ETH Price: $3,884.44 (-0.73%)

Token

Tether USD (USDT)
 

Overview

Max Total Supply

76,928,104,353.364467 USDT

Holders

6,552,139 (0.00%)

Market

Price

$1.00 @ 0.000257 ETH (-0.15%)

Onchain Market Cap

$76,860,946,118.26

Circulating Supply Market Cap

$140,184,159,306.00

Other Info

Token Contract (WITH 6 Decimals)

Balance
0.444457 USDT

Value
$0.44 ( ~0.000113272477662317 Eth) [0.0000%]
0x7a342a84b0ae8c852046b78d8d4d6c68483a9563
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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):$50,895,773,759.00
Market Capitalization:$140,184,159,306.00
Circulating Supply:140,253,672,849.00 USDT
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
MEXC
BTC-USDT$0.9997
0.0002572 Eth
$1,517,490,952.00
14,902.307 BTC
0.0000%
2
Binance
BTC-USDT$0.9997
0.0002574 Eth
$1,320,945,101.00
13,017.641 BTC
0.0000%
3
Pionex
BTC-USDT$0.9997
0.0002574 Eth
$1,177,369,171.00
11,601.204 BTC
0.0000%
4
CoinW
BTC-USDT$0.9997
0.0002574 Eth
$1,120,514,744.00
11,012.459 BTC
0.0000%
5
BVOX
BTC-USDT$0.9995
0.0002574 Eth
$1,044,523,360.00
10,295.846 BTC
0.0000%
6
Binance
FDUSD-USDT$0.9997
0.0002574 Eth
$1,033,599,104.00
1,031,613,494.000 FDUSD
0.0081%
7
MEXC
ETH-USDT$0.9997
0.0002572 Eth
$994,582,359.00
255,913.323 ETH
0.0000%
8
Binance
ETH-USDT$0.9999
0.0002573 Eth
$958,666,621.00
247,170.475 ETH
0.0000%
9
AscendEX (BitMax)
BTC-USDT$0.9997
0.0002574 Eth
$948,618,534.00
9,319.870 BTC
0.0000%
10
Pionex
ETH-USDT$0.9997
0.0002574 Eth
$903,984,037.00
233,011.038 ETH
0.0000%
11
Binance
XRP-USDT$0.9998
0.0002574 Eth
$813,291,927.00
334,213,008.000 XRP
0.0026%
12
Ourbit
BTC-USDT$0.9998
0.0002574 Eth
$784,371,608.00
7,729.043 BTC
0.0000%
13
Toobit
BTC-USDT$0.9997
0.0002574 Eth
$770,251,133.00
7,581.138 BTC
0.0000%
14
Tapbit
ETH-USDT$0.9997
0.0002574 Eth
$766,604,929.00
197,672.431 ETH
0.0000%
15
Bybit
ETH-USDT$0.9997
0.0002574 Eth
$678,212,018.00
174,718.534 ETH
0.0000%
16
Toobit
ETH-USDT$0.9995
0.0002572 Eth
$649,447,423.00
167,493.078 ETH
0.0000%
17
Binance
DOGE-USDT$0.9994
0.0002573 Eth
$541,196,865.00
1,360,189,258.000 DOGE
0.0107%
18
Bitget
ETH-USDT$0.9997
0.0002574 Eth
$536,903,525.00
138,391.459 ETH
0.0000%
19
DigiFinex
BTC-USDT$0.9997
0.0002574 Eth
$536,020,878.00
5,266.692 BTC
0.0000%
20
AscendEX (BitMax)
ETH-USDT$0.9997
0.0002574 Eth
$513,938,382.00
132,262.772 ETH
0.0000%
21
WhiteBIT
BTC-USDT$0.9995
0.0002574 Eth
$504,786,659.00
4,961.849 BTC
0.0000%
22
Binance
SOL-USDT$0.9997
0.0002574 Eth
$463,928,926.00
2,096,394.785 SOL
0.0000%
23
WEEX
BTC-USDT$0.9996
0.0002572 Eth
$451,249,768.00
4,451.104 BTC
0.0000%
24
BVOX
ETH-USDT$0.9997
0.0002572 Eth
$449,469,968.00
115,895.989 ETH
0.0000%
25
P2B
ETH-USDT$0.9997
0.0002572 Eth
$377,690,716.00
97,180.656 ETH
0.0000%
26
Azbit
BTC-USDT$0.9995
0.0002572 Eth
$376,803,466.00
3,713.396 BTC
0.0000%
27
DigiFinex
ETH-USDT$0.9997
0.0002574 Eth
$374,544,285.00
96,389.082 ETH
0.0000%
28
Deepcoin
ETH-USDT$0.9995
0.0002572 Eth
$364,168,731.00
98,412.759 ETH
0.0000%
29
OKX
ETH-USDT$0.9997
