// File: Context.sol



// SPDX-License-Identifier: UNLICENSED

pragma solidity ^0.7.4;

/*
 * @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 GSN 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 payable) {
        return 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;
    }
}
// File: IERC20.sol



// SPDX-License-Identifier: UNLICENSED

pragma solidity ^0.7.4;


/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @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 `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

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

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

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

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

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



// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.7.4;

import "./Context.sol";

/**
 * @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.
 */
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() {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

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

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        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 {
        emit OwnershipTransferred(_owner, address(0));
        _owner = 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"
        );
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

// File: SafeMath.sol



// SPDX-License-Identifier: UNLICENSED

pragma solidity ^0.7.4;

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (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 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}
// File: TBIRDPresale_Ethereum.sol



// SPDX-License-Identifier: MIT
/**
 *
 *
 *    TBIRD Presale Contract
 *
 *
 *
 **/

pragma solidity ^0.7.4;

import "./Context.sol";
import "./Ownable.sol";
import "./SafeMath.sol";

abstract contract DateTimeAPI {
    /*
     *  Abstract contract for interfacing with the DateTime contract.
     *
     */
    function isLeapYear(uint16 year) public pure virtual returns (bool);

    function toTimestamp(
        uint16 year,
        uint8 month,
        uint8 day
    ) public pure virtual returns (uint256 timestamp);

    function toTimestamp(
        uint16 year,
        uint8 month,
        uint8 day,
        uint8 hour,
        uint8 minute,
        uint8 second
    ) public pure virtual returns (uint256 timestamp);
}

interface AggregatorV3Interface {
    function decimals() external view returns (uint8);

    function description() external view returns (string memory);

    function version() external view returns (uint256);

    // getRoundData and latestRoundData should both raise "No data present"
    // if they do not have data to report, instead of returning unset values
    // which could be misinterpreted as actual reported values.
    function getRoundData(uint80 _roundId)
        external
        view
        returns (
            uint80 roundId,
            int256 answer,
            uint256 startedAt,
            uint256 updatedAt,
            uint80 answeredInRound
        );

    function latestRoundData()
        external
        view
        returns (
            uint80 roundId,
            int256 answer,
            uint256 startedAt,
            uint256 updatedAt,
            uint80 answeredInRound
        );
}

contract TBIRDPresale is Ownable {
    using SafeMath for uint256;

    uint256 public privPresaleStartTime = 1633723200;
    uint256 public privPresaleEndTime = 1633896000;

    uint256 public pubPresaleStartTime = 1633723200;
    uint256 public pubPresaleEndTime = 1633896000;

    uint256 public privPresaleCap = 60_000_000e9; //10% of total supply
    uint256 public pubPresaleCap = 60_000_000e9; //10% of total supply

    uint256 public privPresalePrice = 8000; // $0.008 USDC (decimal 6)
    uint256 public pubPresalePrice = 9000; // $0.009 USDC

    uint256 public privPresaleMinLimit = 200_000e6; //USD
    uint256 public pubPresaleMinLimit = 10_000e6; //USD

    struct User {
        uint256 ethAmount;
        uint256 tbirdAmount;
        address polygonWalletAddress;
    }

    mapping(address => bool) privWhiteList;
    mapping(address => User) privUsers;
    mapping(uint256 => address) privUserIDs;
    uint256 public privUserCount = 0;
    uint256 public privSoldTokenAmount = 0;
    uint256 public privTotalPurchased = 0;

    mapping(address => bool) pubWhiteList;
    mapping(address => User) pubUsers;
    mapping(uint256 => address) pubUserIDs;
    uint256 public pubUserCount = 0;
    uint256 public pubSoldTokenAmount = 0;
    uint256 public pubTotalPurchased = 0;

    AggregatorV3Interface internal priceFeedETH;

    address serviceWallet;

    constructor() {
        priceFeedETH = AggregatorV3Interface(
            0x5f4eC3Df9cbd43714FE2740f5E3616155c5b8419
        );
    }

    function buyPrivTBIRD(address polygonWalletAddress) external payable {
        require(checkPrivWhiteList(msg.sender), "Not white list user");

        uint256 ethAmount = msg.value;
        uint256 ethPrice = getETHPrice();
        uint256 usdAmount = ethAmount.mul(ethPrice).div(1e20);
        require(usdAmount >= privPresaleMinLimit, "Less than minimun limit");

        uint256 tbirdAmount = usdAmount.mul(1e9).div(privPresalePrice);
        privSoldTokenAmount = privSoldTokenAmount.add(tbirdAmount);
        require(
            privSoldTokenAmount <= privPresaleCap,
            "Insufficient Token Balance"
        );

