ETH Price: $2,146.59 (+1.74%)

Token

Tether USD (USDT)
 

Overview

Max Total Supply

75,918,584,460.692261 USDT

Holders

6,985,102 ( 0.066%)

Market

Price

$1.00 @ 0.000466 ETH (+0.05%)

Onchain Market Cap

$75,896,643,989.78

Circulating Supply Market Cap

$142,467,304,232.00

Other Info

Token Contract (WITH 6 Decimals)

Balance
0.000088 USDT

Value
$0.00 ( ~0 Eth) [0.0000%]
0xc7c27de301d62fd00774783c79bea25057791ecc
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OVERVIEW

Tether gives you the joint benefits of open blockchain technology and traditional currency by converting your cash into a stable digital currency equivalent.

Market

Volume (24H):$98,160,048,526.00
Market Capitalization:$142,467,304,232.00
Circulating Supply:142,508,685,217.00 USDT
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
Binance
BTC-USDT$1.003
0.0004665 Eth
$4,777,058,185.00
56,365.762 BTC
0.0005%
2
Pionex
BTC-USDT$0.999
0.0004672 Eth
$2,798,573,186.00
33,101.470 BTC
0.0003%
3
Binance
ETH-USDT$0.9993
0.0004643 Eth
$2,645,756,025.00
1,265,544.054 ETH
0.0102%
4
OrangeX
BTC-USDT$0.9997
0.0004673 Eth
$2,639,334,164.00
31,232.433 BTC
0.0003%
5
Crypto.com Exchange
BTC-USDT$1.001
0.0004659 Eth
$2,575,172,740.00
29,523.818 BTC
0.0002%
6
FameEX
BTC-USDT$0.9994
0.0004676 Eth
$2,211,939,504.00
26,131.369 BTC
0.0002%
7
BVOX
BTC-USDT$0.9983
0.0004683 Eth
$2,188,358,890.00
25,929.744 BTC
0.0002%
8
Crypto.com Exchange
ETH-USDT$0.9987
0.0004660 Eth
$1,813,737,832.00
847,509.591 ETH
0.0068%
9
OKX
BTC-USDT$1.003
0.0004665 Eth
$1,692,050,827.00
19,978.471 BTC
0.0002%
10
CoinW
BTC-USDT$0.9997
0.0004673 Eth
$1,615,252,526.00
18,550.467 BTC
0.0001%
11
MEXC
BTC-USDT$0.9998
0.0004673 Eth
$1,588,080,852.00
18,256.203 BTC
0.0001%
12
Binance
USDC-USDT$1.003
0.0004665 Eth
$1,541,575,165.00
1,536,819,486.000 USDC
12.3959%
13
BitMart
BTC-USDT$1.003
0.0004665 Eth
$1,482,630,443.00
17,016.793 BTC
0.0001%
14
Binance
SOL-USDT$1.00
0.0004676 Eth
$1,459,428,026.00
10,551,861.955 SOL
0.0851%
15
WhiteBIT
BTC-USDT$1.003
0.0004665 Eth
$1,441,854,099.00
16,475.752 BTC
0.0001%
16
Bitget
BTC-USDT$1.003
0.0004665 Eth
$1,378,633,890.00
16,272.531 BTC
0.0001%
17
Bybit
BTC-USDT$0.9999
0.0004672 Eth
$1,368,300,566.00
16,176.186 BTC
0.0001%
18
DigiFinex
BTC-USDT$1.003
0.0004665 Eth
$1,239,054,627.00
14,156.178 BTC
0.0001%
19
LATOKEN
BTC-USDT$0.9994
0.0004676 Eth
$1,091,527,851.00
12,530.474 BTC
0.0001%
20
Toobit
BTC-USDT$0.9994
0.0004676 Eth
$1,083,301,926.00
12,812.806 BTC
0.0001%
21
Gate.io
BTC-USDT$0.9999
0.0004672 Eth
$1,023,103,280.00
12,133.056 BTC
0.0001%
22
AscendEX (BitMax)
BTC-USDT$0.9999
0.0004672 Eth
$960,534,708.00
11,008.137 BTC
0.0001%
23
XT.COM
BTC-USDT$0.9998
0.0004678 Eth
$933,491,367.00
11,046.823 BTC
0.0001%
24
Binance
ADA-USDT$0.9996
0.0004644 Eth
$931,260,485.00
1,106,570,088.200 ADA
8.9256%
25
Gate.io
ETH-USDT$0.9999
0.0004672 Eth
$927,035,547.00
443,491.502 ETH
0.0036%
26
P2B
BTC-USDT$0.9988
0.0004672 Eth
$839,901,269.00
9,668.164 BTC
0.0001%
27
OKX
ETH-USDT$0.9999
