Contract 0xbea2576f400b070c7cdf11d1cbb49de0c84e3bcf

 

Contract Overview

DigitalNote: WXDN Token
Balance:
0 BNB

BNB Value:
$0.00

Token:
Txn Hash
Block
From
To
Value [Txn Fee]
0xe25d50a09cddc83562018c8dea5f621afac57a29223addea3bdd4d978c975df067726872021-04-22 0:24:481 hr 48 mins ago0xd5d37803b19f4e49888ab8d744cb6347e64a6dc2 IN  DigitalNote: WXDN Token0 BNB0.00022214
0xdd28118bd2bcabf0dd8132107b2e290078b8fe394aab14b1dc382c13cc075c1b67675942021-04-21 20:03:456 hrs 9 mins ago0x71080204063af55f4e3fb955cc664d05639a70cb IN  DigitalNote: WXDN Token0 BNB0.000255885
0x86135c11b11aa377a0563db2a6f3353db79f5f192159cadc2d439f8940ad97cc67667212021-04-21 19:20:056 hrs 53 mins ago0xfa27b66e71c75d8ad7ae25e99d0367ee4831654b IN  DigitalNote: WXDN Token0 BNB0.000103385
0x89895206f8c5968cc4b1b933e35312f807ec5bef084be101c31133981b14306967667002021-04-21 19:19:026 hrs 54 mins ago0x8517c00eff4a605b337d1910d02bdc51840d63cb IN  DigitalNote: WXDN Token0 BNB0.000256005
0xb80bbe051fa0180e978da6151de17c8edd1a970683929141f13d9528ee23278067664662021-04-21 19:07:207 hrs 5 mins ago0xa009cfb30b7015821bebd81757556f0a4089a710 IN  DigitalNote: WXDN Token0 BNB0.00022214
0x43f67d63828629c3577c6e0c2950ede277548ed07406af1e0354091dc9887c0f67586982021-04-21 12:02:4014 hrs 10 mins ago0xbe62de3c9bfb20ec203291aa32e3e797d04e6625 IN  DigitalNote: WXDN Token0 BNB0.000255945
0x25de285e7c017c5657a7e064c581d7e784afcb2195ecc2ad690c80ab080d08f767572252021-04-21 10:48:0215 hrs 25 mins ago0x96ffaf9c8e2898ec0bbe5154a9023346c516ee74 IN  DigitalNote: WXDN Token0 BNB0.000103325
0xc0e09a4f5cf84a80223153f6c9fcf224b1756abb260deb112e262df303eea67767569422021-04-21 10:33:5315 hrs 39 mins ago0x69850bbd66e2f8528ce53174f183472f918776eb IN  DigitalNote: WXDN Token0 BNB0.000180945
0x3119b9435724db2e6194d4d6acfd8d084b67bc78ec0c29de76c8b2400fc4268867504002021-04-21 5:02:2921 hrs 10 mins ago0x6d0deca0ea6e8657a159f5a9fd1fe755e761e320 IN  DigitalNote: WXDN Token0 BNB0.000103445
0xa06d7649670db679c10118f99580450b8db4730952a34d03ae123344e4adb08467503822021-04-21 5:01:3521 hrs 11 mins ago0x13837d76c7eaea7b959fbc8639042a76c4ed018d IN  DigitalNote: WXDN Token0 BNB0.000256065
0xa17ee1468cbf0a28e10930f115ee937e2e3ebbb556120b70965be2cf73f6988267503502021-04-21 4:59:5921 hrs 13 mins ago0x5ecfc87f38d4b9c01b977ad4c0772bf8138f4846 IN  DigitalNote: WXDN Token0 BNB0.000103385
0xd6a06aad5a5756424081e2eb0910f2fedfa43eafbe75cd44df270fd13320e9f867503342021-04-21 4:59:1121 hrs 13 mins ago0x13837d76c7eaea7b959fbc8639042a76c4ed018d IN  DigitalNote: WXDN Token0 BNB0.000256005
