ETH Price: $3,574.53 (-1.04%)

Token

Tether USD (USDT)
 

Overview

Max Total Supply

71,929,452,093.657795 USDT

Holders

6,480,873 ( 0.139%)

Market

Price

$1.00 @ 0.000280 ETH (+0.09%)

Onchain Market Cap

$72,073,310,997.85

Circulating Supply Market Cap

$134,815,647,457.00

Other Info

Token Contract (WITH 6 Decimals)

Balance
55.450368 USDT

Value
$55.56 ( ~0.0155433193876517 Eth) [0.0000%]
0x1b0b3b04960a70a3dcc978aa0d1fc30e0267a6d8
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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):$159,820,404,168.00
Market Capitalization:$134,815,647,457.00
Circulating Supply:134,658,029,655.00 USDT
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
Binance
XRP-USDT$1.00
0.0002803 Eth
$5,191,643,391.00
1,989,840,506.210 XRP
10.9768%
2
Binance
BTC-USDT$1.00
0.0002797 Eth
$3,288,612,378.00
34,515.099 BTC
0.0002%
3
Pionex
BTC-USDT$1.00
0.0002811 Eth
$2,857,559,930.00
29,966.656 BTC
0.0002%
4
BVOX
BTC-USDT$1.00
0.0002798 Eth
$2,372,304,233.00
24,882.453 BTC
0.0001%
5
Bybit
BTC-USDT$1.00
0.0002797 Eth
$2,204,199,311.00
23,107.921 BTC
0.0001%
6
Bybit
XRP-USDT$1.00
0.0002797 Eth
$2,066,281,755.00
800,571,405.870 XRP
4.4163%
7
Ourbit
BTC-USDT$1.00
0.0002796 Eth
$1,974,791,940.00
20,726.809 BTC
0.0001%
8
MEXC
BTC-USDT$1.00
0.0002798 Eth
$1,827,964,688.00
19,171.566 BTC
0.0001%
9
Pionex
ETH-USDT$1.00
0.0002796 Eth
$1,815,926,271.00
504,182.737 ETH
0.0028%
10
Binance
DOGE-USDT$1.00
0.0002798 Eth
$1,690,815,194.00
4,110,993,483.000 DOGE
22.6781%
11
Bitget
XRP-USDT$1.00
0.0002799 Eth
$1,600,227,625.00
616,444,499.895 XRP
3.4006%
12
Toobit
ETH-USDT$1.00
0.0002802 Eth
$1,493,461,378.00
414,977.576 ETH
0.0023%
13
Binance
HBAR-USDT$1.001
0.0002799 Eth
$1,329,181,686.00
3,908,623,275.000 HBAR
21.5617%
14
Binance
SOL-USDT$1.00
0.0002801 Eth
$1,291,939,256.00
5,765,333.392 SOL
0.0318%
15
Binance
FDUSD-USDT$1.00
0.0002808 Eth
$1,148,167,140.00
1,150,056,605.000 FDUSD
6.3442%
16
WhiteBIT
BTC-USDT$1.00
0.0002798 Eth
$1,143,604,410.00
11,988.088 BTC
0.0001%
17
LBank
BTC-USDT$1.00
0.0002798 Eth
$1,128,355,832.00
11,829.052 BTC
0.0001%
18
MEXC
ETH-USDT$1.00
0.0002799 Eth
$1,051,394,023.00
293,768.301 ETH
0.0016%
19
BVOX
ETH-USDT$1.00
0.0002799 Eth
$1,032,546,170.00
286,796.537 ETH
0.0016%
20
Binance
ADA-USDT$1.00
0.0002797 Eth
$1,007,062,517.00
811,555,348.800 ADA
4.4769%
21
BitMart
BTC-USDT$1.00
0.0002798 Eth
$948,117,538.00
9,930.502 BTC
0.0001%
22
Bybit
ETH-USDT$1.00
0.0002797 Eth
$947,245,317.00
262,936.945 ETH
0.0015%
23
AscendEX (BitMax)
BTC-USDT$1.00
0.0002798 Eth
$942,860,493.00
9,888.249 BTC
0.0001%
24
OKX
XRP-USDT$1.00
0.0002798 Eth
$929,662,405.00
357,432,700.983 XRP
1.9718%
25
BitMart
ETH-USDT$1.00
0.0002798 Eth
$916,538,637.00
256,158.968 ETH
0.0014%
26
Bitunix
BTC-USDT$1.00
0.0002798 Eth
$891,813,034.00
9,340.729 BTC
0.0001%
27
Binance
TRX-USDT$1.00
0.0002797 Eth
$831,540,075.00
3,348,389,126.800 TRX
18.4712%
28
Ourbit
ETH-USDT$1.00
0.0002799 Eth
$819,423,883.00
227,504.079 ETH
0.0013%
29
Bitget
ETH-USDT$1.00
