ETH Price: $3,063.12 (-4.02%)
Harmony

Token

Harmony ONE (1ONE)
 

Overview

Max Total Supply

8,457,275.37703545508398055 1ONE

Holders

3,309 (0.00%)

Market

Price

$0.01 @ 0.000004 ETH (-2.73%)

Onchain Market Cap

$113,001.57

Circulating Supply Market Cap

$190,651,668.38

Other Info

Token Contract (WITH 18 Decimals)

Balance
100 1ONE

Value
$1.34 ( ~0.000437462235441542 Eth) [0.0012%]
0xeb064cf2c3125a515204c1c64675257a478b2003
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OVERVIEW

Harmony is an open blockchain with data sharding and fast finality. Social finance and community AI can use their onchain tokens for micro-payments, smart contracts for market pricing, and zero-knowledge proofs for data privacy.

Market

Volume (24H):$11,339,554.49
Market Capitalization:$190,651,668.38
Circulating Supply:14,268,772,140.00 1ONE
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
Binance
ONE-USDT$0.0132
0.0000043 Eth
$3,853,199.00
280,888,543.900 ONE
23.3646%
2
Nami.Exchange
ONE-USDT$0.0131
0.0000043 Eth
$1,814,672.00
138,701,406.200 ONE
11.5373%
3
Nami.Exchange
ONE-VNST$0.0135
0.0000043 Eth
$1,667,565.00
123,953,506.100 ONE
10.3106%
4
Bibox
ONE-USDT$0.0131
0.0000043 Eth
$1,512,522.00
115,230,869.000 ONE
9.5850%
5
Byte Exchange
ONE-USDT$0.0134
0.0000043 Eth
$929,530.00
69,554,611.000 ONE
5.7856%
6
XT.COM
ONE-USDT$0.0132
0.0000043 Eth
$770,390.00
56,117,873.300 ONE
4.6679%
7
BTSE
ONE-USDT$0.0134
0.0000043 Eth
$673,549.00
50,233,801.077 ONE
4.1785%
8
OKX
ONE-USDT$0.0131
0.0000043 Eth
$543,659.00
39,730,993.370 ONE
3.3049%
9
CoinEx
ONE-USDT$0.0134
0.0000043 Eth
$451,897.00
32,696,697.744 ONE
2.7197%
10
DigiFinex
ONE-USDT$0.0131
0.0000043 Eth
$438,752.00
33,566,032.700 ONE
2.7921%
11
HTX
ONE-USDT$0.0131
0.0000043 Eth
$378,823.00
27,492,982.062 ONE
2.2869%
12
FameEX
ONE-USDT$0.0132
0.0000043 Eth
$297,375.00
21,663,627.454 ONE
1.8020%
13
FMFW.io
ONE-BTC$0.0132
0.0000043 Eth
$295,662.00
22,337,750.000 ONE
1.8581%
14
HitBTC
ONE-BTC$0.0131
0.0000043 Eth
$293,416.00
22,337,760.000 ONE
1.8581%
15
KuCoin
ONE-USDT$0.0131
0.0000043 Eth
$290,306.00
22,202,619.375 ONE
1.8468%
16
HitBTC
ONE-USDT$0.0132
0.0000043 Eth
$258,215.00
18,712,290.000 ONE
1.5565%
17
Bybit
ONE-USDT$0.0132
0.0000043 Eth
$219,081.00
15,914,689.750 ONE
1.3238%
18
Binance
ONE-BTC$0.0132
0.0000043 Eth
$161,852.00
12,207,137.000 ONE
1.0154%
19
Binance US
ONE-USDT$0.0133
0.0000043 Eth
$160,995.00
12,060,100.733 ONE
1.0032%
20
Bitget
ONE-USDT$0.0131
0.0000043 Eth
$118,425.00
8,575,420.000 ONE
0.7133%
21
Bilaxy
ONE-USDT$0.0134
0.0000043 Eth
$108,979.00
8,106,871.900 ONE
0.6743%
22
Bitvavo
ONE-EUR$0.0134
0.0000044 Eth
$99,607.00
7,451,425.914 ONE
0.6198%
23
BingX
ONE-USDT$0.0131
0.0000043 Eth
$99,060.00
7,242,463.205 ONE
0.6024%
24
MEXC
ONE-USDT$0.0132
0.0000043 Eth
$93,269.00
7,086,237.610 ONE
0.5894%
25
Tokenize
ONE-USD$0.0131
