ETH Price: $3,490.32 (+5.44%)

Token

Tether USD (USDT)
 

Overview

Max Total Supply

69,929,452,093.657795 USDT

Holders

6,424,400 ( 0.012%)

Market

Price

$1.00 @ 0.000287 ETH (+0.08%)

Onchain Market Cap

$69,999,381,545.75

Circulating Supply Market Cap

$132,815,493,822.00

Other Info

Token Contract (WITH 6 Decimals)

Balance
0.018191 USDT

Value
$0.02 ( ~5.73013284420391E-06 Eth) [0.0000%]
0x51d0682b4e29d49df2f415a85c382899a58c09f1
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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):$131,579,583,276.00
Market Capitalization:$132,815,493,822.00
Circulating Supply:132,672,505,105.00 USDT
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
Binance
BTC-USDT$0.9999
0.0002874 Eth
$4,237,206,641.00
45,735.754 BTC
0.0001%
2
Pionex
BTC-USDT$0.9999
0.0002873 Eth
$3,579,443,127.00
38,625.260 BTC
0.0000%
3
Bybit
BTC-USDT$0.9999
0.0002873 Eth
$3,316,835,473.00
35,768.267 BTC
0.0000%
4
BVOX
BTC-USDT$1.00
0.0002875 Eth
$3,214,902,627.00
34,688.735 BTC
0.0000%
5
Ourbit
BTC-USDT$1.00
0.0002875 Eth
$2,556,949,328.00
27,590.654 BTC
0.0000%
6
WEEX
BTC-USDT$1.00
0.0002875 Eth
$2,359,918,742.00
25,482.959 BTC
0.0000%
7
Toobit
BTC-USDT$1.001
0.0002879 Eth
$2,207,330,628.00
23,800.985 BTC
0.0000%
8
WhiteBIT
BTC-USDT$1.00
0.0002898 Eth
$2,186,570,453.00
23,491.199 BTC
0.0000%
9
Binance
ETH-USDT$0.9994
0.0002879 Eth
$2,155,516,566.00
641,568.380 ETH
0.0007%
10
OrangeX
BTC-USDT$1.001
0.0002879 Eth
$1,980,615,545.00
21,361.189 BTC
0.0000%
11
Hotcoin
BTC-USDT$0.9999
0.0002873 Eth
$1,831,915,937.00
19,583.657 BTC
0.0000%
12
DigiFinex
BTC-USDT$1.00
0.0002874 Eth
$1,674,168,607.00
17,902.627 BTC
0.0000%
13
Pionex
ETH-USDT$1.00
0.0002874 Eth
$1,578,214,958.00
469,614.931 ETH
0.0005%
14
Tapbit
ETH-USDT$1.00
0.0002895 Eth
$1,567,186,725.00
466,203.634 ETH
0.0005%
15
Binance
USDC-USDT$1.00
0.0002874 Eth
$1,464,597,171.00
1,464,388,156.000 USDC
1.6250%
16
FameEX
ETH-USDT$1.00
0.0002874 Eth
$1,444,797,712.00
429,669.549 ETH
0.0005%
17
Toobit
ETH-USDT$1.001
0.0002896 Eth
$1,410,009,093.00
419,293.627 ETH
0.0005%
18
BitMart
BTC-USDT$1.00
0.0002874 Eth
$1,381,064,141.00
14,770.484 BTC
0.0000%
19
P2B
BTC-USDT$0.9999
0.0002881 Eth
$1,267,773,207.00
13,582.320 BTC
0.0000%
20
Binance
DOGE-USDT$1.00
0.0002875 Eth
$1,251,310,943.00
3,242,558,838.000 DOGE
3.5981%
21
Bitunix
BTC-USDT$0.9994
0.0002879 Eth
$1,152,593,168.00
12,371.872 BTC
0.0000%
22
Deepcoin
BTC-USDT$1.001
0.0002891 Eth
$1,073,573,027.00
12,141.869 BTC
0.0000%
23
CoinW
ETH-USDT$0.9992
0.0002874 Eth
$1,007,707,146.00
289,657.233 ETH
0.0003%
24
BVOX
ETH-USDT$1.00
0.0002875 Eth
$979,582,045.00
291,261.645 ETH
0.0003%
25
OKX
BTC-USDT$0.9999
0.0002874 Eth
$978,262,158.00
10,549.459 BTC
0.0000%
26
XT.COM
BTC-USDT$1.001
0.0002876 Eth
$959,618,209.00
10,349.646 BTC
0.0000%
27
AscendEX (BitMax)
BTC-USDT$1.00
0.0002874 Eth
$945,085,173.00
10,105.037 BTC
0.0000%
28
Binance
SOL-USDT$1.00
0.0002875 Eth
$936,578,317.00
4,055,349.983 SOL
