ETH Price: $3,181.42 (+3.08%)

Token

Tether USD (USDT)
 

Overview

Max Total Supply

64,929,452,093.657795 USDT

Holders

6,360,988 ( 0.038%)

Market

Price

$1.00 @ 0.000315 ETH (+0.03%)

Onchain Market Cap

$64,994,381,545.75

Circulating Supply Market Cap

$127,607,773,404.00

Other Info

Token Contract (WITH 6 Decimals)

Balance
0.842374 USDT

Value
$0.84 ( ~0.000264033397600268 Eth) [0.0000%]
0x0d502a405a2bad5e2353cdb037ba4f1e5f604568
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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):$69,051,155,930.00
Market Capitalization:$127,607,773,404.00
Circulating Supply:127,539,192,698.00 USDT
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
Binance
BTC-USDT$1.00
0.0003154 Eth
$3,522,141,454.00
38,757.822 BTC
0.0000%
2
Pionex
BTC-USDT$1.00
0.0003143 Eth
$2,665,968,196.00
29,357.562 BTC
0.0000%
3
WEEX
BTC-USDT$1.001
0.0003145 Eth
$2,315,900,136.00
25,540.836 BTC
0.0000%
4
Bybit
BTC-USDT$1.00
0.0003154 Eth
$2,208,041,945.00
24,330.035 BTC
0.0000%
5
BVOX
BTC-USDT$1.00
0.0003157 Eth
$2,164,821,797.00
23,829.408 BTC
0.0000%
6
Ourbit
BTC-USDT$1.00
0.0003140 Eth
$2,117,552,132.00
23,304.249 BTC
0.0000%
7
Binance
SOL-USDT$1.00
0.0003144 Eth
$1,689,381,563.00
7,026,137.783 SOL
0.0000%
8
Binance
ETH-USDT$1.00
0.0003154 Eth
$1,556,804,298.00
501,444.693 ETH
0.0000%
9
OrangeX
BTC-USDT$1.001
0.0003147 Eth
$1,507,988,219.00
16,621.093 BTC
0.0000%
10
WhiteBIT
BTC-USDT$1.00
0.0003169 Eth
$1,456,240,865.00
15,831.411 BTC
0.0000%
11
DigiFinex
BTC-USDT$1.00
0.0003154 Eth
$1,339,528,981.00
14,589.690 BTC
0.0000%
12
OKX
BTC-USDT$1.00
0.0003154 Eth
$1,290,453,975.00
14,183.145 BTC
0.0000%
13
BitMart
BTC-USDT$1.001
0.0003146 Eth
$1,270,996,794.00
13,805.995 BTC
0.0000%
14
Pionex
ETH-USDT$1.00
0.0003147 Eth
$1,164,713,153.00
375,294.590 ETH
0.0000%
15
Tapbit
ETH-USDT$1.001
0.0003146 Eth
$1,139,000,568.00
366,771.780 ETH
0.0000%
16
Hotcoin
BTC-USDT$1.00
0.0003142 Eth
$1,126,650,286.00
12,232.987 BTC
0.0000%
17
Bitunix
BTC-USDT$1.00
0.0003147 Eth
$1,112,197,893.00
12,101.860 BTC
0.0000%
18
BitMart
ETH-USDT$1.001
0.0003146 Eth
$1,101,005,859.00
346,484.614 ETH
0.0000%
19
P2B
BTC-USDT$1.001
0.0003146 Eth
$1,053,978,261.00
11,451.644 BTC
0.0000%
20
Binance
PEPE-USDT$1.00
0.0003144 Eth
$1,039,173,202.00
48,536,418,032,013.000 PEPE
64.4542%
21
WEEX
ETH-USDT$1.00
0.0003168 Eth
$959,929,610.00
309,945.556 ETH
0.0000%
22
AscendEX (BitMax)
BTC-USDT$1.001
0.0003147 Eth
$957,969,673.00
10,431.499 BTC
0.0000%
23
Binance
FDUSD-USDT$1.00
0.0003154 Eth
$758,823,099.00
759,168,925.000 FDUSD
0.0010%
24
Hotcoin
ETH-USDT$1.00
0.0003142 Eth
$691,352,142.00
217,419.931 ETH
0.0000%
25
MEXC
ETH-USDT$1.001
0.0003153 Eth
$669,212,087.00
210,197.831 ETH
0.0000%
26
CoinW
ETH-USDT$1.001
0.0003146 Eth
$662,107,958.00
208,176.325 ETH
0.0000%
27
OKX
DOGE-USDT$0.9997
0.0003147 Eth
$568,839,848.00
1,543,804,234.631 DOGE
0.0021%
28
Coinbase Exchange
USDT-USD$1.00
0.0003153 Eth
$564,716,497.00
564,496,343.580 USDT
0.0007%
29