0.0000043 Eth
$88,026.00
6,734,931.074 ONE
0.5602%
26
Tokenize
ONE-SGD$0.0131
0.0000043 Eth
$87,962.00
6,729,459.487 ONE
0.5598%
27
Binance
ONE-TRY$0.0133
0.0000043 Eth
$87,677.00
6,388,808.800 ONE
0.5314%
28
Crypto.com Exchange
ONE-USDT$0.0133
0.0000043 Eth
$69,629.00
5,242,310.000 ONE
0.4361%
29
Bit2Me
ONE-USDT$0.0134
0.0000043 Eth
$40,261.00
2,955,674.000 ONE
0.2459%
30
Crypto.com Exchange
ONE-USD$0.0133
0.0000043 Eth
$38,019.00
2,858,560.000 ONE
0.2378%
31
Gate.io
ONE-USDT$0.0131
0.0000043 Eth
$37,552.00
2,754,186.900 ONE
0.2291%
32
NovaDAX
ONE-BRL$0.0135
0.0000044 Eth
$36,275.00
2,687,590.200 ONE
0.2236%
33
AscendEX (BitMax)
ONE-USDT$0.0132
0.0000043 Eth
$34,487.00
2,606,743.000 ONE
0.2168%
34
Bitrue
ONE-USDT$0.0131
0.0000043 Eth
$33,518.00
2,561,748.500 ONE
0.2131%
35
Pionex
ONE-USDT$0.0132
0.0000043 Eth
$31,072.00
2,265,285.070 ONE
0.1884%
36
OpenOcean
ETH-ONE$0.0167
0.0000050 Eth
$14,342.22
70.835 ETH
0.0000%
37
QMall
ONE-USDT$0.0131
0.0000043 Eth
$12,029.87
876,747.481 ONE
0.0729%
38
WEEX
ONE-USDT$0.0134
0.0000043 Eth
$9,258.80
674,433.000 ONE
0.0561%
39
CoinDCX
ONE-INR$0.0136
0.0000044 Eth
$7,133.41
0.000 ONE
0.0000%
40
EXMO
ONE-BTC$0.0131
0.0000043 Eth
$6,508.28
497,502.274 ONE
0.0414%
41
CoinEx
ONE-USDC$0.0132
0.0000043 Eth
$6,479.31
469,329.572 ONE
0.0390%
42
EXMO
ONE-USDT$0.0132
0.0000043 Eth
$5,674.96
430,826.221 ONE
0.0358%
43
TokoCrypto
ONE-USDT$0.0132
0.0000043 Eth
$5,655.82
427,832.761 ONE
0.0356%
44
CoinEx
ONE-BTC$0.0132
0.0000043 Eth
$3,878.72
288,192.830 ONE
0.0240%
45
Nominex
ONE-USDT$0.0131
0.0000043 Eth
$2,189.94
167,226.213 ONE
0.0139%
46
KuCoin
ONE-BTC$0.0132
0.0000043 Eth
$1,576.89
119,373.965 ONE
0.0099%
47
Bittime
ONE-IDR$0.0134
0.0000043 Eth
$1,506.83
114,265.020 ONE
0.0095%
48
WOO X
ONE-USDT$0.0133
0.0000043 Eth
$1,330.69
100,054.100 ONE
0.0083%
49
Nominex
ONE-BTC$0.0131
0.0000043 Eth
$745.82
56,874.000 ONE
0.0047%
50
Mudrex
ONE-USDT$0.0132
0.0000043 Eth
$572.06
43,492.776 ONE
0.0036%
51
ZebPay
ONE-INR$0.0138
0.0000045 Eth
$352.69
25,650.056 ONE
0.0021%
52
OKX
ONE-USDC$0.0134
0.0000044 Eth
$328.70
24,385.134 ONE
0.0020%
53
Energiswap
0XD001188EE1830425FD2B0FB21F6F3BB79BAB161E-0XA55F26319462355474A9F2C8790860776A329AA4$0.0134
0.0000043 Eth
$138.21
10,011.326 0XD001188EE1830425FD2B0FB21F6F3BB79BAB161E
0.0008%
54
Korbit
ONE-KRW$0.0135
0.0000044 Eth
$116.08
8,318.573 ONE
0.0007%
55
CEX.IO
ONE-USDT$0.0131
0.0000043 Eth
$77.86
5,620.603 ONE
0.0005%
56
CEX.IO
ONE-USD$0.0132
0.0000043 Eth
$27.81
2,050.631 ONE
0.0002%
57
ProBit Global
ONE-USDT$0.0206
0.0000066 Eth
$20.87
1,011.662 ONE
0.0001%
58
Nominex
ONE-TRY$0.0132
0.0000043 Eth
$17.64
1,336.334 ONE
0.0001%
59
Giottus
ONE-INR$0.0139
0.0000044 Eth
$10.40
751.048 ONE
0.0001%
60
ProBit Global
ONE-BTC$0.014
0.0000045 Eth
$9.64
687.500 ONE
0.0001%
61
TokoCrypto
ONE-BTC$0.0131
0.0000043 Eth
$9.20
700.000 ONE
0.0001%

