ETH Price: $2,542.23 (+3.49%)

Token

Tether USD (USDT)
 

Overview

Max Total Supply

54,980,740,580.616122 USDT

Holders

6,140,480 ( 0.004%)

Market

Price

$1.00 @ 0.000393 ETH (+0.01%)

Onchain Market Cap

$54,980,740,580.62

Circulating Supply Market Cap

$119,191,675,288.00

Other Info

Token Contract (WITH 6 Decimals)

Balance
0.285597 USDT

Value
$0.29 ( ~0.000114073001014598 Eth) [0.0000%]
0x905b30468c7a519c582cdde46f6ba79eaa1dc052
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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):$44,578,199,217.00
Market Capitalization:$119,191,675,288.00
Circulating Supply:119,166,241,914.00 USDT
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
Binance
BTC-USDT$1.00
0.0003932 Eth
$1,558,608,524.00
24,625.928 BTC
0.0000%
2
Bybit
BTC-USDT$1.00
0.0003932 Eth
$1,509,059,650.00
23,861.673 BTC
0.0000%
3
Pionex
BTC-USDT$1.00
0.0003933 Eth
$1,034,974,265.00
16,346.626 BTC
0.0000%
4
MEXC
BTC-USDT$1.00
0.0003933 Eth
$965,142,188.00
15,323.347 BTC
0.0000%
5
Binance
ETH-USDT$1.00
0.0003934 Eth
$905,786,047.00
355,974.895 ETH
0.0000%
6
CoinW
BTC-USDT$1.00
0.0003932 Eth
$801,001,347.00
12,724.389 BTC
0.0000%
7
Binance
USDC-USDT$1.00
0.0003933 Eth
$732,657,786.00
732,717,950.000 USDC
0.0064%
8
Tapbit
ETH-USDT$1.00
0.0003932 Eth
$689,195,892.00
270,781.944 ETH
0.0000%
9
Binance
SOL-USDT$1.00
0.0003933 Eth
$671,932,191.00
4,533,775.160 SOL
0.0000%
10
Binance
FDUSD-USDT$1.00
0.0003932 Eth
$666,485,955.00
666,712,219.000 FDUSD
0.0059%
11
OKX
BTC-USDT$1.00
0.0003932 Eth
$553,701,103.00
8,747.822 BTC
0.0000%
12
Bybit
ETH-USDT$1.00
0.0003932 Eth
$493,741,291.00
194,146.099 ETH
0.0000%
13
FameEX
BTC-USDT$1.00
0.0003932 Eth
$463,449,091.00
7,315.741 BTC
0.0000%
14
Pionex
ETH-USDT$1.00
0.0003933 Eth
$451,889,974.00
177,578.816 ETH
0.0000%
15
LATOKEN
BTC-USDT$1.00
0.0003934 Eth
$361,894,564.00
5,744.937 BTC
0.0000%
16
OKX
ETH-USDT$1.00
0.0003932 Eth
$344,289,994.00
135,385.346 ETH
0.0000%
17
BitMart
ETH-USDT$0.9997
0.0003933 Eth
$265,130,729.00
104,229.744 ETH
0.0000%
18
MEXC
ETH-USDT$1.00
0.0003933 Eth
$260,291,471.00
102,368.468 ETH
0.0000%
19
Gate.io
BTC-USDT$1.00
0.0003932 Eth
$187,704,109.00
2,965.687 BTC
0.0000%
20
BigONE
BTC-USDT$1.00
0.0003933 Eth
$184,937,614.00
2,937.593 BTC
0.0000%
21
Fastex
ETH-USDT$1.00
0.0003935 Eth
$169,502,360.00
66,663.297 ETH
0.0000%
22
Coinbase Exchange
USDT-USD$1.00
0.0003932 Eth
$166,959,694.00
166,954,685.260 USDT
0.0015%
23
WhiteBIT
SOL-USDT$1.00
0.0003933 Eth
$159,350,424.00
1,092,285.153 SOL
0.0000%
24
Gate.io
ETH-USDT$1.00
0.0003932 Eth
$153,450,208.00
60,341.046 ETH
0.0000%
25
Binance
BNB-USDT$1.00
0.0003936 Eth
$135,891,108.00
238,268.617 BNB
0.0000%
26
OKX
SOL-USDT$1.00
0.0003932 Eth
$134,923,265.00
909,641.022 SOL
0.0000%
27
Kraken
USDT-USD$1.00
0.0003934 Eth
$121,294,235.00
121,288,170.643 USDT
0.0011%
28
HTX
ETH-USDT$1.00
0.0003932 Eth
$106,165,666.00
41,742.896 ETH
0.0000%