WhiteBIT
ETH-USDT$1.001
0.0003147 Eth
$559,898,829.00
175,711.956 ETH
0.0000%
30
DigiFinex
ETH-USDT$1.00
0.0003154 Eth
$548,459,345.00
172,282.129 ETH
0.0000%
31
Bybit
ETH-USDT$1.00
0.0003154 Eth
$527,454,526.00
170,012.658 ETH
0.0000%
32
AscendEX (BitMax)
ETH-USDT$1.001
0.0003147 Eth
$525,043,808.00
165,227.225 ETH
0.0000%
33
MEXC
BTC-USDT$1.001
0.0003153 Eth
$518,522,281.00
5,646.948 BTC
0.0000%
34
P2B
ETH-USDT$1.001
0.0003146 Eth
$509,210,617.00
160,163.156 ETH
0.0000%
35
FameEX
SOL-USDT$1.001
0.0003146 Eth
$508,419,251.00
2,114,189.669 SOL
0.0000%
36
LBank
BTC-USDT$1.001
0.0003165 Eth
$504,858,411.00
5,481.452 BTC
0.0000%
37
Deepcoin
ETH-USDT$1.00
0.0003169 Eth
$503,652,502.00
154,789.683 ETH
0.0000%
38
BVOX
ETH-USDT$1.00
0.0003140 Eth
$502,596,940.00
162,052.861 ETH
0.0000%
39
LATOKEN
BTC-USDT$1.00
0.0003168 Eth
$499,151,374.00
5,434.566 BTC
0.0000%
40
HTX
BTC-USDT$1.001
0.0003153 Eth
$487,555,546.00
5,364.973 BTC
0.0000%
41
Ourbit
ETH-USDT$1.001
0.0003153 Eth
$476,945,322.00
153,641.325 ETH
0.0000%
42
Gate.io
ETH-USDT$1.001
0.0003147 Eth
$456,140,941.00
147,257.656 ETH
0.0000%
43
OKX
ETH-USDT$0.9997
0.0003147 Eth
$453,371,126.00
146,201.160 ETH
0.0000%
44
XT.COM
ETH-USDT$1.001
0.0003146 Eth
$434,003,078.00
139,772.417 ETH
0.0000%
45
Gate.io
BTC-USDT$1.001
0.0003147 Eth
$427,895,903.00
4,718.851 BTC
0.0000%
46
Tapbit
BTC-USDT$0.9997
0.0003147 Eth
$408,302,439.00
4,496.640 BTC
0.0000%
47
OrangeX
ETH-USDT$0.9989
0.0003155 Eth
$398,339,342.00
128,664.863 ETH
0.0000%
48
Bybit
XRP-USDT$1.00
0.0003154 Eth
$373,742,052.00
333,609,885.750 XRP
0.0004%
49
Binance
SUI-USDT$1.00
0.0003152 Eth
$352,240,453.00
93,393,194.600 SUI
0.0001%
50
Bybit
SOL-USDT$1.00
0.0003154 Eth
$341,152,741.00
1,419,751.978 SOL
0.0000%
51
Binance
BONK-USDT$1.002
0.0003165 Eth
$341,082,152.00
6,659,344,812,034.000 BONK
8.8433%
52
Binance
HBAR-USDT$1.00
0.0003143 Eth
$339,986,602.00
2,951,721,675.000 HBAR
0.0039%
53
Binance
ADA-USDT$1.001
0.0003147 Eth
$334,932,004.00
450,663,487.000 ADA
0.0006%
54
Deepcoin
SOL-USDT$1.00
0.0003147 Eth
$328,317,974.00
1,341,668.887 SOL
0.0000%
55
Coinbase Exchange
USDT-USDC$0.9986
0.0003148 Eth
$327,185,266.00
327,652,521.920 USDT
0.0004%
56
Bitget
DOGE-USDT$1.001
0.0003153 Eth
$325,244,944.00
884,280,751.928 DOGE
0.0012%
57
Binance
OM-USDT$1.00
0.0003154 Eth
$318,195,710.00
77,932,876.000 OM
0.0001%
58
KuCoin
BTC-USDT$0.9997
0.0003147 Eth
$299,955,309.00
3,270.266 BTC
0.0000%
59
LATOKEN
ETH-USDT$1.001
0.0003145 Eth
$291,053,701.00
91,428.238 ETH
0.0000%
60
Bitget
BTC-USDT$1.001
0.0003153 Eth
$278,939,924.00
3,074.616 BTC
0.0000%
61
FameEX
DOGE-USDT$1.00
0.0003140 Eth
$274,862,801.00
745,868,600.246 DOGE
0.0010%
62
WhiteBIT
XLM-USDT$1.00
0.0003154 Eth
$265,126,084.00
1,117,587,665.800 XLM
0.0015%
63
Binance
WIF-USDT$1.001
0.0003158 Eth
$263,184,082.00
72,653,375.030 WIF
0.0001%
64
Binance
BNB-USDT$1.001
0.0003151 Eth
$260,726,344.00
419,530.197 BNB
0.0000%
65
WhiteBIT
XRP-USDT$1.001
0.0003147 Eth
$250,962,994.00
219,881,415.400 XRP