0x62afdb3d7d80804e75f86884c7dca5f2cc966f3b2e303fbb3aa5a322ef230b7267502862021-04-21 4:56:4721 hrs 16 mins ago0x2e1a052704c6f72e0d7c1c10af6137befb350728 IN  DigitalNote: WXDN Token0 BNB0.000103385
0xa558f3d61cdd4114ea8c9c207250ac1de7fb2d1ada478cf5b0297ac6b6d6d24167502662021-04-21 4:55:4721 hrs 17 mins ago0x13837d76c7eaea7b959fbc8639042a76c4ed018d IN  DigitalNote: WXDN Token0 BNB0.000256005
0x282949fd89930ba142fed547f000f7e227d42fd322f6754d63fc8a3964b6e07367472892021-04-21 2:26:2223 hrs 46 mins ago0xc9d2ce5d1c49d5321a0befa161a1c2964116fe3d IN  DigitalNote: WXDN Token0 BNB0.00022214
0xe2939f2f3a58715d7635aa6760a6f478a81cf7ed7310bb2a7b9d6419f8e07e7d67438532021-04-20 23:32:541 day 2 hrs ago0x7122c91049511b58a14ce2ce10f1acf318cc51d0 IN  DigitalNote: WXDN Token0 BNB0.00022082
0xfcc6c51ad4b4d75d4f036e753251d31b461058ad87710e79f17c459536f0316267367122021-04-20 17:32:401 day 8 hrs ago0x921dac3339700acaf0d8bcc3587f3e3cdeb9a732 IN  DigitalNote: WXDN Token0 BNB0.00022214
0xbaaa2a740160b064a77f9d9fd1aec6a2ee0c7b15355f0dedc5983412381964ad67302192021-04-20 12:04:051 day 14 hrs ago0x793f541a8bcb8b79515f1cd2dd4596ed8c6b6104 IN  DigitalNote: WXDN Token0 BNB0.00022214
0xcada1d28c39470933fe4c2d31f757a1be31264358ec4e6ee321c4e8c81d4b26567287162021-04-20 10:48:561 day 15 hrs ago0x1ef9f3cc5046725de672c8f1e649b8839a0f94a4 IN  DigitalNote: WXDN Token0 BNB0.00012422
0xcb228ff290a1e342e0afe4b026e69fa99d457b0fffd2f7622befe0efc42c066167286242021-04-20 10:44:121 day 15 hrs ago0x1ef9f3cc5046725de672c8f1e649b8839a0f94a4 IN  DigitalNote: WXDN Token0 BNB0.00007261
0x9df1334f97bfe9c1fbf943546546d761226f0d699f038509935da535df59217467276112021-04-20 9:52:501 day 16 hrs ago0x5b427f8167df8982a69e6345d14ca282720dc57e IN  DigitalNote: WXDN Token0 BNB0.00022214
0x02c237ddf561432c5d3d9e006732a127fc4710670399b11dfe56f98ad81923a067259022021-04-20 8:27:161 day 17 hrs ago0xb7f6cb7ffaf6c3ed1bd4fda6d4bdce4741f912e5 IN  DigitalNote: WXDN Token0 BNB0.00022214
0xa64593d83233e43ebd09ea460dc8cf66a113ad05578dd5e7bcb6a7dac29964c267191842021-04-20 2:51:171 day 23 hrs ago0x04485b99ddb6a1e8d59836add972b18573def8ce IN  DigitalNote: WXDN Token0 BNB0.00022214
0xcde573c5d48196e3c296a8a46aff811fbbb04c4990f17c343900f95d19a55e2367159332021-04-20 0:07:372 days 2 hrs ago0x1eb437701000882aa79f8ab0ccb7888a17698595 IN  DigitalNote: WXDN Token0 BNB0.00022214
0x79b560836e5a5a80f33233efb981e0cf41f2d13bd325635777f25f8bdc70875067130352021-04-19 21:40:212 days 4 hrs ago0x6f7d72535f3c3de52134cd2a9d5c040711fe8e53 IN  DigitalNote: WXDN Token0 BNB0.000255945
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OVERVIEW

