ETH Price: $2,498.11 (-0.62%)

Token

Tether USD (USDT)
 

Overview

Max Total Supply

76,918,584,460.692261 USDT

Holders

6,931,936 ( 0.151%)

Market

Price

$1.00 @ 0.000400 ETH (-0.08%)

Onchain Market Cap

$76,839,512,155.87

Circulating Supply Market Cap

$142,205,203,849.00

Other Info

Token Contract (WITH 6 Decimals)

Balance
0 USDT

Value
$0.00
0x525014deffe64476b37b50edcddd1ceefaa14ec6
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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):$155,321,189,857.00
Market Capitalization:$142,205,203,849.00
Circulating Supply:142,350,475,496.00 USDT
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
Binance
BTC-USDT$0.9989
0.0004003 Eth
$7,016,921,171.00
78,997.297 BTC
0.0007%
2
Binance
ETH-USDT$0.9992
0.0004001 Eth
$3,224,927,331.00
1,329,882.931 ETH
0.0118%
3
CoinW
BTC-USDT$0.9991
0.0004006 Eth
$2,480,492,177.00
27,991.497 BTC
0.0002%
4
FameEX
ETH-USDT$0.9995
0.0004003 Eth
$2,427,078,768.00
1,000,514.329 ETH
0.0089%
5
Bybit
BTC-USDT$0.9989
0.0004003 Eth
$2,410,521,468.00
27,188.504 BTC
0.0002%
6
BitMart
BTC-USDT$0.9992
0.0004006 Eth
$2,369,510,810.00
26,704.718 BTC
0.0002%
7
OKX
BTC-USDT$0.9989
0.0004003 Eth
$2,321,704,267.00
26,165.053 BTC
0.0002%
8
Toobit
BTC-USDT$0.9992
0.0004001 Eth
$2,168,651,252.00
24,399.187 BTC
0.0002%
9
Tapbit
ETH-USDT$0.9992
0.0004006 Eth
$2,118,446,784.00
873,155.137 ETH
0.0078%
10
Crypto.com Exchange
BTC-USDT$0.9989
0.0004003 Eth
$1,848,946,406.00
20,848.777 BTC
0.0002%
11
Bitget
BTC-USDT$0.9997
0.0004006 Eth
$1,749,747,900.00
19,702.302 BTC
0.0002%
12
Crypto.com Exchange
ETH-USDT$0.9989
0.0004003 Eth
$1,749,042,031.00
700,126.595 ETH
0.0062%
13
Pionex
ETH-USDT$0.9992
0.0004001 Eth
$1,740,424,876.00
715,350.823 ETH
0.0064%
14
Binance
XRP-USDT$0.9997
0.0004006 Eth
$1,692,742,684.00
764,837,651.000 XRP
6.8082%
15
DigiFinex
BTC-USDT$0.9997
0.0004006 Eth
$1,691,731,624.00
19,076.144 BTC
0.0002%
16
WhiteBIT
BTC-USDT$1.00
0.0004006 Eth
$1,506,472,529.00
16,972.737 BTC
0.0002%
17
Hotcoin
BTC-USDT$0.9992
0.0004006 Eth
$1,469,729,709.00
16,580.382 BTC
0.0001%
18
Binance
FDUSD-USDT$0.9997
0.0004006 Eth
$1,403,049,501.00
1,403,788,575.000 FDUSD
12.4959%
19
XT.COM
BTC-USDT$1.00
0.0004006 Eth
$1,324,321,937.00
14,885.261 BTC
0.0001%
20
P2B
BTC-USDT$1.001
0.0004007 Eth
$1,222,090,436.00
13,749.054 BTC
0.0001%
21
Toobit
ETH-USDT$0.9992
0.0004001 Eth
$1,215,959,351.00
501,117.960 ETH
0.0045%
22
WEEX
ETH-USDT$0.9989
0.0003982 Eth
$1,132,504,446.00
465,004.597 ETH
0.0041%
23
Bitunix
BTC-USDT$1.001
0.0004007 Eth
$1,001,051,887.00
11,271.939 BTC
0.0001%
24
OKX
ETH-USDT$0.9989
0.0004003 Eth
$970,738,932.00
400,034.304 ETH
0.0036%
25
Gate.io
BTC-USDT$0.9991
0.0004006 Eth
$946,247,443.00
10,664.201 BTC
0.0001%
26
AscendEX (BitMax)
BTC-USDT$0.9991
0.0004006 Eth
$921,768,850.00
10,402.626 BTC
0.0001%
27
Ourbit
ETH-USDT$0.9991
0.0004006 Eth
$896,568,630.00
367,896.351 ETH
0.0033%
28
BigONE
BTC-USDT$1.00
0.0004006 Eth
$814,032,080.00
9,165.939 BTC
0.0001%
29
Gate.io
