Contract 0x3d3121D2aeDff5e11E390027331CB544Bc3D2C59

 

Contract Overview

Balance:
0 FTM

FTM Value:
$0.00

Token:
Txn Hash Method
Block
From
To
Value [Txn Fee]
0x0a40839e1d1f762fa6e0247226bb4236177169566288b5d1d4427a0cc8761be0Approve480952282022-09-30 14:22:5123 hrs 38 mins ago0xdc879e69f8c7a2737ee599cf53d2c6d8d59e825c IN  0x3d3121d2aedff5e11e390027331cb544bc3d2c590 FTM0.00244785
0x02967e86770dd890e37d257ad1511298ace1b6794ca3fd30a84a9e85461d9c8fApprove474387022022-09-21 22:36:199 days 15 hrs ago0xfa0350575744d93c426d0becd8c6234c784995e8 IN  0x3d3121d2aedff5e11e390027331cb544bc3d2c590 FTM0.411341383244
0x6727d8e96db04a448687ccde3d1528e55eaff6a013d457cf711bd1e8f27e2f3cApprove474386892022-09-21 22:35:599 days 15 hrs ago0xfa0350575744d93c426d0becd8c6234c784995e8 IN  0x3d3121d2aedff5e11e390027331cb544bc3d2c590 FTM0.411341383244
0x6504d927d234b8dd7ef47b1fd41665e41deb0edf62d6ccb0fa0ffe8070352a8aApprove459769532022-08-30 4:29:5832 days 9 hrs ago0x58f6767aeafcf49be0610c2f09e998fa36bd47ff IN  0x3d3121d2aedff5e11e390027331cb544bc3d2c590 FTM0.000136137494
0x40a0bb6daa7f6ea7dd32a7879d2e8db5e0a0d0900d7ce35cc9a54fb617c9e3fbApprove446263142022-08-10 18:07:1651 days 19 hrs ago0x6b85cb5e8af033725a0a808dfa7efcc9d84dfaa1 IN  0x3d3121d2aedff5e11e390027331cb544bc3d2c590 FTM0.000184081141
0xe5e5e5ceefac6ffcd33f57fe0ae86544c60d7b23f2401b992468318899c4c6f7Approve444837602022-08-08 15:33:5653 days 22 hrs ago0xf0b080f40b276f5fcfa28763fabcaf20c68ceeef IN  0x3d3121d2aedff5e11e390027331cb544bc3d2c590 FTM0.000480351017
0x83ef2a722bd0d68f5d6ba2d2b2b5cf7e4f9366824e6fae84e5bcdcf83347d424Approve444837492022-08-08 15:33:4353 days 22 hrs ago0xf0b080f40b276f5fcfa28763fabcaf20c68ceeef IN  0x3d3121d2aedff5e11e390027331cb544bc3d2c590 FTM0.000480351017
0x3719d14c749abf2a33cc698fa5ced4314ccae952b232960a4371e60c699fe51fApprove444837362022-08-08 15:33:2953 days 22 hrs ago0xf0b080f40b276f5fcfa28763fabcaf20c68ceeef IN  0x3d3121d2aedff5e11e390027331cb544bc3d2c590 FTM0.000431941967
0x040af0affaa6071d70ab0b50a9e7216e7a776debe1c052f588c8704587e7c7d4Transfer424958072022-07-11 1:27:4282 days 12 hrs ago0x0e796a577ba066468d9edaab8b5843d72e3b447a IN  0x3d3121d2aedff5e11e390027331cb544bc3d2c590 FTM0.120469279752
0x833d820eda0e13b7c37f410383be323ea9003a6a690169ac7ffbd4bb470bb0c5Approve421598642022-07-06 15:29:4886 days 22 hrs ago0x208ba950ceae456d5b7a5aaf4d1298a8603910a1 IN  0x3d3121d2aedff5e11e390027331cb544bc3d2c590 FTM0.000120090164
0xeab18d193c33cc0be250bd3205224a370ea71d714e1b38d544b3d65327ac21d4Approve390422792022-05-25 17:39:05128 days 20 hrs ago0x9177eb417cd0f2ccd2662e1879af1c67e1d2779c IN  0x3d3121d2aedff5e11e390027331cb544bc3d2c590 FTM0.00138401106
0x93b64632fb5378399fe28ef69fd37bcc2ee1abf9b54caa78de966d8684c9d563Approve390421282022-05-25 17:35:29128 days 20 hrs ago0x9177eb417cd0f2ccd2662e1879af1c67e1d2779c IN  0x3d3121d2aedff5e11e390027331cb544bc3d2c590 FTM0.001337411923
0xcdeaf12384e33504f496ef2e73cc74606571ef234bb019307245cd5a85cd8559Approve388998402022-05-23 19:17:04130 days 18 hrs ago0x8ffaa09a58fc83d4d68a597f845309da680be006 IN  0x3d3121d2aedff5e11e390027331cb544bc3d2c590 FTM0.009705879045
0x337aab6780ad18b7af2b00ae1523098223c4c53e32907b4b8289d3037a66e8dfApprove388935122022-05-23 17:02:57130 days 20 hrs ago0x99d1441dd677994d30f45444760c30c43c520a48 IN  0x3d3121d2aedff5e11e390027331cb544bc3d2c590 FTM0.003749238816
0xa220c7b0fb1b57672cc472fccfdfd2e2cb2ef81f6a35145ee5c94ae78e27ad85Approve382836342022-05-15 8:56:28139 days 5 hrs ago0x1fb4820c368efa3282e696ca9aaed9c3cade2340 IN  0x3d3121d2aedff5e11e390027331cb544bc3d2c590 FTM0.080457100676
0x1e6ed9fd5bfbb8494c4130136e22adb81821d6a163240a741db9c8f28795e274Approve378700102022-05-08 23:54:46145 days 14 hrs ago0xe184b6b089a486053b28a6918cee8197987dd867 IN  0x3d3121d2aedff5e11e390027331cb544bc3d2c590 FTM0.006015594644
0x7e96976d3966d3c944b9b151c01dee3ea3c0973d676d93949ee9b8634b860f6eApprove378700012022-05-08 23:54:37145 days 14 hrs ago0xe184b6b089a486053b28a6918cee8197987dd867 IN  0x3d3121d2aedff5e11e390027331cb544bc3d2c590 FTM0.005976498958
0xb06ea34b7647c4871faf326f40ee0616e2f3371d124a0a14729eb91501a0a428Approve371352282022-04-28 9:54:07156 days 4 hrs ago0x60ed561867184086462b1df2f37b2ddd3a5bbe93 IN  0x3d3121d2aedff5e11e390027331cb544bc3d2c590 FTM0.003348457941
0x76763b6611dc48a56868619ef56583f189eec161d18752896251c845b70f7009Approve371348442022-04-28 9:47:46156 days 4 hrs ago0x60ed561867184086462b1df2f37b2ddd3a5bbe93 IN  0x3d3121d2aedff5e11e390027331cb544bc3d2c590 FTM0.003783365861
0xe808aecf7caf50e989f8dd70ad350be9e5f3c904d9528bcf282b26a8dbbac649Approve371347602022-04-28 9:46:24156 days 4 hrs ago0x60ed561867184086462b1df2f37b2ddd3a5bbe93 IN  0x3d3121d2aedff5e11e390027331cb544bc3d2c590 FTM0.003762885933
0xac095b07d27117f461729496109a9121f371600daa5d0022dd1bc15f09d5eb57Approve370439202022-04-27 3:53:21157 days 10 hrs ago0x501996c8d7cd5e083c9b26808f3b6b7be91c5102 IN  0x3d3121d2aedff5e11e390027331cb544bc3d2c590 FTM0.004732365381
0x78152cdc259f4fb1f74c7b9a3e2d865b80267fde7c909aa21e934a34cb9537b6Approve370438872022-04-27 3:52:47157 days 10 hrs ago0x501996c8d7cd5e083c9b26808f3b6b7be91c5102 IN  0x3d3121d2aedff5e11e390027331cb544bc3d2c590 FTM0.00276842443
0x78e9b1aa7a49fc5115cc8a50235547118822f9f60338615e9a15138a26676730Approve370438242022-04-27 3:51:36157 days 10 hrs ago0x501996c8d7cd5e083c9b26808f3b6b7be91c5102 IN  0x3d3121d2aedff5e11e390027331cb544bc3d2c590 FTM0.00276842443
0xad5e3a334024adf7c4a67f48e65abd15f6db625913d0cc07bd5bb7e7a8542aa8Approve367842772022-04-23 14:01:25161 days ago0x2f8f469d98d45b33b66d83d3ad4d5020d8bb2618 IN  0x3d3121d2aedff5e11e390027331cb544bc3d2c590 FTM0.00329449476
