ETH Price: $3,905.10 (+0.53%)

Token

Tether USD (USDT)
 

Overview

Max Total Supply

76,928,104,353.364467 USDT

Holders

6,550,682 ( -0.035%)

Market

Price

$1.00 @ 0.000256 ETH (+0.01%)

Onchain Market Cap

$76,927,950,497.16

Circulating Supply Market Cap

$140,202,608,021.00

Other Info

Token Contract (WITH 6 Decimals)

Balance
0 USDT

Value
$0.00
0x99f62dc506e2021360620af1da9abab158d0128b
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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):$60,863,892,685.00
Market Capitalization:$140,202,608,021.00
Circulating Supply:140,253,672,849.00 USDT
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
Bybit
BTC-USDT$0.9994
0.0002562 Eth
$1,911,819,020.00
18,783.003 BTC
0.0000%
2
Binance
BTC-USDT$0.9999
0.0002564 Eth
$1,629,218,545.00
15,963.207 BTC
0.0000%
3
BVOX
BTC-USDT$0.9995
0.0002564 Eth
$1,263,307,878.00
12,385.663 BTC
0.0000%
4
Binance
FDUSD-USDT$0.9996
0.0002570 Eth
$1,076,495,645.00
1,076,076,187.000 FDUSD
0.0083%
5
OrangeX
BTC-USDT$0.9995
0.0002573 Eth
$1,051,089,819.00
10,282.631 BTC
0.0000%
6
Ourbit
BTC-USDT$0.9997
0.0002564 Eth
$964,694,872.00
9,453.756 BTC
0.0000%
7
AscendEX (BitMax)
BTC-USDT$0.9997
0.0002564 Eth
$953,246,054.00
9,258.734 BTC
0.0000%
8
Toobit
BTC-USDT$1.00
0.0002569 Eth
$920,284,836.00
9,005.051 BTC
0.0000%
9
MEXC
BTC-USDT$0.9994
0.0002562 Eth
$911,548,871.00
8,854.807 BTC
0.0000%
10
Binance
ETH-USDT$0.9996
0.0002567 Eth
$907,236,259.00
234,555.579 ETH
0.0000%
11
Tapbit
ETH-USDT$0.9994
0.0002562 Eth
$695,780,669.00
179,929.190 ETH
0.0000%
12
DigiFinex
BTC-USDT$0.9999
0.0002564 Eth
$686,921,561.00
6,667.653 BTC
0.0000%
13
Toobit
ETH-USDT$0.9995
0.0002565 Eth
$616,852,937.00
159,464.069 ETH
0.0000%
14
P2B
BTC-USDT$0.9997
0.0002564 Eth
$611,349,365.00
5,940.482 BTC
0.0000%
15
Binance
XRP-USDT$0.9991
0.0002568 Eth
$601,998,815.00
250,410,244.000 XRP
0.0019%
16
Bybit
ETH-USDT$0.9994
0.0002562 Eth
$589,898,992.00
152,574.942 ETH
0.0000%
17
WhiteBIT
BTC-USDT$0.9995
0.0002567 Eth
$568,246,037.00
5,530.073 BTC
0.0000%
18
AscendEX (BitMax)
ETH-USDT$0.9997
0.0002564 Eth
$517,096,046.00
132,385.470 ETH
0.0000%
19
Bitget
ETH-USDT$0.9995
0.0002564 Eth
$497,914,143.00
128,786.791 ETH
0.0000%
20
Bitget
BTC-USDT$0.9995
0.0002564 Eth
$493,293,925.00
4,834.120 BTC
0.0000%
21
Binance
SOL-USDT$0.9991
0.0002568 Eth
$475,218,097.00
2,170,838.977 SOL
0.0000%
22
OKX
BTC-USDT$0.9999
0.0002564 Eth
$457,339,467.00
4,477.246 BTC
0.0000%
23
BVOX
ETH-USDT$0.9995
0.0002565 Eth
$426,229,531.00
110,189.433 ETH
0.0000%
24
BitMart
BTC-USDT$0.9997
0.0002564 Eth
$386,757,043.00
3,759.050 BTC
0.0000%
25
Azbit
BTC-USDT$0.9996
0.0002564 Eth
$376,827,367.00
3,701.998 BTC
0.0000%
26
WEEX
ETH-USDT$0.9995
0.0002572 Eth
$374,537,493.00
96,866.918 ETH
0.0000%
27
DigiFinex
ETH-USDT$0.9999
0.0002564 Eth
$371,641,448.00
95,098.008 ETH
0.0000%
28
Bitunix
BTC-USDT$0.9995
0.0002565 Eth
$365,120,163.00
3,549.100 BTC
0.0000%
29
P2B
ETH-USDT$0.9995
0.0002565 Eth
$364,076,379.00
