ETH Price: $3,802.03 (+7.75%)

Contract

0xf7C42B11adf5491b6213c9a9400fB7B853553b9B
 

Overview

ETH Balance

7 wei

Eth Value

Less Than $0.01 (@ $3,802.03/ETH)

Multichain Info

No addresses found
Transaction Hash
Method
Block
From
To
Burn All117319012021-01-26 14:38:111415 days ago1611671891IN
0xf7C42B11...853553b9B
0 ETH0.0022549891
Burn All116061082021-01-07 7:09:481434 days ago1610003388IN
0xf7C42B11...853553b9B
0 ETH0.00362869105
Burn All115756052021-01-02 14:42:051439 days ago1609598525IN
0xf7C42B11...853553b9B
0 ETH0.00514929149
Burn All115728492021-01-02 4:33:311439 days ago1609562011IN
0xf7C42B11...853553b9B
0 ETH0.0012441236
Burn All115728082021-01-02 4:24:571439 days ago1609561497IN
0xf7C42B11...853553b9B
0 ETH0.0012441236
Burn All115700302021-01-01 18:17:091439 days ago1609525029IN
0xf7C42B11...853553b9B
0 ETH0.0033176696
Burn All115700062021-01-01 18:11:571439 days ago1609524717IN
0xf7C42B11...853553b9B
0 ETH0.00355957103
Burn All115700052021-01-01 18:11:511439 days ago1609524711IN
0xf7C42B11...853553b9B
0 ETH0.00355957103
Burn All115700012021-01-01 18:11:071439 days ago1609524667IN
0xf7C42B11...853553b9B
0 ETH0.00355957103
Burn All115697962021-01-01 17:22:371440 days ago1609521757IN
0xf7C42B11...853553b9B
0 ETH0.0026610477
Burn All115697932021-01-01 17:22:141440 days ago1609521734IN
0xf7C42B11...853553b9B
0 ETH0.0025919275
Burn All115694742021-01-01 16:11:261440 days ago1609517486IN
0xf7C42B11...853553b9B
0 ETH0.0024553871.04895
Burn All115694612021-01-01 16:08:271440 days ago1609517307IN
0xf7C42B11...853553b9B
0 ETH0.0024205170.0400015
Burn All115694492021-01-01 16:06:161440 days ago1609517176IN
0xf7C42B11...853553b9B
0 ETH0.0027301679
Burn All115694452021-01-01 16:05:161440 days ago1609517116IN
0xf7C42B11...853553b9B
0 ETH0.0027992781
Approve115559442020-12-30 14:35:271442 days ago1609338927IN
0xf7C42B11...853553b9B
0 ETH0.00661065150
Approve115399602020-12-28 3:37:381444 days ago1609126658IN
0xf7C42B11...853553b9B
0 ETH0.0036989484
Approve115399072020-12-28 3:25:101444 days ago1609125910IN
0xf7C42B11...853553b9B
0 ETH0.0034347378
Approve115398972020-12-28 3:23:001444 days ago1609125780IN
0xf7C42B11...853553b9B
0 ETH0.0036989484
Approve115366362020-12-27 15:31:181445 days ago1609083078IN
0xf7C42B11...853553b9B
0 ETH0.01126988256
Approve115130372020-12-24 0:22:071448 days ago1608769327IN
0xf7C42B11...853553b9B
0 ETH0.01122892255
Approve115130302020-12-24 0:20:401448 days ago1608769240IN
0xf7C42B11...853553b9B
0 ETH0.01118489254
Approve115083422020-12-23 7:05:501449 days ago1608707150IN
0xf7C42B11...853553b9B
0 ETH0.0036098882.00000145
Transfer115033812020-12-22 12:54:231450 days ago1608641663IN
0xf7C42B11...853553b9B
0 ETH0.0012984436
VIEW ADVANCED FILTER

Latest 17 internal transactions

Advanced mode:
Parent Transaction Hash Block From To
117319012021-01-26 14:38:111415 days ago1611671891
0xf7C42B11...853553b9B
1.01074688 ETH
116061082021-01-07 7:09:481434 days ago1610003388
0xf7C42B11...853553b9B
42.81191062 ETH
115756052021-01-02 14:42:051439 days ago1609598525
0xf7C42B11...853553b9B
0.52053364 ETH
115728492021-01-02 4:33:311439 days ago1609562011
0xf7C42B11...853553b9B
3.69520832 ETH
115728082021-01-02 4:24:571439 days ago1609561497
0xf7C42B11...853553b9B
2.40412688 ETH
115700302021-01-01 18:17:091439 days ago1609525029
0xf7C42B11...853553b9B
10.7001729 ETH
115700062021-01-01 18:11:571439 days ago1609524717
0xf7C42B11...853553b9B
10.70297727 ETH
115700052021-01-01 18:11:511439 days ago1609524711
0xf7C42B11...853553b9B
10.7001729 ETH
115700012021-01-01 18:11:071439 days ago1609524667
0xf7C42B11...853553b9B
10.70297727 ETH
115697962021-01-01 17:22:371440 days ago1609521757
0xf7C42B11...853553b9B
9.24361736 ETH
115697932021-01-01 17:22:141440 days ago1609521734
0xf7C42B11...853553b9B
4.70790027 ETH
115694742021-01-01 16:11:261440 days ago1609517486
0xf7C42B11...853553b9B
10.53240997 ETH
115694612021-01-01 16:08:271440 days ago1609517307
0xf7C42B11...853553b9B
10.70297762 ETH
115694492021-01-01 16:06:161440 days ago1609517176
0xf7C42B11...853553b9B
10.70297762 ETH
115694452021-01-01 16:05:161440 days ago1609517116
0xf7C42B11...853553b9B
10.70297762 ETH
115693302021-01-01 15:42:301440 days ago1609515750
0xf7C42B11...853553b9B
149.8416872 ETH
115033392020-12-22 12:47:321450 days ago1608641252  Contract Creation0 ETH
Loading...
Loading