0x448104b5d6980140cc1e03f76aeebb063bf41d9e5554051f0606b219fce6e15cApprove364050722022-04-18 22:57:25165 days 15 hrs ago0xeb17fff415aa31a1a4e710f7d010c42931bce002 IN  0x3d3121d2aedff5e11e390027331cb544bc3d2c590 FTM0.004190991129
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Latest 25 internal transaction
Parent Txn Hash Block From To Value
0x14abdb6ccfa4b458992f8a74355a66e5f0f08de627805f8d56c243781a3bbe7c462179342022-09-02 18:09:1028 days 19 hrs ago 0x3d3121d2aedff5e11e390027331cb544bc3d2c59 SpookySwap: Router0.086791265819648888 FTM
0x14abdb6ccfa4b458992f8a74355a66e5f0f08de627805f8d56c243781a3bbe7c462179342022-09-02 18:09:1028 days 19 hrs ago 0x3d3121d2aedff5e11e390027331cb544bc3d2c590x8613ca858e22b57d37eb3e818d4e924c2c9bceb30.021697816454912222 FTM
0x14abdb6ccfa4b458992f8a74355a66e5f0f08de627805f8d56c243781a3bbe7c462179342022-09-02 18:09:1028 days 19 hrs ago SpookySwap: Router 0x3d3121d2aedff5e11e390027331cb544bc3d2c590.10848908227456111 FTM
0x063db455d8112dfa1fd3deb419d2199db15ab49d8f7c4d6d69ae9f91698d919d459769272022-08-30 4:29:2932 days 9 hrs ago 0x3d3121d2aedff5e11e390027331cb544bc3d2c59 SpookySwap: Router0.086811313996199588 FTM
0x063db455d8112dfa1fd3deb419d2199db15ab49d8f7c4d6d69ae9f91698d919d459769272022-08-30 4:29:2932 days 9 hrs ago 0x3d3121d2aedff5e11e390027331cb544bc3d2c590x8613ca858e22b57d37eb3e818d4e924c2c9bceb30.021702828499049896 FTM
0x063db455d8112dfa1fd3deb419d2199db15ab49d8f7c4d6d69ae9f91698d919d459769272022-08-30 4:29:2932 days 9 hrs ago SpookySwap: Router 0x3d3121d2aedff5e11e390027331cb544bc3d2c590.108514142495249484 FTM
0x3cdda16e4644e91a23293ce56555ae40a17c22baaaaaaadf3d02c28383f47026425947852022-07-12 12:19:0881 days 1 hr ago 0x3d3121d2aedff5e11e390027331cb544bc3d2c59 SpookySwap: Router0.086831370974136694 FTM
0x3cdda16e4644e91a23293ce56555ae40a17c22baaaaaaadf3d02c28383f47026425947852022-07-12 12:19:0881 days 1 hr ago 0x3d3121d2aedff5e11e390027331cb544bc3d2c590x8613ca858e22b57d37eb3e818d4e924c2c9bceb30.021707842743534173 FTM
0x3cdda16e4644e91a23293ce56555ae40a17c22baaaaaaadf3d02c28383f47026425947852022-07-12 12:19:0881 days 1 hr ago SpookySwap: Router 0x3d3121d2aedff5e11e390027331cb544bc3d2c590.108539213717670867 FTM
0x040af0affaa6071d70ab0b50a9e7216e7a776debe1c052f588c8704587e7c7d4424958072022-07-11 1:27:4282 days 12 hrs ago 0x3d3121d2aedff5e11e390027331cb544bc3d2c59 SpookySwap: Router0.086851436759155782 FTM
0x040af0affaa6071d70ab0b50a9e7216e7a776debe1c052f588c8704587e7c7d4424958072022-07-11 1:27:4282 days 12 hrs ago 0x3d3121d2aedff5e11e390027331cb544bc3d2c590x8613ca858e22b57d37eb3e818d4e924c2c9bceb30.021712859189788945 FTM
0x040af0affaa6071d70ab0b50a9e7216e7a776debe1c052f588c8704587e7c7d4424958072022-07-11 1:27:4282 days 12 hrs ago SpookySwap: Router 0x3d3121d2aedff5e11e390027331cb544bc3d2c590.108564295948944727 FTM
0xee66727dbc1d72e3c8b0ae9a5cc7665dbd5588d91e4bfe57152603dda6d4bcd1421599282022-07-06 15:31:0986 days 22 hrs ago 0x3d3121d2aedff5e11e390027331cb544bc3d2c59 SpookySwap: Router0.087615983974946052 FTM
0xee66727dbc1d72e3c8b0ae9a5cc7665dbd5588d91e4bfe57152603dda6d4bcd1421599282022-07-06 15:31:0986 days 22 hrs ago 0x3d3121d2aedff5e11e390027331cb544bc3d2c590x8613ca858e22b57d37eb3e818d4e924c2c9bceb30.021903995993736513 FTM
0xee66727dbc1d72e3c8b0ae9a5cc7665dbd5588d91e4bfe57152603dda6d4bcd1421599282022-07-06 15:31:0986 days 22 hrs ago SpookySwap: Router 0x3d3121d2aedff5e11e390027331cb544bc3d2c590.109519979968682565 FTM
0x7f76f1a2c418fdf65a26dc2f567c7097ba808483cf220ffe626a7513e1b444c7420222922022-07-04 20:28:3188 days 17 hrs ago 0x3d3121d2aedff5e11e390027331cb544bc3d2c59 SpookySwap: Router0.087808482202776219 FTM
0x7f76f1a2c418fdf65a26dc2f567c7097ba808483cf220ffe626a7513e1b444c7420222922022-07-04 20:28:3188 days 17 hrs ago 0x3d3121d2aedff5e11e390027331cb544bc3d2c590x8613ca858e22b57d37eb3e818d4e924c2c9bceb30.021952120550694054 FTM
0x7f76f1a2c418fdf65a26dc2f567c7097ba808483cf220ffe626a7513e1b444c7420222922022-07-04 20:28:3188 days 17 hrs ago SpookySwap: Router 0x3d3121d2aedff5e11e390027331cb544bc3d2c590.109760602753470273 FTM
0x0d9e0cc82bc2e70a179fa02515bc525ad544d36854cd2d839c8727ae23c69a0c395249102022-06-01 7:05:56122 days 6 hrs ago 0x3d3121d2aedff5e11e390027331cb544bc3d2c59 SpookySwap: Router0.087828893451944291 FTM
0x0d9e0cc82bc2e70a179fa02515bc525ad544d36854cd2d839c8727ae23c69a0c395249102022-06-01 7:05:56122 days 6 hrs ago 0x3d3121d2aedff5e11e390027331cb544bc3d2c590x8613ca858e22b57d37eb3e818d4e924c2c9bceb30.021957223362986072 FTM
0x0d9e0cc82bc2e70a179fa02515bc525ad544d36854cd2d839c8727ae23c69a0c395249102022-06-01 7:05:56122 days 6 hrs ago SpookySwap: Router 0x3d3121d2aedff5e11e390027331cb544bc3d2c590.109786116814930363 FTM
0xed635f72952e64a7da785d8dac94ea7a1bba6954d1d1c88206985eadfb4b91f0394992302022-05-31 23:06:41122 days 14 hrs ago 0x3d3121d2aedff5e11e390027331cb544bc3d2c59 SpookySwap: Router0.087849313718498972 FTM
0xed635f72952e64a7da785d8dac94ea7a1bba6954d1d1c88206985eadfb4b91f0394992302022-05-31 23:06:41122 days 14 hrs ago 0x3d3121d2aedff5e11e390027331cb544bc3d2c590x8613ca858e22b57d37eb3e818d4e924c2c9bceb30.021962328429624742 FTM
0xed635f72952e64a7da785d8dac94ea7a1bba6954d1d1c88206985eadfb4b91f0394992302022-05-31 23:06:41122 days 14 hrs ago SpookySwap: Router 0x3d3121d2aedff5e11e390027331cb544bc3d2c590.109811642148123714 FTM
0x91933753d4d9d20cec7a9b5f6e841748d65754b5399cc2b25e7153422f75b8cb388935492022-05-23 17:03:34130 days 20 hrs ago 0x3d3121d2aedff5e11e390027331cb544bc3d2c59 SpookySwap: Router0.08786884995586858 FTM
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Contract Source Code Verified (Exact Match)