0.0045%
29
WEEX
ETH-USDT$0.9993
0.0002879 Eth
$920,996,902.00
275,134.506 ETH
0.0003%
30
Binance
FDUSD-USDT$1.00
0.0002874 Eth
$896,122,864.00
898,273,030.000 FDUSD
0.9968%
31
BitMart
ETH-USDT$1.00
0.0002875 Eth
$865,447,825.00
248,416.965 ETH
0.0003%
32
Binance
XRP-USDT$1.001
0.0002891 Eth
$862,484,073.00
619,810,073.000 XRP
0.6878%
33
Bybit
ETH-USDT$0.9999
0.0002873 Eth
$808,223,920.00
240,655.861 ETH
0.0003%
34
DigiFinex
ETH-USDT$1.00
0.0002874 Eth
$771,886,129.00
221,703.754 ETH
0.0002%
35
LBank
BTC-USDT$1.00
0.0002874 Eth
$760,287,600.00
8,129.938 BTC
0.0000%
36
Ourbit
ETH-USDT$1.00
0.0002895 Eth
$684,808,199.00
203,741.882 ETH
0.0002%
37
Hotcoin
ETH-USDT$0.9992
0.0002874 Eth
$669,410,675.00
192,411.134 ETH
0.0002%
38
MEXC
BTC-USDT$0.9992
0.0002891 Eth
$627,931,957.00
6,741.237 BTC
0.0000%
39
HTX
BTC-USDT$0.9999
0.0002873 Eth
$618,920,589.00
6,673.391 BTC
0.0000%
40
XT.COM
ETH-USDT$1.00
0.0002898 Eth
$603,193,236.00
179,492.337 ETH
0.0002%
41
LATOKEN
BTC-USDT$1.001
0.0002876 Eth
$601,437,024.00
6,432.647 BTC
0.0000%
42
Binance
XLM-USDT$1.00
0.0002874 Eth
$592,264,223.00
1,275,419,075.000 XLM
1.4153%
43
WhiteBIT
ETH-USDT$0.9999
0.0002875 Eth
$574,894,518.00
165,129.972 ETH
0.0002%
44
AscendEX (BitMax)
ETH-USDT$1.00
0.0002874 Eth
$533,530,310.00
153,192.225 ETH
0.0002%
45
MEXC
ETH-USDT$1.001
0.0002876 Eth
$515,324,192.00
148,015.250 ETH
0.0002%
46
BigONE
BTC-USDT$0.9999
0.0002875 Eth
$511,165,657.00
5,469.383 BTC
0.0000%
47
OKX
ETH-USDT$1.001
0.0002876 Eth
$501,514,186.00
148,972.875 ETH
0.0002%
48
Bitunix
ETH-USDT$0.9994
0.0002879 Eth
$500,379,444.00
144,019.696 ETH
0.0002%
49
Tapbit
BTC-USDT$1.00
0.0002897 Eth
$489,328,421.00
5,278.980 BTC
0.0000%
50
OKX
DOGE-USDT$1.001
0.0002876 Eth
$472,061,772.00
1,223,851,237.846 DOGE
1.3581%
51
OrangeX
ETH-USDT$1.00
0.0002874 Eth
$446,911,355.00
132,784.537 ETH
0.0001%
52
Binance
BNB-USDT$1.00
0.0002894 Eth
$423,959,732.00
688,506.729 BNB
0.0008%
53
Binance
ADA-USDT$1.00
0.0002874 Eth
$382,345,173.00
400,290,026.100 ADA
0.4442%
54
Binance
SUI-USDT$0.9994
0.0002879 Eth
$380,790,626.00
112,751,334.800 SUI
0.1251%
55
BTSE
BTC-USDT$1.00
0.0002874 Eth
$367,802,152.00
3,932.050 BTC
0.0000%
56
Coinstore
BTC-USDT$1.001
0.0002876 Eth
$363,837,161.00
3,921.287 BTC
0.0000%
57
LBank
ETH-USDT$0.9999
0.0002897 Eth
$355,838,638.00
103,203.333 ETH
0.0001%
58
Biconomy.com
BTC-USDT$1.001
0.0002876 Eth
$352,083,923.00
3,795.585 BTC
0.0000%
59
LATOKEN
ETH-USDT$1.001
0.0002876 Eth
$340,985,877.00
98,055.807 ETH
0.0001%
60
Azbit
BTC-USDT$1.00
0.0002902 Eth
$322,100,109.00
3,483.075 BTC
0.0000%
61
Binance
FTM-USDT$1.00
0.0002886 Eth
$321,398,360.00
302,982,008.000 FTM
0.3362%
62
Bitget
XRP-USDT$1.00
0.0002874 Eth
$319,574,431.00
229,942,914.690 XRP
0.2552%
63
KuCoin
BTC-USDT$1.00
0.0002875 Eth
$310,535,321.00
3,319.173 BTC
0.0000%
64
Bybit
XRP-USDT$0.9999
0.0002873 Eth
$306,421,822.00
220,904,269.170 XRP
0.2451%
65
Hotcoin
DOGE-USDT$1.00
0.0002881 Eth
$289,056,689.00
741,741,538.326 DOGE
