ETH Price: $3,999.99 (-0.05%)

Token

Tether USD (USDT)
 

Overview

Max Total Supply

74,928,719,896.684091 USDT

Holders

6,520,453 ( -0.016%)

Market

Price

$1.00 @ 0.000250 ETH (-0.03%)

Onchain Market Cap

$75,003,648,616.58

Circulating Supply Market Cap

$137,977,588,614.00

Other Info

Token Contract (WITH 6 Decimals)

Balance
0.000055 USDT

Value
$0.00 ( ~0 Eth) [0.0000%]
0x48f57a9a6ab95f4c5a554c3203bb9aaaa0c0ec46
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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):$61,718,953,184.00
Market Capitalization:$137,977,588,614.00
Circulating Supply:137,928,486,647.00 USDT
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
Binance
DOGE-USDT$1.00
0.0002499 Eth
$1,923,703,914.00
4,170,231,635.400 DOGE
0.0071%
2
Bybit
BTC-USDT$1.00
0.0002500 Eth
$1,857,529,822.00
18,614.680 BTC
0.0000%
3
Binance
XRP-USDT$1.001
0.0002502 Eth
$1,387,258,569.00
545,867,160.000 XRP
0.0009%
4
Binance
BTC-USDT$1.00
0.0002500 Eth
$1,324,968,696.00
13,278.717 BTC
0.0000%
5
AscendEX (BitMax)
BTC-USDT$1.00
0.0002498 Eth
$949,129,152.00
9,449.028 BTC
0.0000%
6
Ourbit
BTC-USDT$1.00
0.0002498 Eth
$795,569,411.00
7,975.390 BTC
0.0000%
7
Binance
SOL-USDT$1.001
0.0002498 Eth
$733,286,745.00
3,062,819.886 SOL
0.0000%
8
OKX
DOGE-USDT$1.00
0.0002499 Eth
$731,931,933.00
1,585,257,781.291 DOGE
0.0027%
9
Toobit
ETH-USDT$1.00
0.0002498 Eth
$712,210,371.00
178,605.105 ETH
0.0000%
10
DigiFinex
BTC-USDT$1.00
0.0002499 Eth
$565,088,207.00
5,629.946 BTC
0.0000%
11
AscendEX (BitMax)
ETH-USDT$1.00
0.0002498 Eth
$518,127,528.00
129,583.473 ETH
0.0000%
12
P2B
BTC-USDT$1.001
0.0002498 Eth
$497,387,135.00
4,950.651 BTC
0.0000%
13
Bybit
ETH-USDT$1.00
0.0002500 Eth
$493,242,066.00
123,726.728 ETH
0.0000%
14
Bitget
ETH-USDT$1.00
0.0002500 Eth
$444,464,863.00
111,476.728 ETH
0.0000%
15
Binance
1MBABYDOGE-USDT$1.00
0.0002499 Eth
$420,871,303.00
99,390,316,346.000 1MBABYDOGE
0.1691%
16
Bitget
BTC-USDT$1.00
0.0002500 Eth
$413,393,644.00
4,144.284 BTC
0.0000%
17
OKX
BTC-USDT$1.00
0.0002500 Eth
$400,626,158.00
4,015.901 BTC
0.0000%
18
DigiFinex
ETH-USDT$1.00
0.0002499 Eth
$394,569,351.00
98,742.034 ETH
0.0000%
19
Azbit
BTC-USDT$1.001
0.0002498 Eth
$391,928,552.00
3,927.391 BTC
0.0000%
20
Bitget
DOGE-USDT$1.00
0.0002500 Eth
$383,699,744.00
832,852,552.227 DOGE
0.0014%
21
Bitunix
BTC-USDT$1.00
0.0002498 Eth
$382,954,661.00
3,812.752 BTC
0.0000%
22
MEXC
XRP-USDT$1.001
0.0002501 Eth
$377,846,704.00
147,484,495.910 XRP
0.0003%
23
Gate.io
PEPE-USDT$1.00
0.0002498 Eth
$342,268,534.00
13,716,460,433,596.000 PEPE
23.3415%
24
Binance
BNB-USDT$1.00
0.0002499 Eth
$331,756,916.00
443,551.732 BNB
0.0000%
25
OKX
ETH-USDT$1.00
0.0002499 Eth
$330,018,487.00
82,825.661 ETH
0.0000%
26
Bybit
XRP-USDT$1.00
0.0002500 Eth
$329,875,473.00
129,889,682.470 XRP
0.0002%
27
Binance
PNUT-USDT$1.001
0.0002498 Eth
$328,044,772.00
219,911,435.200 PNUT
0.0004%
28
Bitget
XRP-USDT$1.00
0.0002500 Eth
$326,562,855.00
128,414,196.778 XRP
0.0002%
29
BitMart
ETH-USDT$1.00
