ETH Price: $2,327.62 (-6.45%)

Token

Tether USD (USDT)
 

Overview

Max Total Supply

76,918,584,460.692261 USDT

Holders

6,941,588 ( 0.004%)

Market

Price

$1.00 @ 0.000429 ETH (+0.01%)

Onchain Market Cap

$76,822,974,660.21

Circulating Supply Market Cap

$142,127,742,683.00

Other Info

Token Contract (WITH 6 Decimals)

Balance
5.378928 USDT

Value
$5.37 ( ~0.00230707458619763 Eth) [0.0000%]
0x58ce686427a9809ec11f58209e6b33c0f3143ee2
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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):$113,167,945,249.00
Market Capitalization:$142,127,742,683.00
Circulating Supply:142,304,613,957.00 USDT
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
Binance
BTC-USDT$0.9989
0.0004269 Eth
$5,144,003,231.00
60,009.647 BTC
0.0005%
2
FameEX
BTC-USDT$0.9989
0.0004262 Eth
$4,207,110,092.00
49,075.584 BTC
0.0004%
3
Pionex
BTC-USDT$0.9987
0.0004263 Eth
$3,395,812,624.00
39,487.067 BTC
0.0003%
4
OrangeX
BTC-USDT$0.9987
0.0004263 Eth
$2,667,422,923.00
31,140.013 BTC
0.0003%
5
Crypto.com Exchange
BTC-USDT$0.9995
0.0004271 Eth
$1,857,919,604.00
21,910.322 BTC
0.0002%
6
Binance
USDC-USDT$0.9994
0.0004265 Eth
$1,784,574,609.00
1,783,904,445.000 USDC
14.9818%
7
CoinW
BTC-USDT$0.9988
0.0004264 Eth
$1,723,983,012.00
20,334.986 BTC
0.0002%
8
Bybit
BTC-USDT$0.9989
0.0004268 Eth
$1,715,786,339.00
19,997.720 BTC
0.0002%
9
BitMart
BTC-USDT$0.9982
0.0004265 Eth
$1,652,589,978.00
19,493.292 BTC
0.0002%
10
OKX
BTC-USDT$0.9989
0.0004269 Eth
$1,603,121,995.00
18,686.446 BTC
0.0002%
11
FameEX
ETH-USDT$0.9988
0.0004264 Eth
$1,577,396,593.00
664,807.603 ETH
0.0056%
12
Toobit
BTC-USDT$0.9988
0.0004269 Eth
$1,508,834,958.00
17,577.880 BTC
0.0001%
13
Tapbit
ETH-USDT$0.9984
0.0004264 Eth
$1,374,617,783.00
578,161.142 ETH
0.0049%
14
Crypto.com Exchange
ETH-USDT$0.9995
0.0004270 Eth
$1,312,259,375.00
561,311.646 ETH
0.0047%
15
Bitget
BTC-USDT$0.9989
0.0004268 Eth
$1,268,679,162.00
14,805.138 BTC
0.0001%
16
DigiFinex
BTC-USDT$0.9982
0.0004265 Eth
$1,222,393,302.00
14,442.755 BTC
0.0001%
17
LATOKEN
BTC-USDT$0.9984
0.0004264 Eth
$1,125,725,855.00
13,293.291 BTC
0.0001%
18
Hotcoin
BTC-USDT$0.9987
0.0004261 Eth
$1,062,027,012.00
12,524.442 BTC
0.0001%
19
Gate.io
PI-USDT$0.9984
0.0004264 Eth
$982,264,852.00
426,440,806.560 PI
3.5814%
20
P2B
BTC-USDT$0.9984
0.0004264 Eth
$944,853,452.00
11,140.480 BTC
0.0001%
21
Bitget
PI-USDT$0.9989
0.0004268 Eth
$909,313,607.00
383,923,807.090 PI
3.2243%
22
AscendEX (BitMax)
BTC-USDT$0.9988
0.0004269 Eth
$891,597,921.00
10,534.623 BTC
0.0001%
23
OKX
PI-USDT$0.9988
0.0004269 Eth
$863,352,073.00
365,700,233.184 PI
3.0713%
24
Binance
FDUSD-USDT$0.9989
0.0004264 Eth
$805,537,593.00
806,199,209.000 FDUSD
6.7707%
25
Toobit
ETH-USDT$0.9987
0.0004262 Eth
$772,662,404.00
325,392.855 ETH
0.0027%
26
Binance
SOL-USDT$0.9984
0.0004262 Eth
$745,827,285.00
5,466,378.212 SOL
0.0459%
27
Gate.io
BTC-USDT$0.9984
0.0004264 Eth
$729,193,120.00
8,506.296 BTC
0.0001%
28
Bitunix
BTC-USDT$0.9988
0.0004269 Eth
$712,203,622.00
