ETH Price: $3,318.35 (-5.03%)

Token

Tether USD (USDT)
 

Overview

Max Total Supply

76,926,220,145.483487 USDT

Holders

6,550,249 ( 0.037%)

Market

Price

$1.00 @ 0.000301 ETH (-0.11%)

Onchain Market Cap

$76,836,524,172.79

Circulating Supply Market Cap

$139,024,374,299.00

Other Info

Token Contract (WITH 6 Decimals)

Balance
0 USDT

Value
$0.00
0x8ab0a70331c44df023c473740ccff8a88f68288d
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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):$48,741,420,703.00
Market Capitalization:$139,024,374,299.00
Circulating Supply:139,427,879,732.00 USDT
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
OrangeX
BTC-USDT$0.9989
0.0003013 Eth
$2,422,407,153.00
25,061.097 BTC
0.0001%
2
Binance
BTC-USDT$0.9989
0.0003011 Eth
$2,081,244,449.00
21,528.018 BTC
0.0001%
3
FameEX
BTC-USDT$0.9988
0.0003010 Eth
$1,699,982,152.00
17,585.890 BTC
0.0001%
4
Pionex
BTC-USDT$0.9988
0.0003010 Eth
$1,693,325,690.00
17,516.556 BTC
0.0001%
5
WEEX
BTC-USDT$0.9998
0.0002994 Eth
$1,554,592,955.00
16,086.593 BTC
0.0001%
6
WhiteBIT
BTC-USDT$0.9996
0.0003016 Eth
$1,390,087,080.00
14,537.180 BTC
0.0001%
7
Ourbit
BTC-USDT$0.9988
0.0003016 Eth
$1,230,856,092.00
12,731.191 BTC
0.0001%
8
Toobit
BTC-USDT$0.9989
0.0002997 Eth
$1,199,418,521.00
12,399.320 BTC
0.0001%
9
Binance
ETH-USDT$0.9988
0.0003001 Eth
$997,737,988.00
295,149.220 ETH
0.0016%
10
OrangeX
ETH-USDT$0.9989
0.0003013 Eth
$965,449,992.00
285,550.387 ETH
0.0016%
11
AscendEX (BitMax)
BTC-USDT$0.9989
0.0003011 Eth
$933,548,470.00
9,767.088 BTC
0.0001%
12
Binance
USDC-USDT$0.9989
0.0003011 Eth
$849,364,445.00
849,483,758.000 USDC
4.6305%
13
Pionex
ETH-USDT$0.9988
0.0003010 Eth
$793,942,290.00
234,999.917 ETH
0.0013%
14
MEXC
BTC-USDT$0.9989
0.0003000 Eth
$718,751,442.00
7,524.163 BTC
0.0000%
15
OKX
BTC-USDT$0.9989
0.0003011 Eth
$715,285,006.00
7,400.772 BTC
0.0000%
16
BitMart
BTC-USDT$0.9986
0.0003010 Eth
$712,882,416.00
7,476.350 BTC
0.0000%
17
CoinW
BTC-USDT$0.9988
0.0003010 Eth
$703,356,751.00
7,363.847 BTC
0.0000%
18
Binance
FDUSD-USDT$0.9989
0.0003011 Eth
$700,780,717.00
699,879,322.000 FDUSD
3.8150%
19
Bitget
BTC-USDT$0.9989
0.0003011 Eth
$686,930,682.00
7,106.191 BTC
0.0000%
20
Bybit
ETH-USDT$0.9989
0.0003011 Eth
$666,781,456.00
197,601.788 ETH
0.0011%
21
Bitget
ETH-USDT$0.9989
0.0003011 Eth
$546,302,027.00
161,682.663 ETH
0.0009%
22
DigiFinex
BTC-USDT$0.9988
0.0003010 Eth
$526,833,383.00
5,514.323 BTC
0.0000%
23
AscendEX (BitMax)
ETH-USDT$0.9989
0.0003011 Eth
$503,675,181.00
151,740.309 ETH
0.0008%
24
MEXC
ETH-USDT$0.999
0.0003015 Eth
$497,544,172.00
150,198.343 ETH
0.0008%
25
P2B
BTC-USDT$0.9988
0.0003010 Eth
$487,153,183.00
5,097.974 BTC
0.0000%
26
BVOX
ETH-USDT$0.9988
0.0003016 Eth
$471,464,400.00
139,532.236 ETH
0.0008%
27
Hotcoin
BTC-USDT$0.9986
0.0003010 Eth
$470,287,009.00
4,924.263 BTC
0.0000%
28
HTX
BTC-USDT$0.9989
0.0003011 Eth
$461,987,860.00
4,772.813 BTC
0.0000%
29
OKX
ETH-USDT$0.9989
0.0003010 Eth
$450,975,373.00