Contract Name:
Waterfall

Compiler Version
v0.6.12+commit.27d51765

Optimization Enabled:
No with 200 runs

Other Settings:
default evmVersion, None license

Contract Source Code (Solidity)

/**
 *Submitted for verification at FtmScan.com on 2022-02-09
*/

/**
 *Submitted for verification at FtmScan.com on 2022-01-10
*/

/**
 *Submitted for verification at FtmScan.com on 2022-01-06
*/

/**
 *Submitted for verification at FtmScan.com on 2021-12-12
*/

// SPDX-License-Identifier: UNLICENSED

/**
 * @title SafeBEP20
 * @dev Wrappers around BEP20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeBEP20 for IBEP20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeBEP20 {
    using SafeMath for uint256;
    using Address for address;

    function safeTransfer(IBEP20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(IBEP20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IBEP20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(IBEP20 token, address spender, uint256 value) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        // solhint-disable-next-line max-line-length
        require((value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeBEP20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(IBEP20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender).add(value);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(IBEP20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeBEP20: decreased allowance below zero");
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IBEP20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeBEP20: low-level call failed");
        if (returndata.length > 0) { // Return data is optional
            // solhint-disable-next-line max-line-length
            require(abi.decode(returndata, (bool)), "SafeBEP20: BEP20 operation did not succeed");
        }
    }
}

pragma solidity 0.6.12;


// 
/*
 * @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;
    }
}

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

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

    /**
     * @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;
    }
}

// 
interface IBEP20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

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

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

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

    /**
     * @dev Returns the bep token owner.
     */
    function getOwner() external view returns (address);

    /**
     * @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);
}

// 
/**
 * @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, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        uint256 c = a + b;
        if (c < a) return (false, 0);
        return (true, c);
    }

    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b > a) return (false, 0);
        return (true, a - b);
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    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);
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a / b);
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a % b);
    }

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

    /**
     * @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) {
        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, reverting 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) {
        require(b > 0, "SafeMath: division by zero");
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting 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) {
        require(b > 0, "SafeMath: modulo by zero");
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * 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);
        return a - b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryDiv}.
     *
     * 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);
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * 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;
    }
}

// 
/**
 * @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
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly { size := extcodesize(account) }
        return size > 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");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (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");

        // solhint-disable-next-line avoid-low-level-calls
        (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");

