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}

/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address to, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_transfer(owner, to, amount);
return true;
}

/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}

/**
* @dev See {IERC20-approve}.
*
* NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
* `transferFrom`. This is semantically equivalent to an infinite approval.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_approve(owner, spender, amount);
return true;
}

/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* NOTE: Does not update the allowance if the current allowance
* is the maximum `uint256`.
*
* Requirements:
*
* - `from` and `to` cannot be the zero address.
* - `from` must have a balance of at least `amount`.
* - the caller must have allowance for ``from``'s tokens of at least
* `amount`.
*/
function transferFrom(
address from,
address to,
uint256 amount
) public virtual override returns (bool) {
address spender = _msgSender();
_spendAllowance(from, spender, amount);
_transfer(from, to, amount);
return true;
}

/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
address owner = _msgSender();
_approve(owner, spender, allowance(owner, spender) addedValue);
return true;
}

/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
address owner = _msgSender();
uint256 currentAllowance = allowance(owner, spender);
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(owner, spender, currentAllowance - subtractedValue);
}

return true;
}

/**
* @dev Moves `amount` of tokens from `from` to `to`.
*
* This internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `from` must have a balance of at least `amount`.
*/
function _transfer(
address from,
address to,
uint256 amount
) internal virtual {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");

_beforeTokenTransfer(from, to, amount);

uint256 fromBalance = _balances[from];
require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[from] = fromBalance - amount;
}
_balances[to] = amount;

emit Transfer(from, to, amount);

_afterTokenTransfer(from, to, amount);
}

/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");

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

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

_afterTokenTransfer(address(0), account, amount);
}

/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");

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

uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_balances[account] = accountBalance - amount;
}
_totalSupply -= amount;

emit Transfer(account, address(0), amount);

_afterTokenTransfer(account, address(0), amount);
}

/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
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);
}

/**
* @dev Updates `owner` s allowance for `spender` based on spent `amount`.
*
* Does not update the allowance amount in case of infinite allowance.
* Revert if not enough allowance is available.
*
* Might emit an {Approval} event.
*/
function _spendAllowance(
address owner,
address spender,
uint256 amount
) internal virtual {
uint256 currentAllowance = allowance(owner, spender);
if (currentAllowance != type(uint256).max) {
require(currentAllowance >= amount, "ERC20: insufficient allowance");
unchecked {
_approve(owner, spender, currentAllowance - amount);
}
}
}

/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}

/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}


/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;

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

/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}

/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
_checkOwner();
_;
}

/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}

/**
* @dev Throws if the sender is not the owner.
*/
function _checkOwner() internal view virtual {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
}

/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}

/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}

/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}


/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.

// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;

uint256 private _status;

constructor() {
_status = _NOT_ENTERED;
}

/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and making it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

// Any calls to nonReentrant after this point will fail
_status = _ENTERED;

_;

// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}


interface IDexFactory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}


interface IDexRouter {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function getAmountsOut(
uint amountIn,
address[] calldata path
) external view returns (uint[] memory amounts);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function swapExactETHForTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external payable returns (uint[] memory amounts);
function swapExactTokensForETH(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
}


contract DividendDistributor is ReentrancyGuard {
struct Share {
uint256 amount;
uint256 totalExcluded;
uint256 totalRealised;
}

IDexRouter public constant ROUTER = IDexRouter(0x10ED43C718714eb63d5aA57B78B54704E256024E);
address public immutable token;
address public reward = ROUTER.WETH();

address[] shareHolders;
uint256 currentIndex;

mapping (address => Share) public shares;
mapping (address => uint256) shareholderIndexes;
mapping (address => uint256) shareholderClaims;

uint256 public totalDistributed;
uint256 public totalShares;
uint256 public totalDividends;
uint256 public dividendsPerShare;
uint256 public dividendsPerShareAccuracyFactor = 10**18;

uint256 public gasLimit = 250000;
uint256 public minPeriod = 1 hours;
uint256 public minDistribution = 10**17;

