ETH Price: $3,308.82 (-4.48%)

Token

Tether USD (USDT)
 

Overview

Max Total Supply

69,929,452,093.657795 USDT

Holders

6,424,127 ( 0.137%)

Market

Price

$1.00 @ 0.000302 ETH (-0.05%)

Onchain Market Cap

$69,855,256,944.99

Circulating Supply Market Cap

$132,767,396,346.00

Other Info

Token Contract (WITH 6 Decimals)

Balance
0 USDT

Value
$0.00
0x7b1b44eee37520e74bbe078832a8679e978b7fe6
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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):$181,245,749,924.00
Market Capitalization:$132,767,396,346.00
Circulating Supply:132,744,005,560.00 USDT
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
Binance
BTC-USDT$1.001
0.0003034 Eth
$5,627,651,707.00
60,324.797 BTC
0.0000%
2
BVOX
BTC-USDT$1.00
0.0003040 Eth
$4,242,716,623.00
45,483.837 BTC
0.0000%
3
Bybit
BTC-USDT$1.00
0.0003035 Eth
$3,883,642,921.00
41,553.024 BTC
0.0000%
4
CoinW
BTC-USDT$0.9999
0.0003045 Eth
$3,404,986,937.00
37,104.938 BTC
0.0000%
5
Ourbit
BTC-USDT$1.00
0.0003035 Eth
$3,388,533,557.00
36,333.901 BTC
0.0000%
6
Toobit
BTC-USDT$1.00
0.0003042 Eth
$2,835,453,644.00
30,392.878 BTC
0.0000%
7
WhiteBIT
BTC-USDT$1.00
0.0003042 Eth
$2,755,389,037.00
30,061.291 BTC
0.0000%
8
Binance
ETH-USDT$1.00
0.0003046 Eth
$2,603,152,607.00
771,702.433 ETH
0.0006%
9
Hotcoin
BTC-USDT$1.00
0.0003043 Eth
$2,279,704,340.00
24,876.345 BTC
0.0000%
10
DigiFinex
BTC-USDT$1.001
0.0003038 Eth
$2,182,871,074.00
23,741.586 BTC
0.0000%
11
Binance
USDC-USDT$1.001
0.0003038 Eth
$2,030,724,216.00
2,028,493,306.000 USDC
1.6539%
12
BitMart
BTC-USDT$0.9997
0.0003042 Eth
$1,844,827,801.00
20,127.796 BTC
0.0000%
13
Tapbit
ETH-USDT$1.001
0.0003038 Eth
$1,784,468,200.00
529,205.303 ETH
0.0004%
14
Toobit
ETH-USDT$1.00
0.0003049 Eth
$1,697,010,879.00
502,840.747 ETH
0.0004%
15
Binance
DOGE-USDT$1.00
0.0003044 Eth
$1,692,942,702.00
4,365,288,565.000 DOGE
3.5592%
16
WEEX
ETH-USDT$1.00
0.0003046 Eth
$1,553,318,941.00
459,374.911 ETH
0.0004%
17
Bitunix
BTC-USDT$0.9999
0.0003044 Eth
$1,520,579,691.00
16,603.680 BTC
0.0000%
18
Deepcoin
BTC-USDT$1.00
0.0003046 Eth
$1,406,661,552.00
15,122.497 BTC
0.0000%
19
P2B
BTC-USDT$1.001
0.0003034 Eth
$1,357,443,969.00
14,777.121 BTC
0.0000%
20
OKX
BTC-USDT$1.001
0.0003034 Eth
$1,317,367,883.00
14,110.617 BTC
0.0000%
21
XT.COM
BTC-USDT$1.001
0.0003040 Eth
$1,273,243,600.00
13,638.593 BTC
0.0000%
22
Binance
SOL-USDT$1.00
0.0003044 Eth
$1,268,611,571.00
5,467,772.422 SOL
0.0045%
23
BVOX
ETH-USDT$1.00
0.0003040 Eth
$1,184,737,353.00
351,131.822 ETH
0.0003%
24
Binance
XRP-USDT$0.9999
0.0003045 Eth
$1,116,229,738.00
808,608,146.000 XRP
0.6593%
25
CoinW
ETH-USDT$1.00
0.0003041 Eth
$1,080,702,755.00
328,187.802 ETH
0.0003%
26
BitMart
ETH-USDT$0.9997
0.0003042 Eth
$1,046,954,882.00
318,649.070 ETH
0.0003%
27
Binance
FDUSD-USDT$1.001
0.0003038 Eth
$973,958,161.00
975,378,163.000 FDUSD
0.7953%
28
Bybit
ETH-USDT$1.00
0.0003035 Eth
$940,495,974.00
278,889.995 ETH
0.0002%
29
MEXC
ETH-USDT$1.00
