ETH Price: $3,478.06 (-0.35%)

Token

Tether USD (USDT)
 

Overview

Max Total Supply

76,926,220,145.483487 USDT

Holders

6,548,239 ( -0.041%)

Market

Price

$1.00 @ 0.000287 ETH (-0.10%)

Onchain Market Cap

$76,865,140,726.69

Circulating Supply Market Cap

$139,313,393,453.00

Other Info

Token Contract (WITH 6 Decimals)

Balance
0 USDT

Value
$0.00
0x8d2a7f88a3d489723f5622785462e2574955bd57
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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):$49,347,477,342.00
Market Capitalization:$139,313,393,453.00
Circulating Supply:139,423,980,093.00 USDT
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
Binance
BTC-USDT$0.9992
0.0002874 Eth
$1,383,335,180.00
14,056.619 BTC
0.0000%
2
FameEX
BTC-USDT$0.9989
0.0002872 Eth
$1,136,798,759.00
11,554.635 BTC
0.0000%
3
BVOX
BTC-USDT$0.9988
0.0002876 Eth
$1,103,714,170.00
11,220.372 BTC
0.0000%
4
WhiteBIT
BTC-USDT$0.9992
0.0002875 Eth
$1,001,528,880.00
10,132.932 BTC
0.0000%
5
AscendEX (BitMax)
BTC-USDT$0.9992
0.0002873 Eth
$940,898,748.00
9,518.822 BTC
0.0000%
6
MEXC
BTC-USDT$0.9991
0.0002876 Eth
$891,481,075.00
9,033.921 BTC
0.0000%
7
Toobit
BTC-USDT$0.9991
0.0002877 Eth
$826,301,121.00
8,397.222 BTC
0.0000%
8
Ourbit
BTC-USDT$0.9992
0.0002873 Eth
$817,178,598.00
8,303.502 BTC
0.0000%
9
Binance
FDUSD-USDT$0.9992
0.0002874 Eth
$587,083,883.00
585,594,278.000 FDUSD
0.0035%
10
Tapbit
ETH-USDT$0.9992
0.0002873 Eth
$582,273,855.00
167,192.095 ETH
0.0000%
11
FameEX
ETH-USDT$0.9989
0.0002872 Eth
$563,820,991.00
161,909.270 ETH
0.0000%
12
Bitget
BTC-USDT$0.9992
0.0002874 Eth
$543,358,145.00
5,524.444 BTC
0.0000%
13
Bybit
ETH-USDT$0.9991
0.0002873 Eth
$516,535,444.00
148,295.761 ETH
0.0000%
14
AscendEX (BitMax)
ETH-USDT$0.9992
0.0002873 Eth
$511,478,661.00
147,060.078 ETH
0.0000%
15
Toobit
ETH-USDT$0.9991
0.0002877 Eth
$511,089,096.00
146,742.832 ETH
0.0000%
16
OKX
BTC-USDT$0.9992
0.0002874 Eth
$511,058,188.00
5,193.824 BTC
0.0000%
17
WEEX
BTC-USDT$0.9992
0.0002880 Eth
$509,298,413.00
5,170.342 BTC
0.0000%
18
MEXC
ETH-USDT$0.9992
0.0002873 Eth
$496,247,878.00
142,685.441 ETH
0.0000%
19
Bitget
ETH-USDT$0.9992
0.0002874 Eth
$462,640,973.00
132,845.347 ETH
0.0000%
20
BitMart
BTC-USDT$0.9991
0.0002873 Eth
$425,917,346.00
4,312.491 BTC
0.0000%
21
Binance
DOGE-USDT$0.9992
0.0002871 Eth
$389,542,235.00
1,170,452,426.000 DOGE
0.0069%
22
DigiFinex
BTC-USDT$0.9992
0.0002874 Eth
$365,730,093.00
3,699.627 BTC
0.0000%
23
BitMart
ETH-USDT$0.9991
0.0002873 Eth
$357,067,526.00
102,732.627 ETH
0.0000%
24
OKX
ETH-USDT$0.9991
0.0002873 Eth
$345,578,256.00
99,210.351 ETH
0.0000%
25
P2B
BTC-USDT$1.00
0.0002877 Eth
$331,034,572.00
3,348.565 BTC
0.0000%
26
Binance
MOVE-USDT$0.9992
0.0002874 Eth
$318,986,831.00
297,114,944.600 MOVE
0.0018%
27
Binance
USUAL-USDT$0.9992
0.0002874 Eth
$313,764,587.00
230,957,575.300 USUAL
0.0014%
28
Ourbit
ETH-USDT$0.9992
0.0002873 Eth
$312,315,944.00
89,687.547 ETH
0.0000%
29
CoinW
BTC-USDT$0.9994
0.0002874 Eth
$292,836,761.00