133,389.478 ETH
0.0007%
30
Ourbit
ETH-USDT$0.9996
0.0003012 Eth
$415,408,664.00
122,899.399 ETH
0.0007%
31
Bitunix
BTC-USDT$0.9988
0.0003016 Eth
$398,266,168.00
4,169.023 BTC
0.0000%
32
LBank
BTC-USDT$0.9989
0.0002991 Eth
$394,145,412.00
4,114.109 BTC
0.0000%
33
Binance
SOL-USDT$0.9989
0.0003010 Eth
$390,068,118.00
2,035,924.413 SOL
0.0111%
34
Binance
DOGE-USDT$0.9972
0.0003004 Eth
$366,175,040.00
1,147,548,880.000 DOGE
6.2552%
35
Gate.io
BTC-USDT$0.9989
0.0003010 Eth
$364,906,305.00
3,782.974 BTC
0.0000%
36
BitMart
ETH-USDT$0.9986
0.0003010 Eth
$363,127,788.00
109,814.852 ETH
0.0006%
37
XT.COM
BTC-USDT$0.9989
0.0003010 Eth
$308,615,040.00
3,192.109 BTC
0.0000%
38
Binance
PENGU-USDT$0.9989
0.0003011 Eth
$306,660,148.00
7,818,727,153.000 PENGU
42.6194%
39
LATOKEN
BTC-USDT$0.9989
0.0003010 Eth
$275,322,843.00
2,883.205 BTC
0.0000%
40
Binance
BNB-USDT$0.9988
0.0003010 Eth
$265,002,001.00
379,828.933 BNB
0.0021%
41
BigONE
BTC-USDT$0.9989
0.0003010 Eth
$236,683,849.00
2,478.616 BTC
0.0000%
42
Bybit
XRP-USDT$0.9989
0.0003011 Eth
$232,312,018.00
105,868,048.310 XRP
0.5771%
43
Biconomy.com
BTC-USDT$0.9989
0.0003010 Eth
$216,806,630.00
2,243.898 BTC
0.0000%
44
Binance
SUI-USDT$0.9987
0.0003014 Eth
$211,281,897.00
49,218,401.400 SUI
0.2683%
45
Binance
MOVE-USDT$0.9989
0.0003011 Eth
$199,183,335.00
175,624,135.400 MOVE
0.9573%
46
Binance
ZEN-USDT$0.9988
0.0003010 Eth
$198,117,985.00
5,311,971.990 ZEN
0.0290%
47
WEEX
XRP-USDT$0.9985
0.0002993 Eth
$189,537,845.00
86,487,891.265 XRP
0.4714%
48
OKX
DOGE-USDT$0.9989
0.0003010 Eth
$185,807,431.00
580,389,551.183 DOGE
3.1637%
49
Bybit
USDC-USDT$0.9989
0.0003011 Eth
$178,880,286.00
178,900,101.470 USDC
0.9752%
50
Gate.io
ETH-USDT$0.9989
0.0003010 Eth
$176,533,782.00
52,240.492 ETH
0.0003%
51
LBank
ETH-USDT$0.9996
0.0003013 Eth
$170,041,631.00
51,199.560 ETH
0.0003%
52
Bybit
SOL-USDT$0.9989
0.0003011 Eth
$169,316,021.00
885,003.551 SOL
0.0048%
53
Binance
TRX-USDT$0.9988
0.0003010 Eth
$168,614,349.00
666,452,592.000 TRX
3.6328%
54
Bitget
XRP-USDT$0.9989
0.0003011 Eth
$167,827,607.00
76,438,279.576 XRP
0.4167%
55
DigiFinex
ETH-USDT$0.9988
0.0003010 Eth
$166,281,352.00
50,096.461 ETH
0.0003%
56
Bitunix
ETH-USDT$0.9988
0.0003016 Eth
$164,703,096.00
49,699.652 ETH
0.0003%
57
KuCoin
ETH-USDT$0.9989
0.0003010 Eth
$159,533,558.00
48,056.621 ETH
0.0003%
58
Coinstore
ETH-USDT$0.9989
0.0003010 Eth
$158,371,926.00
46,873.165 ETH
0.0003%
59
Binance
HBAR-USDT$0.9988
0.0002994 Eth
$152,888,712.00
516,376,281.000 HBAR
2.8147%
60
CoinW
XRP-USDT$0.9988
0.0003010 Eth
$149,103,731.00
69,382,498.800 XRP
0.3782%
61
Coinstore
BTC-USDT$0.9989
0.0003010 Eth
$148,687,824.00
1,537.754 BTC
0.0000%
62
LATOKEN
ETH-USDT$0.9996
0.0003012 Eth
$147,138,132.00
44,351.826 ETH
0.0002%
63
WhiteBIT
XRP-USDT$0.9989
0.0002994 Eth
$138,375,181.00
64,052,226.490 XRP
0.3491%
64
Binance
VANA-USDT$0.9989
0.0003011 Eth
$136,313,218.00
6,551,104.760 VANA
0.0357%
65
Hotcoin
ETH-USDT$0.9989
0.0003016 Eth
$132,826,267.00
