ETH Price: $3,920.55 (+5.13%)

Token

Tether USD (USDT)
 

Overview

Max Total Supply

71,928,719,896.684091 USDT

Holders

6,496,766 ( 0.005%)

Market

Price

$1.00 @ 0.000255 ETH (-0.10%)

Onchain Market Cap

$71,926,705,892.53

Circulating Supply Market Cap

$135,825,751,553.00

Other Info

Token Contract (WITH 6 Decimals)

Balance
0.263579 USDT

Value
$0.26 ( ~6.63172249119779E-05 Eth) [0.0000%]
0xd3e3059e9ef726d1004e7a967691cb47b0037851
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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):$215,499,743,869.00
Market Capitalization:$135,825,751,553.00
Circulating Supply:135,691,101,232.00 USDT
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
BVOX
BTC-USDT$1.001
0.0002553 Eth
$5,856,226,352.00
58,752.936 BTC
0.0000%
2
Pionex
BTC-USDT$1.001
0.0002557 Eth
$5,845,430,241.00
58,710.195 BTC
0.0000%
3
CoinW
BTC-USDT$1.001
0.0002557 Eth
$5,343,911,832.00
51,947.272 BTC
0.0000%
4
Ourbit
BTC-USDT$1.001
0.0002561 Eth
$5,100,422,779.00
51,094.100 BTC
0.0000%
5
Binance
ETH-USDT$1.001
0.0002555 Eth
$4,080,762,160.00
1,069,257.966 ETH
0.0000%
6
Toobit
BTC-USDT$1.001
0.0002556 Eth
$4,048,896,496.00
40,633.150 BTC
0.0000%
7
Bybit
BTC-USDT$1.002
0.0002555 Eth
$3,898,742,799.00
39,237.985 BTC
0.0000%
8
DigiFinex
BTC-USDT$1.002
0.0002555 Eth
$3,419,803,537.00
33,211.415 BTC
0.0000%
9
Binance
XRP-USDT$1.001
0.0002556 Eth
$3,378,830,113.00
1,410,672,872.000 XRP
0.0019%
10
BitMart
BTC-USDT$1.001
0.0002556 Eth
$3,081,760,073.00
29,943.438 BTC
0.0000%
11
Binance
DOGE-USDT$1.001
0.0002556 Eth
$2,675,115,755.00
6,217,834,552.000 DOGE
0.0085%
12
Toobit
ETH-USDT$1.001
0.0002556 Eth
$2,623,866,714.00
687,218.259 ETH
0.0000%
13
Bitunix
BTC-USDT$1.001
0.0002556 Eth
$2,374,938,047.00
23,071.922 BTC
0.0000%
14
Binance
USDC-USDT$1.001
0.0002556 Eth
$2,253,004,903.00
2,252,791,590.000 USDC
0.0031%
15
Bitget
BTC-USDT$1.002
0.0002555 Eth
$2,196,618,697.00
22,008.899 BTC
0.0000%
16
LBank
BTC-USDT$1.001
0.0002557 Eth
$2,040,359,645.00
19,820.327 BTC
0.0000%
17
BitMart
ETH-USDT$1.001
0.0002556 Eth
$1,900,338,272.00
484,180.876 ETH
0.0000%
18
MEXC
ETH-USDT$1.001
0.0002557 Eth
$1,846,914,448.00
470,952.400 ETH
0.0000%
19
XT.COM
BTC-USDT$1.001
0.0002557 Eth
$1,844,748,060.00
18,476.654 BTC
0.0000%
20
BVOX
ETH-USDT$1.001
0.0002556 Eth
$1,801,426,606.00
472,167.939 ETH
0.0000%
21
WEEX
ETH-USDT$1.001
0.0002555 Eth
$1,768,051,473.00
463,025.767 ETH
0.0000%
22
Bybit
ETH-USDT$1.002
0.0002555 Eth
$1,654,135,950.00
432,344.705 ETH
0.0000%
23
Binance
FDUSD-USDT$1.001
0.0002555 Eth
$1,615,629,248.00
1,616,591,924.000 FDUSD
0.0022%
24
P2B
BTC-USDT$1.001
0.0002557 Eth
$1,613,057,306.00
15,671.478 BTC
0.0000%
25
Bitget
ETH-USDT$1.002
0.0002555 Eth
$1,532,431,043.00
400,485.811 ETH
0.0000%
26
DigiFinex
ETH-USDT$1.002
0.0002555 Eth
$1,501,016,250.00
382,259.587 ETH
0.0000%
27
Hotcoin
ETH-USDT$1.001
0.0002557 Eth
$1,423,185,673.00
362,949.439 ETH
0.0000%
28
CoinW
ETH-USDT$1.001
0.0002557 Eth
$1,353,330,782.00
345,138.287 ETH
0.0000%
29
Binance
TRX-USDT$1.001
