Overview
Max Total Supply
54,940,840,345.993792 USDT
Holders
6,281,553 ( 0.053%)
Market
Price
$1.00 @ 0.000396 ETH (+0.07%)
Onchain Market Cap
$54,912,710,635.74
Circulating Supply Market Cap
$120,515,365,969.00
Other Info
Token Contract (WITH 6 Decimals)
Balance
677.935521 USDTValue
$677.59 ( ~0.268626864952583 Eth) [0.0000%]Loading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | BTC-USDT | $0.9996 0.0003962 Eth | $2,757,992,210.00 39,367.438 BTC | 0.0000% |
2 | WEEX | BTC-USDT | $0.9997 0.0003954 Eth | $2,341,204,637.00 33,385.027 BTC | 0.0000% |
3 | Hotcoin | BTC-USDT | $0.9997 0.0003962 Eth | $2,267,714,840.00 32,406.146 BTC | 0.0000% |
4 | CoinW | BTC-USDT | $0.9997 0.0003952 Eth | $2,079,875,428.00 29,670.000 BTC | 0.0000% |
5 | BVOX | BTC-USDT | $0.9997 0.0003962 Eth | $1,578,806,632.00 22,553.208 BTC | 0.0000% |
6 | Ourbit | BTC-USDT | $0.9997 0.0003954 Eth | $1,519,313,122.00 21,683.984 BTC | 0.0000% |
7 | Bybit | BTC-USDT | $0.9997 0.0003962 Eth | $1,369,500,015.00 19,546.500 BTC | 0.0000% |
8 | Binance | ETH-USDT | $0.9997 0.0003962 Eth | $1,217,075,036.00 482,674.588 ETH | 0.0000% |
9 | DigiFinex | BTC-USDT | $0.9997 0.0003962 Eth | $998,790,178.00 14,264.107 BTC | 0.0000% |
10 | WhiteBIT | BTC-USDT | $0.9997 0.0003962 Eth | $945,189,002.00 13,491.363 BTC | 0.0000% |
11 | OKX | BTC-USDT | $0.9997 0.0003962 Eth | $846,487,323.00 12,075.365 BTC | 0.0000% |
12 | Toobit | ETH-USDT | $0.9994 0.0003956 Eth | $811,292,470.00 321,838.206 ETH | 0.0000% |
13 | BitMart | BTC-USDT | $0.9993 0.0003961 Eth | $745,372,651.00 10,637.337 BTC | 0.0000% |
14 | Bitunix | BTC-USDT | $0.9997 0.0003952 Eth | $583,778,030.00 8,328.180 BTC | 0.0000% |
15 | XT.COM | BTC-USDT | $0.9997 0.0003958 Eth | $572,357,043.00 8,168.102 BTC | 0.0000% |
16 | BVOX | ETH-USDT | $0.9994 0.0003956 Eth | $473,763,013.00 188,130.419 ETH | 0.0000% |
17 | AscendEX (BitMax) | BTC-USDT | $0.9997 0.0003963 Eth | $467,446,106.00 6,674.632 BTC | 0.0000% |
18 | BitMart | ETH-USDT | $0.9993 0.0003961 Eth | $466,132,088.00 184,605.049 ETH | 0.0000% |
19 | Bybit | ETH-USDT | $0.9997 0.0003962 Eth | $465,385,572.00 184,574.768 ETH | 0.0000% |
20 | Pionex | ETH-USDT | $0.9993 0.0003961 Eth | $419,149,013.00 166,293.824 ETH | 0.0000% |
21 | DigiFinex | ETH-USDT | $0.9997 0.0003962 Eth | $418,184,539.00 165,800.530 ETH | 0.0000% |
22 | HTX | BTC-USDT | $0.9997 0.0003962 Eth | $416,541,495.00 5,943.922 BTC | 0.0000% |
23 | Binance | DOGE-USDT | $0.9997 0.0003962 Eth | $411,624,306.00 2,552,311,845.000 DOGE | 0.0182% |
