ETH Price: $3,753.37 (-3.11%)

Token

Tether USD (USDT)
 

Overview

Max Total Supply

74,928,719,896.684091 USDT

Holders

6,535,528 ( -0.033%)

Market

Price

$1.00 @ 0.000267 ETH (+0.17%)

Onchain Market Cap

$75,003,648,616.58

Circulating Supply Market Cap

$138,386,614,755.00

Other Info

Token Contract (WITH 6 Decimals)

Balance
0 USDT

Value
$0.00
0x105055c1a48466220ae8343df234f26f05555505
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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):$169,793,249,006.00
Market Capitalization:$138,386,614,755.00
Circulating Supply:138,308,884,820.00 USDT
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
Binance
BTC-USDT$1.00
0.0002667 Eth
$5,359,558,200.00
55,019.519 BTC
0.0000%
2
Bybit
BTC-USDT$1.00
0.0002667 Eth
$4,094,673,222.00
42,016.255 BTC
0.0000%
3
Binance
ETH-USDT$1.00
0.0002666 Eth
$4,002,643,605.00
1,068,404.434 ETH
0.0000%
4
Ourbit
BTC-USDT$1.00
0.0002666 Eth
$3,211,656,535.00
32,938.496 BTC
0.0000%
5
Binance
DOGE-USDT$1.00
0.0002660 Eth
$2,501,683,749.00
6,000,694,287.000 DOGE
0.0039%
6
Binance
XRP-USDT$1.00
0.0002661 Eth
$2,485,813,094.00
1,106,171,269.000 XRP
0.0007%
7
Pionex
ETH-USDT$1.00
0.0002668 Eth
$2,482,365,393.00
660,795.989 ETH
0.0000%
8
Binance
PEPE-USDT$1.00
0.0002667 Eth
$2,440,763,816.00
95,561,914,975,931.000 PEPE
61.7955%
9
MEXC
ETH-USDT$1.00
0.0002668 Eth
$2,307,927,673.00
615,634.914 ETH
0.0000%
10
WhiteBIT
BTC-USDT$1.00
0.0002668 Eth
$2,214,217,056.00
22,721.717 BTC
0.0000%
11
DigiFinex
BTC-USDT$1.00
0.0002667 Eth
$2,182,906,116.00
22,393.520 BTC
0.0000%
12
Binance
USDC-USDT$1.001
0.0002661 Eth
$2,166,429,056.00
2,165,530,093.000 USDC
0.0014%
13
BitMart
ETH-USDT$1.00
0.0002668 Eth
$2,073,056,959.00
552,968.916 ETH
0.0000%
14
Binance
SOL-USDT$1.00
0.0002662 Eth
$1,830,922,419.00
8,359,492.966 SOL
0.0000%
15
Bybit
ETH-USDT$1.00
0.0002667 Eth
$1,798,165,421.00
480,565.785 ETH
0.0000%
16
Binance
FDUSD-USDT$1.00
0.0002668 Eth
$1,786,551,461.00
1,789,338,074.000 FDUSD
0.0012%
17
BVOX
ETH-USDT$1.00
0.0002667 Eth
$1,746,614,898.00
465,786.053 ETH
0.0000%
18
Bitget
ETH-USDT$1.00
0.0002667 Eth
$1,740,516,836.00
465,009.859 ETH
0.0000%
19
BitMart
BTC-USDT$1.00
0.0002668 Eth
$1,617,409,267.00
16,595.116 BTC
0.0000%
20
Bitget
BTC-USDT$1.00
0.0002667 Eth
$1,519,537,051.00
15,585.579 BTC
0.0000%
21
LBank
BTC-USDT$1.00
0.0002666 Eth
$1,499,807,567.00
15,378.993 BTC
0.0000%
22
OKX
BTC-USDT$1.00
0.0002667 Eth
$1,482,245,622.00
15,238.152 BTC
0.0000%
23
DigiFinex
ETH-USDT$0.9997
0.0002662 Eth
$1,480,754,983.00
395,022.044 ETH
0.0000%
24
OKX
ETH-USDT$1.00
0.0002667 Eth
$1,471,820,793.00
395,660.458 ETH
0.0000%
25
Bitunix
BTC-USDT$1.00
0.0002668 Eth
$1,458,973,318.00
14,970.372 BTC
0.0000%
26
Ourbit
ETH-USDT$1.00
0.0002667 Eth
$1,241,655,342.00
330,136.008 ETH
0.0000%
27
XT.COM
ETH-USDT$1.001
0.0002661 Eth
$1,101,378,206.00
293,877.104 ETH
0.0000%
28
OKX
DOGE-USDT$1.00
0.0002667 Eth
$988,589,615.00
2,391,738,326.998 DOGE
0.0015%
29
AscendEX (BitMax)
BTC-USDT$1.00
0.0002667 Eth
