ETH Price: $3,518.93 (+2.86%)
Gas: 5 Gwei

Token

Tether USD (USDT)
 

Overview

Max Total Supply

51,995,716,056.975351 USDT

Holders

5,780,822 ( 0.095%)

Market

Price

$1.00 @ 0.000284 ETH (+0.09%)

Onchain Market Cap

$52,047,711,773.03

Circulating Supply Market Cap

$113,735,679,014.00

Other Info

Token Contract (WITH 6 Decimals)

Filtered by Token Holder
paybank.eth
Balance
0 USDT

Value
$0.00
0x449d028a14Aabbb2764a8d8184FF9F8f06cefD7c
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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):$58,390,983,479.00
Market Capitalization:$113,735,679,014.00
Circulating Supply:113,696,229,621.00 USDT
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
Binance
BTC-USDT$1.001
0.0002844 Eth
$2,325,284,239.00
35,578.073 BTC
0.0000%
2
Bybit
BTC-USDT$1.00
0.0002845 Eth
$1,255,501,488.00
19,251.145 BTC
0.0000%
3
Binance
USDC-USDT$1.001
0.0002843 Eth
$1,202,214,203.00
1,201,399,749.000 USDC
0.0237%
4
Binance
ETH-USDT$1.001
0.0002843 Eth
$1,029,105,993.00
297,969.635 ETH
0.0000%
5
P2B
BTC-USDT$1.00
0.0002845 Eth
$890,505,133.00
13,286.632 BTC
0.0000%
6
Tapbit
BTC-USDT$1.00
0.0002845 Eth
$856,560,940.00
13,112.133 BTC
0.0000%
7
Pionex
BTC-USDT$1.00
0.0002845 Eth
$833,135,726.00
12,743.158 BTC
0.0000%
8
Binance
SOL-USDT$1.001
0.0002843 Eth
$777,356,981.00
4,707,425.800 SOL
0.0001%
9
LBank
BTC-USDT$1.001
0.0002841 Eth
$730,324,468.00
10,893.260 BTC
0.0000%
10
CoinW
BTC-USDT$1.001
0.0002841 Eth
$680,638,437.00
10,142.246 BTC
0.0000%
11
OKX
BTC-USDT$1.001
0.0002844 Eth
$660,464,889.00
10,117.193 BTC
0.0000%
12
Crypto.com Exchange
ETH-USDT$1.001
0.0002844 Eth
$639,570,132.00
181,681.061 ETH
0.0000%
13
Crypto.com Exchange
BTC-USDT$1.00
0.0002845 Eth
$628,673,494.00
9,379.448 BTC
0.0000%
14
DigiFinex
BTC-USDT$1.00
0.0002845 Eth
$599,402,269.00
8,943.276 BTC
0.0000%
15
FameEX
BTC-USDT$1.001
0.0002845 Eth
$599,196,810.00
9,181.987 BTC
0.0000%
16
MEXC
BTC-USDT$1.001
0.0002844 Eth
$582,376,366.00
8,686.214 BTC
0.0000%
17
LBank
ETH-USDT$1.001
0.0002845 Eth
$577,385,472.00
164,072.493 ETH
0.0000%
18
Bybit
ETH-USDT$1.00
0.0002845 Eth
$552,624,380.00
160,196.521 ETH
0.0000%
19
Gate.io
BTC-USDT$1.001
0.0002845 Eth
$552,065,797.00
8,393.638 BTC
0.0000%
20
Toobit
ETH-USDT$1.001
0.0002841 Eth
$510,907,967.00
148,022.104 ETH
0.0000%
21
Gate.io
ETH-USDT$1.001
0.0002845 Eth
$489,454,240.00
141,312.633 ETH
0.0000%
22
BitMart
ETH-USDT$0.9997
0.0002841 Eth
$429,410,792.00
122,004.075 ETH
0.0000%
23
LATOKEN
BTC-USDT$1.001
0.0002841 Eth
$395,206,965.00
5,889.986 BTC
0.0000%
24
Fastex
BTC-USDT$0.9997
0.0002841 Eth
$313,032,110.00
4,675.976 BTC
0.0000%
25
Biconomy
ETH-USDT$1.001
0.0002844 Eth
$312,071,820.00
90,499.420 ETH
0.0000%
26
Binance
XRP-USDT$1.00
0.0002842 Eth
$300,578,725.00
537,225,558.000 XRP
0.0106%
27
Binance
FDUSD-USDT$1.00
0.0002842 Eth
$299,551,864.00
299,555,756.000 FDUSD
0.0059%
28
AscendEX (BitMax)
BTC-USDT$1.001
0.0002845 Eth