24 | P2B | ETH-USDT | $0.9997 0.0003958 Eth | $405,899,346.00 160,949.076 ETH | 0.0000% |
25 | OKX | ETH-USDT | $0.9997 0.0003963 Eth | $374,475,544.00 148,391.683 ETH | 0.0000% |
26 | WhiteBIT | ETH-USDT | $0.9997 0.0003958 Eth | $372,036,824.00 147,549.073 ETH | 0.0000% |
27 | CoinW | ETH-USDT | $0.9999 0.0003961 Eth | $357,057,045.00 141,539.775 ETH | 0.0000% |
28 | Coinbase Exchange | USDT-USD | $0.9997 0.0003962 Eth | $342,001,588.00 342,121,330.490 USDT | 0.0024% |
29 | Gate.io | ETH-USDT | $0.9997 0.0003963 Eth | $339,890,702.00 134,872.546 ETH | 0.0000% |
30 | XT.COM | ETH-USDT | $0.9997 0.0003958 Eth | $338,569,837.00 134,260.293 ETH | 0.0000% |
31 | LATOKEN | BTC-USDT | $0.9993 0.0003961 Eth | $296,027,594.00 4,227.613 BTC | 0.0000% |
32 | Gate.io | BTC-USDT | $0.9997 0.0003963 Eth | $281,939,311.00 4,023.256 BTC | 0.0000% |
33 | Bitget | BTC-USDT | $0.9997 0.0003962 Eth | $272,432,356.00 3,890.956 BTC | 0.0000% |
34 | AscendEX (BitMax) | ETH-USDT | $0.9997 0.0003963 Eth | $258,743,455.00 102,546.251 ETH | 0.0000% |
35 | Biconomy.com | BTC-USDT | $0.9997 0.0003963 Eth | $256,444,032.00 3,660.324 BTC | 0.0000% |
36 | Bitunix | ETH-USDT | $0.9997 0.0003952 Eth | $232,193,412.00 91,911.741 ETH | 0.0000% |
37 | BTSE | BTC-USDT | $0.9997 0.0003958 Eth | $219,693,548.00 3,138.428 BTC | 0.0000% |
38 | Bybit | USDC-USDT | $0.9997 0.0003962 Eth | $215,771,898.00 215,647,658.190 USDC | 0.0015% |
39 | Ourbit | ETH-USDT | $0.9997 0.0003958 Eth | $210,320,277.00 83,420.785 ETH | 0.0000% |
40 | Fastex | BTC-USDT | $0.9995 0.0003953 Eth | $202,017,215.00 2,883.503 BTC | 0.0000% |
41 | Binance | SUI-USDT | $0.9997 0.0003965 Eth | $187,632,293.00 94,363,034.400 SUI | 0.0007% |
42 | LBank | ETH-USDT | $0.9997 0.0003962 Eth | $185,549,537.00 73,561.419 ETH | 0.0000% |
43 | OKX | DOGE-USDT | $0.9997 0.0003963 Eth | $176,188,366.00 1,093,307,232.304 DOGE | 0.0078% |
44 | WhiteBIT | SOL-USDT | $0.9995 0.0003953 Eth | $174,900,096.00 1,047,149.246 SOL | 0.0000% |
45 | Coinstore | BTC-USDT | $0.9997 0.0003962 Eth | $165,925,321.00 2,367.791 BTC | 0.0000% |
46 | LATOKEN | ETH-USDT | $0.9993 0.0003961 Eth | $165,749,819.00 65,716.483 ETH | 0.0000% |
47 | Binance | NEIRO-USDT | $0.9996 0.0003955 Eth | $164,087,454.00 106,535,186,633.000 NEIRO | 0.7597% |
48 | Bitget | ETH-USDT | $0.9997 0.0003962 Eth | $157,457,439.00 62,489.907 ETH | 0.0000% |
49 | Coinstore | ETH-USDT | $0.9997 0.0003963 Eth | $153,271,611.00 60,801.080 ETH | 0.0000% |
50 | Biconomy.com | ETH-USDT | $0.9997 0.0003963 Eth | $151,883,348.00 60,241.923 ETH | 0.0000% |
51 | Binance | BNB-USDT | $0.9997 0.0003962 Eth | $148,446,680.00 257,426.810 BNB | 0.0000% |
