ETH Price: $3,077.15 (-1.41%)

Token

Tether USD (USDT)
 

Overview

Max Total Supply

62,929,452,093.657795 USDT

Holders

6,358,537 ( 0.019%)

Market

Price

$1.00 @ 0.000326 ETH (+0.20%)

Onchain Market Cap

$63,055,310,997.85

Circulating Supply Market Cap

$127,684,413,180.00

Other Info

Token Contract (WITH 6 Decimals)

Balance
0 USDT

Value
$0.00
0x9b566557352ab1565cd86c441c40a46d55532aeb
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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):$65,128,857,364.00
Market Capitalization:$127,684,413,180.00
Circulating Supply:127,539,192,698.00 USDT
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
Binance
BTC-USDT$0.9996
0.0003250 Eth
$2,622,917,953.00
28,934.521 BTC
0.0000%
2
Pionex
BTC-USDT$1.001
0.0003251 Eth
$2,138,351,806.00
23,568.853 BTC
0.0000%
3
Bybit
BTC-USDT$0.9998
0.0003249 Eth
$2,015,589,304.00
22,243.345 BTC
0.0000%
4
CoinW
BTC-USDT$1.00
0.0003248 Eth
$1,809,446,095.00
19,936.803 BTC
0.0000%
5
Ourbit
BTC-USDT$1.00
0.0003248 Eth
$1,576,323,471.00
17,382.509 BTC
0.0000%
6
Binance
SOL-USDT$1.00
0.0003248 Eth
$1,558,142,707.00
6,528,587.959 SOL
0.0000%
7
Toobit
BTC-USDT$1.001
0.0003263 Eth
$1,407,277,003.00
15,507.932 BTC
0.0000%
8
WhiteBIT
BTC-USDT$1.00
0.0003248 Eth
$1,252,466,377.00
13,807.269 BTC
0.0000%
9
Binance
DOGE-USDT$1.001
0.0003252 Eth
$1,223,822,911.00
3,326,729,805.000 DOGE
0.0039%
10
Binance
XRP-USDT$0.9998
0.0003249 Eth
$1,073,474,761.00
966,464,619.000 XRP
0.0011%
11
Binance
PEPE-USDT$0.9998
0.0003249 Eth
$988,774,614.00
46,057,976,836,260.000 PEPE
54.0754%
12
Pionex
ETH-USDT$1.00
0.0003249 Eth
$985,009,550.00
318,080.834 ETH
0.0000%
13
DigiFinex
BTC-USDT$0.9998
0.0003249 Eth
$972,284,409.00
10,736.628 BTC
0.0000%
14
AscendEX (BitMax)
BTC-USDT$0.9996
0.0003250 Eth
$944,210,656.00
10,430.309 BTC
0.0000%
15
BitMart
BTC-USDT$0.9998
0.0003249 Eth
$923,377,972.00
10,177.067 BTC
0.0000%
16
OKX
BTC-USDT$0.9996
0.0003250 Eth
$919,002,295.00
10,122.741 BTC
0.0000%
17
Hotcoin
BTC-USDT$1.00
0.0003263 Eth
$888,286,469.00
9,819.049 BTC
0.0000%
18
P2B
BTC-USDT$1.00
0.0003248 Eth
$879,847,625.00
9,698.960 BTC
0.0000%
19
BitMart
ETH-USDT$0.9996
0.0003250 Eth
$836,178,023.00
271,692.781 ETH
0.0000%
20
Bitunix
BTC-USDT$1.001
0.0003251 Eth
$812,815,904.00
8,953.279 BTC
0.0000%
21
Binance
FDUSD-USDT$0.9998
0.0003249 Eth
$744,758,709.00
745,394,353.000 FDUSD
0.0009%
22
Deepcoin
BTC-USDT$1.00
0.0003263 Eth
$658,557,197.00
6,889.684 BTC
0.0000%
23
XT.COM
BTC-USDT$1.00
0.0003248 Eth
$511,308,244.00
5,637.955 BTC
0.0000%
24
AscendEX (BitMax)
ETH-USDT$0.9996
0.0003250 Eth
$508,402,022.00
165,343.048 ETH
0.0000%
25
OKX
DOGE-USDT$0.9998
0.0003249 Eth
$504,729,877.00
1,372,711,803.524 DOGE
0.0016%
26
Bybit
ETH-USDT$0.9998
0.0003249 Eth
$492,163,430.00
158,964.689 ETH
0.0000%
27
Hotcoin
DOGE-USDT$1.00
0.0003263 Eth
$488,400,394.00
1,347,524,316.433 DOGE
0.0016%
28
LBank
BTC-USDT$1.00
0.0003248 Eth
$478,539,948.00
5,276.769 BTC
0.0000%
29
MEXC
BTC-USDT$1.00
