ETH Price: $3,619.18 (-2.56%)

Token

Tether USD (USDT)
 

Overview

Max Total Supply

74,928,719,896.684091 USDT

Holders

6,530,901 (0.00%)

Market

Price

$1.00 @ 0.000276 ETH (-0.18%)

Onchain Market Cap

$74,871,399,425.96

Circulating Supply Market Cap

$138,673,340,241.00

Other Info

Token Contract (WITH 6 Decimals)

Balance
1,120 USDT

Value
$1,119.14 ( ~0.309224447282195 Eth) [0.0000%]
0xa2e121e60b14f165dec1c23347598e1cefcf20a0
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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):$105,675,146,220.00
Market Capitalization:$138,673,340,241.00
Circulating Supply:138,618,977,176.00 USDT
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
Binance
BTC-USDT$1.001
0.0002770 Eth
$4,957,763,900.00
51,345.108 BTC
0.0000%
2
Bybit
BTC-USDT$1.001
0.0002769 Eth
$4,065,852,105.00
42,032.391 BTC
0.0000%
3
BVOX
BTC-USDT$1.001
0.0002769 Eth
$3,695,029,773.00
38,270.345 BTC
0.0000%
4
Binance
ETH-USDT$1.00
0.0002774 Eth
$3,339,974,242.00
914,500.418 ETH
0.0000%
5
WEEX
BTC-USDT$1.001
0.0002770 Eth
$3,208,007,871.00
33,194.835 BTC
0.0000%
6
Ourbit
BTC-USDT$1.001
0.0002773 Eth
$2,990,294,232.00
30,980.625 BTC
0.0000%
7
Binance
XRP-USDT$1.00
0.0002774 Eth
$2,952,735,442.00
1,364,698,618.000 XRP
0.0011%
8
Toobit
BTC-USDT$1.001
0.0002776 Eth
$2,570,083,370.00
26,611.562 BTC
0.0000%
9
OrangeX
BTC-USDT$1.001
0.0002771 Eth
$2,470,757,703.00
25,581.215 BTC
0.0000%
10
MEXC
BTC-USDT$1.001
0.0002764 Eth
$2,435,500,405.00
25,244.589 BTC
0.0000%
11
Tapbit
ETH-USDT$1.001
0.0002766 Eth
$2,356,362,278.00
644,656.590 ETH
0.0000%
12
Toobit
ETH-USDT$1.001
0.0002776 Eth
$2,139,384,754.00
585,526.077 ETH
0.0000%
13
Hotcoin
BTC-USDT$1.001
0.0002776 Eth
$2,009,154,100.00
20,870.811 BTC
0.0000%
14
WEEX
ETH-USDT$1.001
0.0002776 Eth
$1,811,692,061.00
502,022.936 ETH
0.0000%
15
Binance
PEPE-USDT$1.00
0.0002787 Eth
$1,727,566,164.00
72,054,471,255,654.000 PEPE
56.3082%
16
Bybit
ETH-USDT$1.001
0.0002769 Eth
$1,543,633,078.00
421,990.698 ETH
0.0000%
17
BitMart
ETH-USDT$1.001
0.0002774 Eth
$1,527,469,809.00
424,162.901 ETH
0.0000%
18
MEXC
ETH-USDT$1.001
0.0002768 Eth
$1,521,133,438.00
421,195.931 ETH
0.0000%
19
BVOX
ETH-USDT$1.001
0.0002781 Eth
$1,470,787,543.00
402,504.644 ETH
0.0000%
20
Bitget
ETH-USDT$1.001
0.0002769 Eth
$1,451,079,215.00
397,086.530 ETH
0.0000%
21
Binance
SOL-USDT$1.001
0.0002774 Eth
$1,441,478,081.00
6,770,689.116 SOL
0.0000%
22
Bitunix
BTC-USDT$1.001
0.0002779 Eth
$1,354,992,129.00
14,074.031 BTC
0.0000%
23
BitMart
BTC-USDT$1.001
0.0002774 Eth
$1,236,745,797.00
12,852.527 BTC
0.0000%
24
DigiFinex
ETH-USDT$1.001
0.0002769 Eth
$1,231,305,647.00
340,207.429 ETH
0.0000%
25
OKX
ETH-USDT$1.001
0.0002768 Eth
$1,201,628,542.00
329,323.262 ETH
0.0000%
26
Bitget
BTC-USDT$1.001
0.0002769 Eth
$1,199,572,545.00
12,427.518 BTC
0.0000%
27
OKX
BTC-USDT$1.001
0.0002770 Eth
$1,164,640,475.00
12,058.464 BTC
0.0000%
28
XT.COM
BTC-USDT$1.001
0.0002766 Eth
$1,116,782,114.00
11,569.250 BTC
0.0000%
29
LBank
BTC-USDT$1.001
0.0002776 Eth