Similar Match Source Code
This contract matches the deployed Bytecode of the Source Code for Contract 0x0348a35a...452B2C838
The constructor portion of the code might be different and could alter the actual behaviour of the contract

Contract Name:
BondToken

Compiler Version
v0.6.6+commit.6c089d02

Optimization Enabled:
Yes with 20000 runs

Other Settings:
constantinople EvmVersion, None license

Contract Source Code (Solidity)

/**
 *Submitted for verification at Etherscan.io on 2020-10-17
*/

// File: contracts/util/TransferETHInterface.sol

pragma solidity 0.6.6;


interface TransferETHInterface {
    receive() external payable;

    event LogTransferETH(address indexed from, address indexed to, uint256 value);
}

// File: contracts/util/TransferETH.sol

pragma solidity 0.6.6;



abstract contract TransferETH is TransferETHInterface {
    receive() external override payable {
        emit LogTransferETH(msg.sender, address(this), msg.value);
    }

    function _hasSufficientBalance(uint256 amount) internal view returns (bool ok) {
        address thisContract = address(this);
        return amount <= thisContract.balance;
    }

    /**
     * @notice transfer `amount` ETH to the `recipient` account with emitting log
     */
    function _transferETH(
        address payable recipient,
        uint256 amount,
        string memory errorMessage
    ) internal {
        require(_hasSufficientBalance(amount), errorMessage);
        (bool success, ) = recipient.call{value: amount}("");
        require(success, "transferring Ether failed");
        emit LogTransferETH(address(this), recipient, amount);
    }

    function _transferETH(address payable recipient, uint256 amount) internal {
        _transferETH(recipient, amount, "TransferETH: transfer amount exceeds balance");
    }
}

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

pragma solidity ^0.6.0;

/*
 * @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 { }

    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/IERC20.sol

pragma solidity ^0.6.0;

/**
 * @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 ^0.6.0;

/**
 * @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) {
        // 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.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

// File: @openzeppelin/contracts/utils/Address.sol

pragma solidity ^0.6.2;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // According to EIP-1052, 0x0 is the value returned for not-yet created accounts
        // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
        // for accounts without code, i.e. `keccak256('')`
        bytes32 codehash;
        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
        // solhint-disable-next-line no-inline-assembly
        assembly { codehash := extcodehash(account) }
        return (codehash != accountHash && codehash != 0x0);
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (bool success, ) = recipient.call{ value: amount }("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }
}

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

pragma solidity ^0.6.0;





/**
 * @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 {ERC20MinterPauser}.
 *
 * 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;
    using Address for address;

    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 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 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 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: contracts/bondToken/BondTokenInterface.sol

pragma solidity 0.6.6;




interface BondTokenInterface is TransferETHInterface, IERC20 {
    event LogExpire(uint128 rateNumerator, uint128 rateDenominator, bool firstTime);

    function mint(address account, uint256 amount) external returns (bool success);

    function expire(uint128 rateNumerator, uint128 rateDenominator)
        external
        returns (bool firstTime);

    function burn(uint256 amount) external returns (bool success);

    function burnAll() external returns (uint256 amount);

    function isMinter(address account) external view returns (bool minter);

    function getRate() external view returns (uint128 rateNumerator, uint128 rateDenominator);
}

// File: contracts/util/DeployerRole.sol

pragma solidity 0.6.6;


abstract contract DeployerRole {
    address internal immutable _deployer;

    modifier onlyDeployer() {
        require(_isDeployer(msg.sender), "only deployer is allowed to call this function");
        _;
    }

    constructor() public {
        _deployer = msg.sender;
    }

    function _isDeployer(address account) internal view returns (bool) {
        return account == _deployer;
    }
}

// File: contracts/bondToken/BondToken.sol

pragma solidity 0.6.6;






contract BondToken is DeployerRole, BondTokenInterface, TransferETH, ERC20 {
    struct Frac128x128 {
        uint128 numerator;
        uint128 denominator;
    }

    Frac128x128 internal _rate;

    constructor(string memory name, string memory symbol) public ERC20(name, symbol) {
        _setupDecimals(8);
    }

    function mint(address account, uint256 amount)
        public
        virtual
        override
        onlyDeployer
        returns (bool success)
    {
        require(!isExpired(), "this token contract has expired");
        _mint(account, amount);
        return true;
    }

    function transfer(address recipient, uint256 amount)
        public
        override(ERC20, IERC20)
        returns (bool success)
    {
        _transfer(msg.sender, recipient, amount);
        return true;
    }

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public override(ERC20, IERC20) returns (bool success) {
        _transfer(sender, recipient, amount);
        _approve(
            sender,
            msg.sender,
            allowance(sender, msg.sender).sub(amount, "ERC20: transfer amount exceeds allowance")
        );
        return true;
    }