$940,555,645.00
9,648.232 BTC
0.0000%
30
Bitunix
ETH-USDT$1.00
0.0002668 Eth
$926,384,496.00
247,167.427 ETH
0.0000%
31
Hotcoin
ETH-USDT$1.00
0.0002664 Eth
$903,062,715.00
240,630.729 ETH
0.0000%
32
Bybit
XRP-USDT$1.00
0.0002667 Eth
$800,110,156.00
356,833,281.340 XRP
0.0002%
33
Binance
NEIRO-USDT$1.00
0.0002667 Eth
$776,552,583.00
399,400,656,351.000 NEIRO
0.2583%
34
WhiteBIT
SOL-USDT$1.00
0.0002667 Eth
$770,090,657.00
3,544,474.830 SOL
0.0000%
35
Binance
ADA-USDT$1.00
0.0002660 Eth
$764,079,568.00
743,561,333.900 ADA
0.0005%
36
HTX
BTC-USDT$1.00
0.0002667 Eth
$752,340,664.00
7,716.022 BTC
0.0000%
37
Bybit
SOL-USDT$1.00
0.0002667 Eth
$705,973,710.00
3,240,925.766 SOL
0.0000%
38
Bitget
XRP-USDT$1.00
0.0002667 Eth
$699,137,073.00
310,621,926.950 XRP
0.0002%
39
Bitget
DOGE-USDT$1.00
0.0002667 Eth
$684,793,193.00
1,646,833,115.692 DOGE
0.0011%
40
Gate.io
ETH-USDT$1.00
0.0002667 Eth
$666,164,405.00
178,018.435 ETH
0.0000%
41
Gate.io
BTC-USDT$1.00
0.0002667 Eth
$653,287,400.00
6,710.246 BTC
0.0000%
42
BigONE
BTC-USDT$1.00
0.0002669 Eth
$642,993,474.00
6,596.220 BTC
0.0000%
43
Binance
1MBABYDOGE-USDT$1.00
0.0002667 Eth
$592,635,808.00
102,481,244,876.000 1MBABYDOGE
0.0663%
44
Binance
SUI-USDT$1.00
0.0002665 Eth
$548,853,193.00
143,903,629.900 SUI
0.0001%
45
WhiteBIT
XRP-USDT$1.00
0.0002668 Eth
$523,506,978.00
236,002,866.620 XRP
0.0002%
46
Bitget
PEPE-USDT$1.00
0.0002667 Eth
$514,417,232.00
20,151,560,967,790.000 PEPE
13.0311%
47
AscendEX (BitMax)
ETH-USDT$1.00
0.0002667 Eth
$510,566,396.00
135,984.817 ETH
0.0000%
48
Bybit
DOGE-USDT$1.00
0.0002667 Eth
$498,545,919.00
1,205,485,666.700 DOGE
0.0008%
49
Binance
SHIB-USDT$1.00
0.0002665 Eth
$490,447,226.00
17,798,873,052,686.000 SHIB
11.5097%
50
OKX
PEPE-USDT$1.00
0.0002667 Eth
$481,933,437.00
19,095,220,330,127.000 PEPE
12.3480%
51
OKX
XRP-USDT$1.00
0.0002667 Eth
$466,992,593.00
208,709,032.289 XRP
0.0001%
52
WhiteBIT
DOGE-USDT$1.00
0.0002666 Eth
$459,620,687.00
1,115,531,997.200 DOGE
0.0007%
53
LBank
ETH-USDT$1.00
0.0002668 Eth
$443,578,595.00
118,316.415 ETH
0.0000%
54
Binance
AVAX-USDT$1.00
0.0002662 Eth
$430,267,769.00
9,340,044.020 AVAX
0.0000%
55
Bybit
USDC-USDT$1.00
0.0002667 Eth
$428,034,128.00
427,887,289.320 USDC
0.0003%
56
Gate.io
DOGE-USDT$1.00
0.0002667 Eth
$423,458,730.00
1,023,221,265.114 DOGE
0.0007%
57
Biconomy.com
BTC-USDT$1.00
0.0002667 Eth
$418,634,264.00
4,294.129 BTC
0.0000%
58
Coinbase Exchange
USDT-USDC$1.00
0.0002668 Eth
$392,820,794.00
392,711,637.140 USDT
0.0003%
59
Azbit
BTC-USDT$1.00
0.0002667 Eth
$391,528,176.00
4,009.782 BTC
0.0000%
60
BTSE
BTC-USDT$1.00
0.0002668 Eth
$387,500,410.00
3,974.880 BTC
0.0000%
61
Gate.io
XRP-USDT$1.00
0.0002667 Eth
$386,840,809.00
171,706,076.146 XRP
0.0001%
62
Binance
HBAR-USDT$1.00
0.0002667 Eth
$382,014,720.00
1,329,607,470.000 HBAR
0.0009%
63
Binance
PNUT-USDT$1.00
0.0002667 Eth
$379,416,358.00
322,669,419.100 PNUT
0.0002%
64
Binance
FLOKI-USDT$1.00
0.0002665 Eth
$374,946,574.00
1,482,309,417,310.000 FLOKI
0.9585%
65
Coinstore
ETH-USDT$1.00
