Contract 0x6f817a0ce8f7640add3bc0c1c2298635043c2423 2

 
 
Txn Hash Method
Block
From
To
Value [Txn Fee]
0x93dc3e22e13c440afbfdb5e68ba13e8af7ae78e04a89eefcdb2e5fb54979f835Approve119894222021-10-22 9:40:2527 mins ago0x67580fdced2da140d472fe2a6e4ca78b4e45b747 IN  Anyswap: anyETH Token0 BNB0.000223255
0x60ee9ca480b2bccd195357e376f59d2f8443a262607d56cacf95e58783635899Swapin119888442021-10-22 9:11:3156 mins agoAnyswap: Deployer 4 IN  Anyswap: anyETH Token0 BNB0.000276795
0xa556ada6eab62bf2808118553af99459f6fdbc9658594a93acba4ce606b86c59Swapout119859342021-10-22 6:39:393 hrs 27 mins ago0xb7dc1c26f1b893d4183d8014e341d1c6feb0b257 IN  Anyswap: anyETH Token0 BNB0.00011731
0x027c816f495b6d4866369a046475322181ed38c46c3271372eac4e5b458e0d05Swapin119858972021-10-22 6:37:463 hrs 29 mins agoAnyswap: Deployer 4 IN  Anyswap: anyETH Token0 BNB0.000276855
0x45e170ba3e6b49c26e7d49f68ccf9c4fd710059f4760082ebc5a5e5842cbaab3Swapout119856252021-10-22 6:24:093 hrs 43 mins ago0x68bfedb095fe66a68a9f7fae416108d5cbd091bc IN  Anyswap: anyETH Token0 BNB0.00011731
0x025b8618f6fcafb0231c9f487928ff516b489da776efecc39430372f163cc748Swapin119855562021-10-22 6:20:423 hrs 46 mins agoAnyswap: Deployer 4 IN  Anyswap: anyETH Token0 BNB0.000276855
0xe5640b8ec010bfe66835765bc6a437198fd3d365ba8ab61121670515dbbcb79aApprove119854222021-10-22 6:13:593 hrs 53 mins ago0x3e071055d535d9c818ba1dd198446722cd2cb6e2 IN  Anyswap: anyETH Token0 BNB0.000223255
0x8bfbf4ee65c0c6cec4fc825a9b22604abdf3b07f77d5be514ba5bfdcb8944d3eSwapin119854052021-10-22 6:13:083 hrs 54 mins agoAnyswap: Deployer 4 IN  Anyswap: anyETH Token0 BNB0.000276795
0x8b792431ac22ee5cc4673a02714b16199024a88d5c9f16aff2dbf413a332918aSwapout119843672021-10-22 5:13:494 hrs 53 mins ago0x07e27e597014930933e197903231904ce9ca645f IN  Anyswap: anyETH Token0 BNB0.00011731
0x8e7bfd2a23ef02c7126ff9b3b647c80e5ecf2cb3b6c3ca73b148f11a23b52339Swapin119843602021-10-22 5:13:254 hrs 54 mins agoAnyswap: Deployer 4 IN  Anyswap: anyETH Token0 BNB0.000276795
0x109c516c4811909232b4a1a29a701112b7544e503b876deeb6d8cafd4230b752Approve119843212021-10-22 5:11:014 hrs 56 mins ago0xa3ea3e75f4b420a9b9d2c2556d3c19638a721cfe IN  Anyswap: anyETH Token0 BNB0.000223255
0x67fd956aae888e8e3a3308eb74d47b4b9598ffce7553b1dda6de83d981064de9Swapin119841752021-10-22 5:02:035 hrs 5 mins agoAnyswap: Deployer 4 IN  Anyswap: anyETH Token0 BNB0.000276795