Contract Source Code Verified (Exact Match)

Contract Name:
BridgedToken

Compiler Version
v0.5.17+commit.d19bba13

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, MIT license

Contract Source Code (Solidity)

/**
 *Submitted for verification at Etherscan.io on 2021-02-09
*/

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

pragma solidity ^0.5.0;

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

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

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

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

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

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

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

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

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

pragma solidity ^0.5.0;


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

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

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

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

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5,05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei.
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view returns (uint8) {
        return _decimals;
    }
}

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

pragma solidity ^0.5.0;

/*
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with GSN meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
contract Context {
    // Empty internal constructor, to prevent people from mistakenly deploying
    // an instance of this contract, which should be used via inheritance.
    constructor () internal { }
    // solhint-disable-previous-line no-empty-blocks

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

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

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

pragma solidity ^0.5.0;

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

        return c;
    }

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

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

        return c;
    }

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

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

        return c;
    }

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

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

        return c;
    }

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

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

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

pragma solidity ^0.5.0;




/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20Mintable}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin guidelines: functions revert instead
 * of returning `false` on failure. This behavior is nonetheless conventional
 * and does not conflict with the expectations of ERC20 applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20 {
    using SafeMath for uint256;

    mapping (address => uint256) private _balances;

    mapping (address => mapping (address => uint256)) private _allowances;

    uint256 private _totalSupply;

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

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address recipient, uint256 amount) public returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

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

    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20};
     *
     * Requirements:
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for `sender`'s tokens of at least
     * `amount`.
     */
    function transferFrom(address sender, address recipient, uint256 amount) public returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
        return true;
    }

    /**
     * @dev Moves tokens `amount` from `sender` to `recipient`.
     *
     * This is internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    function _transfer(address sender, address recipient, uint256 amount) internal {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements
     *
     * - `to` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal {
        require(account != address(0), "ERC20: mint to the zero address");

        _totalSupply = _totalSupply.add(amount);
        _balances[account] = _balances[account].add(amount);
        emit Transfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal {
        require(account != address(0), "ERC20: burn from the zero address");

        _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
        _totalSupply = _totalSupply.sub(amount);
        emit Transfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
     *
     * This is internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(address owner, address spender, uint256 amount) internal {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`.`amount` is then deducted
     * from the caller's allowance.
     *
     * See {_burn} and {_approve}.
     */
    function _burnFrom(address account, uint256 amount) internal {
        _burn(account, amount);
        _approve(account, _msgSender(), _allowances[account][_msgSender()].sub(amount, "ERC20: burn amount exceeds allowance"));
    }
}

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

pragma solidity ^0.5.0;



/**
 * @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).
 */
contract ERC20Burnable is Context, ERC20 {
    /**
     * @dev Destroys `amount` tokens from the caller.
     *
     * See {ERC20-_burn}.
     */
    function burn(uint256 amount) public {
        _burn(_msgSender(), amount);
    }