event DividendDistributed(address to, uint256 amount);
event DividendDistributionFailed(address account);
event Deposit(uint256 amount);
event SetShare(address account, uint256 amount);
event Process();
event SetRewardToken(address reward);
event SetDistributionCriteria(uint256 period, uint256 amount);
event SetGasLimit(uint256 gas);

modifier onlyToken() {
require(msg.sender == token, "Caller is not the token");
_;
}

constructor() {
token = msg.sender;
}

// Token

function deposit() external payable onlyToken {
if (msg.value > 0) {
totalDividends = msg.value;
dividendsPerShare = dividendsPerShareAccuracyFactor * msg.value / totalShares;
emit Deposit(msg.value);
}
}

function setShare(address shareholder, uint256 amount) external onlyToken {
if(shares[shareholder].amount > 0){
distributeDividend(shareholder);
}

if(amount > 0 && shares[shareholder].amount == 0){
addShareholder(shareholder);
}else if(amount == 0 && shares[shareholder].amount > 0){
removeShareholder(shareholder);
}

totalShares = totalShares - shares[shareholder].amount amount;
shares[shareholder].amount = amount;
shares[shareholder].totalExcluded = getCumulativeDividends(shares[shareholder].amount);

emit SetShare(shareholder, amount);
}

function process() external onlyToken {
uint256 shareholderCount = shareHolders.length;

if(shareholderCount == 0) { return; }

uint256 gasLeft = gasleft();
uint256 gasUsed;
uint256 avgGasCost;
uint256 iterations;

while(gasUsed avgGasCost < gasLimit && iterations < shareholderCount) {
if(currentIndex >= shareholderCount){
currentIndex = 0;
}

if(shouldDistribute(shareHolders[currentIndex])){
distributeDividend(shareHolders[currentIndex]);
}

gasUsed = gasLeft - gasleft();
gasLeft = gasleft();
currentIndex ;
iterations ;
avgGasCost = gasUsed / iterations;
}

emit Process();
}

// Public

function claimDividend() external {
distributeDividend(msg.sender);
}

function getUnpaidEarnings(address shareholder) public view returns (uint256) {
if(shares[shareholder].amount == 0){ return 0; }

uint256 shareholderTotalDividends = getCumulativeDividends(shares[shareholder].amount);
uint256 shareholderTotalExcluded = shares[shareholder].totalExcluded;

if(shareholderTotalDividends <= shareholderTotalExcluded){ return 0; }
return shareholderTotalDividends - shareholderTotalExcluded;
}

// Private

function shouldDistribute(address shareholder) private view returns (bool) {
return shareholderClaims[shareholder] minPeriod < block.timestamp
&& getUnpaidEarnings(shareholder) > minDistribution;
}

function distributeDividend(address shareholder) private nonReentrant {
if(shares[shareholder].amount == 0){ return; }

uint256 amount = getUnpaidEarnings(shareholder);
if(amount > 0){
if(reward == ROUTER.WETH()) {
(bool success,) = payable(shareholder).call{value: amount}("");
if (success) {
totalDistributed = amount;
shareholderClaims[shareholder] = block.timestamp;
shares[shareholder].totalRealised = amount;
shares[shareholder].totalExcluded = getCumulativeDividends(shares[shareholder].amount);
emit DividendDistributed(shareholder, amount);
} else {
emit DividendDistributionFailed(shareholder);
}
} else {
address[] memory path = new address[](2);
path[0] = ROUTER.WETH();
path[1] = reward;

try ROUTER.swapExactETHForTokens{value: amount}(
0,
path,
shareholder,
block.timestamp
) {
totalDistributed = amount;
shareholderClaims[shareholder] = block.timestamp;
shares[shareholder].totalRealised = amount;
shares[shareholder].totalExcluded = getCumulativeDividends(shares[shareholder].amount);
emit DividendDistributed(shareholder, amount);
} catch {
emit DividendDistributionFailed(shareholder);
}
}
}
}

function getCumulativeDividends(uint256 share) private view returns (uint256) {
return share * dividendsPerShare / dividendsPerShareAccuracyFactor;
}

function addShareholder(address shareholder) private {
shareholderIndexes[shareholder] = shareHolders.length;
shareHolders.push(shareholder);
}

function removeShareholder(address shareholder) private {
shareHolders[shareholderIndexes[shareholder]] = shareHolders[shareHolders.length-1];
shareholderIndexes[shareHolders[shareHolders.length-1]] = shareholderIndexes[shareholder];
shareHolders.pop();
}