ETH-USDT$0.9991
0.0004006 Eth
$806,201,480.00
331,997.516 ETH
0.0030%
30
BitMart
ETH-USDT$0.9992
0.0004006 Eth
$787,958,105.00
315,617.632 ETH
0.0028%
31
Bitget
ETH-USDT$0.9997
0.0004006 Eth
$781,905,370.00
322,134.831 ETH
0.0029%
32
Tapbit
BTC-USDT$0.9992
0.0004001 Eth
$763,229,936.00
8,587.760 BTC
0.0001%
33
CoinW
ETH-USDT$0.9991
0.0004006 Eth
$740,231,762.00
296,654.916 ETH
0.0026%
34
XT.COM
ETH-USDT$1.001
0.0004007 Eth
$632,378,450.00
260,301.361 ETH
0.0023%
35
HTX
BTC-USDT$0.9989
0.0004002 Eth
$627,815,551.00
7,049.105 BTC
0.0001%
36
OrangeX
ETH-USDT$0.9992
0.0004001 Eth
$571,372,165.00
235,147.786 ETH
0.0021%
37
KuCoin
BTC-USDT$0.999
0.0004006 Eth
$564,899,789.00
6,374.810 BTC
0.0001%
38
Binance
DOGE-USDT$0.9983
0.0004002 Eth
$559,714,509.00
2,727,930,359.000 DOGE
24.2828%
39
WhiteBIT
ETH-USDT$0.9989
0.0003978 Eth
$539,115,701.00
214,980.173 ETH
0.0019%
40
AscendEX (BitMax)
ETH-USDT$0.9991
0.0004006 Eth
$516,589,060.00
207,018.978 ETH
0.0018%
41
Bitget
SOL-USDT$0.9997
0.0004006 Eth
$516,260,889.00
3,710,846.689 SOL
0.0330%
42
Bybit
ETH-USDT$0.9989
0.0004003 Eth
$490,555,420.00
202,680.191 ETH
0.0018%
43
Biconomy.com
BTC-USDT$0.9992
0.0004001 Eth
$484,702,080.00
5,451.543 BTC
0.0000%
44
DigiFinex
ETH-USDT$0.9997
0.0004006 Eth
$470,240,327.00
188,278.676 ETH
0.0017%
45
P2B
ETH-USDT$0.9989
0.0004002 Eth
$448,770,818.00
179,646.355 ETH
0.0016%
46
Binance
TRX-USDT$1.001
0.0003991 Eth
$446,962,543.00
1,914,506,452.900 TRX
17.0420%
47
Bybit
IP-USDT$0.9989
0.0004003 Eth
$433,841,623.00
83,386,820.830 IP
0.7423%
48
Bitget
BGB-USDT$0.9997
0.0004006 Eth
$417,898,157.00
95,555,479.743 BGB
0.8506%
49
Binance
BNB-USDT$0.9983
0.0004002 Eth
$395,848,341.00
652,702.230 BNB
0.0058%
50
Bitget
IP-USDT$0.9989
0.0004003 Eth
$379,742,675.00
72,764,393.350 IP
0.6477%
51
Hotcoin
ETH-USDT$0.9991
0.0004001 Eth
$369,950,083.00
148,232.442 ETH
0.0013%
52
Bitunix
ETH-USDT$1.001
0.0004007 Eth
$353,610,445.00
141,462.980 ETH
0.0013%
53
KuCoin
ETH-USDT$0.999
0.0004006 Eth
$350,297,502.00
140,403.951 ETH
0.0012%
54
Bitget
XRP-USDT$0.9997
0.0004006 Eth
$334,231,042.00
150,591,165.143 XRP
1.3405%
55
Gate.io
XRP-USDT$0.9991
0.0004006 Eth
$323,573,328.00
145,767,522.104 XRP
1.2976%
56
WhiteBIT
AVAX-USDT$1.00
0.0004006 Eth
$320,665,822.00
14,610,911.063 AVAX
0.1301%
57
Bybit
XRP-USDT$0.9989
0.0004003 Eth
$314,590,563.00
142,078,816.020 XRP
1.2647%
58
BigONE
ETH-USDT$1.00
0.0004006 Eth
$312,981,368.00
125,227.974 ETH
0.0011%
59
Bybit
SOL-USDT$0.9989
0.0004003 Eth
$312,972,879.00
2,246,115.788 SOL
0.0200%
60
LBank
ETH-USDT$0.9989
0.0004001 Eth
$268,220,337.00
107,456.628 ETH
0.0010%
61
Biconomy.com
ETH-USDT$0.9992
0.0004001 Eth
$250,874,305.00
103,225.757 ETH
0.0009%
62
Gate.io
SOL-USDT$0.9991
0.0004006 Eth
$233,955,672.00
1,682,346.857 SOL
0.0150%
63
Binance
LTC-USDT$0.9991
0.0004001 Eth
$230,390,078.00
2,051,542.584 LTC
0.0183%
64
OKX
DOGE-USDT$0.9989
0.0004003 Eth
$222,847,606.00
1,085,533,308.918 DOGE
9.6629%
65
Binance
S-USDT$0.9997
0.0004006 Eth
$222,324,036.00