93,473.414 ETH
0.0000%
30
XT.COM
BTC-USDT$0.9995
0.0002572 Eth
$362,739,678.00
3,556.745 BTC
0.0000%
31
OKX
ETH-USDT$0.9995
0.0002564 Eth
$361,201,455.00
93,410.572 ETH
0.0000%
32
WhiteBIT
ETH-USDT$0.9997
0.0002564 Eth
$358,698,775.00
91,964.836 ETH
0.0000%
33
Hotcoin
BTC-USDT$0.9997
0.0002564 Eth
$352,150,114.00
3,421.045 BTC
0.0000%
34
CoinW
ETH-USDT$0.9992
0.0002572 Eth
$336,635,287.00
86,579.411 ETH
0.0000%
35
Ourbit
ETH-USDT$0.9994
0.0002562 Eth
$321,043,699.00
82,973.150 ETH
0.0000%
36
BitMart
ETH-USDT$0.9997
0.0002564 Eth
$268,224,739.00
68,847.058 ETH
0.0000%
37
KuCoin
XRP-USDT$0.9998
0.0002564 Eth
$264,825,582.00
109,073,107.549 XRP
0.0008%
38
Binance
LINK-USDT$0.9996
0.0002571 Eth
$255,003,144.00
8,682,898.940 LINK
0.0001%
39
Binance
PEPE-USDT$0.9994
0.0002562 Eth
$251,592,782.00
10,805,390,501,499.000 PEPE
83.7318%
40
OKX
DOGE-USDT$0.9995
0.0002564 Eth
$244,734,241.00
617,713,659.833 DOGE
0.0048%
41
Binance
FLOKI-USDT$0.9991
0.0002568 Eth
$237,821,234.00
1,008,059,768,781.000 FLOKI
7.8115%
42
Binance
SUI-USDT$0.9997
0.0002564 Eth
$233,455,101.00
52,089,599.400 SUI
0.0004%
43
Gate.io
BTC-USDT$0.9995
0.0002564 Eth
$218,249,158.00
2,138.104 BTC
0.0000%
44
Tapbit
BTC-USDT$0.9996
0.0002564 Eth
$201,157,317.00
1,971.755 BTC
0.0000%
45
HTX
BTC-USDT$0.9997
0.0002564 Eth
$195,934,520.00
1,920.717 BTC
0.0000%
46
Biconomy.com
BTC-USDT$0.9996
0.0002573 Eth
$195,231,917.00
1,916.325 BTC
0.0000%
47
Bitget
BGB-USDT$0.9995
0.0002564 Eth
$193,382,367.00
63,653,264.158 BGB
0.0005%
48
Binance
BNB-USDT$0.9996
0.0002569 Eth
$187,600,759.00
263,427.888 BNB
0.0000%
49
Bitunix
ETH-USDT$0.9995
0.0002565 Eth
$178,880,813.00
45,920.186 ETH
0.0000%
50
LATOKEN
BTC-USDT$0.9997
0.0002564 Eth
$176,048,175.00
1,709.992 BTC
0.0000%
51
Bybit
SOL-USDT$0.9994
0.0002562 Eth
$165,796,723.00
756,823.734 SOL
0.0000%
52
Binance
ACT-USDT$0.9994
0.0002562 Eth
$155,118,724.00
268,375,828.800 ACT
0.0021%
53
Gate.io
ETH-USDT$0.9995
0.0002564 Eth
$141,385,899.00
36,596.403 ETH
0.0000%
54
Binance
ADA-USDT$0.9996
0.0002571 Eth
$139,511,552.00
130,650,694.900 ADA
0.0010%
55
Bitget
DOGE-USDT$0.9995
0.0002564 Eth
$137,411,822.00
346,672,085.101 DOGE
0.0027%
56
Bitget
XRP-USDT$0.9995
0.0002564 Eth
$134,048,184.00
55,740,729.552 XRP
0.0004%
57
WhiteBIT
XRP-USDT$0.9996
0.0002564 Eth
$132,586,378.00
54,730,912.620 XRP
0.0004%
58
LATOKEN
ETH-USDT$0.9996
0.0002565 Eth
$130,175,021.00
33,379.382 ETH
0.0000%
59
Bybit
XRP-USDT$0.9994
0.0002562 Eth
$129,206,959.00
53,745,638.270 XRP
0.0004%
60
KuCoin
BTC-USDT$0.9998
0.0002564 Eth
$128,705,315.00
1,249.755 BTC
0.0000%
61
KuCoin
ETH-USDT$0.9998
0.0002564 Eth
$126,212,966.00
32,316.566 ETH
0.0000%
62
Hotcoin
ETH-USDT$0.9997
0.0002564 Eth
$118,263,210.00
30,321.486 ETH
0.0000%
63
Gate.io
FLOKI-USDT$0.9998
0.0002564 Eth
$116,726,359.00
487,643,277,952.000 FLOKI
3.7788%
64
Bitget
X-USDT$0.9995
0.0002564 Eth
$115,809,330.00
563,419,054,382.900 X
4.3660%
65
Binance
AVAX-USDT$0.9996
0.0002570 Eth
$115,558,294.00
2,314,469.960 AVAX