        // solhint-disable-next-line avoid-low-level-calls
        (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");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private 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

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// 
/**
 * @dev Implementation of the {IBEP20} 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 {BEP20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-BEP20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin guidelines: functions revert instead
 * of returning `false` on failure. This behavior is nonetheless conventional
 * and does not conflict with the expectations of BEP20 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 {IBEP20-approve}.
 */
contract BEP20 is Context, IBEP20, Ownable {
    using SafeMath for uint256;
    using Address for address;

    mapping(address => uint256) private _balances;

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

    uint256 private _totalSupply;

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

    uint256 constant MAXSUPPLY = 80000 ether;

    /**
     * @dev Sets the values for {name} and {symbol}, initializes {decimals} with
     * a default value of 18.
     *
     * To select a different value for {decimals}, use {_setupDecimals}.
     *
     * All three of these values are immutable: they can only be set once during
     * construction.
     */
    constructor(string memory name, string memory symbol) public {
        _name = name;
        _symbol = symbol;
        _decimals = 18;
    }

    /**
     * @dev Returns the bep token owner.
     */
    function getOwner() external override view returns (address) {
        return owner();
    }

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

    /**
     * @dev Returns the token decimals.
     */
    function decimals() public override view returns (uint8) {
        return _decimals;
    }

    /**
     * @dev Returns the token symbol.
     */
    function symbol() public override view returns (string memory) {
        return _symbol;
    }

    /**
     * @dev See {BEP20-totalSupply}.
     */
    function totalSupply() public override view returns (uint256) {
        return _totalSupply;
    }

    function maxSupply() public pure returns (uint256) {
        return MAXSUPPLY;
    }


    /**
     * @dev See {BEP20-balanceOf}.
     */
    function balanceOf(address account) public override view returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {BEP20-transfer}.
     *
     * Requirements:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address recipient, uint256 amount) public override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    /**
     * @dev See {BEP20-allowance}.
     */
    function allowance(address owner, address spender) public override view returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {BEP20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    /**
     * @dev See {BEP20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {BEP20};
     *
     * Requirements:
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for `sender`'s tokens of at least
     * `amount`.
     */
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(
            sender,
            _msgSender(),
            _allowances[sender][_msgSender()].sub(amount, "BEP20: transfer amount exceeds allowance")
        );
        return true;
    }

    /**
     * @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 {BEP20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(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 {BEP20-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 returns (bool) {
        _approve(
            _msgSender(),
            spender,
            _allowances[_msgSender()][spender].sub(subtractedValue, "BEP20: decreased allowance below zero")
        );
        return true;
    }

    /**
     * @dev Creates `amount` tokens and assigns them to `msg.sender`, increasing
     * the total supply.
     *
     * Requirements
     *
     * - `msg.sender` must be the token owner
     */
    function mint(uint256 amount) public onlyOwner returns (bool) {
        _mint(_msgSender(), amount);
        return true;
    }

    /**
     * @dev Moves tokens `amount` from `sender` to `recipient`.
     *
     * This is 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:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    function _transfer(
        address sender,
        address recipient,
        uint256 amount
    ) internal virtual {
        require(sender != address(0), "BEP20: transfer from the zero address");
        require(recipient != address(0), "BEP20: transfer to the zero address");

        _balances[sender] = _balances[sender].sub(amount, "BEP20: transfer amount exceeds balance");
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, 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
     *
     * - `to` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal {
        require(account != address(0), "BEP20: mint to the zero address");
        require(_totalSupply.add(amount) <= MAXSUPPLY, "Max supply reached");

        _totalSupply = _totalSupply.add(amount);
        _balances[account] = _balances[account].add(amount);
        emit Transfer(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 {
        require(account != address(0), "BEP20: burn from the zero address");

        _balances[account] = _balances[account].sub(amount, "BEP20: burn amount exceeds balance");
        _totalSupply = _totalSupply.sub(amount);
        emit Transfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
     *
     * This is 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 {
        require(owner != address(0), "BEP20: approve from the zero address");
        require(spender != address(0), "BEP20: approve to the zero address");

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

    /**
     * @dev Destroys `amount` tokens from `account`.`amount` is then deducted
     * from the caller's allowance.
     *
     * See {_burn} and {_approve}.
     */
    function _burnFrom(address account, uint256 amount) internal {
        _burn(account, amount);
        _approve(
            account,
            _msgSender(),
            _allowances[account][_msgSender()].sub(amount, "BEP20: burn amount exceeds allowance")
        );
    }
}

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;
}

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 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;
}

/**
 * @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 pershieldtage 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 () internal {
        _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 make 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;
    }
}

// Waterfall Token.

contract Waterfall is BEP20 {
    
    // Transfer tax rate in basis points. (default 5%)
    uint16 public transferTaxRate = 500;
    
    // Burn Fee, in percent of transferTaxRate.
    uint16 public burnFee = 20;
    
    // Liq Fee, in percent of transferTaxRate.
    uint16 public liqFee = 100 - burnFee;
    
    // Max transfer tax rate: 20%.
    uint16 public constant maxTaxRate = 2000;
    
    // Fee address
    address payable public constant feeAddr = 0x8613Ca858E22B57D37eb3E818D4e924C2c9BcEb3;
    
    // Burn address
    address public constant burnAddr = 0x000000000000000000000000000000000000dEaD;

    // Contract address is excluded from tax, like Presale Cotract.
    mapping(address => bool) public noTaxRecipient;

    // Contract address is excluded from tax, like Presale Cotract.
    mapping(address => bool) public noTaxSender;

    // Max transfer amount rate in basis points. (Currently at 100% of total supply)
    uint16 public maxTransferAmountRate = 10000;
    
    // Addresses that excluded from antiWhale
    mapping(address => bool) private _excludedFromAntiWhale;
    
    // Automatic swap and liquify enabled
    bool public swapAndLiquifyEnabled = false;
    
    // Min amount to liquify. (default 10 Waterfalls)
    uint256 public minAmountToLiquify = 10 ether;
    
    // The swap router, modifiable.
    IUniswapV2Router02 public swapRouter;
    
    // The trading pair
    address public swapPair;
    
    // In swap and liquify
    bool private _inSwapAndLiquify;

    // The operator can call all functions except of minting Waterfall
    address private _operator;
    
    // The lpEarner address set to burn address to lock liquidity forever
    address constant public lpEarner = 0x000000000000000000000000000000000000dEaD;

