ETH Price: $3,317.64 (-1.42%)
 

Overview

Max Total Supply

76,923,929,295.842438 USDT

Holders

6,553,802 ( -0.027%)

Market

Price

$1.00 @ 0.000301 ETH (-0.05%)

Onchain Market Cap

$76,885,082,711.55

Circulating Supply Market Cap

$137,532,782,994.00

Other Info

Token Contract (WITH 6 Decimals)

Balance
0 USDT

Value
$0.00
0xc628cf39a9887de8400c1051c6fb4762f9896180
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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):$100,093,438,073.00
Market Capitalization:$137,532,782,994.00
Circulating Supply:137,601,365,454.00 USDT
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
Binance
BTC-USDT$0.9996
0.0003012 Eth
$3,235,875,284.00
34,251.890 BTC
0.0000%
2
Bybit
BTC-USDT$0.9996
0.0003012 Eth
$2,929,948,376.00
30,986.121 BTC
0.0000%
3
BitMart
BTC-USDT$0.9996
0.0003012 Eth
$1,131,282,877.00
12,123.770 BTC
0.0000%
4
Bybit
ETH-USDT$0.9996
0.0003012 Eth
$1,122,961,746.00
338,636.360 ETH
0.0000%
5
Binance
USDC-USDT$0.9993
0.0003042 Eth
$984,606,355.00
984,976,214.000 USDC
0.0049%
6
CoinW
BTC-USDT$0.9995
0.0003016 Eth
$952,479,096.00
10,204.687 BTC
0.0000%
7
AscendEX (BitMax)
BTC-USDT$0.9995
0.0003010 Eth
$922,708,447.00
9,890.135 BTC
0.0000%
8
OKX
BTC-USDT$0.9996
0.0003012 Eth
$884,335,958.00
9,374.753 BTC
0.0000%
9
Binance
XRP-USDT$0.9996
0.0003012 Eth
$877,802,038.00
378,671,594.000 XRP
0.0019%
10
Bitget
BTC-USDT$0.9996
0.0003012 Eth
$824,375,332.00
8,733.073 BTC
0.0000%
11
Bitget
ETH-USDT$0.9996
0.0003012 Eth
$821,683,076.00
247,981.539 ETH
0.0000%
12
BVOX
ETH-USDT$0.9995
0.0003010 Eth
$782,017,643.00
236,154.176 ETH
0.0000%
13
DigiFinex
BTC-USDT$0.9996
0.0003012 Eth
$761,909,552.00
8,161.043 BTC
0.0000%
14
Binance
SOL-USDT$0.9995
0.0003010 Eth
$714,989,322.00
3,669,263.382 SOL
0.0000%
15
Hotcoin
BTC-USDT$0.9995
0.0003010 Eth
$690,414,512.00
7,397.891 BTC
0.0000%
16
Bitunix
BTC-USDT$0.9995
0.0003010 Eth
$589,192,871.00
6,315.176 BTC
0.0000%
17
Gate.io
BTC-USDT$0.9995
0.0003011 Eth
$554,147,742.00
5,868.886 BTC
0.0000%
18
OKX
ETH-USDT$0.9996
0.0003012 Eth
$523,456,709.00
158,223.813 ETH
0.0000%
19
AscendEX (BitMax)
ETH-USDT$0.9995
0.0003010 Eth
$510,654,385.00
154,027.193 ETH
0.0000%
20
HTX
BTC-USDT$0.9995
0.0003011 Eth
$487,696,738.00
5,155.328 BTC
0.0000%
21
Bitget
BGB-USDT$0.9996
0.0003012 Eth
$380,902,253.00
59,943,281.764 BGB
0.0003%
22
KuCoin
BTC-USDT$0.9996
0.0003012 Eth
$369,903,711.00
3,962.522 BTC
0.0000%
23
Gate.io
ETH-USDT$0.9995
0.0003011 Eth
$345,580,915.00
104,636.202 ETH
0.0000%
24
Bybit
XRP-USDT$0.9996
0.0003012 Eth
$318,632,815.00
137,409,143.670 XRP
0.0007%
25
WEEX
XRP-USDT$0.9997
0.0003044 Eth
$301,170,510.00
130,463,905.080 XRP
0.0006%
26
Binance
PEPE-USDT$0.9996
0.0003012 Eth
$286,880,862.00
16,131,600,357,058.000 PEPE
80.3430%
27
OKX
DOGE-USDT$0.9996
0.0003012 Eth
$260,384,615.00
767,185,303.184 DOGE
0.0038%
28
Bybit
SOL-USDT$0.9996
0.0003012 Eth
$259,311,591.00
1,330,124.177 SOL
0.0000%
29
KuCoin
ETH-USDT$0.9996
0.0003012 Eth
$257,888,742.00
77,710.474 ETH
