Contract 0xce3b19d820cb8b9ae370e423b0a329c4314335fe 3

 

Contract Overview

Hop Protocol: HOP - USDT Token
Balance:
0 ETH

ETH Value:
$0.00

Token:
Txn Hash Method
Block
From
To
Value [Txn Fee]
0x6c5a0fadbfbba562e1783a095ffd381251e7826df183fbf05e5aa463b1b2ae0bApprove588065412023-02-07 13:33:3722 mins ago0xe950d7e5066c0412d8416bac74c45a499ef8b5fd IN Hop Protocol: HOP - USDT Token0 ETH0.00005208
0x58de9b5e145414754a4ee522b047cfea9fe1c4e382cb50250e770ac8d7ff6bf1Approve588062242023-02-07 13:32:1423 mins ago0x5dd54a63bd999ca5a8c1b9f24dafa1221f349255 IN Hop Protocol: HOP - USDT Token0 ETH0.00005211
0x5e03a2e1d0bac1e36b0d336f0c3fa558fbe2de31ae4426c94b1fcdda290c3c81Approve588050282023-02-07 13:27:0429 mins ago0xe950d7e5066c0412d8416bac74c45a499ef8b5fd IN Hop Protocol: HOP - USDT Token0 ETH0.00004982
0xcc8840828ab5aa652955050046a509a2644e4af58e83902b076e76ad69077877Approve588010342023-02-07 13:09:3146 mins ago0x338b69844f2249707942477780b7d259b9918fae IN Hop Protocol: HOP - USDT Token0 ETH0.00004625
0xa50150026e250b4d5924bb2a1dd422b4d929e29c0bd339cda8fa5353458c00a8Approve587982572023-02-07 12:57:1858 mins ago0xa8e8b427766cb8febe4fb07b31c43ea86d19d49e IN Hop Protocol: HOP - USDT Token0 ETH0.00004415
0x38778b49a19fb83e7a7d352ceb9c794e6de857176d013c674700c862cb07cfe6Approve587977282023-02-07 12:54:531 hr 1 min ago0xa8e8b427766cb8febe4fb07b31c43ea86d19d49e IN Hop Protocol: HOP - USDT Token0 ETH0.00004437
0xbd8e35058e3721c4c832cced059bc00f116aa6df8db1df8411088083709c12f9Approve587976582023-02-07 12:54:341 hr 1 min ago0x84d3e04b494352b172eee2ffc4a5f066f3a68d8b IN Hop Protocol: HOP - USDT Token0 ETH0.0000444
0x28bba2631319436c5f83346466a69e3a2e35c5345519e756a5c624c325dbdc60Approve587953852023-02-07 12:44:381 hr 11 mins ago0x20714f340a2fcb063084363c6dc919896ec72326 IN Hop Protocol: HOP - USDT Token0 ETH0.00004606
0x34fbfbbfe113398dafc1c1158a0e35a36e0e9675afb3907786fa6a2af80c25bdApprove587916862023-02-07 12:28:211 hr 27 mins ago0x8952753459482a8703e0cb1d94fb3964b95bd23f IN Hop Protocol: HOP - USDT Token0 ETH0.00004453
0x5b5c17cd6869ece8005e44a6e6abe9d9588304ba35d88d589e410b3b966cb57dApprove587899762023-02-07 12:20:541 hr 35 mins ago0x7624e6247d1ad07d5c0df3bf97fccfdae5490771 IN Hop Protocol: HOP - USDT Token0 ETH0.0000439
0x8df4c8981858b425dd4f3e80f0cd5c7623915e21719b170aed634464bffbaefeApprove587725942023-02-07 11:04:282 hrs 51 mins ago0x2206ebf39d9282f0c45e8a674f1734850f7f9e78 IN Hop Protocol: HOP - USDT Token0 ETH0.00003933
0x6f093401372d41cc3514ab8a1fdc3f7d9320817399b7c39b00e73586d82a0d88Approve587703432023-02-07 10:54:363 hrs 1 min ago0x0b908de2743936b3e84c95901d1da4ffba518eee IN Hop Protocol: HOP - USDT Token0 ETH0.00004165
0xa7960a6578885a5415ca8776792264666245e9ae6429f922917a36efa383f12cApprove587670932023-02-07 10:39:583 hrs 16 mins ago0xde2d3472ba38f23b7cd06c252318a13f6e7dd229 IN Hop Protocol: HOP - USDT Token0 ETH0.00004334
0x10a654dc169d2d898700b8604bd51f6f2dc934ad68fd2544e5de7d031684e96bApprove587539162023-02-07 9:42:204 hrs 13 mins ago0xcff92554a752a0d77543e0a9eae8496e3019e7c1 IN Hop Protocol: HOP - USDT Token0 ETH0.00004193
0x4c327314c57feee55865198ac497ddd4f90b94e9606742772acf3f949bcf5c94Approve587453852023-02-07 9:05:414 hrs 50 mins ago0xfe230e4cd3e756d75ebbf28534e0783eda942f60 IN Hop Protocol: HOP - USDT Token0 ETH0.00003829
