ETH Price: $2,642.13 (+0.87%)

Token

Tether USD (USDT)
 

Overview

Max Total Supply

54,940,840,345.993792 USDT

Holders

6,268,854 ( -0.007%)

Market

Price

$1.00 @ 0.000379 ETH (+0.06%)

Onchain Market Cap

$54,925,676,674.06

Circulating Supply Market Cap

$120,486,084,014.00

Other Info

Token Contract (WITH 6 Decimals)

Balance
0.000023 USDT

Value
$0.00 ( ~0 Eth) [0.0000%]
0xd5db95f0e0e2adc0b7e97ada97af9f5a40c21538
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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):$72,686,409,865.00
Market Capitalization:$120,486,084,014.00
Circulating Supply:120,504,138,281.00 USDT
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
Binance
BTC-USDT$0.9996
0.0003787 Eth
$3,188,830,094.00
44,232.036 BTC
0.0000%
2
CoinW
BTC-USDT$0.9997
0.0003787 Eth
$2,449,301,111.00
33,923.324 BTC
0.0000%
3
Ourbit
BTC-USDT$0.9996
0.0003783 Eth
$2,147,908,761.00
29,798.302 BTC
0.0000%
4
Hotcoin
BTC-USDT$0.9997
0.0003787 Eth
$1,998,134,684.00
27,679.953 BTC
0.0000%
5
WEEX
BTC-USDT$0.9998
0.0003787 Eth
$1,982,894,780.00
27,468.210 BTC
0.0000%
6
Toobit
BTC-USDT$0.9999
0.0003786 Eth
$1,682,185,561.00
23,342.542 BTC
0.0000%
7
BVOX
BTC-USDT$0.9994
0.0003785 Eth
$1,383,095,384.00
19,254.984 BTC
0.0000%
8
Pionex
BTC-USDT$0.9996
0.0003785 Eth
$1,377,052,841.00
19,118.038 BTC
0.0000%
9
Bybit
BTC-USDT$0.9996
0.0003787 Eth
$1,331,190,079.00
18,470.501 BTC
0.0000%
10
OrangeX
BTC-USDT$0.9996
0.0003785 Eth
$1,288,777,446.00
17,888.232 BTC
0.0000%
11
DigiFinex
BTC-USDT$0.9997
0.0003787 Eth
$1,129,398,865.00
15,640.516 BTC
0.0000%
12
P2B
BTC-USDT$0.9997
0.0003787 Eth
$1,051,288,809.00
14,564.927 BTC
0.0000%
13
Binance
ETH-USDT$0.9999
0.0003783 Eth
$1,039,042,493.00
394,343.071 ETH
0.0000%
14
OKX
BTC-USDT$0.9996
0.0003787 Eth
$1,006,376,279.00
13,941.582 BTC
0.0000%
15
Deepcoin
BTC-USDT$0.9997
0.0003787 Eth
$978,756,231.00
14,346.058 BTC
0.0000%
16
WhiteBIT
BTC-USDT$0.9994
0.0003782 Eth
$867,786,049.00
12,021.542 BTC
0.0000%
17
BitMart
BTC-USDT$0.9998
0.0003787 Eth
$778,631,330.00
10,781.292 BTC
0.0000%
18
Toobit
ETH-USDT$0.9996
0.0003785 Eth
$697,139,512.00
264,657.716 ETH
0.0000%
19
Bitunix
BTC-USDT$0.9998
0.0003787 Eth
$686,845,343.00
9,513.866 BTC
0.0000%
20
XT.COM
BTC-USDT$0.9999
0.0003787 Eth
$658,619,337.00
9,133.816 BTC
0.0000%
21
Binance
SOL-USDT$0.9997
0.0003784 Eth
$614,170,008.00
3,409,123.452 SOL
0.0001%
22
WEEX
ETH-USDT$0.9996
0.0003782 Eth
$605,374,520.00
229,779.693 ETH
0.0000%
23
Binance
DOGE-USDT$0.9997
0.0003787 Eth
$582,327,232.00
3,394,428,902.000 DOGE
0.0778%
24
Hotcoin
ETH-USDT$0.9997
0.0003787 Eth
$579,723,001.00
219,674.376 ETH
0.0000%
25
LBank
BTC-USDT$0.9997
0.0003787 Eth
$491,739,567.00
6,810.438 BTC
0.0000%
26
Bybit
ETH-USDT$0.9996
0.0003787 Eth
$482,887,024.00
183,438.020 ETH
0.0000%
27
BVOX
ETH-USDT$0.9998
0.0003787 Eth
$474,665,409.00
180,422.415 ETH
0.0000%
28
AscendEX (BitMax)
BTC-USDT$0.9997
0.0003787 Eth
$470,808,017.00
6,520.763 BTC
0.0000%
29
Binance
FDUSD-USDT$0.9997