// Maintenance

function setRewardToken(address newReward) external onlyToken {
require(
newReward == ROUTER.WETH() || // BNB
newReward == 0x2170Ed0880ac9A755fd29B2688956BD959F933F8 || // ETH
newReward == 0xCC42724C6683B7E57334c4E856f4c9965ED682bD || // MATIC
newReward == 0x570A5D26f7765Ecb712C0924E4De545B89fD43dF || // SOL
newReward == 0x1CE0c2827e2eF14D5C4f29a091d735A204794041 || // AVAX
newReward == 0x0Eb3a705fc54725037CC9e008bDede697f62F335 || // ATOM
newReward == 0x1D2F0da169ceB9fC7B3144628dB156f3F6c60dBE, // XRP
"Invalid reward address"
);

reward = newReward;
emit SetRewardToken(reward);
}

function setDistributionCriteria(uint256 newMinPeriod, uint256 newMinDistribution) external onlyToken {
require(newMinPeriod <= 1 weeks && newMinDistribution <= 1 ether, "Parameters out of bounds");

minPeriod = newMinPeriod;
minDistribution = newMinDistribution;
emit SetDistributionCriteria(newMinPeriod, newMinDistribution);
}

function setGasLimit(uint256 gas) external onlyToken {
require(gas <= 750000 && gas >= 100000, "Gas limit out of bounds");

gasLimit = gas;
emit SetGasLimit(gas);
}
}


contract Altimatum is ERC20, Ownable {
IDexRouter public constant ROUTER = IDexRouter(0x10ED43C718714eb63d5aA57B78B54704E256024E);
DividendDistributor public immutable distributor;
address public immutable pair;

address public adminWallet;
address public marketingWallet;
address public presaleAddress;

address public lastEligibleBuyer;
uint256 public lastBuyBlock;
uint256 public jackpotMinBuy = 10**17;
uint256 public jackpotBlockLimit = 200;
uint256 public jackpotHardCap = 77 ether;
uint256 public jackpotHardCapDenominator = 2;

address public previousWinner;
uint256 public previousJackpot;
uint256 public totalJackpotPaid;

uint256 public buyTax = 900;
uint256 public sellTax = 900;
uint256 public transferTax = 0;
uint256 public jackpotShare = 110;
uint256 public rewardShare = 450;
uint256 public liquidityShare = 110;
uint256 public marketingShare = 330;
uint256 totalShares = 1000;
uint256 constant TAX_DENOMINATOR = 10000;

uint256 public transferGas = 25000;
uint256 public launchTime;

uint256 public swapThreshold = 1;
bool public swapWholeStorage = true;
bool public swapEnabled = true;
bool inSwap;
bool tradingEnabled;

mapping (address => bool) public isTaxExempt;
mapping (address => bool) public isDividendExempt;
mapping (address => bool) public isWhitelisted;

event DepositMarketing(address account, uint256 amount);
event DepositRewards(uint256 amount);
event AutoLiquidity(uint256 amountBNB, uint256 amountTokens);
event AwardJackpot(address winner, uint256 jackpot);
event PreparePresale(address presaleAddress);
event EnableTrading();
event RecoverERC20(address token, address recipient, uint256 amount);
event SetIsWhitelisted(address account, bool exempt);
event SetIsDividendExempt(address account, bool exempt);
event SetIsTaxExempt(address account, bool exempt);
event SetTaxes(uint256 buyTax, uint256 sellTax, uint256 transferTax);
event SetShares(uint256 liquidityShare, uint256 marketingShare, uint256 rewardShare, uint256 jackpotShare);
event TriggerSwapBack(uint256 tokenAmount);
event SetSwapBackSettings(bool enabled, bool swapAll, uint256 tokenAmount);
event SetJackpotSettings(uint256 minBuy, uint256 blockLimit, uint256 hardCap, uint256 hardCapDenominator);
event SetTransferGas(uint256 transferGas);
event SetAdminWallet(address adminWallet);
event SetMarketingWallet(address marketingWallet);