        if (privUserExists(msg.sender)) {
            User storage user = privUsers[msg.sender];
            user.ethAmount = user.ethAmount.add(ethAmount);
            user.tbirdAmount = user.tbirdAmount.add(tbirdAmount);
            user.polygonWalletAddress = polygonWalletAddress;
        } else {
            privUsers[msg.sender] = User({
                ethAmount: ethAmount,
                tbirdAmount: tbirdAmount,
                polygonWalletAddress: polygonWalletAddress
            });
            privUserIDs[privUserCount] = msg.sender;

            privUserCount++;
        }

        privTotalPurchased = privTotalPurchased.add(ethAmount);
    }

    //auto claiming, system will send $TBIRD token to user's polygon wallet.
    function buyPubTBIRD(address polygonWalletAddress) external payable {
        require(checkPubWhiteList(msg.sender), "Not white list user");

        uint256 ethAmount = msg.value;
        uint256 ethPrice = getETHPrice();
        uint256 usdAmount = ethAmount.mul(ethPrice).div(1e20);
        require(usdAmount >= pubPresaleMinLimit, "Less than minimun limit");

        uint256 tbirdAmount = usdAmount.mul(1e9).div(pubPresalePrice);
        pubSoldTokenAmount = pubSoldTokenAmount.add(tbirdAmount);
        require(
            pubSoldTokenAmount <= pubPresaleCap,
            "Insufficient Token Balance"
        );

        if (pubUserExists(msg.sender)) {
            User storage user = pubUsers[msg.sender];
            user.ethAmount = user.ethAmount.add(ethAmount);
            user.tbirdAmount = user.tbirdAmount.add(tbirdAmount);
            user.polygonWalletAddress = polygonWalletAddress;
        } else {
            pubUsers[msg.sender] = User({
                ethAmount: ethAmount,
                tbirdAmount: tbirdAmount,
                polygonWalletAddress: polygonWalletAddress
            });
            pubUserIDs[pubUserCount] = msg.sender;
            pubUserCount++;
        }

        pubTotalPurchased = pubTotalPurchased.add(ethAmount);
    }

    function privUserExists(address userAddress) public view returns (bool) {
        return (privUsers[userAddress].ethAmount != 0);
    }

    function pubUserExists(address userAddress) public view returns (bool) {
        return (pubUsers[userAddress].ethAmount != 0);
    }

    function privSaleUserInfo(uint256 index)
        public
        view
        returns (
            uint256 ethAmount,
            uint256 tbirdAmount,
            address polygonWalletAddress
        )
    {
        require(index < privUserCount, "Invalid index");

        return privSaleUserInfoFromAddress(privUserIDs[index]);
    }

    function privSaleUserInfoFromAddress(address userAddress)
        public
        view
        returns (
            uint256 ethAmount,
            uint256 tbirdAmount,
            address polygonWalletAddress
        )
    {
        require(privUserExists(userAddress), "Not exists");

        User memory user = privUsers[userAddress];

        ethAmount = user.ethAmount;
        tbirdAmount = user.tbirdAmount;
        polygonWalletAddress = user.polygonWalletAddress;
    }

    function pubSaleUserInfo(uint256 index)
        public
        view
        returns (
            uint256 ethAmount,
            uint256 tbirdAmount,
            address polygonWalletAddress
        )
    {
        require(index < pubUserCount, "Invalid index");

        return pubSaleUserInfoFromAddress(pubUserIDs[index]);
    }

    function pubSaleUserInfoFromAddress(address userAddress)
        public
        view
        returns (
            uint256 ethAmount,
            uint256 tbirdAmount,
            address polygonWalletAddress
        )
    {
        require(pubUserExists(userAddress), "Not exists");

        User memory user = pubUsers[userAddress];

        ethAmount = user.ethAmount;
        tbirdAmount = user.tbirdAmount;
        polygonWalletAddress = user.polygonWalletAddress;
    }

    function estimateAmount(uint256 ethAmount, uint256 price)
        public
        view
        returns (uint256, uint256)
    {
        uint256 ethPrice = getETHPrice();
        uint256 usdAmount = ethAmount.mul(ethPrice).div(1e20);
        uint256 tbirdAmount = usdAmount.mul(1e9).div(price);

        return (usdAmount, tbirdAmount);
    }

    function getETHPrice() public view returns (uint256) {
        (
            uint80 roundID,
            int256 price,
            uint256 startedAt,
            uint256 timeStamp,
            uint80 answeredInRound
        ) = priceFeedETH.latestRoundData();

        return uint256(price);
    }

    function checkPrivWhiteList(address userAddress)
        public
        view
        returns (bool)
    {
        return true;    //allowed all
        // if (privWhiteList[userAddress]) return true;

        // return false;
    }

    function checkPubWhiteList(address userAddress) public view returns (bool) {
        return true;    //allowed all
        // if (pubWhiteList[userAddress]) return true;