0.0004666 Eth
$809,499,145.00
387,970.372 ETH
0.0031%
28
Bitget
ETH-USDT$1.003
0.0004665 Eth
$752,468,679.00
358,852.403 ETH
0.0029%
29
Ourbit
BTC-USDT$0.9997
0.0004673 Eth
$732,072,208.00
8,667.426 BTC
0.0001%
30
Bitunix
BTC-USDT$1.002
0.0004691 Eth
$712,536,162.00
8,177.604 BTC
0.0001%
31
Hotcoin
BTC-USDT$0.9997
0.0004682 Eth
$693,012,765.00
7,968.299 BTC
0.0001%
32
MEXC
ETH-USDT$0.9994
0.0004670 Eth
$649,573,997.00
302,546.744 ETH
0.0024%
33
BitMart
ETH-USDT$0.999
0.0004672 Eth
$564,542,622.00
263,818.498 ETH
0.0021%
34
BigONE
BTC-USDT$0.9997
0.0004673 Eth
$561,672,413.00
6,432.339 BTC
0.0001%
35
CoinW
ETH-USDT$0.9998
0.0004673 Eth
$554,812,557.00
259,180.536 ETH
0.0021%
36
HTX
BTC-USDT$0.9999
0.0004666 Eth
$546,624,728.00
6,459.285 BTC
0.0001%
37
XT.COM
ETH-USDT$0.9998
0.0004673 Eth
$519,132,136.00
248,126.631 ETH
0.0020%
38
AscendEX (BitMax)
ETH-USDT$0.9999
0.0004672 Eth
$515,676,978.00
240,142.603 ETH
0.0019%
39
Tapbit
BTC-USDT$0.9997
0.0004673 Eth
$496,512,919.00
5,878.549 BTC
0.0000%
40
Bybit
ETH-USDT$0.9999
0.0004672 Eth
$471,914,233.00
225,983.439 ETH
0.0018%
41
LATOKEN
ETH-USDT$0.9998
0.0004682 Eth
$470,453,225.00
219,999.904 ETH
0.0018%
42
Bitget
SOL-USDT$1.003
0.0004665 Eth
$465,531,497.00
3,359,439.967 SOL
0.0271%
43
Coinbase Exchange
USDT-USD$0.9998
0.0004652 Eth
$422,317,080.00
422,414,235.520 USDT
3.4072%
44
LBank
BTC-USDT$0.9999
0.0004672 Eth
$409,512,733.00
4,690.823 BTC
0.0000%
45
OKX
SOL-USDT$0.9999
0.0004666 Eth
$407,159,781.00
2,947,190.845 SOL
0.0238%
46
Bybit
XRP-USDT$0.9999
0.0004672 Eth
$399,362,856.00
168,597,441.690 XRP
1.3599%
47
Binance
DOGE-USDT$0.9999
0.0004678 Eth
$394,423,950.00
2,042,448,533.000 DOGE
16.4743%
48
DigiFinex
ETH-USDT$1.003
0.0004665 Eth
$393,735,889.00
182,825.170 ETH
0.0015%
49
Bybit
SOL-USDT$0.9999
0.0004672 Eth
$388,223,301.00
2,811,531.096 SOL
0.0227%
50
KuCoin
BTC-USDT$0.9999
0.0004666 Eth
$379,859,384.00
4,350.624 BTC
0.0000%
51
Biconomy.com
BTC-USDT$1.00
0.0004681 Eth
$369,373,635.00
4,365.700 BTC
0.0000%
52
P2B
ETH-USDT$0.9999
0.0004673 Eth
$365,544,288.00
170,694.467 ETH
0.0014%
53
Binance
SUI-USDT$1.00
0.0004676 Eth
$360,804,032.00
147,337,677.300 SUI
1.1884%
54
Bitget
XRP-USDT$1.003
0.0004665 Eth
$352,631,601.00
148,527,991.402 XRP
1.1980%
55
Bitget
BGB-USDT$1.003
0.0004665 Eth
$335,584,774.00
80,155,584.017 BGB
0.6465%
56
Gate.io
XRP-USDT$0.9999
0.0004672 Eth
$320,128,411.00
134,979,752.114 XRP
1.0887%
57
Bitunix
ETH-USDT$1.002
0.0004691 Eth
$306,520,220.00
143,124.347 ETH
0.0012%
58
KuCoin
ETH-USDT$0.9999
0.0004666 Eth
$305,456,846.00
142,158.003 ETH
0.0011%
59
WEEX
XRP-USDT$1.002
0.0004691 Eth
$300,977,116.00
122,902,971.901 XRP
0.9913%
60
Binance
BNB-USDT$1.003
0.0004665 Eth
$281,542,625.00
495,409.409 BNB
0.0040%
61
Ourbit
ETH-USDT$1.00
0.0004674 Eth
$281,414,882.00
134,272.555 ETH
0.0011%
62
Binance
TRX-USDT$1.003
0.0004665 Eth
$272,859,661.00
1,161,523,090.200 TRX
9.3688%
63
Gate.io
SOL-USDT$0.9999
0.0004672 Eth
$271,637,256.00
1,967,287.478 SOL
0.0159%
64
Binance
LTC-USDT$1.00