0.0003042 Eth
$930,365,173.00
281,872.100 ETH
0.0002%
30
AscendEX (BitMax)
BTC-USDT$1.001
0.0003034 Eth
$924,186,776.00
10,061.063 BTC
0.0000%
31
DigiFinex
ETH-USDT$1.001
0.0003038 Eth
$896,815,625.00
270,723.011 ETH
0.0002%
32
LBank
BTC-USDT$1.001
0.0003048 Eth
$875,784,485.00
9,495.699 BTC
0.0000%
33
Ourbit
ETH-USDT$0.9999
0.0003044 Eth
$776,486,276.00
230,028.654 ETH
0.0002%
34
LATOKEN
BTC-USDT$1.00
0.0003046 Eth
$768,480,857.00
8,378.582 BTC
0.0000%
35
HTX
BTC-USDT$1.00
0.0003040 Eth
$756,899,949.00
8,111.077 BTC
0.0000%
36
MEXC
BTC-USDT$1.00
0.0003045 Eth
$740,944,877.00
8,079.375 BTC
0.0000%
37
XT.COM
ETH-USDT$1.00
0.0003044 Eth
$723,067,191.00
214,282.235 ETH
0.0002%
38
Hotcoin
ETH-USDT$0.9999
0.0003044 Eth
$721,135,170.00
218,877.445 ETH
0.0002%
39
OKX
ETH-USDT$1.00
0.0003035 Eth
$673,742,579.00
199,689.717 ETH
0.0002%
40
OKX
DOGE-USDT$1.00
0.0003035 Eth
$671,926,966.00
1,739,238,739.801 DOGE
1.4181%
41
WhiteBIT
ETH-USDT$1.00
0.0003045 Eth
$659,109,485.00
200,008.127 ETH
0.0002%
42
Tapbit
BTC-USDT$1.00
0.0003046 Eth
$640,816,885.00
6,867.155 BTC
0.0000%
43
Bitunix
ETH-USDT$0.9999
0.0003044 Eth
$620,396,610.00
188,479.950 ETH
0.0002%
44
Binance
XLM-USDT$0.9999
0.0003045 Eth
$563,914,999.00
1,214,229,771.000 XLM
0.9900%
45
Binance
BNB-USDT$0.9999
0.0003045 Eth
$528,500,228.00
846,195.952 BNB
0.0007%
46
Gate.io
ETH-USDT$1.00
0.0003041 Eth
$521,136,397.00
153,770.492 ETH
0.0001%
47
Binance
ADA-USDT$1.001
0.0003038 Eth
$482,391,304.00
515,574,648.000 ADA
0.4204%
48
BTSE
BTC-USDT$0.9998
0.0003042 Eth
$469,050,345.00
5,117.997 BTC
0.0000%
49
OrangeX
ETH-USDT$0.9998
0.0003045 Eth
$468,273,323.00
138,596.616 ETH
0.0001%
50
Gate.io
BTC-USDT$1.00
0.0003041 Eth
$452,116,568.00
4,838.932 BTC
0.0000%
51
Coinbase Exchange
USDT-USD$1.00
0.0003035 Eth
$438,904,577.00
438,825,588.640 USDT
0.3578%
52
Binance
SUI-USDT$1.001
0.0003038 Eth
$427,598,700.00
131,553,607.200 SUI
0.1073%
53
LATOKEN
ETH-USDT$1.00
0.0003040 Eth
$421,534,283.00
127,418.285 ETH
0.0001%
54
Bitget
XRP-USDT$1.00
0.0003035 Eth
$408,995,888.00
296,387,596.565 XRP
0.2417%
55
Bybit
XRP-USDT$1.00
0.0003035 Eth
$407,929,947.00
296,550,283.560 XRP
0.2418%
56
Azbit
BTC-USDT$1.00
0.0003045 Eth
$405,470,229.00
4,334.130 BTC
0.0000%
57
Bitget
DOGE-USDT$1.00
0.0003035 Eth
$377,060,999.00
972,420,393.645 DOGE
0.7928%
58
LBank
ETH-USDT$1.00
0.0003039 Eth
$363,920,625.00
110,000.712 ETH
0.0001%
59
Hotcoin
DOGE-USDT$1.00
0.0003040 Eth
$345,571,398.00
907,644,405.243 DOGE
0.7400%
60
KuCoin
BTC-USDT$1.00
0.0003039 Eth
$343,873,793.00
3,741.823 BTC
0.0000%
61
Coinstore
BTC-USDT$1.00
0.0003042 Eth
$333,075,233.00
3,567.673 BTC
0.0000%
62
Bybit
SOL-USDT$1.00
0.0003035 Eth
$315,796,850.00
1,363,736.427 SOL
0.0011%
63
Bitget
BTC-USDT$1.00
0.0003035 Eth
$309,320,139.00
3,311.547 BTC
0.0000%
64
Binance
FTM-USDT$1.001
0.0003038 Eth
$307,791,899.00
305,364,529.000 FTM
0.2490%
65
Binance
PNUT-USDT$1.00
0.0003042 Eth
$300,377,634.00
271,202,628.600 PNUT
0.2211%
66
Bybit
USDC-USDT$1.00