2,960.348 BTC
0.0000%
30
Bitunix
BTC-USDT$0.9992
0.0002876 Eth
$271,458,787.00
2,747.365 BTC
0.0000%
31
Binance
PEPE-USDT$0.9992
0.0002874 Eth
$270,658,757.00
14,430,092,888,913.000 PEPE
85.5867%
32
LBank
BTC-USDT$0.9991
0.0002875 Eth
$265,916,738.00
2,690.882 BTC
0.0000%
33
Binance
HBAR-USDT$0.9992
0.0002876 Eth
$213,751,449.00
674,724,739.000 HBAR
0.0040%
34
Binance
PENGU-USDT$0.9992
0.0002874 Eth
$203,786,605.00
5,555,901,570.000 PENGU
0.0330%
35
Gate.io
BTC-USDT$0.9992
0.0002873 Eth
$202,901,512.00
2,061.614 BTC
0.0000%
36
BTSE
BTC-USDT$0.9991
0.0002873 Eth
$199,050,046.00
2,014.175 BTC
0.0000%
37
OKX
DOGE-USDT$0.9991
0.0002873 Eth
$186,621,047.00
560,287,018.041 DOGE
0.0033%
38
CoinW
ETH-USDT$0.9991
0.0002873 Eth
$176,412,312.00
50,739.331 ETH
0.0000%
39
Tapbit
BTC-USDT$0.9991
0.0002876 Eth
$170,830,292.00
1,736.147 BTC
0.0000%
40
Binance
SUI-USDT$0.9991
0.0002872 Eth
$170,413,762.00
37,515,565.400 SUI
0.0002%
41
BigONE
BTC-USDT$0.9991
0.0002873 Eth
$159,289,622.00
1,611.447 BTC
0.0000%
42
OKX
MOVE-USDT$0.9991
0.0002873 Eth
$154,269,309.00
144,643,047.500 MOVE
0.0009%
43
Gate.io
ETH-USDT$0.9992
0.0002874 Eth
$150,469,160.00
43,188.943 ETH
0.0000%
44
LBank
ETH-USDT$0.9991
0.0002875 Eth
$149,234,316.00
42,911.615 ETH
0.0000%
45
Bybit
SOL-USDT$0.9991
0.0002873 Eth
$141,380,518.00
713,334.387 SOL
0.0000%
46
Coinstore
ETH-USDT$0.9991
0.0002876 Eth
$139,905,784.00
40,204.260 ETH
0.0000%
47
Binance
COW-USDT$0.9991
0.0002872 Eth
$134,006,549.00
120,942,491.700 COW
0.0007%
48
LBank
SOL-USDT$0.9992
0.0002874 Eth
$133,920,934.00
680,776.095 SOL
0.0000%
49
Bybit
XRP-USDT$0.9991
0.0002873 Eth
$133,917,638.00
58,368,449.920 XRP
0.0003%
50
DigiFinex
ETH-USDT$0.9992
0.0002874 Eth
$133,594,920.00
38,412.233 ETH
0.0000%
51
Bitget
MOVE-USDT$0.9991
0.0002873 Eth
$128,614,682.00
121,284,030.890 MOVE
0.0007%
52
Bybit
MNT-USDT$0.9991
0.0002873 Eth
$126,742,275.00
101,901,193.480 MNT
0.0006%
53
Binance
LINK-USDT$0.9991
0.0002878 Eth
$122,318,708.00
4,922,807.780 LINK
0.0000%
54
CoinW
XRP-USDT$0.9992
0.0002880 Eth
$116,308,841.00
50,716,294.200 XRP
0.0003%
55
Coinstore
BTC-USDT$0.9991
0.0002873 Eth
$116,072,036.00
1,180.147 BTC
0.0000%
56
WhiteBIT
DOGE-USDT$0.9992
0.0002875 Eth
$115,947,087.00
346,726,152.300 DOGE
0.0021%
57
MEXC
DOGE-USDT$0.9992
0.0002881 Eth
$111,292,466.00
334,930,611.140 DOGE
0.0020%
58
HTX
DOGE-USDT$0.9992
0.0002873 Eth
$108,648,355.00
326,613,426.430 DOGE
0.0019%
59
WhiteBIT
SUI-USDT$0.999
0.0002873 Eth
$104,762,327.00
23,141,526.547 SUI
0.0001%
60
Biconomy.com
ETH-USDT$0.9992
0.0002874 Eth
$101,451,682.00
29,137.071 ETH
0.0000%
61
LATOKEN
ETH-USDT$0.9991
0.0002876 Eth
$100,056,043.00
28,773.464 ETH
0.0000%
62
Fastex
BTC-USDT$0.999
0.0002874 Eth
$99,463,250.00
1,006.426 BTC
0.0000%
63
OKX
SOL-USDT$0.9991
0.0002873 Eth
$97,946,497.00
493,992.590 SOL
0.0000%
64
Binance
PNUT-USDT$0.9992
0.0002874 Eth
$95,990,898.00
134,118,318.000 PNUT
0.0008%
65
LBank
DOGE-USDT$0.9991
0.0002875 Eth
$91,757,545.00
274,413,511.000 DOGE