52 | Binance | XRP-USDT | $0.9998 0.0003973 Eth | $145,315,030.00 282,181,721.000 XRP | 0.0020% |
53 | Bybit | SOL-USDT | $0.9997 0.0003962 Eth | $141,834,480.00 843,381.062 SOL | 0.0000% |
54 | Kraken | USDT-USD | $0.9996 0.0003963 Eth | $138,122,077.00 138,171,818.473 USDT | 0.0010% |
55 | OKX | SOL-USDT | $0.9997 0.0003963 Eth | $135,932,016.00 809,128.049 SOL | 0.0000% |
56 | Binance | WIF-USDT | $0.9997 0.0003962 Eth | $129,363,798.00 55,187,391.910 WIF | 0.0004% |
57 | Bitget | DOGE-USDT | $0.9997 0.0003962 Eth | $107,593,741.00 667,202,998.633 DOGE | 0.0048% |
58 | Gate.io | DOGE-USDT | $0.9997 0.0003963 Eth | $103,117,893.00 639,322,661.626 DOGE | 0.0046% |
59 | HTX | ETH-USDT | $0.9997 0.0003962 Eth | $80,839,768.00 32,001.868 ETH | 0.0000% |
60 | Deepcoin | UXLINK-USDT | $0.9997 0.0003963 Eth | $76,573,732.00 154,120,023.216 UXLINK | 0.0011% |
61 | Bitget | SOL-USDT | $0.9997 0.0003962 Eth | $76,160,000.00 453,674.917 SOL | 0.0000% |
62 | Bybit | DOGE-USDT | $0.9997 0.0003962 Eth | $75,689,905.00 469,272,741.600 DOGE | 0.0033% |
63 | Bybit | MNT-USDT | $0.9997 0.0003962 Eth | $75,335,998.00 128,316,962.550 MNT | 0.0009% |
64 | Binance | ENA-USDT | $0.9997 0.0003962 Eth | $74,449,324.00 200,736,890.030 ENA | 0.0014% |
65 | Bybit | XRP-USDT | $0.9997 0.0003962 Eth | $73,985,470.00 143,862,879.430 XRP | 0.0010% |
66 | LBank | USDC-USDT | $0.9997 0.0003962 Eth | $72,955,176.00 72,956,291.990 USDC | 0.0005% |
67 | Coinbase Exchange | BTC-USDT | $0.9997 0.0003962 Eth | $71,905,159.00 1,026.725 BTC | 0.0000% |
68 | Bitget | BGB-USDT | $0.9997 0.0003962 Eth | $71,148,843.00 62,900,658.618 BGB | 0.0004% |
69 | BingX | BTC-USDT | $0.9997 0.0003962 Eth | $63,971,297.00 913.306 BTC | 0.0000% |
70 | Binance | TIA-USDT | $0.9997 0.0003962 Eth | $63,395,061.00 13,253,872.990 TIA | 0.0001% |
71 | BYDFi | BTC-USDT | $0.9994 0.0003956 Eth | $62,835,467.00 897.610 BTC | 0.0000% |
72 | Gate.io | SUI-USDT | $0.9997 0.0003963 Eth | $61,719,169.00 30,992,805.930 SUI | 0.0002% |
73 | Gate.io | KAS-USDT | $0.9998 0.0003963 Eth | $57,991,754.00 497,223,469.500 KAS | 0.0035% |
74 | WhiteBIT | SUI-USDT | $0.9997 0.0003958 Eth | $57,965,316.00 28,822,498.817 SUI | 0.0002% |
75 | DigiFinex | DOGE-USDT | $0.9997 0.0003962 Eth | $56,929,336.00 351,309,599.490 DOGE | 0.0025% |
76 | OKX | SUI-USDT | $0.9997 0.0003962 Eth | $55,887,676.00 28,094,376.511 SUI | 0.0002% |
77 | Bitunix | SOL-USDT | $0.9997 0.0003952 Eth | $54,097,093.00 323,191.640 SOL | 0.0000% |