8,412.982 BTC
0.0001%
29
Bybit
IP-USDT$0.9989
0.0004268 Eth
$638,332,583.00
101,419,057.700 IP
0.8518%
30
OKX
ETH-USDT$0.9988
0.0004269 Eth
$636,642,227.00
268,297.269 ETH
0.0023%
31
Bitget
ETH-USDT$0.9989
0.0004268 Eth
$610,858,403.00
258,343.841 ETH
0.0022%
32
Gate.io
ETH-USDT$0.9984
0.0004264 Eth
$569,192,015.00
240,242.389 ETH
0.0020%
33
Bitget
IP-USDT$0.9989
0.0004268 Eth
$538,426,652.00
84,985,503.280 IP
0.7137%
34
Bybit
ETH-USDT$0.9989
0.0004268 Eth
$501,374,095.00
212,714.459 ETH
0.0018%
35
HTX
BTC-USDT$0.9988
0.0004269 Eth
$497,707,460.00
5,782.408 BTC
0.0000%
36
CoinW
ETH-USDT$0.9988
0.0004264 Eth
$495,449,134.00
211,937.524 ETH
0.0018%
37
AscendEX (BitMax)
ETH-USDT$0.9988
0.0004269 Eth
$487,161,375.00
209,089.813 ETH
0.0018%
38
BitMart
ETH-USDT$0.9982
0.0004265 Eth
$463,242,612.00
197,945.665 ETH
0.0017%
39
Coinbase Exchange
USDT-USD$0.9987
0.0004268 Eth
$454,526,962.00
455,104,945.560 USDT
3.8221%
40
Bitget
BGB-USDT$0.9989
0.0004268 Eth
$450,473,560.00
110,658,353.064 BGB
0.9293%
41
Binance
KAITO-USDT$0.9992
0.0004271 Eth
$432,943,283.00
196,369,660.700 KAITO
1.6492%
42
LBank
BTC-USDT$0.9988
0.0004263 Eth
$425,485,824.00
5,015.937 BTC
0.0000%
43
KuCoin
BTC-USDT$0.9988
0.0004269 Eth
$421,422,546.00
4,979.322 BTC
0.0000%
44
OrangeX
ETH-USDT$0.9987
0.0004263 Eth
$400,145,084.00
168,511.203 ETH
0.0014%
45
Biconomy.com
BTC-USDT$0.9988
0.0004264 Eth
$376,615,081.00
4,378.836 BTC
0.0000%
46
Binance
DOGE-USDT$0.999
0.0004264 Eth
$324,424,026.00
1,582,393,376.000 DOGE
13.2895%
47
Binance
SUI-USDT$0.9988
0.0004264 Eth
$322,229,759.00
110,628,563.200 SUI
0.9291%
48
Binance
LTC-USDT$0.9988
0.0004264 Eth
$305,249,221.00
2,457,926.833 LTC
0.0206%
49
DigiFinex
ETH-USDT$0.9982
0.0004265 Eth
$302,414,646.00
129,655.624 ETH
0.0011%
50
Hotcoin
ETH-USDT$0.9987
0.0004261 Eth
$278,958,774.00
119,164.651 ETH
0.0010%
51
Binance
BNB-USDT$0.9984
0.0004262 Eth
$263,262,472.00
429,701.889 BNB
0.0036%
52
Coinstore
BTC-USDT$0.9988
0.0004264 Eth
$250,124,158.00
2,885.722 BTC
0.0000%
53
Bitunix
ETH-USDT$0.9988
0.0004269 Eth
$239,845,363.00
102,925.378 ETH
0.0009%
54
KuCoin
ETH-USDT$0.9988
0.0004269 Eth
$239,707,009.00
102,899.526 ETH
0.0009%
55
OKX
KAITO-USDT$0.9988
0.0004269 Eth
$231,436,453.00
105,361,310.677 KAITO
0.8849%
56
FameEX
SOL-USDT$0.9989
0.0004262 Eth
$230,103,749.00
1,685,417.580 SOL
0.0142%
57
Binance
TRX-USDT$0.9989
0.0004264 Eth
$227,353,781.00
1,000,192,487.200 TRX
8.4000%
58
Bitget
SOL-USDT$0.9989
0.0004268 Eth
$225,249,988.00
1,657,428.664 SOL
0.0139%
59
OKX
IP-USDT$0.9988
0.0004269 Eth
$222,383,100.00
33,328,895.252 IP
0.2799%
60
OKX
SOL-USDT$0.9988
0.0004269 Eth
$211,171,191.00
1,550,698.099 SOL
0.0130%
61
Bybit
SOL-USDT$0.9989
0.0004268 Eth
$207,553,286.00
1,523,382.032 SOL
0.0128%
62
Bitfinex
BTC-USDT$1.001
0.0004276 Eth
$204,398,132.00
2,409.342 BTC
0.0000%
63
Bybit
XRP-USDT$0.9989
0.0004268 Eth
$192,231,071.00
86,337,198.020 XRP
0.7251%
64
Bitget
XRP-USDT$0.9989
0.0004268 Eth
$187,856,200.00
84,446,118.200 XRP
0.7092%
65
Biconomy.com
ETH-USDT$0.9988
