ETH Price: $3,478.85 (+1.26%)

Token

Tether USD (USDT)
 

Overview

Max Total Supply

76,926,220,145.483487 USDT

Holders

6,579,779 ( 0.051%)

Market

Price

$1.00 @ 0.000288 ETH (+0.32%)

Onchain Market Cap

$77,003,146,365.63

Circulating Supply Market Cap

$140,546,707,627.00

Other Info

Token Contract (WITH 6 Decimals)

Balance
0 USDT

Value
$0.00
0x4732423bb2b182f50ab31c95bd1898e80cd7fad0
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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):$256,575,539,358.00
Market Capitalization:$140,546,707,627.00
Circulating Supply:140,623,286,117.00 USDT
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
OrangeX
BTC-USDT$1.00
0.0002879 Eth
$7,950,826,204.00
82,829.832 BTC
0.0000%
2
Binance
ETH-USDT$1.00
0.0002878 Eth
$5,068,952,655.00
1,524,185.535 ETH
0.0000%
3
BVOX
BTC-USDT$1.00
0.0002878 Eth
$5,032,294,753.00
52,437.584 BTC
0.0000%
4
OrangeX
ETH-USDT$1.00
0.0002879 Eth
$4,483,004,166.00
1,348,017.130 ETH
0.0000%
5
Pionex
BTC-USDT$1.00
0.0002878 Eth
$4,418,915,332.00
45,973.014 BTC
0.0000%
6
Ourbit
BTC-USDT$0.9997
0.0002879 Eth
$4,078,392,602.00
42,521.687 BTC
0.0000%
7
Bybit
BTC-USDT$1.00
0.0002880 Eth
$3,634,129,873.00
37,766.606 BTC
0.0000%
8
FameEX
ETH-USDT$0.9999
0.0002879 Eth
$3,405,374,876.00
1,024,523.260 ETH
0.0000%
9
Toobit
BTC-USDT$1.00
0.0002879 Eth
$3,399,046,060.00
35,385.604 BTC
0.0000%
10
Tapbit
ETH-USDT$1.00
0.0002880 Eth
$3,140,994,921.00
943,982.296 ETH
0.0000%
11
CoinW
BTC-USDT$0.9997
0.0002878 Eth
$2,579,600,777.00
26,464.034 BTC
0.0000%
12
Binance
XRP-USDT$1.00
0.0002880 Eth
$2,542,680,541.00
1,169,629,931.000 XRP
0.0017%
13
MEXC
ETH-USDT$0.9997
0.0002878 Eth
$2,511,642,551.00
723,433.852 ETH
0.0000%
14
Bitget
BTC-USDT$1.00
0.0002880 Eth
$2,413,911,499.00
25,159.358 BTC
0.0000%
15
BitMart
ETH-USDT$1.00
0.0002878 Eth
$2,393,971,977.00
689,451.240 ETH
0.0000%
16
Pionex
ETH-USDT$1.00
0.0002879 Eth
$2,351,011,613.00
703,507.171 ETH
0.0000%
17
Bitget
ETH-USDT$1.00
0.0002880 Eth
$2,265,559,736.00
682,223.381 ETH
0.0000%
18
BitMart
BTC-USDT$1.00
0.0002878 Eth
$2,151,813,834.00
22,046.665 BTC
0.0000%
19
Bybit
ETH-USDT$1.00
0.0002880 Eth
$2,105,988,744.00
633,270.920 ETH
0.0000%
20
OKX
ETH-USDT$0.9997
0.0002879 Eth
$2,044,416,230.00
617,884.393 ETH
0.0000%
21
Binance
SOL-USDT$1.00
0.0002880 Eth
$2,006,961,354.00
10,709,426.086 SOL
0.0000%
22
MEXC
BTC-USDT$0.9997
0.0002878 Eth
$1,968,055,344.00
20,174.151 BTC
0.0000%
23
Ourbit
ETH-USDT$1.00
0.0002880 Eth
$1,659,908,797.00
496,779.908 ETH
0.0000%
24
Gate.io
ETH-USDT$1.00
0.0002878 Eth
$1,578,997,624.00
477,664.131 ETH
0.0000%
25
Gate.io
BTC-USDT$1.00
0.0002878 Eth
$1,363,201,393.00
14,257.928 BTC
0.0000%
26
Bitunix
BTC-USDT$1.00
0.0002877 Eth
$1,359,416,117.00
13,914.218 BTC
0.0000%
27
Hotcoin
BTC-USDT$1.00
0.0002880 Eth
$1,332,027,404.00
13,652.589 BTC
0.0000%
28
LBank
BTC-USDT$0.9998
0.0002879 Eth
$1,288,698,658.00
13,195.352 BTC
0.0000%
29
OKX
DOGE-USDT$0.9997
0.0002879 Eth
$1,145,144,020.00
3,837,688,923.050 DOGE