0.0002553 Eth
$1,342,688,883.00
3,936,536,312.300 TRX
0.0054%
30
Binance
BNB-USDT$1.002
0.0002555 Eth
$1,308,602,103.00
1,759,535.389 BNB
0.0000%
31
Binance
SOL-USDT$1.001
0.0002555 Eth
$1,294,763,789.00
5,573,198.272 SOL
0.0000%
32
OKX
ETH-USDT$1.002
0.0002555 Eth
$1,219,797,791.00
318,859.247 ETH
0.0000%
33
Bybit
XRP-USDT$1.002
0.0002555 Eth
$1,109,843,846.00
463,991,366.180 XRP
0.0006%
34
Ourbit
ETH-USDT$1.001
0.0002556 Eth
$1,101,747,660.00
288,774.827 ETH
0.0000%
35
Binance
PEPE-USDT$1.002
0.0002555 Eth
$1,066,147,832.00
49,891,400,111,244.000 PEPE
68.1814%
36
BigONE
BTC-USDT$1.001
0.0002557 Eth
$1,013,689,925.00
9,846.783 BTC
0.0000%
37
LATOKEN
BTC-USDT$1.001
0.0002556 Eth
$1,001,373,194.00
9,730.806 BTC
0.0000%
38
AscendEX (BitMax)
BTC-USDT$1.002
0.0002555 Eth
$989,435,474.00
9,610.335 BTC
0.0000%
39
Bitunix
ETH-USDT$1.001
0.0002556 Eth
$983,645,179.00
250,518.075 ETH
0.0000%
40
OKX
DOGE-USDT$1.002
0.0002555 Eth
$945,639,064.00
2,194,713,848.930 DOGE
0.0030%
41
Bitget
XRP-USDT$1.002
0.0002555 Eth
$898,974,790.00
375,650,699.711 XRP
0.0005%
42
HTX
BTC-USDT$1.001
0.0002556 Eth
$872,789,819.00
8,787.427 BTC
0.0000%
43
Gate.io
BTC-USDT$1.002
0.0002556 Eth
$732,981,961.00
7,348.123 BTC
0.0000%
44
WhiteBIT
ETH-USDT$1.002
0.0002555 Eth
$727,262,994.00
185,392.765 ETH
0.0000%
45
Binance
SHIB-USDT$1.001
0.0002555 Eth
$719,852,362.00
23,089,265,808,567.000 SHIB
31.5537%
46
Gate.io
ETH-USDT$1.002
0.0002556 Eth
$631,977,553.00
165,283.929 ETH
0.0000%
47
Gate.io
XRP-USDT$1.002
0.0002556 Eth
$629,037,285.00
261,229,384.366 XRP
0.0004%
48
LATOKEN
ETH-USDT$1.001
0.0002556 Eth
$607,452,782.00
154,746.796 ETH
0.0000%
49
Coinstore
BTC-USDT$1.001
0.0002555 Eth
$605,642,036.00
6,073.924 BTC
0.0000%
50
Binance
HBAR-USDT$1.001
0.0002554 Eth
$601,716,733.00
2,008,612,819.000 HBAR
0.0027%
51
Binance
SAND-USDT$1.001
0.0002557 Eth
$600,247,043.00
635,557,637.000 SAND
0.0009%
52
DigiFinex
TRX-USDT$1.002
0.0002555 Eth
$589,940,218.00
1,758,594,599.600 TRX
0.0024%
53
OKX
XRP-USDT$1.002
0.0002555 Eth
$563,505,680.00
235,831,350.706 XRP
0.0003%
54
WhiteBIT
XRP-USDT$1.001
0.0002556 Eth
$559,795,139.00
232,308,790.190 XRP
0.0003%
55
Bybit
USDC-USDT$1.002
0.0002555 Eth
$557,695,941.00
557,471,138.300 USDC
0.0008%
56
Binance
ADA-USDT$1.001
0.0002555 Eth
$548,181,518.00
460,920,554.900 ADA
0.0006%
57
AscendEX (BitMax)
ETH-USDT$1.002
0.0002555 Eth
$529,042,957.00
134,720.261 ETH
0.0000%
58
Biconomy.com
BTC-USDT$1.001
0.0002556 Eth
$527,460,274.00
5,300.403 BTC
0.0000%
59
Bitget
DOGE-USDT$1.002
0.0002555 Eth
$521,570,255.00
1,211,705,584.367 DOGE
0.0017%
60
LBank
ETH-USDT$1.001
0.0002557 Eth
$510,960,120.00
130,308.148 ETH
0.0000%
61
CoinTR
BTC-USDT$1.001
0.0002557 Eth
$502,090,096.00
5,085.613 BTC
0.0000%
62
KuCoin
BTC-USDT$1.002
0.0002555 Eth
$490,793,694.00
4,766.653 BTC
0.0000%
63
Binance
SUI-USDT$1.001
0.0002555 Eth
$477,599,952.00
127,950,165.500 SUI
0.0002%
64
Binance
DOT-USDT$1.001
0.0002556 Eth
$473,871,554.00
43,898,202.450 DOT
0.0001%
65
BTSE
BTC-USDT$1.001
0.0002557 Eth
$465,337,982.00