0x331306dde6a6ca25ae82bb3f2ec5ba36f1fee617f6a2692d8533c19ff60cab1bApprove587448952023-02-07 9:03:364 hrs 52 mins ago0x7772a4dc122142e7581bba7240586e9966905cec IN Hop Protocol: HOP - USDT Token0 ETH0.00003866
0x1964756e779545d387a3f420c08272bfb8c26643524720b873689728c51a5d02Approve587431002023-02-07 8:55:575 hrs ago0x7772a4dc122142e7581bba7240586e9966905cec IN Hop Protocol: HOP - USDT Token0 ETH0.00003805
0x037419a5e38303c43eda52f196ccd502fe4044dc22f4c6914c44398c0e93ae6cApprove587409932023-02-07 8:47:015 hrs 9 mins ago0x29e895407ce34c1b9a403e9fd7ca0814e9b6896e IN Hop Protocol: HOP - USDT Token0 ETH0.00003945
0x9a4faf7822d52564cca6c09c311e0e315db7c58c0115cdd3509532780d62cdd0Approve587340972023-02-07 8:16:385 hrs 39 mins ago0x340512a4d5df82127725bf5d2a1ee7f93c8cadeb IN Hop Protocol: HOP - USDT Token0 ETH0.00003334
0x75d25fe2960d70840cf5683ceb83d17fcc730143d6417edd209b9a1ae8075015Approve587307032023-02-07 8:01:335 hrs 54 mins ago0xe23c20e9c733c35f0a2ab6e4c38e1c08ec8ca884 IN Hop Protocol: HOP - USDT Token0 ETH0.00003846
0xd226eb27e474445547f7a4413fb01ad11fe23ff1579a87fda881c207f85a63d3Approve587235842023-02-07 7:28:426 hrs 27 mins ago0xe9cc0ec2ffc8f365a20fccebdc4e0b99142e7b53 IN Hop Protocol: HOP - USDT Token0 ETH0.00004478
0x97135511253bfef4aa930e6498d81d11c40ec2ac3c111f572748933e8c5d1677Approve587201412023-02-07 7:12:406 hrs 43 mins ago0xdccf29fa0f10922f6284441193b0192d361101d4 IN Hop Protocol: HOP - USDT Token0 ETH0.00003791
0xb9a1598b1a9ef323bf4161325807562fa7ba17b22c5e7ce8246d63ddc24dde1aApprove586943992023-02-07 5:03:388 hrs 52 mins ago0xfadd36f61f02b0b3a73c8e8e6b74af1d6f370f86 IN Hop Protocol: HOP - USDT Token0 ETH0.00003748
0xbc4c194718f9825089552b96c46d7028d815de68402820996498568ffbeebb08Approve586942872023-02-07 5:02:548 hrs 53 mins ago0xd3c42a9d0a85be48396b55838b3dedd8d47ba320 IN Hop Protocol: HOP - USDT Token0 ETH0.00003748
0x787405f9d679eddeceb1ca542caa81d873416b825dd8fa211d05a113494d5d7cApprove586941302023-02-07 5:01:538 hrs 54 mins ago0x1d361f036225776cdb2fa1b4c82dd91bcc501e60 IN Hop Protocol: HOP - USDT Token0 ETH0.00003748
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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
0xb6642052efb50cb824da84215e260212ee4db905c69b8975f7735e7565514155588075042023-02-07 13:37:4118 mins ago Hop Protocol: HOP - USDT Token Hop Protocol: USDT Liquidity Pool0 ETH
0xb6642052efb50cb824da84215e260212ee4db905c69b8975f7735e7565514155588075042023-02-07 13:37:4118 mins ago Hop Protocol: USDT Liquidity PoolHop Protocol: HOP - USDT Token0 ETH
0xb6642052efb50cb824da84215e260212ee4db905c69b8975f7735e7565514155588075042023-02-07 13:37:4118 mins ago Hop Protocol: USDT Liquidity PoolHop Protocol: HOP - USDT Token0 ETH
0x95482c28426e7cc944009aa713675ce88c15db941d39fb272037722b624195c7588065622023-02-07 13:33:4222 mins ago Hop Protocol: HOP - USDT Token Hop Protocol: USDT Liquidity Pool0 ETH
0x95482c28426e7cc944009aa713675ce88c15db941d39fb272037722b624195c7588065622023-02-07 13:33:4222 mins ago Hop Protocol: USDT Rewards ContractHop Protocol: HOP - USDT Token0 ETH
0x81a92ce15e6a14b4e56214831fb6b40daf99914cb31b3f496ff4f0466b104d18588065102023-02-07 13:33:2922 mins ago Hop Protocol: HOP - USDT Token Hop Protocol: USDT Liquidity Pool0 ETH
0x81a92ce15e6a14b4e56214831fb6b40daf99914cb31b3f496ff4f0466b104d18588065102023-02-07 13:33:2922 mins ago Hop Protocol: USDT Liquidity PoolHop Protocol: HOP - USDT Token0 ETH