    /**
     * @dev Record the settlement price at maturity in the form of a fraction and let the bond
     * token expire.
     */
    function expire(uint128 rateNumerator, uint128 rateDenominator)
        public
        override
        onlyDeployer
        returns (bool isFirstTime)
    {
        isFirstTime = !isExpired();
        if (isFirstTime) {
            _setRate(Frac128x128(rateNumerator, rateDenominator));
        }

        emit LogExpire(rateNumerator, rateDenominator, isFirstTime);
    }

    function simpleBurn(address from, uint256 amount) public onlyDeployer returns (bool) {
        if (amount > balanceOf(from)) {
            return false;
        }

        _burn(from, amount);
        return true;
    }

    function burn(uint256 amount) public override returns (bool success) {
        if (!isExpired()) {
            return false;
        }

        _burn(msg.sender, amount);

        if (_rate.numerator != 0) {
            uint256 withdrawAmount = amount.mul(10**(18 - 8)).mul(_rate.numerator).div(
                _rate.denominator
            );
            _transferETH(msg.sender, withdrawAmount, "system error: insufficient balance");
        }

        return true;
    }

    function burnAll() public override returns (uint256 amount) {
        amount = balanceOf(msg.sender);
        bool success = burn(amount);
        if (!success) {
            amount = 0;
        }
    }

    /**
     * @dev rateDenominator never be zero due to div() function, thus initial _rateDenominator is 0
     * can be used for flag of non-expired;
     */
    function isExpired() public view returns (bool) {
        return _rate.denominator != 0;
    }

    function isMinter(address account) public override view returns (bool) {
        return _isDeployer(account);
    }

    function getRate()
        public
        override
        view
        returns (uint128 rateNumerator, uint128 rateDenominator)
    {
        rateNumerator = _rate.numerator;
        rateDenominator = _rate.denominator;
    }

    function _setRate(Frac128x128 memory rate) internal {
        require(
            rate.denominator != 0,
            "system error: the exchange rate must be non-negative number"
        );
        _rate = rate;
    }
}

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"string","name":"name","type":"string"},{"internalType":"string","name":"symbol","type":"string"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint128","name":"rateNumerator","type":"uint128"},{"indexed":false,"internalType":"uint128","name":"rateDenominator","type":"uint128"},{"indexed":false,"internalType":"bool","name":"firstTime","type":"bool"}],"name":"LogExpire","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"LogTransferETH","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"burn","outputs":[{"internalType":"bool","name":"success","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"burnAll","outputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"subtractedValue","type":"uint256"}],"name":"decreaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint128","name":"rateNumerator","type":"uint128"},{"internalType":"uint128","name":"rateDenominator","type":"uint128"}],"name":"expire","outputs":[{"internalType":"bool","name":"isFirstTime","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"getRate","outputs":[{"internalType":"uint128","name":"rateNumerator","type":"uint128"},{"internalType":"uint128","name":"rateDenominator","type":"uint128"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"addedValue","type":"uint256"}],"name":"increaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"isExpired","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"isMinter","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"mint","outputs":[{"internalType":"bool","name":"success","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"simpleBurn","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"success","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"success","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]