$1,086,529,726.00
11,277.759 BTC
0.0000%
30
CoinW
ETH-USDT$1.001
0.0002772 Eth
$981,388,241.00
271,437.306 ETH
0.0000%
31
OKX
DOGE-USDT$1.001
0.0002768 Eth
$974,108,702.00
2,477,685,678.872 DOGE
0.0019%
32
Binance
FDUSD-USDT$1.001
0.0002773 Eth
$949,136,937.00
949,967,424.000 FDUSD
0.0007%
33
AscendEX (BitMax)
BTC-USDT$1.001
0.0002768 Eth
$942,426,598.00
9,775.388 BTC
0.0000%
34
Bybit
XRP-USDT$1.001
0.0002769 Eth
$863,260,736.00
398,822,075.470 XRP
0.0003%
35
Bitunix
ETH-USDT$1.001
0.0002776 Eth
$805,766,529.00
223,839.352 ETH
0.0000%
36
HTX
BTC-USDT$1.001
0.0002769 Eth
$795,995,301.00
8,234.993 BTC
0.0000%
37
Bitget
XRP-USDT$1.001
0.0002769 Eth
$746,875,217.00
343,505,707.627 XRP
0.0003%
38
Gate.io
BTC-USDT$1.00
0.0002769 Eth
$681,026,779.00
7,072.679 BTC
0.0000%
39
Binance
BNB-USDT$1.001
0.0002769 Eth
$648,198,654.00
954,529.095 BNB
0.0000%
40
Gate.io
ETH-USDT$1.00
0.0002769 Eth
$634,564,194.00
174,598.330 ETH
0.0000%
41
WhiteBIT
XRP-USDT$1.001
0.0002766 Eth
$611,449,089.00
261,021,812.000 XRP
0.0002%
42
Binance
ADA-USDT$1.001
0.0002776 Eth
$597,353,672.00
605,875,045.200 ADA
0.0005%
43
MEXC
DOGE-USDT$1.001
0.0002769 Eth
$590,076,653.00
1,513,038,554.470 DOGE
0.0012%
44
BigONE
BTC-USDT$0.9997
0.0002754 Eth
$586,360,109.00
6,082.208 BTC
0.0000%
45
Gate.io
XRP-USDT$1.00
0.0002769 Eth
$558,741,201.00
257,825,832.872 XRP
0.0002%
46
Tapbit
BTC-USDT$1.001
0.0002773 Eth
$556,464,854.00
5,764.621 BTC
0.0000%
47
Bybit
SOL-USDT$1.001
0.0002769 Eth
$554,994,872.00
2,610,876.456 SOL
0.0000%
48
Bitget
DOGE-USDT$1.001
0.0002769 Eth
$529,591,709.00
1,352,988,430.389 DOGE
0.0011%
49
Gate.io
DOGE-USDT$1.00
0.0002769 Eth
$528,802,844.00
1,345,392,081.294 DOGE
0.0011%
50
OKX
XRP-USDT$1.001
0.0002768 Eth
$526,512,221.00
241,595,858.134 XRP
0.0002%
51
MEXC
PEPE-USDT$1.001
0.0002777 Eth
$511,187,792.00
22,318,168,855,435.000 PEPE
17.4409%
52
Binance
ME-USDT$1.001
0.0002776 Eth
$506,685,936.00
98,755,211.070 ME
0.0001%
53
AscendEX (BitMax)
ETH-USDT$1.001
0.0002768 Eth
$504,415,150.00
139,604.457 ETH
0.0000%
54
Binance
1MBABYDOGE-USDT$1.001
0.0002782 Eth
$466,054,182.00
82,547,151,022.000 1MBABYDOGE
0.0645%
55
Gate.io
PEPE-USDT$1.002
0.0002772 Eth
$464,195,691.00
19,321,160,582,930.000 PEPE
15.0989%
56
BTSE
BTC-USDT$1.001
0.0002772 Eth
$448,514,623.00
4,650.461 BTC
0.0000%
57
Binance
SUI-USDT$1.001
0.0002769 Eth
$442,472,616.00
119,472,875.300 SUI
0.0001%
58
Binance
TRX-USDT$1.001
0.0002773 Eth
$436,444,082.00
1,658,428,760.300 TRX
0.0013%
59
Bitunix
XRP-USDT$1.001
0.0002776 Eth
$393,205,490.00
170,626,946.000 XRP
0.0001%
60
Binance
HBAR-USDT$1.00
0.0002774 Eth
$389,200,274.00
1,377,466,184.000 HBAR
0.0011%
61
Azbit
BTC-USDT$1.001
0.0002776 Eth
$385,883,244.00
3,984.174 BTC
0.0000%
62
Bybit
DOGE-USDT$1.001
0.0002769 Eth
$383,368,183.00
979,636,196.500 DOGE
0.0008%
63
Arkham
ETH-USDT$1.001
0.0002776 Eth
$366,921,270.00
100,118.488 ETH
0.0000%
64
Kraken
USDT-USD$1.001
0.0002768 Eth
$342,112,521.00
341,917,627.656 USDT
0.0003%
65
KuCoin
XRP-USDT$1.001
0.0002769 Eth
$340,345,175.00
