ETH Price: $3,358.61 (-0.26%)

Token

Tether USD (USDT)
 

Overview

Max Total Supply

76,926,220,145.483487 USDT

Holders

6,531,724 ( -0.087%)

Market

Price

$1.00 @ 0.000297 ETH (-0.06%)

Onchain Market Cap

$76,744,674,265.94

Circulating Supply Market Cap

$138,637,472,528.00

Other Info

Token Contract (WITH 6 Decimals)

Balance
0 USDT

Value
$0.00
0xe4b11463f334cdd5ed20d005b981432246846d93
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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):$43,328,164,313.00
Market Capitalization:$138,637,472,528.00
Circulating Supply:139,005,076,767.00 USDT
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
Bybit
BTC-USDT$0.9988
0.0002975 Eth
$1,259,392,431.00
13,274.955 BTC
0.0000%
2
AscendEX (BitMax)
BTC-USDT$0.9983
0.0002976 Eth
$927,816,409.00
9,862.244 BTC
0.0000%
3
OrangeX
BTC-USDT$0.9982
0.0002976 Eth
$920,142,780.00
9,707.638 BTC
0.0000%
4
Binance
BTC-USDT$0.9981
0.0002973 Eth
$794,345,601.00
8,383.491 BTC
0.0000%
5
BVOX
BTC-USDT$0.9982
0.0002976 Eth
$653,980,516.00
6,899.795 BTC
0.0000%
6
FameEX
BTC-USDT$0.9982
0.0002976 Eth
$649,251,225.00
6,850.603 BTC
0.0000%
7
OrangeX
ETH-USDT$0.9982
0.0002976 Eth
$590,685,387.00
174,440.345 ETH
0.0000%
8
WhiteBIT
BTC-USDT$0.9985
0.0002972 Eth
$575,529,974.00
6,116.140 BTC
0.0000%
9
Bitget
BGB-USDT$0.9988
0.0002975 Eth
$571,261,953.00
82,738,689.595 BGB
0.0009%
10
Binance
ETH-USDT$0.9988
0.0002975 Eth
$531,024,273.00
156,743.734 ETH
0.0000%
11
AscendEX (BitMax)
ETH-USDT$0.9983
0.0002976 Eth
$505,132,196.00
150,613.724 ETH
0.0000%
12
Pionex
ETH-USDT$0.9986
0.0002970 Eth
$504,109,621.00
148,798.362 ETH
0.0000%
13
MEXC
BTC-USDT$0.9982
0.0002976 Eth
$487,712,350.00
5,184.917 BTC
0.0000%
14
Toobit
BTC-USDT$0.9982
0.0002976 Eth
$480,098,176.00
5,064.677 BTC
0.0000%
15
Tapbit
ETH-USDT$0.9983
0.0002976 Eth
$425,220,397.00
125,550.508 ETH
0.0000%
16
FameEX
ETH-USDT$0.9982
0.0002976 Eth
$396,931,908.00
117,228.619 ETH
0.0000%
17
Toobit
ETH-USDT$0.9982
0.0002976 Eth
$362,118,666.00
106,933.093 ETH
0.0000%
18
CoinW
BTC-USDT$0.9985
0.0002976 Eth
$347,487,132.00
3,693.849 BTC
0.0000%
19
Binance
SOL-USDT$0.9974
0.0002962 Eth
$325,073,893.00
1,677,989.856 SOL
0.0000%
20
Bybit
ETH-USDT$0.9988
0.0002975 Eth
$297,012,257.00
87,661.796 ETH
0.0000%
21
WhiteBIT
ETH-USDT$0.9985
0.0002972 Eth
$274,078,270.00
81,630.665 ETH
0.0000%
22
MEXC
ETH-USDT$0.9982
0.0002976 Eth
$266,258,326.00
79,394.032 ETH
0.0000%
23
OKX
BTC-USDT$0.9981
0.0002973 Eth
$252,552,479.00
2,663.650 BTC
0.0000%
24
WEEX
ETH-USDT$0.9986
0.0002970 Eth
$248,627,895.00
73,418.514 ETH
0.0000%
25
Bitget
BTC-USDT$0.9988
0.0002975 Eth
$243,582,021.00
2,567.297 BTC
0.0000%
26
Bitget
ETH-USDT$0.9988
0.0002975 Eth
$227,699,105.00
67,199.820 ETH
0.0000%
27
Binance
DOGE-USDT$0.9986
0.0002976 Eth
$216,572,873.00
669,330,522.000 DOGE
0.0075%
28
CoinW
ETH-USDT$0.9983
0.0002976 Eth
$208,928,371.00
62,207.323 ETH
0.0000%
29
Binance
BNB-USDT$0.9984
0.0002975 Eth
$204,895,896.00