$286,309,852.00
4,270.881 BTC
0.0000%
29
BigONE
BTC-USDT$1.001
0.0002844 Eth
$282,216,448.00
4,210.215 BTC
0.0000%
30
Deepcoin
ETH-USDT$0.9997
0.0002841 Eth
$281,775,091.00
80,609.950 ETH
0.0000%
31
OKX
ETH-USDT$1.001
0.0002845 Eth
$280,142,401.00
81,191.607 ETH
0.0000%
32
HTX
BTC-USDT$1.00
0.0002845 Eth
$267,773,861.00
4,106.875 BTC
0.0000%
33
Coinbase Exchange
USDT-USD$1.001
0.0002845 Eth
$265,996,732.00
265,861,142.880 USDT
0.0052%
34
Binance
WIF-USDT$1.001
0.0002843 Eth
$255,657,374.00
103,914,692.410 WIF
0.0021%
35
Pionex
ETH-USDT$1.00
0.0002845 Eth
$255,560,976.00
74,000.100 ETH
0.0000%
36
Hotcoin
ETH-USDT$1.001
0.0002841 Eth
$254,134,765.00
72,206.712 ETH
0.0000%
37
Bitget
BTC-USDT$1.00
0.0002845 Eth
$240,974,450.00
3,712.409 BTC
0.0000%
38
Bybit
SOL-USDT$1.00
0.0002845 Eth
$239,958,377.00
1,455,902.853 SOL
0.0000%
39
KuCoin
ETH-USDT$1.001
0.0002845 Eth
$202,018,150.00
57,412.767 ETH
0.0000%
40
OKX
SOL-USDT$1.001
0.0002845 Eth
$201,885,023.00
1,223,643.495 SOL
0.0000%
41
Tapbit
ETH-USDT$1.00
0.0002845 Eth
$200,520,582.00
58,092.725 ETH
0.0000%
42
Binance
BNB-USDT$1.001
0.0002843 Eth
$191,623,318.00
327,669.084 BNB
0.0000%
43
KuCoin
BTC-USDT$1.001
0.0002845 Eth
$184,635,289.00
2,754.782 BTC
0.0000%
44
MEXC
ETH-USDT$1.001
0.0002844 Eth
$167,295,418.00
47,518.727 ETH
0.0000%
45
AscendEX (BitMax)
ETH-USDT$1.001
0.0002845 Eth
$154,468,230.00
43,899.765 ETH
0.0000%
46
Bitget
ETH-USDT$1.00
0.0002845 Eth
$128,657,283.00
37,309.873 ETH
0.0000%
47
CITEX
ETH-USDT$1.00
0.0002845 Eth
$123,858,672.00
35,864.216 ETH
0.0000%
48
WhiteBIT
SOL-USDT$1.001
0.0002841 Eth
$112,994,752.00
668,166.865 SOL
0.0000%
49
Kraken
USDT-USD$1.001
0.0002845 Eth
$110,537,744.00
110,480,294.403 USDT
0.0022%
50
CITEX
BNB-USDT$1.00
0.0002845 Eth
$95,856,583.00
163,923.076 BNB
0.0000%
51
Bitget
SOL-USDT$1.00
0.0002845 Eth
$84,810,823.00
515,418.417 SOL
0.0000%
52
Bitfinex
BTC-USDT$1.001
0.0002844 Eth
$72,192,951.00
1,077.088 BTC
0.0000%
53
Dex-Trade
BTC-USDT$1.001
0.0002845 Eth
$66,698,552.00
995.032 BTC
0.0000%
54
DigiFinex
SOL-USDT$1.00
0.0002845 Eth
$66,264,832.00
391,939.150 SOL
0.0000%
55
Pionex
SOL-USDT$1.00
0.0002845 Eth
$64,825,414.00
392,655.230 SOL
0.0000%
56
Gate.io
SOL-USDT$1.001
0.0002845 Eth
$63,427,755.00
382,494.750 SOL
0.0000%
57
Gate.io
PEPE-USDT$1.00
0.0002845 Eth
$59,985,387.00
4,939,378,752,101.800 PEPE
97.5346%
58
WhiteBIT
DOGE-USDT$1.001
0.0002844 Eth
$56,645,927.00
452,350,741.000 DOGE
0.0089%
59
HTX
ETH-USDT$1.00
0.0002845 Eth
$55,204,036.00
15,997.715 ETH
0.0000%
60
P2B
BNB-USDT$1.00
0.0002845 Eth
$52,255,209.00
87,915.783 BNB
0.0000%
61
WhiteBIT
XRP-USDT$1.001
0.0002841 Eth
$50,336,151.00
87,327,289.600 XRP
0.0017%
62
BloFin
BTC-USDT$0.9997
0.0002841 Eth
$31,535,302.00
483.279 BTC
0.0000%
63
Gate.io
XRP-USDT$1.001
0.0002845 Eth
$31,021,144.00
55,195,082.219 XRP
0.0011%
64
FMFW.io
BTC-USDT$1.001
0.0002841 Eth
$28,038,054.00
418.316 BTC
0.0000%
65
Dcoin
BTC-USDT$1.00