0.8231%
66
Bitget
BTC-USDT$1.00
0.0002874 Eth
$279,782,729.00
3,017.522 BTC
0.0000%
67
Bitget
DOGE-USDT$1.00
0.0002874 Eth
$257,024,217.00
666,402,356.344 DOGE
0.7395%
68
FameEX
DOGE-USDT$1.00
0.0002886 Eth
$251,774,472.00
652,721,362.501 DOGE
0.7243%
69
Gate.io
ETH-USDT$1.00
0.0002875 Eth
$241,636,049.00
72,053.668 ETH
0.0001%
70
Binance
PNUT-USDT$1.00
0.0002874 Eth
$239,297,297.00
222,236,084.100 PNUT
0.2466%
71
Bybit
USDC-USDT$0.9999
0.0002873 Eth
$239,101,437.00
239,081,653.240 USDC
0.2653%
72
Gate.io
BTC-USDT$1.00
0.0002875 Eth
$238,661,694.00
2,574.807 BTC
0.0000%
73
Coinstore
ETH-USDT$1.00
0.0002874 Eth
$229,414,800.00
68,079.001 ETH
0.0001%
74
Bybit
SOL-USDT$0.9999
0.0002873 Eth
$225,895,963.00
979,957.756 SOL
0.0011%
75
Binance
AVAX-USDT$1.00
0.0002886 Eth
$221,533,608.00
5,220,448.460 AVAX
0.0058%
76
Biconomy.com
ETH-USDT$1.001
0.0002876 Eth
$212,728,658.00
63,212.186 ETH
0.0001%
77
MEXC
DOGE-USDT$1.00
0.0002874 Eth
$208,238,163.00
533,078,003.900 DOGE
0.5915%
78
Binance
TIA-USDT$1.00
0.0002875 Eth
$201,554,328.00
24,759,474.390 TIA
0.0275%
79
Binance
SEI-USDT$1.00
0.0002874 Eth
$201,249,183.00
300,384,647.400 SEI
0.3333%
80
Bitunix
DOGE-USDT$0.9994
0.0002879 Eth
$185,603,266.00
477,510,122.000 DOGE
0.5299%
81
OKX
SOL-USDT$1.001
0.0002876 Eth
$182,984,785.00
791,854.460 SOL
0.0009%
82
HTX
DOGE-USDT$0.9999
0.0002873 Eth
$180,730,007.00
467,592,250.086 DOGE
0.5189%
83
Deepcoin
SOL-USDT$1.00
0.0002875 Eth
$178,361,785.00
794,431.257 SOL
0.0009%
84
KuCoin
ETH-USDT$1.00
0.0002875 Eth
$177,622,832.00
51,029.255 ETH
0.0001%
85
LBank
SOL-USDT$1.00
0.0002874 Eth
$175,405,906.00
747,667.755 SOL
0.0008%
86
Bybit
DOGE-USDT$0.9999
0.0002873 Eth
$174,332,228.00
452,334,983.600 DOGE
0.5019%
87
HTX
ETH-USDT$0.9999
0.0002873 Eth
$167,373,866.00
49,744.548 ETH
0.0001%
88
OKX
XRP-USDT$1.001
0.0002876 Eth
$164,900,088.00
118,258,853.507 XRP
0.1312%
89
Bitget
ETH-USDT$1.00
0.0002874 Eth
$160,044,247.00
47,674.025 ETH
0.0001%
90
Dex-Trade
BTC-USDT$1.00
0.0002875 Eth
$157,354,269.00
1,682.135 BTC
0.0000%
91
DigiFinex
DOGE-USDT$1.00
0.0002874 Eth
$156,540,770.00
400,230,229.890 DOGE
0.4441%
92
Binance
NEAR-USDT$1.00
0.0002874 Eth
$147,979,931.00
23,046,094.800 NEAR
0.0256%
93
WhiteBIT
ADA-USDT$1.00
0.0002896 Eth
$136,701,981.00
138,788,034.860 ADA
0.1540%
94
Binance
ARB-USDT$0.9994
0.0002879 Eth
$132,952,250.00
150,248,997.800 ARB
0.1667%
95
Binance
DOT-USDT$1.00
0.0002874 Eth
$132,903,041.00
16,425,673.880 DOT
0.0182%
96
Bybit
MNT-USDT$0.9999
0.0002874 Eth
$128,476,786.00
156,147,734.830 MNT
0.1733%
97
Deepcoin
DOGE-USDT$1.00
0.0002882 Eth
$126,992,080.00
341,021,116.668 DOGE
0.3784%
98
Binance
NEIRO-USDT$1.00
0.0002875 Eth
$124,092,124.00
73,459,788,661.000 NEIRO
81.5151%
99
WhiteBIT
TRX-USDT$0.9999
0.0002874 Eth
$105,034,761.00
525,268,839.180 TRX
0.5829%
100
BYDFi
BTC-USDT$1.00
0.0002889 Eth
$95,178,478.00
1,021.363 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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