ETH Price: $4,003.63 (-0.45%)

Token

Tether USD (USDT)
 

Overview

Max Total Supply

74,928,719,896.684091 USDT

Holders

6,519,973 ( 0.048%)

Market

Price

$1.00 @ 0.000250 ETH (+0.09%)

Onchain Market Cap

$75,003,648,616.58

Circulating Supply Market Cap

$137,843,111,086.00

Other Info

Token Contract (WITH 6 Decimals)

Balance
0 USDT

Value
$0.00
0x637e9ca29d5bf6cc69603da4eb1f3cacc2df6271
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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):$116,956,840,661.00
Market Capitalization:$137,843,111,086.00
Circulating Supply:137,704,486,652.00 USDT
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
Bybit
BTC-USDT$1.001
0.0002500 Eth
$2,047,246,816.00
20,458.693 BTC
0.0000%
2
Binance
BTC-USDT$1.001
0.0002500 Eth
$2,000,182,059.00
19,968.899 BTC
0.0000%
3
Pionex
BTC-USDT$1.001
0.0002500 Eth
$1,799,753,649.00
17,968.376 BTC
0.0000%
4
BVOX
BTC-USDT$1.001
0.0002500 Eth
$1,553,099,527.00
15,507.821 BTC
0.0000%
5
MEXC
BTC-USDT$1.001
0.0002500 Eth
$1,489,931,630.00
14,928.076 BTC
0.0000%
6
Binance
ETH-USDT$1.001
0.0002500 Eth
$1,478,153,563.00
368,040.524 ETH
0.0000%
7
Binance
DOGE-USDT$1.001
0.0002500 Eth
$1,444,340,821.00
3,224,246,672.000 DOGE
0.0062%
8
Binance
XRP-USDT$1.001
0.0002500 Eth
$1,372,594,676.00
559,847,199.000 XRP
0.0011%
9
Pionex
ETH-USDT$1.001
0.0002502 Eth
$1,363,401,594.00
339,612.741 ETH
0.0000%
10
WEEX
BTC-USDT$1.001
0.0002499 Eth
$1,218,048,033.00
12,149.824 BTC
0.0000%
11
Binance
FDUSD-USDT$1.001
0.0002498 Eth
$1,007,803,265.00
1,008,972,382.000 FDUSD
0.0019%
12
Toobit
ETH-USDT$1.001
0.0002502 Eth
$1,005,454,240.00
250,291.778 ETH
0.0000%
13
MEXC
ETH-USDT$1.001
0.0002500 Eth
$956,784,724.00
239,050.798 ETH
0.0000%
14
AscendEX (BitMax)
BTC-USDT$1.001
0.0002500 Eth
$938,223,716.00
9,400.420 BTC
0.0000%
15
WhiteBIT
BTC-USDT$1.001
0.0002500 Eth
$933,483,341.00
9,353.480 BTC
0.0000%
16
Binance
PEPE-USDT$1.001
0.0002500 Eth
$806,469,250.00
35,489,659,220,190.000 PEPE
68.1615%
17
Bybit
ETH-USDT$1.001
0.0002500 Eth
$751,998,857.00
187,166.149 ETH
0.0000%
18
P2B
BTC-USDT$1.001
0.0002501 Eth
$749,499,914.00
7,512.698 BTC
0.0000%
19
DigiFinex
BTC-USDT$1.001
0.0002500 Eth
$743,652,105.00
7,451.886 BTC
0.0000%
20
LBank
BTC-USDT$1.001
0.0002500 Eth
$742,588,834.00
7,441.427 BTC
0.0000%
21
BVOX
ETH-USDT$1.001
0.0002500 Eth
$687,681,387.00
171,223.868 ETH
0.0000%
22
Bitget
ETH-USDT$1.001
0.0002500 Eth
$614,805,768.00
153,065.179 ETH
0.0000%
23
Ourbit
ETH-USDT$1.001
0.0002500 Eth
$584,693,796.00
145,651.087 ETH
0.0000%
24
CoinW
ETH-USDT$1.001
0.0002503 Eth
$565,441,994.00
141,303.844 ETH
0.0000%
25
Bitunix
BTC-USDT$1.001
0.0002500 Eth
$560,552,509.00
5,616.866 BTC
0.0000%
26
OKX
DOGE-USDT$1.001
0.0002500 Eth
$542,148,811.00
1,210,950,555.114 DOGE
0.0023%
27
Bitget
BTC-USDT$1.001
0.0002500 Eth
$534,447,510.00
5,338.120 BTC
0.0000%
28
DigiFinex
ETH-USDT$1.001
0.0002500 Eth
$533,893,167.00
133,383.163 ETH
0.0000%
29
BitMart
ETH-USDT$1.001
0.0002500 Eth
$518,613,232.00
129,561.753 ETH