0.0002799 Eth
$805,051,001.00
223,571.747 ETH
0.0012%
30
WhiteBIT
TRX-USDT$1.001
0.0002798 Eth
$803,745,841.00
2,797,480,000.890 TRX
15.4321%
31
Gate.io
XRP-USDT$1.00
0.0002798 Eth
$799,883,185.00
305,209,587.771 XRP
1.6837%
32
OKX
BTC-USDT$1.00
0.0002797 Eth
$791,810,583.00
8,308.915 BTC
0.0000%
33
Bitget
BTC-USDT$1.00
0.0002799 Eth
$790,963,061.00
8,297.092 BTC
0.0000%
34
P2B
BTC-USDT$1.00
0.0002799 Eth
$788,822,163.00
8,270.576 BTC
0.0000%
35
Binance
LINK-USDT$1.00
0.0002797 Eth
$741,500,684.00
30,052,520.690 LINK
0.1658%
36
Binance
BNB-USDT$1.00
0.0002801 Eth
$720,230,578.00
1,103,990.694 BNB
0.0061%
37
MEXC
XRP-USDT$1.00
0.0002811 Eth
$695,699,159.00
276,489,586.980 XRP
1.5252%
38
Hotcoin
BTC-USDT$1.00
0.0002796 Eth
$667,855,903.00
6,998.810 BTC
0.0000%
39
Binance
SUI-USDT$1.00
0.0002800 Eth
$642,520,898.00
176,842,480.300 SUI
0.9755%
40
Bitunix
XRP-USDT$1.00
0.0002798 Eth
$636,456,701.00
248,795,377.000 XRP
1.3725%
41
Binance
PEPE-USDT$1.00
0.0002801 Eth
$611,222,809.00
30,535,313,673,978.000 PEPE
168,446.2879%
42
Binance
XLM-USDT$1.00
0.0002801 Eth
$571,886,823.00
1,067,323,360.000 XLM
5.8878%
43
OKX
ETH-USDT$1.00
0.0002798 Eth
$561,994,515.00
156,240.336 ETH
0.0009%
44
OKX
DOGE-USDT$1.00
0.0002798 Eth
$558,554,248.00
1,361,014,508.587 DOGE
7.5080%
45
Binance
AVAX-USDT$1.00
0.0002796 Eth
$513,802,021.00
10,100,586.710 AVAX
0.0557%
46
Binance
RSR-USDT$1.00
0.0002805 Eth
$511,287,080.00
28,762,016,799.300 RSR
158.6640%
47
AscendEX (BitMax)
ETH-USDT$1.00
0.0002798 Eth
$507,258,858.00
141,791.793 ETH
0.0008%
48
Bitunix
ETH-USDT$1.00
0.0002798 Eth
$506,392,796.00
141,567.423 ETH
0.0008%
49
Binance
FTM-USDT$1.00
0.0002808 Eth
$460,587,825.00
375,195,294.000 FTM
2.0697%
50
WhiteBIT
ETH-USDT$1.00
0.0002796 Eth
$455,527,757.00
127,407.006 ETH
0.0007%
51
HTX
BTC-USDT$1.00
0.0002799 Eth
$432,942,967.00
4,539.429 BTC
0.0000%
52
WhiteBIT
LINK-USDT$1.00
0.0002812 Eth
$421,927,103.00
17,660,401.890 LINK
0.0974%
53
Binance
LTC-USDT$1.00
0.0002808 Eth
$421,666,450.00
3,211,881.191 LTC
0.0177%
54
Binance
SHIB-USDT$1.00
0.0002803 Eth
$414,652,371.00
14,404,558,669,133.000 SHIB
79,461.9129%
55
LBank
ETH-USDT$1.00
0.0002797 Eth
$414,616,816.00
115,867.503 ETH
0.0006%
56
Binance
PNUT-USDT$1.00
0.0002797 Eth
$385,035,408.00
301,355,029.700 PNUT
1.6624%
57
Crypto.com Exchange
XRP-USDT$1.00
0.0002799 Eth
$379,900,992.00
147,369,335.000 XRP
0.8130%
58
Azbit
BTC-USDT$1.00
0.0002799 Eth
$377,056,697.00
3,949.019 BTC
0.0000%
59
Binance
SAND-USDT$1.00
0.0002797 Eth
$368,678,942.00
473,343,302.000 SAND
2.6112%
60
Binance
DOT-USDT$1.00
0.0002797 Eth
$359,239,794.00
36,660,170.650 DOT
0.2022%
61
Bybit
SOL-USDT$1.00
0.0002797 Eth
$356,413,135.00
1,591,830.946 SOL
0.0088%
62
KuCoin
XRP-USDT$1.00
0.0002799 Eth
$351,092,778.00
136,168,303.678 XRP
0.7512%
63
Bitget
DOGE-USDT$1.00
0.0002799 Eth
$343,014,953.00
833,531,349.861 DOGE
4.5981%
64
Binance
VET-USDT$1.00
0.0002797 Eth
$340,628,519.00
5,407,246,605.700 VET
29.8288%
65
LATOKEN
ETH-USDT$1.00
0.0002798 Eth
$333,672,774.00