Deployed Bytecode

0x6080604052600436106101485760003560e01c8063679aefce116100c0578063a457c2d711610074578063aa271e1a11610059578063aa271e1a1461055a578063dd62ed3e1461059a578063f05fcdf2146105e257610186565b8063a457c2d7146104ce578063a9059cbb1461051457610186565b8063903d8e77116100a5578063903d8e771461046057806395d89b41146104a45780639975038c146104b957610186565b8063679aefce146103dc57806370a082311461042057610186565b80632f13b60c1161011757806339509351116100fc578063395093511461032657806340c10f191461036c57806342966c68146103b257610186565b80632f13b60c146102e6578063313ce567146102fb57610186565b806306fdde031461018b578063095ea7b31461021557806318160ddd1461026f57806323b872dd1461029657610186565b3661018657604080513481529051309133917fdd4e7375a5084e0c4cc4e1bfc7ba67beb26a368120ea78d2e0948123910bbf7c9181900360200190a3005b600080fd5b34801561019757600080fd5b506101a0610628565b6040805160208082528351818301528351919283929083019185019080838360005b838110156101da5781810151838201526020016101c2565b50505050905090810190601f1680156102075780820380516001836020036101000a031916815260200191505b509250505060405180910390f35b34801561022157600080fd5b5061025b6004803603604081101561023857600080fd5b5073ffffffffffffffffffffffffffffffffffffffff81351690602001356106dc565b604080519115158252519081900360200190f35b34801561027b57600080fd5b506102846106fa565b60408051918252519081900360200190f35b3480156102a257600080fd5b5061025b600480360360608110156102b957600080fd5b5073ffffffffffffffffffffffffffffffffffffffff813581169160208101359091169060400135610700565b3480156102f257600080fd5b5061025b610755565b34801561030757600080fd5b50610310610783565b6040805160ff9092168252519081900360200190f35b34801561033257600080fd5b5061025b6004803603604081101561034957600080fd5b5073ffffffffffffffffffffffffffffffffffffffff813516906020013561078c565b34801561037857600080fd5b5061025b6004803603604081101561038f57600080fd5b5073ffffffffffffffffffffffffffffffffffffffff81351690602001356107ed565b3480156103be57600080fd5b5061025b600480360360208110156103d557600080fd5b50356108cb565b3480156103e857600080fd5b506103f1610999565b604080516fffffffffffffffffffffffffffffffff938416815291909216602082015281519081900390910190f35b34801561042c57600080fd5b506102846004803603602081101561044357600080fd5b503573ffffffffffffffffffffffffffffffffffffffff166109ca565b34801561046c57600080fd5b5061025b6004803603604081101561048357600080fd5b506fffffffffffffffffffffffffffffffff813581169160200135166109f2565b3480156104b057600080fd5b506101a0610afe565b3480156104c557600080fd5b50610284610b7d565b3480156104da57600080fd5b5061025b600480360360408110156104f157600080fd5b5073ffffffffffffffffffffffffffffffffffffffff8135169060200135610ba5565b34801561052057600080fd5b5061025b6004803603604081101561053757600080fd5b5073ffffffffffffffffffffffffffffffffffffffff8135169060200135610c20565b34801561056657600080fd5b5061025b6004803603602081101561057d57600080fd5b503573ffffffffffffffffffffffffffffffffffffffff16610c2d565b3480156105a657600080fd5b50610284600480360360408110156105bd57600080fd5b5073ffffffffffffffffffffffffffffffffffffffff81358116916020013516610c38565b3480156105ee57600080fd5b5061025b6004803603604081101561060557600080fd5b5073ffffffffffffffffffffffffffffffffffffffff8135169060200135610c70565b60038054604080516020601f60027fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff6101006001881615020190951694909404938401819004810282018101909252828152606093909290918301828280156106d25780601f106106a7576101008083540402835291602001916106d2565b820191906000526020600020905b8154815290600101906020018083116106b557829003601f168201915b5050505050905090565b60006106f06106e9610cf2565b8484610cf6565b5060015b92915050565b60025490565b600061070d848484610e3d565b61074b843361074685604051806060016040528060288152602001611936602891396107398a33610c38565b919063ffffffff61101916565b610cf6565b5060019392505050565b60065470010000000000000000000000000000000090046fffffffffffffffffffffffffffffffff16151590565b60055460ff1690565b60006106f0610799610cf2565b8461074685600160006107aa610cf2565b73ffffffffffffffffffffffffffffffffffffffff908116825260208083019390935260409182016000908120918c16815292529020549063ffffffff6110ca16565b60006107f833611145565b61084d576040517f08c379a000000000000000000000000000000000000000000000000000000000815260040180806020018281038252602e8152602001806118ac602e913960400191505060405180910390fd5b610855610755565b156108c157604080517f08c379a000000000000000000000000000000000000000000000000000000000815260206004820152601f60248201527f7468697320746f6b656e20636f6e747261637420686173206578706972656400604482015290519081900360640190fd5b6106f08383611184565b60006108d5610755565b6108e157506000610994565b6108eb33836112c1565b6006546fffffffffffffffffffffffffffffffff161561099057600654600090610969906fffffffffffffffffffffffffffffffff700100000000000000000000000000000000820481169161095d9116610951876402540be40063ffffffff61141716565b9063ffffffff61141716565b9063ffffffff61148a16565b905061098e338260405180606001604052806022815260200161188a602291396114cc565b505b5060015b919050565b6006546fffffffffffffffffffffffffffffffff808216927001000000000000000000000000000000009092041690565b73ffffffffffffffffffffffffffffffffffffffff1660009081526020819052604090205490565b60006109fd33611145565b610a52576040517f08c379a000000000000000000000000000000000000000000000000000000000815260040180806020018281038252602e8152602001806118ac602e913960400191505060405180910390fd5b610a5a610755565b1590508015610aa457610aa46040518060400160405280856fffffffffffffffffffffffffffffffff168152602001846fffffffffffffffffffffffffffffffff1681525061165d565b604080516fffffffffffffffffffffffffffffffff8086168252841660208201528215158183015290517fcdcd2e977c58a9c82d799c0986ab5c6fe48d43a9b96bbf60a654b46728c6f6679181900360600190a192915050565b60048054604080516020601f60027fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff6101006001881615020190951694909404938401819004810282018101909252828152606093909290918301828280156106d25780601f106106a7576101008083540402835291602001916106d2565b6000610b88336109ca565b90506000610b95826108cb565b905080610ba157600091505b5090565b60006106f0610bb2610cf2565b84610746856040518060600160405280602581526020016119c86025913960016000610bdc610cf2565b73ffffffffffffffffffffffffffffffffffffffff908116825260208083019390935260409182016000908120918d1681529252902054919063ffffffff61101916565b60006106f0338484610e3d565b60006106f482611145565b73ffffffffffffffffffffffffffffffffffffffff918216600090815260016020908152604080832093909416825291909152205490565b6000610c7b33611145565b610cd0576040517f08c379a000000000000000000000000000000000000000000000000000000000815260040180806020018281038252602e8152602001806118ac602e913960400191505060405180910390fd5b610cd9836109ca565b821115610ce8575060006106f4565b6106f083836112c1565b3390565b73ffffffffffffffffffffffffffffffffffffffff8316610d62576040517f08c379a00000000000000000000000000000000000000000000000000000000081526004018080602001828103825260248152602001806119a46024913960400191505060405180910390fd5b73ffffffffffffffffffffffffffffffffffffffff8216610dce576040517f08c379a00000000000000000000000000000000000000000000000000000000081526004018080602001828103825260228152602001806118426022913960400191505060405180910390fd5b73ffffffffffffffffffffffffffffffffffffffff808416600081815260016020908152604080832094871680845294825291829020859055815185815291517f8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b9259281900390910190a3505050565b73ffffffffffffffffffffffffffffffffffffffff8316610ea9576040517f08c379a000000000000000000000000000000000000000000000000000000000815260040180806020018281038252602581526020018061197f6025913960400191505060405180910390fd5b73ffffffffffffffffffffffffffffffffffffffff8216610f15576040517f08c379a00000000000000000000000000000000000000000000000000000000081526004018080602001828103825260238152602001806117fd6023913960400191505060405180910390fd5b610f2083838361172f565b610f70816040518060600160405280602681526020016118646026913973ffffffffffffffffffffffffffffffffffffffff8616600090815260208190526040902054919063ffffffff61101916565b73ffffffffffffffffffffffffffffffffffffffff8085166000908152602081905260408082209390935590841681522054610fb2908263ffffffff6110ca16565b73ffffffffffffffffffffffffffffffffffffffff8084166000818152602081815260409182902094909455805185815290519193928716927fddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef92918290030190a3505050565b600081848411156110c2576040517f08c379a00000000000000000000000000000000000000000000000000000000081526004018080602001828103825283818151815260200191508051906020019080838360005b8381101561108757818101518382015260200161106f565b50505050905090810190601f1680156110b45780820380516001836020036101000a031916815260200191505b509250505060405180910390fd5b505050900390565b60008282018381101561113e57604080517f08c379a000000000000000000000000000000000000000000000000000000000815260206004820152601b60248201527f536166654d6174683a206164646974696f6e206f766572666c6f770000000000604482015290519081900360640190fd5b9392505050565b7f0000000000000000000000004b30647c1623a5d146304d265c51b4c211d6cde173ffffffffffffffffffffffffffffffffffffffff90811691161490565b73ffffffffffffffffffffffffffffffffffffffff821661120657604080517f08c379a000000000000000000000000000000000000000000000000000000000815260206004820152601f60248201527f45524332303a206d696e7420746f20746865207a65726f206164647265737300604482015290519081900360640190fd5b6112126000838361172f565b600254611225908263ffffffff6110ca16565b60025573ffffffffffffffffffffffffffffffffffffffff821660009081526020819052604090205461125e908263ffffffff6110ca16565b73ffffffffffffffffffffffffffffffffffffffff83166000818152602081815260408083209490945583518581529351929391927fddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef9281900390910190a35050565b73ffffffffffffffffffffffffffffffffffffffff821661132d576040517f08c379a000000000000000000000000000000000000000000000000000000000815260040180806020018281038252602181526020018061195e6021913960400191505060405180910390fd5b6113398260008361172f565b611389816040518060600160405280602281526020016118206022913973ffffffffffffffffffffffffffffffffffffffff8516600090815260208190526040902054919063ffffffff61101916565b73ffffffffffffffffffffffffffffffffffffffff83166000908152602081905260409020556002546113c2908263ffffffff61173416565b60025560408051828152905160009173ffffffffffffffffffffffffffffffffffffffff8516917fddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef9181900360200190a35050565b600082611426575060006106f4565b8282028284828161143357fe5b041461113e576040517f08c379a00000000000000000000000000000000000000000000000000000000081526004018080602001828103825260218152602001806119156021913960400191505060405180910390fd5b600061113e83836040518060400160405280601a81526020017f536166654d6174683a206469766973696f6e206279207a65726f000000000000815250611776565b6114d5826117f5565b819061153c576040517f08c379a000000000000000000000000000000000000000000000000000000000815260206004820181815283516024840152835190928392604490910191908501908083836000831561108757818101518382015260200161106f565b5060405160009073ffffffffffffffffffffffffffffffffffffffff85169084908381818185875af1925050503d8060008114611595576040519150601f19603f3d011682016040523d82523d6000602084013e61159a565b606091505b505090508061160a57604080517f08c379a000000000000000000000000000000000000000000000000000000000815260206004820152601960248201527f7472616e7366657272696e67204574686572206661696c656400000000000000604482015290519081900360640190fd5b60408051848152905173ffffffffffffffffffffffffffffffffffffffff86169130917fdd4e7375a5084e0c4cc4e1bfc7ba67beb26a368120ea78d2e0948123910bbf7c9181900360200190a350505050565b60208101516fffffffffffffffffffffffffffffffff166116c9576040517f08c379a000000000000000000000000000000000000000000000000000000000815260040180806020018281038252603b8152602001806118da603b913960400191505060405180910390fd5b8051600680546020909301516fffffffffffffffffffffffffffffffff908116700100000000000000000000000000000000029281167fffffffffffffffffffffffffffffffff0000000000000000000000000000000090941693909317909216179055565b505050565b600061113e83836040518060400160405280601e81526020017f536166654d6174683a207375627472616374696f6e206f766572666c6f770000815250611019565b600081836117df576040517f08c379a000000000000000000000000000000000000000000000000000000000815260206004820181815283516024840152835190928392604490910191908501908083836000831561108757818101518382015260200161106f565b5060008385816117eb57fe5b0495945050505050565b303110159056fe45524332303a207472616e7366657220746f20746865207a65726f206164647265737345524332303a206275726e20616d6f756e7420657863656564732062616c616e636545524332303a20617070726f766520746f20746865207a65726f206164647265737345524332303a207472616e7366657220616d6f756e7420657863656564732062616c616e636573797374656d206572726f723a20696e73756666696369656e742062616c616e63656f6e6c79206465706c6f79657220697320616c6c6f77656420746f2063616c6c20746869732066756e6374696f6e73797374656d206572726f723a207468652065786368616e67652072617465206d757374206265206e6f6e2d6e65676174697665206e756d626572536166654d6174683a206d756c7469706c69636174696f6e206f766572666c6f7745524332303a207472616e7366657220616d6f756e74206578636565647320616c6c6f77616e636545524332303a206275726e2066726f6d20746865207a65726f206164647265737345524332303a207472616e736665722066726f6d20746865207a65726f206164647265737345524332303a20617070726f76652066726f6d20746865207a65726f206164647265737345524332303a2064656372656173656420616c6c6f77616e63652062656c6f77207a65726fa264697066735822122067d5ac09826869f1fb77d8e93a21a2892912fd988b8f917a9f6013483862ab6964736f6c63430006060033