0xc8a2ab2191fe2a804edfac79128208ca1942dd6bda21f9aabe511032c811d08bApprove119839552021-10-22 4:48:445 hrs 18 mins ago0x223317649606e791210b14558d9690b6ae3e0d32 IN  Anyswap: anyETH Token0 BNB0.000127255
0xe4688aa900784229f948bc46303bf6f4972a5d9395b065101b5ed0ac289867c3Approve119839522021-10-22 4:48:355 hrs 18 mins ago0x223317649606e791210b14558d9690b6ae3e0d32 IN  Anyswap: anyETH Token0 BNB0.000223255
0xdcb783a8c9e0f20155c13489f9e9263dbf35cf09ff76150ba3b204aaa8728ecaApprove119820062021-10-22 3:07:027 hrs ago0xfb29366cd27f56a67676bae7970c5f23d40b34e6 IN  Anyswap: anyETH Token0 BNB0.000223255
0xf110136c7e87a6342b25940e9c40dd099d3cd4e161f83dab7901e41002d3746aSwapin119814322021-10-22 2:37:557 hrs 29 mins agoAnyswap: Deployer 4 IN  Anyswap: anyETH Token0 BNB0.000276855
0x74f046503ea58ee3a9dac35334d8e2c3266ef1970a1bda9e6faa9834b93bdf16Swapout119802402021-10-22 1:37:338 hrs 29 mins ago0xaa03a9938bd3b2eb4908e03f425ddca59b1c803f IN  Anyswap: anyETH Token0 BNB0.00011743
0x3dab5e5cf99ce69690adbf1151e5cd79cad6777cd2474c49e96bd09c6599bd4cApprove119799632021-10-22 1:23:408 hrs 43 mins ago0x075644595195d80c7cf66d7b46469ec5e8edd9e8 IN  Anyswap: anyETH Token0 BNB0.000223255
0xe1baa1e75ea02a8a184cffc112dd21571857b199da09a23675c3c4eb2016b524Swapin119795682021-10-22 1:02:519 hrs 4 mins agoAnyswap: Deployer 4 IN  Anyswap: anyETH Token0 BNB0.000276855
0x1373c7b68e2a5cc174ed2b0602b2f7e0a35d68d051be2e2bfa2a18db791fbb75Approve119773982021-10-21 23:12:1010 hrs 55 mins ago0x04d735554f91bbb5b03a2e2202f4c4c4470dab47 IN  Anyswap: anyETH Token0 BNB0.000223255
0x663a7e40a72a4758ed6d1dc7335ce54629b34f45abccda9f712ec4c683626c79Swapin119773662021-10-21 23:10:3410 hrs 56 mins agoAnyswap: Deployer 4 IN  Anyswap: anyETH Token0 BNB0.000276855
0xba5d73a6d5bdf5c2077199178cb59cae438cdb4a09734b0959c5dea28c38ed0dApprove119771332021-10-21 22:58:5511 hrs 8 mins ago0xcc7e25778ca2be3803432f193f5761caa454635a IN  Anyswap: anyETH Token0 BNB0.000223255
0x8c07e07cb98aefa5b14c3f91f363cd0c48b3d5a3b4387baa4e91f6f8e8d7f207Swapin119766922021-10-21 22:36:5211 hrs 30 mins agoAnyswap: Deployer 4 IN  Anyswap: anyETH Token0 BNB0.000276855
0xc781c31d98360cf822b87bd6bff59af1f2d0263745752085240142945ab1944aSwapin119766342021-10-21 22:33:5811 hrs 33 mins agoAnyswap: Deployer 4 IN  Anyswap: anyETH Token0 BNB0.000276795
0x848021ea730d0d1b8e820cb86c6d9ca4cac125d9c4245df1ba87a86f49d4a775Approve119763802021-10-21 22:21:1511 hrs 46 mins ago0x8975c63a85e31cc5241bfd203e881ce7824c95ce IN  Anyswap: anyETH Token0 BNB0.000223255
