ETH Price: $3,889.75 (+0.54%)

Token

Tether USD (USDT)
 

Overview

Max Total Supply

76,928,104,353.364467 USDT

Holders

6,550,000 ( -0.038%)

Market

Price

$1.00 @ 0.000257 ETH (+0.02%)

Onchain Market Cap

$76,928,104,353.36

Circulating Supply Market Cap

$140,288,702,967.00

Other Info

Token Contract (WITH 6 Decimals)

Balance
0 USDT

Value
$0.00
0xd3d68b71f974b908dd6db05794e0810f901fb025
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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):$97,942,184,007.00
Market Capitalization:$140,288,702,967.00
Circulating Supply:140,253,672,849.00 USDT
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
Bybit
BTC-USDT$0.9995
0.0002574 Eth
$1,957,748,110.00
19,270.533 BTC
0.0000%
2
Binance
BTC-USDT$1.001
0.0002573 Eth
$1,556,733,167.00
15,280.059 BTC
0.0000%
3
CoinW
BTC-USDT$0.9995
0.0002574 Eth
$1,270,784,883.00
12,337.667 BTC
0.0000%
4
BVOX
BTC-USDT$0.9995
0.0002574 Eth
$1,205,261,161.00
11,843.589 BTC
0.0000%
5
MEXC
BTC-USDT$0.9996
0.0002578 Eth
$1,109,748,351.00
10,793.406 BTC
0.0000%
6
Binance
FDUSD-USDT$1.00
0.0002581 Eth
$1,066,660,099.00
1,065,105,542.000 FDUSD
0.0060%
7
Binance
ETH-USDT$0.9997
0.0002578 Eth
$971,874,512.00
251,346.235 ETH
0.0000%
8
AscendEX (BitMax)
BTC-USDT$0.9995
0.0002574 Eth
$958,785,989.00
9,293.736 BTC
0.0000%
9
Tapbit
ETH-USDT$0.9997
0.0002577 Eth
$735,303,514.00
190,183.000 ETH
0.0000%
10
MEXC
ETH-USDT$1.00
0.0002576 Eth
$660,445,268.00
170,124.081 ETH
0.0000%
11
DigiFinex
BTC-USDT$0.9995
0.0002574 Eth
$655,585,459.00
6,355.068 BTC
0.0000%
12
Binance
XRP-USDT$1.001
0.0002573 Eth
$654,202,776.00
271,984,002.000 XRP
0.0015%
13
Bybit
ETH-USDT$0.9995
0.0002574 Eth
$627,168,831.00
162,263.722 ETH
0.0000%
14
Binance
DOGE-USDT$1.00
0.0002576 Eth
$588,764,236.00
1,486,538,109.000 DOGE
0.0083%
15
Binance
USDC-USDT$0.9997
0.0002580 Eth
$574,969,320.00
575,094,523.000 USDC
0.0032%
16
P2B
BTC-USDT$1.00
0.0002576 Eth
$566,782,021.00
5,498.450 BTC
0.0000%
17
Bitget
ETH-USDT$0.9995
0.0002574 Eth
$529,923,206.00
137,119.068 ETH
0.0000%
18
AscendEX (BitMax)
ETH-USDT$0.9995
0.0002574 Eth
$514,526,096.00
132,342.178 ETH
0.0000%
19
Binance
SOL-USDT$0.9998
0.0002580 Eth
$478,048,889.00
2,179,644.516 SOL
0.0000%
20
Bitget
BTC-USDT$0.9995
0.0002574 Eth
$463,790,765.00
4,554.822 BTC
0.0000%
21
BVOX
ETH-USDT$0.9996
0.0002574 Eth
$450,647,142.00
116,548.323 ETH
0.0000%
22
OKX
BTC-USDT$1.001
0.0002573 Eth
$439,232,048.00
4,305.881 BTC
0.0000%
23
DigiFinex
ETH-USDT$0.9995
0.0002574 Eth
$390,189,073.00
100,341.346 ETH
0.0000%
24
OKX
ETH-USDT$0.9995
0.0002574 Eth
$389,799,270.00
100,867.711 ETH
0.0000%
25
WEEX
ETH-USDT$0.9997
0.0002577 Eth
$385,589,596.00
99,753.025 ETH
0.0000%
26
BitMart
BTC-USDT$0.9995
0.0002574 Eth
$378,344,788.00
3,670.000 BTC
0.0000%
27
Azbit
BTC-USDT$0.9996
0.0002575 Eth
$373,714,813.00
3,676.826 BTC
0.0000%
28
WhiteBIT
ETH-USDT$1.00
0.0002576 Eth
$358,963,078.00
92,292.217 ETH
0.0000%
29
Bitunix
BTC-USDT$0.9995
0.0002573 Eth
$350,222,724.00
3,399.663 BTC