0.0000%
66
OKX
SOL-USDT$0.9995
0.0002564 Eth
$115,232,694.00
525,645.002 SOL
0.0000%
67
Binance
AAVE-USDT$0.9996
0.0002567 Eth
$110,938,485.00
302,183.010 AAVE
0.0000%
68
WEEX
XRP-USDT$0.9995
0.0002572 Eth
$100,063,708.00
41,421,335.009 XRP
0.0003%
69
WhiteBIT
LINK-USDT$0.9995
0.0002565 Eth
$99,385,870.00
3,439,405.060 LINK
0.0000%
70
Binance
CRV-USDT$0.9999
0.0002564 Eth
$96,778,868.00
85,062,169.600 CRV
0.0007%
71
Binance
HBAR-USDT$0.9996
0.0002569 Eth
$96,062,681.00
329,539,665.000 HBAR
0.0026%
72
OKX
XRP-USDT$0.9995
0.0002564 Eth
$95,339,138.00
39,628,716.948 XRP
0.0003%
73
Binance
PNUT-USDT$0.9994
0.0002562 Eth
$94,132,903.00
82,445,767.600 PNUT
0.0006%
74
Gate.io
XRP-USDT$0.9995
0.0002564 Eth
$93,854,411.00
39,023,002.876 XRP
0.0003%
75
Binance
UNI-USDT$0.9999
0.0002564 Eth
$93,786,696.00
5,630,300.720 UNI
0.0000%
76
Bybit
DOGE-USDT$0.9994
0.0002562 Eth
$89,886,972.00
226,896,278.000 DOGE
0.0018%
77
Bybit
MNT-USDT$0.9994
0.0002562 Eth
$89,581,433.00
73,278,525.040 MNT
0.0006%
78
MEXC
MX-USDT$0.9997
0.0002570 Eth
$86,007,575.00
23,567,418.520 MX
0.0002%
79
Gate.io
DOGE-USDT$0.9995
0.0002564 Eth
$82,512,836.00
208,231,175.320 DOGE
0.0016%
80
DigiFinex
DOGE-USDT$0.9999
0.0002564 Eth
$82,277,571.00
203,256,445.680 DOGE
0.0016%
81
HTX
DOGE-USDT$0.9997
0.0002564 Eth
$79,831,775.00
201,578,406.204 DOGE
0.0016%
82
Bitget
SOL-USDT$0.9995
0.0002564 Eth
$76,447,403.00
348,667.686 SOL
0.0000%
83
Gate.io
SUI-USDT$0.9999
0.0002564 Eth
$71,067,927.00
15,900,286.920 SUI
0.0001%
84
BYDFi
BTC-USDT$0.9999
0.0002570 Eth
$67,873,802.00
660.162 BTC
0.0000%
85
WEEX
SOL-USDT$0.9994
0.0002562 Eth
$67,269,634.00
307,063.041 SOL
0.0000%
86
DigiFinex
TRX-USDT$0.9999
0.0002564 Eth
$65,187,453.00
227,961,215.900 TRX
0.0018%
87
WhiteBIT
HBAR-USDT$0.9996
0.0002564 Eth
$63,927,195.00
216,548,264.380 HBAR
0.0017%
88
Dex-Trade
BTC-USDT$0.9996
0.0002565 Eth
$62,297,419.00
605.303 BTC
0.0000%
89
WhiteBIT
ADA-USDT$0.9997
0.0002564 Eth
$59,121,035.00
54,247,267.070 ADA
0.0004%
90
HTX
ETH-USDT$0.9997
0.0002564 Eth
$58,775,507.00
15,202.529 ETH
0.0000%
91
OKX
SUI-USDT$0.9995
0.0002564 Eth
$56,604,959.00
12,633,469.942 SUI
0.0001%
92
Binance
NEIRO-USDT$0.9998
0.0002566 Eth
$56,065,787.00
35,036,389,892.000 NEIRO
0.2715%
93
Bitget
SUI-USDT$0.9995
0.0002564 Eth
$54,569,405.00
12,181,993.300 SUI
0.0001%
94
Gate.io
LINK-USDT$0.9995
0.0002564 Eth
$53,586,041.00
1,823,659.200 LINK
0.0000%
95
KuCoin
SOL-USDT$0.9998
0.0002564 Eth
$50,040,315.00
226,052.589 SOL
0.0000%
96
MEXC
SOL-USDT$0.9994
0.0002562 Eth
$48,855,363.00
220,804.250 SOL
0.0000%
97
CoinEx
BTC-USDT$0.9997
0.0002564 Eth
$45,537,286.00
446.599 BTC
0.0000%
98
BingX
BTC-USDT$0.9994
0.0002562 Eth
$44,474,783.00
436.358 BTC
0.0000%
99
BingX
ETH-USDT$0.9994
0.0002562 Eth
$43,278,313.00
11,191.698 ETH
0.0000%
100
DigiFinex
XRP-USDT$0.9999
0.0002564 Eth
$33,085,939.00
13,619,866.000 XRP
0.0001%

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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