ETH Price: $3,407.91 (+1.59%)
Gas: 5.92 Gwei

Token

Tether USD (USDT)
 

Overview

Max Total Supply

76,926,220,145.483487 USDT

Holders

6,547,193 ( -0.051%)

Market

Price

$1.00 @ 0.000293 ETH

Onchain Market Cap

$76,841,755,155.76

Circulating Supply Market Cap

$139,262,932,148.00

Other Info

Token Contract (WITH 6 Decimals)

Balance
1.124825 USDT

Value
$1.12 ( ~0.000328647068255477 Eth) [0.0000%]
0x9ee54e8ba329408ec0718694414f34febcfcf6f9
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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):$68,621,410,111.00
Market Capitalization:$139,262,932,148.00
Circulating Supply:139,440,581,307.00 USDT
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
OrangeX
BTC-USDT$0.9991
0.0002927 Eth
$2,379,629,770.00
24,812.612 BTC
0.0000%
2
Binance
BTC-USDT$0.9986
0.0002930 Eth
$2,092,189,791.00
21,822.932 BTC
0.0000%
3
BVOX
BTC-USDT$0.9986
0.0002929 Eth
$1,607,912,639.00
16,771.081 BTC
0.0000%
4
Toobit
BTC-USDT$0.9988
0.0002927 Eth
$1,197,995,287.00
12,493.178 BTC
0.0000%
5
Binance
ETH-USDT$0.9984
0.0002929 Eth
$1,145,899,065.00
341,278.534 ETH
0.0000%
6
OrangeX
ETH-USDT$0.999
0.0002931 Eth
$1,102,440,786.00
328,336.479 ETH
0.0000%
7
AscendEX (BitMax)
BTC-USDT$0.9986
0.0002930 Eth
$943,706,716.00
9,775.653 BTC
0.0000%
8
Tapbit
ETH-USDT$0.9986
0.0002929 Eth
$868,085,749.00
258,534.466 ETH
0.0000%
9
Pionex
ETH-USDT$0.9989
0.0002929 Eth
$861,847,197.00
256,772.135 ETH
0.0000%
10
FameEX
ETH-USDT$0.9989
0.0002928 Eth
$855,180,448.00
254,554.157 ETH
0.0000%
11
MEXC
ETH-USDT$0.9986
0.0002929 Eth
$825,800,194.00
242,463.630 ETH
0.0000%
12
CoinW
BTC-USDT$0.9988
0.0002929 Eth
$732,728,644.00
7,589.073 BTC
0.0000%
13
Bybit
ETH-USDT$0.9989
0.0002931 Eth
$676,207,420.00
201,535.760 ETH
0.0000%
14
OKX
BTC-USDT$0.9986
0.0002930 Eth
$675,240,243.00
7,041.680 BTC
0.0000%
15
WEEX
ETH-USDT$0.9988
0.0002929 Eth
$655,128,540.00
195,153.354 ETH
0.0000%
16
Binance
FDUSD-USDT$0.9989
0.0002929 Eth
$612,190,857.00
611,833,602.000 FDUSD
0.0042%
17
Binance
XRP-USDT$0.9984
0.0002929 Eth
$602,360,617.00
277,668,118.000 XRP
0.0019%
18
Bitget
ETH-USDT$0.9986
0.0002930 Eth
$530,586,951.00
158,051.380 ETH
0.0000%
19
DigiFinex
BTC-USDT$0.9986
0.0002930 Eth
$524,543,141.00
5,434.158 BTC
0.0000%
20
BVOX
ETH-USDT$0.9988
0.0002928 Eth
$522,924,696.00
155,699.614 ETH
0.0000%
21
AscendEX (BitMax)
ETH-USDT$0.9986
0.0002930 Eth
$521,732,200.00
153,164.188 ETH
0.0000%
22
P2B
BTC-USDT$0.9986
0.0002930 Eth
$481,001,009.00
4,982.930 BTC
0.0000%
23
Hotcoin
BTC-USDT$0.9988
0.0002928 Eth
$475,263,550.00
4,920.781 BTC
0.0000%
24
Ourbit
ETH-USDT$0.9988
0.0002928 Eth
$453,570,081.00
135,127.350 ETH
0.0000%
25
BitMart
ETH-USDT$0.9986
0.0002929 Eth
$435,247,837.00
127,807.962 ETH
0.0000%
26
OKX
ETH-USDT$0.9986
0.0002929 Eth
$431,136,186.00
128,383.810 ETH
0.0000%
27
LBank
BTC-USDT$0.9988
0.0002928 Eth
$405,072,744.00
4,193.794 BTC
0.0000%
28
Bitunix
BTC-USDT$0.9989
0.0002928 Eth
$398,765,209.00
4,127.723 BTC
0.0000%
29
HTX
BTC-USDT$0.9986