29
Bybit
USDC-USDT$1.00
0.0003932 Eth
$100,817,004.00
100,826,383.420 USDC
0.0009%
30
WhiteBIT
NEAR-USDT$1.00
0.0003933 Eth
$87,216,468.00
20,055,441.300 NEAR
0.0002%
31
Bitget
SOL-USDT$0.9997
0.0003933 Eth
$73,664,283.00
498,167.984 SOL
0.0000%
32
Gate.io
SOL-USDT$1.00
0.0003932 Eth
$59,705,020.00
402,710.897 SOL
0.0000%
33
WhiteBIT
DOGE-USDT$1.00
0.0003933 Eth
$59,559,409.00
569,012,348.000 DOGE
0.0050%
34
WhiteBIT
XRP-USDT$0.9997
0.0003933 Eth
$48,831,009.00
83,786,597.200 XRP
0.0007%
35
Gate.io
PEPE-USDT$0.9997
0.0003933 Eth
$46,518,222.00
5,651,597,541,658.500 PEPE
49.6614%
36
Bitget
PEPE-USDT$0.9997
0.0003933 Eth
$43,983,398.00
5,364,975,681,343.000 PEPE
47.1428%
37
Pionex
SOL-USDT$1.00
0.0003933 Eth
$42,618,011.00
287,585.510 SOL
0.0000%
38
DigiFinex
SUI-USDT$1.00
0.0003932 Eth
$42,279,783.00
28,687,229.100 SUI
0.0003%
39
C-Patex
BTC-USDT$1.00
0.0003932 Eth
$38,068,532.00
604.745 BTC
0.0000%
40
P2B
BNB-USDT$1.00
0.0003931 Eth
$36,661,275.00
64,439.220 BNB
0.0000%
41
DigiFinex
USDC-USDT$1.00
0.0003932 Eth
$32,183,128.00
32,189,151.000 USDC
0.0003%
42
Bitunix
SOL-USDT$1.00
0.0003933 Eth
$29,912,128.00
205,033.470 SOL
0.0000%
43
PointPay
BTC-USDT$1.00
0.0003933 Eth
$27,372,064.00
432.367 BTC
0.0000%
44
Gate.io
SUI-USDT$0.9997
0.0003933 Eth
$22,589,662.00
15,172,810.279 SUI
0.0001%
45
OKX
USDC-USDT$1.00
0.0003932 Eth
$21,665,857.00
21,667,845.693 USDC
0.0002%
46
BVOX
BNB-USDT$1.00
0.0003933 Eth
$19,798,490.00
34,737.930 BNB
0.0000%
47
Gate.io
FTM-USDT$1.00
0.0003932 Eth
$16,712,788.00
25,758,294.300 FTM
0.0002%
48
Kraken
BTC-USDT$1.00
0.0003932 Eth
$16,559,046.00
262.903 BTC
0.0000%
49
Gate.io
JUP-USDT$1.00
0.0003931 Eth
$15,054,723.00
17,575,262.590 JUP
0.0002%
50
WhiteBIT
DOT-USDT$1.00
0.0003933 Eth
$14,399,584.00
3,328,716.476 DOT
0.0000%
51
Gate.io
DOGE-USDT$1.00
0.0003932 Eth
$14,223,538.00
134,737,970.310 DOGE
0.0012%
52
Gate.io
APT-USDT$1.00
0.0003932 Eth
$13,973,243.00
1,936,651.810 APT
0.0000%
53
FMFW.io
BTC-USDT$1.00
0.0003933 Eth
$12,282,148.00
195.210 BTC
0.0000%
54
Gate.io
PEOPLE-USDT$1.00
0.0003932 Eth
$12,197,296.00
189,275,784.046 PEOPLE
0.0017%
55
Gate.io
NEAR-USDT$1.00
0.0003932 Eth
$11,811,988.00
2,679,404.630 NEAR
0.0000%
56
Toobit
XRP-USDT$1.00
0.0003931 Eth
$11,463,673.00
19,598,937.000 XRP
0.0002%
57
Bitfinex
BTC-USDT$0.9996
0.0003932 Eth
$11,459,070.00
181.981 BTC
0.0000%
58
Bitunix
USDC-USDT$1.00
0.0003933 Eth
$11,391,339.00
11,391,775.007 USDC
0.0001%
59
Gate.io
ICP-USDT$0.9997
0.0003933 Eth
$11,259,773.00
1,341,503.640 ICP
0.0000%
60
Azbit
SOL-USDT$1.00
0.0003932 Eth
$11,137,302.00
74,894.160 SOL
0.0000%
61
FMFW.io
ETH-USDT$1.00
0.0003933 Eth
$10,098,985.00
3,969.986 ETH
0.0000%
62
OrangeX
SOL-USDT$1.00
0.0003935 Eth
$9,687,144.00
65,371.950 SOL
0.0000%
63
Gate.io
ZRO-USDT$0.9999
0.0003931 Eth
$9,505,543.00
2,146,830.040 ZRO
0.0000%
64
Gate.io
BNB-USDT$1.00
0.0003932 Eth
$8,621,932.00
15,113.091 BNB
0.0000%
65
Gate.io
