ETH Price: $2,420.95 (+3.55%)

Token

Tether USD (USDT)
 

Overview

Max Total Supply

53,981,730,120.39639 USDT

Holders

6,062,195 ( 0.032%)

Market

Price

$1.00 @ 0.000413 ETH (+0.08%)

Onchain Market Cap

$53,981,730,120.40

Circulating Supply Market Cap

$118,500,391,448.00

Other Info

Token Contract (WITH 6 Decimals)

Balance
26 USDT

Value
$26.00 ( ~0.0107395752692993 Eth) [0.0000%]
0x888e1c2ffb31c98f23db0ae92b343438aec77d5d
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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):$46,387,557,267.00
Market Capitalization:$118,500,391,448.00
Circulating Supply:118,581,493,585.00 USDT
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
Binance
BTC-USDT$1.00
0.0004135 Eth
$1,810,277,254.00
30,501.845 BTC
0.0009%
2
Bybit
BTC-USDT$1.00
0.0004137 Eth
$1,416,704,464.00
23,968.279 BTC
0.0007%
3
Binance
USDC-USDT$1.00
0.0004137 Eth
$1,143,943,875.00
1,143,738,948.000 USDC
34.5375%
4
CoinW
BTC-USDT$1.00
0.0004135 Eth
$831,146,863.00
13,843.572 BTC
0.0004%
5
MEXC
BTC-USDT$1.00
0.0004132 Eth
$673,146,069.00
11,217.501 BTC
0.0003%
6
WhiteBIT
BTC-USDT$1.00
0.0004132 Eth
$666,129,515.00
11,101.112 BTC
0.0003%
7
Binance
FDUSD-USDT$1.00
0.0004137 Eth
$655,578,573.00
655,169,378.000 FDUSD
19.7842%
8
Binance
ETH-USDT$1.00
0.0004135 Eth
$634,826,581.00
264,241.727 ETH
0.0080%
9
FameEX
BTC-USDT$1.00
0.0004132 Eth
$634,191,673.00
10,688.586 BTC
0.0003%
10
OKX
BTC-USDT$1.00
0.0004135 Eth
$535,139,834.00
9,005.975 BTC
0.0003%
11
LBank
BTC-USDT$1.00
0.0004132 Eth
$501,773,509.00
8,361.540 BTC
0.0003%
12
Tapbit
ETH-USDT$1.00
0.0004135 Eth
$493,146,459.00
205,317.926 ETH
0.0062%
13
Toobit
ETH-USDT$1.00
0.0004132 Eth
$427,371,290.00
177,931.859 ETH
0.0054%
14
Bybit
ETH-USDT$1.00
0.0004137 Eth
$417,980,970.00
174,171.280 ETH
0.0053%
15
LBank
ETH-USDT$1.00
0.0004132 Eth
$399,658,969.00
165,119.833 ETH
0.0050%
16
Binance
SOL-USDT$1.00
0.0004133 Eth
$387,115,710.00
2,840,471.418 SOL
0.0858%
17
HTX
BTC-USDT$1.00
0.0004135 Eth
$285,860,873.00
4,822.126 BTC
0.0001%
18
AscendEX (BitMax)
BTC-USDT$1.00
0.0004135 Eth
$278,950,053.00
4,648.503 BTC
0.0001%
19
Bitget
BTC-USDT$1.00
0.0004137 Eth
$239,255,706.00
4,037.607 BTC
0.0001%
20
LATOKEN
BTC-USDT$1.00
0.0004135 Eth
$233,733,163.00
3,896.219 BTC
0.0001%
21
OKX
ETH-USDT$1.00
0.0004137 Eth
$215,492,607.00
89,524.363 ETH
0.0027%
22
BigONE
BTC-USDT$1.00
0.0004135 Eth
$212,300,660.00
3,537.130 BTC
0.0001%
23
BitMart
ETH-USDT$1.00
0.0004135 Eth
$204,248,025.00
84,444.997 ETH
0.0025%
24
Gate.io
BTC-USDT$1.00
0.0004135 Eth
$196,482,081.00
3,319.886 BTC
0.0001%
25
Kraken
USDT-USD$1.00
0.0004135 Eth
$173,075,302.00
173,011,287.972 USDT
5.2244%
26
MEXC
ETH-USDT$1.00
0.0004132 Eth
$171,164,398.00
70,739.858 ETH
0.0021%
27
Binance
BNB-USDT$1.00
0.0004137 Eth
$159,737,336.00
289,885.463 BNB
0.0088%
28
Bitget
ETH-USDT$1.00
0.0004137 Eth
$141,253,176.00
58,832.506 ETH
