ETH Price: $2,672.18 (+0.13%)

Token

Tether USD (USDT)
 

Overview

Max Total Supply

54,940,840,345.993792 USDT

Holders

6,273,578 ( 0.066%)

Market

Price

$1.00 @ 0.000374 ETH (-0.08%)

Onchain Market Cap

$54,853,539,350.68

Circulating Supply Market Cap

$120,335,344,891.00

Other Info

Token Contract (WITH 6 Decimals)

Balance
313 USDT

Value
$312.50 ( ~0.116945824538505 Eth) [0.0000%]
0x58e90645fbbe0f25ae293aa81d3a2786ecb0de38
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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):$54,536,531,246.00
Market Capitalization:$120,335,344,891.00
Circulating Supply:120,504,138,281.00 USDT
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
Binance
BTC-USDT$0.9999
0.0003744 Eth
$2,361,960,446.00
32,621.513 BTC
0.0000%
2
Ourbit
BTC-USDT$0.9996
0.0003744 Eth
$1,467,883,836.00
20,271.744 BTC
0.0000%
3
Bybit
BTC-USDT$0.9996
0.0003744 Eth
$1,454,414,549.00
20,116.088 BTC
0.0000%
4
Toobit
BTC-USDT$0.9998
0.0003748 Eth
$1,296,355,597.00
17,911.255 BTC
0.0000%
5
BVOX
BTC-USDT$0.9998
0.0003748 Eth
$1,204,011,778.00
16,645.658 BTC
0.0000%
6
Pionex
BTC-USDT$0.9996
0.0003744 Eth
$1,096,303,117.00
15,153.391 BTC
0.0000%
7
OrangeX
BTC-USDT$0.9995
0.0003744 Eth
$1,004,211,155.00
13,879.750 BTC
0.0000%
8
DigiFinex
BTC-USDT$0.9996
0.0003745 Eth
$861,853,123.00
12,012.673 BTC
0.0000%
9
Deepcoin
BTC-USDT$0.9998
0.0003729 Eth
$859,221,652.00
12,443.490 BTC
0.0000%
10
WhiteBIT
BTC-USDT$0.9998
0.0003729 Eth
$816,106,139.00
11,348.697 BTC
0.0000%
11
OKX
BTC-USDT$0.9999
0.0003744 Eth
$807,362,916.00
11,145.288 BTC
0.0000%
12
P2B
BTC-USDT$0.9999
0.0003744 Eth
$795,266,292.00
11,080.546 BTC
0.0000%
13
BitMart
BTC-USDT$0.9998
0.0003748 Eth
$676,585,925.00
9,441.858 BTC
0.0000%
14
Bybit
ETH-USDT$0.9996
0.0003744 Eth
$674,996,139.00
253,383.724 ETH
0.0000%
15
BitMart
ETH-USDT$0.9998
0.0003748 Eth
$554,116,351.00
207,580.978 ETH
0.0000%
16
XT.COM
BTC-USDT$0.9995
0.0003731 Eth
$497,051,128.00
6,866.326 BTC
0.0000%
17
BVOX
ETH-USDT$0.9996
0.0003745 Eth
$481,647,237.00
181,104.415 ETH
0.0000%
18
AscendEX (BitMax)
BTC-USDT$0.9996
0.0003744 Eth
$463,473,576.00
6,460.015 BTC
0.0000%
19
DigiFinex
ETH-USDT$0.9996
0.0003745 Eth
$406,848,391.00
152,346.169 ETH
0.0000%
20
HTX
BTC-USDT$0.9999
0.0003745 Eth
$380,333,118.00
5,255.861 BTC
0.0000%
21
OKX
ETH-USDT$0.9999
0.0003745 Eth
$376,378,803.00
141,436.852 ETH
0.0000%
22
Gate.io
ETH-USDT$1.00
0.0003748 Eth
$365,261,567.00
136,825.502 ETH
0.0000%
23
MEXC
ETH-USDT$0.9995
0.0003744 Eth
$360,527,639.00
135,019.413 ETH
0.0000%
24
Fastex
BTC-USDT$0.9996
0.0003744 Eth
$316,677,315.00
4,412.916 BTC
0.0000%
25
Tapbit
BTC-USDT$0.9998
0.0003748 Eth
$275,956,978.00
3,812.446 BTC
0.0000%
26
Gate.io
BTC-USDT$1.00
0.0003748 Eth
$267,385,185.00
3,692.271 BTC
0.0000%
27
Binance
PEPE-USDT$0.9996
0.0003745 Eth
$264,656,519.00
27,423,419,444,138.000 PEPE
62.5485%
28
AscendEX (BitMax)
ETH-USDT$0.9996
0.0003744 Eth
$258,925,090.00
96,977.471 ETH
0.0000%
29
Bitget
BTC-USDT$0.9999
0.0003745 Eth
$250,493,996.00