0.0000%
30
AscendEX (BitMax)
ETH-USDT$1.001
0.0002500 Eth
$515,579,781.00
128,786.070 ETH
0.0000%
31
OKX
BTC-USDT$1.001
0.0002500 Eth
$502,644,179.00
5,021.410 BTC
0.0000%
32
Deepcoin
ETH-USDT$1.001
0.0002500 Eth
$484,651,615.00
129,914.897 ETH
0.0000%
33
BitMart
BTC-USDT$1.001
0.0002500 Eth
$469,009,787.00
4,698.524 BTC
0.0000%
34
XT.COM
BTC-USDT$1.001
0.0002500 Eth
$458,428,840.00
4,575.086 BTC
0.0000%
35
WhiteBIT
ETH-USDT$1.001
0.0002498 Eth
$448,105,435.00
111,823.153 ETH
0.0000%
36
XT.COM
ETH-USDT$1.001
0.0002500 Eth
$410,736,646.00
102,257.873 ETH
0.0000%
37
OKX
ETH-USDT$1.001
0.0002500 Eth
$401,769,117.00
100,067.429 ETH
0.0000%
38
Azbit
BTC-USDT$1.001
0.0002500 Eth
$398,936,155.00
3,990.272 BTC
0.0000%
39
Hotcoin
ETH-USDT$1.001
0.0002500 Eth
$381,314,913.00
95,245.387 ETH
0.0000%
40
Binance
1MBABYDOGE-USDT$1.001
0.0002498 Eth
$374,802,717.00
98,360,083,022.000 1MBABYDOGE
0.1889%
41
Binance
BNB-USDT$1.001
0.0002498 Eth
$356,395,830.00
479,547.163 BNB
0.0000%
42
MEXC
XRP-USDT$1.001
0.0002500 Eth
$352,668,537.00
142,179,936.500 XRP
0.0003%
43
Bybit
XRP-USDT$1.001
0.0002500 Eth
$337,867,213.00
138,075,850.760 XRP
0.0003%
44
Bitunix
ETH-USDT$1.001
0.0002500 Eth
$332,166,768.00
82,975.825 ETH
0.0000%
45
Bitget
XRP-USDT$1.001
0.0002500 Eth
$321,752,909.00
131,344,210.423 XRP
0.0003%
46
Binance
TRX-USDT$1.001
0.0002499 Eth
$318,999,396.00
982,503,662.400 TRX
0.0019%
47
Binance
SUI-USDT$1.001
0.0002500 Eth
$297,936,604.00
69,352,576.600 SUI
0.0001%
48
Bitget
BGB-USDT$1.001
0.0002500 Eth
$297,528,365.00
110,732,003.358 BGB
0.0002%
49
Bitget
DOGE-USDT$1.001
0.0002500 Eth
$293,728,137.00
656,339,008.623 DOGE
0.0013%
50
HTX
BTC-USDT$1.001
0.0002500 Eth
$286,409,332.00
2,855.185 BTC
0.0000%
51
Gate.io
XRP-USDT$1.001
0.0002500 Eth
$282,102,164.00
114,964,978.445 XRP
0.0002%
52
MEXC
DOGE-USDT$1.001
0.0002500 Eth
$279,938,643.00
609,319,407.820 DOGE
0.0012%
53
Binance
NEIRO-USDT$1.001
0.0002500 Eth
$266,506,240.00
139,814,610,666.000 NEIRO
0.2685%
54
Coinstore
ETH-USDT$1.001
0.0002500 Eth
$265,097,243.00
66,001.292 ETH
0.0000%
55
LATOKEN
BTC-USDT$1.001
0.0002500 Eth
$250,151,144.00
2,506.392 BTC
0.0000%
56
Binance
PNUT-USDT$1.001
0.0002500 Eth
$249,400,235.00
175,157,953.400 PNUT
0.0003%
57
Binance
SHIB-USDT$1.001
0.0002499 Eth
$241,752,868.00
7,720,219,028,926.000 SHIB
14.8275%
58
BigONE
BTC-USDT$1.001
0.0002500 Eth
$239,742,031.00
2,401.979 BTC
0.0000%
59
Biconomy.com
BTC-USDT$1.001
0.0002500 Eth
$236,527,716.00
2,363.205 BTC
0.0000%
60
OKX
XRP-USDT$1.001
0.0002500 Eth
$229,570,232.00
93,623,518.823 XRP
0.0002%
61
Gate.io
DOGE-USDT$1.001
0.0002500 Eth
$220,999,929.00
493,539,176.490 DOGE
0.0009%
62
Gate.io
BTC-USDT$1.001
0.0002500 Eth
$217,311,435.00
2,169.633 BTC
0.0000%
63
Gate.io
HBAR-USDT$1.001
0.0002500 Eth
$213,526,947.00
625,035,354.590 HBAR
0.0012%
64
Bybit
DOGE-USDT$1.001
0.0002500 Eth
$205,254,567.00
458,340,988.200 DOGE
0.0009%
65
Binance
FLOKI-USDT$1.001
0.0002498 Eth
$204,229,657.00
798,149,712,519.000 FLOKI
1.5329%
66
