ETH Price: $3,857.12 (+0.25%)
Gas: 9.83 Gwei

Token

Tether USD (USDT)
 

Overview

Max Total Supply

76,928,104,353.364467 USDT

Holders

6,553,978 ( 0.016%)

Market

Price

$1.00 @ 0.000259 ETH (-0.13%)

Onchain Market Cap

$76,812,173,700.10

Circulating Supply Market Cap

$140,160,708,700.00

Other Info

Token Contract (WITH 6 Decimals)

Balance
5,870.15146 USDT

Value
$5,861.31 ( ~1.5196 Eth) [0.0000%]
0x0e724fa8291fae53d8f556bfc178377510f6d9fb
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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):$80,996,221,944.00
Market Capitalization:$140,160,708,700.00
Circulating Supply:140,253,672,849.00 USDT
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
Binance
BTC-USDT$0.9997
0.0002585 Eth
$1,676,245,554.00
16,358.417 BTC
0.0000%
2
CoinW
BTC-USDT$0.9988
0.0002581 Eth
$1,347,120,931.00
13,109.992 BTC
0.0000%
3
BVOX
BTC-USDT$0.9998
0.0002574 Eth
$1,296,056,781.00
12,651.146 BTC
0.0000%
4
Binance
FDUSD-USDT$0.9997
0.0002585 Eth
$1,110,149,054.00
1,110,318,636.000 FDUSD
0.3250%
5
Ourbit
BTC-USDT$0.9997
0.0002581 Eth
$991,279,152.00
9,674.426 BTC
0.0000%
6
Toobit
BTC-USDT$0.9996
0.0002567 Eth
$945,882,155.00
9,223.285 BTC
0.0000%
7
AscendEX (BitMax)
BTC-USDT$0.9996
0.0002585 Eth
$943,663,349.00
9,181.705 BTC
0.0000%
8
Binance
ETH-USDT$0.9999
0.0002577 Eth
$780,824,388.00
201,164.508 ETH
0.0001%
9
DigiFinex
BTC-USDT$0.9997
0.0002585 Eth
$705,926,488.00
6,866.203 BTC
0.0000%
10
OrangeX
ETH-USDT$0.9997
0.0002581 Eth
$682,242,636.00
175,666.835 ETH
0.0001%
11
Tapbit
ETH-USDT$0.9987
0.0002582 Eth
$621,087,001.00
160,159.352 ETH
0.0000%
12
WhiteBIT
BTC-USDT$0.9997
0.0002579 Eth
$550,590,400.00
5,346.881 BTC
0.0000%
13
Binance
XRP-USDT$0.9987
0.0002582 Eth
$543,216,394.00
225,301,562.000 XRP
0.0659%
14
Toobit
ETH-USDT$0.9998
0.0002579 Eth
$533,640,645.00
137,472.871 ETH
0.0000%
15
AscendEX (BitMax)
ETH-USDT$0.9996
0.0002585 Eth
$509,534,386.00
131,980.330 ETH
0.0000%
16
OKX
BTC-USDT$0.9997
0.0002585 Eth
$483,054,456.00
4,714.969 BTC
0.0000%
17
MEXC
BTC-USDT$0.9998
0.0002585 Eth
$467,307,325.00
4,543.982 BTC
0.0000%
18
Binance
DOGE-USDT$0.9997
0.0002585 Eth
$414,472,089.00
1,039,087,430.000 DOGE
0.3042%
19
BitMart
BTC-USDT$0.9997
0.0002581 Eth
$389,014,647.00
3,775.264 BTC
0.0000%
20
XT.COM
BTC-USDT$0.9995
0.0002561 Eth
$377,507,183.00
3,687.306 BTC
0.0000%
21
Bitunix
BTC-USDT$0.9997
0.0002579 Eth
$375,876,591.00
3,650.059 BTC
0.0000%
22
BVOX
ETH-USDT$0.9997
0.0002574 Eth
$366,023,748.00
94,313.533 ETH
0.0000%
23
Hotcoin
BTC-USDT$0.9997
0.0002581 Eth
$365,495,658.00
3,552.875 BTC
0.0000%
24
LBank
BTC-USDT$0.9996
0.0002567 Eth
$336,220,201.00
3,260.874 BTC
0.0000%
25
Deepcoin
ETH-USDT$0.9997
0.0002574 Eth
$317,251,488.00
82,920.885 ETH
0.0000%
26
P2B
ETH-USDT$0.9997
0.0002567 Eth
$309,144,427.00
79,426.682 ETH
0.0000%
27
MEXC
ETH-USDT$0.9998
0.0002585 Eth
$302,593,463.00
78,299.479 ETH
0.0000%
28
CoinW
ETH-USDT$0.9996
0.0002567 Eth
$301,781,182.00
77,581.438 ETH
0.0000%
29
Ourbit
ETH-USDT$0.9998
