Contract 0x59745774ed5eff903e615f5a2282cae03484985a 4

 
Txn Hash Method
Block
From
To
Value [Txn Fee]
0x5efa80a7661d15b6ef6507f5989101e4f2327818eca6db0073f5fe580ab8bf03Approve590371412023-02-08 7:46:021 min ago0xeb463c4ad1f5562b18139dcb4c276eece2fdb559 IN Hop Protocol: HOP - ETH Token0 ETH0.00004526
0x0f5053d3542d27bb125dd315a019dac800201ca457613767ee2c79a9d58db18aApprove590369622023-02-08 7:45:152 mins ago0xefdddf2e63d3300b3bff68c608f9e43fb3fd25ab IN Hop Protocol: HOP - ETH Token0 ETH0.00004548
0xab3f632dd15d0e62079a4fdea594ff5849c2a2c65d925243880f1d9274066317Approve590368892023-02-08 7:44:562 mins ago0x211a26a3fc01b01b217b76c391902e42e3e1ee91 IN Hop Protocol: HOP - ETH Token0 ETH0.00004548
0x7f98351b177a3f9638c49e50dbe67802e0bf8ecc8c7c50ddf6207b6c2c27515fApprove590339482023-02-08 7:32:1415 mins ago0x111daacc42af2e2d475e829af617d235b1d12b29 IN Hop Protocol: HOP - ETH Token0 ETH0.00004551
0xa78847fbf1072417364211c66fe58045a0f11c9c4f1771f90b4c5520b1328282Approve590332582023-02-08 7:29:1318 mins ago0xf8139cc1435f84f95da0dd1aaa9beabc821297e7 IN Hop Protocol: HOP - ETH Token0 ETH0.00004522
0xa4d27751a1ce44da990f6a8c73392d372676906df8c01dfd2862204c15df081cApprove590312732023-02-08 7:20:3027 mins ago0x5a5a4c177d763e138217c324c6a5412e4d9fea9b IN Hop Protocol: HOP - ETH Token0 ETH0.00004539
0x01343aa22c94188f295def550e4ddb7fdc31778c077fe23fe0d0f898a050c314Approve590309402023-02-08 7:19:0328 mins ago0xca344178ff4d740c7227f97c56575c4879d3669c IN Hop Protocol: HOP - ETH Token0 ETH0.00004562
0x2f6f7cae705b97cdc7b4351052aef753d73b25bd40ccb2c565ba45680e781dafApprove590300842023-02-08 7:15:1532 mins ago0x33f580a02f44c9ff6a02913e2cd5468ffaee3147 IN Hop Protocol: HOP - ETH Token0 ETH0.00004322
0xf37322909ff11174fc084af06f40b97f869947e0016d1de065fc38c8ebf81a32Approve590300522023-02-08 7:15:0732 mins ago0xb141803cad1cd0dffd9c84baf688c10c25f3a573 IN Hop Protocol: HOP - ETH Token0 ETH0.00004343
0x370db02b64c418326073c85407efe07ff97b49e4aa5344c1791c150e82387bf8Approve590297932023-02-08 7:13:5933 mins ago0xd98df32e10930135c7c917a7a88bc0b32509fcad IN Hop Protocol: HOP - ETH Token0 ETH0.00004301
0x1f027bf42e742bf1dfda7b3291edc280cf873b6963760c81f34c9fb7aa3fcb44Approve590296862023-02-08 7:13:3134 mins ago0xcce524f0a33731ee49e4bc7c33addda9862d9dce IN Hop Protocol: HOP - ETH Token0 ETH0.00004301
0x75f3b2e5927850eba9a515b35ab449c73e9b8efa3109444181277a42a02588f4Approve590276322023-02-08 7:04:4343 mins ago0x0f83a90f8deb979e99b3dee42b62f6e34e8ed124 IN Hop Protocol: HOP - ETH Token0 ETH0.00004468
0xaec97ea840427216c10c5caa8f0e0ea9eded57f31a20376d55341af223f17f23Approve590251762023-02-08 6:54:0253 mins ago0x3d9fd503bd1fc62705ab230d94e42c755a65b64e IN Hop Protocol: HOP - ETH Token0 ETH0.000042