0.0004675 Eth
$260,521,505.00
2,538,294.890 LTC
0.0205%
65
Hotcoin
ETH-USDT$0.9997
0.0004673 Eth
$242,469,344.00
113,203.498 ETH
0.0009%
66
Bybit
USDC-USDT$0.9999
0.0004672 Eth
$231,220,468.00
231,137,956.660 USDC
1.8644%
67
Hibt
BTC-USDT$0.9998
0.0004673 Eth
$227,168,532.00
2,690.049 BTC
0.0000%
68
OrangeX
ADA-USDT$0.9999
0.0004672 Eth
$222,913,794.00
265,215,745.000 ADA
2.1392%
69
LBank
ETH-USDT$0.9999
0.0004672 Eth
$219,287,247.00
102,070.596 ETH
0.0008%
70
Coinstore
ETH-USDT$0.9985
0.0004682 Eth
$216,332,381.00
103,224.729 ETH
0.0008%
71
BYDFi
BTC-USDT$1.00
0.0004681 Eth
$215,230,307.00
2,469.041 BTC
0.0000%
72
OKX
XRP-USDT$0.9999
0.0004666 Eth
$197,403,747.00
83,169,047.249 XRP
0.6708%
73
P2B
ADA-USDT$0.9999
0.0004673 Eth
$191,711,127.00
209,355,685.100 ADA
1.6887%
74
OKX
PI-USDT$0.9999
0.0004672 Eth
$185,598,355.00
106,421,247.330 PI
0.8584%
75
KuCoin
XRP-USDT$0.9999
0.0004666 Eth
$184,455,333.00
75,238,838.956 XRP
0.6069%
76
Binance
HBAR-USDT$0.9929
0.0004651 Eth
$179,169,306.00
776,122,426.000 HBAR
6.2602%
77
Hibt
ETH-USDT$1.00
0.0004623 Eth
$168,836,942.00
80,930.980 ETH
0.0007%
78
OKX
ADA-USDT$0.9999
0.0004666 Eth
$168,298,898.00
198,914,186.972 ADA
1.6044%
79
OKX
DOGE-USDT$0.9999
0.0004666 Eth
$167,809,011.00
868,095,129.428 DOGE
7.0020%
80
LATOKEN
USDC-USDT$0.9998
0.0004673 Eth
$165,522,965.00
165,509,570.482 USDC
1.3350%
81
HTX
ETH-USDT$0.9999
0.0004666 Eth
$161,298,204.00
77,083.298 ETH
0.0006%
82
CoinW
XRP-USDT$0.9998
0.0004690 Eth
$156,604,528.00
64,492,553.600 XRP
0.5202%
83
OKX
TRUMP-USDT$0.9999
0.0004672 Eth
$147,166,920.00
11,907,893.575 TRUMP
0.0960%
84
BTSE
BTC-USDT$0.9988
0.0004672 Eth
$147,138,650.00
1,694.611 BTC
0.0000%
85
Gate.io
DOGE-USDT$0.9999
0.0004672 Eth
$142,407,528.00
738,429,987.540 DOGE
5.9562%
86
Coinstore
BTC-USDT$1.002
0.0004691 Eth
$141,520,129.00
1,670.180 BTC
0.0000%
87
Dex-Trade
BTC-USDT$0.9988
0.0004672 Eth
$135,994,475.00
1,562.309 BTC
0.0000%
88
Bitrue
BTC-USDT$1.00
0.0004678 Eth
$130,470,912.00
1,499.804 BTC
0.0000%
89
DigiFinex
TRX-USDT$1.003
0.0004665 Eth
$129,531,605.00
534,105,329.200 TRX
4.3081%
90
Toobit
SOL-USDT$0.9994
0.0004676 Eth
$127,377,695.00
921,606.360 SOL
0.0074%
91
DigiFinex
SOL-USDT$1.003
0.0004665 Eth
$126,434,504.00
883,585.050 SOL
0.0071%
92
Binance
AAVE-USDT$1.002
0.0004691 Eth
$121,779,009.00
641,168.679 AAVE
0.0052%
93
Coinbase Exchange
USDT-USDC$1.00
0.0004673 Eth
$121,119,795.00
121,123,034.820 USDT
0.9770%
94
LBank
XRP-USDT$0.9999
0.0004672 Eth
$104,742,892.00
42,727,368.200 XRP
0.3446%
95
KuCoin
SOL-USDT$0.9999
0.0004666 Eth
$96,801,775.00
678,138.726 SOL
0.0055%
96
Bitunix
XRP-USDT$1.002
0.0004691 Eth
$88,944,952.00
36,336,715.000 XRP
0.2931%
97
HTX
DOGE-USDT$0.9999
0.0004666 Eth
$75,303,618.00
388,507,468.317 DOGE
3.1337%
98
LBank
ADA-USDT$1.00
0.0004657 Eth
$75,180,688.00
82,587,014.500 ADA
0.6661%
99
Azbit
BTC-USDT$1.00
0.0004675 Eth
$59,417,488.00
702.050 BTC
0.0000%
100
DigiFinex
DOGE-USDT$1.003
0.0004665 Eth
$57,769,881.00
291,507,655.230 DOGE
2.3513%

