ETH Price: $3,376.24 (+0.26%)

Token

Tether USD (USDT)
 

Overview

Max Total Supply

76,926,220,145.483487 USDT

Holders

6,531,683 ( -0.087%)

Market

Price

$1.00 @ 0.000296 ETH (-0.05%)

Onchain Market Cap

$76,760,982,624.61

Circulating Supply Market Cap

$138,794,106,125.00

Other Info

Token Contract (WITH 6 Decimals)

Balance
8,081.907497 USDT

Value
$8,064.55 ( ~2.3886 Eth) [0.0000%]
0x977c19fd076e281015df43bd2f71ae34060dec76
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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):$27,026,292,282.00
Market Capitalization:$138,794,106,125.00
Circulating Supply:139,005,076,767.00 USDT
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
Bybit
BTC-USDT$0.9984
0.0002956 Eth
$1,242,054,992.00
13,094.325 BTC
0.0000%
2
OrangeX
BTC-USDT$0.9975
0.0002952 Eth
$887,590,691.00
9,366.843 BTC
0.0000%
3
Binance
BTC-USDT$0.9985
0.0002957 Eth
$748,107,916.00
7,887.277 BTC
0.0000%
4
BVOX
BTC-USDT$0.9975
0.0002952 Eth
$622,130,556.00
6,565.309 BTC
0.0000%
5
OrangeX
ETH-USDT$0.9975
0.0002952 Eth
$574,225,459.00
169,654.343 ETH
0.0000%
6
WhiteBIT
BTC-USDT$0.9982
0.0002937 Eth
$571,678,073.00
6,027.222 BTC
0.0000%
7
Binance
ETH-USDT$0.9983
0.0002952 Eth
$510,916,616.00
150,819.418 ETH
0.0000%
8
Toobit
BTC-USDT$0.9984
0.0002952 Eth
$456,355,063.00
4,810.807 BTC
0.0000%
9
Tapbit
ETH-USDT$0.9984
0.0002952 Eth
$398,558,152.00
117,605.477 ETH
0.0000%
10
FameEX
ETH-USDT$0.999
0.0002935 Eth
$388,434,325.00
114,599.734 ETH
0.0000%
11
Toobit
ETH-USDT$0.9984
0.0002952 Eth
$347,593,449.00
102,582.647 ETH
0.0000%
12
CoinW
BTC-USDT$0.9984
0.0002957 Eth
$336,993,197.00
3,569.664 BTC
0.0000%
13
Bybit
ETH-USDT$0.9984
0.0002956 Eth
$289,849,982.00
85,553.959 ETH
0.0000%
14
MEXC
ETH-USDT$0.9984
0.0002936 Eth
$282,234,390.00
82,949.886 ETH
0.0000%
15
WhiteBIT
ETH-USDT$0.9983
0.0002936 Eth
$280,455,960.00
82,461.930 ETH
0.0000%
16
Ourbit
ETH-USDT$0.9984
0.0002952 Eth
$244,981,476.00
72,316.047 ETH
0.0000%
17
OKX
BTC-USDT$0.9985
0.0002957 Eth
$242,638,322.00
2,556.813 BTC
0.0000%
18
Bitget
BTC-USDT$0.9983
0.0002956 Eth
$240,163,922.00
2,531.552 BTC
0.0000%
19
Bitget
ETH-USDT$0.9983
0.0002956 Eth
$225,021,241.00
66,423.944 ETH
0.0000%
20
Binance
BNB-USDT$0.9984
0.0002951 Eth
$211,248,159.00
293,466.933 BNB
0.0000%
21
Binance
DOGE-USDT$0.9985
0.0002952 Eth
$208,943,967.00
645,647,132.000 DOGE
0.0045%
22
CoinW
ETH-USDT$0.9986
0.0002956 Eth
$206,881,645.00
61,300.917 ETH
0.0000%
23
Hotcoin
BTC-USDT$0.9984
0.0002946 Eth
$192,258,008.00
2,032.669 BTC
0.0000%
24
DigiFinex
BTC-USDT$0.9983
0.0002956 Eth
$190,652,643.00
2,017.619 BTC
0.0000%
25
Binance
PEPE-USDT$0.9988
0.0002946 Eth
$179,924,933.00
9,624,812,295,076.000 PEPE
66.9722%
26
BitMart
BTC-USDT$0.9984
0.0002956 Eth
$179,086,692.00
1,895.779 BTC
0.0000%
27
OKX
ETH-USDT$0.9984
0.0002956 Eth
$169,450,981.00
50,014.553 ETH
0.0000%
28
HTX
BTC-USDT$0.9984
0.0002957 Eth
$151,430,263.00
1,596.668 BTC
0.0000%
29
BitMart
ETH-USDT$0.9984
0.0002956 Eth