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Latest 25 internal transaction
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0xd64d5aac395760574f19e81a476cbdf496d1543aed0fac2df651257a546d574e54703062021-03-07 11:08:15228 days 22 hrs ago 0xbc2910dee5e78dbefa6579fc6b56bab2b7c8ffbf Anyswap: anyETH Token0 BNB
0xd64d5aac395760574f19e81a476cbdf496d1543aed0fac2df651257a546d574e54703062021-03-07 11:08:15228 days 22 hrs ago 0xbc2910dee5e78dbefa6579fc6b56bab2b7c8ffbf Anyswap: anyETH Token0 BNB
0xff96ca582cfcbbba7ff181f8964008440ba823bed827bb45352bea301a76801e54702972021-03-07 11:07:48228 days 22 hrs ago 0xbc2910dee5e78dbefa6579fc6b56bab2b7c8ffbf Anyswap: anyETH Token0 BNB
0xff96ca582cfcbbba7ff181f8964008440ba823bed827bb45352bea301a76801e54702972021-03-07 11:07:48228 days 22 hrs ago 0xbc2910dee5e78dbefa6579fc6b56bab2b7c8ffbf Anyswap: anyETH Token0 BNB
0xff96ca582cfcbbba7ff181f8964008440ba823bed827bb45352bea301a76801e54702972021-03-07 11:07:48228 days 22 hrs ago 0xbc2910dee5e78dbefa6579fc6b56bab2b7c8ffbf Anyswap: anyETH Token0 BNB
0xae4cbc1ba385650e543143981979633f86554cf97e2a5f352aec2df807daeed054702492021-03-07 11:05:24228 days 23 hrs ago 0xbc2910dee5e78dbefa6579fc6b56bab2b7c8ffbf Anyswap: anyETH Token0 BNB
0xae4cbc1ba385650e543143981979633f86554cf97e2a5f352aec2df807daeed054702492021-03-07 11:05:24228 days 23 hrs ago 0xbc2910dee5e78dbefa6579fc6b56bab2b7c8ffbf Anyswap: anyETH Token0 BNB
0xae4cbc1ba385650e543143981979633f86554cf97e2a5f352aec2df807daeed054702492021-03-07 11:05:24228 days 23 hrs ago 0xbc2910dee5e78dbefa6579fc6b56bab2b7c8ffbf Anyswap: anyETH Token0 BNB
0xc9763df6989740f5ed5bfcfa158e9fa39b95e2daa8a00c2da7d8d4d411e7671154698542021-03-07 10:45:39228 days 23 hrs ago 0xbc2910dee5e78dbefa6579fc6b56bab2b7c8ffbf Anyswap: anyETH Token0 BNB
0xc9763df6989740f5ed5bfcfa158e9fa39b95e2daa8a00c2da7d8d4d411e7671154698542021-03-07 10:45:39228 days 23 hrs ago 0xbc2910dee5e78dbefa6579fc6b56bab2b7c8ffbf Anyswap: anyETH Token0 BNB
0x43d1f0c32ae50a944fe123060b6144c84da1d299c1826c64b0ef696bf73a190054695932021-03-07 10:32:36228 days 23 hrs ago 0xbc2910dee5e78dbefa6579fc6b56bab2b7c8ffbf Anyswap: anyETH Token0 BNB
0x43d1f0c32ae50a944fe123060b6144c84da1d299c1826c64b0ef696bf73a190054695932021-03-07 10:32:36228 days 23 hrs ago 0xbc2910dee5e78dbefa6579fc6b56bab2b7c8ffbf Anyswap: anyETH Token0 BNB
0x43d1f0c32ae50a944fe123060b6144c84da1d299c1826c64b0ef696bf73a190054695932021-03-07 10:32:36228 days 23 hrs ago 0xbc2910dee5e78dbefa6579fc6b56bab2b7c8ffbf Anyswap: anyETH Token0 BNB