0.0018%
29
Binance
XRP-USDT$1.001
0.0004136 Eth
$135,776,171.00
238,401,642.000 XRP
7.1990%
30
HTX
ETH-USDT$1.00
0.0004135 Eth
$106,880,050.00
44,550.395 ETH
0.0013%
31
Bybit
USDC-USDT$1.00
0.0004137 Eth
$98,255,934.00
98,235,037.520 USDC
2.9664%
32
OKX
SOL-USDT$1.00
0.0004137 Eth
$71,500,343.00
523,733.078 SOL
0.0158%
33
Bitget
SOL-USDT$1.00
0.0004137 Eth
$65,115,891.00
477,236.584 SOL
0.0144%
34
DigiFinex
USDC-USDT$1.00
0.0004135 Eth
$49,486,152.00
49,501,251.000 USDC
1.4948%
35
P2B
BNB-USDT$1.00
0.0004135 Eth
$42,421,448.00
76,707.630 BNB
0.0023%
36
WhiteBIT
DOGE-USDT$1.00
0.0004132 Eth
$35,328,230.00
330,888,692.000 DOGE
9.9918%
37
WhiteBIT
XRP-USDT$1.00
0.0004132 Eth
$34,690,896.00
60,115,118.200 XRP
1.8153%
38
WhiteBIT
SOL-USDT$1.00
0.0004132 Eth
$33,681,426.00
243,812.868 SOL
0.0074%
39
FMFW.io
BTC-USDT$1.00
0.0004135 Eth
$26,924,878.00
448.683 BTC
0.0000%
40
WhiteBIT
NEAR-USDT$1.00
0.0004132 Eth
$26,544,213.00
6,278,624.550 NEAR
0.1896%
41
Bitfinex
BTC-USDT$1.00
0.0004134 Eth
$25,975,315.00
432.944 BTC
0.0000%
42
DigiFinex
SOL-USDT$1.00
0.0004135 Eth
$24,368,654.00
176,550.140 SOL
0.0053%
43
BVOX
BNB-USDT$1.00
0.0004132 Eth
$23,386,617.00
42,411.512 BNB
0.0013%
44
Fastex
ETH-USDT$1.00
0.0004136 Eth
$22,489,384.00
9,295.775 ETH
0.0003%
45
Gate.io
SOL-USDT$1.00
0.0004135 Eth
$20,595,894.00
151,099.539 SOL
0.0046%
46
Toobit
SOL-USDT$1.00
0.0004132 Eth
$19,251,894.00
141,251.690 SOL
0.0043%
47
Bitget
TON-USDT$1.00
0.0004135 Eth
$18,954,497.00
3,318,372.080 TON
0.1002%
48
Azbit
SOL-USDT$1.00
0.0004135 Eth
$18,674,355.00
136,775.633 SOL
0.0041%
49
Gate.io
DOGE-USDT$1.00
0.0004135 Eth
$16,231,709.00
152,678,613.640 DOGE
4.6104%
50
FMFW.io
ETH-USDT$1.00
0.0004134 Eth
$15,352,116.00
6,345.803 ETH
0.0002%
51
Toobit
XRP-USDT$1.00
0.0004132 Eth
$14,610,664.00
25,662,598.000 XRP
0.7749%
52
BingX
FDUSD-USDT$1.00
0.0004135 Eth
$12,346,930.00
12,339,339.042 FDUSD
0.3726%
53
OKX
USDC-USDT$1.00
0.0004137 Eth
$10,595,024.00
10,592,732.256 USDC
0.3199%
54
Gate.io
TON-USDT$1.00
0.0004135 Eth
$9,405,718.00
1,636,497.580 TON
0.0494%
55
Bit2Me
TON-USDT$1.00
0.0004133 Eth
$9,398,531.00
1,635,954.190 TON
0.0494%
56
Toobit
DOGE-USDT$1.00
0.0004132 Eth
$9,371,457.00
88,056,735.000 DOGE
2.6590%
57
Tapbit
XRP-USDT$1.00
0.0004135 Eth
$8,992,585.00
15,793,743.040 XRP
0.4769%
58
FMFW.io
USDT-USDC$1.00
0.0004135 Eth
$8,348,098.00
8,344,978.000 USDT
0.2520%
59
Gate.io
SUI-USDT$1.00
0.0004135 Eth
$8,347,416.00
8,148,191.350 SUI
0.2461%
60
Gate.io
XRP-USDT$1.00
0.0004135 Eth
$8,205,166.00
14,410,625.680 XRP
0.4352%
61
Gate.io
BNB-USDT$1.00
0.0004135 Eth
$7,711,550.00
13,997.356 BNB
0.0004%
62
Gate.io
ICP-USDT$1.00
0.0004135 Eth
$7,468,010.00
882,742.110 ICP
0.0267%
63
Bit2Me
ICP-USDT$1.00
0.0004133 Eth
$7,465,263.00
882,853.930 ICP
0.0267%
64
WhiteBIT
DOT-USDT$1.00
0.0004132 Eth
$7,167,132.00
1,630,914.633 DOT
0.0492%
65
WOO X
BTC-USDT$1.00
0.0004132 Eth