0.0000%
30
Deepcoin
UXLINK-USDT$0.9997
0.0003046 Eth
$253,122,472.00
182,580,027.382 UXLINK
0.0009%
31
DigiFinex
ETH-USDT$0.9996
0.0003012 Eth
$251,534,029.00
75,797.414 ETH
0.0000%
32
MEXC
XRP-USDT$1.001
0.0003037 Eth
$246,261,471.00
105,894,522.560 XRP
0.0005%
33
Binance
BNB-USDT$0.9996
0.0003012 Eth
$243,098,645.00
351,204.263 BNB
0.0000%
34
Bybit
USDC-USDT$0.9996
0.0003012 Eth
$238,888,096.00
238,907,852.200 USDC
0.0012%
35
Bitget
XRP-USDT$0.9996
0.0003012 Eth
$223,621,039.00
96,375,366.866 XRP
0.0005%
36
FameEX
SOL-USDT$0.9996
0.0003042 Eth
$220,914,437.00
1,132,750.798 SOL
0.0000%
37
Binance
TRX-USDT$0.9997
0.0003047 Eth
$207,900,891.00
835,731,890.300 TRX
0.0042%
38
Hotcoin
ETH-USDT$0.9995
0.0003010 Eth
$201,993,888.00
60,898.003 ETH
0.0000%
39
Bitget
DOGE-USDT$0.9996
0.0003012 Eth
$182,380,942.00
538,093,299.830 DOGE
0.0027%
40
Binance
ENA-USDT$0.9996
0.0003012 Eth
$178,078,497.00
187,277,384.770 ENA
0.0009%
41
Gate.io
DOGE-USDT$0.9995
0.0003011 Eth
$162,852,462.00
479,350,935.220 DOGE
0.0024%
42
OKX
SOL-USDT$0.9996
0.0003012 Eth
$160,705,514.00
826,563.641 SOL
0.0000%
43
Binance
PENGU-USDT$0.9996
0.0003012 Eth
$150,223,644.00
4,278,709,623.000 PENGU
0.0213%
44
Bybit
MNT-USDT$0.9996
0.0003012 Eth
$143,033,949.00
118,590,698.810 MNT
0.0006%
45
Bybit
DOGE-USDT$0.9996
0.0003012 Eth
$138,678,036.00
409,318,111.400 DOGE
0.0020%
46
Gate.io
XRP-USDT$0.9995
0.0003011 Eth
$137,028,551.00
59,120,966.094 XRP
0.0003%
47
Hibt
BTC-USDT$0.9995
0.0003011 Eth
$132,031,551.00
1,397.693 BTC
0.0000%
48
HTX
ETH-USDT$0.9995
0.0003011 Eth
$129,709,065.00
39,019.183 ETH
0.0000%
49
Deepcoin
SOL-USDT$0.9997
0.0003046 Eth
$126,023,104.00
662,895.531 SOL
0.0000%
50
OKX
XRP-USDT$0.9996
0.0003012 Eth
$123,239,259.00
53,075,122.675 XRP
0.0003%
51
Binance
HBAR-USDT$1.00
0.0003044 Eth
$121,713,839.00
436,463,229.000 HBAR
0.0022%
52
HTX
DOGE-USDT$0.9995
0.0003011 Eth
$115,251,294.00
337,651,822.635 DOGE
0.0017%
53
Binance
ACT-USDT$0.9996
0.0003012 Eth
$112,602,671.00
370,356,351.600 ACT
0.0018%
54
WEEX
SOL-USDT$0.9999
0.0003044 Eth
$111,472,671.00
571,313.100 SOL
0.0000%
55
Bybit
SONIC-USDT$0.9996
0.0003012 Eth
$96,435,339.00
112,027,075.300 SONIC
0.0006%
56
KuCoin
XRP-USDT$0.9996
0.0003012 Eth
$95,056,891.00
40,861,879.748 XRP
0.0002%
57
Binance
AVAX-USDT$0.9997
0.0003047 Eth
$93,674,130.00
2,498,225.510 AVAX
0.0000%
58
Binance
USUAL-USDT$0.9997
0.0003047 Eth
$93,653,459.00
131,593,476.500 USUAL
0.0007%
59
DigiFinex
TRX-USDT$0.9996
0.0003012 Eth
$91,902,669.00
375,539,119.400 TRX
0.0019%
60
OKX
SUI-USDT$0.9996
0.0003012 Eth
$91,013,698.00
19,493,079.190 SUI
0.0001%
61
Bitget
X-USDT$0.9996
0.0003012 Eth
$89,498,009.00
642,548,846,181.300 X
3.2002%
62
Binance
PNUT-USDT$0.9996
0.0003012 Eth
$89,359,688.00
158,620,108.100 PNUT
0.0008%
63
Binance
NEIRO-USDT$0.9993
0.0003042 Eth
$88,740,587.00
111,062,093,398.000 NEIRO
0.5531%
64
DigiFinex
DOGE-USDT$0.9996
0.0003012 Eth
$84,935,178.00
253,759,578.140 DOGE
0.0013%
65
Binance
GAS-USDT$0.9993
0.0003041 Eth
$84,888,383.00