145,864,332.956 XRP
0.0001%
66
OKX
SOL-USDT$1.001
0.0002768 Eth
$330,621,657.00
1,553,862.892 SOL
0.0000%
67
BigONE
ETH-USDT$1.001
0.0002768 Eth
$325,853,015.00
90,095.394 ETH
0.0000%
68
KuCoin
BTC-USDT$1.001
0.0002769 Eth
$323,321,608.00
3,346.538 BTC
0.0000%
69
Bitunix
DOGE-USDT$1.001
0.0002776 Eth
$318,410,180.00
823,409,010.000 DOGE
0.0006%
70
Bybit
PEPE-USDT$1.001
0.0002769 Eth
$316,292,541.00
13,249,694,849,024.000 PEPE
10.3542%
71
OrangeX
ETH-USDT$1.001
0.0002763 Eth
$303,401,529.00
82,740.288 ETH
0.0000%
72
LBank
MOVE-USDT$1.001
0.0002776 Eth
$292,898,091.00
378,078,049.420 MOVE
0.0003%
73
Coinstore
ETH-USDT$1.001
0.0002778 Eth
$291,857,751.00
79,546.917 ETH
0.0000%
74
Binance
PNUT-USDT$1.001
0.0002769 Eth
$286,557,798.00
269,547,325.600 PNUT
0.0002%
75
Binance
LTC-USDT$1.001
0.0002769 Eth
$271,559,770.00
2,488,010.588 LTC
0.0000%
76
MEXC
SOL-USDT$1.001
0.0002768 Eth
$259,675,946.00
1,210,723.160 SOL
0.0000%
77
KuCoin
ETH-USDT$1.001
0.0002769 Eth
$255,598,048.00
70,591.775 ETH
0.0000%
78
WEEX
SOL-USDT$1.001
0.0002770 Eth
$254,673,786.00
1,195,067.037 SOL
0.0000%
79
Binance
ENA-USDT$1.001
0.0002769 Eth
$250,717,527.00
266,509,888.770 ENA
0.0002%
80
Bybit
MNT-USDT$1.001
0.0002769 Eth
$245,034,625.00
211,008,513.040 MNT
0.0002%
81
Binance
CRV-USDT$1.001
0.0002769 Eth
$244,387,224.00
221,161,656.100 CRV
0.0002%
82
HTX
ETH-USDT$1.001
0.0002769 Eth
$240,557,459.00
65,787.404 ETH
0.0000%
83
Binance
UNI-USDT$1.001
0.0002769 Eth
$224,726,269.00
14,592,910.910 UNI
0.0000%
84
Gate.io
SOL-USDT$1.00
0.0002769 Eth
$221,118,385.00
1,044,942.100 SOL
0.0000%
85
Binance
AAVE-USDT$1.00
0.0002775 Eth
$210,098,183.00
782,085.327 AAVE
0.0000%
86
Coinstore
BTC-USDT$1.001
0.0002771 Eth
$208,334,000.00
2,151.188 BTC
0.0000%
87
Binance
FLOKI-USDT$1.001
0.0002769 Eth
$206,377,407.00
917,502,132,712.000 FLOKI
0.7170%
88
HTX
DOGE-USDT$1.001
0.0002769 Eth
$202,415,307.00
510,411,372.654 DOGE
0.0004%
89
BYDFi
BTC-USDT$1.001
0.0002766 Eth
$199,818,611.00
2,071.441 BTC
0.0000%
90
WhiteBIT
SUI-USDT$1.001
0.0002787 Eth
$194,624,493.00
53,640,869.953 SUI
0.0000%
91
OrangeX
DOGE-USDT$1.001
0.0002776 Eth
$194,163,917.00
492,571,835.121 DOGE
0.0004%
92
Binance
NEAR-USDT$1.001
0.0002769 Eth
$188,797,010.00
29,644,642.700 NEAR
0.0000%
93
Binance
DOT-USDT$1.00
0.0002775 Eth
$188,199,941.00
22,832,650.350 DOT
0.0000%
94
Binance
ARB-USDT$1.00
0.0002777 Eth
$187,380,757.00
199,521,288.300 ARB
0.0002%
95
Bitunix
SOL-USDT$1.001
0.0002781 Eth
$184,996,204.00
869,025.476 SOL
0.0000%
96
Deepcoin
DOGE-USDT$1.001
0.0002776 Eth
$164,191,343.00
444,923,470.237 DOGE
0.0003%
97
LBank
DOGE-USDT$1.001
0.0002776 Eth
$137,379,631.00
355,438,602.000 DOGE
0.0003%
98
WhiteBIT
HBAR-USDT$1.00
0.0002769 Eth
$137,248,280.00
485,885,061.600 HBAR
0.0004%
99
CoinW
SOL-USDT$1.001
0.0002772 Eth
$123,988,010.00
577,365.842 SOL
0.0000%
100
KuCoin
SOL-USDT$1.001
0.0002769 Eth
$121,098,001.00
561,494.835 SOL
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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