0.0002585 Eth
$278,097,609.00
71,633.919 ETH
0.0000%
30
KuCoin
XRP-USDT$0.9987
0.0002582 Eth
$249,036,144.00
103,968,654.976 XRP
0.0304%
31
Binance
SUI-USDT$0.9999
0.0002574 Eth
$228,867,112.00
50,264,782.600 SUI
0.0147%
32
BitMart
ETH-USDT$0.9997
0.0002581 Eth
$225,139,951.00
58,126.168 ETH
0.0000%
33
Gate.io
BTC-USDT$0.9997
0.0002585 Eth
$218,755,653.00
2,134.321 BTC
0.0000%
34
HTX
BTC-USDT$0.9997
0.0002585 Eth
$210,295,427.00
2,051.120 BTC
0.0000%
35
Tapbit
BTC-USDT$0.9996
0.0002585 Eth
$207,023,210.00
2,020.479 BTC
0.0000%
36
BTSE
BTC-USDT$0.9997
0.0002581 Eth
$202,289,364.00
1,966.503 BTC
0.0000%
37
Coinbase Exchange
USDT-USD$0.9997
0.0002585 Eth
$199,993,181.00
200,045,192.910 USDT
0.0586%
38
Biconomy.com
BTC-USDT$0.9994
0.0002578 Eth
$198,375,640.00
1,938.314 BTC
0.0000%
39
BigONE
BTC-USDT$0.9988
0.0002581 Eth
$192,475,562.00
1,873.060 BTC
0.0000%
40
Binance
LINK-USDT$0.9997
0.0002585 Eth
$186,808,440.00
6,432,752.950 LINK
0.0019%
41
LATOKEN
BTC-USDT$0.9997
0.0002581 Eth
$174,850,531.00
1,700.045 BTC
0.0000%
42
Binance
BNB-USDT$0.9997
0.0002585 Eth
$172,385,471.00
241,351.820 BNB
0.0001%
43
Bitunix
ETH-USDT$0.9997
0.0002579 Eth
$154,681,325.00
39,910.844 ETH
0.0000%
44
LBank
ETH-USDT$0.9997
0.0002569 Eth
$148,429,027.00
38,288.956 ETH
0.0000%
45
KuCoin
BTC-USDT$0.9987
0.0002582 Eth
$143,953,330.00
1,400.890 BTC
0.0000%
46
Bybit
SOL-USDT$0.9997
0.0002585 Eth
$138,479,251.00
630,382.477 SOL
0.0002%
47
LBank
SOL-USDT$0.9987
0.0002582 Eth
$138,072,242.00
631,720.697 SOL
0.0002%
48
Binance
COW-USDT$0.9994
0.0002577 Eth
$136,634,792.00
162,244,569.200 COW
0.0475%
49
Binance
ADA-USDT$0.9997
0.0002585 Eth
$122,689,219.00
114,202,567.500 ADA
0.0334%
50
Hotcoin
ETH-USDT$0.9997
0.0002581 Eth
$121,446,884.00
31,366.762 ETH
0.0000%
51
Bitget
XRP-USDT$0.9997
0.0002585 Eth
$120,180,421.00
49,786,943.084 XRP
0.0146%
52
Gate.io
ETH-USDT$0.9997
0.0002585 Eth
$119,864,405.00
30,902.653 ETH
0.0000%
53
Bybit
XRP-USDT$0.9997
0.0002585 Eth
$119,752,946.00
49,614,997.210 XRP
0.0145%
54
Bitget
DOGE-USDT$0.9997
0.0002585 Eth
$119,221,285.00
298,448,538.947 DOGE
0.0874%
55
WhiteBIT
SOL-USDT$0.9997
0.0002567 Eth
$117,273,169.00
531,967.227 SOL
0.0002%
56
Biconomy.com
ETH-USDT$0.9987
0.0002582 Eth
$117,194,942.00
30,226.695 ETH
0.0000%
57
KuCoin
ETH-USDT$0.9987
0.0002582 Eth
$115,625,014.00
29,947.751 ETH
0.0000%
58
WhiteBIT
XRP-USDT$0.9994
0.0002578 Eth
$114,351,789.00
47,651,554.250 XRP
0.0139%
59
Binance
AAVE-USDT$0.9997
0.0002574 Eth
$110,506,538.00
300,522.504 AAVE
0.0001%
60
BTSE
ETH-USDT$0.9998
0.0002574 Eth
$110,203,444.00
28,404.113 ETH
0.0000%
61
LATOKEN
ETH-USDT$0.9998
0.0002574 Eth
$109,816,841.00
28,283.823 ETH
0.0000%
62
Binance
FTM-USDT$0.9987
0.0002582 Eth
$108,820,147.00
83,304,788.000 FTM
0.0244%
63
Binance
ACT-USDT$0.9997
0.0002581 Eth
$104,726,655.00
190,188,974.600 ACT
0.0557%
64
Gate.io
ENA-USDT$0.9987
0.0002582 Eth
$98,455,839.00
86,068,240.540 ENA
0.0252%
65
Binance
DOT-USDT$0.9997
0.0002585 Eth
$98,274,502.00
11,145,323.540 DOT