0x14e46faad55c32c23427c7a87b233baf1576ce0b84c0188c4da1e71289440d26Approve590248002023-02-08 6:52:2755 mins ago0x3ad865c0a5a13675524d738c504b9ac24f400387 IN Hop Protocol: HOP - ETH Token0 ETH0.00004496
0xbbe7dcc97df488ae17ccaaffb105d509245be3e4ef8ec4e461c8dfff7e7555b5Approve590204252023-02-08 6:32:561 hr 14 mins ago0xd246ac1a40d122567e0bb4b6444b7a275276bfdf IN Hop Protocol: HOP - ETH Token0 ETH0.0000413
0x3d80534f10c71109e28049749a927059ed6f8bd55c1b9cc7ce3066ee63397025Approve590192082023-02-08 6:27:281 hr 20 mins ago0xc6c70f7326738977cedf017c8b14430cd170bfcd IN Hop Protocol: HOP - ETH Token0 ETH0.00003779
0xc3b0a8524077d34c9e5287b7411638575738b0f190e197f232f29d6fec9bc4bfApprove590182842023-02-08 6:23:191 hr 24 mins ago0xb58825471ec6610a8d3628dcda1fb8428b04fce7 IN Hop Protocol: HOP - ETH Token0 ETH0.00003779
0x5ee3f364d250a45850a8377ddd1cb265caa80ab80ea88777de384e8bdc681a57Approve590161062023-02-08 6:13:391 hr 34 mins ago0x954457259ecbebf3e2f3285d61a948e1e9ba93d2 IN Hop Protocol: HOP - ETH Token0 ETH0.00003958
0x9960cb0f79e666b30a6b83d84f9c5a8734ad93bf875620da3be5db1e02ae6bcbApprove590160352023-02-08 6:13:201 hr 34 mins ago0x954457259ecbebf3e2f3285d61a948e1e9ba93d2 IN Hop Protocol: HOP - ETH Token0 ETH0.00003958
0xdaf81f8c04cccba7506f33568774fc0d1585fafb6561ab9f9b247e1d27247b56Approve590160212023-02-08 6:13:171 hr 34 mins ago0x954457259ecbebf3e2f3285d61a948e1e9ba93d2 IN Hop Protocol: HOP - ETH Token0 ETH0.00004157
0xb526944471ed67c3803193964828004b97869c941cc3efd7ad13ad7ce0d9f0eeApprove590151952023-02-08 6:09:351 hr 38 mins ago0x954457259ecbebf3e2f3285d61a948e1e9ba93d2 IN Hop Protocol: HOP - ETH Token0 ETH0.00004157
0x7ba4996207c139f00905a21ebf08c99b9d691c71dcf8df9fca40f4e3ae60118fApprove590143542023-02-08 6:05:531 hr 41 mins ago0x52a9c95c8d1571dd615d6e226c0d050c117a6b5f IN Hop Protocol: HOP - ETH Token0 ETH0.00004249
0xb1609781e90cc2499e533b3dfefb34f9a7271a763ebe4aec6f4cad6be371c219Approve590136562023-02-08 6:02:381 hr 45 mins ago0xd45625ae36f22e5c0e5103e4d62f511fba1fe3d2 IN Hop Protocol: HOP - ETH Token0 ETH0.00004628
0xa2519fdba94e5fa242f2d08f8c8cc34b58a9d3530d9d0e5377aef07e4d600dc6Approve590130872023-02-08 6:00:051 hr 47 mins ago0x29ce7699bf63fa78f7f2415eeec5f5b6e2895d7c IN Hop Protocol: HOP - ETH Token0 ETH0.00004319
0x02a6c28c6db962280c27d61f9663ac312ff3696a00e98af42123f50ca04ad2d4Approve590043712023-02-08 5:19:512 hrs 27 mins ago0x673f4cbb7db727f7eaafecbc29251f2318f6f5d8 IN Hop Protocol: HOP - ETH Token0 ETH0.00004634
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OVERVIEW