0.0002500 Eth
$315,192,020.00
78,821.244 ETH
0.0000%
30
Gate.io
DOGE-USDT$1.00
0.0002500 Eth
$313,040,558.00
678,972,874.413 DOGE
0.0012%
31
Gate.io
XRP-USDT$1.001
0.0002498 Eth
$303,293,118.00
119,542,228.403 XRP
0.0002%
32
Binance
HBAR-USDT$1.001
0.0002503 Eth
$293,972,840.00
883,738,298.000 HBAR
0.0015%
33
WhiteBIT
XRP-USDT$1.001
0.0002503 Eth
$292,933,480.00
114,316,509.780 XRP
0.0002%
34
Bitunix
DOGE-USDT$1.00
0.0002498 Eth
$279,654,755.00
600,532,434.000 DOGE
0.0010%
35
Bybit
DOGE-USDT$1.00
0.0002500 Eth
$269,092,839.00
584,287,272.800 DOGE
0.0010%
36
Bitget
PEPE-USDT$1.00
0.0002500 Eth
$260,054,080.00
10,389,014,120,842.000 PEPE
17.6792%
37
OKX
PEPE-USDT$1.00
0.0002499 Eth
$256,510,598.00
10,256,463,945,361.000 PEPE
17.4536%
38
Bitunix
ETH-USDT$1.00
0.0002498 Eth
$243,713,326.00
60,948.787 ETH
0.0000%
39
OKX
XRP-USDT$1.00
0.0002499 Eth
$237,776,248.00
93,449,656.248 XRP
0.0002%
40
Binance
SUI-USDT$1.00
0.0002499 Eth
$231,509,342.00
54,181,326.200 SUI
0.0001%
41
Bitget
BGB-USDT$1.00
0.0002500 Eth
$214,826,019.00
78,727,511.493 BGB
0.0001%
42
WhiteBIT
PEPE-USDT$1.001
0.0002498 Eth
$214,602,333.00
8,480,121,757,641.000 PEPE
14.4308%
43
Binance
LINK-USDT$1.001
0.0002503 Eth
$199,623,390.00
7,743,205.480 LINK
0.0000%
44
Bybit
SUPRA-USDT$1.00
0.0002500 Eth
$196,806,804.00
4,798,792,117.000 SUPRA
0.0082%
45
Bybit
SOL-USDT$1.00
0.0002500 Eth
$195,482,159.00
816,662.891 SOL
0.0000%
46
DigiFinex
DOGE-USDT$1.00
0.0002499 Eth
$189,985,932.00
408,526,732.950 DOGE
0.0007%
47
HTX
BTC-USDT$1.001
0.0002498 Eth
$188,259,375.00
1,886.663 BTC
0.0000%
48
Bybit
PEPE-USDT$1.00
0.0002500 Eth
$186,202,172.00
7,451,006,694,968.000 PEPE
12.6795%
49
Binance
UNI-USDT$1.00
0.0002499 Eth
$184,062,437.00
10,073,135.580 UNI
0.0000%
50
Coinbase Exchange
USDT-USDC$1.001
0.0002501 Eth
$169,375,685.00
169,253,075.180 USDT
0.0003%
51
Binance
BONK-USDT$1.001
0.0002501 Eth
$168,451,774.00
3,608,067,797,223.000 BONK
6.1399%
52
Toobit
DOGE-USDT$1.00
0.0002498 Eth
$168,390,482.00
364,847,373.000 DOGE
0.0006%
53
HTX
DOGE-USDT$1.001
0.0002498 Eth
$164,469,389.00
358,044,221.781 DOGE
0.0006%
54
Gate.io
BTC-USDT$1.00
0.0002500 Eth
$163,061,595.00
1,634.788 BTC
0.0000%
55
OKX
SOL-USDT$1.00
0.0002499 Eth
$161,819,569.00
675,671.871 SOL
0.0000%
56
LBank
SOL-USDT$1.00
0.0002500 Eth
$150,857,493.00
635,277.641 SOL
0.0000%
57
Toobit
XRP-USDT$1.001
0.0002501 Eth
$135,076,880.00
53,102,116.000 XRP
0.0001%
58
BTSE
XRP-USDT$1.00
0.0002500 Eth
$133,925,650.00
52,330,012.606 XRP
0.0001%
59
Binance
ACT-USDT$1.001
0.0002498 Eth
$132,134,806.00
211,261,232.900 ACT
0.0004%
60
Gate.io
KAS-USDT$1.00
0.0002498 Eth
$131,844,058.00
725,355,134.600 KAS
0.0012%
61
Bybit
MNT-USDT$1.00
0.0002500 Eth
$128,752,940.00
107,647,894.880 MNT
0.0002%
62
Gate.io
ETH-USDT$1.00
0.0002500 Eth
$126,478,779.00
31,748.480 ETH
0.0000%
63
Binance
ENA-USDT$1.00
0.0002499 Eth
$117,313,248.00
114,218,795.110 ENA
0.0002%
64
Binance
ALGO-USDT$1.001
0.0002502 Eth
$115,886,621.00
230,145,148.000 ALGO
0.0004%
65
KuCoin
BTC-USDT$1.00