$146,608,375.00
43,399.231 ETH
0.0000%
30
Binance
HBAR-USDT$0.9986
0.0002951 Eth
$146,218,522.00
503,338,363.000 HBAR
0.0035%
31
LBank
BTC-USDT$0.9983
0.0002951 Eth
$143,595,565.00
1,519.594 BTC
0.0000%
32
Bybit
VANA-USDT$0.9984
0.0002956 Eth
$143,057,020.00
7,751,694.770 VANA
0.0001%
33
Bitunix
BTC-USDT$0.9984
0.0002952 Eth
$141,215,889.00
1,493.426 BTC
0.0000%
34
Bybit
SOL-USDT$0.9984
0.0002956 Eth
$140,580,838.00
724,882.194 SOL
0.0000%
35
Biconomy.com
BTC-USDT$0.9986
0.0002956 Eth
$130,778,911.00
1,378.337 BTC
0.0000%
36
Binance
PHA-USDT$0.9984
0.0002952 Eth
$126,127,410.00
274,326,804.000 PHA
0.0019%
37
Gate.io
ETH-USDT$0.9984
0.0002957 Eth
$125,561,504.00
37,053.539 ETH
0.0000%
38
Coinstore
ETH-USDT$0.9982
0.0002936 Eth
$117,704,011.00
34,752.259 ETH
0.0000%
39
Bybit
USDC-USDT$0.9984
0.0002956 Eth
$116,479,067.00
116,451,752.230 USDC
0.0008%
40
OKX
DOGE-USDT$0.9984
0.0002956 Eth
$113,328,783.00
350,212,893.573 DOGE
0.0024%
41
Binance
THE-USDT$0.9988
0.0002946 Eth
$99,139,560.00
60,568,932.500 THE
0.0004%
42
Binance
XVG-USDT$0.9984
0.0002952 Eth
$98,250,694.00
6,656,538,557.000 XVG
0.0463%
43
LATOKEN
BTC-USDT$0.9984
0.0002952 Eth
$90,469,481.00
957.730 BTC
0.0000%
44
KuCoin
ETH-USDT$0.9985
0.0002957 Eth
$86,885,257.00
25,720.783 ETH
0.0000%
45
DigiFinex
ETH-USDT$0.9983
0.0002956 Eth
$85,983,070.00
25,455.245 ETH
0.0000%
46
Tapbit
BTC-USDT$0.9983
0.0002938 Eth
$85,859,660.00
904.979 BTC
0.0000%
47
WhiteBIT
PEPE-USDT$0.9984
0.0002952 Eth
$85,716,128.00
4,655,153,416,170.000 PEPE
32.3919%
48
Coinstore
BTC-USDT$0.9984
0.0002938 Eth
$84,658,615.00
892.813 BTC
0.0000%
49
Biconomy.com
ETH-USDT$0.9984
0.0002938 Eth
$84,495,011.00
24,939.169 ETH
0.0000%
50
Bybit
XRP-USDT$0.9984
0.0002956 Eth
$79,725,690.00
36,557,848.180 XRP
0.0003%
51
KuCoin
BTC-USDT$0.9985
0.0002957 Eth
$79,016,106.00
836.057 BTC
0.0000%
52
OKX
SOL-USDT$0.9984
0.0002956 Eth
$78,406,215.00
404,449.738 SOL
0.0000%
53
LBank
DOGE-USDT$0.9983
0.0002952 Eth
$76,894,111.00
238,578,909.000 DOGE
0.0017%
54
Binance
ADA-USDT$0.9984
0.0002938 Eth
$74,066,418.00
83,238,932.700 ADA
0.0006%
55
Binance
AAVE-USDT$0.9983
0.0002952 Eth
$72,560,052.00
211,637.258 AAVE
0.0000%
56
WhiteBIT
HBAR-USDT$0.9985
0.0002956 Eth
$71,075,698.00
247,778,854.430 HBAR
0.0017%
57
LATOKEN
ETH-USDT$0.9984
0.0002952 Eth
$70,829,679.00
20,982.875 ETH
0.0000%
58
WhiteBIT
DOGE-USDT$0.9985
0.0002956 Eth
$68,002,488.00
211,314,399.200 DOGE
0.0015%
59
MEXC
DOGE-USDT$0.9975
0.0002952 Eth
$66,774,975.00
207,698,284.100 DOGE
0.0014%
60
HTX
DOGE-USDT$0.9984
0.0002957 Eth
$66,357,561.00
205,055,614.408 DOGE
0.0014%
61
WhiteBIT
XRP-USDT$0.9985
0.0002956 Eth
$65,627,014.00
30,379,265.070 XRP
0.0002%
62
Bybit
PENGU-USDT$0.9984
0.0002956 Eth
$64,996,595.00
1,837,581,133.000 PENGU
0.0128%
63
Binance
CRV-USDT$0.9985
0.0002957 Eth
$64,607,186.00
64,633,935.600 CRV
0.0004%
64
Binance
ENA-USDT$0.9985
0.0002957 Eth
$63,759,396.00
67,694,134.900 ENA
0.0005%
65
BTSE
ETH-USDT$0.9983
0.0002956 Eth
$63,653,319.00