AVAX-USDT$1.00
0.0003932 Eth
$6,668,096.00
239,405.922 AVAX
0.0000%
66
OrangeX
XRP-USDT$1.00
0.0003935 Eth
$6,393,631.00
10,933,918.000 XRP
0.0001%
67
MEXC
USDC-USDT$1.00
0.0003933 Eth
$6,132,445.00
6,132,620.040 USDC
0.0001%
68
WOO X
SOL-USDT$0.9997
0.0003933 Eth
$6,127,838.00
42,059.920 SOL
0.0000%
69
Gate.io
TON-USDT$1.00
0.0003932 Eth
$6,091,516.00
1,074,498.375 TON
0.0000%
70
Toobit
NEAR-USDT$1.00
0.0003932 Eth
$6,032,205.00
1,368,115.900 NEAR
0.0000%
71
WOO X
BTC-USDT$0.9997
0.0003933 Eth
$6,023,633.00
95.693 BTC
0.0000%
72
Bitget
USDC-USDT$0.9997
0.0003933 Eth
$5,933,670.00
5,936,178.749 USDC
0.0001%
73
LBank
BNB-USDT$1.00
0.0003934 Eth
$5,820,946.00
10,229.080 BNB
0.0000%
74
Gate.io
ETC-USDT$1.00
0.0003932 Eth
$5,275,430.00
277,675.280 ETC
0.0000%
75
DigiFinex
XRP-USDT$1.00
0.0003932 Eth
$4,887,508.00
8,383,412.000 XRP
0.0001%
76
Gate.io
BCH-USDT$1.00
0.0003932 Eth
$4,762,237.00
14,084.746 BCH
0.0000%
77
Gate.io
FLOW-USDT$1.00
0.0003932 Eth
$4,700,294.00
8,105,797.930 FLOW
0.0001%
78
Gate.io
XRP-USDT$1.00
0.0003932 Eth
$4,607,759.00
7,873,087.965 XRP
0.0001%
79
Gate.io
ENS-USDT$1.00
0.0003932 Eth
$4,576,911.00
245,750.600 ENS
0.0000%
80
WEEX
BNB-USDT$1.00
0.0003933 Eth
$4,426,253.00
7,765.831 BNB
0.0000%
81
Gate.io
FIL-USDT$1.00
0.0003932 Eth
$4,360,568.00
1,157,481.948 FIL
0.0000%
82
Gate.io
ASTR-USDT$1.00
0.0003932 Eth
$4,194,696.00
63,754,462.760 ASTR
0.0006%
83
Fastex
FTN-USDT$1.00
0.0003935 Eth
$3,786,031.00
1,656,661.101 FTN
0.0000%
84
Gate.io
ARB-USDT$0.9997
0.0003933 Eth
$3,606,312.00
6,255,067.870 ARB
0.0001%
85
OKX
STETH-USDT$1.00
0.0003932 Eth
$3,544,206.00
1,392.621 STETH
0.0000%
86
Gate.io
USDC-USDT$0.9997
0.0003933 Eth
$3,440,805.00
3,442,158.930 USDC
0.0000%
87
Tapbit
BNB-USDT$1.00
0.0003932 Eth
$3,345,799.00
5,867.047 BNB
0.0000%
88
OrangeX
TRX-USDT$1.00
0.0003935 Eth
$3,129,533.00
20,574,877.400 TRX
0.0002%
89
DigiFinex
AAVE-USDT$1.00
0.0003932 Eth
$3,108,040.00
20,447.099 AAVE
0.0000%
90
Gate.io
DOT-USDT$1.00
0.0003932 Eth
$2,993,743.00
692,986.710 DOT
0.0000%
91
Pionex
PEPE-USDT$1.00
0.0003933 Eth
$2,960,100.00
360,516,531,110.000 PEPE
3.1679%
92
Gate.io
LQTY-USDT$0.9997
0.0003933 Eth
$2,790,939.00
2,797,945.060 LQTY
0.0000%
93
WOO X
ETH-USDT$0.9997
0.0003933 Eth
$2,512,869.00
988.445 ETH
0.0000%
94
Gate.io
LINK-USDT$1.00
0.0003932 Eth
$2,296,694.00
199,286.810 LINK
0.0000%
95
Gate.io
LTC-USDT$1.00
0.0003932 Eth
$2,272,977.00
34,666.890 LTC
0.0000%
96
Bybit
USDE-USDT$0.9997
0.0003933 Eth
$2,199,714.00
2,203,445.320 USDE
0.0000%
97
Gate.io
ADA-USDT$1.00
0.0003932 Eth
$1,389,228.00
3,905,499.334 ADA
0.0000%
98
Gate.io
HBAR-USDT$1.00
0.0003932 Eth
$1,274,310.00
24,248,264.680 HBAR
0.0002%
99
Gate.io
TRX-USDT$1.00
0.0003932 Eth
$1,123,915.00
7,389,098.180 TRX
0.0001%
100
TokoCrypto
SOL-USDT$1.00
0.0003931 Eth
$708,912.00
4,864.959 SOL
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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