ETH Price: $2,502.84 (-5.00%)

Token

Tether USD (USDT)
 

Overview

Max Total Supply

54,940,840,345.993792 USDT

Holders

6,277,215 ( -0.021%)

Market

Price

$1.00 @ 0.000399 ETH (-0.12%)

Onchain Market Cap

$54,876,724,385.31

Circulating Supply Market Cap

$120,453,429,643.00

Other Info

Token Contract (WITH 6 Decimals)

Balance
0 USDT

Value
$0.00
0x9897ff61da6e3579a40d92f7d17b5a667dcf25ed
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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):$34,565,009,410.00
Market Capitalization:$120,453,429,643.00
Circulating Supply:120,573,513,104.00 USDT
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
Binance
BTC-USDT$0.9994
0.0003994 Eth
$2,447,980,378.00
34,761.548 BTC
0.0000%
2
WEEX
BTC-USDT$0.999
0.0003995 Eth
$1,937,111,676.00
27,511.561 BTC
0.0000%
3
Hotcoin
BTC-USDT$0.9991
0.0003994 Eth
$1,931,853,130.00
27,859.191 BTC
0.0000%
4
CoinW
BTC-USDT$0.999
0.0003994 Eth
$1,785,356,234.00
25,749.201 BTC
0.0000%
5
BVOX
BTC-USDT$0.999
0.0003990 Eth
$1,404,734,083.00
19,975.838 BTC
0.0000%
6
Binance
USDC-USDT$0.9991
0.0003995 Eth
$1,378,668,421.00
1,378,980,955.000 USDC
0.0155%
7
Bybit
BTC-USDT$0.999
0.0003994 Eth
$1,236,492,528.00
17,556.723 BTC
0.0000%
8
OrangeX
BTC-USDT$0.9991
0.0003995 Eth
$1,190,782,415.00
16,908.227 BTC
0.0000%
9
Binance
ETH-USDT$0.9992
0.0003990 Eth
$1,172,936,878.00
461,120.551 ETH
0.0000%
10
Pionex
BTC-USDT$0.9987
0.0003997 Eth
$1,122,107,925.00
15,942.052 BTC
0.0000%
11
DigiFinex
BTC-USDT$0.9992
0.0003994 Eth
$897,778,200.00
12,943.207 BTC
0.0000%
12
OKX
BTC-USDT$0.9992
0.0003994 Eth
$847,892,452.00
12,019.651 BTC
0.0000%
13
Toobit
ETH-USDT$0.9991
0.0003991 Eth
$783,202,856.00
307,933.252 ETH
0.0000%
14
WhiteBIT
BTC-USDT$0.9991
0.0003994 Eth
$748,373,008.00
10,787.732 BTC
0.0000%
15
MEXC
BTC-USDT$0.9991
0.0003991 Eth
$670,584,641.00
9,660.420 BTC
0.0000%
16
BitMart
BTC-USDT$0.9991
0.0003995 Eth
$599,040,095.00
8,636.734 BTC
0.0000%
17
XT.COM
BTC-USDT$0.9989
0.0003992 Eth
$508,538,601.00
7,222.217 BTC
0.0000%
18
Binance
SOL-USDT$0.9991
0.0003995 Eth
$491,450,126.00
2,899,938.094 SOL
0.0000%
19
OrangeX
ETH-USDT$0.9991
0.0003995 Eth
$464,579,889.00
182,630.543 ETH
0.0000%
20
AscendEX (BitMax)
BTC-USDT$0.9989
0.0003994 Eth
$460,462,107.00
6,640.729 BTC
0.0000%
21
Bybit
ETH-USDT$0.999
0.0003994 Eth
$455,204,090.00
179,047.546 ETH
0.0000%
22
LBank
BTC-USDT$0.9991
0.0003994 Eth
$444,902,835.00
6,411.749 BTC
0.0000%
23
DigiFinex
ETH-USDT$0.9992
0.0003994 Eth
$411,897,405.00
164,570.070 ETH
0.0000%
24
OKX
ETH-USDT$0.9989
0.0003994 Eth
$408,492,527.00
160,492.970 ETH
0.0000%
25
Pionex
ETH-USDT$0.9991
0.0003995 Eth
$403,010,870.00
158,434.434 ETH
0.0000%
26
HTX
BTC-USDT$0.9992
0.0003994 Eth
$388,678,164.00
5,514.749 BTC
0.0000%
27
Binance
DOGE-USDT$0.9989
0.0003995 Eth
$361,895,200.00
2,224,149,398.000 DOGE
0.0250%
28
P2B
ETH-USDT$0.999
0.0003991 Eth
$359,372,787.00
143,512.912 ETH
0.0000%
29
Gate.io
ETH-USDT$0.9992
0.0003994 Eth
$357,386,252.00
