ETH Price: $3,330.67 (-4.28%)

Token

Tether USD (USDT)
 

Overview

Max Total Supply

76,926,220,145.483487 USDT

Holders

6,550,306 ( 0.037%)

Market

Price

$1.00 @ 0.000300 ETH

Onchain Market Cap

$76,865,525,357.79

Circulating Supply Market Cap

$139,269,166,726.00

Other Info

Token Contract (WITH 6 Decimals)

Balance
8,000 USDT

Value
$7,993.69 ( ~2.4000 Eth) [0.0000%]
0x44541d665b7e1481E5a0eFd955A60Eb24941734a
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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):$52,927,807,215.00
Market Capitalization:$139,269,166,726.00
Circulating Supply:139,427,879,732.00 USDT
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
OrangeX
BTC-USDT$0.9989
0.0002998 Eth
$2,407,096,471.00
24,931.114 BTC
0.0000%
2
Binance
BTC-USDT$0.9988
0.0002998 Eth
$2,048,612,919.00
21,211.838 BTC
0.0000%
3
Pionex
BTC-USDT$0.9989
0.0002998 Eth
$1,682,466,531.00
17,414.800 BTC
0.0000%
4
AscendEX (BitMax)
BTC-USDT$0.9988
0.0002998 Eth
$935,015,455.00
9,771.797 BTC
0.0000%
5
Binance
USDC-USDT$0.9989
0.0002998 Eth
$853,041,640.00
853,180,984.000 USDC
0.0146%
6
MEXC
BTC-USDT$0.9988
0.0002998 Eth
$736,404,006.00
7,693.844 BTC
0.0000%
7
CoinW
BTC-USDT$0.9989
0.0002998 Eth
$707,043,505.00
7,386.798 BTC
0.0000%
8
Binance
FDUSD-USDT$0.9989
0.0002998 Eth
$704,864,821.00
704,000,922.000 FDUSD
0.0121%
9
OKX
BTC-USDT$0.9988
0.0002998 Eth
$703,264,807.00
7,282.478 BTC
0.0000%
10
Bitget
BTC-USDT$0.9989
0.0002998 Eth
$681,832,195.00
7,057.047 BTC
0.0000%
11
Bybit
ETH-USDT$0.9989
0.0002998 Eth
$671,154,594.00
199,031.266 ETH
0.0000%
12
Bitget
ETH-USDT$0.9989
0.0002998 Eth
$547,819,343.00
162,266.302 ETH
0.0000%
13
DigiFinex
BTC-USDT$0.9989
0.0002998 Eth
$519,893,449.00
5,431.372 BTC
0.0000%
14
AscendEX (BitMax)
ETH-USDT$0.9988
0.0002998 Eth
$505,924,450.00
151,859.236 ETH
0.0000%
15
Hotcoin
BTC-USDT$0.9989
0.0002998 Eth
$466,854,093.00
4,877.190 BTC
0.0000%
16
OKX
ETH-USDT$0.9989
0.0002998 Eth
$451,961,454.00
133,758.627 ETH
0.0000%
17
HTX
BTC-USDT$0.9988
0.0002998 Eth
$451,024,757.00
4,664.912 BTC
0.0000%
18
Bitunix
BTC-USDT$0.9989
0.0002998 Eth
$394,325,961.00
4,119.494 BTC
0.0000%
19
Binance
SOL-USDT$0.9989
0.0002998 Eth
$391,565,447.00
2,045,525.779 SOL
0.0000%
20
LBank
BTC-USDT$0.9989
0.0002998 Eth
$389,718,844.00
4,071.257 BTC
0.0000%
21
Gate.io
BTC-USDT$0.9988
0.0002998 Eth
$363,241,658.00
3,767.894 BTC
0.0000%
22
LATOKEN
BTC-USDT$0.9988
0.0002998 Eth
$271,982,322.00
2,841.927 BTC
0.0000%
23
BTSE
BTC-USDT$0.9989
0.0002998 Eth
$269,837,913.00
2,819.640 BTC
0.0000%
24
Binance
BNB-USDT$0.9993
0.0003003 Eth
$265,776,225.00
380,756.050 BNB
0.0000%
25
Bybit
XRP-USDT$0.9989
0.0002998 Eth
$233,581,387.00
106,549,938.310 XRP
0.0018%
26
BigONE
BTC-USDT$0.9989
0.0002998 Eth
$233,472,994.00
2,439.076 BTC
0.0000%
27
Biconomy.com
BTC-USDT$0.9988
0.0002998 Eth
$214,782,151.00
2,225.425 BTC
0.0000%
28
Binance
SUI-USDT$0.9992
0.0003000 Eth
$211,730,060.00
49,349,495.400 SUI
0.0008%
29
OKX
DOGE-USDT$0.9989
0.0002998 Eth
$184,642,888.00