0x81a92ce15e6a14b4e56214831fb6b40daf99914cb31b3f496ff4f0466b104d18588065102023-02-07 13:33:2922 mins ago Hop Protocol: USDT Liquidity PoolHop Protocol: HOP - USDT Token0 ETH
0x793cf66c7d06b64d29c4d32ab2a86c0e0dd5b79e133a62439e08656e698debd0588062592023-02-07 13:32:2323 mins ago Hop Protocol: HOP - USDT Token Hop Protocol: USDT Liquidity Pool0 ETH
0x793cf66c7d06b64d29c4d32ab2a86c0e0dd5b79e133a62439e08656e698debd0588062592023-02-07 13:32:2323 mins ago Hop Protocol: USDT Rewards ContractHop Protocol: HOP - USDT Token0 ETH
0x7de2d660af2ced5d39fd4d383c7344c13247bfa80a466e52ecf364ccd5738223588061562023-02-07 13:31:5624 mins ago Hop Protocol: HOP - USDT Token Hop Protocol: USDT Liquidity Pool0 ETH
0x7de2d660af2ced5d39fd4d383c7344c13247bfa80a466e52ecf364ccd5738223588061562023-02-07 13:31:5624 mins ago Hop Protocol: USDT Liquidity PoolHop Protocol: HOP - USDT Token0 ETH
0x7de2d660af2ced5d39fd4d383c7344c13247bfa80a466e52ecf364ccd5738223588061562023-02-07 13:31:5624 mins ago Hop Protocol: USDT Liquidity PoolHop Protocol: HOP - USDT Token0 ETH
0x4ee1d274356ce07e5dd3820f5e152b8cad1e4ed1d6a256c642f5d78ea374236e588050582023-02-07 13:27:1128 mins ago Hop Protocol: HOP - USDT Token Hop Protocol: USDT Liquidity Pool0 ETH
0x4ee1d274356ce07e5dd3820f5e152b8cad1e4ed1d6a256c642f5d78ea374236e588050582023-02-07 13:27:1128 mins ago Hop Protocol: USDT Rewards ContractHop Protocol: HOP - USDT Token0 ETH
0x3ebe6ae12c3dd0cddaa16411c4146b5e6b99d8870c1c244f87fa457d7103675b588049972023-02-07 13:26:5629 mins ago Hop Protocol: HOP - USDT Token Hop Protocol: USDT Liquidity Pool0 ETH
0x3ebe6ae12c3dd0cddaa16411c4146b5e6b99d8870c1c244f87fa457d7103675b588049972023-02-07 13:26:5629 mins ago Hop Protocol: USDT Liquidity PoolHop Protocol: HOP - USDT Token0 ETH
0x3ebe6ae12c3dd0cddaa16411c4146b5e6b99d8870c1c244f87fa457d7103675b588049972023-02-07 13:26:5629 mins ago Hop Protocol: USDT Liquidity PoolHop Protocol: HOP - USDT Token0 ETH
0xd913a4ddc2e30a8eed98ef5af08070cb9b00b7a2c3ff2b7c918aa4d16f6df2f4588032562023-02-07 13:19:2136 mins ago Hop Protocol: HOP - USDT Token Hop Protocol: USDT Liquidity Pool0 ETH
0xd913a4ddc2e30a8eed98ef5af08070cb9b00b7a2c3ff2b7c918aa4d16f6df2f4588032562023-02-07 13:19:2136 mins ago Hop Protocol: USDT Liquidity PoolHop Protocol: HOP - USDT Token0 ETH
0xd913a4ddc2e30a8eed98ef5af08070cb9b00b7a2c3ff2b7c918aa4d16f6df2f4588032562023-02-07 13:19:2136 mins ago Hop Protocol: USDT Liquidity PoolHop Protocol: HOP - USDT Token0 ETH
0xeb14b43f64a52a3a732f20f34b6b6358ef84f9e993d0d4d7c6d5c452f74ec73f588032492023-02-07 13:19:2036 mins ago Hop Protocol: HOP - USDT Token Hop Protocol: USDT Liquidity Pool0 ETH
0xeb14b43f64a52a3a732f20f34b6b6358ef84f9e993d0d4d7c6d5c452f74ec73f588032492023-02-07 13:19:2036 mins ago Hop Protocol: USDT Liquidity PoolHop Protocol: HOP - USDT Token0 ETH
0xeb14b43f64a52a3a732f20f34b6b6358ef84f9e993d0d4d7c6d5c452f74ec73f588032492023-02-07 13:19:2036 mins ago Hop Protocol: USDT Liquidity PoolHop Protocol: HOP - USDT Token0 ETH
0x4a13f7fc59bbcf68d74fd56f05c79a6a3c5c92c2e22f9cb14675f44529b864bf588032472023-02-07 13:19:1936 mins ago Hop Protocol: HOP - USDT Token Hop Protocol: USDT Liquidity Pool0 ETH
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Loading

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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