// Sources flattened with hardhat v2.11.1 https://hardhat.org

// File @openzeppelin/contracts/security/ReentrancyGuard.sol@v4.7.3

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

/**
 * @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;
    }
}


// File @openzeppelin/contracts/utils/Context.sol@v4.7.3
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @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;
    }
}


// File @openzeppelin/contracts/access/Ownable.sol@v4.7.3
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

/**
 * @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);
    }
}


// File @openzeppelin/contracts/utils/Address.sol@v4.7.3
// OpenZeppelin Contracts (last updated v4.7.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly
                /// @solidity memory-safe-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}


// File contracts/EthericeBiggestBuy.sol
pragma solidity 0.8.16;



interface EthericeTokenInterface {
    function dev_addr() external returns (address);
    function rewards_addr() external returns (address);
}

contract EthericeBiggestBuy is Ownable, ReentrancyGuard {
    event BiggestBuyCompWinner(
        address indexed addr,
        uint256 timestamp,
        uint256 rawAmount,
        uint256 topBuy
    );
    event BuyCompStarted(
        uint256 timestamp
    );
    event NewTopBuyToday(
        address indexed addr,
        uint256 indexed value
    );

    /* top lottery buyer of the day (so far) */
    uint256 public topBuyTodayAmount;
    address public topBuyTodayAddress;

    /* latest top lottery bought amount (reduced each day we have no winner) */
    uint256 public topBuy;

    /* tax splits for when we have a lottery winner */
    uint256 public rewardsPercentage = 30;
    uint256 public winnerPercentage = 30;
    uint256 public devPercentage = 10;

    uint256 constant public FEE_DENOMINATOR = 1000;

    /* @dev Some addresses should be excluded from lottery such as the buyback address  */
    mapping(address => bool) public excludeFromComp;

    EthericeTokenInterface private _tokenContract;

    /* @dev amount we will reduce the top buy by each day, includes one decimal so 25  === 2.5% */
    uint256 public dailyTopBuyReductionPercentage = 50;

    /** when false the contract will accumulate funds but not record max buys or payout */
    bool public startLottery;

    address public deployer;

    constructor(){
        deployer = msg.sender;
    }

    receive() external payable {}

    /**
        @dev Start the lottery recording max buys
        @param _tokenAddress the address of the etherice token
    */
    function doStartComp(address _tokenAddress) external  {
        require(_tokenAddress != address(0), "Token contract address cannot be zero");
        require(deployer == msg.sender, "Only deployer can start the lottery");
        require(deployer != owner(), "Ownership must be transferred before the lottery can be started");
        _tokenContract = EthericeTokenInterface(_tokenAddress);   
        startLottery = true;
        emit BuyCompStarted(block.timestamp);
    }

    /**
        @dev update the distribution %'s of the lottery winnings
        @param _dev % sent to the dev wallet
        @param _rewards % sent to the rewards wallet
        @param _winner % sent to the winner
    */
    function updatePercentages(uint256 _dev, uint256 _rewards, uint256 _winner) external onlyOwner {
        require(_dev + _rewards + _winner <= 100, "Rewards split cant be more than 100%");
        rewardsPercentage  = _rewards;
        devPercentage = _dev;
        winnerPercentage = _winner;
    }

    /**
        @dev we reduce the top buy each day so if there's one huge buy 
        over time there's still a chance for others to win the max buy
        @param _newTopBuyReductionPercentage 100 = 10%
     */
    function updateDailyTopBuyReductionPercentage(uint256 _newTopBuyReductionPercentage) external onlyOwner {
        require(_newTopBuyReductionPercentage <= 990, "Percent cant be more than 99%");
        dailyTopBuyReductionPercentage = _newTopBuyReductionPercentage;
    }

    /**
        @dev allows us to exclude wallets from the max buy record. The buyback 
        wallet for example so it doesn't always get max buys
    */
    function excludeAddressFromLottery(address _address, bool _shouldExclude) external onlyOwner {
        require(! startLottery, "Addresses can't be excluded once the lottery has started");
        excludeFromComp[_address] = _shouldExclude;
    }

    /**
        @dev Can only be trigger by the token contract to record a new buy  
        @param _amount the buy amount
        @param _address the buyer address
    */
    function newBuy(uint256 _amount, address _address) external  {
        if(msg.sender != address(_tokenContract)) return;
        if( excludeFromComp[_address] ) return;
        if(! startLottery) return;
        if(_amount > topBuyTodayAmount){
            topBuyTodayAmount = _amount;
            topBuyTodayAddress = _address;
            emit NewTopBuyToday(_address, _amount);
        }
    }

    /** 
        @dev Runs once a day and checks for lottry winner  
    */
    function checkForWinner() external nonReentrant {        
        if(msg.sender != address(_tokenContract)) return;
        if(! startLottery) return;
        if(address(this).balance == 0) return;

        if (topBuyTodayAmount > topBuy) {
            _processWin();
        } else {
            // no winner, reducing the record by dailyTopBuyReductionPercentage
            topBuy -= topBuy * dailyTopBuyReductionPercentage / FEE_DENOMINATOR;
        }
    
        // Reset the top buys
        topBuyTodayAmount = 0;
        topBuyTodayAddress = address(0);
    }

    function _processWin() internal  {
        // Set the new top amount for the next lottery
        topBuy = topBuyTodayAmount;

        // We use the full contract balance as the lottery pool
        uint256 poolBalance = address(this).balance;

        uint256 _winnerAmount = poolBalance * winnerPercentage / 100;
        uint256 _devAmount = poolBalance * devPercentage / 100;
        uint256 _rewardsAmount = poolBalance * rewardsPercentage / 100;

        if(topBuyTodayAddress != address(0)){
            Address.sendValue( payable(topBuyTodayAddress) , _winnerAmount);
        }
        
        Address.sendValue(payable(_tokenContract.dev_addr()), _devAmount);
        Address.sendValue(payable(_tokenContract.rewards_addr()), _rewardsAmount);

        emit BiggestBuyCompWinner(
            topBuyTodayAddress,
            block.timestamp,
            _winnerAmount,
            topBuy
        );
    }
}