4,520.493 BTC
0.0000%
66
Bybit
SOL-USDT$1.002
0.0002555 Eth
$458,041,357.00
1,971,371.539 SOL
0.0000%
67
Bitunix
XRP-USDT$1.001
0.0002556 Eth
$427,660,767.00
177,557,854.000 XRP
0.0002%
68
Gate.io
DOGE-USDT$1.002
0.0002556 Eth
$411,347,673.00
956,520,886.210 DOGE
0.0013%
69
Binance
RSR-USDT$1.001
0.0002555 Eth
$402,880,302.00
19,002,264,973.800 RSR
0.0260%
70
Bitunix
DOGE-USDT$1.001
0.0002556 Eth
$388,071,529.00
881,774,445.000 DOGE
0.0012%
71
Bybit
DOGE-USDT$1.002
0.0002555 Eth
$361,127,980.00
839,055,455.600 DOGE
0.0011%
72
Binance
RENDER-USDT$1.002
0.0002555 Eth
$348,107,119.00
34,433,449.040 RENDER
0.0000%
73
Binance
AVAX-USDT$1.001
0.0002554 Eth
$341,372,322.00
6,424,679.810 AVAX
0.0000%
74
Biconomy.com
ETH-USDT$1.001
0.0002557 Eth
$340,791,649.00
89,281.435 ETH
0.0000%
75
BYDFi
BTC-USDT$1.001
0.0002555 Eth
$340,670,476.00
3,302.217 BTC
0.0000%
76
MEXC
DOGE-USDT$1.001
0.0002557 Eth
$339,633,140.00
774,978,815.280 DOGE
0.0011%
77
Binance
GALA-USDT$1.002
0.0002555 Eth
$327,117,208.00
5,434,479,294.000 GALA
0.0074%
78
Toobit
XRP-USDT$1.001
0.0002557 Eth
$321,527,501.00
134,235,649.000 XRP
0.0002%
79
Binance
PNUT-USDT$1.001
0.0002557 Eth
$319,585,954.00
251,206,899.500 PNUT
0.0003%
80
WhiteBIT
DOGE-USDT$1.001
0.0002557 Eth
$317,907,147.00
724,703,571.500 DOGE
0.0010%
81
DigiFinex
DOGE-USDT$1.002
0.0002555 Eth
$313,454,284.00
712,087,366.440 DOGE
0.0010%
82
HTX
ETH-USDT$1.001
0.0002556 Eth
$307,991,770.00
80,678.124 ETH
0.0000%
83
WhiteBIT
SOL-USDT$1.001
0.0002556 Eth
$290,588,431.00
1,223,495.376 SOL
0.0000%
84
OKX
SOL-USDT$1.002
0.0002555 Eth
$287,311,311.00
1,235,048.002 SOL
0.0000%
85
KuCoin
XRP-USDT$1.002
0.0002555 Eth
$282,545,046.00
117,227,287.706 XRP
0.0002%
86
Binance
FIL-USDT$1.002
0.0002555 Eth
$271,615,911.00
33,684,876.970 FIL
0.0000%
87
KuCoin
ETH-USDT$1.002
0.0002555 Eth
$264,745,908.00
67,423.300 ETH
0.0000%
88
Binance
LTC-USDT$1.001
0.0002557 Eth
$263,198,431.00
2,038,341.389 LTC
0.0000%
89
BTSE
ETH-USDT$1.001
0.0002557 Eth
$260,644,501.00
66,403.964 ETH
0.0000%
90
Deepcoin
SOL-USDT$1.001
0.0002556 Eth
$247,855,763.00
1,086,234.353 SOL
0.0000%
91
WhiteBIT
TRX-USDT$1.001
0.0002556 Eth
$240,263,242.00
717,495,742.050 TRX
0.0010%
92
Binance
NEIRO-USDT$1.002
0.0002555 Eth
$236,540,152.00
135,445,127,990.000 NEIRO
0.1851%
93
WEEX
DOGE-USDT$1.001
0.0002556 Eth
$231,267,484.00
526,341,580.527 DOGE
0.0007%
94
Binance
ENA-USDT$1.001
0.0002556 Eth
$226,286,880.00
245,943,694.950 ENA
0.0003%
95
WEEX
SOL-USDT$1.001
0.0002555 Eth
$224,237,207.00
967,170.593 SOL
0.0000%
96
Binance
NEAR-USDT$1.002
0.0002555 Eth
$208,947,406.00
27,993,170.100 NEAR
0.0000%
97
Gate.io
TRX-USDT$1.002
0.0002556 Eth
$204,678,061.00
587,377,536.720 TRX
0.0008%
98
Gate.io
ENA-USDT$1.001
0.0002556 Eth
$183,082,802.00
198,899,817.580 ENA
0.0003%
99
Slex
BTC-USDT$1.001
0.0002556 Eth
$179,842,466.00
1,803.504 BTC
0.0000%
100
Poloniex
BTC-USDT$1.002
0.0002556 Eth
$172,196,054.00
1,750.261 BTC
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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