ETH Price: $2,493.23 (-1.02%)

Token

Tether USD (USDT)
 

Overview

Max Total Supply

54,940,840,345.993792 USDT

Holders

6,282,627 ( -0.019%)

Market

Price

$1.00 @ 0.000401 ETH (-0.05%)

Onchain Market Cap

$54,914,743,446.83

Circulating Supply Market Cap

$120,528,122,970.00

Other Info

Token Contract (WITH 6 Decimals)

Balance
0 USDT

Value
$0.00
0x42f85f6dc06eb6fe7ef607ac850fe633ffae221f
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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):$33,163,748,341.00
Market Capitalization:$120,528,122,970.00
Circulating Supply:120,576,300,905.00 USDT
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
Binance
BTC-USDT$0.9998
0.0004008 Eth
$792,058,044.00
11,403.272 BTC
0.0000%
2
CoinW
BTC-USDT$0.9998
0.0004008 Eth
$768,764,811.00
11,057.851 BTC
0.0000%
3
Hotcoin
BTC-USDT$0.9998
0.0004008 Eth
$704,531,207.00
10,132.559 BTC
0.0000%
4
Bybit
BTC-USDT$0.9997
0.0004008 Eth
$637,012,500.00
9,172.924 BTC
0.0000%
5
WEEX
BTC-USDT$0.9998
0.0004011 Eth
$534,580,315.00
7,702.487 BTC
0.0000%
6
MEXC
BTC-USDT$0.9997
0.0004013 Eth
$499,302,133.00
7,184.100 BTC
0.0000%
7
Toobit
BTC-USDT$0.9998
0.0004012 Eth
$475,914,825.00
6,852.884 BTC
0.0000%
8
AscendEX (BitMax)
BTC-USDT$0.9998
0.0004008 Eth
$467,422,864.00
6,722.311 BTC
0.0000%
9
Binance
ETH-USDT$0.9998
0.0004013 Eth
$413,220,033.00
165,437.466 ETH
0.0000%
10
BVOX
ETH-USDT$0.9998
0.0004013 Eth
$392,171,873.00
156,833.459 ETH
0.0000%
11
LBank
BTC-USDT$0.9998
0.0004008 Eth
$350,515,245.00
5,040.739 BTC
0.0000%
12
Deepcoin
BTC-USDT$0.9999
0.0004008 Eth
$323,588,982.00
6,043.012 BTC
0.0000%
13
Tapbit
ETH-USDT$0.9997
0.0004008 Eth
$316,249,805.00
126,652.597 ETH
0.0000%
14
P2B
BTC-USDT$1.00
0.0004009 Eth
$301,577,264.00
4,336.912 BTC
0.0000%
15
WhiteBIT
BTC-USDT$0.9997
0.0004008 Eth
$286,229,516.00
4,117.328 BTC
0.0000%
16
Hotcoin
ETH-USDT$0.9997
0.0004008 Eth
$285,852,883.00
114,618.583 ETH
0.0000%
17
Toobit
ETH-USDT$0.9998
0.0004012 Eth
$273,749,165.00
109,580.555 ETH
0.0000%
18
Binance
SOL-USDT$0.9998
0.0004013 Eth
$267,491,815.00
1,620,035.530 SOL
0.0000%
19
WEEX
ETH-USDT$0.9999
0.0004008 Eth
$258,237,476.00
103,452.412 ETH
0.0000%
20
AscendEX (BitMax)
ETH-USDT$0.9998
0.0004008 Eth
$255,985,893.00
102,607.762 ETH
0.0000%
21
Binance
DOGE-USDT$0.9997
0.0004008 Eth
$223,747,417.00
1,403,589,283.000 DOGE
0.0224%
22
OKX
BTC-USDT$0.9998
0.0004008 Eth
$221,241,090.00
3,185.425 BTC
0.0000%
23
Bitget
BTC-USDT$0.9998
0.0004008 Eth
$204,103,031.00
2,936.010 BTC
0.0000%
24
FameEX
ETH-USDT$0.9998
0.0004013 Eth
$171,237,118.00
68,561.057 ETH
0.0000%
25
XT.COM
BTC-USDT$0.9999
0.0004013 Eth
$166,091,374.00
2,391.204 BTC
0.0000%
26
HTX
BTC-USDT$0.9998
0.0004008 Eth
$163,963,437.00
2,362.225 BTC
0.0000%
27
OrangeX
ETH-USDT$0.9998
0.0004008 Eth
$157,727,778.00
63,146.117 ETH
0.0000%
28
CoinW
ETH-USDT$0.9998
0.0004008 Eth
$156,959,165.00
62,921.182 ETH
0.0000%
29
Deepcoin
ETH-USDT$0.9999
0.0004008 Eth
$150,024,576.00
68,910.395 ETH