0x7d1da83514ea4397d84e30ed6c262c91c2b0f996a7ffa78e863cf7e0ee4f96e254695022021-03-07 10:28:03228 days 23 hrs ago 0xbc2910dee5e78dbefa6579fc6b56bab2b7c8ffbf Anyswap: anyETH Token0 BNB
0x7d1da83514ea4397d84e30ed6c262c91c2b0f996a7ffa78e863cf7e0ee4f96e254695022021-03-07 10:28:03228 days 23 hrs ago 0xbc2910dee5e78dbefa6579fc6b56bab2b7c8ffbf Anyswap: anyETH Token0 BNB
0x7d1da83514ea4397d84e30ed6c262c91c2b0f996a7ffa78e863cf7e0ee4f96e254695022021-03-07 10:28:03228 days 23 hrs ago 0xbc2910dee5e78dbefa6579fc6b56bab2b7c8ffbf Anyswap: anyETH Token0 BNB
0x587385410245e11fdb51e581a0a57e6ba35930084aebdc0187a094c121ad21a954689402021-03-07 9:59:57229 days 7 mins ago 0xbc2910dee5e78dbefa6579fc6b56bab2b7c8ffbf Anyswap: anyETH Token0 BNB
0x587385410245e11fdb51e581a0a57e6ba35930084aebdc0187a094c121ad21a954689402021-03-07 9:59:57229 days 7 mins ago 0xbc2910dee5e78dbefa6579fc6b56bab2b7c8ffbf Anyswap: anyETH Token0 BNB
0xf82d651c2f7e2b96747c3e6b771d09ebc0c76c1653ca1ca88aa5553f9254eed154646622021-03-07 6:26:03229 days 3 hrs ago 0xbc2910dee5e78dbefa6579fc6b56bab2b7c8ffbf Anyswap: anyETH Token0 BNB
0xf82d651c2f7e2b96747c3e6b771d09ebc0c76c1653ca1ca88aa5553f9254eed154646622021-03-07 6:26:03229 days 3 hrs ago 0xbc2910dee5e78dbefa6579fc6b56bab2b7c8ffbf Anyswap: anyETH Token0 BNB
0x584e6438ce20a7fb2008199d3fd1814ad309268faf75ddfdc420b4369e475aea54634292021-03-07 5:24:14229 days 4 hrs ago 0xbc2910dee5e78dbefa6579fc6b56bab2b7c8ffbf Anyswap: anyETH Token0 BNB
0x584e6438ce20a7fb2008199d3fd1814ad309268faf75ddfdc420b4369e475aea54634292021-03-07 5:24:14229 days 4 hrs ago 0xbc2910dee5e78dbefa6579fc6b56bab2b7c8ffbf Anyswap: anyETH Token0 BNB
0x23921744f9e913554503cde1230824d9a0971086c21fbc700c1dfd248cc4194054601152021-03-07 2:38:32229 days 7 hrs ago 0xbc2910dee5e78dbefa6579fc6b56bab2b7c8ffbf Anyswap: anyETH Token0 BNB
0x23921744f9e913554503cde1230824d9a0971086c21fbc700c1dfd248cc4194054601152021-03-07 2:38:32229 days 7 hrs ago 0xbc2910dee5e78dbefa6579fc6b56bab2b7c8ffbf Anyswap: anyETH Token0 BNB
0x71d6467975b3d722ecf4a9f1e2ef0c6c25f1de69011be411a4019f3063e4a4a054601092021-03-07 2:38:14229 days 7 hrs ago 0xbc2910dee5e78dbefa6579fc6b56bab2b7c8ffbf Anyswap: anyETH Token0 BNB
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Contract Source Code Verified (Similar Match)
Note: This contract matches the deployed ByteCode of the Source Code for Contract 0x7d6a240cd0976a9fa10abdc8302a7ae07f9fdd89