40,141.476 ETH
0.0002%
66
MEXC
DOGE-USDT$0.9989
0.0003010 Eth
$129,790,964.00
418,364,579.400 DOGE
2.2805%
67
HTX
DOGE-USDT$0.9989
0.0003011 Eth
$117,099,913.00
366,543,192.428 DOGE
1.9980%
68
WhiteBIT
DOGE-USDT$0.9989
0.0002994 Eth
$115,424,233.00
369,748,189.700 DOGE
2.0155%
69
Binance
ADA-USDT$0.9988
0.0003010 Eth
$114,498,788.00
130,517,748.900 ADA
0.7114%
70
BTSE
ETH-USDT$0.9989
0.0003001 Eth
$112,873,810.00
33,915.811 ETH
0.0002%
71
Bybit
MNT-USDT$0.9989
0.0003011 Eth
$111,613,548.00
93,609,231.260 MNT
0.5103%
72
Binance
ENA-USDT$0.9989
0.0003011 Eth
$110,211,418.00
115,327,391.010 ENA
0.6286%
73
Bybit
VANA-USDT$0.9989
0.0003011 Eth
$108,049,365.00
5,249,128.290 VANA
0.0286%
74
Hibt
BTC-USDT$0.9998
0.0002994 Eth
$103,851,860.00
1,072.893 BTC
0.0000%
75
OKX
SOL-USDT$0.9989
0.0003010 Eth
$103,332,972.00
540,754.119 SOL
0.0029%
76
Bitget
DOGE-USDT$0.9989
0.0003011 Eth
$95,486,259.00
298,514,805.602 DOGE
1.6272%
77
OKX
PENGU-USDT$0.9989
0.0003010 Eth
$88,938,838.00
2,261,157,167.000 PENGU
12.3254%
78
Bitget
SOL-USDT$0.9989
0.0003011 Eth
$87,917,070.00
459,115.138 SOL
0.0025%
79
HTX
ETH-USDT$0.9989
0.0003011 Eth
$86,683,892.00
25,520.098 ETH
0.0001%
80
LBank
DOGE-USDT$0.9989
0.0003013 Eth
$86,037,340.00
277,585,052.000 DOGE
1.5131%
81
BYDFi
BTC-USDT$0.999
0.0003015 Eth
$85,567,577.00
897.342 BTC
0.0000%
82
Gate.io
XRP-USDT$0.9989
0.0003010 Eth
$83,004,553.00
37,845,813.622 XRP
0.2063%
83
Binance
AAVE-USDT$0.9996
0.0003015 Eth
$77,804,981.00
224,989.131 AAVE
0.0012%
84
Dex-Trade
BTC-USDT$1.00
0.0002994 Eth
$75,613,112.00
788.995 BTC
0.0000%
85
OKX
XRP-USDT$0.9989
0.0003010 Eth
$75,367,594.00
34,387,370.393 XRP
0.1874%
86
DigiFinex
TRX-USDT$0.9988
0.0003010 Eth
$74,712,769.00
295,327,268.900 TRX
1.6098%
87
BingX
BTC-USDT$0.9989
0.0003011 Eth
$74,229,824.00
767.247 BTC
0.0000%
88
MEXC
SOL-USDT$0.9989
0.0003000 Eth
$73,236,957.00
389,146.600 SOL
0.0021%
89
Binance
PNUT-USDT$0.9989
0.0003011 Eth
$66,432,682.00
100,114,510.200 PNUT
0.5457%
90
CoinW
DOGE-USDT$0.9988
0.0003016 Eth
$64,053,462.00
206,411,547.070 DOGE
1.1251%
91
CoinEx
BTC-USDT$0.9989
0.0003011 Eth
$62,580,625.00
647.328 BTC
0.0000%
92
Azbit
BTC-USDT$0.9989
0.0003010 Eth
$62,351,618.00
644.968 BTC
0.0000%
93
Binance
FTM-USDT$0.9988
0.0003010 Eth
$59,344,284.00
65,355,027.000 FTM
0.3562%
94
Bitget
SUI-USDT$0.9989
0.0003011 Eth
$58,680,929.00
13,590,470.670 SUI
0.0741%
95
Hibt
ETH-USDT$0.999
0.0003014 Eth
$58,515,008.00
17,301.908 ETH
0.0001%
96
Bitget
USDC-USDT$0.9989
0.0003011 Eth
$50,199,316.00
50,203,719.310 USDC
0.2737%
97
KuCoin
SOL-USDT$0.9989
0.0003010 Eth
$49,155,022.00
262,378.241 SOL
0.0014%
98
BingX
ETH-USDT$0.9989
0.0003011 Eth
$48,978,763.00
14,497.190 ETH
0.0001%
99
WhiteBIT
ADA-USDT$0.9989
0.0003010 Eth
$45,969,004.00
53,772,340.720 ADA
0.2931%
100
WhiteBIT
CRV-USDT$0.9989
0.0002991 Eth
$44,701,602.00
47,269,740.376 CRV
0.2577%

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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