        // return false;
    }

    function setTime(
        uint16 year,
        uint8 month,
        uint8 day,
        uint8 hour,
        uint8 minute,
        uint8 second,
        uint8 flag
    ) public onlyOwner {
        uint256 timestamp = toTimestamp(year, month, day, hour, minute, second);

        if (flag == 0) privPresaleStartTime = timestamp;
        else if (flag == 1) privPresaleEndTime = timestamp;
        else if (flag == 2) pubPresaleStartTime = timestamp;
        else if (flag == 3) pubPresaleEndTime = timestamp;
    }

    function setPrivPresaleCap(uint256 cap) public onlyOwner {
        privPresaleCap = cap;
    }

    function setPubPresaleCap(uint256 cap) public onlyOwner {
        pubPresaleCap = cap;
    }

    function setPrivPresaleMinLimit(uint256 _privPresaleMinLimit)
        public
        onlyOwner
    {
        privPresaleMinLimit = _privPresaleMinLimit;
    }

    function setPubPresaleMinLimit(uint256 _pubPresaleMinLimit)
        public
        onlyOwner
    {
        pubPresaleMinLimit = _pubPresaleMinLimit;
    }

    function addPrivWhiteList(address userAddress) public onlyOwner {
        require(checkPrivWhiteList(userAddress) != true, "Already exists");
        privWhiteList[userAddress] = true;
    }

    function removePrivWhiteList(address userAddress) public onlyOwner {
        require(checkPrivWhiteList(userAddress) == true, "No exist.");
        require(privUserExists(userAddress) == false, "Already purchased");
        privWhiteList[userAddress] = false;
    }

    function addPubWhiteList(address userAddress) public onlyOwner {
        require(checkPubWhiteList(userAddress) != true, "Already exists");
        pubWhiteList[userAddress] = true;
    }

    function removePubWhiteList(address userAddress) public onlyOwner {
        require(checkPubWhiteList(userAddress) == true, "No exist.");
        require(pubUserExists(userAddress) == false, "Already purchased");
        pubWhiteList[userAddress] = false;
    }

    function setServiceWallet(address _serviceWallet) public onlyOwner {
        serviceWallet = _serviceWallet;
    }

    function withdraw() public payable onlyOwner {
        address payable wallet = address(uint160(serviceWallet));
        uint256 amount = address(this).balance;
        wallet.transfer(amount);
    }

    /**
     * Utils
     */
    //////////////////////////////////////////////////////////////////

    function isLeapYear(uint16 year) private pure returns (bool) {
        if (year % 4 != 0) {
            return false;
        }
        if (year % 100 != 0) {
            return true;
        }
        if (year % 400 != 0) {
            return false;
        }
        return true;
    }

    function toTimestamp(
        uint16 year,
        uint8 month,
        uint8 day
    ) private pure returns (uint256 timestamp) {
        return toTimestamp(year, month, day, 0, 0, 0);
    }

    function toTimestamp(
        uint16 year,
        uint8 month,
        uint8 day,
        uint8 hour,
        uint8 minute,
        uint8 second
    ) private pure returns (uint256 timestamp) {
        uint32 DAY_IN_SECONDS = 86400;
        uint32 YEAR_IN_SECONDS = 31536000;
        uint32 LEAP_YEAR_IN_SECONDS = 31622400;

        uint32 HOUR_IN_SECONDS = 3600;
        uint32 MINUTE_IN_SECONDS = 60;

        uint16 ORIGIN_YEAR = 1970;

        uint16 i;

        // Year
        for (i = ORIGIN_YEAR; i < year; i++) {
            if (isLeapYear(i)) {
                timestamp += LEAP_YEAR_IN_SECONDS;
            } else {
                timestamp += YEAR_IN_SECONDS;
            }
        }

        // Month
        uint8[12] memory monthDayCounts;
        monthDayCounts[0] = 31;
        if (isLeapYear(year)) {
            monthDayCounts[1] = 29;
        } else {
            monthDayCounts[1] = 28;
        }
        monthDayCounts[2] = 31;
        monthDayCounts[3] = 30;
        monthDayCounts[4] = 31;
        monthDayCounts[5] = 30;
        monthDayCounts[6] = 31;
        monthDayCounts[7] = 31;
        monthDayCounts[8] = 30;
        monthDayCounts[9] = 31;
        monthDayCounts[10] = 30;
        monthDayCounts[11] = 31;

        for (i = 1; i < month; i++) {
            timestamp += DAY_IN_SECONDS * monthDayCounts[i - 1];
        }

        // Day
        timestamp += DAY_IN_SECONDS * (day - 1);

        // Hour
        timestamp += HOUR_IN_SECONDS * (hour);

        // Minute
        timestamp += MINUTE_IN_SECONDS * (minute);

        // Second
        timestamp += second;

        return timestamp;
    }
}