ETH Price: $3,528.43 (+4.17%)

Token

Tether USD (USDT)
 

Overview

Max Total Supply

76,926,220,145.483487 USDT

Holders

6,572,073 ( -0.067%)

Market

Price

$1.00 @ 0.000283 ETH (+0.01%)

Onchain Market Cap

$76,896,218,919.63

Circulating Supply Market Cap

$139,753,931,229.00

Other Info

Token Contract (WITH 6 Decimals)

Balance
0 USDT

Value
$0.00
0x5e22d0928b7eaec6d7041eedfb3c19981a082a29
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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):$161,802,878,087.00
Market Capitalization:$139,753,931,229.00
Circulating Supply:139,872,815,647.00 USDT
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
Binance
ETH-USDT$1.001
0.0002847 Eth
$3,999,876,441.00
1,205,863.814 ETH
0.0000%
2
Toobit
BTC-USDT$0.9997
0.0002837 Eth
$2,753,077,950.00
28,726.726 BTC
0.0000%
3
FameEX
ETH-USDT$1.00
0.0002837 Eth
$2,689,749,406.00
810,965.762 ETH
0.0000%
4
Tapbit
ETH-USDT$0.9996
0.0002836 Eth
$2,597,555,543.00
780,948.174 ETH
0.0000%
5
Toobit
ETH-USDT$0.9996
0.0002836 Eth
$2,541,007,512.00
765,467.510 ETH
0.0000%
6
WhiteBIT
BTC-USDT$0.9995
0.0002836 Eth
$2,224,952,756.00
22,554.515 BTC
0.0000%
7
BitMart
ETH-USDT$0.9994
0.0002835 Eth
$1,918,163,628.00
544,224.757 ETH
0.0000%
8
Pionex
ETH-USDT$0.9995
0.0002836 Eth
$1,915,479,442.00
573,086.827 ETH
0.0000%
9
Binance
SOL-USDT$1.00
0.0002837 Eth
$1,747,678,132.00
9,367,306.414 SOL
0.0001%
10
Bitget
ETH-USDT$0.9996
0.0002836 Eth
$1,743,152,269.00
527,087.896 ETH
0.0000%
11
BVOX
ETH-USDT$0.9995
0.0002839 Eth
$1,724,414,432.00
519,417.815 ETH
0.0000%
12
OKX
ETH-USDT$0.9995
0.0002836 Eth
$1,676,503,353.00
507,945.972 ETH
0.0000%
13
Bybit
ETH-USDT$0.9996
0.0002836 Eth
$1,522,470,919.00
460,067.339 ETH
0.0000%
14
DigiFinex
BTC-USDT$0.9996
0.0002836 Eth
$1,415,899,622.00
14,348.935 BTC
0.0000%
15
Gate.io
ETH-USDT$0.9996
0.0002836 Eth
$1,333,864,809.00
404,922.210 ETH
0.0000%
16
Ourbit
ETH-USDT$0.9995
0.0002835 Eth
$1,321,322,743.00
395,930.031 ETH
0.0000%
17
Gate.io
BTC-USDT$0.9996
0.0002836 Eth
$1,161,684,692.00
12,180.298 BTC
0.0000%
18
OKX
DOGE-USDT$0.9995
0.0002836 Eth
$1,091,049,540.00
3,636,192,690.734 DOGE
0.0205%
19
Hotcoin
BTC-USDT$0.9997
0.0002836 Eth
$1,086,914,062.00
11,013.467 BTC
0.0000%
20
AscendEX (BitMax)
BTC-USDT$0.9996
0.0002836 Eth
$960,134,268.00
9,730.595 BTC
0.0000%
21
WhiteBIT
ETH-USDT$0.9995
0.0002849 Eth
$868,077,174.00
247,590.410 ETH
0.0000%
22
P2B
BTC-USDT$0.9997
0.0002836 Eth
$841,397,394.00
8,526.695 BTC
0.0000%
23
Binance
SUI-USDT$0.9994
0.0002839 Eth
$812,604,837.00
196,470,291.000 SUI
0.0011%
24
HTX
BTC-USDT$0.9996
0.0002836 Eth
$767,076,316.00
7,985.634 BTC
0.0000%
25
DigiFinex
ETH-USDT$0.9996
0.0002836 Eth
$638,369,748.00
181,103.912 ETH
0.0000%
26
XT.COM
ETH-USDT$0.9996
0.0002836 Eth
$635,061,997.00
191,508.685 ETH
0.0000%
27
LATOKEN
ETH-USDT$0.9995
0.0002839 Eth
$566,699,748.00
161,008.001 ETH
0.0000%
28
Bybit
SOL-USDT$0.9994
0.0002835 Eth
$540,571,397.00
2,918,930.291 SOL
0.0000%
29
AscendEX (BitMax)
ETH-USDT$0.9996
0.0002836 Eth
$535,670,464.00
151,985.168 ETH
0.0000%
30
FameEX
SOL-USDT$0.9996