0.0002668 Eth
$368,943,824.00
97,910.839 ETH
0.0000%
66
OKX
SOL-USDT$1.00
0.0002667 Eth
$362,985,907.00
1,669,636.725 SOL
0.0000%
67
KuCoin
BTC-USDT$1.00
0.0002667 Eth
$361,288,885.00
3,705.763 BTC
0.0000%
68
Biconomy.com
ETH-USDT$1.00
0.0002661 Eth
$353,249,783.00
93,987.137 ETH
0.0000%
69
MEXC
DOGE-USDT$1.00
0.0002668 Eth
$352,083,992.00
855,553,190.570 DOGE
0.0006%
70
Bitunix
DOGE-USDT$1.00
0.0002668 Eth
$345,025,857.00
839,159,252.000 DOGE
0.0005%
71
Deepcoin
SOL-USDT$1.00
0.0002659 Eth
$336,273,551.00
1,585,463.423 SOL
0.0000%
72
KuCoin
ETH-USDT$1.00
0.0002667 Eth
$326,612,234.00
86,980.540 ETH
0.0000%
73
DigiFinex
DOGE-USDT$1.00
0.0002667 Eth
$316,830,076.00
769,603,741.150 DOGE
0.0005%
74
Binance
LTC-USDT$1.001
0.0002661 Eth
$302,801,509.00
2,680,805.291 LTC
0.0000%
75
Binance
DOT-USDT$1.00
0.0002662 Eth
$297,939,416.00
34,116,263.320 DOT
0.0000%
76
Bitunix
XRP-USDT$1.00
0.0002668 Eth
$294,259,521.00
132,705,789.000 XRP
0.0001%
77
Binance
ENA-USDT$1.00
0.0002667 Eth
$290,638,571.00
298,650,657.760 ENA
0.0002%
78
Arkham
ETH-USDT$1.00
0.0002668 Eth
$266,906,571.00
70,285.122 ETH
0.0000%
79
Binance
UNI-USDT$1.00
0.0002667 Eth
$264,496,192.00
16,419,267.110 UNI
0.0000%
80
HTX
ETH-USDT$1.00
0.0002667 Eth
$260,446,571.00
69,571.359 ETH
0.0000%
81
Coinstore
BTC-USDT$1.00
0.0002668 Eth
$259,228,722.00
2,653.464 BTC
0.0000%
82
Bybit
MNT-USDT$1.00
0.0002667 Eth
$257,859,880.00
224,162,669.300 MNT
0.0001%
83
Binance
FIL-USDT$1.00
0.0002668 Eth
$246,460,002.00
38,055,933.360 FIL
0.0000%
84
Binance
NEAR-USDT$1.00
0.0002667 Eth
$242,180,800.00
36,853,957.600 NEAR
0.0000%
85
Binance
ARB-USDT$1.00
0.0002668 Eth
$224,731,578.00
229,372,981.200 ARB
0.0001%
86
WhiteBIT
SUI-USDT$1.00
0.0002667 Eth
$222,116,309.00
58,631,817.372 SUI
0.0000%
87
Binance
RUNE-USDT$1.00
0.0002667 Eth
$221,553,118.00
33,931,837.000 RUNE
0.0000%
88
Bitunix
SOL-USDT$1.00
0.0002668 Eth
$208,204,452.00
958,260.229 SOL
0.0000%
89
Deepcoin
DOGE-USDT$1.00
0.0002668 Eth
$201,562,475.00
498,352,545.312 DOGE
0.0003%
90
Gate.io
SOL-USDT$1.00
0.0002667 Eth
$193,045,021.00
884,534.308 SOL
0.0000%
91
HTX
DOGE-USDT$1.00
0.0002667 Eth
$191,650,528.00
457,919,374.436 DOGE
0.0003%
92
Binance
SAND-USDT$1.00
0.0002668 Eth
$188,271,746.00
252,023,936.000 SAND
0.0002%
93
WhiteBIT
ADA-USDT$1.00
0.0002661 Eth
$187,890,350.00
184,400,032.430 ADA
0.0001%
94
DigiFinex
TRX-USDT$1.00
0.0002667 Eth
$187,386,426.00
680,588,531.000 TRX
0.0004%
95
Binance
BOME-USDT$1.00
0.0002666 Eth
$187,067,283.00
21,338,151,630.000 BOME
0.0138%
96
LBank
SOL-USDT$1.00
0.0002668 Eth
$184,970,684.00
852,047.003 SOL
0.0000%
97
OKX
SUI-USDT$1.00
0.0002667 Eth
$161,908,161.00
42,607,272.905 SUI
0.0000%
98
WhiteBIT
ARB-USDT$1.00
0.0002666 Eth
$150,535,633.00
152,347,625.404 ARB
0.0001%
99
KuCoin
SOL-USDT$1.00
0.0002667 Eth
$149,370,756.00
686,977.018 SOL
0.0000%
100
WhiteBIT
AVAX-USDT$1.00
0.0002668 Eth
$133,713,112.00
2,931,164.431 AVAX
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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