78 | Bitunix | DOGE-USDT | $0.9997 0.0003952 Eth | $48,687,880.00 300,161,940.000 DOGE | 0.0021% |
79 | Binance | RUNE-USDT | $0.9997 0.0003962 Eth | $48,615,044.00 8,625,380.600 RUNE | 0.0001% |
80 | PointPay | BTC-USDT | $0.9998 0.0003963 Eth | $48,365,895.00 690.323 BTC | 0.0000% |
81 | Binance | TAO-USDT | $0.9998 0.0003975 Eth | $48,361,722.00 102,940.047 TAO | 0.0000% |
82 | HTX | PEPE-USDT | $0.9997 0.0003962 Eth | $48,302,359.00 5,319,765,225,633.200 PEPE | 37.9364% |
83 | DigiFinex | SOL-USDT | $0.9997 0.0003962 Eth | $47,581,721.00 284,839.590 SOL | 0.0000% |
84 | Bybit | APEX-USDT | $0.9997 0.0003962 Eth | $46,459,851.00 33,415,856.070 APEX | 0.0002% |
85 | Deepcoin | USDC-USDT | $0.9993 0.0003961 Eth | $46,049,876.00 49,397,730.498 USDC | 0.0004% |
86 | MEXC | SUI-USDT | $0.9999 0.0003961 Eth | $45,282,799.00 22,536,078.490 SUI | 0.0002% |
87 | Bitget | PEPE-USDT | $0.9997 0.0003962 Eth | $42,432,644.00 4,678,682,047,981.000 PEPE | 33.3647% |
88 | Azbit | BNB-USDT | $0.9996 0.0003974 Eth | $41,133,104.00 71,317.866 BNB | 0.0000% |
89 | Gate.io | SOL-USDT | $0.9997 0.0003963 Eth | $39,498,692.00 234,927.949 SOL | 0.0000% |
90 | BingX | ETH-USDT | $0.9997 0.0003962 Eth | $36,959,792.00 14,656.737 ETH | 0.0000% |
91 | Bitunix | USDC-USDT | $0.9997 0.0003952 Eth | $36,790,740.00 36,789,825.033 USDC | 0.0003% |
92 | Bybit | PEPE-USDT | $0.9997 0.0003962 Eth | $35,456,432.00 3,908,463,366,372.000 PEPE | 27.8721% |
93 | Binance | UNI-USDT | $0.9997 0.0003962 Eth | $34,924,190.00 4,484,687.620 UNI | 0.0000% |
94 | MEXC | SOL-USDT | $0.9999 0.0003961 Eth | $34,830,575.00 208,455.280 SOL | 0.0000% |
95 | WEEX | DOGE-USDT | $0.9997 0.0003963 Eth | $34,638,801.00 214,438,463.910 DOGE | 0.0015% |
96 | WhiteBIT | TRX-USDT | $0.9997 0.0003958 Eth | $34,172,852.00 204,625,042.860 TRX | 0.0015% |
97 | WhiteBIT | INJ-USDT | $0.9997 0.0003962 Eth | $30,494,842.00 1,604,432.959 INJ | 0.0000% |
98 | Azbit | TRX-USDT | $0.9994 0.0003956 Eth | $30,027,627.00 179,072,996.850 TRX | 0.0013% |
99 | WhiteBIT | ADA-USDT | $0.9997 0.0003962 Eth | $29,778,923.00 83,873,933.950 ADA | 0.0006% |
100 | Azbit | BTC-USDT | $0.9997 0.0003962 Eth | $18,347,425.00 261.969 BTC | 0.0000% |
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
- Callisto Network - July 10th, 2019 - Security Audit Report
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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"}]
Contract Creation Code
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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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