0.0002929 Eth
$375,729,509.00
3,917.751 BTC
0.0000%
30
Gate.io
BTC-USDT$0.9989
0.0002928 Eth
$318,089,590.00
3,317.344 BTC
0.0000%
31
LATOKEN
BTC-USDT$0.9988
0.0002928 Eth
$289,434,737.00
2,996.389 BTC
0.0000%
32
Binance
BNB-USDT$0.9986
0.0002930 Eth
$254,698,094.00
367,567.349 BNB
0.0000%
33
BTSE
BTC-USDT$0.9989
0.0002928 Eth
$250,167,182.00
2,590.000 BTC
0.0000%
34
Binance
PEPE-USDT$0.9986
0.0002930 Eth
$248,468,447.00
14,118,775,127,874.000 PEPE
96.8414%
35
Bybit
XRP-USDT$0.9989
0.0002931 Eth
$230,477,737.00
106,191,470.650 XRP
0.0007%
36
Binance
TRX-USDT$0.9986
0.0002930 Eth
$220,383,311.00
859,980,478.700 TRX
0.0059%
37
Biconomy.com
BTC-USDT$0.9989
0.0002931 Eth
$216,842,621.00
2,260.848 BTC
0.0000%
38
WEEX
XRP-USDT$0.9988
0.0002929 Eth
$214,150,669.00
98,649,473.987 XRP
0.0007%
39
Bybit
USDC-USDT$0.9989
0.0002931 Eth
$210,977,756.00
210,957,907.750 USDC
0.0014%
40
Binance
USUAL-USDT$0.9997
0.0002928 Eth
$208,041,065.00
173,027,318.200 USUAL
0.0012%
41
Binance
GMT-USDT$0.9986
0.0002930 Eth
$199,111,244.00
1,159,600,002.000 GMT
0.0080%
42
Binance
SUI-USDT$0.9987
0.0002927 Eth
$195,655,501.00
45,984,461.000 SUI
0.0003%
43
Gate.io
ETH-USDT$0.9989
0.0002928 Eth
$188,793,289.00
56,174.594 ETH
0.0000%
44
Bitunix
ETH-USDT$0.9989
0.0002928 Eth
$183,615,367.00
53,833.421 ETH
0.0000%
45
XT.COM
ETH-USDT$0.9991
0.0002927 Eth
$182,807,465.00
54,409.776 ETH
0.0000%
46
DigiFinex
ETH-USDT$0.9986
0.0002930 Eth
$182,794,967.00
53,658.300 ETH
0.0000%
47
KuCoin
BTC-USDT$0.9989
0.0002931 Eth
$175,405,971.00
1,816.423 BTC
0.0000%
48
KuCoin
ETH-USDT$0.9989
0.0002931 Eth
$172,900,478.00
50,733.968 ETH
0.0000%
49
Binance
PENGU-USDT$0.9986
0.0002930 Eth
$172,475,273.00
4,653,089,190.000 PENGU
0.0319%
50
OKX
DOGE-USDT$0.9986
0.0002929 Eth
$168,324,519.00
533,439,289.775 DOGE
0.0037%
51
LATOKEN
ETH-USDT$0.999
0.0002927 Eth
$167,645,318.00
49,117.202 ETH
0.0000%
52
MEXC
XRP-USDT$0.9988
0.0002928 Eth
$166,316,399.00
75,520,120.000 XRP
0.0005%
53
Coinstore
ETH-USDT$0.9988
0.0002927 Eth
$165,833,965.00
49,423.065 ETH
0.0000%
54
Bitget
XRP-USDT$0.9986
0.0002930 Eth
$164,594,230.00
75,848,145.291 XRP
0.0005%
55
Bybit
SOL-USDT$0.9989
0.0002931 Eth
$158,675,024.00
837,722.429 SOL
0.0000%
56
Binance
HBAR-USDT$0.9986
0.0002930 Eth
$144,174,410.00
501,328,978.000 HBAR
0.0034%
57
CoinW
XRP-USDT$0.9987
0.0002927 Eth
$136,080,883.00
61,717,643.200 XRP
0.0004%
58
Binance
ZEN-USDT$0.9992
0.0002926 Eth
$134,247,352.00
3,672,326.990 ZEN
0.0000%
59
Binance
MOVE-USDT$0.9989
0.0002930 Eth
$123,199,333.00
115,598,724.300 MOVE
0.0008%
60
Bybit
MNT-USDT$0.9989
0.0002931 Eth
$122,692,083.00
103,196,697.510 MNT
0.0007%
61
BTSE
ETH-USDT$0.9989
0.0002928 Eth
$116,504,783.00
34,167.702 ETH
0.0000%
62
Binance
ADA-USDT$0.9989
0.0002928 Eth
$115,910,446.00
132,480,675.400 ADA
0.0009%
63
Binance
ENA-USDT$0.9986
0.0002930 Eth
$115,207,993.00
122,056,040.090 ENA
0.0008%
64
HTX
DOGE-USDT$0.9986
0.0002929 Eth
$109,835,075.00
349,154,532.584 DOGE
0.0024%
65
Hibt
BTC-USDT$0.9988