0.0002838 Eth
$534,622,786.00
2,865,929.814 SOL
0.0000%
31
Binance
ADA-USDT$0.9996
0.0002836 Eth
$501,469,801.00
585,278,795.500 ADA
0.0033%
32
P2B
ETH-USDT$0.9994
0.0002842 Eth
$497,676,754.00
141,564.208 ETH
0.0000%
33
WhiteBIT
SOL-USDT$0.9995
0.0002849 Eth
$477,219,052.00
2,412,235.114 SOL
0.0000%
34
Gate.io
DOGE-USDT$0.9996
0.0002836 Eth
$467,729,954.00
1,560,008,243.920 DOGE
0.0088%
35
DigiFinex
DOGE-USDT$0.9996
0.0002836 Eth
$406,488,000.00
1,175,301,038.150 DOGE
0.0066%
36
BigONE
ETH-USDT$0.9996
0.0002836 Eth
$405,787,528.00
115,075.226 ETH
0.0000%
37
Binance
ENA-USDT$0.9996
0.0002836 Eth
$404,275,499.00
392,066,629.440 ENA
0.0022%
38
Gate.io
XRP-USDT$0.9996
0.0002836 Eth
$403,828,586.00
186,145,714.856 XRP
0.0010%
39
KuCoin
BTC-USDT$0.9996
0.0002836 Eth
$392,137,113.00
3,974.151 BTC
0.0000%
40
Binance
MOVE-USDT$0.9996
0.0002836 Eth
$386,176,334.00
432,137,141.900 MOVE
0.0024%
41
KuCoin
ETH-USDT$0.9996
0.0002836 Eth
$372,512,553.00
105,649.127 ETH
0.0000%
42
BTSE
BTC-USDT$0.9997
0.0002836 Eth
$365,628,532.00
3,704.892 BTC
0.0000%
43
Binance
TRX-USDT$0.9996
0.0002836 Eth
$361,053,643.00
1,501,743,698.000 TRX
0.0084%
44
WhiteBIT
XRP-USDT$0.9995
0.0002836 Eth
$352,516,520.00
149,232,167.580 XRP
0.0008%
45
Binance
HBAR-USDT$0.9996
0.0002836 Eth
$352,203,147.00
1,353,430,219.000 HBAR
0.0076%
46
OKX
SOL-USDT$0.9995
0.0002836 Eth
$344,456,530.00
1,853,276.280 SOL
0.0000%
47
OKX
XRP-USDT$0.9995
0.0002836 Eth
$323,560,706.00
149,577,715.537 XRP
0.0008%
48
WEEX
ETH-USDT$0.9995
0.0002849 Eth
$309,513,435.00
93,817.464 ETH
0.0000%
49
Deepcoin
SOL-USDT$0.9996
0.0002838 Eth
$308,733,791.00
1,668,711.561 SOL
0.0000%
50
WhiteBIT
SUI-USDT$0.9996
0.0002839 Eth
$294,674,431.00
60,389,226.632 SUI
0.0003%
51
WhiteBIT
ZEN-USDT$0.9995
0.0002848 Eth
$283,072,771.00
10,104,858.939 ZEN
0.0001%
52
Biconomy.com
ETH-USDT$0.9994
0.0002835 Eth
$279,797,982.00
83,932.079 ETH
0.0000%
53
HTX
ETH-USDT$0.9996
0.0002836 Eth
$272,258,456.00
81,478.268 ETH
0.0000%
54
Bitget
SUI-USDT$0.9996
0.0002836 Eth
$238,811,948.00
57,535,262.800 SUI
0.0003%
55
KuCoin
XRP-USDT$0.9996
0.0002836 Eth
$236,238,576.00
100,234,252.789 XRP
0.0006%
56
Binance
UNI-USDT$0.9996
0.0002836 Eth
$235,552,441.00
18,743,007.520 UNI
0.0001%
57
Binance
ZEN-USDT$0.9996
0.0002836 Eth
$234,579,323.00
9,862,904.450 ZEN
0.0001%
58
Binance
PNUT-USDT$0.9996
0.0002836 Eth
$220,135,590.00
342,681,555.000 PNUT
0.0019%
59
Hibt
ETH-USDT$0.9995
0.0002838 Eth
$218,062,115.00
66,076.999 ETH
0.0000%
60
Toobit
XRP-USDT$0.9996
0.0002836 Eth
$216,969,741.00
99,909,249.000 XRP
0.0006%
61
OKX
SUI-USDT$0.9995
0.0002836 Eth
$214,644,464.00
51,655,645.655 SUI
0.0003%
62
Bybit
SUI-USDT$0.9994
0.0002835 Eth
$199,641,734.00
47,960,946.740 SUI
0.0003%
63
Bitget
SOL-USDT$0.9996
0.0002836 Eth
$199,541,741.00
1,070,837.871 SOL
0.0000%
64
Gate.io
SOL-USDT$0.9996
0.0002836 Eth
$198,595,254.00
1,072,904.176 SOL
0.0000%
65
HTX
DOGE-USDT$0.9996
0.0002836 Eth
$196,053,848.00
635,625,684.607 DOGE
0.0036%
66
Binance
BONK-USDT$0.9996
0.0002836 Eth
$186,741,641.00
6,245,996,972,565.000 BONK
35.1372%
67