18,844.589 ETH
0.0000%
66
Bitget
DOGE-USDT$0.9983
0.0002956 Eth
$63,237,581.00
195,410,273.326 DOGE
0.0014%
67
Binance
FTM-USDT$0.9988
0.0002946 Eth
$60,491,978.00
75,975,014.000 FTM
0.0005%
68
Hotcoin
ETH-USDT$0.9984
0.0002952 Eth
$56,139,114.00
16,625.274 ETH
0.0000%
69
Binance
MOVE-USDT$0.9984
0.0002952 Eth
$55,801,200.00
55,653,336.700 MOVE
0.0004%
70
HTX
ETH-USDT$0.9984
0.0002957 Eth
$49,734,361.00
14,689.434 ETH
0.0000%
71
BingX
BTC-USDT$0.9984
0.0002956 Eth
$49,527,322.00
522.019 BTC
0.0000%
72
DigiFinex
TRX-USDT$0.9983
0.0002956 Eth
$49,197,580.00
189,003,576.500 TRX
0.0013%
73
BigONE
ETH-USDT$0.9985
0.0002956 Eth
$48,718,485.00
14,422.719 ETH
0.0000%
74
Bybit
DOGE-USDT$0.9984
0.0002956 Eth
$46,166,290.00
142,649,624.800 DOGE
0.0010%
75
Binance
RSR-USDT$0.9983
0.0002952 Eth
$43,898,175.00
2,930,990,830.500 RSR
0.0204%
76
WhiteBIT
CRV-USDT$0.997
0.0002933 Eth
$43,665,068.00
44,164,724.441 CRV
0.0003%
77
Bybit
MNT-USDT$0.9984
0.0002956 Eth
$43,517,059.00
35,984,118.780 MNT
0.0003%
78
KuCoin
XRP-USDT$0.9985
0.0002957 Eth
$43,120,323.00
19,930,418.598 XRP
0.0001%
79
Bitget
NEIROCTO-USDT$0.9984
0.0002956 Eth
$40,243,492.00
41,929,372,091.040 NEIROCTO
0.2918%
80
Hibt
BTC-USDT$0.9984
0.0002957 Eth
$38,696,308.00
408.038 BTC
0.0000%
81
DigiFinex
DOGE-USDT$0.9983
0.0002956 Eth
$36,912,135.00
114,532,222.770 DOGE
0.0008%
82
KuCoin
SOL-USDT$0.9985
0.0002957 Eth
$35,625,180.00
183,376.748 SOL
0.0000%
83
Binance
PNUT-USDT$0.9985
0.0002957 Eth
$35,310,299.00
56,195,429.200 PNUT
0.0004%
84
Bybit
SUI-USDT$0.9984
0.0002956 Eth
$32,799,872.00
7,862,591.030 SUI
0.0001%
85
Gate.io
ONDO-USDT$0.9983
0.0002956 Eth
$32,720,686.00
22,145,212.960 ONDO
0.0002%
86
Binance
NEIRO-USDT$0.9974
0.0002953 Eth
$31,703,528.00
33,126,833,911.000 NEIRO
0.2305%
87
BYDFi
BTC-USDT$0.9984
0.0002952 Eth
$31,535,468.00
334.018 BTC
0.0000%
88
WhiteBIT
ADA-USDT$0.9985
0.0002956 Eth
$30,526,443.00
34,115,586.120 ADA
0.0002%
89
OKX
MOVE-USDT$0.9984
0.0002956 Eth
$30,107,744.00
30,069,430.200 MOVE
0.0002%
90
CoinEx
BTC-USDT$0.9985
0.0002956 Eth
$29,675,218.00
312.705 BTC
0.0000%
91
MEXC
KAS-USDT$0.9975
0.0002952 Eth
$28,824,033.00
242,674,125.480 KAS
0.0017%
92
BingX
ETH-USDT$0.9984
0.0002956 Eth
$27,926,812.00
8,242.552 ETH
0.0000%
93
OKX
XRP-USDT$0.9984
0.0002956 Eth
$26,113,875.00
11,975,895.072 XRP
0.0001%
94
Binance
DOT-USDT$0.9983
0.0002952 Eth
$25,535,904.00
3,622,915.380 DOT
0.0000%
95
Binance
ROSE-USDT$0.9984
0.0002938 Eth
$23,537,136.00
254,914,322.800 ROSE
0.0018%
96
WhiteBIT
AAVE-USDT$0.9985
0.0002956 Eth
$23,059,684.00
68,817.328 AAVE
0.0000%
97
Hibt
ETH-USDT$0.9984
0.0002957 Eth
$22,645,754.00
6,684.268 ETH
0.0000%
98
Azbit
BTC-USDT$0.9983
0.0002933 Eth
$22,389,410.00
236.049 BTC
0.0000%
99
LBank
ADA-USDT$0.9982
0.0002936 Eth
$22,274,556.00
24,598,935.600 ADA
0.0002%
100
WhiteBIT
LINK-USDT$0.9986
0.0002933 Eth
$19,852,934.00
915,354.990 LINK
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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