ETH Price: $3,044.85 (+4.38%)

Token

Tether USD (USDT)
 

Overview

Max Total Supply

57,939,188,189.669465 USDT

Holders

6,290,417 ( -0.028%)

Market

Price

$1.00 @ 0.000329 ETH (-0.13%)

Onchain Market Cap

$57,997,127,377.86

Circulating Supply Market Cap

$123,107,052,092.00

Other Info

Token Contract (WITH 6 Decimals)

Balance
4.975138 USDT

Value
$4.98 ( ~0.00163555087017075 Eth) [0.0000%]
0x5f37a79ad601d8431858d38304e8f7fc2a459e35
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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):$80,465,596,544.00
Market Capitalization:$123,107,052,092.00
Circulating Supply:123,028,341,160.00 USDT
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
BVOX
BTC-USDT$1.001
0.0003305 Eth
$2,522,385,172.00
33,003.666 BTC
0.0000%
2
Binance
BTC-USDT$1.00
0.0003289 Eth
$2,428,453,670.00
31,781.909 BTC
0.0000%
3
CoinW
BTC-USDT$1.00
0.0003297 Eth
$1,953,899,886.00
25,521.466 BTC
0.0000%
4
Binance
ETH-USDT$1.00
0.0003290 Eth
$1,727,286,636.00
582,412.157 ETH
0.0000%
5
BVOX
ETH-USDT$1.00
0.0003296 Eth
$1,709,377,952.00
576,094.108 ETH
0.0000%
6
WEEX
BTC-USDT$1.001
0.0003300 Eth
$1,655,799,315.00
21,674.746 BTC
0.0000%
7
Bybit
BTC-USDT$1.00
0.0003289 Eth
$1,481,743,972.00
19,399.797 BTC
0.0000%
8
Toobit
BTC-USDT$1.00
0.0003305 Eth
$1,355,192,486.00
17,738.192 BTC
0.0000%
9
Pionex
BTC-USDT$1.001
0.0003292 Eth
$1,308,605,686.00
17,122.133 BTC
0.0000%
10
Ourbit
BTC-USDT$1.00
0.0003297 Eth
$1,298,953,309.00
17,001.888 BTC
0.0000%
11
Tapbit
ETH-USDT$1.00
0.0003293 Eth
$1,218,799,126.00
410,818.197 ETH
0.0000%
12
Coinbase Exchange
USDT-USD$1.00
0.0003289 Eth
$1,198,868,118.00
1,198,388,762.480 USDT
0.0024%
13
BitMart
BTC-USDT$1.00
0.0003290 Eth
$1,014,025,746.00
13,241.179 BTC
0.0000%
14
AscendEX (BitMax)
BTC-USDT$1.00
0.0003289 Eth
$939,144,558.00
12,262.967 BTC
0.0000%
15
Hotcoin
BTC-USDT$1.00
0.0003293 Eth
$925,858,223.00
12,086.125 BTC
0.0000%
16
Hotcoin
ETH-USDT$1.00
0.0003293 Eth
$864,949,820.00
284,086.461 ETH
0.0000%
17
P2B
BTC-USDT$1.00
0.0003297 Eth
$847,878,294.00
11,066.541 BTC
0.0000%
18
Binance
SOL-USDT$1.00
0.0003290 Eth
$836,520,224.00
4,164,423.561 SOL
0.0000%
19
DigiFinex
BTC-USDT$1.00
0.0003290 Eth
$830,314,684.00
10,846.339 BTC
0.0000%
20
WhiteBIT
BTC-USDT$1.00
0.0003296 Eth
$753,312,323.00
9,839.964 BTC
0.0000%
21
Bitunix
BTC-USDT$1.00
0.0003289 Eth
$693,384,661.00
9,055.165 BTC
0.0000%
22
Gate.io
ETH-USDT$1.00
0.0003289 Eth
$689,709,814.00
232,608.712 ETH
0.0000%
23
Binance
DOGE-USDT$1.00
0.0003290 Eth
$658,298,366.00
3,277,629,013.000 DOGE
0.0064%
24
DigiFinex
ETH-USDT$1.00
0.0003290 Eth
$619,787,880.00
203,626.147 ETH
0.0000%
25
OKX
BTC-USDT$1.00
0.0003289 Eth
$609,563,602.00
7,979.570 BTC
0.0000%
26
Bybit
ETH-USDT$1.00
0.0003289 Eth
$572,991,620.00
193,113.517 ETH
0.0000%
27
Deepcoin
BTC-USDT$1.00
0.0003296 Eth
$567,519,878.00
7,577.803 BTC
0.0000%
28
Pionex
ETH-USDT$1.001
0.0003292 Eth
$558,173,855.00
188,245.665 ETH
0.0000%
29
MEXC
BTC-USDT$1.00
0.0003294 Eth