modifier swapping() {
inSwap = true;
_;
inSwap = false;
}

modifier onlyAuthorized() {
require(msg.sender == adminWallet || msg.sender == owner(), "Unauthorized caller");
_;
}

constructor(address marketing) ERC20("Altimatum", "$ALTI") {
require(marketing != address(0), "New marketing wallet is the zero address");

distributor = new DividendDistributor();
pair = IDexFactory(ROUTER.factory()).createPair(address(this), ROUTER.WETH());
marketingWallet = marketing;

isWhitelisted[msg.sender] = true;
isTaxExempt[msg.sender] = true;
isDividendExempt[msg.sender] = true;

isDividendExempt[pair] = true;
isDividendExempt[0x000000000000000000000000000000000000dEaD] = true;
isDividendExempt[address(this)] = true;

_mint(msg.sender, 10 * 10**6 * 10**18);
}

receive() external payable {}

// Override

function _transfer(address sender, address recipient, uint256 amount) internal override {
if (inSwap) {
super._transfer(sender, recipient, amount);
return;
}
if(!tradingEnabled) { require(isWhitelisted[sender], "Trading is disabled"); }

// Jackpot
if (tradingEnabled && address(this).balance >= jackpotHardCap) {
_handleJackpotSizeLimit();
}
if (lastBuyBlock != 0 && block.number - lastBuyBlock >= jackpotBlockLimit) {
_handleJackpot();
}
if (sender == pair && isEligibleForJackpot(amount)) {
lastEligibleBuyer = recipient;
lastBuyBlock = block.number;
}

// Swap
if (_shouldSwapBack(recipient)) {
uint256 swapAmount = swapWholeStorage ? balanceOf(address(this)) : swapThreshold;
_swapBack(swapAmount);
}

// Tax
uint256 amountReceived = isTaxExempt[sender] ? amount : _takeTax(sender, recipient, amount);

// Transfer
super._transfer(sender, recipient, amountReceived);

// Shares
if(!isDividendExempt[sender]){ try distributor.setShare(sender, balanceOf(sender)) {} catch {} }
if(!isDividendExempt[recipient]){ try distributor.setShare(recipient, balanceOf(recipient)) {} catch {} }
try distributor.process() {} catch {}
}

// Tax

/**
* @dev Decrease the buy tax from 99% to normal rate within 3 minutes.
* Returns buy tax value
*/
function getDynamicBuyTax() public view returns (uint256) {
uint256 endingTime = launchTime 3 minutes;

if (endingTime > block.timestamp) {
uint256 remainingTime = endingTime - block.timestamp;
return buyTax (9900 - buyTax) * remainingTime / 3 minutes;
} else {
return buyTax;
}
}

function _takeTax(address sender, address recipient, uint256 amount) private returns (uint256) {
if (amount == 0) { return amount; }

uint256 taxAmount = amount * _getTotalTax(sender, recipient) / TAX_DENOMINATOR;
if (taxAmount > 0) { super._transfer(sender, address(this), taxAmount); }

return amount - taxAmount;
}

function _getTotalTax(address sender, address recipient) private view returns (uint256) {
if (sender == pair) {
return getDynamicBuyTax();
} else if (recipient == pair) {
return sellTax;
} else {
return transferTax;
}
}