    // Events
    event OperatorTransferred(address indexed previousOperator, address indexed newOperator);
    event TransferTaxRateUpdated(address indexed operator, uint256 previousRate, uint256 newRate);
    event BurnFeeUpdated(address indexed operator, uint256 previousRate, uint256 newRate);
    event MaxTransferAmountRateUpdated(address indexed operator, uint256 previousRate, uint256 newRate);
    event SwapAndLiquifyEnabledUpdated(address indexed operator, bool enabled);
    event MinAmountToLiquifyUpdated(address indexed operator, uint256 previousAmount, uint256 newAmount);
    event SwapRouterUpdated(address indexed operator, address indexed router, address indexed pair);
    event SetNoTaxSenderAddr(address indexed operator, address indexed noTaxSenderAddr, bool _value);
    event SetNoTaxRecipientAddr(address indexed operator, address indexed noTaxRecipientAddr, bool _value);
    event SwapAndLiquify(uint256 tokensSwapped, uint256 ethReceived, uint256 tokensIntoLiqudity);
    event SetExcludedFromAntiWhale(address indexed operator, address indexed accountAddress, bool excluded);

    modifier onlyOperator() {
        require(_operator == msg.sender, "operator: caller is not the operator");
        _;
    }

    modifier antiWhale(address sender, address recipient, uint256 amount) {
        if (maxTransferAmount() > 0) {
            if (
                _excludedFromAntiWhale[sender] == false
                && _excludedFromAntiWhale[recipient] == false
            ) {
                require(amount <= maxTransferAmount(), "WATERFALL::antiWhale: Transfer amount exceeds the maxTransferAmount");
            }
        }
        _;
    }

    modifier lockTheSwap {
        _inSwapAndLiquify = true;
        _;
        _inSwapAndLiquify = false;
    }

    modifier transferTaxFree {
        uint16 _transferTaxRate = transferTaxRate;
        transferTaxRate = 0;
        _;
        transferTaxRate = _transferTaxRate;
    }

    /**
     * @notice Constructs the WaterfallSwapToken contract.
     */
    constructor() public BEP20("Mymine", "MYMINE") {
        _operator = _msgSender();
        emit OperatorTransferred(address(0), _operator);

        _excludedFromAntiWhale[msg.sender] = true;
        _excludedFromAntiWhale[address(0)] = true;
        _excludedFromAntiWhale[address(this)] = true;
        _excludedFromAntiWhale[burnAddr] = true;
    }

    

    /// @notice Creates `_amount` token to `_to`. Must only be called by the owner (MasterChef).
    function mint(address _to, uint256 _amount) public onlyOwner {
        _mint(_to, _amount);
    }

    /// @dev overrides transfer function to meet tokenomics of WATERFALL
    function _transfer(address sender, address recipient, uint256 amount) internal virtual override antiWhale(sender, recipient, amount) {
        // swap and liquify
        if (
            swapAndLiquifyEnabled == true
            && _inSwapAndLiquify == false
            && address(swapRouter) != address(0)
            && swapPair != address(0)
            && sender != swapPair           // excludes Buying in FTM Liquidity
            && sender != owner()            // excludes owner (later MasterChef)
        ) { swapAndLiquify(); }

        if (recipient == burnAddr || sender == _operator ||
        noTaxRecipient[recipient] || noTaxSender[sender] ||
        transferTaxRate == 0 ) {

            super._transfer(sender, recipient, amount);  // transfer with no Tax
            
        } else {
            // default tax is 5% of every transfer
            uint256 taxAmount = amount.mul(transferTaxRate).div(10000);
            uint256 burnAmount = taxAmount.mul(burnFee).div(100);
            uint256 liqAmount = taxAmount.sub(burnAmount);
            require(taxAmount == burnAmount + liqAmount, "WATERFALL::transfer: Burn value invalid");

            // default 95% of transfer sent to recipient
            uint256 sendAmount = amount.sub(taxAmount);
            require(amount == sendAmount + taxAmount, "WATERFALL::transfer: Tax value invalid");

            super._transfer(sender, burnAddr, burnAmount);
            super._transfer(sender, address(this), liqAmount);
            super._transfer(sender, recipient, sendAmount);
        }
    }

    /// @dev Swap and liquify
    function swapAndLiquify() private lockTheSwap transferTaxFree {
        uint256 contractTokenBalance = balanceOf(address(this));
        uint256 maxTransferAmount = maxTransferAmount();
        contractTokenBalance = contractTokenBalance > maxTransferAmount ? maxTransferAmount : contractTokenBalance;

        if (contractTokenBalance >= minAmountToLiquify) {
            // only min amount to liquify
            uint256 liquifyAmount = minAmountToLiquify;

            // split the liquify amount into halves
            uint256 half = liquifyAmount.div(2);
            uint256 otherHalf = liquifyAmount.sub(half.mul(80).div(100));

            // swap tokens for ETH
            swapTokensForEth(half);
        
            // send 20% ETH to the Fee Wallet
            feeAddr.transfer(address(this).balance.mul(20).div(100));

            // how much ETH is in the token contract
            uint256 newBalance = address(this).balance;

            // add liquidity
            addLiquidity(otherHalf, newBalance);

            emit SwapAndLiquify(half, newBalance, otherHalf);
        }
    }

    /// @dev Swap tokens for eth
    function swapTokensForEth(uint256 tokenAmount) private {
        // generate the WATERFALL -> weth path for swapping
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = swapRouter.WETH();

        _approve(address(this), address(swapRouter), tokenAmount);

        // make the swap
        swapRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0, // accept any amount of ETH
            path,
            address(this),
            block.timestamp
        );
    }

    /// @dev Add liquidity
    function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
        // approve token transfer to cover all possible scenarios
        _approve(address(this), address(swapRouter), tokenAmount);

        // add the liquidity
        swapRouter.addLiquidityETH{value: ethAmount}(
            address(this),
            tokenAmount,
            0, // slippage is unavoidable
            0, // slippage is unavoidable
            lpEarner,
            block.timestamp
        );
    }

    /**
     * @dev Returns the max transfer amount.
     */
    function maxTransferAmount() public view returns (uint256) {
        return totalSupply().mul(maxTransferAmountRate).div(10000);
    }

    /**
     * @dev Returns the address is excluded from antiWhale or not.
     */
    function isExcludedFromAntiWhale(address _account) public view returns (bool) {
        return _excludedFromAntiWhale[_account];
    }

    // To receive FTM from swapRouter when swapping
    receive() external payable {}