Bybit
SOL-USDT$1.001
0.0002500 Eth
$196,474,542.00
823,294.330 SOL
0.0000%
67
Coinbase Exchange
USDT-USDC$1.001
0.0002500 Eth
$195,888,658.00
195,723,046.560 USDT
0.0004%
68
Binance
UNI-USDT$1.001
0.0002500 Eth
$194,246,133.00
10,909,830.920 UNI
0.0000%
69
Bybit
USDC-USDT$1.001
0.0002500 Eth
$188,032,864.00
188,125,279.390 USDC
0.0004%
70
DigiFinex
DOGE-USDT$1.001
0.0002500 Eth
$180,681,252.00
393,937,593.820 DOGE
0.0008%
71
Gate.io
PEPE-USDT$1.001
0.0002500 Eth
$176,736,574.00
7,785,464,247,171.000 PEPE
14.9528%
72
Gate.io
ETH-USDT$1.001
0.0002500 Eth
$173,872,305.00
43,284.635 ETH
0.0000%
73
WhiteBIT
HBAR-USDT$1.001
0.0002498 Eth
$172,254,090.00
523,006,319.720 HBAR
0.0010%
74
Binance
CRV-USDT$1.001
0.0002500 Eth
$168,160,493.00
136,313,555.000 CRV
0.0003%
75
HTX
DOGE-USDT$1.001
0.0002500 Eth
$166,233,163.00
374,122,795.502 DOGE
0.0007%
76
KuCoin
BTC-USDT$1.001
0.0002500 Eth
$163,826,115.00
1,641.458 BTC
0.0000%
77
Binance
ACX-USDT$1.001
0.0002500 Eth
$160,579,939.00
156,725,716.100 ACX
0.0003%
78
Binance
TURBO-USDT$1.001
0.0002500 Eth
$157,833,802.00
14,767,571,253.000 TURBO
0.0284%
79
WhiteBIT
SOL-USDT$1.001
0.0002500 Eth
$155,593,918.00
643,654.892 SOL
0.0000%
80
OKX
SOL-USDT$1.001
0.0002500 Eth
$154,459,253.00
646,985.949 SOL
0.0000%
81
LBank
SOL-USDT$1.001
0.0002500 Eth
$152,682,127.00
630,117.316 SOL
0.0000%
82
Binance
FTM-USDT$1.001
0.0002501 Eth
$147,463,391.00
109,215,717.000 FTM
0.0002%
83
Binance
DYDX-USDT$1.001
0.0002500 Eth
$144,664,665.00
59,232,929.840 DYDX
0.0001%
84
KuCoin
XRP-USDT$1.001
0.0002500 Eth
$138,954,559.00
55,934,265.664 XRP
0.0001%
85
BTSE
XRP-USDT$1.001
0.0002499 Eth
$132,096,557.00
53,315,708.682 XRP
0.0001%
86
LBank
DOGE-USDT$1.001
0.0002500 Eth
$130,218,365.00
283,083,187.000 DOGE
0.0005%
87
Deepcoin
SOL-USDT$1.001
0.0002500 Eth
$129,226,730.00
569,704.673 SOL
0.0000%
88
Binance
RSR-USDT$1.001
0.0002498 Eth
$124,435,285.00
6,750,559,224.300 RSR
0.0130%
89
KuCoin
ETH-USDT$1.001
0.0002500 Eth
$114,394,430.00
28,576.421 ETH
0.0000%
90
Deepcoin
DOGE-USDT$1.001
0.0002500 Eth
$110,986,458.00
240,049,753.205 DOGE
0.0005%
91
Binance
NEAR-USDT$1.001
0.0002500 Eth
$104,694,464.00
13,300,928.900 NEAR
0.0000%
92
WhiteBIT
SUI-USDT$1.001
0.0002500 Eth
$97,622,547.00
22,906,964.487 SUI
0.0000%
93
Binance
SAND-USDT$1.001
0.0002500 Eth
$97,211,722.00
107,240,853.000 SAND
0.0002%
94
Binance
FIL-USDT$1.001
0.0002500 Eth
$96,021,156.00
12,002,917.030 FIL
0.0000%
95
OrangeX
ETH-USDT$1.001
0.0002499 Eth
$94,799,006.00
23,635.464 ETH
0.0000%
96
HTX
ETH-USDT$1.001
0.0002500 Eth
$86,746,165.00
21,584.722 ETH
0.0000%
97
Binance
AAVE-USDT$1.001
0.0002499 Eth
$85,301,536.00
299,055.307 AAVE
0.0000%
98
WhiteBIT
ADA-USDT$1.001
0.0002503 Eth
$84,609,230.00
70,272,675.180 ADA
0.0001%
99
BYDFi
BTC-USDT$1.001
0.0002498 Eth
$83,361,834.00
835.069 BTC
0.0000%
100
KuCoin
SOL-USDT$1.001
0.0002500 Eth
$79,982,567.00
330,403.926 SOL
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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