Contract 0xf527d595c434dd6fd944954b76c6cebe1098a6a6

Contract Overview

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0 AVAX
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0x6e37188564757e69f0975739fd2a45b13e0146d41ad1ac332fc49f5451f0e920Approve39247682021-12-22 15:27:31280 days 10 hrs ago0x878ecdd898336dccc076ce0e16dabbf8f507ab9d IN 0xf527d595c434dd6fd944954b76c6cebe1098a6a60 AVAX0.00116265 25
0x8a6672a683bfbf6175bef21732bf3d483386a16e89263e6b8b796c73a996ea56Transfer Operato...36599982021-12-17 18:08:52285 days 8 hrs ago0x878ecdd898336dccc076ce0e16dabbf8f507ab9d IN 0xf527d595c434dd6fd944954b76c6cebe1098a6a60 AVAX0.00076675 25
0x5937b0bd67cb76a4617a4945ef51be6fff66ed13770eabc81a056556cc4b85f20x6080604036519602021-12-17 13:38:40285 days 12 hrs ago0x878ecdd898336dccc076ce0e16dabbf8f507ab9d IN  Create: HBond0 AVAX0.030297125 25
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0x9fa267315f3c01b930027ebee7b274e99cc606a3c8cd32b43548aee363c3e0fb41635592021-12-28 21:31:45274 days 4 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200xf527d595c434dd6fd944954b76c6cebe1098a6a60 AVAX
0x9fa267315f3c01b930027ebee7b274e99cc606a3c8cd32b43548aee363c3e0fb41635592021-12-28 21:31:45274 days 4 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200xf527d595c434dd6fd944954b76c6cebe1098a6a60 AVAX
0x4e82fae166b9b0cbdffb3ebc3beb639a929e9d64af19bdbdf1f32c3e2e05690041528572021-12-28 15:31:49274 days 10 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200xf527d595c434dd6fd944954b76c6cebe1098a6a60 AVAX
0x4e82fae166b9b0cbdffb3ebc3beb639a929e9d64af19bdbdf1f32c3e2e05690041528572021-12-28 15:31:49274 days 10 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200xf527d595c434dd6fd944954b76c6cebe1098a6a60 AVAX
0xf82822a732cdca7b62b1d0bcc0e06fe2d4745e10d513af95c873e3bcddc51eb441427362021-12-28 9:31:43274 days 16 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200xf527d595c434dd6fd944954b76c6cebe1098a6a60 AVAX
0xf82822a732cdca7b62b1d0bcc0e06fe2d4745e10d513af95c873e3bcddc51eb441427362021-12-28 9:31:43274 days 16 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200xf527d595c434dd6fd944954b76c6cebe1098a6a60 AVAX
0xe493cc5bfa46458515637a0fc24855394a3f349d100587a8631fb7e8c2ff78ee41326682021-12-28 3:31:42274 days 22 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200xf527d595c434dd6fd944954b76c6cebe1098a6a60 AVAX
0xe493cc5bfa46458515637a0fc24855394a3f349d100587a8631fb7e8c2ff78ee41326682021-12-28 3:31:42274 days 22 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200xf527d595c434dd6fd944954b76c6cebe1098a6a60 AVAX
0xa091e45bcfcd41d6a5723b7233bf6975f1fc1afb3dce3a575b36901f5b97c1ce41234952021-12-27 21:31:44275 days 4 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200xf527d595c434dd6fd944954b76c6cebe1098a6a60 AVAX
0xa091e45bcfcd41d6a5723b7233bf6975f1fc1afb3dce3a575b36901f5b97c1ce41234952021-12-27 21:31:44275 days 4 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200xf527d595c434dd6fd944954b76c6cebe1098a6a60 AVAX
0xdb03d094c9c5da2081f6759d15c23e90bbe8c36cd92b0f004cec80391ccc457341164862021-12-27 18:24:39275 days 7 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200xf527d595c434dd6fd944954b76c6cebe1098a6a60 AVAX
0xdb03d094c9c5da2081f6759d15c23e90bbe8c36cd92b0f004cec80391ccc457341164862021-12-27 18:24:39275 days 7 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200xf527d595c434dd6fd944954b76c6cebe1098a6a60 AVAX
0x2fd0a4c8becc7210fa3ce12c998a04e5767ff718dc29ff5be11667f356f0b32c41164152021-12-27 18:23:10275 days 7 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200xf527d595c434dd6fd944954b76c6cebe1098a6a60 AVAX
0x2fd0a4c8becc7210fa3ce12c998a04e5767ff718dc29ff5be11667f356f0b32c41164152021-12-27 18:23:10275 days 7 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200xf527d595c434dd6fd944954b76c6cebe1098a6a60 AVAX
0x76223d4d098aaab50b28b6a0fa1b85090502f9859dac70e8801b221e8961eaa241083812021-12-27 15:31:45275 days 10 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200xf527d595c434dd6fd944954b76c6cebe1098a6a60 AVAX
0x76223d4d098aaab50b28b6a0fa1b85090502f9859dac70e8801b221e8961eaa241083812021-12-27 15:31:45275 days 10 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200xf527d595c434dd6fd944954b76c6cebe1098a6a60 AVAX
0xeb0bcf9c135a3b81d987c87e2f766818a97751b732db82d30b2d26000f38580640831862021-12-26 21:52:10276 days 4 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200xf527d595c434dd6fd944954b76c6cebe1098a6a60 AVAX
0xeb0bcf9c135a3b81d987c87e2f766818a97751b732db82d30b2d26000f38580640831862021-12-26 21:52:10276 days 4 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200xf527d595c434dd6fd944954b76c6cebe1098a6a60 AVAX
0x74822fa70c7539dafdb75f6ec59cb0b619620205490cfc6e96d08a1e243e61cd40831832021-12-26 21:52:04276 days 4 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200xf527d595c434dd6fd944954b76c6cebe1098a6a60 AVAX
0x74822fa70c7539dafdb75f6ec59cb0b619620205490cfc6e96d08a1e243e61cd40831832021-12-26 21:52:04276 days 4 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200xf527d595c434dd6fd944954b76c6cebe1098a6a60 AVAX
0x80789e691c199c9510a9519d2c05421e78549dca0b17f9cc403e3417643fcee740831802021-12-26 21:51:57276 days 4 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200xf527d595c434dd6fd944954b76c6cebe1098a6a60 AVAX
0x80789e691c199c9510a9519d2c05421e78549dca0b17f9cc403e3417643fcee740831802021-12-26 21:51:57276 days 4 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200xf527d595c434dd6fd944954b76c6cebe1098a6a60 AVAX
0xfa374f9415a04742ed69ffc6bad967325d2e30c7a12ae89fc73d19dad9a11e2640627392021-12-26 3:31:42276 days 22 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200xf527d595c434dd6fd944954b76c6cebe1098a6a60 AVAX
0xfa374f9415a04742ed69ffc6bad967325d2e30c7a12ae89fc73d19dad9a11e2640627392021-12-26 3:31:42276 days 22 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200xf527d595c434dd6fd944954b76c6cebe1098a6a60 AVAX
0xb938dc32de15ce6cca0f27f455dea93e667127ed37dd263488a70bb60b75373d40559332021-12-25 21:31:44277 days 4 hrs ago 0x4a90a56525257133d4dda089a78990d1b1d826200xf527d595c434dd6fd944954b76c6cebe1098a6a60 AVAX
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Contract Source Code Verified (Exact Match)