Hop is a scalable rollup-to-rollup general token bridge. It allows users to send tokens from one rollup or sidechain to another almost immediately without having to wait for the networks challenge period.

Latest 25 internal transaction
Parent Txn Hash Block From To Value
0xfbca18bc3f56f4092b4792b09188a098bd66f381fefd096d2d2b9a25030f88f9590371672023-02-08 7:46:091 min ago Hop Protocol: HOP - ETH Token Hop Protocol: ETH Liquidity Pool0 ETH
0xfbca18bc3f56f4092b4792b09188a098bd66f381fefd096d2d2b9a25030f88f9590371672023-02-08 7:46:091 min ago Hop Protocol: ETH Rewards ContractHop Protocol: HOP - ETH Token0 ETH
0x84614b299907cba2e24378048c9d4f0043e1d34ba62634d879c35325cb01d436590370632023-02-08 7:45:412 mins ago Hop Protocol: HOP - ETH Token Hop Protocol: ETH Liquidity Pool0 ETH
0x84614b299907cba2e24378048c9d4f0043e1d34ba62634d879c35325cb01d436590370632023-02-08 7:45:412 mins ago Hop Protocol: ETH Liquidity PoolHop Protocol: HOP - ETH Token0 ETH
0x84614b299907cba2e24378048c9d4f0043e1d34ba62634d879c35325cb01d436590370632023-02-08 7:45:412 mins ago Hop Protocol: ETH Liquidity PoolHop Protocol: HOP - ETH Token0 ETH
0x923b18c4b41805a50ee7ba594ee88c0bb0e5dc55d4c4a5b2f9b09145961296a9590369952023-02-08 7:45:242 mins ago Hop Protocol: HOP - ETH Token Hop Protocol: ETH Liquidity Pool0 ETH
0x923b18c4b41805a50ee7ba594ee88c0bb0e5dc55d4c4a5b2f9b09145961296a9590369952023-02-08 7:45:242 mins ago Hop Protocol: ETH Rewards ContractHop Protocol: HOP - ETH Token0 ETH
0x34cbafd02e799d76632d1080d598d31adb25f876defac27f8da0de3531d35a89590369302023-02-08 7:45:062 mins ago Hop Protocol: HOP - ETH Token Hop Protocol: ETH Liquidity Pool0 ETH
0x34cbafd02e799d76632d1080d598d31adb25f876defac27f8da0de3531d35a89590369302023-02-08 7:45:062 mins ago Hop Protocol: ETH Liquidity PoolHop Protocol: HOP - ETH Token0 ETH
0x34cbafd02e799d76632d1080d598d31adb25f876defac27f8da0de3531d35a89590369302023-02-08 7:45:062 mins ago Hop Protocol: ETH Liquidity PoolHop Protocol: HOP - ETH Token0 ETH
0x2b4d23b35b9ca7e2417832e67f332b6cf921da5cb416a8587e8a84c574a82f3b590369142023-02-08 7:45:022 mins ago Hop Protocol: HOP - ETH Token Hop Protocol: ETH Liquidity Pool0 ETH
0x2b4d23b35b9ca7e2417832e67f332b6cf921da5cb416a8587e8a84c574a82f3b590369142023-02-08 7:45:022 mins ago Hop Protocol: ETH Liquidity PoolHop Protocol: HOP - ETH Token0 ETH
0x2b4d23b35b9ca7e2417832e67f332b6cf921da5cb416a8587e8a84c574a82f3b590369142023-02-08 7:45:022 mins ago Hop Protocol: ETH Liquidity PoolHop Protocol: HOP - ETH Token0 ETH
0x2b4d23b35b9ca7e2417832e67f332b6cf921da5cb416a8587e8a84c574a82f3b590369142023-02-08 7:45:022 mins ago Hop Protocol: ETH Liquidity PoolHop Protocol: HOP - ETH Token0 ETH
0x2b4d23b35b9ca7e2417832e67f332b6cf921da5cb416a8587e8a84c574a82f3b590369142023-02-08 7:45:022 mins ago Hop Protocol: ETH Liquidity PoolHop Protocol: HOP - ETH Token0 ETH
0x31a52913003dc37fc5b834be8aad5869dbc52192af9af4cd57c29f877c57fae5590339822023-02-08 7:32:2415 mins ago Hop Protocol: HOP - ETH Token Hop Protocol: ETH Liquidity Pool0 ETH
0x31a52913003dc37fc5b834be8aad5869dbc52192af9af4cd57c29f877c57fae5590339822023-02-08 7:32:2415 mins ago Hop Protocol: ETH Rewards ContractHop Protocol: HOP - ETH Token0 ETH
0xa862d2ae6545243715e42c641dde223fe1be1346f389f04afc156ff483d1c6d4590339212023-02-08 7:32:0715 mins ago Hop Protocol: HOP - ETH Token Hop Protocol: ETH Liquidity Pool0 ETH
0xa862d2ae6545243715e42c641dde223fe1be1346f389f04afc156ff483d1c6d4590339212023-02-08 7:32:0715 mins ago Hop Protocol: ETH Liquidity PoolHop Protocol: HOP - ETH Token0 ETH
0xa862d2ae6545243715e42c641dde223fe1be1346f389f04afc156ff483d1c6d4590339212023-02-08 7:32:0715 mins ago Hop Protocol: ETH Liquidity PoolHop Protocol: HOP - ETH Token0 ETH
0x07989bd40c0db1ab92d8b8a86b0beee009b696aa3c96a5f8be8c807f8dd763ad590332942023-02-08 7:29:2318 mins ago Hop Protocol: HOP - ETH Token Hop Protocol: ETH Liquidity Pool0 ETH
0x07989bd40c0db1ab92d8b8a86b0beee009b696aa3c96a5f8be8c807f8dd763ad590332942023-02-08 7:29:2318 mins ago Hop Protocol: ETH Rewards ContractHop Protocol: HOP - ETH Token0 ETH
0x3ad1dd75048488be762352e373be3ef3585ac95245295e1c3d1bf3c772d0a6c9590332262023-02-08 7:29:0518 mins ago Hop Protocol: HOP - ETH Token Hop Protocol: ETH Liquidity Pool0 ETH
0x3ad1dd75048488be762352e373be3ef3585ac95245295e1c3d1bf3c772d0a6c9590332262023-02-08 7:29:0518 mins ago Hop Protocol: ETH Liquidity PoolHop Protocol: HOP - ETH Token0 ETH
0x3ad1dd75048488be762352e373be3ef3585ac95245295e1c3d1bf3c772d0a6c9590332262023-02-08 7:29:0518 mins ago Hop Protocol: ETH Liquidity PoolHop Protocol: HOP - ETH Token0 ETH
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Similar Match Source Code
Note: This contract matches the deployed ByteCode of the Source Code for Contract 0xB67c014FA700E69681a673876eb8BAFAA36BFf71