0.0002928 Eth
$104,523,340.00
1,090.027 BTC
0.0000%
66
DigiFinex
TRX-USDT$0.9986
0.0002930 Eth
$100,209,067.00
380,929,841.100 TRX
0.0026%
67
OKX
SOL-USDT$0.9986
0.0002929 Eth
$95,732,778.00
505,586.022 SOL
0.0000%
68
Bybit
VANA-USDT$0.9989
0.0002931 Eth
$95,579,716.00
4,755,405.400 VANA
0.0000%
69
Binance
VANA-USDT$0.9986
0.0002930 Eth
$88,760,681.00
4,370,714.650 VANA
0.0000%
70
Gate.io
XRP-USDT$0.9989
0.0002928 Eth
$82,274,699.00
37,850,809.086 XRP
0.0003%
71
MEXC
SOL-USDT$0.9988
0.0002928 Eth
$77,446,397.00
406,109.870 SOL
0.0000%
72
Binance
AAVE-USDT$0.9989
0.0002930 Eth
$76,530,306.00
224,760.928 AAVE
0.0000%
73
Dex-Trade
BTC-USDT$0.9989
0.0002928 Eth
$75,250,622.00
779.075 BTC
0.0000%
74
HTX
ETH-USDT$0.9986
0.0002929 Eth
$74,436,916.00
22,159.969 ETH
0.0000%
75
Binance
UNI-USDT$0.9986
0.0002930 Eth
$73,282,344.00
5,404,199.480 UNI
0.0000%
76
OKX
XRP-USDT$0.9986
0.0002929 Eth
$72,917,883.00
33,631,150.083 XRP
0.0002%
77
Binance
CRV-USDT$0.9986
0.0002930 Eth
$72,502,864.00
75,823,149.200 CRV
0.0005%
78
WhiteBIT
HBAR-USDT$0.9989
0.0002926 Eth
$71,637,264.00
247,875,851.050 HBAR
0.0017%
79
BingX
BTC-USDT$0.9989
0.0002931 Eth
$71,001,328.00
740.140 BTC
0.0000%
80
Binance
FLOKI-USDT$0.9989
0.0002928 Eth
$70,497,174.00
400,425,854,070.000 FLOKI
2.7465%
81
MEXC
MX-USDT$0.9986
0.0002929 Eth
$69,134,042.00
19,478,855.770 MX
0.0001%
82
KuCoin
XRP-USDT$0.9989
0.0002931 Eth
$66,974,033.00
30,463,339.639 XRP
0.0002%
83
Binance
FTM-USDT$0.9986
0.0002930 Eth
$64,990,631.00
73,341,323.000 FTM
0.0005%
84
Azbit
BTC-USDT$0.9989
0.0002928 Eth
$62,725,636.00
654.035 BTC
0.0000%
85
OKX
MOVE-USDT$0.9986
0.0002929 Eth
$60,934,962.00
57,073,542.200 MOVE
0.0004%
86
Binance
PNUT-USDT$0.9986
0.0002930 Eth
$57,880,921.00
88,103,838.800 PNUT
0.0006%
87
Bybit
DOGE-USDT$0.9989
0.0002931 Eth
$57,091,042.00
181,152,474.600 DOGE
0.0012%
88
Hibt
ETH-USDT$0.9989
0.0002929 Eth
$55,905,379.00
16,644.235 ETH
0.0000%
89
DigiFinex
DOGE-USDT$0.9986
0.0002930 Eth
$55,850,544.00
175,055,030.900 DOGE
0.0012%
90
LBank
XRP-USDT$0.9988
0.0002927 Eth
$53,949,277.00
24,515,656.430 XRP
0.0002%
91
WhiteBIT
ADA-USDT$0.9988
0.0002928 Eth
$50,859,688.00
56,504,188.100 ADA
0.0004%
92
BingX
ETH-USDT$0.9988
0.0002928 Eth
$50,314,114.00
14,992.974 ETH
0.0000%
93
BTSE
XRP-USDT$0.999
0.0002929 Eth
$50,228,219.00
22,819,889.115 XRP
0.0002%
94
BVOX
TRX-USDT$0.9989
0.0002929 Eth
$50,200,558.00
196,500,917.800 TRX
0.0013%
95
OKX
SUI-USDT$0.9986
0.0002929 Eth
$49,294,453.00
11,567,390.179 SUI
0.0001%
96
WEEX
SUI-USDT$0.9988
0.0002929 Eth
$48,334,541.00
11,355,843.000 SUI
0.0001%
97
KuCoin
SOL-USDT$0.9989
0.0002931 Eth
$46,692,483.00
245,041.262 SOL
0.0000%
98
Binance
NEIRO-USDT$0.9986
0.0002930 Eth
$45,033,577.00
48,052,847,474.000 NEIRO
0.3296%
99
Bybit
SUI-USDT$0.9989
0.0002931 Eth
$41,186,574.00
9,681,903.110 SUI
0.0001%
100
PointPay
BTC-USDT$0.9988
0.0002929 Eth
$34,521,078.00
360.010 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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