Overview
Max Total Supply
76,926,220,145.483487 USDT
Holders
6,538,377 ( -0.115%)
Market
Price
$1.00 @ 0.000294 ETH (-0.02%)
Onchain Market Cap
$76,801,522,742.63
Circulating Supply Market Cap
$138,807,977,384.00
Other Info
Token Contract (WITH 6 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Bybit | BTC-USDT | $0.9982 0.0002937 Eth | $1,248,527,729.00 13,203.611 BTC | 0.0000% |
2 | OrangeX | BTC-USDT | $0.9982 0.0002936 Eth | $962,104,689.00 10,172.177 BTC | 0.0000% |
3 | AscendEX (BitMax) | BTC-USDT | $0.9982 0.0002941 Eth | $946,033,381.00 9,944.621 BTC | 0.0000% |
4 | Binance | BTC-USDT | $0.9983 0.0002938 Eth | $796,964,983.00 8,425.003 BTC | 0.0000% |
5 | OrangeX | ETH-USDT | $0.9982 0.0002936 Eth | $667,292,044.00 198,605.075 ETH | 0.0000% |
6 | BVOX | BTC-USDT | $0.9982 0.0002937 Eth | $662,522,397.00 7,005.448 BTC | 0.0000% |
7 | FameEX | BTC-USDT | $0.9982 0.0002938 Eth | $655,835,289.00 6,933.736 BTC | 0.0000% |
8 | WhiteBIT | BTC-USDT | $0.9983 0.0002937 Eth | $653,381,692.00 6,862.908 BTC | 0.0000% |
9 | Binance | ETH-USDT | $0.9986 0.0002939 Eth | $597,412,206.00 177,671.113 ETH | 0.0000% |
10 | WEEX | BTC-USDT | $0.9979 0.0002935 Eth | $527,829,133.00 5,582.111 BTC | 0.0000% |
11 | Tapbit | ETH-USDT | $0.9982 0.0002937 Eth | $483,574,629.00 143,884.234 ETH | 0.0000% |
12 | Toobit | BTC-USDT | $0.9982 0.0002937 Eth | $475,958,166.00 5,031.352 BTC | 0.0000% |
13 | Binance | FDUSD-USDT | $0.9981 0.0002938 Eth | $468,635,419.00 468,895,934.000 FDUSD | 0.0032% |
14 | FameEX | ETH-USDT | $0.9982 0.0002938 Eth | $444,085,960.00 132,111.171 ETH | 0.0000% |
15 | Toobit | ETH-USDT | $0.998 0.0002937 Eth | $400,011,029.00 119,000.701 ETH | 0.0000% |
16 | WhiteBIT | ETH-USDT | $0.9983 0.0002937 Eth | $333,170,981.00 98,036.134 ETH | 0.0000% |
17 | Bybit | ETH-USDT | $0.9982 0.0002937 Eth | $332,570,674.00 98,898.997 ETH | 0.0000% |
18 | MEXC | ETH-USDT | $0.9981 0.0002934 Eth | $316,529,620.00 93,126.339 ETH | 0.0000% |
19 | BVOX | ETH-USDT | $0.9982 0.0002937 Eth | $285,825,805.00 85,071.746 ETH | 0.0000% |
20 | Binance | SOL-USDT | $0.9975 0.0002938 Eth | $285,017,515.00 1,506,834.028 SOL | 0.0000% |
21 | Ourbit | ETH-USDT | $0.9982 0.0002939 Eth | $276,295,599.00 82,233.854 ETH | 0.0000% |
22 | Bitget | ETH-USDT | $0.9982 0.0002937 Eth | $246,537,325.00 73,339.381 ETH | 0.0000% |
23 | Binance | BNB-USDT | $0.9977 0.0002941 Eth | $244,878,593.00 342,766.340 BNB | 0.0000% |