284,840.649 BNB
0.0000%
30
Binance
XRP-USDT$0.9988
0.0002975 Eth
$201,042,482.00
92,174,563.000 XRP
0.0010%
31
DigiFinex
BTC-USDT$0.9988
0.0002975 Eth
$199,461,552.00
2,116.598 BTC
0.0000%
32
BitMart
BTC-USDT$0.9983
0.0002976 Eth
$198,636,920.00
2,111.032 BTC
0.0000%
33
Coinbase Exchange
USDT-USD$0.9984
0.0002974 Eth
$192,542,074.00
192,852,566.670 USDT
0.0022%
34
OKX
ETH-USDT$0.9983
0.0002976 Eth
$177,249,731.00
52,349.440 ETH
0.0000%
35
Binance
PEPE-USDT$0.9986
0.0002973 Eth
$165,256,547.00
8,843,007,189,892.000 PEPE
99.4355%
36
HTX
BTC-USDT$0.9983
0.0002976 Eth
$155,917,128.00
1,644.837 BTC
0.0000%
37
BitMart
ETH-USDT$0.9983
0.0002976 Eth
$155,428,617.00
46,329.831 ETH
0.0000%
38
Bitunix
BTC-USDT$0.9983
0.0002976 Eth
$148,736,093.00
1,580.699 BTC
0.0000%
39
Bybit
SOL-USDT$0.9988
0.0002975 Eth
$147,551,097.00
760,352.254 SOL
0.0000%
40
Binance
HBAR-USDT$0.9988
0.0002975 Eth
$147,208,563.00
506,315,307.000 HBAR
0.0057%
41
BTSE
BTC-USDT$0.9983
0.0002976 Eth
$132,050,547.00
1,402.005 BTC
0.0000%
42
Gate.io
ETH-USDT$0.9983
0.0002976 Eth
$130,169,074.00
38,431.467 ETH
0.0000%
43
Binance
PHA-USDT$0.9985
0.0002976 Eth
$124,693,004.00
271,374,417.000 PHA
0.0031%
44
LBank
ETH-USDT$0.9984
0.0002976 Eth
$120,543,198.00
35,976.827 ETH
0.0000%
45
Coinstore
ETH-USDT$0.9985
0.0002972 Eth
$119,836,986.00
35,375.213 ETH
0.0000%
46
OKX
DOGE-USDT$0.9983
0.0002976 Eth
$116,778,833.00
360,996,549.516 DOGE
0.0041%
47
Binance
SUI-USDT$0.9982
0.0002970 Eth
$109,209,745.00
26,092,349.700 SUI
0.0003%
48
Binance
TRX-USDT$0.9986
0.0002973 Eth
$102,112,212.00
393,982,956.100 TRX
0.0044%
49
Binance
THE-USDT$0.9986
0.0002973 Eth
$100,994,228.00
61,613,180.600 THE
0.0007%
50
Tapbit
BTC-USDT$0.9983
0.0002976 Eth
$99,620,923.00
1,050.992 BTC
0.0000%
51
WhiteBIT
SOL-USDT$0.9983
0.0002975 Eth
$98,575,123.00
511,221.081 SOL
0.0000%
52
Binance
XVG-USDT$0.9986
0.0002973 Eth
$98,336,043.00
6,659,013,353.000 XVG
0.0749%
53
LATOKEN
BTC-USDT$0.9983
0.0002976 Eth
$97,921,042.00
1,040.710 BTC
0.0000%
54
BigONE
BTC-USDT$0.9984
0.0002976 Eth
$90,900,777.00
966.282 BTC
0.0000%
55
DigiFinex
ETH-USDT$0.9988
0.0002975 Eth
$88,383,034.00
26,298.341 ETH
0.0000%
56
KuCoin
ETH-USDT$0.9983
0.0002976 Eth
$87,783,316.00
26,140.128 ETH
0.0000%
57
Coinstore
BTC-USDT$0.9985
0.0002972 Eth
$85,739,781.00
904.296 BTC
0.0000%
58
Biconomy.com
ETH-USDT$0.9983
0.0002975 Eth
$85,414,544.00
25,217.239 ETH
0.0000%
59
Bitunix
ETH-USDT$0.9982
0.0002976 Eth
$82,953,591.00
24,743.347 ETH
0.0000%
60
KuCoin
BTC-USDT$0.9983
0.0002976 Eth
$81,510,614.00
865.390 BTC
0.0000%
61
Bybit
XRP-USDT$0.9988
0.0002975 Eth
$81,276,262.00
37,276,695.770 XRP
0.0004%
62
OKX
SOL-USDT$0.9983
0.0002976 Eth
$79,260,448.00
408,654.345 SOL
0.0000%
63
Binance
ZEN-USDT$0.9985
0.0002972 Eth
$78,527,745.00
2,499,456.920 ZEN
0.0000%
64
LBank
DOGE-USDT$0.9984
0.0002976 Eth
$76,491,255.00
239,317,565.000 DOGE
0.0027%
65
Binance
ADA-USDT$1.00
0.0002975 Eth
$76,282,498.00
85,539,337.500 ADA
0.0010%
66
Binance
PENGU-USDT$0.9988