Contract Name:
LPToken

Compiler Version
v0.6.12+commit.27d51765

Optimization Enabled:
Yes with 50000 runs

Other Settings:
default evmVersion, MIT license

Contract Source Code (Solidity)

/**
 *Submitted for verification at Arbiscan on 2022-02-28
*/

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/*
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with 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 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);
}

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

    mapping (address => uint256) private _balances;

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

    uint256 private _totalSupply;

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

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

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

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5,05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
     * called.
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual returns (uint8) {
        return _decimals;
    }

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

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

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

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

    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * 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 virtual override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: 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 {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _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 {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
        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), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(sender, recipient, amount);

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

    /** @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 virtual {
        require(account != address(0), "ERC20: mint to the zero address");

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

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

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

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

        _balances[account] = _balances[account].sub(amount, "ERC20: 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 internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(address owner, address spender, uint256 amount) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

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

    /**
     * @dev Sets {decimals} to a value other than the default one of 18.
     *
     * WARNING: This function should only be called from the constructor. Most
     * applications that interact with token contracts will not expect
     * {decimals} to ever change, and may work incorrectly if it does.
     */
    function _setupDecimals(uint8 decimals_) internal virtual {
        _decimals = decimals_;
    }

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


/**
 * @dev Extension of {ERC20} that allows token holders to destroy both their own
 * tokens and those that they have an allowance for, in a way that can be
 * recognized off-chain (via event analysis).
 */
abstract contract ERC20Burnable is Context, ERC20 {
    using SafeMath for uint256;

    /**
     * @dev Destroys `amount` tokens from the caller.
     *
     * See {ERC20-_burn}.
     */
    function burn(uint256 amount) public virtual {
        _burn(_msgSender(), amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, deducting from the caller's
     * allowance.
     *
     * See {ERC20-_burn} and {ERC20-allowance}.
     *
     * Requirements:
     *
     * - the caller must have allowance for ``accounts``'s tokens of at least
     * `amount`.
     */
    function burnFrom(address account, uint256 amount) public virtual {
        uint256 decreasedAllowance = allowance(account, _msgSender()).sub(amount, "ERC20: burn amount exceeds allowance");

        _approve(account, _msgSender(), decreasedAllowance);
        _burn(account, amount);
    }
}