93,237.007 ETH
0.0005%
66
BigONE
XRP-USDT$1.00
0.0002796 Eth
$316,938,863.00
124,227,545.900 XRP
0.6853%
67
WhiteBIT
AVAX-USDT$1.00
0.0002809 Eth
$292,092,862.00
5,835,592.826 AVAX
0.0322%
68
Biconomy.com
BTC-USDT$1.00
0.0002798 Eth
$286,198,684.00
3,001.260 BTC
0.0000%
69
Coinstore
ETH-USDT$1.00
0.0002790 Eth
$283,744,308.00
78,444.745 ETH
0.0004%
70
WhiteBIT
SOL-USDT$1.00
0.0002796 Eth
$280,687,991.00
1,233,521.085 SOL
0.0068%
71
BTSE
BTC-USDT$0.9999
0.0002798 Eth
$272,374,081.00
2,856.853 BTC
0.0000%
72
WhiteBIT
ADA-USDT$0.9999
0.0002798 Eth
$271,577,071.00
227,970,453.420 ADA
1.2576%
73
Binance
NEAR-USDT$1.00
0.0002797 Eth
$269,972,205.00
37,412,164.200 NEAR
0.2064%
74
Gate.io
ONDO-USDT$1.00
0.0002798 Eth
$259,105,684.00
158,743,316.900 ONDO
0.8757%
75
OKX
SOL-USDT$1.00
0.0002798 Eth
$256,672,885.00
1,147,354.604 SOL
0.0063%
76
Ourbit
XRP-USDT$1.00
0.0002796 Eth
$249,034,144.00
94,416,644.260 XRP
0.5208%
77
Binance
POL-USDT$1.00
0.0002802 Eth
$248,516,435.00
356,657,249.900 POL
1.9675%
78
Gate.io
BTC-USDT$1.00
0.0002798 Eth
$243,723,664.00
2,560.079 BTC
0.0000%
79
Biconomy.com
ETH-USDT$1.00
0.0002798 Eth
$238,484,015.00
66,234.072 ETH
0.0004%
80
Binance
FIL-USDT$1.00
0.0002797 Eth
$238,341,714.00
33,089,722.720 FIL
0.1825%
81
Bybit
DOGE-USDT$1.00
0.0002797 Eth
$237,192,227.00
577,029,193.100 DOGE
3.1831%
82
Binance
ARB-USDT$1.00
0.0002803 Eth
$232,799,300.00
226,806,731.200 ARB
1.2512%
83
Bitunix
DOGE-USDT$1.00
0.0002798 Eth
$230,680,619.00
566,629,882.000 DOGE
3.1258%
84
Binance
RUNE-USDT$1.00
0.0002797 Eth
$220,061,515.00
33,659,662.700 RUNE
0.1857%
85
Gate.io
ETH-USDT$1.00
0.0002798 Eth
$215,509,140.00
59,954.169 ETH
0.0003%
86
Binance
NEIRO-USDT$1.00
0.0002805 Eth
$215,201,888.00
123,368,214,023.000 NEIRO
680.5536%
87
HTX
DOGE-USDT$0.9999
0.0002798 Eth
$200,718,670.00
483,608,599.396 DOGE
2.6678%
88
OrangeX
ETH-USDT$1.00
0.0002799 Eth
$198,286,281.00
54,733.536 ETH
0.0003%
89
Gate.io
ADA-USDT$1.00
0.0002798 Eth
$196,644,672.00
158,639,672.284 ADA
0.8751%
90
Gate.io
DOGE-USDT$1.00
0.0002798 Eth
$195,355,066.00
474,035,437.675 DOGE
2.6150%
91
WEEX
DOGE-USDT$1.001
0.0002805 Eth
$189,703,275.00
460,956,539.588 DOGE
2.5428%
92
KuCoin
BTC-USDT$1.00
0.0002799 Eth
$182,116,214.00
1,908.823 BTC
0.0000%
93
MEXC
DOGE-USDT$1.00
0.0002810 Eth
$172,965,245.00
428,457,345.850 DOGE
2.3636%
94
OrangeX
XRP-USDT$1.00
0.0002798 Eth
$172,715,031.00
64,916,621.000 XRP
0.3581%
95
WhiteBIT
SUI-USDT$1.00
0.0002798 Eth
$156,634,367.00
41,246,462.820 SUI
0.2275%
96
KuCoin
ETH-USDT$1.00
0.0002799 Eth
$154,458,802.00
43,156.481 ETH
0.0002%
97
HTX
ETH-USDT$1.00
0.0002798 Eth
$151,227,369.00
41,971.531 ETH
0.0002%
98
WhiteBIT
DOGE-USDT$0.9999
0.0002798 Eth
$148,470,881.00
364,773,450.800 DOGE
2.0123%
99
Bybit
MNT-USDT$1.00
0.0002799 Eth
$147,592,602.00
164,891,656.790 MNT
0.9096%
100
LBank
DOGE-USDT$1.00
0.0002798 Eth
$136,770,619.00
336,203,083.000 DOGE
1.8546%

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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