    /**
     * @dev See {ERC20-_burnFrom}.
     */
    function burnFrom(address account, uint256 amount) public {
        _burnFrom(account, amount);
    }
}

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

pragma solidity ^0.5.0;

/**
 * @title Roles
 * @dev Library for managing addresses assigned to a Role.
 */
library Roles {
    struct Role {
        mapping (address => bool) bearer;
    }

    /**
     * @dev Give an account access to this role.
     */
    function add(Role storage role, address account) internal {
        require(!has(role, account), "Roles: account already has role");
        role.bearer[account] = true;
    }

    /**
     * @dev Remove an account's access to this role.
     */
    function remove(Role storage role, address account) internal {
        require(has(role, account), "Roles: account does not have role");
        role.bearer[account] = false;
    }

    /**
     * @dev Check if an account has this role.
     * @return bool
     */
    function has(Role storage role, address account) internal view returns (bool) {
        require(account != address(0), "Roles: account is the zero address");
        return role.bearer[account];
    }
}

// File: @openzeppelin/contracts/access/roles/MinterRole.sol

pragma solidity ^0.5.0;



contract MinterRole is Context {
    using Roles for Roles.Role;

    event MinterAdded(address indexed account);
    event MinterRemoved(address indexed account);

    Roles.Role private _minters;

    constructor () internal {
        _addMinter(_msgSender());
    }

    modifier onlyMinter() {
        require(isMinter(_msgSender()), "MinterRole: caller does not have the Minter role");
        _;
    }

    function isMinter(address account) public view returns (bool) {
        return _minters.has(account);
    }

    function addMinter(address account) public onlyMinter {
        _addMinter(account);
    }

    function renounceMinter() public {
        _removeMinter(_msgSender());
    }

    function _addMinter(address account) internal {
        _minters.add(account);
        emit MinterAdded(account);
    }

    function _removeMinter(address account) internal {
        _minters.remove(account);
        emit MinterRemoved(account);
    }
}

// File: @openzeppelin/contracts/token/ERC20/ERC20Mintable.sol

pragma solidity ^0.5.0;



/**
 * @dev Extension of {ERC20} that adds a set of accounts with the {MinterRole},
 * which have permission to mint (create) new tokens as they see fit.
 *
 * At construction, the deployer of the contract is the only minter.
 */
contract ERC20Mintable is ERC20, MinterRole {
    /**
     * @dev See {ERC20-_mint}.
     *
     * Requirements:
     *
     * - the caller must have the {MinterRole}.
     */
    function mint(address account, uint256 amount) public onlyMinter returns (bool) {
        _mint(account, amount);
        return true;
    }
}

// File: contracts/lib/BridgedToken.sol

pragma solidity 0.5.17;




contract BridgedToken is ERC20Burnable, ERC20Detailed, ERC20Mintable {
    address public ethTokenAddr;
    constructor(
        address _ethTokenAddr,
        string memory name,
        string memory symbol,
        uint8 decimals
    ) public ERC20Detailed(name, symbol, decimals) {
        ethTokenAddr = _ethTokenAddr;
    }
}

Contract Security Audit

Contract ABI

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ability":"nonpayable","type":"function"},{"constant":false,"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":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"}]

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

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

-----Decoded View---------------
Arg [0] : _ethTokenAddr (address): 0x00eEeeEEeEEeeeeeEEEEEeeEeeEeEEeEEEeeeeEe
Arg [1] : name (string): Harmony ONE
Arg [2] : symbol (string): 1ONE
Arg [3] : decimals (uint8): 18

-----Encoded View---------------
8 Constructor Arguments found :
Arg [0] : 00000000000000000000000000eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000080
Arg [2] : 00000000000000000000000000000000000000000000000000000000000000c0
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000012
Arg [4] : 000000000000000000000000000000000000000000000000000000000000000b
Arg [5] : 4861726d6f6e79204f4e45000000000000000000000000000000000000000000
Arg [6] : 0000000000000000000000000000000000000000000000000000000000000004
Arg [7] : 314f4e4500000000000000000000000000000000000000000000000000000000


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Swarm Source

bzzr://c60e94bc1c48a6f1dce6b5c48bb03692d58ccdada6d08173cfc96128c2c5615d
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