15,141,530.400 GAS
0.0001%
66
KuCoin
SOL-USDT$0.9996
0.0003012 Eth
$84,365,925.00
439,868.758 SOL
0.0000%
67
Binance
BIO-USDT$0.9996
0.0003012 Eth
$80,812,539.00
140,722,431.600 BIO
0.0007%
68
BingX
BTC-USDT$0.9996
0.0003012 Eth
$78,714,110.00
831.917 BTC
0.0000%
69
Toobit
XRP-USDT$0.9995
0.0003016 Eth
$77,174,050.00
33,288,364.000 XRP
0.0002%
70
Gate.io
SOL-USDT$0.9995
0.0003011 Eth
$76,509,370.00
392,458.118 SOL
0.0000%
71
Bitunix
XRP-USDT$0.9995
0.0003010 Eth
$69,412,324.00
29,839,543.000 XRP
0.0001%
72
Binance
DOT-USDT$1.00
0.0003040 Eth
$69,133,747.00
10,264,977.030 DOT
0.0001%
73
Bybit
ADA-USDT$0.9996
0.0003012 Eth
$69,133,331.00
73,186,385.970 ADA
0.0004%
74
Binance
LTC-USDT$1.002
0.0003034 Eth
$66,170,045.00
653,405.708 LTC
0.0000%
75
LBank
SOL-USDT$0.9993
0.0003025 Eth
$65,899,421.00
343,221.011 SOL
0.0000%
76
BingX
ETH-USDT$0.9996
0.0003012 Eth
$65,237,910.00
19,647.862 ETH
0.0000%
77
Ourbit
XRP-USDT$1.00
0.0003019 Eth
$64,981,901.00
27,990,371.840 XRP
0.0001%
78
Binance
ARB-USDT$0.9996
0.0003012 Eth
$64,733,078.00
82,492,582.100 ARB
0.0004%
79
BTSE
XRP-USDT$0.9995
0.0003016 Eth
$63,420,686.00
27,257,640.644 XRP
0.0001%
80
Bitget
SUI-USDT$0.9996
0.0003012 Eth
$61,236,691.00
13,138,444.280 SUI
0.0001%
81
Binance
NEAR-USDT$0.9996
0.0003012 Eth
$59,430,921.00
11,710,346.700 NEAR
0.0001%
82
DigiFinex
SOL-USDT$0.9996
0.0003012 Eth
$57,157,033.00
298,105.770 SOL
0.0000%
83
Bitunix
SOL-USDT$0.9995
0.0003010 Eth
$56,900,787.00
296,944.303 SOL
0.0000%
84
Binance
FLOKI-USDT$0.9996
0.0003012 Eth
$53,595,039.00
320,154,282,664.000 FLOKI
1.5945%
85
BTSE
SOL-USDT$0.9995
0.0003016 Eth
$52,991,887.00
275,984.202 SOL
0.0000%
86
Binance
RENDER-USDT$0.9996
0.0003012 Eth
$51,986,446.00
6,917,441.050 RENDER
0.0000%
87
Bybit
PEPE-USDT$0.9996
0.0003012 Eth
$50,861,995.00
2,859,674,033,535.000 PEPE
14.2425%
88
Binance
FTM-USDT$0.9996
0.0003012 Eth
$45,909,698.00
69,201,219.000 FTM
0.0003%
89
Gate.io
HBAR-USDT$0.9995
0.0003011 Eth
$44,463,465.00
159,725,711.860 HBAR
0.0008%
90
LBank
ADA-USDT$0.9996
0.0003012 Eth
$43,417,241.00
47,083,422.900 ADA
0.0002%
91
Azbit
XRP-USDT$0.9996
0.0003047 Eth
$43,412,673.00
18,726,974.300 XRP
0.0001%
92
CoinW
DOGE-USDT$0.9995
0.0003016 Eth
$43,226,846.00
128,941,188.449 DOGE
0.0006%
93
DigiFinex
XRP-USDT$0.9996
0.0003012 Eth
$42,994,639.00
18,483,671.000 XRP
0.0001%
94
OKX
ADA-USDT$0.9996
0.0003012 Eth
$41,759,454.00
44,058,790.813 ADA
0.0002%
95
Bybit
APEX-USDT$0.9996
0.0003012 Eth
$40,410,786.00
26,574,465.980 APEX
0.0001%
96
Gate.io
ADA-USDT$0.9995
0.0003011 Eth
$37,908,044.00
40,202,460.980 ADA
0.0002%
97
MEXC
USDC-USDT$0.9995
0.0003011 Eth
$35,554,937.00
35,551,953.240 USDC
0.0002%
98
Bitget
SOL-USDT$0.9996
0.0003012 Eth
$33,871,192.00
173,507.031 SOL
0.0000%
99
HTX
ADA-USDT$0.9995
0.0003011 Eth
$30,476,492.00
31,994,266.638 ADA
0.0002%
100
Kraken
BTC-USDT$0.9996
0.0003012 Eth
$27,457,155.00
294.226 BTC
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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