0.0002574 Eth
$347,379,791.00
89,638.129 ETH
0.0000%
30
Ourbit
ETH-USDT$0.9997
0.0002572 Eth
$345,165,571.00
88,958.943 ETH
0.0000%
31
Bitget
BTC-USDT$0.9997
0.0002574 Eth
$333,315,172.00
3,284.764 BTC
0.0000%
32
BitMart
BTC-USDT$0.9998
0.0002574 Eth
$333,301,698.00
3,272.886 BTC
0.0000%
33
OKX
BTC-USDT$0.9997
0.0002574 Eth
$306,476,650.00
3,019.794 BTC
0.0000%
34
XT.COM
BTC-USDT$0.9997
0.0002574 Eth
$298,932,370.00
2,945.916 BTC
0.0000%
35
KuCoin
XRP-USDT$0.9997
0.0002574 Eth
$286,360,967.00
118,265,706.612 XRP
0.0009%
36
Bitunix
BTC-USDT$0.9996
0.0002573 Eth
$283,658,302.00
2,785.659 BTC
0.0000%
37
BitMart
ETH-USDT$0.9998
0.0002574 Eth
$279,749,176.00
71,970.013 ETH
0.0000%
38
Binance
LINK-USDT$0.9999
0.0002573 Eth
$277,385,037.00
9,352,997.470 LINK
0.0001%
39
OKX
DOGE-USDT$0.9997
0.0002574 Eth
$272,218,322.00
683,197,010.437 DOGE
0.0054%
40
Hotcoin
BTC-USDT$0.9998
0.0002574 Eth
$268,771,365.00
2,641.239 BTC
0.0000%
41
XT.COM
ETH-USDT$0.9997
0.0002572 Eth
$266,097,882.00
68,621.932 ETH
0.0000%
42
Binance
PEPE-USDT$0.9997
0.0002574 Eth
$265,185,307.00
11,243,439,585,955.000 PEPE
88.5952%
43
LBank
BTC-USDT$0.9992
0.0002573 Eth
$264,316,941.00
2,595.722 BTC
0.0000%
44
Binance
FLOKI-USDT$0.9998
0.0002574 Eth
$227,499,537.00
950,622,802,653.000 FLOKI
7.4906%
45
Binance
SUI-USDT$0.9997
0.0002574 Eth
$222,316,386.00
48,890,902.800 SUI
0.0004%
46
Binance
ENA-USDT$0.9997
0.0002574 Eth
$217,601,802.00
200,967,847.930 ENA
0.0016%
47
Binance
BNB-USDT$0.9994
0.0002573 Eth
$213,630,902.00
297,659.768 BNB
0.0000%
48
Deepcoin
UXLINK-USDT$0.9997
0.0002574 Eth
$209,084,618.00
276,080,041.572 UXLINK
0.0022%
49
Bitget
XRP-USDT$0.9997
0.0002574 Eth
$203,053,461.00
83,464,334.506 XRP
0.0007%
50
Bybit
XRP-USDT$0.9997
0.0002574 Eth
$195,929,709.00
80,639,364.150 XRP
0.0006%
51
BTSE
BTC-USDT$0.9997
0.0002574 Eth
$190,644,114.00
1,873.662 BTC
0.0000%
52
Bitget
BGB-USDT$0.9997
0.0002574 Eth
$189,288,557.00
60,440,463.549 BGB
0.0005%
53
Binance
TRX-USDT$0.9995
0.0002574 Eth
$187,481,208.00
655,777,080.600 TRX
0.0052%
54
Biconomy.com
BTC-USDT$0.9997
0.0002572 Eth
$175,565,708.00
1,730.189 BTC
0.0000%
55
Tapbit
BTC-USDT$0.9997
0.0002572 Eth
$164,733,911.00
1,623.232 BTC
0.0000%
56
LBank
ETH-USDT$0.9997
0.0002572 Eth
$161,616,454.00
41,585.856 ETH
0.0000%
57
OKX
XRP-USDT$0.9997
0.0002574 Eth
$160,677,673.00
66,005,775.729 XRP
0.0005%
58
Gate.io
ETH-USDT$0.9997
0.0002574 Eth
$156,896,260.00
40,506.775 ETH
0.0000%
59
LATOKEN
BTC-USDT$0.9997
0.0002574 Eth
$156,590,855.00
1,538.710 BTC
0.0000%
60
Gate.io
BTC-USDT$0.9997
0.0002574 Eth
$155,549,955.00
1,532.949 BTC
0.0000%
61
Binance
AAVE-USDT$0.9997
0.0002573 Eth
$155,393,026.00
415,760.978 AAVE
0.0000%
62
Binance
ACT-USDT$0.9997
0.0002574 Eth
$151,292,831.00
254,568,054.200 ACT
0.0020%
63
LATOKEN
ETH-USDT$0.9998
0.0002573 Eth
$146,096,154.00
37,624.077 ETH
0.0000%
64
Binance
CRV-USDT$0.9995
0.0002574 Eth
$145,925,481.00
121,537,957.000 CRV
0.0010%
65
HTX
BTC-USDT$0.9997
0.0002574 Eth
$145,551,274.00
1,434.955 BTC