Deployed Bytecode Sourcemap

25751:3618:0:-:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;424:52;;;466:9;424:52;;;;459:4;;439:10;;424:52;;;;;;;;;25751:3618;;12:1:-1;9;2:12;15601:83:0;;5:9:-1;2:2;;;27:1;24;17:12;2:2;15601:83:0;;;:::i;:::-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;8:100:-1;33:3;30:1;27:10;8:100;;;90:11;;;84:18;71:11;;;64:39;52:2;45:10;8:100;;;12:14;15601:83:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;17707:169;;5:9:-1;2:2;;;27:1;24;17:12;2:2;17707:169:0;;;;;;15:2:-1;10:3;7:11;4:2;;;31:1;28;21:12;4:2;-1:-1;17707:169:0;;;;;;;;;:::i;:::-;;;;;;;;;;;;;;;;;;16676:100;;5:9:-1;2:2;;;27:1;24;17:12;2:2;16676:100:0;;;:::i;:::-;;;;;;;;;;;;;;;;26609:414;;5:9:-1;2:2;;;27:1;24;17:12;2:2;26609:414:0;;;;;;15:2:-1;10:3;7:11;4:2;;;31:1;28;21:12;4:2;-1:-1;26609:414:0;;;;;;;;;;;;;;;;;;:::i;28671:96::-;;5:9:-1;2:2;;;27:1;24;17:12;2:2;28671:96:0;;;:::i;16528:83::-;;5:9:-1;2:2;;;27:1;24;17:12;2:2;16528:83:0;;;:::i;:::-;;;;;;;;;;;;;;;;;;;19080:218;;5:9:-1;2:2;;;27:1;24;17:12;2:2;19080:218:0;;;;;;15:2:-1;10:3;7:11;4:2;;;31:1;28;21:12;4:2;-1:-1;19080:218:0;;;;;;;;;:::i;26086:287::-;;5:9:-1;2:2;;;27:1;24;17:12;2:2;26086:287:0;;;;;;15:2:-1;10:3;7:11;4:2;;;31:1;28;21:12;4:2;-1:-1;26086:287:0;;;;;;;;;:::i;27794:489::-;;5:9:-1;2:2;;;27:1;24;17:12;2:2;27794:489:0;;;;;;15:2:-1;10:3;7:11;4:2;;;31:1;28;21:12;4:2;-1:-1;27794:489:0;;:::i;28900:234::-;;5:9:-1;2:2;;;27:1;24;17:12;2:2;28900:234:0;;;:::i;:::-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;16839:119;;5:9:-1;2:2;;;27:1;24;17:12;2:2;16839:119:0;;;;;;15:2:-1;10:3;7:11;4:2;;;31:1;28;21:12;4:2;-1:-1;16839:119:0;;;;:::i;27167:385::-;;5:9:-1;2:2;;;27:1;24;17:12;2:2;27167:385:0;;;;;;15:2:-1;10:3;7:11;4:2;;;31:1;28;21:12;4:2;-1:-1;27167:385:0;;;;;;;;;;;:::i;15803:87::-;;5:9:-1;2:2;;;27:1;24;17:12;2:2;15803:87:0;;;:::i;28291:208::-;;5:9:-1;2:2;;;27:1;24;17:12;2:2;28291:208:0;;;:::i;19801:269::-;;5:9:-1;2:2;;;27:1;24;17:12;2:2;19801:269:0;;;;;;15:2:-1;10:3;7:11;4:2;;;31:1;28;21:12;4:2;-1:-1;19801:269:0;;;;;;;;;:::i;26381:220::-;;5:9:-1;2:2;;;27:1;24;17:12;2:2;26381:220:0;;;;;;15:2:-1;10:3;7:11;4:2;;;31:1;28;21:12;4:2;-1:-1;26381:220:0;;;;;;;;;:::i;28775:117::-;;5:9:-1;2:2;;;27:1;24;17:12;2:2;28775:117:0;;;;;;15:2:-1;10:3;7:11;4:2;;;31:1;28;21:12;4:2;-1:-1;28775:117:0;;;;:::i;17409:151::-;;5:9:-1;2:2;;;27:1;24;17:12;2:2;17409:151:0;;;;;;15:2:-1;10:3;7:11;4:2;;;31:1;28;21:12;4:2;-1:-1;17409:151:0;;;;;;;;;;;:::i;27560:226::-;;5:9:-1;2:2;;;27:1;24;17:12;2:2;27560:226:0;;;;;;15:2:-1;10:3;7:11;4:2;;;31:1;28;21:12;4:2;-1:-1;27560:226:0;;;;;;;;;:::i;15601:83::-;15671:5;15664:12;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;15638:13;;15664:12;;15671:5;;15664:12;;15671:5;15664:12;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;15601:83;:::o;17707:169::-;17790:4;17807:39;17816:12;:10;:12::i;:::-;17830:7;17839:6;17807:8;:39::i;:::-;-1:-1:-1;17864:4:0;17707:169;;;;;:::o;16676:100::-;16756:12;;16676:100;:::o;26609:414::-;26756:12;26781:36;26791:6;26799:9;26810:6;26781:9;:36::i;:::-;26828:165;26851:6;26872:10;26897:85;26931:6;26897:85;;;;;;;;;;;;;;;;;:29;26907:6;26915:10;26897:9;:29::i;:::-;:33;:85;;:33;:85;:::i;:::-;26828:8;:165::i;:::-;-1:-1:-1;27011:4:0;26609:414;;;;;:::o;28671:96::-;28737:5;:17;;;;;;:22;;;28671:96::o;16528:83::-;16