0.0002975 Eth
$75,872,165.00
2,131,975,627.000 PENGU
0.0240%
67
Binance
AAVE-USDT$0.9985
0.0002976 Eth
$75,557,075.00
220,566.890 AAVE
0.0000%
68
LATOKEN
ETH-USDT$0.9982
0.0002976 Eth
$73,737,204.00
21,987.287 ETH
0.0000%
69
WhiteBIT
SUI-USDT$0.9984
0.0002976 Eth
$72,244,886.00
17,403,761.468 SUI
0.0002%
70
WhiteBIT
DOGE-USDT$0.9983
0.0002975 Eth
$67,487,619.00
211,249,473.500 DOGE
0.0024%
71
HTX
DOGE-USDT$0.9983
0.0002976 Eth
$66,528,795.00
205,594,206.514 DOGE
0.0023%
72
WhiteBIT
XRP-USDT$0.9983
0.0002976 Eth
$66,413,407.00
30,840,918.600 XRP
0.0003%
73
MEXC
DOGE-USDT$0.9982
0.0002976 Eth
$66,386,791.00
207,917,667.800 DOGE
0.0023%
74
Bitget
DOGE-USDT$0.9988
0.0002975 Eth
$66,320,035.00
204,914,360.215 DOGE
0.0023%
75
Binance
CRV-USDT$0.9988
0.0002975 Eth
$66,213,711.00
66,294,838.400 CRV
0.0007%
76
Kraken
USDT-USD$0.9984
0.0002974 Eth
$65,750,302.00
65,856,990.640 USDT
0.0007%
77
BTSE
ETH-USDT$0.9985
0.0002971 Eth
$64,673,110.00
19,276.296 ETH
0.0000%
78
Binance
ENA-USDT$0.9988
0.0002975 Eth
$64,600,601.00
68,489,994.180 ENA
0.0008%
79
MEXC
SOL-USDT$0.9982
0.0002976 Eth
$64,399,131.00
334,110.310 SOL
0.0000%
80
Binance
FTM-USDT$0.9985
0.0002972 Eth
$59,980,934.00
75,428,285.000 FTM
0.0008%
81
Hotcoin
ETH-USDT$0.9982
0.0002976 Eth
$58,222,666.00
17,356.493 ETH
0.0000%
82
Binance
MOVE-USDT$0.9986
0.0002973 Eth
$55,872,592.00
55,652,362.500 MOVE
0.0006%
83
Binance
VANA-USDT$0.9988
0.0002975 Eth
$51,409,167.00
2,701,643.970 VANA
0.0000%
84
BingX
BTC-USDT$0.9981
0.0002973 Eth
$50,080,949.00
528.133 BTC
0.0000%
85
HTX
ETH-USDT$0.9983
0.0002976 Eth
$49,399,997.00
14,594.869 ETH
0.0000%
86
Bybit
DOGE-USDT$0.9988
0.0002975 Eth
$48,740,069.00
150,602,701.700 DOGE
0.0017%
87
DigiFinex
TRX-USDT$0.9988
0.0002975 Eth
$48,163,068.00
185,566,598.500 TRX
0.0021%
88
WhiteBIT
ZEN-USDT$0.9982
0.0002976 Eth
$45,513,949.00
1,490,436.555 ZEN
0.0000%
89
CoinW
DOGE-USDT$0.9983
0.0002976 Eth
$45,029,230.00
141,110,389.328 DOGE
0.0016%
90
Binance
RSR-USDT$0.9985
0.0002976 Eth
$44,287,387.00
2,956,942,759.600 RSR
0.0332%
91
KuCoin
XRP-USDT$0.9983
0.0002976 Eth
$43,393,997.00
20,152,360.055 XRP
0.0002%
92
Bybit
MNT-USDT$0.9988
0.0002975 Eth
$43,227,593.00
35,731,343.030 MNT
0.0004%
93
Bybit
VIRTUAL-USDT$0.9988
0.0002975 Eth
$40,887,093.00
11,696,610.000 VIRTUAL
0.0001%
94
DigiFinex
DOGE-USDT$0.9988
0.0002975 Eth
$37,771,784.00
117,983,355.360 DOGE
0.0013%
95
KuCoin
SOL-USDT$0.9983
0.0002976 Eth
$36,420,402.00
188,597.272 SOL
0.0000%
96
Binance
LTC-USDT$0.9982
0.0002975 Eth
$34,205,363.00
341,046.601 LTC
0.0000%
97
Binance
NEIRO-USDT$0.9988
0.0002975 Eth
$32,152,865.00
33,546,583,011.000 NEIRO
0.3772%
98
CoinEx
BTC-USDT$0.9983
0.0002976 Eth
$30,003,088.00
316.329 BTC
0.0000%
99
BingX
ETH-USDT$0.9981
0.0002973 Eth
$28,319,191.00
8,363.059 ETH
0.0000%
100
WhiteBIT
AAVE-USDT$0.9983
0.0002976 Eth
$23,175,210.00
68,955.450 AAVE
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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