DigitalNote is a robust Proof-of-Work/Proof-of-Stake hybrid blockchain with instant transactions and highly secure encrypted messaging features at its core.

Latest 22 internal transactions
Parent Txn Hash Block From To Value
0x638841917d6bdcaa011ef4193643410959927d1ebb5ba398b59cf09ecb2e1de654697412021-03-07 10:40:0045 days 15 hrs ago PancakeSwap: WXDN-BUSD DigitalNote: WXDN Token0 BNB
0x638841917d6bdcaa011ef4193643410959927d1ebb5ba398b59cf09ecb2e1de654697412021-03-07 10:40:0045 days 15 hrs ago PancakeSwap: WXDN-BUSD DigitalNote: WXDN Token0 BNB
0x2e3b23d180480549f9175a2f6651ec64cdaeb85c523a908c97bd2bbd5d469ff654673952021-03-07 8:42:4245 days 17 hrs ago PancakeSwap: WXDN-BUSD DigitalNote: WXDN Token0 BNB
0x2e3b23d180480549f9175a2f6651ec64cdaeb85c523a908c97bd2bbd5d469ff654673952021-03-07 8:42:4245 days 17 hrs ago PancakeSwap: WXDN-BUSD DigitalNote: WXDN Token0 BNB
0xa1c241bfc2a694e70649dce569ab3fd5ef34d97be2d2ed7d960a038664d6f89b54345302021-03-06 5:17:4746 days 20 hrs ago PancakeSwap: WXDN-BUSD DigitalNote: WXDN Token0 BNB
0xa1c241bfc2a694e70649dce569ab3fd5ef34d97be2d2ed7d960a038664d6f89b54345302021-03-06 5:17:4746 days 20 hrs ago PancakeSwap: WXDN-BUSD DigitalNote: WXDN Token0 BNB
0x9672f5289ab2c476c85829598b4c937cd70280a0da820bb52056b5b10513dda454335772021-03-06 4:30:0846 days 21 hrs ago PancakeSwap: WXDN-BUSD DigitalNote: WXDN Token0 BNB
0x9672f5289ab2c476c85829598b4c937cd70280a0da820bb52056b5b10513dda454335772021-03-06 4:30:0846 days 21 hrs ago PancakeSwap: WXDN-BUSD DigitalNote: WXDN Token0 BNB
0xb921b266f2b3d9c89390a94b6a6455a10e87c12bed82c399be559eb0808e323354328332021-03-06 3:52:5646 days 22 hrs ago PancakeSwap: WXDN-BUSD DigitalNote: WXDN Token0 BNB
0xb921b266f2b3d9c89390a94b6a6455a10e87c12bed82c399be559eb0808e323354328332021-03-06 3:52:5646 days 22 hrs ago PancakeSwap: WXDN-BUSD DigitalNote: WXDN Token0 BNB
0x2c711651189ccc5b272718ea7d86e82d27d862efe2486c689fe4ea9d7bb1355f54318032021-03-06 3:01:2646 days 23 hrs ago PancakeSwap: WXDN-BUSD DigitalNote: WXDN Token0 BNB
0x2c711651189ccc5b272718ea7d86e82d27d862efe2486c689fe4ea9d7bb1355f54318032021-03-06 3:01:2646 days 23 hrs ago PancakeSwap: Router DigitalNote: WXDN Token0 BNB
0x72b52f4186cb24c80c2f19f0e1ec81e280b76f5e38a71ea6414948e7904d5c3c54312522021-03-06 2:33:5346 days 23 hrs ago PancakeSwap: WXDN-BUSD DigitalNote: WXDN Token0 BNB
0x72b52f4186cb24c80c2f19f0e1ec81e280b76f5e38a71ea6414948e7904d5c3c54312522021-03-06 2:33:5346 days 23 hrs ago PancakeSwap: WXDN-BUSD DigitalNote: WXDN Token0 BNB
0x71717cbf44a10eab444bec477fb17a4472a22a92d2bc50bf0bd6c61653f87f2654204822021-03-05 17:35:2247 days 8 hrs ago PancakeSwap: WXDN-BUSD DigitalNote: WXDN Token0 BNB
0x71717cbf44a10eab444bec477fb17a4472a22a92d2bc50bf0bd6c61653f87f2654204822021-03-05 17:35:2247 days 8 hrs ago PancakeSwap: WXDN-BUSD DigitalNote: WXDN Token0 BNB
0x4fc0d5fea4af131379ce8aeb76252c5af9f1611b7822fc89665665c78734fcbf54179392021-03-05 15:28:1347 days 10 hrs ago PancakeSwap: WXDN-BUSD DigitalNote: WXDN Token0 BNB
0x4fc0d5fea4af131379ce8aeb76252c5af9f1611b7822fc89665665c78734fcbf54179392021-03-05 15:28:1347 days 10 hrs ago PancakeSwap: WXDN-BUSD DigitalNote: WXDN Token0 BNB
0x506f236b76c240fa340dbfb5299b23f39f59517235aa79c63cb0787d0ea1273753660252021-03-03 20:11:4949 days 6 hrs ago PancakeSwap: WXDN-BUSD DigitalNote: WXDN Token0 BNB
0x506f236b76c240fa340dbfb5299b23f39f59517235aa79c63cb0787d0ea1273753660252021-03-03 20:11:4949 days 6 hrs ago PancakeSwap: WXDN-BUSD DigitalNote: WXDN Token0 BNB
0x84947a00a55690789ff90774664be03a1dee810f1704e91c425641b3b242484a53634262021-03-03 18:01:5249 days 8 hrs ago PancakeSwap: WXDN-BUSD DigitalNote: WXDN Token0 BNB
0x84947a00a55690789ff90774664be03a1dee810f1704e91c425641b3b242484a53634262021-03-03 18:01:5249 days 8 hrs ago PancakeSwap: WXDN-BUSD DigitalNote: WXDN Token0 BNB
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Contract Source Code Verified (Exact Match)