3,461.860 BTC
0.0000%
30
Biconomy.com
BTC-USDT$0.9998
0.0003731 Eth
$232,359,456.00
3,210.144 BTC
0.0000%
31
BTSE
BTC-USDT$0.9998
0.0003731 Eth
$224,983,939.00
3,131.672 BTC
0.0000%
32
Ourbit
ETH-USDT$1.00
0.0003748 Eth
$222,742,394.00
83,578.671 ETH
0.0000%
33
KuCoin
BTC-USDT$0.9996
0.0003744 Eth
$203,454,981.00
2,834.971 BTC
0.0000%
34
Coinstore
ETH-USDT$0.9998
0.0003748 Eth
$191,314,887.00
71,909.348 ETH
0.0000%
35
OKX
DOGE-USDT$0.9999
0.0003745 Eth
$168,930,680.00
981,187,144.589 DOGE
0.0022%
36
Bybit
SOL-USDT$0.9996
0.0003744 Eth
$149,359,570.00
840,752.260 SOL
0.0000%
37
Binance
BNB-USDT$0.9994
0.0003727 Eth
$145,082,861.00
240,968.030 BNB
0.0000%
38
KuCoin
ETH-USDT$0.9996
0.0003744 Eth
$144,736,234.00
54,214.765 ETH
0.0000%
39
Bitget
ETH-USDT$0.9999
0.0003745 Eth
$138,853,443.00
52,210.356 ETH
0.0000%
40
OKX
SOL-USDT$0.9999
0.0003745 Eth
$129,335,040.00
728,200.868 SOL
0.0000%
41
Gate.io
DOGE-USDT$0.9996
0.0003744 Eth
$106,486,603.00
618,671,949.290 DOGE
0.0014%
42
Bitget
DOGE-USDT$0.9999
0.0003745 Eth
$104,360,539.00
605,815,507.336 DOGE
0.0014%
43
WhiteBIT
DOGE-USDT$1.00
0.0003748 Eth
$94,949,790.00
569,602,658.000 DOGE
0.0013%
44
Bybit
DOGE-USDT$0.9996
0.0003744 Eth
$80,527,083.00
467,606,638.300 DOGE
0.0011%
45
HTX
ETH-USDT$0.9999
0.0003745 Eth
$78,558,867.00
29,498.531 ETH
0.0000%
46
Bybit
MNT-USDT$0.9996
0.0003744 Eth
$73,505,734.00
122,002,197.710 MNT
0.0003%
47
BingX
BTC-USDT$0.9999
0.0003745 Eth
$71,969,980.00
994.564 BTC
0.0000%
48
Bitget
SOL-USDT$0.9999
0.0003745 Eth
$70,848,360.00
397,497.541 SOL
0.0000%
49
Binance
TIA-USDT$0.9999
0.0003731 Eth
$70,068,744.00
14,086,477.830 TIA
0.0000%
50
Coinbase Exchange
BTC-USDT$0.9999
0.0003744 Eth
$67,813,464.00
944.652 BTC
0.0000%
51
OKX
SUI-USDT$0.9999
0.0003745 Eth
$66,487,272.00
32,457,181.810 SUI
0.0001%
52
Bybit
SUI-USDT$0.9996
0.0003744 Eth
$63,344,966.00
30,880,389.700 SUI
0.0001%
53
HTX
DOGE-USDT$0.9999
0.0003745 Eth
$63,110,577.00
366,429,213.491 DOGE
0.0008%
54
CoinEx
BTC-USDT$0.9985
0.0003742 Eth
$61,675,695.00
852.751 BTC
0.0000%
55
Bybit
CARV-USDT$0.9999
0.0003745 Eth
$59,828,197.00
75,007,071.500 CARV
0.0002%
56
Deepcoin
UXLINK-USDT$0.9997
0.0003728 Eth
$58,715,300.00
132,360,019.906 UXLINK
0.0003%
57
DigiFinex
DOGE-USDT$0.9996
0.0003745 Eth
$53,046,904.00
317,796,930.380 DOGE
0.0007%
58
Azbit
BNB-USDT$0.9999
0.0003744 Eth
$52,698,451.00
87,588.199 BNB
0.0000%
59
HTX
PEPE-USDT$1.00
0.0003748 Eth
$52,360,460.00
5,461,685,839,058.250 PEPE
12.4572%
60
C-Patex
BTC-USDT$0.9998
0.0003731 Eth
$51,948,329.00
722.851 BTC
0.0000%
61
Coinbase Exchange
USDT-USDC$1.001
0.0003748 Eth
$50,879,239.00
50,847,781.100 USDT
0.0001%
62
Binance
TAO-USDT$0.9995
0.0003741 Eth
$49,265,078.00
95,298.359 TAO
0.0000%
63
Binance
RUNE-USDT$0.9996
0.0003745 Eth
$47,738,598.00
7,949,147.900 RUNE
0.0000%
64
Bybit
PEPE-USDT$0.9996
0.0003744 Eth
$46,180,370.00
4,794,980,608,115.000 PEPE
10.9366%
65
MEXC
DOGE-USDT$0.9995
0.0003744 Eth
$46,104,820.00
276,320,677.130 DOGE
0.0006%
66
Bybit
APEX-USDT$0.9996