577,392,821.194 DOGE
0.0099%
30
Bybit
USDC-USDT$0.9989
0.0002998 Eth
$182,181,888.00
182,205,825.090 USDC
0.0031%
31
Binance
USUAL-USDT$0.9989
0.0002998 Eth
$178,519,036.00
136,125,429.100 USUAL
0.0023%
32
Gate.io
ETH-USDT$0.9988
0.0002998 Eth
$177,388,233.00
52,535.458 ETH
0.0000%
33
LBank
ETH-USDT$0.9989
0.0002998 Eth
$175,960,477.00
52,804.573 ETH
0.0000%
34
KuCoin
BTC-USDT$0.9988
0.0002998 Eth
$175,519,940.00
1,834.262 BTC
0.0000%
35
DigiFinex
ETH-USDT$0.9989
0.0002998 Eth
$170,007,040.00
51,024.509 ETH
0.0000%
36
Bybit
SOL-USDT$0.9989
0.0002998 Eth
$169,313,367.00
885,603.307 SOL
0.0000%
37
Bitget
XRP-USDT$0.9989
0.0002998 Eth
$168,576,302.00
76,856,428.172 XRP
0.0013%
38
Binance
TRX-USDT$0.9988
0.0003003 Eth
$168,411,423.00
665,733,878.600 TRX
0.0114%
39
Coinstore
ETH-USDT$0.9989
0.0002998 Eth
$165,028,871.00
48,915.305 ETH
0.0000%
40
MEXC
XRP-USDT$0.9988
0.0002998 Eth
$164,595,434.00
76,442,303.230 XRP
0.0013%
41
KuCoin
ETH-USDT$0.9988
0.0002998 Eth
$160,713,108.00
48,246.041 ETH
0.0000%
42
CoinW
XRP-USDT$0.9989
0.0002998 Eth
$148,502,975.00
68,932,047.600 XRP
0.0012%
43
Binance
VANA-USDT$0.9989
0.0002998 Eth
$136,609,933.00
6,564,281.990 VANA
0.0001%
44
MEXC
DOGE-USDT$0.9988
0.0002998 Eth
$128,523,993.00
411,405,112.860 DOGE
0.0071%
45
HTX
DOGE-USDT$0.9988
0.0002998 Eth
$118,216,085.00
370,644,560.539 DOGE
0.0064%
46
MEXC
MX-USDT$0.9988
0.0002998 Eth
$117,435,903.00
32,621,536.300 MX
0.0006%
47
Binance
ADA-USDT$0.999
0.0003002 Eth
$115,168,645.00
131,340,249.000 ADA
0.0023%
48
Bybit
MNT-USDT$0.9989
0.0002998 Eth
$111,600,264.00
93,695,967.520 MNT
0.0016%
49
Binance
ENA-USDT$0.9989
0.0002998 Eth
$110,925,854.00
116,220,476.370 ENA
0.0020%
50
WhiteBIT
SUI-USDT$0.9988
0.0002998 Eth
$110,309,874.00
26,288,939.257 SUI
0.0005%
51
Bybit
VANA-USDT$0.9989
0.0002998 Eth
$108,043,651.00
5,245,323.190 VANA
0.0001%
52
Bitget
X-USDT$0.9988
0.0002998 Eth
$107,862,261.00
637,013,262,487.300 X
10.9255%
53
OKX
MOVE-USDT$0.9989
0.0002998 Eth
$104,809,137.00
92,289,819.300 MOVE
0.0016%
54
OKX
SOL-USDT$0.9989
0.0002998 Eth
$103,461,761.00
541,695.750 SOL
0.0000%
55
Bitget
DOGE-USDT$0.9989
0.0002998 Eth
$95,328,872.00
298,335,374.385 DOGE
0.0051%
56
Bitget
SOL-USDT$0.9989
0.0002998 Eth
$87,734,073.00
458,775.050 SOL
0.0000%
57
Gate.io
GT-USDT$0.9988
0.0002998 Eth
$87,495,474.00
5,510,286.384 GT
0.0001%
58
HTX
ETH-USDT$0.9988
0.0002998 Eth
$86,670,527.00
25,547.766 ETH
0.0000%
59
Gate.io
XRP-USDT$0.9988
0.0002998 Eth
$83,254,260.00
37,985,851.588 XRP
0.0007%
60
DigiFinex
TRX-USDT$0.9989
0.0002998 Eth
$75,096,453.00
296,225,144.100 TRX
0.0051%
61
OKX
XRP-USDT$0.9989
0.0002998 Eth
$74,842,143.00
34,185,359.818 XRP
0.0006%
62
Gate.io
DOGE-USDT$0.9988
0.0002998 Eth
$74,256,051.00
232,280,112.600 DOGE
0.0040%
63
MEXC
SOL-USDT$0.9988
0.0002998 Eth
$74,050,300.00
393,335.330 SOL
0.0000%
64
Gate.io
PENGU-USDT$0.9989
0.0002998 Eth
$73,634,492.00
1,878,796,522.600 PENGU
0.0322%
65
BingX
BTC-USDT$0.9988
0.0002998 Eth
$73,414,220.00
759.719 BTC
0.0000%