140,681.483 ETH
0.0000%
30
XT.COM
ETH-USDT$0.9994
0.0003993 Eth
$326,331,694.00
128,241.894 ETH
0.0000%
31
Bitget
BTC-USDT$0.9991
0.0003995 Eth
$258,115,289.00
3,663.936 BTC
0.0000%
32
AscendEX (BitMax)
ETH-USDT$0.9989
0.0003994 Eth
$252,861,089.00
101,085.293 ETH
0.0000%
33
LATOKEN
BTC-USDT$0.9991
0.0003994 Eth
$248,383,420.00
3,581.105 BTC
0.0000%
34
Biconomy.com
BTC-USDT$0.9991
0.0003994 Eth
$236,797,716.00
3,362.135 BTC
0.0000%
35
Gate.io
BTC-USDT$0.9992
0.0003994 Eth
$231,826,882.00
3,289.414 BTC
0.0000%
36
Bitunix
ETH-USDT$0.999
0.0003994 Eth
$228,868,441.00
91,515.242 ETH
0.0000%
37
BTSE
BTC-USDT$0.9991
0.0003995 Eth
$225,116,719.00
3,246.211 BTC
0.0000%
38
Bybit
USDC-USDT$0.9992
0.0003994 Eth
$199,612,284.00
199,611,753.940 USDC
0.0022%
39
Ourbit
ETH-USDT$0.999
0.0003990 Eth
$198,541,881.00
78,047.006 ETH
0.0000%
40
KuCoin
BTC-USDT$0.9991
0.0003995 Eth
$179,450,908.00
2,586.933 BTC
0.0000%
41
LBank
ETH-USDT$0.999
0.0003991 Eth
$178,633,407.00
71,361.290 ETH
0.0000%
42
Binance
NEIRO-USDT$0.9991
0.0003995 Eth
$166,220,846.00
104,307,683,848.000 NEIRO
1.1707%
43
OKX
DOGE-USDT$0.9989
0.0003994 Eth
$163,286,949.00
1,004,669,621.697 DOGE
0.0113%
44
Binance
BNB-USDT$0.9991
0.0003995 Eth
$159,552,635.00
276,129.697 BNB
0.0000%
45
Coinstore
ETH-USDT$0.999
0.0003994 Eth
$158,812,377.00
62,397.271 ETH
0.0000%
46
KuCoin
ETH-USDT$0.9991
0.0003995 Eth
$151,327,839.00
60,464.962 ETH
0.0000%
47
Biconomy.com
ETH-USDT$0.9991
0.0003994 Eth
$149,611,313.00
58,824.033 ETH
0.0000%
48
Bitget
ETH-USDT$0.9991
0.0003995 Eth
$139,522,551.00
54,957.588 ETH
0.0000%
49
Bybit
SOL-USDT$0.9992
0.0003994 Eth
$130,401,494.00
768,949.163 SOL
0.0000%
50
Dex-Trade
BTC-USDT$0.9991
0.0003982 Eth
$127,551,461.00
1,838.440 BTC
0.0000%
51
Binance
XRP-USDT$0.9991
0.0003994 Eth
$125,689,255.00
245,391,772.000 XRP
0.0028%
52
BigONE
ETH-USDT$0.9992
0.0003994 Eth
$113,189,061.00
45,230.037 ETH
0.0000%
53
Binance
WIF-USDT$0.9991
0.0003995 Eth
$108,410,790.00
44,945,374.340 WIF
0.0005%
54
BTSE
ETH-USDT$0.999
0.0003990 Eth
$99,337,068.00
39,670.149 ETH
0.0000%
55
Gate.io
DOGE-USDT$0.9992
0.0003994 Eth
$91,921,441.00
564,340,718.006 DOGE
0.0063%
56
Hotcoin
DOGE-USDT$0.9991
0.0003994 Eth
$89,370,425.00
564,395,357.220 DOGE
0.0063%
57
Bitget
DOGE-USDT$0.9991
0.0003995 Eth
$88,334,968.00
542,341,690.446 DOGE
0.0061%
58
Coinbase Exchange
BTC-USDT$0.9992
0.0003994 Eth
$75,257,224.00
1,084.814 BTC
0.0000%
59
Binance
MASK-USDT$0.9991
0.0003995 Eth
$71,734,114.00
22,770,848.500 MASK
0.0003%
60
Bybit
XRP-USDT$0.9992
0.0003994 Eth
$70,688,661.00
138,171,980.500 XRP
0.0016%
61
Bybit
MNT-USDT$0.9992
0.0003994 Eth
$69,642,150.00
117,195,050.020 MNT
0.0013%
62
Bybit
DOGE-USDT$0.9992
0.0003994 Eth
$69,489,453.00
426,562,153.300 DOGE
0.0048%
63
Slex
BTC-USDT$0.9989
0.0003992 Eth
$66,686,170.00
947.009 BTC
0.0000%
64
Bitget
SOL-USDT$0.9991
0.0003995 Eth
$66,141,290.00
390,391.912 SOL
0.0000%
65
BingX
BTC-USDT$0.9992
0.0003994 Eth
$62,822,246.00
891.766 BTC
0.0000%