0.0003%
66
Bitget
PEPE-USDT$1.001
0.0003153 Eth
$248,926,535.00
11,618,708,164,648.000 PEPE
15.4291%
67
CoinW
DOGE-USDT$1.001
0.0003146 Eth
$227,363,333.00
610,845,656.753 DOGE
0.0008%
68
LBank
ETH-USDT$1.00
0.0003148 Eth
$216,157,707.00
67,850.152 ETH
0.0000%
69
Bitunix
SOL-USDT$1.00
0.0003147 Eth
$214,326,898.00
887,765.160 SOL
0.0000%
70
Binance
NEIRO-USDT$1.00
0.0003154 Eth
$203,230,259.00
94,874,133,193.000 NEIRO
0.1260%
71
Gate.io
XRP-USDT$1.001
0.0003147 Eth
$201,913,390.00
180,964,225.100 XRP
0.0002%
72
DigiFinex
DOGE-USDT$1.00
0.0003154 Eth
$183,463,163.00
493,016,713.150 DOGE
0.0007%
73
Coinstore
BTC-USDT$1.001
0.0003147 Eth
$183,148,498.00
2,015.523 BTC
0.0000%
74
Binance
FLOKI-USDT$1.00
0.0003148 Eth
$180,910,402.00
695,183,891,846.000 FLOKI
0.9232%
75
KuCoin
ETH-USDT$0.9997
0.0003147 Eth
$173,259,720.00
54,592.790 ETH
0.0000%
76
Coinstore
ETH-USDT$1.00
0.0003140 Eth
$168,636,837.00
54,268.481 ETH
0.0000%
77
Gate.io
PEPE-USDT$1.001
0.0003153 Eth
$164,186,835.00
7,674,089,241,427.500 PEPE
10.1908%
78
Gate.io
SOL-USDT$1.001
0.0003147 Eth
$155,905,436.00
648,001.509 SOL
0.0000%
79
Bitget
ETH-USDT$1.001
0.0003153 Eth
$149,965,125.00
48,347.147 ETH
0.0000%
80
WEEX
DOGE-USDT$1.00
0.0003168 Eth
$147,943,845.00
402,448,897.798 DOGE
0.0005%
81
Binance
LTC-USDT$1.00
0.0003142 Eth
$138,130,026.00
1,528,415.406 LTC
0.0000%
82
DigiFinex
SOL-USDT$1.00
0.0003154 Eth
$131,499,817.00
545,659.290 SOL
0.0000%
83
LBank
SOL-USDT$1.001
0.0003145 Eth
$130,830,335.00
541,889.893 SOL
0.0000%
84
Bitget
SOL-USDT$1.001
0.0003153 Eth
$129,331,847.00
539,269.047 SOL
0.0000%
85
KuCoin
SOL-USDT$1.00
0.0003154 Eth
$127,094,275.00
527,648.119 SOL
0.0000%
86
Binance
BOME-USDT$1.00
0.0003152 Eth
$123,506,229.00
11,679,260,558.000 BOME
0.0155%
87
BTSE
SOL-USDT$1.00
0.0003147 Eth
$123,035,269.00
509,627.133 SOL
0.0000%
88
Deepcoin
DOGE-USDT$1.001
0.0003158 Eth
$120,844,626.00
326,995,814.810 DOGE
0.0004%
89
HTX
ETH-USDT$0.9997
0.0003147 Eth
$119,510,606.00
38,535.648 ETH
0.0000%
90
WhiteBIT
ADA-USDT$1.00
0.0003140 Eth
$116,404,990.00
155,852,784.700 ADA
0.0002%
91
WhiteBIT
DOGE-USDT$1.00
0.0003154 Eth
$115,162,091.00
309,755,655.000 DOGE
0.0004%
92
Fastex
BTC-USDT$1.001
0.0003145 Eth
$112,321,281.00
1,219.779 BTC
0.0000%
93
Bybit
MNT-USDT$1.001
0.0003153 Eth
$109,630,261.00
151,942,082.030 MNT
0.0002%
94
Bitget
XRP-USDT$1.001
0.0003153 Eth
$96,213,461.00
86,358,907.238 XRP
0.0001%
95
BTSE
DOGE-USDT$1.001
0.0003143 Eth
$89,796,280.00
240,522,909.946 DOGE
0.0003%
96
HashKey Global
BTC-USDT$1.00
0.0003145 Eth
$89,504,274.00
989.340 BTC
0.0000%
97
WhiteBIT
NEAR-USDT$1.001
0.0003147 Eth
$83,851,842.00
13,379,410.880 NEAR
0.0000%
98
CoinEx
DOGE-USDT$1.001
0.0003146 Eth
$82,254,685.00
223,170,942.421 DOGE
0.0003%
99
LBank
USDC-USDT$1.001
0.0003146 Eth
$81,392,140.00
81,464,254.540 USDC
0.0001%
100
BYDFi
BTC-USDT$1.002
0.0003165 Eth
$75,439,485.00
818.430 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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