0.0003263 Eth
$439,941,844.00
4,864.470 BTC
0.0000%
30
Gate.io
ETH-USDT$1.00
0.0003248 Eth
$439,400,346.00
142,100.613 ETH
0.0000%
31
DigiFinex
ETH-USDT$0.9998
0.0003249 Eth
$420,801,051.00
136,813.718 ETH
0.0000%
32
Azbit
BTC-USDT$1.00
0.0003248 Eth
$404,200,066.00
4,463.185 BTC
0.0000%
33
Bybit
XRP-USDT$0.9998
0.0003249 Eth
$393,900,660.00
354,530,532.230 XRP
0.0004%
34
Binance
BONK-USDT$1.001
0.0003264 Eth
$391,519,666.00
7,531,232,092,722.000 BONK
8.8422%
35
BTSE
BTC-USDT$1.00
0.0003248 Eth
$375,701,153.00
4,141.547 BTC
0.0000%
36
LATOKEN
BTC-USDT$1.00
0.0003248 Eth
$361,790,384.00
3,989.479 BTC
0.0000%
37
OKX
ETH-USDT$0.9998
0.0003249 Eth
$346,163,812.00
111,828.402 ETH
0.0000%
38
Gate.io
BTC-USDT$1.00
0.0003248 Eth
$342,382,086.00
3,784.828 BTC
0.0000%
39
Bitunix
ETH-USDT$1.00
0.0003248 Eth
$338,318,206.00
109,888.584 ETH
0.0000%
40
Binance
ADA-USDT$0.9998
0.0003249 Eth
$313,082,028.00
422,692,605.000 ADA
0.0005%
41
OKX
SOL-USDT$0.9998
0.0003249 Eth
$312,504,557.00
1,308,481.000 SOL
0.0000%
42
BigONE
BTC-USDT$1.001
0.0003252 Eth
$310,121,872.00
3,419.205 BTC
0.0000%
43
Bybit
SOL-USDT$0.9998
0.0003249 Eth
$305,395,792.00
1,280,510.611 SOL
0.0000%
44
OKX
XRP-USDT$0.9998
0.0003249 Eth
$301,479,922.00
270,536,389.969 XRP
0.0003%
45
WhiteBIT
SOL-USDT$0.9998
0.0003249 Eth
$301,022,797.00
1,235,540.346 SOL
0.0000%
46
Bitget
DOGE-USDT$1.00
0.0003249 Eth
$295,756,970.00
805,841,258.739 DOGE
0.0009%
47
Biconomy.com
BTC-USDT$0.9999
0.0003248 Eth
$262,209,765.00
2,894.195 BTC
0.0000%
48
Bitget
BTC-USDT$1.00
0.0003249 Eth
$259,972,089.00
2,870.577 BTC
0.0000%
49
Binance
WIF-USDT$0.9998
0.0003249 Eth
$251,667,533.00
68,453,122.590 WIF
0.0001%
50
Bitget
PEPE-USDT$1.00
0.0003249 Eth
$250,466,062.00
11,658,490,491,189.000 PEPE
13.6879%
51
Binance
BNB-USDT$0.9998
0.0003249 Eth
$247,657,393.00
397,945.794 BNB
0.0000%
52
FameEX
DOGE-USDT$1.00
0.0003248 Eth
$245,209,859.00
666,835,998.210 DOGE
0.0008%
53
Binance
HBAR-USDT$1.00
0.0003248 Eth
$242,712,899.00
2,257,778,377.000 HBAR
0.0027%
54
Binance
SHIB-USDT$1.00
0.0003264 Eth
$241,491,187.00
9,651,403,225,947.000 SHIB
11.3314%
55
LATOKEN
ETH-USDT$1.00
0.0003248 Eth
$232,135,622.00
75,388.570 ETH
0.0000%
56
KuCoin
BTC-USDT$1.00
0.0003248 Eth
$223,748,032.00
2,467.101 BTC
0.0000%
57
CoinW
DOGE-USDT$1.00
0.0003248 Eth
$212,671,339.00
584,427,879.518 DOGE
0.0007%
58
Gate.io
XRP-USDT$1.00
0.0003248 Eth
$209,168,839.00
189,109,321.214 XRP
0.0002%
59
OKX
PEPE-USDT$0.9998
0.0003249 Eth
$203,737,999.00
9,486,395,128,198.000 PEPE
11.1377%
60
LBank
ETH-USDT$0.9996
0.0003250 Eth
$202,337,103.00
65,807.931 ETH
0.0000%
61
Binance
FLOKI-USDT$0.9998
0.0003249 Eth
$199,700,457.00
760,668,540,179.000 FLOKI
0.8931%
62
Bitunix
DOGE-USDT$1.00
0.0003248 Eth
$181,377,512.00
498,129,157.000 DOGE
0.0006%
63
Coinstore
BTC-USDT$1.00
0.0003248 Eth
$165,173,380.00
1,819.814 BTC
0.0000%
64
DigiFinex
DOGE-USDT$0.9998
0.0003249 Eth
$159,455,571.00
438,615,508.510 DOGE
0.0005%
65
Bitunix
XRP-USDT$1.00
0.0003248 Eth