// Swap

function _shouldSwapBack(address recipient) private view returns (bool) {
return recipient == pair && swapEnabled && balanceOf(address(this)) >= swapThreshold;
}

function _swapBack(uint256 tokenAmount) private swapping {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = ROUTER.WETH();

uint256 liquidityTokens = tokenAmount * liquidityShare / totalShares / 2;
uint256 amountToSwap = tokenAmount - liquidityTokens;
uint256 balanceBefore = address(this).balance;

_approve(address(this), address(ROUTER), amountToSwap);
ROUTER.swapExactTokensForETH(
amountToSwap,
0,
path,
address(this),
block.timestamp
);

uint256 amountBNB = address(this).balance - balanceBefore;
uint256 totalBNBShares = totalShares - liquidityShare / 2;

uint256 amountBNBLiquidity = amountBNB * liquidityShare / totalBNBShares / 2;
uint256 amountBNBMarketing = amountBNB * marketingShare / totalBNBShares;
uint256 amountBNBRewards = amountBNB * rewardShare / totalBNBShares;

(bool marketingSuccess,) = payable(marketingWallet).call{value: amountBNBMarketing, gas: transferGas}("");
if (marketingSuccess) { emit DepositMarketing(marketingWallet, amountBNBMarketing); }

try distributor.deposit{value: amountBNBRewards}() {
emit DepositRewards(amountBNBRewards);
} catch {}

if (liquidityTokens > 0) {
_approve(address(this), address(ROUTER), liquidityTokens);
try ROUTER.addLiquidityETH{value: amountBNBLiquidity}(
address(this),
liquidityTokens,
0,
0,
0x000000000000000000000000000000000000dEaD,
block.timestamp
) {
emit AutoLiquidity(amountBNBLiquidity, liquidityTokens);
} catch {}
}
}

// Jackpot

function isEligibleForJackpot(uint256 amount) public view returns (bool) {
if (jackpotMinBuy == 0) { return true; }

address[] memory path = new address[](2);
path[0] = ROUTER.WETH();
path[1] = address(this);

uint256 tokensOut = ROUTER.getAmountsOut(jackpotMinBuy, path)[1];
return amount >= tokensOut;
}

function _handleJackpotSizeLimit() private {
uint256 rewardBNB = address(this).balance / jackpotHardCapDenominator;
try distributor.deposit{value: rewardBNB}() {
emit DepositRewards(rewardBNB);
} catch {}
}

function _handleJackpot() private {
uint256 jackpot = address(this).balance;
address winner = lastEligibleBuyer;

lastEligibleBuyer = address(0);
lastBuyBlock = 0;

totalJackpotPaid = jackpot;
previousJackpot = jackpot;
previousWinner = winner;

(bool success,) = payable(winner).call{value: jackpot, gas: transferGas}("");
if (success) {
emit AwardJackpot(winner, jackpot);
} else {
// If jackpot winner is smart contract that can't receive BNB, jackpot is distributed manually.
(bool marketingSuccess,) = payable(marketingWallet).call{value: jackpot, gas: transferGas}("");
if (marketingSuccess) { emit DepositMarketing(marketingWallet, jackpot); }
}
}

// Distributor

function setRewardToken(address newReward) external onlyAuthorized {
distributor.setRewardToken(newReward);
}

function setDistributionCriteria(uint256 minPeriod, uint256 minDistribution) external onlyOwner {
distributor.setDistributionCriteria(minPeriod, minDistribution);
}

function setGasLimit(uint256 gas) external onlyOwner {
distributor.setGasLimit(gas);
}

// Maintenance

function preparePresale(address presale) external onlyOwner {
require(presaleAddress == address(0), "Presale initialised");
presaleAddress = presale;
isWhitelisted[presaleAddress] = true;
isTaxExempt[presaleAddress] = true;
isDividendExempt[presaleAddress] = true;
distributor.setShare(presaleAddress, 0);
emit PreparePresale(presaleAddress);
}

function enableTrading() external onlyOwner {
require(!tradingEnabled, "Trading is already enabled");
tradingEnabled = true;
launchTime = block.timestamp;
emit EnableTrading();
}