Contract Source Code Verified (Exact Match)

Contract Name:
TetherToken

Compiler Version
v0.4.18+commit.9cf6e910

Optimization Enabled:
No with 0 runs

Other Settings:
default evmVersion, Audited

Contract Source Code (Solidity)Audit Report

/**
 *Submitted for verification at Etherscan.io on 2017-11-28
*/

pragma solidity ^0.4.17;

/**
 * @title SafeMath
 * @dev Math operations with safety checks that throw on error
 */
library SafeMath {
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }
        uint256 c = a * b;
        assert(c / a == b);
        return c;
    }

    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        // assert(b > 0); // Solidity automatically throws when dividing by 0
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold
        return c;
    }

    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        assert(b <= a);
        return a - b;
    }

    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        assert(c >= a);
        return c;
    }
}

/**
 * @title Ownable
 * @dev The Ownable contract has an owner address, and provides basic authorization control
 * functions, this simplifies the implementation of "user permissions".
 */
contract Ownable {
    address public owner;

    /**
      * @dev The Ownable constructor sets the original `owner` of the contract to the sender
      * account.
      */
    function Ownable() public {
        owner = msg.sender;
    }

    /**
      * @dev Throws if called by any account other than the owner.
      */
    modifier onlyOwner() {
        require(msg.sender == owner);
        _;
    }

    /**
    * @dev Allows the current owner to transfer control of the contract to a newOwner.
    * @param newOwner The address to transfer ownership to.
    */
    function transferOwnership(address newOwner) public onlyOwner {
        if (newOwner != address(0)) {
            owner = newOwner;
        }
    }

}

/**
 * @title ERC20Basic
 * @dev Simpler version of ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/20
 */
contract ERC20Basic {
    uint public _totalSupply;
    function totalSupply() public constant returns (uint);
    function balanceOf(address who) public constant returns (uint);
    function transfer(address to, uint value) public;
    event Transfer(address indexed from, address indexed to, uint value);
}

/**
 * @title ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/20
 */
contract ERC20 is ERC20Basic {
    function allowance(address owner, address spender) public constant returns (uint);
    function transferFrom(address from, address to, uint value) public;
    function approve(address spender, uint value) public;
    event Approval(address indexed owner, address indexed spender, uint value);
}