0.0002845 Eth
$26,819,129.00
400.000 BTC
0.0000%
66
LATOKEN
USDC-USDT$1.001
0.0002841 Eth
$26,503,801.00
26,501,278.444 USDC
0.0005%
67
WhiteBIT
TRX-USDT$1.001
0.0002844 Eth
$25,477,675.00
189,309,157.600 TRX
0.0037%
68
Kraken
BTC-USDT$1.00
0.0002845 Eth
$23,218,085.00
346.498 BTC
0.0000%
69
BloFin
ETH-USDT$0.9997
0.0002841 Eth
$20,189,536.00
5,854.185 ETH
0.0000%
70
Slex
BTC-USDT$0.9997
0.0002841 Eth
$19,082,855.00
292.318 BTC
0.0000%
71
BitVenus
BNB-USDT$0.9997
0.0002841 Eth
$18,751,750.00
32,345.387 BNB
0.0000%
72
MEXC
USDC-USDT$1.001
0.0002844 Eth
$15,199,988.00
15,199,640.760 USDC
0.0003%
73
FMFW.io
ETH-USDT$1.001
0.0002841 Eth
$14,728,225.00
4,182.658 ETH
0.0000%
74
DigiFinex
BNB-USDT$1.00
0.0002845 Eth
$14,125,221.00
23,772.716 BNB
0.0000%
75
LBank
DOGE-USDT$1.001
0.0002845 Eth
$13,909,501.00
110,988,337.000 DOGE
0.0022%
76
Tapbit
XRP-USDT$1.00
0.0002845 Eth
$12,853,858.00
22,960,202.430 XRP
0.0005%
77
Biconomy
SOL-USDT$1.001
0.0002844 Eth
$11,238,735.00
68,271.071 SOL
0.0000%
78
OKX
STETH-USDT$1.001
0.0002845 Eth
$10,279,658.00
2,973.635 STETH
0.0000%
79
Gate.io
BNB-USDT$1.001
0.0002845 Eth
$9,307,580.00
15,909.638 BNB
0.0000%
80
XT.COM
DOGE-USDT$1.001
0.0002841 Eth
$8,667,927.00
71,025,488.000 DOGE
0.0014%
81
FMFW.io
USDT-USDC$1.00
0.0002841 Eth
$7,508,626.00
7,504,912.000 USDT
0.0001%
82
Kraken
USDC-USDT$1.001
0.0002844 Eth
$6,610,381.00
6,610,229.833 USDC
0.0001%
83
Bit2Me
USDC-USDT$1.001
0.0002845 Eth
$6,480,880.00
6,478,025.236 USDC
0.0001%
84
WOO X
ETH-USDT$1.001
0.0002844 Eth
$6,068,179.00
1,723.444 ETH
0.0000%
85
Gate.io
LTC-USDT$1.001
0.0002845 Eth
$5,951,509.00
83,500.080 LTC
0.0000%
86
WEEX
BNB-USDT$0.9971
0.0002843 Eth
$5,853,917.00
10,103.447 BNB
0.0000%
87
BingX
FDUSD-USDT$1.00
0.0002845 Eth
$5,534,944.00
5,533,270.517 FDUSD
0.0001%
88
DigiFinex
SUI-USDT$1.00
0.0002845 Eth
$4,896,126.00
5,705,766.800 SUI
0.0001%
89
WOO X
SOL-USDT$1.001
0.0002844 Eth
$4,814,345.00
28,470.670 SOL
0.0000%
90
Toobit
SOL-USDT$1.001
0.0002841 Eth
$4,543,407.00
27,567.710 SOL
0.0000%
91
OrangeX
BONK-USDT$0.9997
0.0002841 Eth
$3,521,388.00
121,250,392,693.313 BONK
2.3943%
92
LBank
DAI-USDT$1.001
0.0002841 Eth
$2,775,996.00
2,775,226.650 DAI
0.0001%
93
Fastex
FTN-USDT$0.9997
0.0002841 Eth
$2,693,841.00
1,164,202.570 FTN
0.0000%
94
BingX
BNB-USDT$1.00
0.0002845 Eth
$2,372,511.00
4,062.801 BNB
0.0000%
95
Gate.io
USDC-USDT$1.00
0.0002845 Eth
$2,360,417.00
2,359,446.497 USDC
0.0000%
96
Tapbit
BNB-USDT$1.00
0.0002845 Eth
$1,217,022.00
2,087.656 BNB
0.0000%
97
BitVenus
FDUSD-USDT$1.001
0.0002844 Eth
$932,120.00
931,813.000 FDUSD
0.0000%
98
BitVenus
TUSD-USDT$1.001
0.0002844 Eth
$872,552.00
871,853.000 TUSD
0.0000%
99
HashKey Exchange
BTC-USDT$1.001
0.0002841 Eth
$616,309.00
9.466 BTC
0.0000%
100
Hotcoin
UNI-USDT$1.001
0.0002841 Eth
$299,324.00
37,529.300 UNI
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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