function recoverERC20(IERC20 token, address recipient) external onlyOwner {
require(address(token) != address(this), "Can't withdraw this token");
uint256 amount = token.balanceOf(address(this));
token.transfer(recipient, amount);
emit RecoverERC20(address(token), recipient, amount);
}

function setIsWhitelisted(address account, bool exempt) external onlyOwner {
isWhitelisted[account] = exempt;
emit SetIsWhitelisted(account, exempt);
}

function setIsDividendExempt(address account, bool exempt) external onlyOwner {
require(
account != pair &&
account != address(this) &&
account != 0x000000000000000000000000000000000000dEaD &&
account != presaleAddress,
"Invalid parameter"
);

isDividendExempt[account] = exempt;
if (exempt) {
distributor.setShare(account, 0);
} else {
distributor.setShare(account, balanceOf(account));
}

emit SetIsDividendExempt(account, exempt);
}

function setIsTaxExempt(address account, bool exempt) external onlyOwner {
require(account != presaleAddress, "Presale must be tax free");
isTaxExempt[account] = exempt;
emit SetIsTaxExempt(account, exempt);
}

function setTaxes(uint256 newBuyTax, uint256 newSellTax, uint256 newTransferTax) external onlyOwner {
require(newBuyTax <= 1800 && newSellTax <= 1800 && newTransferTax <= 1800, "Too high taxes");
buyTax = newBuyTax;
sellTax = newSellTax;
transferTax = newTransferTax;
emit SetTaxes(buyTax, sellTax, transferTax);
}

function setShares(
uint256 newLiquidityShare,
uint256 newMarketingShare,
uint256 newRewardShare,
uint256 newJackpotShare
) external onlyOwner {
liquidityShare = newLiquidityShare;
marketingShare = newMarketingShare;
rewardShare = newRewardShare;
jackpotShare = newJackpotShare;
totalShares = liquidityShare marketingShare rewardShare jackpotShare;
require(totalShares > 0, "totalShares must be positive number");
emit SetShares(liquidityShare, marketingShare, rewardShare, jackpotShare);
}

function triggerSwapBack(bool swapAll, uint256 amount) external onlyOwner {
uint256 tokenAmount = swapAll ? balanceOf(address(this)) : amount * 10**decimals();
_swapBack(tokenAmount);
emit TriggerSwapBack(tokenAmount);
}

function setSwapBackSettings(bool enabled, bool swapAll, uint256 amount) external onlyAuthorized {
uint256 tokenAmount = amount * 10**decimals();
swapEnabled = enabled;
swapWholeStorage = swapAll;
swapThreshold = tokenAmount;
emit SetSwapBackSettings(enabled, swapAll, tokenAmount);
}

function setJackpotSettings(
uint256 minBuy,
uint256 blockLimit,
uint256 hardCap,
uint256 hardCapDenominator
) external onlyOwner {
require(
minBuy <= 1 ether &&
blockLimit >= 100 && blockLimit <= 600 &&
hardCap >= 30 ether &&
hardCapDenominator >= 2 && hardCapDenominator <= 5,
"Invalid parameters"
);

jackpotMinBuy = minBuy;
jackpotBlockLimit = blockLimit;
jackpotHardCap = hardCap;
jackpotHardCapDenominator = hardCapDenominator;
emit SetJackpotSettings(minBuy, blockLimit, hardCap, hardCapDenominator);
}

function setTransferGas(uint256 newGas) external onlyOwner {
require(newGas >= 21000 && newGas <= 50000, "New gas out of bounds");
transferGas = newGas;
emit SetTransferGas(transferGas);
}

function setAdminWallet(address newWallet) external onlyOwner {
require(newWallet != address(0), "New admin wallet is the zero address");
adminWallet = newWallet;
emit SetAdminWallet(adminWallet);
}

function setMarketingWallet(address newWallet) external onlyOwner {
require(newWallet != address(0), "New marketing wallet is the zero address");
marketingWallet = newWallet;
emit SetMarketingWallet(marketingWallet);
}
}