Contract Name:
Erc20SwapAsset

Compiler Version
v0.5.4+commit.9549d8ff

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, MIT license

Contract Source Code (Solidity)

/**
 *Submitted for verification at BscScan.com on 2020-10-29
*/

// SPDX-License-Identifier: MIT

// File: @openzeppelin/contracts/GSN/Context.sol

pragma solidity ^0.5.0;

/*
 * @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.
 */
contract Context {
    // Empty internal constructor, to prevent people from mistakenly deploying
    // an instance of this contract, which should be used via inheritance.
    constructor () internal { }
    // solhint-disable-previous-line no-empty-blocks

    function _msgSender() internal view returns (address payable) {
        return msg.sender;
    }

    function _msgData() internal view returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

// File: @openzeppelin/contracts/token/ERC20/IERC20.sol

pragma solidity ^0.5.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP. Does not include
 * the optional functions; to access them see {ERC20Detailed}.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

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

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

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

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

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

// File: @openzeppelin/contracts/math/SafeMath.sol

pragma solidity ^0.5.0;

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

        return c;
    }

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

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot overflow.
     *
     * _Available since v2.4.0._
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) {
            return 0;
        }

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

        return c;
    }

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

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     *
     * _Available since v2.4.0._
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        // Solidity only automatically asserts when dividing by 0
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

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

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     *
     * _Available since v2.4.0._
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

// File: @openzeppelin/contracts/token/ERC20/ERC20.sol

pragma solidity ^0.5.0;




/**
 * @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 {ERC20Mintable}.
 *
 * 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;

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

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view 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 returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

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

    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public 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 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 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 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 {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _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 {
        require(account != address(0), "ERC20: mint to the zero address");

        _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), "ERC20: burn from the zero address");

        _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 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), "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 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, "ERC20: burn amount exceeds allowance"));
    }
}

// File: @openzeppelin/contracts/token/ERC20/ERC20Detailed.sol

pragma solidity ^0.5.0;


/**
 * @dev Optional functions from the ERC20 standard.
 */
contract ERC20Detailed is IERC20 {
    string private _name;
    string private _symbol;
    uint8 private _decimals;

    /**
     * @dev Sets the values for `name`, `symbol`, and `decimals`. All three of
     * these values are immutable: they can only be set once during
     * construction.
     */
    constructor (string memory name, string memory symbol, uint8 decimals) public {
        _name = name;
        _symbol = symbol;
        _decimals = decimals;
    }

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

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view 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.
     *
     * 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 returns (uint8) {
        return _decimals;
    }
}

// File: internal/Erc20SwapAsset.sol

pragma solidity ^0.5.0;



contract Erc20SwapAsset is ERC20, ERC20Detailed {
    event LogChangeDCRMOwner(address indexed oldOwner, address indexed newOwner, uint indexed effectiveHeight);
    event LogSwapin(bytes32 indexed txhash, address indexed account, uint amount);
    event LogSwapout(address indexed account, address indexed bindaddr, uint amount);

    address private _oldOwner;
    address private _newOwner;
    uint256 private _newOwnerEffectiveHeight;

    modifier onlyOwner() {
        require(msg.sender == owner(), "only owner");
        _;
    }

    constructor(string memory name, string memory symbol, uint8 decimals) public ERC20Detailed(name, symbol, decimals) {
        _newOwner = msg.sender;
        _newOwnerEffectiveHeight = block.number;
    }

    function owner() public view returns (address) {
        if (block.number >= _newOwnerEffectiveHeight) {
            return _newOwner;
        }
        return _oldOwner;
    }

    function changeDCRMOwner(address newOwner) public onlyOwner returns (bool) {
        require(newOwner != address(0), "new owner is the zero address");
        _oldOwner = owner();
        _newOwner = newOwner;
        _newOwnerEffectiveHeight = block.number + 13300;
        emit LogChangeDCRMOwner(_oldOwner, _newOwner, _newOwnerEffectiveHeight);
        return true;
    }

    function Swapin(bytes32 txhash, address account, uint256 amount) public onlyOwner returns (bool) {
        _mint(account, amount);
        emit LogSwapin(txhash, account, amount);
        return true;
    }

    function Swapout(uint256 amount, address bindaddr) public returns (bool) {
        require(bindaddr != address(0), "bind address is the zero address");
        _burn(_msgSender(), amount);
        emit LogSwapout(_msgSender(), bindaddr, amount);
        return true;
    }
}

Contract Security Audit

Contract ABI

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Swarm Source

bzzr://234b399b35865aaac832036989cb94a7120a57e12ac0a41939f2a63c57e328ba
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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