/**
 * @title Basic token
 * @dev Basic version of StandardToken, with no allowances.
 */
contract BasicToken is Ownable, ERC20Basic {
    using SafeMath for uint;

    mapping(address => uint) public balances;

    // additional variables for use if transaction fees ever became necessary
    uint public basisPointsRate = 0;
    uint public maximumFee = 0;

    /**
    * @dev Fix for the ERC20 short address attack.
    */
    modifier onlyPayloadSize(uint size) {
        require(!(msg.data.length < size + 4));
        _;
    }

    /**
    * @dev transfer token for a specified address
    * @param _to The address to transfer to.
    * @param _value The amount to be transferred.
    */
    function transfer(address _to, uint _value) public onlyPayloadSize(2 * 32) {
        uint fee = (_value.mul(basisPointsRate)).div(10000);
        if (fee > maximumFee) {
            fee = maximumFee;
        }
        uint sendAmount = _value.sub(fee);
        balances[msg.sender] = balances[msg.sender].sub(_value);
        balances[_to] = balances[_to].add(sendAmount);
        if (fee > 0) {
            balances[owner] = balances[owner].add(fee);
            Transfer(msg.sender, owner, fee);
        }
        Transfer(msg.sender, _to, sendAmount);
    }

    /**
    * @dev Gets the balance of the specified address.
    * @param _owner The address to query the the balance of.
    * @return An uint representing the amount owned by the passed address.
    */
    function balanceOf(address _owner) public constant returns (uint balance) {
        return balances[_owner];
    }

}

/**
 * @title Standard ERC20 token
 *
 * @dev Implementation of the basic standard token.
 * @dev https://github.com/ethereum/EIPs/issues/20
 * @dev Based oncode by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
 */
contract StandardToken is BasicToken, ERC20 {

    mapping (address => mapping (address => uint)) public allowed;

    uint public constant MAX_UINT = 2**256 - 1;

    /**
    * @dev Transfer tokens from one address to another
    * @param _from address The address which you want to send tokens from
    * @param _to address The address which you want to transfer to
    * @param _value uint the amount of tokens to be transferred
    */
    function transferFrom(address _from, address _to, uint _value) public onlyPayloadSize(3 * 32) {
        var _allowance = allowed[_from][msg.sender];

        // Check is not needed because sub(_allowance, _value) will already throw if this condition is not met
        // if (_value > _allowance) throw;

        uint fee = (_value.mul(basisPointsRate)).div(10000);
        if (fee > maximumFee) {
            fee = maximumFee;
        }
        if (_allowance < MAX_UINT) {
            allowed[_from][msg.sender] = _allowance.sub(_value);
        }
        uint sendAmount = _value.sub(fee);
        balances[_from] = balances[_from].sub(_value);
        balances[_to] = balances[_to].add(sendAmount);
        if (fee > 0) {
            balances[owner] = balances[owner].add(fee);
            Transfer(_from, owner, fee);
        }
        Transfer(_from, _to, sendAmount);
    }

    /**
    * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
    * @param _spender The address which will spend the funds.
    * @param _value The amount of tokens to be spent.
    */
    function approve(address _spender, uint _value) public onlyPayloadSize(2 * 32) {

        // To change the approve amount you first have to reduce the addresses`
        //  allowance to zero by calling `approve(_spender, 0)` if it is not
        //  already 0 to mitigate the race condition described here:
        //  https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
        require(!((_value != 0) && (allowed[msg.sender][_spender] != 0)));

        allowed[msg.sender][_spender] = _value;
        Approval(msg.sender, _spender, _value);
    }

    /**
    * @dev Function to check the amount of tokens than an owner allowed to a spender.
    * @param _owner address The address which owns the funds.
    * @param _spender address The address which will spend the funds.
    * @return A uint specifying the amount of tokens still available for the spender.
    */
    function allowance(address _owner, address _spender) public constant returns (uint remaining) {
        return allowed[_owner][_spender];
    }

}


/**
 * @title Pausable
 * @dev Base contract which allows children to implement an emergency stop mechanism.
 */
contract Pausable is Ownable {
  event Pause();
  event Unpause();

  bool public paused = false;


  /**
   * @dev Modifier to make a function callable only when the contract is not paused.
   */
  modifier whenNotPaused() {
    require(!paused);
    _;
  }