0.0003744 Eth
$45,838,882.00
32,856,225.540 APEX
0.0001%
67
Bybit
XRP-USDT$0.9996
0.0003744 Eth
$45,765,358.00
87,349,000.010 XRP
0.0002%
68
BingX
ETH-USDT$0.9999
0.0003745 Eth
$45,532,854.00
17,101.123 ETH
0.0000%
69
DigiFinex
SOL-USDT$0.9996
0.0003745 Eth
$45,017,859.00
257,512.790 SOL
0.0000%
70
Kraken
BTC-USDT$0.9993
0.0003742 Eth
$43,846,848.00
611.087 BTC
0.0000%
71
Binance
NEAR-USDT$0.9996
0.0003745 Eth
$42,689,645.00
9,761,215.800 NEAR
0.0000%
72
Azbit
TRX-USDT$0.9999
0.0003744 Eth
$39,206,448.00
234,572,876.188 TRX
0.0005%
73
KuCoin
SOL-USDT$0.9996
0.0003744 Eth
$38,358,085.00
219,309.551 SOL
0.0000%
74
WhiteBIT
WIF-USDT$1.00
0.0003748 Eth
$37,786,254.00
14,729,407.160 WIF
0.0000%
75
Gate.io
SOL-USDT$0.9996
0.0003744 Eth
$36,568,051.00
205,921.171 SOL
0.0000%
76
WhiteBIT
TRX-USDT$0.9999
0.0003731 Eth
$34,534,685.00
204,552,770.600 TRX
0.0005%
77
HashKey Global
BTC-USDT$0.9992
0.0003732 Eth
$34,053,685.00
471.487 BTC
0.0000%
78
WEEX
DOGE-USDT$0.9999
0.0003745 Eth
$33,828,590.00
196,306,910.143 DOGE
0.0004%
79
Binance
TURBO-USDT$0.9996
0.0003745 Eth
$31,450,883.00
3,411,057,701.000 TURBO
0.0078%
80
Binance
SAGA-USDT$0.9996
0.0003745 Eth
$31,129,529.00
14,837,629.400 SAGA
0.0000%
81
OKX
SHIB-USDT$0.9999
0.0003745 Eth
$30,380,819.00
1,611,067,705,982.000 SHIB
3.6746%
82
WhiteBIT
NEIRO-USDT$1.00
0.0003748 Eth
$30,103,369.00
17,367,817,355.000 NEIRO
0.0396%
83
XT.COM
DOGE-USDT$0.9998
0.0003748 Eth
$29,840,216.00
173,247,916.000 DOGE
0.0004%
84
Gate.io
BOME-USDT$0.9996
0.0003745 Eth
$29,833,700.00
3,356,401,174.300 BOME
0.0077%
85
Gate.io
PEPE-USDT$0.9995
0.0003744 Eth
$27,253,639.00
2,808,695,160,175.200 PEPE
6.4062%
86
Bitget
TURBO-USDT$0.9999
0.0003745 Eth
$26,677,496.00
2,893,930,784.000 TURBO
0.0066%
87
Binance
UNI-USDT$0.9996
0.0003745 Eth
$25,469,148.00
3,177,260.550 UNI
0.0000%
88
KuCoin
DOGE-USDT$0.9996
0.0003744 Eth
$24,179,107.00
144,977,499.058 DOGE
0.0003%
89
Gate.io
FTR-USDT$0.9996
0.0003744 Eth
$23,833,523.00
236,472,478.770 FTR
0.0005%
90
DigiFinex
TRX-USDT$0.9996
0.0003745 Eth
$23,178,391.00
137,222,467.600 TRX
0.0003%
91
Azbit
BTC-USDT$0.9999
0.0003744 Eth
$22,033,235.00
304.675 BTC
0.0000%
92
Trubit
BTC-USDT$1.00
0.0003731 Eth
$21,052,546.00
290.632 BTC
0.0000%
93
Binance
NOT-USDT$0.9995
0.0003744 Eth
$20,253,408.00
2,891,634,293.000 NOT
0.0066%
94
Hotcoin
NEIRO-USDT$0.9996
0.0003744 Eth
$20,174,057.00
11,600,133,929.000 NEIRO
0.0265%
95
WhiteBIT
TIA-USDT$0.9998
0.0003729 Eth
$19,627,845.00
4,147,005.706 TIA
0.0000%
96
XT.COM
XT-USDT$0.9996
0.0003744 Eth
$18,853,438.00
3,736,489.680 XT
0.0000%
97
DigiFinex
SHIB-USDT$0.9996
0.0003745 Eth
$16,093,137.00
873,418,445,784.000 SHIB
1.9921%
98
HTX
ADA-USDT$1.001
0.0003748 Eth
$16,049,799.00
45,090,330.987 ADA
0.0001%
99
Bybit
SHIB-USDT$0.9996
0.0003744 Eth
$15,481,434.00
822,399,875,454.400 SHIB
1.8758%
100
WhiteBIT
ADA-USDT$0.9999
0.0003745 Eth
$14,011,317.00
39,424,152.920 ADA
0.0001%

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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