    /**
     * @dev Update the transfer tax rate.
     * Can only be called by the current operator.
     */
    function updateTransferTaxRate(uint16 _transferTaxRate) public onlyOperator {
        require(_transferTaxRate <= maxTaxRate, "WATERFALL::updateTransferTaxRate: Transfer tax rate must not exceed the maximum rate.");
        emit TransferTaxRateUpdated(msg.sender, transferTaxRate, _transferTaxRate);
        transferTaxRate = _transferTaxRate;
    }

    /**
     * @dev Update the Burn Fee.
     * Can only be called by the current operator.
     */
    function updateBurnFee(uint16 _burnFee) public onlyOperator {
        require(_burnFee <= 100, "WATERFALL::updateBurnRate: Burn Fee must not exceed the maximum rate.");
        emit BurnFeeUpdated(msg.sender, burnFee, _burnFee);
        burnFee = _burnFee;
    }
    
    /**
     * @dev Update the max transfer amount rate.
     * Can only be called by the current operator.
     */
    function updateMaxTransferAmountRate(uint16 _maxTransferAmountRate) public onlyOperator {
        require(_maxTransferAmountRate <= 10000, "WATERFALL::updateMaxTransferAmountRate: Max transfer amount to High.");
        require(_maxTransferAmountRate >= 500, "WATERFALL::updateMaxTransferAmountRate: Min transfer amount to Low.");
        emit MaxTransferAmountRateUpdated(msg.sender, maxTransferAmountRate, _maxTransferAmountRate);
        maxTransferAmountRate = _maxTransferAmountRate;
    }

    /**
     * @dev Update the min amount to liquify.
     * Can only be called by the current operator.
     */
    function updateMinAmountToLiquify(uint256 _minAmount) public onlyOperator {
        emit MinAmountToLiquifyUpdated(msg.sender, minAmountToLiquify, _minAmount);
        minAmountToLiquify = _minAmount;
    }

    /**
     * @dev Exclude or include an address from antiWhale.
     * Can only be called by the current operator.
     */
    function setExcludedFromAntiWhale(address _account, bool _excluded) public onlyOperator {
        _excludedFromAntiWhale[_account] = _excluded;
        emit SetExcludedFromAntiWhale(msg.sender, _account, _excluded);
    }

    /**
     * @dev Update the swapAndLiquifyEnabled.
     * Can only be called by the current operator.
     */
    function updateSwapAndLiquifyEnabled(bool _enabled) public onlyOperator {
        emit SwapAndLiquifyEnabledUpdated(msg.sender, _enabled);
        swapAndLiquifyEnabled = _enabled;
    }

    /**
     * @dev Update the swap router.
     * Can only be called by the current operator.
     */
    function updateSwapRouter(address _router) public onlyOperator {
        require (address(swapRouter) == address(0), "Router already set");
        swapRouter = IUniswapV2Router02(_router);
        swapPair = IUniswapV2Factory(swapRouter.factory()).getPair(address(this), swapRouter.WETH());
        require(swapPair != address(0), "WATERFALL::updateSwapRouter: Invalid pair address.");
        emit SwapRouterUpdated(msg.sender, address(swapRouter), swapPair);
    }

    /**
     * @dev Update the no Tax Contract Address.
     * Can only be called by the current operator.
     */

    function setNoTaxSenderAddr(address _noTaxSenderAddr, bool _value) external onlyOperator {
        noTaxSender[_noTaxSenderAddr] = _value;
        emit SetNoTaxSenderAddr(msg.sender, _noTaxSenderAddr, _value);
    }

    function setNoTaxRecipientAddr(address _noTaxRecipientAddr, bool _value) external onlyOperator {
        noTaxRecipient[_noTaxRecipientAddr] = _value;
        emit SetNoTaxRecipientAddr(msg.sender, _noTaxRecipientAddr, _value);
    }



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

    /**
     * @dev Transfers operator of the contract to a new account (`newOperator`).
     * Can only be called by the current operator.
     */
    function transferOperator(address newOperator) public onlyOperator {
        require(newOperator != address(0), "WATERFALL::transferOperator: new operator is the zero address");
        emit OperatorTransferred(_operator, newOperator);
        _operator = newOperator;
    }

}


/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using SafeMath for uint256;
    using Address for address;

    function safeTransfer(
        IBEP20 token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(
        IBEP20 token,
        address from,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(
        IBEP20 token,
        address spender,
        uint256 value
    ) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        // solhint-disable-next-line max-line-length
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(
        IBEP20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender).add(value);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(
        IBEP20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender).sub(
            value,
            "SafeERC20: decreased allowance below zero"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IBEP20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        if (returndata.length > 0) {
            // Return data is optional
            // solhint-disable-next-line max-line-length
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

// MasterChef is the master of WATERFALL. He can make WATERFALL and he is a fair guy.
//
// Note that it's ownable and the owner wields tremendous power. The ownership
// will be transferred to a governance smart contract once WATERFALL is sufficiently
// distributed and the community can show to govern itself.
//
// Have fun reading it. Hopefully it's bug-free. God bless.
contract MasterChef is Ownable, ReentrancyGuard {
    using SafeMath for uint256;
    using SafeERC20 for IBEP20;

    // Info of each user.
    struct UserInfo {
        uint256 amount; // How many LP tokens the user has provided.
        uint256 rewardDebt; // Reward debt. See explanation below.
        //
        // We do some fancy math here. Basically, any point in time, the amount of WATERFALL
        // entitled to a user but is pending to be distributed is:
        //
        //   pending reward = (user.amount * pool.accWaterfallPerShare) - user.rewardDebt
        //
        // Whenever a user deposits or withdraws LP tokens to a pool. Here's what happens:
        //   1. The pool's `accWaterfallPerShare` (and `lastRewardBlock`) gets updated.
        //   2. User receives the pending reward sent to his/her address.
        //   3. User's `amount` gets updated.
        //   4. User's `rewardDebt` gets updated.
    }

    // Info of each pool.
    struct PoolInfo {
        IBEP20 lpToken; // Address of LP token contract.
        uint256 allocPoint; // How many allocation points assigned to this pool. WATERFALLs to distribute per second.
        uint256 lastRewardSecond; // Last second that WATERFALLs distribution occurs.
        uint256 accWaterfallPerShare; // Accumulated WATERFALLs per share, times 1e18. See below.
        uint16 depositFeeBP; // Deposit fee in basis points
        uint256 lpSupply;
    }