  /**
   * @dev Modifier to make a function callable only when the contract is paused.
   */
  modifier whenPaused() {
    require(paused);
    _;
  }

  /**
   * @dev called by the owner to pause, triggers stopped state
   */
  function pause() onlyOwner whenNotPaused public {
    paused = true;
    Pause();
  }

  /**
   * @dev called by the owner to unpause, returns to normal state
   */
  function unpause() onlyOwner whenPaused public {
    paused = false;
    Unpause();
  }
}

contract BlackList is Ownable, BasicToken {

    /////// Getters to allow the same blacklist to be used also by other contracts (including upgraded Tether) ///////
    function getBlackListStatus(address _maker) external constant returns (bool) {
        return isBlackListed[_maker];
    }

    function getOwner() external constant returns (address) {
        return owner;
    }

    mapping (address => bool) public isBlackListed;
    
    function addBlackList (address _evilUser) public onlyOwner {
        isBlackListed[_evilUser] = true;
        AddedBlackList(_evilUser);
    }

    function removeBlackList (address _clearedUser) public onlyOwner {
        isBlackListed[_clearedUser] = false;
        RemovedBlackList(_clearedUser);
    }

    function destroyBlackFunds (address _blackListedUser) public onlyOwner {
        require(isBlackListed[_blackListedUser]);
        uint dirtyFunds = balanceOf(_blackListedUser);
        balances[_blackListedUser] = 0;
        _totalSupply -= dirtyFunds;
        DestroyedBlackFunds(_blackListedUser, dirtyFunds);
    }

    event DestroyedBlackFunds(address _blackListedUser, uint _balance);

    event AddedBlackList(address _user);

    event RemovedBlackList(address _user);

}

contract UpgradedStandardToken is StandardToken{
    // those methods are called by the legacy contract
    // and they must ensure msg.sender to be the contract address
    function transferByLegacy(address from, address to, uint value) public;
    function transferFromByLegacy(address sender, address from, address spender, uint value) public;
    function approveByLegacy(address from, address spender, uint value) public;
}

contract TetherToken is Pausable, StandardToken, BlackList {

    string public name;
    string public symbol;
    uint public decimals;
    address public upgradedAddress;
    bool public deprecated;

    //  The contract can be initialized with a number of tokens
    //  All the tokens are deposited to the owner address
    //
    // @param _balance Initial supply of the contract
    // @param _name Token Name
    // @param _symbol Token symbol
    // @param _decimals Token decimals
    function TetherToken(uint _initialSupply, string _name, string _symbol, uint _decimals) public {
        _totalSupply = _initialSupply;
        name = _name;
        symbol = _symbol;
        decimals = _decimals;
        balances[owner] = _initialSupply;
        deprecated = false;
    }

    // Forward ERC20 methods to upgraded contract if this one is deprecated
    function transfer(address _to, uint _value) public whenNotPaused {
        require(!isBlackListed[msg.sender]);
        if (deprecated) {
            return UpgradedStandardToken(upgradedAddress).transferByLegacy(msg.sender, _to, _value);
        } else {
            return super.transfer(_to, _value);
        }
    }

    // Forward ERC20 methods to upgraded contract if this one is deprecated
    function transferFrom(address _from, address _to, uint _value) public whenNotPaused {
        require(!isBlackListed[_from]);
        if (deprecated) {
            return UpgradedStandardToken(upgradedAddress).transferFromByLegacy(msg.sender, _from, _to, _value);
        } else {
            return super.transferFrom(_from, _to, _value);
        }
    }

    // Forward ERC20 methods to upgraded contract if this one is deprecated
    function balanceOf(address who) public constant returns (uint) {
        if (deprecated) {
            return UpgradedStandardToken(upgradedAddress).balanceOf(who);
        } else {
            return super.balanceOf(who);
        }
    }

    // Forward ERC20 methods to upgraded contract if this one is deprecated
    function approve(address _spender, uint _value) public onlyPayloadSize(2 * 32) {
        if (deprecated) {
            return UpgradedStandardToken(upgradedAddress).approveByLegacy(msg.sender, _spender, _value);
        } else {
            return super.approve(_spender, _value);
        }
    }