Contract Name:
HBond

Compiler Version
v0.6.12+commit.27d51765

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, MIT license

Contract Source Code (Solidity)

/**
 *Submitted for verification at testnet.snowtrace.io on 2021-12-17
*/

// SPDX-License-Identifier: MIXED

// File @openzeppelin/contracts/utils/[email protected]
// 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;
    }
}

// File @openzeppelin/contracts/token/ERC20/[email protected]
// License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @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/[email protected]
// License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @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, 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;
    }
}

// File @openzeppelin/contracts/token/ERC20/[email protected]
// License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;



/**
 * @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_) 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 { }
}

// File @openzeppelin/contracts/token/ERC20/[email protected]
// License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;


/**
 * @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 @openzeppelin/contracts/GSN/[email protected]
// License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

// File @openzeppelin/contracts/access/[email protected]
// License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @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 () 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;
    }
}

// File contracts/owner/Operator.sol
// License-Identifier: MIT

pragma solidity 0.6.12;


contract Operator is Context, Ownable {
    address private _operator;

    event OperatorTransferred(address indexed previousOperator, address indexed newOperator);

    constructor() internal {
        _operator = _msgSender();
        emit OperatorTransferred(address(0), _operator);
    }

    function operator() public view returns (address) {
        return _operator;
    }

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

    function isOperator() public view returns (bool) {
        return _msgSender() == _operator;
    }

    function transferOperator(address newOperator_) public onlyOwner {
        _transferOperator(newOperator_);
    }

    function _transferOperator(address newOperator_) internal {
        require(newOperator_ != address(0), "operator: zero address given for new operator");
        emit OperatorTransferred(address(0), newOperator_);
        _operator = newOperator_;
    }
}

// File contracts/HBond.sol
// License-Identifier: MIT

pragma solidity 0.6.12;

/*
 _    _    ______    ______    _________    ______    _______     
| |  | |  |   ___|  |  __  \  |         |  |   ___|  |  _____|
| |__| |  |  |__    | |  | |  | |\   /| |  |  |__     \ \__
|  __  |  |   __|   | | /_/   | | \_/ | |  |   __|     \__ \
| |  | |  |  |___   | | \ \   | |     | |  |  |___    ____\ \
|_|  |_|  |______|  |_|  \_\  |_|     |_|  |______|  |_______|

*/
contract HBond is ERC20Burnable, Operator {
    /**
     * @notice Constructs the KITTY Bond ERC-20 contract.
     */
    constructor() public ERC20("Hermes Bond", "HBOND") {}

    /**
     * @notice Operator mints basis bonds to a recipient
     * @param recipient_ The address of recipient
     * @param amount_ The amount of basis bonds to mint to
     * @return whether the process has been done
     */
    function mint(address recipient_, uint256 amount_) public onlyOperator returns (bool) {
        uint256 balanceBefore = balanceOf(recipient_);
        _mint(recipient_, amount_);
        uint256 balanceAfter = balanceOf(recipient_);

        return balanceAfter > balanceBefore;
    }

    function burn(uint256 amount) public override {
        super.burn(amount);
    }

    function burnFrom(address account, uint256 amount) public override onlyOperator {
        super.burnFrom(account, amount);
    }
}

Contract ABI

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Swarm Source

ipfs://766e2d92cd805ea18c4c172e8882412543eb6184e31343091f4f6c632e2bdce2
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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