$546,848,531.00
7,138.575 BTC
0.0000%
30
Binance
FDUSD-USDT$1.001
0.0003303 Eth
$530,354,388.00
530,391,929.000 FDUSD
0.0010%
31
AscendEX (BitMax)
ETH-USDT$1.00
0.0003289 Eth
$527,536,851.00
173,305.699 ETH
0.0000%
32
Bitunix
ETH-USDT$1.00
0.0003289 Eth
$514,764,747.00
169,223.840 ETH
0.0000%
33
XT.COM
BTC-USDT$1.00
0.0003289 Eth
$469,582,406.00
6,146.019 BTC
0.0000%
34
OrangeX
ETH-USDT$1.00
0.0003290 Eth
$450,539,604.00
152,018.461 ETH
0.0000%
35
Coinbase Exchange
USDT-USDC$1.00
0.0003293 Eth
$434,166,642.00
434,011,785.960 USDT
0.0009%
36
Binance
PEPE-USDT$1.00
0.0003290 Eth
$409,929,039.00
37,921,392,436,314.000 PEPE
74.6081%
37
LATOKEN
BTC-USDT$1.00
0.0003290 Eth
$370,581,460.00
4,841.404 BTC
0.0000%
38
Binance
NEIRO-USDT$1.00
0.0003296 Eth
$343,996,396.00
150,184,361,450.000 NEIRO
0.2955%
39
Tapbit
BTC-USDT$1.00
0.0003296 Eth
$295,181,091.00
3,863.740 BTC
0.0000%
40
Hotcoin
DOGE-USDT$1.00
0.0003297 Eth
$294,100,853.00
1,392,300,373.000 DOGE
0.0027%
41
KuCoin
ETH-USDT$1.00
0.0003290 Eth
$288,017,327.00
94,619.474 ETH
0.0000%
42
HTX
BTC-USDT$1.00
0.0003289 Eth
$258,141,398.00
3,379.224 BTC
0.0000%
43
Bitget
BTC-USDT$1.00
0.0003289 Eth
$253,088,834.00
3,313.532 BTC
0.0000%
44
Gate.io
BTC-USDT$1.00
0.0003289 Eth
$249,240,106.00
3,260.928 BTC
0.0000%
45
Biconomy.com
BTC-USDT$1.00
0.0003296 Eth
$238,344,271.00
3,120.716 BTC
0.0000%
46
Coinstore
ETH-USDT$1.001
0.0003292 Eth
$223,258,584.00
75,251.503 ETH
0.0000%
47
LBank
ETH-USDT$1.001
0.0003292 Eth
$213,279,768.00
69,963.384 ETH
0.0000%
48
FameEX
SOL-USDT$1.00
0.0003296 Eth
$212,873,002.00
1,060,021.232 SOL
0.0000%
49
Binance
WIF-USDT$1.00
0.0003289 Eth
$196,293,185.00
84,069,675.590 WIF
0.0002%
50
Gate.io
DOGE-USDT$1.00
0.0003290 Eth
$193,259,968.00
965,906,990.035 DOGE
0.0019%
51
Biconomy.com
ETH-USDT$1.001
0.0003292 Eth
$191,475,376.00
64,625.651 ETH
0.0000%
52
Bybit
SOL-USDT$1.00
0.0003289 Eth
$180,448,900.00
898,858.086 SOL
0.0000%
53
Binance
SUI-USDT$1.00
0.0003296 Eth
$177,274,085.00
77,714,101.000 SUI
0.0002%
54
KuCoin
BTC-USDT$1.00
0.0003290 Eth
$172,433,668.00
2,252.276 BTC
0.0000%
55
Coinstore
BTC-USDT$1.00
0.0003294 Eth
$162,966,133.00
2,132.985 BTC
0.0000%
56
Bitget
ETH-USDT$1.00
0.0003289 Eth
$151,680,674.00
51,266.368 ETH
0.0000%
57
Binance
ADA-USDT$1.001
0.0003299 Eth
$151,570,803.00
343,986,856.200 ADA
0.0007%
58
Binance
XRP-USDT$1.00
0.0003290 Eth
$149,771,404.00
271,737,281.000 XRP
0.0005%
59
Dex-Trade
BTC-USDT$1.00
0.0003293 Eth
$135,505,529.00
1,768.806 BTC
0.0000%
60
Binance
TROY-USDT$1.00
0.0003290 Eth
$135,068,246.00
26,465,651,361.000 TROY
0.0521%
61
FameEX
DOGE-USDT$1.001
0.0003300 Eth
$131,597,952.00
655,611,242.806 DOGE
0.0013%
62
Bitunix
DOGE-USDT$1.00
0.0003289 Eth
$112,353,825.00
534,127,171.000 DOGE
0.0011%
63
Binance
RAY-USDT$1.00
0.0003290 Eth
$108,765,788.00
20,963,816.400 RAY
0.0000%
64
Bybit
MNT-USDT$1.00
0.0003289 Eth
$108,425,726.00
160,393,062.250 MNT
0.0003%
65
Deepcoin
UXLINK-USDT$1.00
0.0003296 Eth
$102,569,585.00
154,800,023.264 UXLINK