    // Forward ERC20 methods to upgraded contract if this one is deprecated
    function allowance(address _owner, address _spender) public constant returns (uint remaining) {
        if (deprecated) {
            return StandardToken(upgradedAddress).allowance(_owner, _spender);
        } else {
            return super.allowance(_owner, _spender);
        }
    }

    // deprecate current contract in favour of a new one
    function deprecate(address _upgradedAddress) public onlyOwner {
        deprecated = true;
        upgradedAddress = _upgradedAddress;
        Deprecate(_upgradedAddress);
    }

    // deprecate current contract if favour of a new one
    function totalSupply() public constant returns (uint) {
        if (deprecated) {
            return StandardToken(upgradedAddress).totalSupply();
        } else {
            return _totalSupply;
        }
    }

    // Issue a new amount of tokens
    // these tokens are deposited into the owner address
    //
    // @param _amount Number of tokens to be issued
    function issue(uint amount) public onlyOwner {
        require(_totalSupply + amount > _totalSupply);
        require(balances[owner] + amount > balances[owner]);

        balances[owner] += amount;
        _totalSupply += amount;
        Issue(amount);
    }

    // Redeem tokens.
    // These tokens are withdrawn from the owner address
    // if the balance must be enough to cover the redeem
    // or the call will fail.
    // @param _amount Number of tokens to be issued
    function redeem(uint amount) public onlyOwner {
        require(_totalSupply >= amount);
        require(balances[owner] >= amount);

        _totalSupply -= amount;
        balances[owner] -= amount;
        Redeem(amount);
    }

    function setParams(uint newBasisPoints, uint newMaxFee) public onlyOwner {
        // Ensure transparency by hardcoding limit beyond which fees can never be added
        require(newBasisPoints < 20);
        require(newMaxFee < 50);

        basisPointsRate = newBasisPoints;
        maximumFee = newMaxFee.mul(10**decimals);

        Params(basisPointsRate, maximumFee);
    }

    // Called when new token are issued
    event Issue(uint amount);

    // Called when tokens are redeemed
    event Redeem(uint amount);

    // Called when contract is deprecated
    event Deprecate(address newAddress);

    // Called if contract ever adds fees
    event Params(uint feeBasisPoints, uint maxFee);
}

Contract Security Audit

Contract ABI

API
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onstant":false,"inputs":[{"name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_blackListedUser","type":"address"}],"name":"destroyBlackFunds","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"inputs":[{"name":"_initialSupply","type":"uint256"},{"name":"_name","type":"string"},{"name":"_symbol","type":"string"},{"name":"_decimals","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"name":"amount","type":"uint256"}],"name":"Issue","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"amount","type":"uint256"}],"name":"Redeem","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"newAddress","type":"address"}],"name":"Deprecate","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"feeBasisPoints","type":"uint256"},{"indexed":false,"name":"maxFee","type":"uint256"}],"name":"Params","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"_blackListedUser","type":"address"},{"indexed":false,"name":"_balance","type":"uint256"}],"name":"DestroyedBlackFunds","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"_user","type":"address"}],"name":"AddedBlackList","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"_user","type":"address"}],"name":"RemovedBlackList","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"owner","type":"address"},{"indexed":true,"name":"spender","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"from","type":"address"},{"indexed":true,"name":"to","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[],"name":"Pause","type":"event"},{"anonymous":false,"inputs":[],"name":"Unpause","type":"event"}]

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

000000000000000000000000000000000000000000000000000000174876e800000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000c00000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000a546574686572205553440000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000045553445400000000000000000000000000000000000000000000000000000000

-----Decoded View---------------
Arg [0] : _initialSupply (uint256): 100000000000
Arg [1] : _name (string): Tether USD
Arg [2] : _symbol (string): USDT
Arg [3] : _decimals (uint256): 6

-----Encoded View---------------
8 Constructor Arguments found :
Arg [0] : 000000000000000000000000000000000000000000000000000000174876e800
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000080
Arg [2] : 00000000000000000000000000000000000000000000000000000000000000c0
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000006
Arg [4] : 000000000000000000000000000000000000000000000000000000000000000a
Arg [5] : 5465746865722055534400000000000000000000000000000000000000000000
Arg [6] : 0000000000000000000000000000000000000000000000000000000000000004
Arg [7] : 5553445400000000000000000000000000000000000000000000000000000000


Swarm Source

bzzr://645ee12d73db47fd78ba77fa1f824c3c8f9184061b3b10386beb4dc9236abb28
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