0.0003784 Eth
$459,224,465.00
459,566,082.000 FDUSD
0.0105%
30
Deepcoin
ETH-USDT$0.9997
0.0003787 Eth
$437,363,601.00
166,942.996 ETH
0.0000%
31
HTX
BTC-USDT$0.9997
0.0003787 Eth
$428,405,723.00
5,940.172 BTC
0.0000%
32
OrangeX
ETH-USDT$0.9996
0.0003785 Eth
$412,020,822.00
156,485.539 ETH
0.0000%
33
Pionex
ETH-USDT$0.9999
0.0003783 Eth
$399,635,977.00
151,737.017 ETH
0.0000%
34
Tapbit
BTC-USDT$0.9994
0.0003785 Eth
$378,368,714.00
5,250.919 BTC
0.0000%
35
BigONE
BTC-USDT$0.9997
0.0003787 Eth
$376,352,266.00
5,211.689 BTC
0.0000%
36
Gate.io
BTC-USDT$0.9997
0.0003787 Eth
$372,593,554.00
5,162.932 BTC
0.0000%
37
P2B
ETH-USDT$0.9997
0.0003787 Eth
$367,766,332.00
139,309.020 ETH
0.0000%
38
BitMart
ETH-USDT$0.9998
0.0003787 Eth
$364,784,184.00
138,138.499 ETH
0.0000%
39
CoinW
ETH-USDT$0.9997
0.0003785 Eth
$357,401,145.00
135,321.038 ETH
0.0000%
40
MEXC
ETH-USDT$0.9997
0.0003787 Eth
$333,431,897.00
126,323.633 ETH
0.0000%
41
Gate.io
ETH-USDT$0.9997
0.0003787 Eth
$325,472,637.00
123,476.452 ETH
0.0000%
42
DigiFinex
ETH-USDT$0.9997
0.0003787 Eth
$305,131,806.00
115,584.095 ETH
0.0000%
43
OKX
ETH-USDT$0.9996
0.0003787 Eth
$301,772,333.00
114,590.748 ETH
0.0000%
44
WhiteBIT
ETH-USDT$0.9999
0.0003787 Eth
$299,622,294.00
113,474.232 ETH
0.0000%
45
LATOKEN
BTC-USDT$0.9998
0.0003787 Eth
$297,761,848.00
4,124.495 BTC
0.0000%
46
KuCoin
BTC-USDT$0.9997
0.0003787 Eth
$291,300,716.00
4,034.306 BTC
0.0000%
47
XT.COM
ETH-USDT$0.9996
0.0003783 Eth
$289,197,558.00
109,795.597 ETH
0.0000%
48
Biconomy.com
BTC-USDT$0.9998
0.0003787 Eth
$280,679,492.00
3,896.251 BTC
0.0000%
49
Binance
SUI-USDT$0.9994
0.0003785 Eth
$280,394,184.00
140,106,865.300 SUI
0.0032%
50
Bitget
BTC-USDT$0.9996
0.0003787 Eth
$275,575,344.00
3,829.880 BTC
0.0000%
51
Binance
NEIRO-USDT$0.9997
0.0003784 Eth
$266,923,839.00
158,762,998,681.000 NEIRO
3.6402%
52
Fastex
BTC-USDT$0.9997
0.0003785 Eth
$266,138,888.00
3,685.184 BTC
0.0000%
53
AscendEX (BitMax)
ETH-USDT$0.9997
0.0003787 Eth
$259,044,435.00
98,112.823 ETH
0.0000%
54
BTSE
BTC-USDT$0.9997
0.0003785 Eth
$207,472,392.00
2,872.391 BTC
0.0000%
55
Coinstore
BTC-USDT$0.9999
0.0003787 Eth
$206,269,531.00
2,870.133 BTC
0.0000%
56
OKX
DOGE-USDT$0.9996
0.0003787 Eth
$204,420,219.00
1,191,191,458.615 DOGE
0.0273%
57
Bitunix
ETH-USDT$0.9997
0.0003787 Eth
$200,534,160.00
75,958.899 ETH
0.0000%
58
Ourbit
ETH-USDT$0.9998
0.0003787 Eth
$193,262,729.00
73,390.253 ETH
0.0000%
59
LBank
ETH-USDT$0.9997
0.0003785 Eth
$184,554,778.00
69,822.527 ETH
0.0000%
60
Coinstore
ETH-USDT$0.9998
0.0003787 Eth
$174,707,786.00
66,375.893 ETH
0.0000%
61
Dex-Trade
BTC-USDT$0.9996
0.0003795 Eth
$167,970,133.00
2,318.471 BTC
0.0000%
62
Binance
BNB-USDT$0.9997
0.0003785 Eth
$166,141,614.00
274,074.137 BNB
0.0000%
63
Bybit
SOL-USDT$0.9997
0.0003787 Eth
$156,794,510.00
870,321.249 SOL
0.0000%
64
Hotcoin
DOGE-USDT$0.9997
0.0003787 Eth
$146,043,867.00
835,763,642.415 DOGE
0.0192%
65
Bitget
ETH-USDT$0.9996
0.0003787 Eth
$139,491,569.00
53,016.430 ETH
0.0000%
66