0.0057%
30
P2B
BTC-USDT$1.00
0.0002878 Eth
$1,089,119,569.00
11,147.812 BTC
0.0000%
31
Binance
FDUSD-USDT$0.9998
0.0002879 Eth
$1,025,672,251.00
1,027,929,752.000 FDUSD
0.0015%
32
AscendEX (BitMax)
BTC-USDT$0.9997
0.0002878 Eth
$955,028,728.00
9,791.172 BTC
0.0000%
33
Bitunix
ETH-USDT$1.00
0.0002877 Eth
$894,701,356.00
257,604.729 ETH
0.0000%
34
Binance
PEPE-USDT$0.9997
0.0002880 Eth
$868,981,558.00
53,775,789,037,501.000 PEPE
79.3897%
35
Binance
SUI-USDT$0.9997
0.0002880 Eth
$860,632,848.00
214,648,894.500 SUI
0.0003%
36
HTX
BTC-USDT$0.9997
0.0002878 Eth
$806,878,174.00
8,400.593 BTC
0.0000%
37
MEXC
DOGE-USDT$0.9997
0.0002878 Eth
$799,511,917.00
2,527,844,848.890 DOGE
0.0037%
38
Tapbit
BTC-USDT$0.9997
0.0002878 Eth
$709,585,087.00
7,397.604 BTC
0.0000%
39
Bybit
SOL-USDT$1.00
0.0002880 Eth
$703,861,597.00
3,762,842.313 SOL
0.0000%
40
Bitget
DOGE-USDT$1.00
0.0002880 Eth
$655,468,090.00
2,201,656,760.810 DOGE
0.0033%
41
Bybit
XRP-USDT$1.00
0.0002880 Eth
$648,696,635.00
298,600,433.080 XRP
0.0004%
42
Bitget
XRP-USDT$1.00
0.0002880 Eth
$641,838,156.00
296,032,207.661 XRP
0.0004%
43
FameEX
SOL-USDT$0.9993
0.0002902 Eth
$613,467,839.00
3,275,095.061 SOL
0.0000%
44
Binance
ADA-USDT$1.00
0.0002880 Eth
$535,011,234.00
632,069,376.300 ADA
0.0009%
45
AscendEX (BitMax)
ETH-USDT$0.9997
0.0002878 Eth
$532,755,041.00
153,464.731 ETH
0.0000%
46
WEEX
ETH-USDT$1.00
0.0002892 Eth
$528,680,330.00
158,295.581 ETH
0.0000%
47
Gate.io
DOGE-USDT$1.00
0.0002878 Eth
$513,717,978.00
1,717,733,808.818 DOGE
0.0025%
48
LBank
PENGU-USDT$1.00
0.0002880 Eth
$506,421,894.00
18,222,945,102.920 PENGU
0.0269%
49
KuCoin
BTC-USDT$0.9992
0.0002878 Eth
$490,444,219.00
5,030.118 BTC
0.0000%
50
Biconomy.com
BTC-USDT$0.9998
0.0002877 Eth
$486,858,120.00
5,066.609 BTC
0.0000%
51
Bitget
BGB-USDT$1.00
0.0002880 Eth
$474,911,145.00
117,009,752.979 BGB
0.0002%
52
Binance
TRX-USDT$1.00
0.0002880 Eth
$468,434,513.00
1,928,726,654.000 TRX
0.0028%
53
Bybit
DOGE-USDT$1.00
0.0002880 Eth
$456,651,923.00
1,535,507,395.200 DOGE
0.0023%
54
Gate.io
XRP-USDT$1.00
0.0002878 Eth
$441,301,016.00
203,023,415.892 XRP
0.0003%
55
KuCoin
ETH-USDT$0.9992
0.0002878 Eth
$432,815,866.00
124,745.933 ETH
0.0000%
56
Coinbase Exchange
USDT-USDC$0.9999
0.0002880 Eth
$424,415,393.00
424,440,783.080 USDT
0.0006%
57
OKX
SOL-USDT$0.9997
0.0002879 Eth
$414,784,055.00
2,218,943.771 SOL
0.0000%
58
Binance
HBAR-USDT$1.00
0.0002878 Eth
$405,415,896.00
1,547,549,484.000 HBAR
0.0023%
59
Bybit
MOVE-USDT$1.00
0.0002880 Eth
$400,756,835.00
499,671,384.000 MOVE
0.0007%
60
MEXC
SOL-USDT$1.00
0.0002879 Eth
$391,786,961.00
2,033,677.700 SOL
0.0000%
61
Binance
ENA-USDT$1.00
0.0002880 Eth
$377,914,628.00
395,299,008.550 ENA
0.0006%
62
WhiteBIT
DOGE-USDT$0.9998
0.0002877 Eth
$374,984,614.00
1,185,726,906.400 DOGE
0.0018%
63
OKX
XRP-USDT$0.9997
0.0002879 Eth
$371,064,946.00
170,894,576.301 XRP
0.0003%
64
HTX
ETH-USDT$0.9997
0.0002878 Eth
$327,710,190.00
98,108.708 ETH
0.0000%
65
Binance
UNI-USDT$1.00
0.0002880 Eth
$302,954,485.00