0.0016%
66
Binance
ADA-USDT$0.9991
0.0002878 Eth
$89,248,859.00
97,014,974.300 ADA
0.0006%
67
Binance
ENA-USDT$0.9992
0.0002874 Eth
$86,860,410.00
83,990,961.100 ENA
0.0005%
68
Bybit
MOCA-USDT$0.9991
0.0002873 Eth
$86,521,898.00
226,894,368.660 MOCA
0.0013%
69
Bybit
PENGU-USDT$0.9991
0.0002873 Eth
$80,594,725.00
2,204,860,120.000 PENGU
0.0131%
70
WhiteBIT
HBAR-USDT$0.9991
0.0002873 Eth
$79,860,538.00
256,404,372.660 HBAR
0.0015%
71
Binance
AAVE-USDT$0.9992
0.0002874 Eth
$79,065,668.00
211,173.553 AAVE
0.0000%
72
Bitget
DOGE-USDT$0.9992
0.0002874 Eth
$73,205,690.00
220,052,404.339 DOGE
0.0013%
73
BigONE
ETH-USDT$0.9992
0.0002876 Eth
$72,473,754.00
20,838.461 ETH
0.0000%
74
BingX
BTC-USDT$0.9991
0.0002873 Eth
$70,497,213.00
716.572 BTC
0.0000%
75
MEXC
SUI-USDT$0.9992
0.0002873 Eth
$69,103,782.00
15,241,005.680 SUI
0.0001%
76
MEXC
SOL-USDT$0.9992
0.0002873 Eth
$69,007,737.00
350,751.600 SOL
0.0000%
77
OKX
XRP-USDT$0.9991
0.0002873 Eth
$68,669,069.00
29,934,423.107 XRP
0.0002%
78
Binance
VANA-USDT$0.9992
0.0002874 Eth
$68,262,951.00
3,618,529.860 VANA
0.0000%
79
Binance
CRV-USDT$0.9991
0.0002873 Eth
$66,620,160.00
64,436,840.200 CRV
0.0004%
80
WEEX
XRP-USDT$0.9992
0.0002880 Eth
$63,680,309.00
27,781,315.676 XRP
0.0002%
81
Gate.io
DOGE-USDT$0.9992
0.0002874 Eth
$63,395,422.00
190,251,020.820 DOGE
0.0011%
82
DigiFinex
DOGE-USDT$0.9992
0.0002874 Eth
$61,833,700.00
184,882,588.210 DOGE
0.0011%
83
Binance
LPT-USDT$0.9996
0.0002872 Eth
$59,286,549.00
3,014,649.890 LPT
0.0000%
84
Bitget
SUI-USDT$0.9991
0.0002873 Eth
$58,923,656.00
12,973,330.320 SUI
0.0001%
85
Gate.io
HBAR-USDT$0.9992
0.0002874 Eth
$55,036,916.00
173,732,083.600 HBAR
0.0010%
86
DigiFinex
TRX-USDT$0.9992
0.0002874 Eth
$53,417,939.00
207,980,992.800 TRX
0.0012%
87
Dex-Trade
BTC-USDT$0.9992
0.0002873 Eth
$52,928,241.00
535.489 BTC
0.0000%
88
Bybit
DOGE-USDT$0.9991
0.0002873 Eth
$52,261,872.00
157,081,547.600 DOGE
0.0009%
89
BYDFi
BTC-USDT$0.9991
0.0002874 Eth
$49,436,620.00
500.073 BTC
0.0000%
90
LBank
XRP-USDT$0.9991
0.0002873 Eth
$48,667,715.00
21,138,817.780 XRP
0.0001%
91
Bybit
PEPE-USDT$0.9991
0.0002873 Eth
$45,249,519.00
2,413,797,121,745.000 PEPE
14.3165%
92
Hibt
ETH-USDT$0.9992
0.0002876 Eth
$44,921,218.00
12,895.660 ETH
0.0000%
93
BTSE
XRP-USDT$1.001
0.0002878 Eth
$43,462,415.00
18,842,642.279 XRP
0.0001%
94
WEEX
SOL-USDT$0.9992
0.0002880 Eth
$41,892,073.00
211,895.430 SOL
0.0000%
95
WhiteBIT
ADA-USDT$0.999
0.0002873 Eth
$41,465,398.00
45,384,831.950 ADA
0.0003%
96
Azbit
BTC-USDT$0.9991
0.0002873 Eth
$41,457,172.00
421.283 BTC
0.0000%
97
BingX
ETH-USDT$0.9991
0.0002873 Eth
$41,224,576.00
11,840.990 ETH
0.0000%
98
WhiteBIT
JASMY-USDT$0.9991
0.0002875 Eth
$35,098,954.00
910,646,143.988 JASMY
0.0054%
99
DigiFinex
SOL-USDT$0.9992
0.0002874 Eth
$32,380,673.00
164,594.330 SOL
0.0000%
100
WhiteBIT
AAVE-USDT$0.9992
0.0002875 Eth
$29,393,962.00
79,408.221 AAVE
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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