594:9;;;;16528:83;:::o;19080:218::-;19168:4;19185:83;19194:12;:10;:12::i;:::-;19208:7;19217:50;19256:10;19217:11;:25;19229:12;:10;:12::i;:::-;19217:25;;;;;;;;;;;;;;;;;;-1:-1:-1;19217:25:0;;;:34;;;;;;;;;;;:50;:38;:50;:::i;26086:287::-;26224:12;25377:23;25389:10;25377:11;:23::i;:::-;25369:82;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;26263:11:::1;:9;:11::i;:::-;26262:12;26254:56;;;::::0;;::::1;::::0;;::::1;;::::0;::::1;::::0;::::1;::::0;;;;::::1;::::0;;;;;;;;;;;;;::::1;;26321:22;26327:7;26336:6;26321:5;:22::i;27794:489::-:0;27849:12;27879:11;:9;:11::i;:::-;27874:57;;-1:-1:-1;27914:5:0;27907:12;;27874:57;27943:25;27949:10;27961:6;27943:5;:25::i;:::-;27985:5;:15;;;:20;27981:271;;28115:5;:17;28022:22;;28047:100;;28115:17;;;;;;;28047:45;;28076:15;28047:24;:6;28058:12;28047:24;:10;:24;:::i;:::-;:28;:45;:28;:45;:::i;:::-;:49;:100;:49;:100;:::i;:::-;28022:125;;28162:78;28175:10;28187:14;28162:78;;;;;;;;;;;;;;;;;:12;:78::i;:::-;27981:271;;-1:-1:-1;28271:4:0;27794:489;;;;:::o;28900:234::-;29065:5;:15;;;;;;29109:17;;;;;;28900:234::o;16839:119::-;16932:18;;16905:7;16932:18;;;;;;;;;;;;16839:119::o;27167:385::-;27305:16;25377:23;25389:10;25377:11;:23::i;:::-;25369:82;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;27354:11:::1;:9;:11::i;:::-;27353:12;27339:26;;27380:11;27376:97;;;27408:53;27417:43;;;;;;;;27429:13;27417:43;;;;;;27444:15;27417:43;;;;::::0;27408:8:::1;:53::i;:::-;27490:54;::::0;;::::1;::::0;;::::1;::::0;;;::::1;;::::0;::::1;::::0;;::::1;;::::0;;;;;;::::1;::::0;;;;;;;::::1;27167:385:::0;;;;:::o;15803:87::-;15875:7;15868:14;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;15842:13;;15868:14;;15875:7;;15868:14;;15875:7;15868:14;;;;;;;;;;;;;;;;;;;;;;;;28291:208;28335:14;28371:21;28381:10;28371:9;:21::i;:::-;28362:30;;28403:12;28418;28423:6;28418:4;:12::i;:::-;28403:27;;28446:7;28441:51;;28479:1;28470:10;;28441:51;28291:208;;:::o;19801:269::-;19894:4;19911:129;19920:12;:10;:12::i;:::-;19934:7;19943:96;19982:15;19943:96;;;;;;;;;;;;;;;;;:11;:25;19955:12;:10;:12::i;:::-;19943:25;;;;;;;;;;;;;;;;;;-1:-1:-1;19943:25:0;;;:34;;;;;;;;;;;:96;;:38;:96;:::i;26381:220::-;26501:12;26531:40;26541:10;26553:9;26564:6;26531:9;:40::i;28775:117::-;28840:4;28864:20;28876:7;28864:11;:20::i;17409:151::-;17525:18;;;;17498:7;17525:18;;;:11;:18;;;;;;;;:27;;;;;;;;;;;;;17409:151::o;27560:226::-;27639:4;25377:23;25389:10;25377:11;:23::i;:::-;25369:82;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;27669:15:::1;27679:4;27669:9;:15::i;:::-;27660:6;:24;27656:69;;;-1:-1:-1::0;27708:5:0::1;27701:12;;27656:69;27737:19;27743:4;27749:6;27737:5;:19::i;2164:106::-:0;2252:10;2164:106;:::o;22948:346::-;23050:19;;;23042:68;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;23129:21;;;23121:68;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;23202:18;;;;;;;;:11;:18;;;;;;;;:27;;;;;;;;;;;;;:36;;;23254:32;;;;;;;;;;;;;;;;;22948:346;;;:::o;20560:539::-;20666:20;;;20658:70;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;20747:23;;;20739:71;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;20823:47;20844:6;20852:9;20863:6;20823:20;:47::i;:::-;20903:71;20925:6;20903:71;;;;;;;;;;;;;;;;;:17;;;:9;:17;;;;;;;;;;;;:71;;:21;:71;:::i;:::-;20883:17;;;;:9;:17;;;;;;;;;;;:91;;;;21008:20;;;;;;;:32;;21033:6;21008:32;:24