0.0000%
30
Deepcoin
ETH-USDT$0.9996
0.0002574 Eth
$345,780,316.00
90,796.235 ETH
0.0000%
31
CoinW
ETH-USDT$0.9995
0.0002576 Eth
$343,867,746.00
88,619.013 ETH
0.0000%
32
Ourbit
ETH-USDT$0.9995
0.0002576 Eth
$338,398,128.00
87,501.249 ETH
0.0000%
33
LBank
BTC-USDT$1.00
0.0002576 Eth
$313,105,443.00
3,035.039 BTC
0.0000%
34
BitMart
ETH-USDT$0.9995
0.0002574 Eth
$284,917,869.00
73,397.641 ETH
0.0000%
35
OKX
DOGE-USDT$0.9995
0.0002574 Eth
$284,219,593.00
717,419,191.327 DOGE
0.0040%
36
Binance
ENA-USDT$1.001
0.0002573 Eth
$283,005,893.00
254,957,038.630 ENA
0.0014%
37
Binance
LINK-USDT$0.9999
0.0002580 Eth
$277,207,444.00
9,414,794.550 LINK
0.0001%
38
KuCoin
XRP-USDT$0.9995
0.0002574 Eth
$271,542,956.00
112,710,702.132 XRP
0.0006%
39
Binance
PEPE-USDT$0.9995
0.0002574 Eth
$269,751,524.00
11,586,469,093,758.000 PEPE
64.9731%
40
XT.COM
ETH-USDT$0.9996
0.0002574 Eth
$269,470,705.00
69,696.257 ETH
0.0000%
41
Binance
FLOKI-USDT$1.001
0.0002573 Eth
$243,673,096.00
1,031,539,068,221.000 FLOKI
5.7845%
42
Coinbase Exchange
USDT-USD$0.9995
0.0002570 Eth
$217,044,144.00
217,157,066.050 USDT
0.0012%
43
Binance
SUI-USDT$1.001
0.0002573 Eth
$212,524,684.00
47,499,125.900 SUI
0.0003%
44
Gate.io
BTC-USDT$0.9995
0.0002574 Eth
$201,744,132.00
1,980.868 BTC
0.0000%
45
BTSE
BTC-USDT$1.00
0.0002576 Eth
$200,486,824.00
1,943.859 BTC
0.0000%
46
Binance
BNB-USDT$0.9995
0.0002574 Eth
$196,312,019.00
275,843.669 BNB
0.0000%
47
Bitget
BGB-USDT$0.9995
0.0002574 Eth
$194,167,560.00
63,670,417.274 BGB
0.0004%
48
Tapbit
BTC-USDT$0.9996
0.0002574 Eth
$188,072,590.00
1,847.530 BTC
0.0000%
49
HTX
BTC-USDT$1.00
0.0002573 Eth
$185,723,555.00
1,824.237 BTC
0.0000%
50
Binance
TRX-USDT$1.001
0.0002573 Eth
$181,052,903.00
641,591,007.200 TRX
0.0036%
51
Bybit
USDC-USDT$0.9995
0.0002574 Eth
$178,367,550.00
178,413,053.350 USDC
0.0010%
52
LATOKEN
BTC-USDT$0.9995
0.0002574 Eth
$173,144,904.00
1,678.515 BTC
0.0000%
53
BigONE
BTC-USDT$0.9997
0.0002578 Eth
$165,524,923.00
1,611.627 BTC
0.0000%
54
Bybit
SOL-USDT$0.9995
0.0002574 Eth
$164,556,638.00
750,418.295 SOL
0.0000%
55
LBank
ETH-USDT$0.9995
0.0002573 Eth
$161,732,080.00
41,652.052 ETH
0.0000%
56
Binance
ACT-USDT$1.001
0.0002573 Eth
$158,129,736.00
271,693,682.000 ACT
0.0015%
57
Gate.io
ETH-USDT$0.9995
0.0002574 Eth
$157,764,762.00
40,856.735 ETH
0.0000%
58
Bitget
DOGE-USDT$0.9995
0.0002574 Eth
$154,027,150.00
388,739,078.984 DOGE
0.0022%
59
Bitget
XRP-USDT$0.9995
0.0002574 Eth
$153,525,750.00
63,901,656.444 XRP
0.0004%
60
Binance
ADA-USDT$0.9999
0.0002580 Eth
$150,468,367.00
140,891,025.200 ADA
0.0008%
61
Bybit
XRP-USDT$0.9995
0.0002574 Eth
$149,579,610.00
62,280,435.690 XRP
0.0003%
62
Binance
AAVE-USDT$0.9997
0.0002578 Eth
$144,777,053.00
392,826.732 AAVE
0.0000%
63
LBank
SOL-USDT$0.9995
0.0002574 Eth
$144,049,530.00
656,915.825 SOL
0.0000%
64
LATOKEN
ETH-USDT$0.9996
0.0002574 Eth
$140,918,100.00
36,262.778 ETH
0.0000%
65
Biconomy.com
ETH-USDT$1.00
0.0002576 Eth
$132,330,861.00
34,204.676 ETH
0.0000%
66
BTSE
ETH-USDT$0.9999