0.0033%
66
LBank
DOGE-USDT$0.9995
0.0002580 Eth
$93,395,305.00
233,473,980.000 DOGE
0.0683%
67
Gate.io
XRP-USDT$0.9997
0.0002585 Eth
$88,623,748.00
36,742,958.150 XRP
0.0108%
68
OKX
XRP-USDT$0.9997
0.0002585 Eth
$88,297,842.00
36,572,733.894 XRP
0.0107%
69
Binance
HBAR-USDT$0.9997
0.0002585 Eth
$86,084,988.00
295,591,165.000 HBAR
0.0865%
70
Kraken
USDT-USD$0.9998
0.0002585 Eth
$84,266,041.00
84,285,426.883 USDT
0.0247%
71
Binance
PNUT-USDT$0.9997
0.0002581 Eth
$83,795,444.00
73,124,916.200 PNUT
0.0214%
72
MEXC
DOGE-USDT$0.9998
0.0002585 Eth
$78,331,877.00
196,044,194.260 DOGE
0.0574%
73
Bybit
DOGE-USDT$0.9997
0.0002585 Eth
$77,564,511.00
194,165,295.700 DOGE
0.0568%
74
CoinW
DOGE-USDT$0.9998
0.0002580 Eth
$75,189,532.00
187,761,689.215 DOGE
0.0550%
75
Gate.io
FLOKI-USDT$0.9997
0.0002585 Eth
$71,920,102.00
302,440,871,756.000 FLOKI
88.5276%
76
MEXC
MX-USDT$0.9998
0.0002585 Eth
$71,448,636.00
19,811,520.890 MX
0.0058%
77
Gate.io
SUI-USDT$0.9997
0.0002585 Eth
$70,939,150.00
15,636,882.120 SUI
0.0046%
78
BYDFi
BTC-USDT$0.9995
0.0002580 Eth
$68,883,242.00
669.809 BTC
0.0000%
79
HTX
DOGE-USDT$0.9997
0.0002585 Eth
$66,263,775.00
166,111,645.803 DOGE
0.0486%
80
Binance
LTC-USDT$0.9997
0.0002585 Eth
$66,225,220.00
561,024.578 LTC
0.0002%
81
Dex-Trade
BTC-USDT$0.9996
0.0002574 Eth
$64,030,796.00
620.872 BTC
0.0000%
82
Gate.io
DOGE-USDT$0.9997
0.0002585 Eth
$63,021,137.00
157,962,337.540 DOGE
0.0462%
83
Binance
AVA-USDT$0.9997
0.0002585 Eth
$60,220,793.00
29,285,456.600 AVA
0.0086%
84
Gate.io
ONDO-USDT$0.9987
0.0002582 Eth
$60,163,886.00
32,226,842.580 ONDO
0.0094%
85
WhiteBIT
ENA-USDT$0.9987
0.0002582 Eth
$59,289,402.00
51,239,964.720 ENA
0.0150%
86
Bitget
SUI-USDT$0.9997
0.0002585 Eth
$56,427,461.00
12,369,337.080 SUI
0.0036%
87
Binance
ARB-USDT$0.9997
0.0002579 Eth
$55,039,713.00
55,560,752.400 ARB
0.0163%
88
LBank
XRP-USDT$0.9996
0.0002567 Eth
$54,440,575.00
22,605,123.520 XRP
0.0066%
89
Binance
NEIRO-USDT$0.9987
0.0002582 Eth
$53,504,217.00
33,262,109,423.000 NEIRO
9.7362%
90
Bitunix
XRP-USDT$0.9997
0.0002579 Eth
$51,908,756.00
21,619,353.000 XRP
0.0063%
91
HTX
ETH-USDT$0.9996
0.0002585 Eth
$50,274,364.00
12,956.176 ETH
0.0000%
92
Bitunix
DOGE-USDT$0.9997
0.0002579 Eth
$49,366,719.00
123,054,288.000 DOGE
0.0360%
93
CoinEx
BTC-USDT$0.9997
0.0002581 Eth
$48,174,589.00
470.115 BTC
0.0000%
94
KuCoin
SOL-USDT$0.9987
0.0002582 Eth
$46,291,047.00
211,798.885 SOL
0.0001%
95
MEXC
SOL-USDT$0.9998
0.0002585 Eth
$44,725,159.00
204,377.040 SOL
0.0001%
96
Ourbit
XRP-USDT$0.9996
0.0002585 Eth
$44,397,006.00
18,398,330.060 XRP
0.0054%
97
BingX
ETH-USDT$0.9997
0.0002585 Eth
$39,601,545.00
10,205.012 ETH
0.0000%
98
CoinW
SOL-USDT$0.9996
0.0002567 Eth
$38,641,853.00
175,385.440 SOL
0.0001%
99
Bybit
APEX-USDT$0.9997
0.0002585 Eth
$36,908,691.00
19,399,784.190 APEX
0.0057%
100
Azbit
XRP-USDT$0.9994
0.0002578 Eth
$36,362,163.00
15,071,853.640 XRP
0.0044%

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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