;:32;:::i;:::-;20985:20;;;;:9;:20;;;;;;;;;;;;:55;;;;21056:35;;;;;;;20985:20;;21056:35;;;;;;;;;;;;;20560:539;;;:::o;7117:192::-;7203:7;7239:12;7231:6;;;;7223:29;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;23:1:-1;8:100;33:3;30:1;27:10;8:100;;;90:11;;;84:18;71:11;;;64:39;52:2;45:10;8:100;;;12:14;7223:29:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;;;7275:5:0;;;7117:192::o;6230:181::-;6288:7;6320:5;;;6344:6;;;;6336:46;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;6402:1;6230:181;-1:-1:-1;;;6230:181:0:o;25549:113::-;25645:9;25634:20;;;;;;;;25549:113::o;21380:378::-;21464:21;;;21456:65;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;21534:49;21563:1;21567:7;21576:6;21534:20;:49::i;:::-;21611:12;;:24;;21628:6;21611:24;:16;:24;:::i;:::-;21596:12;:39;21667:18;;;:9;:18;;;;;;;;;;;:30;;21690:6;21667:30;:22;:30;:::i;:::-;21646:18;;;:9;:18;;;;;;;;;;;:51;;;;21713:37;;;;;;;21646:18;;:9;;21713:37;;;;;;;;;;21380:378;;:::o;22090:418::-;22174:21;;;22166:67;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;22246:49;22267:7;22284:1;22288:6;22246:20;:49::i;:::-;22329:68;22352:6;22329:68;;;;;;;;;;;;;;;;;:18;;;:9;:18;;;;;;;;;;;;:68;;:22;:68;:::i;:::-;22308:18;;;:9;:18;;;;;;;;;;:89;22423:12;;:24;;22440:6;22423:24;:16;:24;:::i;:::-;22408:12;:39;22463:37;;;;;;;;22489:1;;22463:37;;;;;;;;;;;;;22090:418;;:::o;7560:471::-;7618:7;7863:6;7859:47;;-1:-1:-1;7893:1:0;7886:8;;7859:47;7930:5;;;7934:1;7930;:5;:1;7954:5;;;;;:10;7946:56;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;8499:132;8557:7;8584:39;8588:1;8591;8584:39;;;;;;;;;;;;;;;;;:3;:39::i;783:390::-;938:29;960:6;938:21;:29::i;:::-;969:12;930:52;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;27:10:-1;;8:100;;90:11;;;84:18;71:11;;;64:39;52:2;45:10;8:100;;930:52:0;-1:-1:-1;1012:33:0;;994:12;;1012:14;;;;1034:6;;994:12;1012:33;994:12;1012:33;1034:6;1012:14;:33;;;;;;;12:1:-1;19;14:27;;;;67:4;61:11;56:16;;134:4;130:9;123:4;105:16;101:27;97:43;94:1;90:51;84:4;77:65;157:16;154:1;147:27;211:16;208:1;201:4;198:1;194:12;179:49;5:228;;14:27;32:4;27:9;;5:228;;993:52:0;;;1064:7;1056:45;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;1117:48;;;;;;;;;;;;1140:4;;1117:48;;;;;;;;;783:390;;;;:::o;29142:224::-;29227:16;;;;:21;;29205:130;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;29346:12;;:5;:12;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;29142:224::o;24319:92::-;;;;:::o;6686:136::-;6744:7;6771:43;6775:1;6778;6771:43;;;;;;;;;;;;;;;;;:3;:43::i;9119:345::-;9205:7;9307:12;9300:5;9292:28;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;27:10:-1;;8:100;;90:11;;;84:18;71:11;;;64:39;52:2;45:10;8:100;;9292:28:0;;9331:9;9347:1;9343;:5;;;;;;;9119:345;-1:-1:-1;;;;;9119:345:0:o;492:182::-;613:4;646:20;-1:-1:-1;636:30:0;;492:182::o

Swarm Source

ipfs://67d5ac09826869f1fb77d8e93a21a2892912fd988b8f917a9f6013483862ab69

Block Transaction Difficulty Gas Used Reward
View All Blocks Produced

Block Uncle Number Difficulty Gas Used Reward
View All Uncles
Loading...
Loading
Loading...
Loading

Validator Index Block Amount
View All Withdrawals

Transaction Hash Block Value Eth2 PubKey Valid
View All Deposits
Loading...
Loading
[ Download: CSV Export  ]
[ Download: CSV Export  ]

A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.