    // The WATERFALL TOKEN!
    Waterfall public waterfall;
    // Dev address.
    address public devaddr;
    // WATERFALL tokens created per second.
    uint256 public WaterfallPerSecond;
    // Deposit Fee address
    address public feeAddress;
    // Max emission rate.
    uint256 public constant MAX_EMISSION_RATE = 5 ether;

    // Info of each pool.
    PoolInfo[] public poolInfo;
    // Info of each user that stakes LP tokens.
    mapping(uint256 => mapping(address => UserInfo)) public userInfo;
    // Total allocation points. Must be the sum of all allocation points in all pools.
    uint256 public totalAllocPoint = 0;
    // The block timestamp when Waterfall mining starts.
    uint256 public startTime;

    event Deposit(address indexed user, uint256 indexed pid, uint256 amount);
    event Withdraw(address indexed user, uint256 indexed pid, uint256 amount);
    event EmergencyWithdraw(
        address indexed user,
        uint256 indexed pid,
        uint256 amount
    );
    event SetFeeAddress(address indexed user, address indexed newAddress);
    event SetDevAddress(address indexed user, address indexed newAddress);
    event UpdateEmissionRate(address indexed user, uint256 WaterfallPerSecond);
    event addPool(
        uint256 indexed pid,
        address lpToken,
        uint256 allocPoint,
        uint256 depositFeeBP
    );
    event setPool(
        uint256 indexed pid,
        address lpToken,
        uint256 allocPoint,
        uint256 depositFeeBP
    );
    event UpdateStartTime(uint256 newStartTime);

    constructor(
        Waterfall _waterfall,
        address _devaddr,
        address _feeAddress,
        uint256 _WaterfallPerSecond,
        uint256 _startTime
    ) public {
        waterfall = _waterfall;
        devaddr = _devaddr;
        feeAddress = _feeAddress;
        WaterfallPerSecond = _WaterfallPerSecond;
        startTime = _startTime;
    }

    function poolLength() external view returns (uint256) {
        return poolInfo.length;
    }

    mapping(IBEP20 => bool) public poolExistence;
    modifier nonDuplicated(IBEP20 _lpToken) {
        require(poolExistence[_lpToken] == false, "nonDuplicated: duplicated");
        _;
    }

    // Add a new lp to the pool. Can only be called by the owner.
    function add(
        uint256 _allocPoint,
        IBEP20 _lpToken,
        uint16 _depositFeeBP,
        bool _withUpdate
    ) external onlyOwner nonDuplicated(_lpToken) {
        // valid ERC20 token
        _lpToken.balanceOf(address(this));

        require(_depositFeeBP <= 400, "add: invalid deposit fee basis points");
        if (_withUpdate) {
            massUpdatePools();
        }
        uint256 lastRewardSecond = block.timestamp > startTime
            ? block.timestamp
            : startTime;
        totalAllocPoint = totalAllocPoint.add(_allocPoint);
        poolExistence[_lpToken] = true;
        poolInfo.push(
            PoolInfo({
                lpToken: _lpToken,
                allocPoint: _allocPoint,
                lastRewardSecond: lastRewardSecond,
                accWaterfallPerShare: 0,
                depositFeeBP: _depositFeeBP,
                lpSupply: 0
            })
        );

        emit addPool(
            poolInfo.length - 1,
            address(_lpToken),
            _allocPoint,
            _depositFeeBP
        );
    }

    // Update the given pool's Waterfall allocation point and deposit fee. Can only be called by the owner.
    function set(
        uint256 _pid,
        uint256 _allocPoint,
        uint16 _depositFeeBP,
        bool _withUpdate
    ) external onlyOwner {
        require(_depositFeeBP <= 400, "set: invalid deposit fee basis points");
        if (_withUpdate) {
            massUpdatePools();
        }
        totalAllocPoint = totalAllocPoint.sub(poolInfo[_pid].allocPoint).add(
            _allocPoint
        );
        poolInfo[_pid].allocPoint = _allocPoint;
        poolInfo[_pid].depositFeeBP = _depositFeeBP;

        emit setPool(
            _pid,
            address(poolInfo[_pid].lpToken),
            _allocPoint,
            _depositFeeBP
        );
    }

    // Return reward multiplier over the given _from to _to block.
    function getMultiplier(uint256 _from, uint256 _to)
        public
        pure
        returns (uint256)
    {
        return _to.sub(_from);
    }

    // View function to see pending waterfall on frontend.
    function pendingWaterfall(uint256 _pid, address _user)
        external
        view
        returns (uint256)
    {
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][_user];
        uint256 accWaterfallPerShare = pool.accWaterfallPerShare;
        if (
            block.timestamp > pool.lastRewardSecond &&
            pool.lpSupply != 0 &&
            totalAllocPoint > 0
        ) {
            uint256 multiplier = getMultiplier(
                pool.lastRewardSecond,
                block.timestamp
            );
            uint256 waterfallReward = multiplier
                .mul(WaterfallPerSecond)
                .mul(pool.allocPoint)
                .div(totalAllocPoint);
                uint256 devReward = waterfallReward.div(10);
                uint256 totalRewards = waterfall.totalSupply().add(devReward).add(
                waterfallReward
            );
                if (totalRewards > waterfall.maxSupply()) {
                waterfallReward = waterfall.maxSupply().sub(waterfall.totalSupply());
            }
            accWaterfallPerShare = accWaterfallPerShare.add(
                waterfallReward.mul(1e18).div(pool.lpSupply)
            );
        }
        return user.amount.mul(accWaterfallPerShare).div(1e18).sub(user.rewardDebt);
    }

    // Update reward variables for all pools. Be careful of gas spending!
    function massUpdatePools() public {
        uint256 length = poolInfo.length;
        for (uint256 pid = 0; pid < length; ++pid) {
            updatePool(pid);
        }
    }