0.0000%
30
DigiFinex
ETH-USDT$0.9997
0.0004008 Eth
$142,417,861.00
57,101.976 ETH
0.0000%
31
Biconomy.com
BTC-USDT$0.9998
0.0004013 Eth
$132,658,901.00
1,909.312 BTC
0.0000%
32
BTSE
BTC-USDT$0.9998
0.0004011 Eth
$119,874,299.00
1,724.534 BTC
0.0000%
33
Coinbase Exchange
USDT-USD$0.9997
0.0004008 Eth
$116,194,703.00
116,226,084.080 USDT
0.0019%
34
XT.COM
ETH-USDT$0.9998
0.0004008 Eth
$115,550,186.00
46,265.880 ETH
0.0000%
35
Bitget
ETH-USDT$0.9998
0.0004008 Eth
$113,749,404.00
45,469.931 ETH
0.0000%
36
OKX
ETH-USDT$0.9998
0.0004008 Eth
$105,679,950.00
42,344.825 ETH
0.0000%
37
Binance
SUI-USDT$0.9999
0.0004013 Eth
$101,712,005.00
52,235,937.700 SUI
0.0008%
38
Binance
NEIRO-USDT$0.9998
0.0004013 Eth
$97,483,896.00
68,123,242,278.000 NEIRO
1.0849%
39
Tapbit
BTC-USDT$0.9999
0.0004008 Eth
$97,377,639.00
1,401.556 BTC
0.0000%
40
BigONE
BTC-USDT$0.9998
0.0004008 Eth
$94,959,618.00
1,365.708 BTC
0.0000%
41
Fastex
BTC-USDT$0.9999
0.0004010 Eth
$94,485,936.00
1,358.946 BTC
0.0000%
42
Biconomy.com
ETH-USDT$0.9998
0.0004013 Eth
$91,181,461.00
36,468.234 ETH
0.0000%
43
Coinstore
BTC-USDT$0.9998
0.0004013 Eth
$85,134,772.00
1,225.149 BTC
0.0000%
44
KuCoin
ETH-USDT$0.9998
0.0004008 Eth
$83,793,384.00
33,591.382 ETH
0.0000%
45
Deepcoin
UXLINK-USDT$0.9999
0.0004008 Eth
$83,494,445.00
155,100,023.286 UXLINK
0.0025%
46
LBank
SOL-USDT$0.9997
0.0004008 Eth
$78,210,426.00
472,155.924 SOL
0.0000%
47
Bybit
SOL-USDT$0.9997
0.0004008 Eth
$72,992,266.00
442,044.143 SOL
0.0000%
48
Binance
WIF-USDT$0.9999
0.0004013 Eth
$72,735,409.00
33,241,255.280 WIF
0.0005%
49
LATOKEN
BTC-USDT$0.9999
0.0004008 Eth
$72,442,214.00
1,041.806 BTC
0.0000%
50
Coinstore
ETH-USDT$0.9998
0.0004013 Eth
$71,987,958.00
28,799.650 ETH
0.0000%
51
Bitunix
ETH-USDT$0.9999
0.0004013 Eth
$69,226,860.00
27,762.659 ETH
0.0000%
52
Bitget
DOGE-USDT$0.9998
0.0004008 Eth
$68,886,309.00
432,138,806.977 DOGE
0.0069%
53
OKX
DOGE-USDT$0.9998
0.0004008 Eth
$68,794,897.00
431,873,719.736 DOGE
0.0069%
54
FameEX
SOL-USDT$0.9999
0.0004008 Eth
$68,680,341.00
415,838.134 SOL
0.0000%
55
OKX
SOL-USDT$0.9998
0.0004008 Eth
$62,308,325.00
376,951.447 SOL
0.0000%
56
Gate.io
ETH-USDT$0.9997
0.0004008 Eth
$57,646,285.00
23,113.795 ETH
0.0000%
57
DigiFinex
GRASS-USDT$0.9997
0.0004008 Eth
$57,096,225.00
34,088,372.230 GRASS
0.0005%
58
KuCoin
BTC-USDT$0.9998
0.0004008 Eth
$56,730,929.00
815.946 BTC
0.0000%
59
Hotcoin
DOGE-USDT$0.9997
0.0004008 Eth
$54,972,343.00
344,906,601.221 DOGE
0.0055%
60
Dex-Trade
BTC-USDT$0.9999
0.0004008 Eth
$52,748,448.00
758.530 BTC
0.0000%
61
Gate.io
BTC-USDT$0.9998
0.0004008 Eth
$52,176,784.00
751.490 BTC
0.0000%
62
WhiteBIT
SOL-USDT$0.9997
0.0004008 Eth
$48,140,215.00
290,681.517 SOL
0.0000%
63
HTX
DOGE-USDT$0.9997
0.0004008 Eth
$46,465,861.00
291,325,653.732 DOGE
0.0046%
64
BigONE
ETH-USDT$0.9999
0.0004008 Eth
$40,831,145.00
16,368.684 ETH
0.0000%
65
HTX
PEPE-USDT$0.9998
0.0004008 Eth
$40,476,680.00
4,575,906,801,834.960 PEPE
72.8769%
66
Binance
TIA-USDT$1.00