Contract Name:
WrappedXDN

Compiler Version
v0.7.4+commit.3f05b770

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, MIT license

Contract Source Code (Solidity)

/**
 *Submitted for verification at BscScan.com on 2021-02-02
*/

// SPDX-License-Identifier: MIT

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

pragma solidity ^0.7.0;

/*
 * @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;
    }
}

// File: @openzeppelin/contracts/access/Ownable.sol



pragma solidity ^0.7.0;

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

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(_owner == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

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



pragma solidity ^0.7.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

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

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

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

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

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

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

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

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



pragma solidity ^0.7.0;

/**
 * @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.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

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

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

        return c;
    }

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

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

        return c;
    }

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

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

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



pragma solidity ^0.7.0;




/**
 * @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 {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_) {
        _name = name_;
        _symbol = symbol_;
        _decimals = 18;
    }

    /**
     * @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. 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 returns (uint8) {
        return _decimals;
    }

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

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view 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 {
        _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 { }
}


// File: @openzeppelin/contracts/token/ERC20/ERC20Burnable.sol


pragma solidity ^0.7.0;



/**
 * @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);
    }
}

// File: contracts/token/ERC20/behaviours/ERC20Mintable.sol


pragma solidity ^0.7.0;


/**
 * @title ERC20Mintable
 * @dev Implementation of the ERC20Mintable. Extension of {ERC20} that adds a minting behaviour.
 */
abstract contract ERC20Mintable is ERC20 {

    // indicates if minting is finished
    bool private _mintingFinished = false;

    /**
     * @dev Emitted during finish minting
     */
    event MintFinished();

    /**
     * @dev Tokens can be minted only before minting finished.
     */
    modifier canMint() {
        require(!_mintingFinished, "ERC20Mintable: minting is finished");
        _;
    }

    /**
     * @return if minting is finished or not.
     */
    function mintingFinished() public view returns (bool) {
        return _mintingFinished;
    }

    /**
     * @dev Function to mint tokens.
     *
     * WARNING: it allows everyone to mint new tokens. Access controls MUST be defined in derived contracts.
     *
     * @param account The address that will receive the minted tokens
     * @param amount The amount of tokens to mint
     */
    function mint(address account, uint256 amount) public canMint {
        _mint(account, amount);
    }

    /**
     * @dev Function to stop minting new tokens.
     *
     * WARNING: it allows everyone to finish minting. Access controls MUST be defined in derived contracts.
     */
    function finishMinting() public canMint {
        _finishMinting();
    }

    /**
     * @dev Function to stop minting new tokens.
     */
    function _finishMinting() internal virtual {
        _mintingFinished = true;

        emit MintFinished();
    }
}


// File: contracts/token/ERC20/WrappedXDN.sol


pragma solidity ^0.7.0;


/**
 * @title WrappedXDN
 * @dev Implementation of the WrappedXDN
 */
contract WrappedXDN is ERC20Mintable, ERC20Burnable, Ownable {

    constructor (
        )

        ERC20("Wrapped DigitalNote", "WXDN")
        payable
    {
        _setupDecimals(18);
        _mint(_msgSender(), 0);
    }

    /**
     * @dev Function to mint tokens.
     *
     * NOTE: restricting access to owner only. See {ERC20Mintable-mint}.
     *
     * @param account The address that will receive the minted tokens
     * @param amount The amount of tokens to mint
     */
    function _mint(address account, uint256 amount) internal override onlyOwner {
        super._mint(account, amount);
    }

    /**
     * @dev Function to stop minting new tokens.
     *
     * NOTE: restricting access to owner only. See {ERC20Mintable-finishMinting}.
     */
    function _finishMinting() internal override onlyOwner {
        super._finishMinting();
    }

}

Contract ABI

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Swarm Source

ipfs://1be3f5437a86598e624151a244306f2b72995c2deab4b02a244fe9dddc63ca55
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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