0.0000%
66
Bybit
SOL-USDT$0.9997
0.0002574 Eth
$145,527,701.00
658,216.817 SOL
0.0000%
67
Binance
ADA-USDT$0.9999
0.0002573 Eth
$145,286,205.00
134,365,835.100 ADA
0.0011%
68
Bitget
STETH-USDT$0.9997
0.0002574 Eth
$134,939,415.00
34,787.496 STETH
0.0000%
69
Bitget
DOGE-USDT$0.9997
0.0002574 Eth
$134,574,958.00
337,933,564.657 DOGE
0.0027%
70
Biconomy.com
ETH-USDT$0.9996
0.0002572 Eth
$129,866,715.00
33,475.519 ETH
0.0000%
71
BTSE
ETH-USDT$0.9996
0.0002572 Eth
$123,029,893.00
31,659.214 ETH
0.0000%
72
KuCoin
BTC-USDT$0.9997
0.0002574 Eth
$119,610,650.00
1,175.231 BTC
0.0000%
73
OKX
SOL-USDT$0.9997
0.0002574 Eth
$117,214,383.00
529,037.051 SOL
0.0000%
74
Binance
AVAX-USDT$0.9995
0.0002572 Eth
$115,661,117.00
2,257,404.070 AVAX
0.0000%
75
KuCoin
ETH-USDT$0.9997
0.0002574 Eth
$111,629,223.00
28,731.191 ETH
0.0000%
76
Binance
HBAR-USDT$0.9997
0.0002574 Eth
$111,392,974.00
374,651,909.000 HBAR
0.0030%
77
Bybit
STETH-USDT$0.9997
0.0002574 Eth
$108,416,750.00
27,945.524 STETH
0.0000%
78
Gate.io
FLOKI-USDT$0.9997
0.0002574 Eth
$107,841,730.00
447,374,356,942.000 FLOKI
3.5252%
79
MEXC
DOGE-USDT$0.9997
0.0002572 Eth
$102,845,749.00
257,426,826.940 DOGE
0.0020%
80
LBank
DOGE-USDT$0.9997
0.0002574 Eth
$101,118,927.00
253,342,282.000 DOGE
0.0020%
81
Bybit
MNT-USDT$0.9997
0.0002574 Eth
$98,917,417.00
80,424,342.180 MNT
0.0006%
82
Gate.io
ENA-USDT$0.9997
0.0002574 Eth
$98,095,787.00
91,811,977.640 ENA
0.0007%
83
BigONE
ETH-USDT$0.9993
0.0002573 Eth
$92,749,770.00
23,879.602 ETH
0.0000%
84
Binance
UNI-USDT$0.9997
0.0002574 Eth
$90,861,622.00
5,395,251.210 UNI
0.0000%
85
DigiFinex
DOGE-USDT$0.9997
0.0002574 Eth
$89,485,500.00
224,465,624.100 DOGE
0.0018%
86
Hotcoin
ETH-USDT$0.9998
0.0002574 Eth
$88,139,450.00
22,700.761 ETH
0.0000%
87
Bybit
DOGE-USDT$0.9997
0.0002574 Eth
$87,240,441.00
219,258,242.600 DOGE
0.0017%
88
Gate.io
DOGE-USDT$0.9997
0.0002574 Eth
$87,115,321.00
218,765,509.980 DOGE
0.0017%
89
DigiFinex
TRX-USDT$0.9997
0.0002574 Eth
$84,056,383.00
297,851,267.000 TRX
0.0023%
90
HTX
DOGE-USDT$0.9997
0.0002574 Eth
$80,960,498.00
203,028,971.578 DOGE
0.0016%
91
Binance
AVA-USDT$0.9997
0.0002574 Eth
$80,456,736.00
34,913,290.100 AVA
0.0003%
92
Toobit
XRP-USDT$0.9998
0.0002574 Eth
$80,455,017.00
33,047,804.000 XRP
0.0003%
93
Bitget
SOL-USDT$0.9997
0.0002574 Eth
$73,406,869.00
330,715.105 SOL
0.0000%
94
Binance
ARB-USDT$0.9997
0.0002574 Eth
$72,924,675.00
73,253,585.100 ARB
0.0006%
95
Binance
NEIRO-USDT$0.9998
0.0002574 Eth
$66,859,457.00
40,967,223,330.000 NEIRO
0.3228%
96
HTX
ETH-USDT$0.9997
0.0002574 Eth
$65,072,839.00
16,785.987 ETH
0.0000%
97
Gate.io
SUI-USDT$0.9995
0.0002574 Eth
$62,331,471.00
13,692,620.260 SUI
0.0001%
98
Deepcoin
DOGE-USDT$0.9997
0.0002574 Eth
$58,406,099.00
147,965,565.735 DOGE
0.0012%
99
BingX
ETH-USDT$0.9997
0.0002574 Eth
$45,653,348.00
11,764.400 ETH
0.0000%
100
BingX
BTC-USDT$0.9997
0.0002574 Eth
$38,880,505.00
383.080 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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