0.0004264 Eth
$183,414,261.00
77,036.561 ETH
0.0006%
66
Gate.io
XRP-USDT$0.9984
0.0004264 Eth
$170,884,457.00
76,756,037.260 XRP
0.6446%
67
LBank
USDC-USDT$0.9987
0.0004262 Eth
$159,399,074.00
159,440,009.610 USDC
1.3390%
68
Bybit
USDC-USDT$0.9989
0.0004268 Eth
$155,961,323.00
155,971,352.400 USDC
1.3099%
69
Bitget
KAITO-USDT$0.9989
0.0004268 Eth
$155,742,598.00
70,586,981.690 KAITO
0.5928%
70
HTX
ETH-USDT$0.9988
0.0004269 Eth
$153,022,977.00
64,506.764 ETH
0.0005%
71
OKX
DOGE-USDT$0.9988
0.0004269 Eth
$152,269,547.00
739,903,036.843 DOGE
6.2140%
72
Gate.io
SOL-USDT$0.9982
0.0004265 Eth
$144,416,992.00
1,061,657.372 SOL
0.0089%
73
Binance
S-USDT$0.9987
0.0004261 Eth
$134,672,503.00
187,795,667.400 S
1.5772%
74
Hibt
ETH-USDT$0.9988
0.0004264 Eth
$133,582,890.00
56,296.963 ETH
0.0005%
75
CoinEx
BTC-USDT$0.9987
0.0004261 Eth
$128,161,274.00
1,501.216 BTC
0.0000%
76
Binance
ADA-USDT$0.9988
0.0004264 Eth
$124,630,096.00
188,157,743.500 ADA
1.5802%
77
BTSE
BTC-USDT$0.9988
0.0004262 Eth
$121,113,762.00
1,428.164 BTC
0.0000%
78
Gate.io
LTC-USDT$0.9984
0.0004264 Eth
$119,626,891.00
962,480.136 LTC
0.0081%
79
OKX
LTC-USDT$0.9988
0.0004269 Eth
$117,404,310.00
945,836.424 LTC
0.0079%
80
OKX
XRP-USDT$0.9988
0.0004269 Eth
$113,913,117.00
50,980,920.729 XRP
0.4282%
81
Gate.io
DOGE-USDT$0.9984
0.0004264 Eth
$104,882,129.00
513,048,528.440 DOGE
4.3088%
82
DigiFinex
TRX-USDT$0.9982
0.0004265 Eth
$101,358,692.00
446,406,779.700 TRX
3.7491%
83
KuCoin
SOL-USDT$0.9988
0.0004269 Eth
$100,824,397.00
737,583.846 SOL
0.0062%
84
KuCoin
XRP-USDT$0.9988
0.0004269 Eth
$100,341,641.00
45,983,600.566 XRP
0.3862%
85
Binance
HBAR-USDT$0.9994
0.0004265 Eth
$93,329,635.00
477,875,891.000 HBAR
4.0134%
86
Bybit
OM-USDT$0.9989
0.0004268 Eth
$92,287,967.00
12,364,808.000 OM
0.1038%
87
FameEX
USDC-USDT$0.9989
0.0004262 Eth
$89,018,487.00
89,032,188.590 USDC
0.7477%
88
MEXC
DOGE-USDT$0.9988
0.0004264 Eth
$87,720,874.00
427,854,402.270 DOGE
3.5933%
89
MEXC
FDUSD-USDT$0.9993
0.0004275 Eth
$84,840,501.00
84,947,931.280 FDUSD
0.7134%
90
Bitrue
ETH-USDT$0.9988
0.0004264 Eth
$79,424,784.00
33,961.200 ETH
0.0003%
91
OKX
TRUMP-USDT$0.9988
0.0004269 Eth
$78,620,986.00
6,056,161.112 TRUMP
0.0509%
92
OKX
SUI-USDT$0.9988
0.0004269 Eth
$77,492,885.00
26,562,098.694 SUI
0.2231%
93
Coinbase Exchange
BTC-USDT$0.9989
0.0004269 Eth
$69,859,111.00
824.884 BTC
0.0000%
94
Gate.io
ONDO-USDT$0.9987
0.0004263 Eth
$65,059,548.00
67,245,821.020 ONDO
0.5648%
95
Bybit
SUI-USDT$0.9989
0.0004268 Eth
$61,075,246.00
20,889,961.720 SUI
0.1754%
96
LBank
XRP-USDT$0.9988
0.0004263 Eth
$59,663,306.00
27,247,521.600 XRP
0.2288%
97
Bitget
DOGE-USDT$0.9989
0.0004268 Eth
$58,467,667.00
284,189,770.027 DOGE
2.3867%
98
Binance
UNI-USDT$0.9984
0.0004262 Eth
$55,723,912.00
6,942,109.510 UNI
0.0583%
99
BingX
BTC-USDT$0.9989
0.0004268 Eth
$49,476,192.00
572.713 BTC
0.0000%
100
Arkham
BTC-USDT$0.9987
0.0004261 Eth
$46,007,776.00
535.888 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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