24,246,318.880 UNI
0.0000%
66
WEEX
XRP-USDT$0.9997
0.0002911 Eth
$300,425,148.00
134,246,655.944 XRP
0.0002%
67
Binance
MOVE-USDT$1.00
0.0002878 Eth
$294,174,831.00
372,889,193.700 MOVE
0.0006%
68
WhiteBIT
SUI-USDT$1.00
0.0002880 Eth
$293,461,117.00
65,222,922.518 SUI
0.0001%
69
Azbit
XRP-USDT$0.9997
0.0002902 Eth
$274,248,729.00
126,445,304.560 XRP
0.0002%
70
OrangeX
DOGE-USDT$1.00
0.0002879 Eth
$273,128,610.00
906,138,424.000 DOGE
0.0013%
71
Hibt
ETH-USDT$1.00
0.0002880 Eth
$265,740,960.00
80,270.550 ETH
0.0000%
72
MEXC
SUI-USDT$1.00
0.0002879 Eth
$257,989,561.00
57,516,517.250 SUI
0.0001%
73
KuCoin
XRP-USDT$0.9992
0.0002878 Eth
$255,668,473.00
112,087,552.158 XRP
0.0002%
74
Bitunix
DOGE-USDT$1.00
0.0002877 Eth
$248,422,588.00
782,541,627.000 DOGE
0.0012%
75
Gate.io
SOL-USDT$1.00
0.0002878 Eth
$239,513,539.00
1,285,737.968 SOL
0.0000%
76
Binance
NEAR-USDT$0.9992
0.0002878 Eth
$236,123,612.00
47,360,417.400 NEAR
0.0001%
77
OKX
SUI-USDT$0.9997
0.0002879 Eth
$235,674,218.00
58,452,506.785 SUI
0.0001%
78
Bybit
MNT-USDT$1.00
0.0002880 Eth
$232,972,090.00
204,796,354.720 MNT
0.0003%
79
Bitget
SOL-USDT$1.00
0.0002880 Eth
$231,647,310.00
1,236,751.418 SOL
0.0000%
80
Binance
AAVE-USDT$1.00
0.0002908 Eth
$229,789,789.00
761,721.894 AAVE
0.0000%
81
Azbit
SOL-USDT$0.9999
0.0002879 Eth
$226,770,682.00
1,205,830.332 SOL
0.0000%
82
Gate.io
PEPE-USDT$1.00
0.0002880 Eth
$224,046,106.00
13,907,481,540,008.200 PEPE
20.5317%
83
Binance
LTC-USDT$0.9997
0.0002905 Eth
$211,881,039.00
2,219,079.973 LTC
0.0000%
84
Bitunix
XRP-USDT$1.00
0.0002877 Eth
$208,462,803.00
91,310,286.000 XRP
0.0001%
85
Binance
FTM-USDT$0.9997
0.0002880 Eth
$200,225,986.00
213,280,674.000 FTM
0.0003%
86
Binance
PENGU-USDT$1.00
0.0002880 Eth
$199,704,294.00
7,469,902,820.000 PENGU
0.0110%
87
HTX
DOGE-USDT$0.9997
0.0002878 Eth
$191,936,519.00
627,285,517.853 DOGE
0.0009%
88
CoinW
SOL-USDT$1.00
0.0002878 Eth
$186,699,691.00
969,877.918 SOL
0.0000%
89
BTSE
ETH-USDT$0.9997
0.0002902 Eth
$183,331,672.00
53,007.403 ETH
0.0000%
90
Binance
DOT-USDT$1.00
0.0002880 Eth
$171,004,493.00
25,598,997.530 DOT
0.0000%
91
KuCoin
SOL-USDT$1.00
0.0002878 Eth
$168,133,629.00
873,002.256 SOL
0.0000%
92
Bitunix
SOL-USDT$1.00
0.0002877 Eth
$165,604,986.00
860,063.386 SOL
0.0000%
93
Binance
ARB-USDT$1.00
0.0002880 Eth
$165,165,972.00
222,224,610.000 ARB
0.0003%
94
Deepcoin
DOGE-USDT$1.00
0.0002879 Eth
$163,460,163.00
574,410,167.396 DOGE
0.0008%
95
DigiFinex
SOL-USDT$0.9992
0.0002878 Eth
$160,223,171.00
833,977.790 SOL
0.0000%
96
OrangeX
TRX-USDT$1.00
0.0002879 Eth
$158,662,406.00
655,483,192.300 TRX
0.0010%
97
Ourbit
XRP-USDT$0.9997
0.0002879 Eth
$157,197,842.00
71,593,528.320 XRP
0.0001%
98
LBank
MOVE-USDT$0.9998
0.0002877 Eth
$129,635,048.00
152,746,280.490 MOVE
0.0002%
99
BingX
ETH-USDT$1.00
0.0002880 Eth
$114,009,662.00
34,135.084 ETH
0.0000%
100
PointPay
BTC-USDT$1.00
0.0002877 Eth
$108,926,150.00
1,135.706 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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