304,174,728.900 S
2.7076%
66
Bitfinex
BTC-USDT$0.9991
0.0004003 Eth
$209,632,677.00
2,363.079 BTC
0.0000%
67
Binance
ADA-USDT$0.9997
0.0004006 Eth
$209,502,113.00
316,272,102.300 ADA
2.8153%
68
HTX
ETH-USDT$0.9989
0.0004002 Eth
$209,167,370.00
86,210.556 ETH
0.0008%
69
Hibt
ETH-USDT$0.9993
0.0003993 Eth
$203,446,076.00
83,750.137 ETH
0.0007%
70
KuCoin
XRP-USDT$0.999
0.0004006 Eth
$193,990,507.00
83,444,063.577 XRP
0.7428%
71
DigiFinex
TRX-USDT$0.9997
0.0004006 Eth
$186,183,409.00
805,132,603.700 TRX
7.1669%
72
Dex-Trade
BTC-USDT$0.9992
0.0004006 Eth
$185,586,086.00
2,093.959 BTC
0.0000%
73
Gate.io
DOGE-USDT$0.9991
0.0004006 Eth
$185,499,555.00
903,822,110.680 DOGE
8.0454%
74
Gate.io
ONDO-USDT$0.9989
0.0004003 Eth
$174,566,170.00
181,176,697.260 ONDO
1.6128%
75
CoinW
XRP-USDT$0.9989
0.0004003 Eth
$174,359,806.00
74,888,502.000 XRP
0.6666%
76
MEXC
SOL-USDT$0.9992
0.0004006 Eth
$165,554,302.00
1,147,792.020 SOL
0.0102%
77
MEXC
DOGE-USDT$0.9992
0.0004006 Eth
$161,114,356.00
763,051,251.720 DOGE
6.7923%
78
Binance
HBAR-USDT$0.9997
0.0004006 Eth
$155,075,039.00
823,083,102.000 HBAR
7.3267%
79
DigiFinex
SOL-USDT$0.9997
0.0004006 Eth
$141,123,769.00
976,886.400 SOL
0.0087%
80
KuCoin
SOL-USDT$0.999
0.0004006 Eth
$138,225,440.00
958,167.339 SOL
0.0085%
81
QMall
BTC-USDT$0.999
0.0004006 Eth
$134,515,522.00
1,514.503 BTC
0.0000%
82
HTX
DOGE-USDT$0.9989
0.0004002 Eth
$132,996,310.00
644,571,438.192 DOGE
5.7377%
83
Bitget
PI-USDT$0.9989
0.0004003 Eth
$129,218,567.00
82,316,046.070 PI
0.7327%
84
Crypto.com Exchange
SOL-USDT$0.9997
0.0004006 Eth
$115,673,294.00
799,661.282 SOL
0.0071%
85
OKX
PI-USDT$0.9989
0.0004003 Eth
$114,594,706.00
72,984,517.267 PI
0.6497%
86
Bitunix
XRP-USDT$1.001
0.0004007 Eth
$105,637,841.00
45,319,732.000 XRP
0.4034%
87
Binance
AAVE-USDT$0.9997
0.0004006 Eth
$94,980,127.00
476,821.347 AAVE
0.0042%
88
Bitunix
SOL-USDT$1.001
0.0004007 Eth
$91,518,127.00
632,748.264 SOL
0.0056%
89
PointPay
BTC-USDT$1.00
0.0004006 Eth
$89,463,550.00
1,004.202 BTC
0.0000%
90
Bitget
DOGE-USDT$0.9997
0.0004006 Eth
$86,056,854.00
418,343,642.413 DOGE
3.7239%
91
Bybit
SUI-USDT$0.9989
0.0004003 Eth
$84,923,099.00
30,409,703.250 SUI
0.2707%
92
Bybit
DOGE-USDT$0.9989
0.0004003 Eth
$82,210,217.00
400,298,819.600 DOGE
3.5633%
93
BYDFi
ETH-USDT$0.9991
0.0003992 Eth
$79,473,438.00
31,774.963 ETH
0.0003%
94
DigiFinex
XRP-USDT$0.9997
0.0004006 Eth
$79,154,304.00
34,022,153.000 XRP
0.3028%
95
DigiFinex
DOGE-USDT$0.9997
0.0004006 Eth
$76,757,178.00
363,156,555.640 DOGE
3.2326%
96
Hibt
XRP-USDT$0.9992
0.0004006 Eth
$73,585,380.00
33,263,713.960 XRP
0.2961%
97
Bitget
SUI-USDT$0.9989
0.0004003 Eth
$71,171,223.00
25,501,238.560 SUI
0.2270%
98
Binance
UNI-USDT$0.9983
0.0004002 Eth
$71,019,361.00
8,833,327.550 UNI
0.0786%
99
BingX
BTC-USDT$0.9989
0.0004003 Eth
$70,649,814.00
793.251 BTC
0.0000%
100
Kraken
BTC-USDT$1.00
0.0004007 Eth
$54,135,446.00
610.433 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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