Binance
NEAR-USDT$0.9996
0.0002836 Eth
$186,269,338.00
37,558,377.900 NEAR
0.0002%
68
Toobit
DOGE-USDT$0.9997
0.0002837 Eth
$178,548,683.00
592,627,969.000 DOGE
0.0033%
69
Binance
LTC-USDT$0.9996
0.0002836 Eth
$177,633,584.00
1,861,757.622 LTC
0.0000%
70
OKX
PEPE-USDT$0.9995
0.0002836 Eth
$177,145,439.00
10,717,323,582,496.000 PEPE
60.2910%
71
DigiFinex
TRX-USDT$0.9996
0.0002836 Eth
$168,208,552.00
661,763,050.700 TRX
0.0037%
72
BTSE
ETH-USDT$0.9997
0.0002836 Eth
$166,787,374.00
47,316.308 ETH
0.0000%
73
KuCoin
SOL-USDT$0.9996
0.0002836 Eth
$159,993,344.00
803,750.833 SOL
0.0000%
74
Binance
DOT-USDT$0.9996
0.0002836 Eth
$155,842,666.00
23,190,724.960 DOT
0.0001%
75
Deepcoin
DOGE-USDT$0.9995
0.0002836 Eth
$153,663,780.00
500,874,832.837 DOGE
0.0028%
76
Bitunix
SOL-USDT$0.9996
0.0002836 Eth
$148,023,800.00
744,153.821 SOL
0.0000%
77
Binance
ARB-USDT$0.9996
0.0002836 Eth
$146,583,010.00
197,452,861.900 ARB
0.0011%
78
WhiteBIT
HBAR-USDT$0.9996
0.0002836 Eth
$146,109,827.00
522,597,266.820 HBAR
0.0029%
79
DigiFinex
SUI-USDT$0.9996
0.0002836 Eth
$145,985,103.00
30,193,007.000 SUI
0.0002%
80
DigiFinex
SOL-USDT$0.9996
0.0002836 Eth
$143,730,206.00
722,391.130 SOL
0.0000%
81
Dex-Trade
BTC-USDT$0.9997
0.0002836 Eth
$135,909,601.00
1,377.451 BTC
0.0000%
82
Binance
FLOKI-USDT$0.9996
0.0002836 Eth
$129,964,847.00
796,026,268,921.000 FLOKI
4.4781%
83
MEXC
ADA-USDT$0.9996
0.0002836 Eth
$129,501,540.00
131,810,449.700 ADA
0.0007%
84
Binance
FIL-USDT$0.9996
0.0002836 Eth
$127,769,937.00
26,512,484.340 FIL
0.0001%
85
WhiteBIT
ADA-USDT$0.9995
0.0002836 Eth
$127,309,020.00
129,502,286.220 ADA
0.0007%
86
Slex
BTC-USDT$0.9996
0.0002836 Eth
$122,216,788.00
1,273.964 BTC
0.0000%
87
Binance
CRV-USDT$0.9996
0.0002836 Eth
$117,833,029.00
149,463,127.600 CRV
0.0008%
88
WhiteBIT
LINK-USDT$0.9995
0.0002836 Eth
$116,973,132.00
4,765,953.970 LINK
0.0000%
89
XT.COM
DOGE-USDT$0.9996
0.0002836 Eth
$114,407,189.00
380,248,564.000 DOGE
0.0021%
90
Binance
SAND-USDT$0.9996
0.0002836 Eth
$109,464,332.00
197,492,213.000 SAND
0.0011%
91
DigiFinex
XRP-USDT$0.9996
0.0002836 Eth
$104,366,312.00
44,264,007.000 XRP
0.0002%
92
DigiFinex
USDC-USDT$0.9996
0.0002836 Eth
$94,824,177.00
94,803,314.000 USDC
0.0005%
93
BingX
ETH-USDT$0.9994
0.0002835 Eth
$92,510,082.00
27,681.071 ETH
0.0000%
94
WhiteBIT
AAVE-USDT$0.9996
0.0002836 Eth
$90,548,627.00
267,387.624 AAVE
0.0000%
95
Gate.io
ADA-USDT$0.9996
0.0002836 Eth
$90,424,128.00
107,239,136.840 ADA
0.0006%
96
WhiteBIT
FIL-USDT$0.9995
0.0002848 Eth
$82,518,888.00
15,325,233.621 FIL
0.0001%
97
WhiteBIT
UNI-USDT$0.9995
0.0002836 Eth
$82,410,887.00
5,633,492.510 UNI
0.0000%
98
BYDFi
ETH-USDT$0.9994
0.0002842 Eth
$82,013,405.00
23,310.254 ETH
0.0000%
99
Bitunix
SUI-USDT$0.9994
0.0002837 Eth
$81,469,993.00
16,847,185.300 SUI
0.0001%
100
WEEX
SOL-USDT$1.001
0.0002848 Eth
$69,849,893.00
375,189.981 SOL
0.0000%

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

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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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