0.0004013 Eth
$39,748,998.00
8,665,701.300 TIA
0.0001%
67
BingX
BTC-USDT$0.9997
0.0004008 Eth
$39,114,494.00
562.989 BTC
0.0000%
68
Coinbase Exchange
USDT-USDC$0.9999
0.0004013 Eth
$37,787,611.00
37,793,120.800 USDT
0.0006%
69
FameEX
DOGE-USDT$0.9997
0.0004008 Eth
$34,232,308.00
214,771,495.887 DOGE
0.0034%
70
Gate.io
DOGE-USDT$0.9997
0.0004008 Eth
$31,837,547.00
200,380,940.024 DOGE
0.0032%
71
WhiteBIT
USDC-USDT$0.9997
0.0004008 Eth
$31,132,897.00
31,136,944.044 USDC
0.0005%
72
Binance
BOME-USDT$0.9998
0.0004013 Eth
$30,702,543.00
4,006,846,658.000 BOME
0.0638%
73
Azbit
TRX-USDT$0.9999
0.0004008 Eth
$28,668,069.00
171,841,090.100 TRX
0.0027%
74
Binance
RUNE-USDT$0.9997
0.0004008 Eth
$28,539,744.00
5,070,627.200 RUNE
0.0001%
75
CoinEx
BTC-USDT$0.9998
0.0004008 Eth
$27,441,610.00
394.940 BTC
0.0000%
76
OKX
SUI-USDT$0.9998
0.0004008 Eth
$27,062,117.00
13,880,159.220 SUI
0.0002%
77
CoinW
SOL-USDT$0.9997
0.0004008 Eth
$26,453,882.00
159,689.288 SOL
0.0000%
78
BTSE
DOGE-USDT$0.9999
0.0004008 Eth
$25,636,383.00
160,812,804.961 DOGE
0.0026%
79
Gate.io
SUI-USDT$0.9999
0.0004008 Eth
$25,157,291.00
12,945,096.930 SUI
0.0002%
80
Bitunix
SOL-USDT$0.9999
0.0004013 Eth
$24,594,558.00
148,665.340 SOL
0.0000%
81
Bitunix
DOGE-USDT$0.9999
0.0004013 Eth
$22,883,894.00
143,394,849.000 DOGE
0.0023%
82
DigiFinex
DOGE-USDT$0.9997
0.0004008 Eth
$22,467,908.00
140,946,462.020 DOGE
0.0022%
83
LBank
DOGE-USDT$0.9998
0.0004008 Eth
$22,189,508.00
139,153,523.000 DOGE
0.0022%
84
Slex
BTC-USDT$0.9999
0.0004013 Eth
$21,276,878.00
306.326 BTC
0.0000%
85
Binance
UNI-USDT$0.9997
0.0004008 Eth
$19,583,959.00
2,619,565.100 UNI
0.0000%
86
MEXC
SOL-USDT$0.9999
0.0004010 Eth
$18,921,079.00
114,321.100 SOL
0.0000%
87
WhiteBIT
TRX-USDT$0.9997
0.0004008 Eth
$18,705,810.00
112,552,603.640 TRX
0.0018%
88
BYDFi
BTC-USDT$0.9998
0.0004013 Eth
$18,591,361.00
267.501 BTC
0.0000%
89
Gate.io
SOL-USDT$0.9997
0.0004008 Eth
$18,591,270.00
112,477.906 SOL
0.0000%
90
KuCoin
SOL-USDT$0.9999
0.0004008 Eth
$18,415,681.00
111,132.084 SOL
0.0000%
91
WhiteBIT
LINK-USDT$0.9997
0.0004008 Eth
$18,134,451.00
1,613,013.670 LINK
0.0000%
92
HashKey Global
BTC-USDT$1.00
0.0004010 Eth
$17,909,838.00
257.462 BTC
0.0000%
93
Azbit
BTC-USDT$0.9999
0.0004008 Eth
$16,517,197.00
237.641 BTC
0.0000%
94
WhiteBIT
NEIRO-USDT$0.9997
0.0004008 Eth
$16,283,676.00
11,606,103,306.000 NEIRO
0.1848%
95
Bybit
ONDO-USDT$0.9997
0.0004008 Eth
$16,062,848.00
24,697,260.130 ONDO
0.0004%
96
Kraken
BTC-USDT$0.9997
0.0004008 Eth
$15,748,060.00
226.518 BTC
0.0000%
97
Gate.io
PEPE-USDT$0.9998
0.0004008 Eth
$14,129,024.00
1,614,452,707,094.000 PEPE
25.7121%
98
Binance
JUP-USDT$0.9999
0.0004008 Eth
$13,608,831.00
14,365,474.000 JUP
0.0002%
99
XT.COM
DOGE-USDT$0.9997
0.0004008 Eth
$13,475,357.00
84,531,442.000 DOGE
0.0013%
100
WhiteBIT
ADA-USDT$0.9997
0.0004008 Eth
$13,229,108.00
37,597,874.430 ADA
0.0006%

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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