$7,136,107.00
118.911 BTC
0.0000%
66
BingX
SOL-USDT$1.00
0.0004135 Eth
$7,044,083.00
51,672.276 SOL
0.0016%
67
MEXC
USDC-USDT$1.00
0.0004132 Eth
$7,019,182.00
7,020,477.000 USDC
0.2120%
68
OrangeX
XRP-USDT$1.00
0.0004132 Eth
$6,965,141.00
12,239,158.000 XRP
0.3696%
69
Gate.io
NEAR-USDT$1.00
0.0004135 Eth
$6,767,446.00
1,590,939.010 NEAR
0.0480%
70
Bitget
USDC-USDT$1.00
0.0004137 Eth
$6,264,042.00
6,262,918.355 USDC
0.1891%
71
OrangeX
SOL-USDT$1.00
0.0004132 Eth
$6,022,581.00
44,216.870 SOL
0.0013%
72
WEEX
BNB-USDT$1.00
0.0004135 Eth
$5,806,148.00
10,531.283 BNB
0.0003%
73
DigiFinex
XRP-USDT$1.00
0.0004135 Eth
$5,471,572.00
9,474,541.000 XRP
0.2861%
74
DigiFinex
AAVE-USDT$1.00
0.0004135 Eth
$5,441,879.00
38,864.092 AAVE
0.0012%
75
Gate.io
PEOPLE-USDT$1.00
0.0004135 Eth
$4,672,813.00
79,762,559.300 PEOPLE
2.4086%
76
Gate.io
LINK-USDT$1.00
0.0004135 Eth
$4,626,670.00
414,040.770 LINK
0.0125%
77
Gate.io
TIA-USDT$1.00
0.0004135 Eth
$4,137,043.00
938,928.680 TIA
0.0284%
78
Gate.io
USDC-USDT$1.00
0.0004135 Eth
$3,917,938.00
3,918,216.423 USDC
0.1183%
79
Tapbit
BNB-USDT$1.00
0.0004135 Eth
$3,891,092.00
7,057.142 BNB
0.0002%
80
Kraken
USDC-USDT$1.00
0.0004135 Eth
$3,850,534.00
3,851,323.124 USDC
0.1163%
81
Bit2Me
USDC-USDT$1.00
0.0004133 Eth
$3,772,075.00
3,774,345.662 USDC
0.1140%
82
Gate.io
ENS-USDT$1.00
0.0004135 Eth
$3,659,913.00
206,781.740 ENS
0.0062%
83
Gate.io
FLOW-USDT$1.00
0.0004135 Eth
$3,454,291.00
6,160,426.580 FLOW
0.1860%
84
Gate.io
FIL-USDT$1.00
0.0004135 Eth
$3,448,014.00
930,795.890 FIL
0.0281%
85
Gate.io
BCH-USDT$1.00
0.0004135 Eth
$3,185,277.00
9,535.105 BCH
0.0003%
86
Gate.io
AVAX-USDT$1.00
0.0004135 Eth
$3,120,917.00
128,376.438 AVAX
0.0039%
87
WOO X
SOL-USDT$1.00
0.0004132 Eth
$2,981,586.00
21,576.020 SOL
0.0007%
88
Bybit
USDE-USDT$1.00
0.0004137 Eth
$2,930,448.00
2,933,165.400 USDE
0.0886%
89
Gate.io
JUP-USDT$1.00
0.0004135 Eth
$2,716,751.00
3,545,529.360 JUP
0.1071%
90
Gate.io
ETC-USDT$1.00
0.0004135 Eth
$2,664,535.00
142,707.401 ETC
0.0043%
91
Gate.io
DOT-USDT$1.00
0.0004135 Eth
$2,627,063.00
598,510.380 DOT
0.0181%
92
Gate.io
TRX-USDT$1.00
0.0004135 Eth
$2,393,613.00
16,016,433.470 TRX
0.4836%
93
WOO X
ETH-USDT$1.00
0.0004132 Eth
$2,155,503.00
890.721 ETH
0.0000%
94
Gate.io
LTC-USDT$1.00
0.0004135 Eth
$2,104,063.00
32,665.404 LTC
0.0010%
95
Gate.io
ADA-USDT$1.00
0.0004135 Eth
$2,027,743.00
5,652,535.910 ADA
0.1707%
96
Gate.io
ASTR-USDT$1.00
0.0004135 Eth
$1,754,812.00
29,881,990.070 ASTR
0.9023%
97
Gate.io
ARB-USDT$1.00
0.0004135 Eth
$1,542,723.00
2,915,055.270 ARB
0.0880%
98
Fastex
FTN-USDT$1.00
0.0004136 Eth
$1,326,212.00
522,930.723 FTN
0.0158%
99
Gate.io
APT-USDT$1.00
0.0004135 Eth
$792,411.00
127,254.680 APT
0.0038%
100
Gate.io
XLM-USDT$1.00
0.0004135 Eth
$421,624.00
4,396,556.720 XLM
0.1328%

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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