/**
 * @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 IAllowlist {
    function getPoolAccountLimit(address poolAddress)
        external
        view
        returns (uint256);

    function getPoolCap(address poolAddress) external view returns (uint256);

    function verifyAddress(address account, bytes32[] calldata merkleProof)
        external
        returns (bool);
}

interface ISwap {
    // pool data view functions
    function getA() external view returns (uint256);

    function getAllowlist() external view returns (IAllowlist);

    function getToken(uint8 index) external view returns (IERC20);

    function getTokenIndex(address tokenAddress) external view returns (uint8);

    function getTokenBalance(uint8 index) external view returns (uint256);

    function getVirtualPrice() external view returns (uint256);

    function isGuarded() external view returns (bool);

    // min return calculation functions
    function calculateSwap(
        uint8 tokenIndexFrom,
        uint8 tokenIndexTo,
        uint256 dx
    ) external view returns (uint256);

    function calculateTokenAmount(uint256[] calldata amounts, bool deposit)
        external
        view
        returns (uint256);

    function calculateRemoveLiquidity(uint256 amount)
        external
        view
        returns (uint256[] memory);

    function calculateRemoveLiquidityOneToken(
        uint256 tokenAmount,
        uint8 tokenIndex
    ) external view returns (uint256 availableTokenAmount);

    // state modifying functions
    function initialize(
        IERC20[] memory pooledTokens,
        uint8[] memory decimals,
        string memory lpTokenName,
        string memory lpTokenSymbol,
        uint256 a,
        uint256 fee,
        uint256 adminFee,
        uint256 withdrawFee
    ) external;

    function swap(
        uint8 tokenIndexFrom,
        uint8 tokenIndexTo,
        uint256 dx,
        uint256 minDy,
        uint256 deadline
    ) external returns (uint256);

    function addLiquidity(
        uint256[] calldata amounts,
        uint256 minToMint,
        uint256 deadline
    ) external returns (uint256);

    function removeLiquidity(
        uint256 amount,
        uint256[] calldata minAmounts,
        uint256 deadline
    ) external returns (uint256[] memory);

    function removeLiquidityOneToken(
        uint256 tokenAmount,
        uint8 tokenIndex,
        uint256 minAmount,
        uint256 deadline
    ) external returns (uint256);

    function removeLiquidityImbalance(
        uint256[] calldata amounts,
        uint256 maxBurnAmount,
        uint256 deadline
    ) external returns (uint256);

    // withdraw fee update function
    function updateUserWithdrawFee(address recipient, uint256 transferAmount)
        external;
}

/**
 * @title Liquidity Provider Token
 * @notice This token is an ERC20 detailed token with added capability to be minted by the owner.
 * It is used to represent user's shares when providing liquidity to swap contracts.
 */
contract LPToken is ERC20Burnable, Ownable {
    using SafeMath for uint256;

    // Address of the swap contract that owns this LP token. When a user adds liquidity to the swap contract,
    // they receive a proportionate amount of this LPToken.
    ISwap public swap;

    /**
     * @notice Deploys LPToken contract with given name, symbol, and decimals
     * @dev the caller of this constructor will become the owner of this contract
     * @param name_ name of this token
     * @param symbol_ symbol of this token
     * @param decimals_ number of decimals this token will be based on
     */
    constructor(
        string memory name_,
        string memory symbol_,
        uint8 decimals_
    ) public ERC20(name_, symbol_) {
        _setupDecimals(decimals_);
        swap = ISwap(_msgSender());
    }

    /**
     * @notice Mints the given amount of LPToken to the recipient.
     * @dev only owner can call this mint function
     * @param recipient address of account to receive the tokens
     * @param amount amount of tokens to mint
     */
    function mint(address recipient, uint256 amount) external onlyOwner {
        require(amount != 0, "amount == 0");
        _mint(recipient, amount);
    }

    /**
     * @dev Overrides ERC20._beforeTokenTransfer() which get called on every transfers including
     * minting and burning. This ensures that swap.updateUserWithdrawFees are called everytime.
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal override(ERC20) {
        super._beforeTokenTransfer(from, to, amount);
        swap.updateUserWithdrawFee(to, amount);
    }
}

Contract ABI

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Metadata Hash

18cb8313ff2fa133a71bd08a8765ccd8326aa6a9a4dda5e60723cf0e43596bab
Block Transaction Gas Used Reward
Age Block Fee Address BC Fee Address Voting Power Jailed Incoming
Block Uncle Number Difficulty Gas Used Reward
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