0.0002499 Eth
$114,709,665.00
1,142.700 BTC
0.0000%
66
Binance
SAND-USDT$1.00
0.0002499 Eth
$113,501,567.00
124,047,691.000 SAND
0.0002%
67
Binance
CRV-USDT$1.001
0.0002498 Eth
$109,235,649.00
92,450,356.500 CRV
0.0002%
68
Binance
GALA-USDT$1.001
0.0002501 Eth
$106,047,037.00
1,741,588,496.000 GALA
0.0030%
69
Gate.io
HBAR-USDT$1.00
0.0002498 Eth
$104,290,712.00
313,955,698.150 HBAR
0.0005%
70
WEEX
XRP-USDT$1.001
0.0002503 Eth
$100,156,034.00
39,030,459.907 XRP
0.0001%
71
Bitget
SOL-USDT$1.00
0.0002500 Eth
$96,788,693.00
404,515.572 SOL
0.0000%
72
Ourbit
XRP-USDT$1.001
0.0002501 Eth
$93,611,394.00
36,827,452.760 XRP
0.0001%
73
MEXC
SOL-USDT$1.001
0.0002498 Eth
$93,209,317.00
392,420.120 SOL
0.0000%
74
Binance
FTM-USDT$1.001
0.0002500 Eth
$92,119,629.00
69,219,074.000 FTM
0.0001%
75
KuCoin
DOGE-USDT$1.00
0.0002499 Eth
$90,967,107.00
195,564,501.419 DOGE
0.0003%
76
Bitunix
SOL-USDT$1.00
0.0002498 Eth
$90,801,088.00
382,537.522 SOL
0.0000%
77
KuCoin
SOL-USDT$1.00
0.0002499 Eth
$90,002,534.00
379,068.529 SOL
0.0000%
78
Binance
NEAR-USDT$1.00
0.0002499 Eth
$87,217,786.00
11,363,586.600 NEAR
0.0000%
79
BVOX
DOGE-USDT$1.001
0.0002498 Eth
$79,445,030.00
172,825,350.000 DOGE
0.0003%
80
CoinEx
XRP-USDT$1.001
0.0002501 Eth
$77,943,660.00
30,683,568.740 XRP
0.0001%
81
OKX
SHIB-USDT$1.00
0.0002499 Eth
$77,920,037.00
2,417,623,407,074.000 SHIB
4.1141%
82
Bitget
PNUT-USDT$1.00
0.0002500 Eth
$77,229,116.00
51,943,395.980 PNUT
0.0001%
83
Binance
DYDX-USDT$1.001
0.0002502 Eth
$77,060,878.00
31,509,826.030 DYDX
0.0001%
84
HTX
ETH-USDT$1.001
0.0002498 Eth
$74,484,490.00
18,681.799 ETH
0.0000%
85
Binance
DOGS-USDT$1.00
0.0002499 Eth
$73,212,685.00
82,914,193,209.000 DOGS
0.1411%
86
Binance
BCH-USDT$1.00
0.0002501 Eth
$72,770,859.00
118,594.184 BCH
0.0000%
87
Binance
FIL-USDT$1.001
0.0002498 Eth
$72,607,865.00
9,316,469.970 FIL
0.0000%
88
KuCoin
SHIB-USDT$1.00
0.0002499 Eth
$72,481,797.00
2,241,170,024,319.760 SHIB
3.8138%
89
DigiFinex
XRP-USDT$1.00
0.0002499 Eth
$71,676,946.00
28,008,128.000 XRP
0.0000%
90
MEXC
HBAR-USDT$1.001
0.0002498 Eth
$69,905,556.00
211,411,625.600 HBAR
0.0004%
91
Gate.io
SOL-USDT$1.00
0.0002498 Eth
$67,678,612.00
282,972.057 SOL
0.0000%
92
LBank
XRP-USDT$1.00
0.0002500 Eth
$67,037,223.00
26,187,831.710 XRP
0.0000%
93
WhiteBIT
LINK-USDT$1.00
0.0002501 Eth
$64,719,286.00
2,393,972.920 LINK
0.0000%
94
Bitget
SUI-USDT$1.00
0.0002500 Eth
$61,574,091.00
14,389,411.520 SUI
0.0000%
95
OKX
SUI-USDT$1.00
0.0002499 Eth
$61,414,431.00
14,359,243.906 SUI
0.0000%
96
Gate.io
MOODENG-USDT$1.001
0.0002498 Eth
$55,062,373.00
106,775,723.940 MOODENG
0.0002%
97
Binance
TIA-USDT$1.00
0.0002499 Eth
$52,495,922.00
6,225,695.370 TIA
0.0000%
98
WhiteBIT
DOT-USDT$1.001
0.0002498 Eth
$51,728,731.00
4,901,751.439 DOT
0.0000%
99
BingX
ETH-USDT$1.00
0.0002500 Eth
$47,746,886.00
11,969.694 ETH
0.0000%
100
BingX
BTC-USDT$1.00
0.0002500 Eth
$37,377,203.00
374.565 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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