0.0003035 Eth
$290,752,977.00
290,709,457.970 USDC
0.2370%
67
Binance
AVAX-USDT$1.00
0.0003042 Eth
$286,468,630.00
6,927,959.470 AVAX
0.0056%
68
WhiteBIT
SOL-USDT$1.00
0.0003042 Eth
$283,786,752.00
1,241,379.982 SOL
0.0010%
69
OKX
SOL-USDT$1.001
0.0003034 Eth
$272,163,421.00
1,173,784.935 SOL
0.0010%
70
Biconomy.com
ETH-USDT$1.001
0.0003044 Eth
$267,283,828.00
79,173.919 ETH
0.0001%
71
MEXC
DOGE-USDT$1.00
0.0003046 Eth
$266,425,648.00
708,430,589.970 DOGE
0.5776%
72
Binance
SEI-USDT$1.001
0.0003038 Eth
$262,740,169.00
406,065,628.400 SEI
0.3311%
73
Bybit
DOGE-USDT$1.00
0.0003035 Eth
$259,393,938.00
669,511,889.700 DOGE
0.5459%
74
Coinstore
ETH-USDT$1.00
0.0003042 Eth
$253,787,501.00
75,092.391 ETH
0.0001%
75
Bitunix
DOGE-USDT$0.9999
0.0003044 Eth
$245,432,279.00
650,013,053.000 DOGE
0.5300%
76
CoinW
DOGE-USDT$1.002
0.0003046 Eth
$239,478,145.00
630,559,089.792 DOGE
0.5141%
77
Deepcoin
SOL-USDT$1.00
0.0003044 Eth
$238,718,757.00
1,035,905.308 SOL
0.0008%
78
WEEX
SOL-USDT$1.00
0.0003045 Eth
$236,027,496.00
1,016,424.932 SOL
0.0008%
79
WEEX
DOGE-USDT$1.001
0.0003044 Eth
$230,438,528.00
612,898,551.377 DOGE
0.4997%
80
DigiFinex
DOGE-USDT$1.001
0.0003038 Eth
$214,981,825.00
563,501,626.960 DOGE
0.4594%
81
KuCoin
ETH-USDT$1.00
0.0003039 Eth
$208,660,713.00
63,072.306 ETH
0.0001%
82
OKX
XRP-USDT$1.00
0.0003035 Eth
$207,485,301.00
149,996,584.542 XRP
0.1223%
83
Bitget
ETH-USDT$1.00
0.0003035 Eth
$198,989,443.00
58,964.608 ETH
0.0000%
84
HTX
DOGE-USDT$1.00
0.0003039 Eth
$196,829,935.00
503,465,305.056 DOGE
0.4105%
85
BTSE
ETH-USDT$1.00
0.0003039 Eth
$196,763,759.00
59,462.522 ETH
0.0000%
86
HTX
ETH-USDT$1.00
0.0003039 Eth
$191,246,961.00
56,764.584 ETH
0.0000%
87
Binance
ARB-USDT$1.00
0.0003046 Eth
$187,690,210.00
210,743,136.100 ARB
0.1718%
88
LBank
SOL-USDT$1.00
0.0003039 Eth
$181,462,333.00
790,761.136 SOL
0.0006%
89
OrangeX
DOGE-USDT$0.9998
0.0003049 Eth
$178,145,485.00
460,241,899.000 DOGE
0.3753%
90
Binance
NEIRO-USDT$1.00
0.0003042 Eth
$175,270,170.00
99,969,099,961.000 NEIRO
81.5083%
91
Binance
NEAR-USDT$1.00
0.0003042 Eth
$175,141,083.00
27,811,994.100 NEAR
0.0227%
92
Deepcoin
DOGE-USDT$1.00
0.0003041 Eth
$173,088,694.00
444,037,859.658 DOGE
0.3620%
93
Binance
DOT-USDT$1.00
0.0003045 Eth
$172,039,951.00
21,392,546.710 DOT
0.0174%
94
WhiteBIT
DOGE-USDT$1.00
0.0003042 Eth
$164,872,700.00
436,433,041.200 DOGE
0.3558%
95
Bitunix
SOL-USDT$0.9999
0.0003044 Eth
$160,822,094.00
705,019.553 SOL
0.0006%
96
LBank
DOGE-USDT$1.00
0.0003039 Eth
$143,123,437.00
376,294,919.000 DOGE
0.3068%
97
Slex
BTC-USDT$1.00
0.0003035 Eth
$133,774,003.00
1,433.401 BTC
0.0000%
98
WhiteBIT
ADA-USDT$1.001
0.0003040 Eth
$123,961,500.00
133,503,111.520 ADA
0.1088%
99
BYDFi
BTC-USDT$0.9999
0.0003037 Eth
$120,574,506.00
1,310.227 BTC
0.0000%
100
DigiFinex
USDC-USDT$1.001
0.0003038 Eth
$90,227,324.00
90,143,524.000 USDC
0.0735%

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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