ProBit Global
BTC-USDT$0.9997
0.0003787 Eth
$137,553,392.00
1,905.038 BTC
0.0000%
67
OKX
SOL-USDT$0.9996
0.0003787 Eth
$135,429,263.00
752,564.902 SOL
0.0000%
68
KuCoin
ETH-USDT$0.9997
0.0003787 Eth
$134,345,344.00
50,885.478 ETH
0.0000%
69
LATOKEN
ETH-USDT$0.9998
0.0003787 Eth
$133,490,202.00
50,559.452 ETH
0.0000%
70
WhiteBIT
DOGE-USDT$0.9996
0.0003785 Eth
$127,042,443.00
726,910,208.000 DOGE
0.0167%
71
Bitget
DOGE-USDT$0.9996
0.0003787 Eth
$124,118,620.00
722,930,910.722 DOGE
0.0166%
72
Gate.io
DOGE-USDT$0.9997
0.0003787 Eth
$119,941,442.00
700,476,839.760 DOGE
0.0161%
73
Deepcoin
SOL-USDT$0.9999
0.0003785 Eth
$114,544,005.00
697,612.745 SOL
0.0000%
74
Binance
XRP-USDT$0.9997
0.0003785 Eth
$112,101,651.00
213,165,111.000 XRP
0.0049%
75
Bybit
DOGE-USDT$0.9996
0.0003787 Eth
$103,377,248.00
603,008,254.800 DOGE
0.0138%
76
BigONE
ETH-USDT$0.9997
0.0003787 Eth
$103,141,146.00
39,070.080 ETH
0.0000%
77
LBank
SOL-USDT$0.9997
0.0003784 Eth
$99,045,521.00
550,184.045 SOL
0.0000%
78
CoinEx
BTC-USDT$0.9994
0.0003782 Eth
$94,706,335.00
1,317.108 BTC
0.0000%
79
WhiteBIT
SOL-USDT$0.9999
0.0003787 Eth
$87,879,485.00
487,921.638 SOL
0.0000%
80
Slex
BTC-USDT$0.9994
0.0003785 Eth
$85,890,045.00
1,191.567 BTC
0.0000%
81
Gate.io
SUI-USDT$0.9997
0.0003787 Eth
$85,376,790.00
42,481,608.630 SUI
0.0010%
82
OKX
SUI-USDT$0.9996
0.0003787 Eth
$82,928,026.00
41,277,177.250 SUI
0.0009%
83
BingX
BTC-USDT$0.9997
0.0003787 Eth
$76,901,563.00
1,068.514 BTC
0.0000%
84
BTSE
ETH-USDT$0.9999
0.0003787 Eth
$76,073,032.00
28,819.537 ETH
0.0000%
85
Binance
RUNE-USDT$0.9997
0.0003787 Eth
$73,204,427.00
11,999,499.300 RUNE
0.0003%
86
Bitget
SOL-USDT$0.9996
0.0003787 Eth
$72,739,105.00
404,127.161 SOL
0.0000%
87
Coinbase Exchange
BTC-USDT$0.9996
0.0003787 Eth
$71,847,149.00
995.333 BTC
0.0000%
88
BYDFi
BTC-USDT$0.9999
0.0003787 Eth
$71,515,462.00
990.475 BTC
0.0000%
89
HTX
ETH-USDT$0.9997
0.0003787 Eth
$71,233,967.00
27,020.562 ETH
0.0000%
90
Bybit
MNT-USDT$0.9997
0.0003787 Eth
$70,105,696.00
116,614,779.450 MNT
0.0027%
91
DigiFinex
DOGE-USDT$0.9997
0.0003787 Eth
$67,339,795.00
384,784,721.640 DOGE
0.0088%
92
Bitunix
DOGE-USDT$0.9997
0.0003787 Eth
$64,832,215.00
371,025,170.000 DOGE
0.0085%
93
HTX
DOGE-USDT$0.9997
0.0003787 Eth
$63,903,985.00
373,799,276.066 DOGE
0.0086%
94
Binance
BOME-USDT$0.9997
0.0003784 Eth
$62,174,847.00
6,885,993,799.000 BOME
0.1579%
95
Binance
PEOPLE-USDT$0.9997
0.0003787 Eth
$53,435,472.00
689,168,057.100 PEOPLE
0.0158%
96
KuCoin
SOL-USDT$0.9997
0.0003787 Eth
$50,594,146.00
280,805.418 SOL
0.0000%
97
Binance
TURBO-USDT$0.9996
0.0003783 Eth
$48,141,522.00
5,054,063,841.000 TURBO
0.1159%
98
Gate.io
TURBO-USDT$0.9997
0.0003787 Eth
$43,703,505.00
4,590,045,862.448 TURBO
0.1052%
99
Bitget
PEPE-USDT$0.9996
0.0003787 Eth
$40,099,414.00
4,175,068,089,587.000 PEPE
95.7279%
100
BingX
ETH-USDT$0.9997
0.0003787 Eth
$35,946,294.00
13,661.025 ETH
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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