$158,452,916.00
140,356,338.000 XRP
0.0002%
66
KuCoin
ETH-USDT$1.00
0.0003248 Eth
$156,803,368.00
50,928.570 ETH
0.0000%
67
Coinstore
ETH-USDT$1.00
0.0003248 Eth
$145,750,874.00
46,996.441 ETH
0.0000%
68
Bitget
ETH-USDT$1.00
0.0003249 Eth
$144,248,677.00
46,568.043 ETH
0.0000%
69
Gate.io
SOL-USDT$0.9998
0.0003249 Eth
$143,555,016.00
602,157.288 SOL
0.0000%
70
WEEX
DOGE-USDT$1.00
0.0003248 Eth
$136,265,253.00
371,495,944.514 DOGE
0.0004%
71
LBank
SOL-USDT$0.9998
0.0003249 Eth
$130,832,767.00
537,091.202 SOL
0.0000%
72
Bybit
USDC-USDT$0.9998
0.0003249 Eth
$127,828,229.00
127,857,917.850 USDC
0.0002%
73
KuCoin
SOL-USDT$0.9998
0.0003249 Eth
$126,247,130.00
518,377.004 SOL
0.0000%
74
Bitget
SOL-USDT$1.00
0.0003249 Eth
$125,787,840.00
528,692.631 SOL
0.0000%
75
DigiFinex
SOL-USDT$0.9998
0.0003249 Eth
$124,426,693.00
510,730.480 SOL
0.0000%
76
WhiteBIT
ADA-USDT$1.00
0.0003249 Eth
$115,969,591.00
158,096,499.110 ADA
0.0002%
77
Deepcoin
DOGE-USDT$0.9999
0.0003261 Eth
$110,739,852.00
311,314,408.150 DOGE
0.0004%
78
Binance
BOME-USDT$1.001
0.0003251 Eth
$110,228,360.00
10,418,048,103.000 BOME
0.0122%
79
Bitget
XRP-USDT$1.00
0.0003249 Eth
$109,213,799.00
98,827,545.310 XRP
0.0001%
80
Fastex
BTC-USDT$1.00
0.0003263 Eth
$107,655,632.00
1,190.409 BTC
0.0000%
81
WhiteBIT
DOGE-USDT$1.00
0.0003248 Eth
$105,123,641.00
288,540,201.000 DOGE
0.0003%
82
Bybit
MNT-USDT$1.00
0.0003249 Eth
$103,347,772.00
143,441,560.860 MNT
0.0002%
83
BTSE
XRP-USDT$1.00
0.0003271 Eth
$100,424,777.00
89,623,165.249 XRP
0.0001%
84
KuCoin
XRP-USDT$0.9998
0.0003249 Eth
$97,330,403.00
86,293,319.891 XRP
0.0001%
85
Deepcoin
XRP-USDT$1.001
0.0003263 Eth
$95,763,572.00
92,700,163.184 XRP
0.0001%
86
HTX
ETH-USDT$1.00
0.0003248 Eth
$94,217,113.00
30,393.483 ETH
0.0000%
87
MEXC
XRP-USDT$1.00
0.0003263 Eth
$94,114,406.00
83,904,266.150 XRP
0.0001%
88
Binance
ARB-USDT$0.9998
0.0003249 Eth
$87,048,406.00
126,920,046.700 ARB
0.0001%
89
BTSE
DOGE-USDT$1.00
0.0003269 Eth
$84,822,424.00
234,919,213.105 DOGE
0.0003%
90
WhiteBIT
WIF-USDT$1.00
0.0003248 Eth
$83,574,185.00
23,799,980.760 WIF
0.0000%
91
Ourbit
SOL-USDT$1.00
0.0003248 Eth
$77,723,457.00
326,217.740 SOL
0.0000%
92
WhiteBIT
LINK-USDT$1.00
0.0003271 Eth
$69,375,946.00
4,849,755.800 LINK
0.0000%
93
CoinW
XRP-USDT$1.00
0.0003249 Eth
$68,355,724.00
60,620,397.600 XRP
0.0001%
94
Slex
BTC-USDT$1.00
0.0003249 Eth
$67,553,540.00
744.974 BTC
0.0000%
95
DigiFinex
GRASS-USDT$0.9998
0.0003249 Eth
$66,378,550.00
27,945,781.856 GRASS
0.0000%
96
CoinEx
BTC-USDT$0.9999
0.0003262 Eth
$64,338,718.00
709.177 BTC
0.0000%
97
BYDFi
BTC-USDT$0.9998
0.0003249 Eth
$56,441,250.00
623.404 BTC
0.0000%
98
WhiteBIT
AVAX-USDT$0.9998
0.0003249 Eth
$55,100,382.00
1,582,040.713 AVAX
0.0000%
99
WhiteBIT
TRX-USDT$0.9998
0.0003249 Eth
$54,400,771.00
269,026,138.660 TRX
0.0003%
100
BingX
BTC-USDT$0.9996
0.0003250 Eth
$45,124,455.00
497.681 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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