0.0002578 Eth
$126,075,117.00
32,499.336 ETH
0.0000%
67
WhiteBIT
SOL-USDT$0.9995
0.0002573 Eth
$125,561,790.00
573,585.239 SOL
0.0000%
68
KuCoin
BTC-USDT$0.9995
0.0002574 Eth
$124,480,390.00
1,206.794 BTC
0.0000%
69
KuCoin
ETH-USDT$0.9995
0.0002574 Eth
$120,915,947.00
31,100.607 ETH
0.0000%
70
Binance
AVAX-USDT$0.9999
0.0002581 Eth
$119,009,033.00
2,375,018.360 AVAX
0.0000%
71
OKX
XRP-USDT$0.9995
0.0002574 Eth
$118,421,643.00
49,284,678.574 XRP
0.0003%
72
Gate.io
FLOKI-USDT$0.9995
0.0002573 Eth
$117,418,278.00
490,701,774,600.000 FLOKI
2.7517%
73
Gate.io
ENA-USDT$0.9995
0.0002573 Eth
$115,705,833.00
106,197,925.040 ENA
0.0006%
74
OKX
SOL-USDT$0.9995
0.0002574 Eth
$114,752,034.00
522,981.835 SOL
0.0000%
75
Kraken
USDT-USD$0.9996
0.0002571 Eth
$113,451,535.00
113,494,662.564 USDT
0.0006%
76
Gate.io
XRP-USDT$0.9995
0.0002574 Eth
$112,013,005.00
46,637,429.184 XRP
0.0003%
77
WhiteBIT
PEPE-USDT$0.9995
0.0002573 Eth
$109,858,142.00
4,675,711,657,517.000 PEPE
26.2199%
78
Binance
CRV-USDT$0.9995
0.0002574 Eth
$108,377,066.00
94,406,994.900 CRV
0.0005%
79
MEXC
DOGE-USDT$1.00
0.0002576 Eth
$107,824,351.00
268,210,890.750 DOGE
0.0015%
80
WhiteBIT
DOGE-USDT$0.9997
0.0002578 Eth
$104,409,115.00
260,306,608.800 DOGE
0.0015%
81
LBank
DOGE-USDT$0.9997
0.0002579 Eth
$103,012,605.00
256,864,993.000 DOGE
0.0014%
82
Binance
UNI-USDT$1.001
0.0002573 Eth
$102,363,167.00
6,142,492.990 UNI
0.0000%
83
Bybit
DOGE-USDT$0.9995
0.0002574 Eth
$100,195,919.00
253,003,747.000 DOGE
0.0014%
84
Binance
HBAR-USDT$0.9998
0.0002580 Eth
$99,942,407.00
342,174,098.000 HBAR
0.0019%
85
Binance
PNUT-USDT$0.9995
0.0002574 Eth
$99,199,834.00
87,053,480.800 PNUT
0.0005%
86
Bybit
MNT-USDT$0.9995
0.0002574 Eth
$94,468,001.00
77,421,827.360 MNT
0.0004%
87
Gate.io
DOGE-USDT$0.9995
0.0002574 Eth
$89,660,168.00
226,361,328.760 DOGE
0.0013%
88
CoinW
XRP-USDT$0.9997
0.0002578 Eth
$86,828,091.00
35,832,231.700 XRP
0.0002%
89
WhiteBIT
SUI-USDT$0.9997
0.0002578 Eth
$85,023,625.00
19,088,631.256 SUI
0.0001%
90
HTX
DOGE-USDT$1.00
0.0002573 Eth
$83,145,979.00
209,953,633.998 DOGE
0.0012%
91
DigiFinex
TRX-USDT$0.9995
0.0002574 Eth
$81,532,532.00
288,651,272.500 TRX
0.0016%
92
Binance
AVA-USDT$0.9999
0.0002580 Eth
$78,016,363.00
35,839,731.500 AVA
0.0002%
93
Bitget
SOL-USDT$0.9995
0.0002574 Eth
$75,201,618.00
342,713.995 SOL
0.0000%
94
Bitunix
DOGE-USDT$0.9995
0.0002573 Eth
$71,991,202.00
179,095,338.000 DOGE
0.0010%
95
Bitget
USDC-USDT$0.9995
0.0002574 Eth
$71,594,503.00
71,619,252.643 USDC
0.0004%
96
HTX
ETH-USDT$1.00
0.0002573 Eth
$66,090,731.00
17,094.899 ETH
0.0000%
97
Binance
NEIRO-USDT$0.9995
0.0002574 Eth
$61,577,594.00
38,526,935,865.000 NEIRO
0.2160%
98
Deepcoin
DOGE-USDT$0.9997
0.0002579 Eth
$59,651,823.00
154,681,950.205 DOGE
0.0009%
99
BingX
ETH-USDT$0.9995
0.0002574 Eth
$44,921,444.00
11,620.027 ETH
0.0000%
100
BingX
BTC-USDT$0.9995
0.0002574 Eth
$43,563,529.00
428.169 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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