0.0003%
66
Binance
ENA-USDT$1.00
0.0003290 Eth
$100,888,851.00
199,839,202.290 ENA
0.0004%
67
Bitget
SOL-USDT$1.00
0.0003289 Eth
$99,398,025.00
495,403.731 SOL
0.0000%
68
FameEX
BNB-USDT$1.00
0.0003301 Eth
$99,396,764.00
161,248.604 BNB
0.0000%
69
Bitget
DOGE-USDT$1.00
0.0003289 Eth
$96,162,424.00
481,841,520.502 DOGE
0.0009%
70
MEXC
ENA-USDT$1.00
0.0003289 Eth
$95,793,790.00
184,671,727.820 ENA
0.0004%
71
Bybit
XRP-USDT$1.00
0.0003289 Eth
$93,440,592.00
169,816,869.060 XRP
0.0003%
72
Gate.io
ENA-USDT$1.00
0.0003289 Eth
$87,404,134.00
173,056,438.333 ENA
0.0003%
73
DigiFinex
DOGE-USDT$1.00
0.0003290 Eth
$82,389,625.00
392,009,605.120 DOGE
0.0008%
74
HTX
ETH-USDT$1.00
0.0003289 Eth
$82,180,729.00
27,716.177 ETH
0.0000%
75
Gate.io
SOL-USDT$1.00
0.0003293 Eth
$80,401,071.00
401,092.668 SOL
0.0000%
76
Bybit
PEPE-USDT$1.00
0.0003289 Eth
$77,415,976.00
7,156,341,144,679.000 PEPE
14.0797%
77
Binance
PEOPLE-USDT$1.00
0.0003290 Eth
$76,232,124.00
1,276,574,732.500 PEOPLE
0.0025%
78
WhiteBIT
DOGE-USDT$1.00
0.0003296 Eth
$75,880,267.00
360,008,206.000 DOGE
0.0007%
79
Binance
BOME-USDT$1.00
0.0003290 Eth
$72,214,477.00
8,623,546,481.000 BOME
0.0170%
80
Bybit
APEX-USDT$1.00
0.0003289 Eth
$71,585,548.00
48,391,381.400 APEX
0.0001%
81
DigiFinex
GRASS-USDT$1.00
0.0003290 Eth
$71,069,518.00
22,930,007.434 GRASS
0.0000%
82
DigiFinex
SOL-USDT$1.00
0.0003290 Eth
$69,677,299.00
345,469.990 SOL
0.0000%
83
Binance
ARB-USDT$1.00
0.0003290 Eth
$68,460,606.00
115,887,291.000 ARB
0.0002%
84
Gate.io
PEOPLE-USDT$1.00
0.0003290 Eth
$67,594,588.00
1,141,149,999.643 PEOPLE
0.0022%
85
BVOX
DOGE-USDT$1.00
0.0003296 Eth
$66,352,359.00
331,844,820.000 DOGE
0.0007%
86
WhiteBIT
ADA-USDT$1.00
0.0003296 Eth
$64,256,187.00
146,755,721.260 ADA
0.0003%
87
WhiteBIT
LINK-USDT$1.00
0.0003296 Eth
$64,010,017.00
4,743,456.700 LINK
0.0000%
88
Binance
TIA-USDT$1.00
0.0003301 Eth
$63,961,564.00
12,121,150.990 TIA
0.0000%
89
Gate.io
PEPE-USDT$1.00
0.0003293 Eth
$59,706,225.00
5,548,583,429,185.700 PEPE
10.9165%
90
Toobit
DOGE-USDT$1.00
0.0003296 Eth
$58,307,949.00
290,412,547.000 DOGE
0.0006%
91
WEEX
DOGE-USDT$1.00
0.0003295 Eth
$57,555,582.00
287,914,385.308 DOGE
0.0006%
92
KuCoin
SOL-USDT$1.00
0.0003290 Eth
$56,566,551.00
280,460.996 SOL
0.0000%
93
BYDFi
BTC-USDT$1.00
0.0003301 Eth
$53,270,206.00
695.155 BTC
0.0000%
94
Binance
FTM-USDT$1.001
0.0003300 Eth
$52,205,679.00
71,902,804.000 FTM
0.0001%
95
Gate.io
SUI-USDT$1.00
0.0003290 Eth
$51,302,951.00
22,529,270.570 SUI
0.0000%
96
Binance
UNI-USDT$1.00
0.0003290 Eth
$50,307,322.00
5,687,956.780 UNI
0.0000%
97
Binance
AAVE-USDT$1.00
0.0003290 Eth
$49,721,470.00
270,925.420 AAVE
0.0000%
98
Bitunix
BNB-USDT$1.00
0.0003289 Eth
$48,349,012.00
76,432.469 BNB
0.0000%
99
WhiteBIT
AVAX-USDT$1.00
0.0003294 Eth
$46,663,764.00
1,573,846.136 AVAX
0.0000%
100
Binance
ICP-USDT$1.00
0.0003290 Eth
$41,838,997.00
5,089,657.280 ICP
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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