66
Gate.io
ONDO-USDT$0.9989
0.0002998 Eth
$71,833,382.00
48,037,733.560 ONDO
0.0008%
67
Binance
CRV-USDT$0.9989
0.0002998 Eth
$68,766,773.00
72,373,383.400 CRV
0.0012%
68
KuCoin
XRP-USDT$0.9988
0.0002998 Eth
$68,338,301.00
31,736,866.277 XRP
0.0005%
69
Binance
PNUT-USDT$0.9989
0.0002998 Eth
$66,825,382.00
100,792,149.500 PNUT
0.0017%
70
Bybit
SUI-USDT$0.9989
0.0002998 Eth
$66,416,194.00
15,480,313.890 SUI
0.0003%
71
Bybit
DOGE-USDT$0.9989
0.0002998 Eth
$65,824,384.00
205,852,648.400 DOGE
0.0035%
72
Azbit
BTC-USDT$0.9989
0.0002998 Eth
$61,385,350.00
635.559 BTC
0.0000%
73
DigiFinex
DOGE-USDT$0.9989
0.0002998 Eth
$58,815,643.00
188,260,914.210 DOGE
0.0032%
74
Bitget
SUI-USDT$0.9988
0.0002998 Eth
$58,439,794.00
13,547,358.270 SUI
0.0002%
75
Binance
UNI-USDT$0.9992
0.0003000 Eth
$52,121,136.00
3,952,070.410 UNI
0.0001%
76
OKX
SUI-USDT$0.9989
0.0002998 Eth
$51,193,635.00
11,911,285.219 SUI
0.0002%
77
OKX
PEPE-USDT$0.9989
0.0002998 Eth
$50,883,850.00
2,882,816,878,856.000 PEPE
49.4436%
78
Bitget
USDC-USDT$0.9989
0.0002998 Eth
$50,100,782.00
50,106,188.744 USDC
0.0009%
79
BingX
ETH-USDT$0.9988
0.0002998 Eth
$49,573,581.00
14,690.575 ETH
0.0000%
80
KuCoin
SOL-USDT$0.9988
0.0002998 Eth
$49,447,895.00
262,697.161 SOL
0.0000%
81
Binance
COW-USDT$0.9989
0.0002998 Eth
$47,027,923.00
41,595,100.700 COW
0.0007%
82
WhiteBIT
ADA-USDT$0.9989
0.0002998 Eth
$46,226,207.00
53,752,878.330 ADA
0.0009%
83
Gate.io
HBAR-USDT$0.9988
0.0002998 Eth
$45,916,348.00
155,457,000.560 HBAR
0.0027%
84
WEEX
SUI-USDT$0.999
0.0003004 Eth
$45,827,667.00
10,665,744.000 SUI
0.0002%
85
OKX
USDC-USDT$0.9989
0.0002998 Eth
$44,947,478.00
44,945,539.620 USDC
0.0008%
86
Binance
ARB-USDT$0.9989
0.0002998 Eth
$44,387,308.00
58,289,609.500 ARB
0.0010%
87
Binance
RSR-USDT$0.9989
0.0002998 Eth
$43,608,984.00
3,126,570,985.200 RSR
0.0536%
88
Binance
DOT-USDT$0.9989
0.0002998 Eth
$42,248,162.00
5,953,554.630 DOT
0.0001%
89
Gate.io
SUI-USDT$0.9989
0.0002998 Eth
$42,055,935.00
9,802,146.020 SUI
0.0002%
90
HTX
PEPE-USDT$0.9989
0.0002998 Eth
$40,457,932.00
2,298,447,902,179.550 PEPE
39.4210%
91
BTSE
DOGE-USDT$0.9989
0.0002998 Eth
$36,382,079.00
116,482,416.819 DOGE
0.0020%
92
PointPay
BTC-USDT$0.9989
0.0002998 Eth
$34,138,464.00
353.476 BTC
0.0000%
93
OKX
MOODENG-USDT$0.9989
0.0002998 Eth
$32,996,682.00
118,654,829.850 MOODENG
0.0020%
94
DigiFinex
SOL-USDT$0.9989
0.0002998 Eth
$32,324,635.00
171,705.250 SOL
0.0000%
95
DigiFinex
SUI-USDT$0.9989
0.0002998 Eth
$31,606,244.00
7,529,172.200 SUI
0.0001%
96
MEXC
ONDO-USDT$0.9989
0.0002998 Eth
$29,279,415.00
20,183,286.570 ONDO
0.0003%
97
HTX
ADA-USDT$0.9988
0.0002998 Eth
$27,381,751.00
31,245,460.691 ADA
0.0005%
98
OKX
HBAR-USDT$0.9989
0.0002998 Eth
$25,966,203.00
87,727,808.120 HBAR
0.0015%
99
Bitget
ADA-USDT$0.9989
0.0002998 Eth
$25,018,839.00
28,589,679.690 ADA
0.0005%
100
Binance
WBTC-USDT$0.9988
0.0003000 Eth
$23,126,390.00
239.612 WBTC
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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