66
Bitget
BGB-USDT$0.9991
0.0003995 Eth
$62,435,859.00
55,147,128.427 BGB
0.0006%
67
Gate.io
KAS-USDT$0.9991
0.0003995 Eth
$61,596,474.00
533,935,612.740 KAS
0.0060%
68
HTX
DOGE-USDT$0.9992
0.0003994 Eth
$59,376,962.00
365,176,897.780 DOGE
0.0041%
69
CoinEx
BTC-USDT$0.9991
0.0003995 Eth
$56,735,402.00
804.813 BTC
0.0000%
70
Binance
ENA-USDT$0.999
0.0003994 Eth
$56,123,872.00
154,411,739.010 ENA
0.0017%
71
MEXC
MX-USDT$0.9991
0.0003995 Eth
$55,036,975.00
20,101,570.280 MX
0.0002%
72
FameEX
DOGE-USDT$0.999
0.0003994 Eth
$52,788,657.00
325,142,376.036 DOGE
0.0036%
73
DigiFinex
DOGE-USDT$0.9992
0.0003994 Eth
$51,767,493.00
326,407,937.520 DOGE
0.0037%
74
HTX
PEPE-USDT$0.999
0.0003994 Eth
$46,395,439.00
5,065,323,601,562.950 PEPE
56.8498%
75
BVOX
SOL-USDT$0.9991
0.0003995 Eth
$45,727,186.00
270,395.710 SOL
0.0000%
76
Bybit
APEX-USDT$0.9992
0.0003994 Eth
$45,269,982.00
32,575,065.990 APEX
0.0004%
77
Gate.io
SUI-USDT$0.9991
0.0003995 Eth
$44,002,211.00
22,175,276.590 SUI
0.0002%
78
Binance
BOME-USDT$0.9992
0.0003994 Eth
$42,921,048.00
5,251,561,873.000 BOME
0.0589%
79
Bitunix
DOGE-USDT$0.999
0.0003994 Eth
$42,059,811.00
265,629,204.000 DOGE
0.0030%
80
BTSE
DOGE-USDT$0.999
0.0003990 Eth
$38,483,570.00
242,969,050.797 DOGE
0.0027%
81
DigiFinex
SOL-USDT$0.9992
0.0003994 Eth
$38,395,817.00
231,145.050 SOL
0.0000%
82
BingX
ETH-USDT$0.9992
0.0003994 Eth
$37,609,844.00
14,785.600 ETH
0.0000%
83
Binance
RUNE-USDT$0.9991
0.0003995 Eth
$37,113,494.00
6,575,317.700 RUNE
0.0001%
84
Binance
FLOKI-USDT$0.9984
0.0003991 Eth
$34,709,155.00
247,632,154,062.000 FLOKI
2.7793%
85
Bybit
SUI-USDT$0.9992
0.0003994 Eth
$33,936,175.00
17,119,892.420 SUI
0.0002%
86
Gate.io
ETHFI-USDT$0.9991
0.0003995 Eth
$32,625,548.00
22,653,763.210 ETHFI
0.0003%
87
Gate.io
SOL-USDT$0.9992
0.0003994 Eth
$31,956,424.00
188,446.903 SOL
0.0000%
88
MEXC
DOGE-USDT$0.9991
0.0003995 Eth
$31,910,417.00
201,432,445.410 DOGE
0.0023%
89
OKX
PEPE-USDT$0.9989
0.0003994 Eth
$31,775,520.00
3,462,131,535,079.000 PEPE
38.8567%
90
MEXC
SOL-USDT$0.999
0.0003994 Eth
$31,019,712.00
186,770.350 SOL
0.0000%
91
HashKey Global
BTC-USDT$0.9985
0.0003992 Eth
$30,644,792.00
436.085 BTC
0.0000%
92
Azbit
TRX-USDT$0.999
0.0003994 Eth
$30,247,187.00
179,629,473.900 TRX
0.0020%
93
Binance
LTC-USDT$0.9991
0.0003995 Eth
$28,458,059.00
408,622.754 LTC
0.0000%
94
KuCoin
SOL-USDT$0.9991
0.0003995 Eth
$25,111,803.00
151,185.686 SOL
0.0000%
95
WhiteBIT
AVAX-USDT$0.999
0.0003994 Eth
$24,489,589.00
984,307.913 AVAX
0.0000%
96
Bitfinex
BTC-USDT$0.9992
0.0003994 Eth
$23,215,429.00
334.725 BTC
0.0000%
97
Kraken
BTC-USDT$0.999
0.0003993 Eth
$23,058,807.00
332.401 BTC
0.0000%
98
WhiteBIT
NEIRO-USDT$0.9991
0.0003995 Eth
$22,621,471.00
15,108,751,768.000 NEIRO
0.1696%
99
Trubit
BTC-USDT$0.9992
0.0003990 Eth
$22,179,178.00
315.099 BTC
0.0000%
100
Azbit
BTC-USDT$0.9984
0.0003991 Eth
$17,898,818.00
254.181 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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