    // Update reward variables of the given pool to be up-to-date.
    function updatePool(uint256 _pid) public {
        PoolInfo storage pool = poolInfo[_pid];
        if (block.timestamp <= pool.lastRewardSecond) {
            return;
        }
        if (pool.lpSupply == 0 || pool.allocPoint == 0) {
            pool.lastRewardSecond = block.timestamp;
            return;
        }
        uint256 multiplier = getMultiplier(
            pool.lastRewardSecond,
            block.timestamp
        );
        uint256 waterfallReward = multiplier
            .mul(WaterfallPerSecond)
            .mul(pool.allocPoint)
            .div(totalAllocPoint);

        uint256 devReward = waterfallReward.div(10);
        uint256 totalRewards = waterfall.totalSupply().add(devReward).add(
            waterfallReward
        );

        if (totalRewards <= waterfall.maxSupply()) {
            // mint as normal as not at maxSupply
            waterfall.mint(devaddr, waterfallReward.div(10));
            waterfall.mint(address(this), waterfallReward);
        } else {
            // mint the difference only to MC, update waterfallReward
            waterfallReward = waterfall.maxSupply().sub(waterfall.totalSupply());
            waterfall.mint(address(this), waterfallReward);
        }

        if (waterfallReward != 0) {
            // only calculate and update if waterfallReward is non 0
            pool.accWaterfallPerShare = pool.accWaterfallPerShare.add(
                waterfallReward.mul(1e18).div(pool.lpSupply)
            );
        }

        pool.lastRewardSecond = block.timestamp;
    }

    // Deposit LP tokens to MasterChef for Waterfall allocation.
    function deposit(uint256 _pid, uint256 _amount) external nonReentrant {
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][msg.sender];
        updatePool(_pid);
        if (user.amount > 0) {
            uint256 pending = user
                .amount
                .mul(pool.accWaterfallPerShare)
                .div(1e18)
                .sub(user.rewardDebt);
            if (pending > 0) {
                safeWaterfallTransfer(msg.sender, pending);
            }
        }
        if (_amount > 0) {
            uint256 balanceBefore = pool.lpToken.balanceOf(address(this));
            pool.lpToken.safeTransferFrom(
                address(msg.sender),
                address(this),
                _amount
            );
            _amount = pool.lpToken.balanceOf(address(this)).sub(balanceBefore);
            if (pool.depositFeeBP > 0) {
                uint256 depositFee = _amount.mul(pool.depositFeeBP).div(10000);
                pool.lpToken.safeTransfer(feeAddress, depositFee);
                user.amount = user.amount.add(_amount).sub(depositFee);
                pool.lpSupply = pool.lpSupply.add(_amount).sub(depositFee);
            } else {
                user.amount = user.amount.add(_amount);
                pool.lpSupply = pool.lpSupply.add(_amount);
            }
        }
        user.rewardDebt = user.amount.mul(pool.accWaterfallPerShare).div(1e18);
        emit Deposit(msg.sender, _pid, _amount);
    }

    // Withdraw LP tokens from MasterChef.
    function withdraw(uint256 _pid, uint256 _amount) external nonReentrant {
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][msg.sender];
        require(user.amount >= _amount, "withdraw: not good");
        updatePool(_pid);
        uint256 pending = user.amount.mul(pool.accWaterfallPerShare).div(1e18).sub(
            user.rewardDebt
        );
        if (pending > 0) {
            safeWaterfallTransfer(msg.sender, pending);
        }
        if (_amount > 0) {
            user.amount = user.amount.sub(_amount);
            pool.lpToken.safeTransfer(address(msg.sender), _amount);
            pool.lpSupply = pool.lpSupply.sub(_amount);
        }
        user.rewardDebt = user.amount.mul(pool.accWaterfallPerShare).div(1e18);
        emit Withdraw(msg.sender, _pid, _amount);
    }

    // Withdraw without caring about rewards. EMERGENCY ONLY.
    function emergencyWithdraw(uint256 _pid) external nonReentrant {
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][msg.sender];
        uint256 amount = user.amount;
        user.amount = 0;
        user.rewardDebt = 0;
        pool.lpToken.safeTransfer(address(msg.sender), amount);

        if (pool.lpSupply >= amount) {
            pool.lpSupply = pool.lpSupply.sub(amount);
        } else {
            pool.lpSupply = 0;
        }

        emit EmergencyWithdraw(msg.sender, _pid, amount);
    }

    // Safe Waterfall transfer function, just in case if rounding error causes pool to not have enough Waterfalls.
    function safeWaterfallTransfer(address _to, uint256 _amount) internal {
        uint256 waterfallBal = waterfall.balanceOf(address(this));
        bool transferSuccess = false;
        if (_amount > waterfallBal) {
            transferSuccess = waterfall.transfer(_to, waterfallBal);
        } else {
            transferSuccess = waterfall.transfer(_to, _amount);
        }
        require(transferSuccess, "safeWaterfallTransfer: transfer failed");
    }

    // Update dev address.
    function setDevAddress(address _devaddr) external {
        require(_devaddr != address(0), "!nonzero");
        require(msg.sender == devaddr, "dev: wut?");
        devaddr = _devaddr;
        emit SetDevAddress(msg.sender, _devaddr);
    }

    function setFeeAddress(address _feeAddress) external {
        require(msg.sender == feeAddress, "setFeeAddress: FORBIDDEN");
        require(_feeAddress != address(0), "!nonzero");
        feeAddress = _feeAddress;
        emit SetFeeAddress(msg.sender, _feeAddress);
    }

    //Pancake has to add hidden dummy pools inorder to alter the emission, here we make it simple and transparent to all.
    function updateEmissionRate(uint256 _WaterfallPerSecond) external onlyOwner {
        require(_WaterfallPerSecond <= MAX_EMISSION_RATE, "Emission too high");
        massUpdatePools();
        WaterfallPerSecond = _WaterfallPerSecond;
        emit UpdateEmissionRate(msg.sender, _WaterfallPerSecond);
    }

    // Only update before start of farm
    function updateStartTime(uint256 _newStartTime) external onlyOwner {
        require(
            block.timestamp < startTime,
            "cannot change start time if farm has already started"
        );
        require(
            block.timestamp < _newStartTime,
            "cannot set start time in the past"
        );
        uint256 length = poolInfo.length;
        for (uint256 pid = 0; pid < length; ++pid) {
            PoolInfo storage pool = poolInfo[pid];
            pool.lastRewardSecond = _newStartTime;
        }
        startTime = _newStartTime;

        emit UpdateStartTime(startTime);
    }
}

Contract Security Audit

Contract ABI

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Swarm Source

ipfs://bc1553b4dc7f34df01d03894a7af39d888c297e9ee3f27a59edc23b0259bb86d
Block Transaction Gas Used Reward
Age Block Fee Address BC Fee Address Voting Power Jailed Incoming
Validator ID :
0 FTM

Amount Staked
0

Amount Delegated
0

Staking Total
0

Staking Start Epoch
0

Staking Start Time
0

Proof of Importance
0

Origination Score
0

Validation Score
0

Active
0

Online
0

Downtime
0 s
Address Amount claimed Rewards Created On Epoch Created On
Block Uncle Number Difficulty Gas Used Reward
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