24 | OKX | BTC-USDT | $0.9983 0.0002938 Eth | $231,426,176.00 2,446.841 BTC | 0.0000% |
25 | Binance | XRP-USDT | $0.9986 0.0002939 Eth | $230,735,669.00 106,318,092.000 XRP | 0.0007% |
26 | Bitget | BTC-USDT | $0.9982 0.0002937 Eth | $227,539,106.00 2,406.323 BTC | 0.0000% |
27 | Hotcoin | BTC-USDT | $0.9982 0.0002937 Eth | $204,773,959.00 2,151.055 BTC | 0.0000% |
28 | BitMart | BTC-USDT | $0.9981 0.0002937 Eth | $202,285,829.00 2,125.568 BTC | 0.0000% |
29 | DigiFinex | BTC-USDT | $0.9983 0.0002938 Eth | $201,053,248.00 2,111.385 BTC | 0.0000% |
30 | Binance | DOGE-USDT | $0.9987 0.0002941 Eth | $200,451,418.00 630,418,968.000 DOGE | 0.0043% |
31 | Binance | GMT-USDT | $0.9981 0.0002937 Eth | $188,583,542.00 867,470,721.800 GMT | 0.0060% |
32 | BitMart | ETH-USDT | $0.9981 0.0002937 Eth | $184,661,436.00 54,364.526 ETH | 0.0000% |
33 | OKX | ETH-USDT | $0.9982 0.0002938 Eth | $183,255,633.00 54,536.619 ETH | 0.0000% |
34 | Binance | PEPE-USDT | $0.9983 0.0002942 Eth | $174,425,984.00 9,469,295,666,487.000 PEPE | 64.9785% |
35 | Binance | SUI-USDT | $0.9981 0.0002937 Eth | $159,339,806.00 38,998,555.000 SUI | 0.0003% |
36 | BTSE | BTC-USDT | $0.9982 0.0002939 Eth | $158,399,393.00 1,665.415 BTC | 0.0000% |
37 | HTX | BTC-USDT | $0.9982 0.0002938 Eth | $152,366,190.00 1,610.372 BTC | 0.0000% |
38 | Biconomy.com | BTC-USDT | $0.9982 0.0002938 Eth | $136,502,081.00 1,443.267 BTC | 0.0000% |
39 | LBank | SOL-USDT | $0.9982 0.0002937 Eth | $130,126,634.00 667,211.481 SOL | 0.0000% |
40 | Binance | HBAR-USDT | $0.9983 0.0002937 Eth | $120,387,090.00 425,235,035.000 HBAR | 0.0029% |
41 | Gate.io | BTC-USDT | $0.9983 0.0002938 Eth | $118,769,381.00 1,255.766 BTC | 0.0000% |
42 | Bybit | SOL-USDT | $0.9982 0.0002937 Eth | $110,237,760.00 580,239.370 SOL | 0.0000% |
43 | Bybit | VANA-USDT | $0.9982 0.0002937 Eth | $109,838,239.00 6,122,204.500 VANA | 0.0000% |
44 | Gate.io | ETH-USDT | $0.9983 0.0002938 Eth | $106,728,441.00 31,747.937 ETH | 0.0000% |
45 | LATOKEN | BTC-USDT | $0.9982 0.0002937 Eth | $102,712,417.00 1,078.770 BTC | 0.0000% |
46 | Binance | TRX-USDT | $0.9983 0.0002938 Eth | $101,525,018.00 392,124,099.700 TRX | 0.0027% |
47 | WhiteBIT | SOL-USDT | $0.9983 0.0002937 Eth | $100,935,591.00 517,700.267 SOL | 0.0000% |
48 | KuCoin | BTC-USDT | $0.9981 0.0002937 Eth | $98,536,325.00 1,035.095 BTC | 0.0000% |
49 | Tapbit | BTC-USDT | $0.9982 0.0002934 Eth | $97,661,256.00 1,032.576 BTC | 0.0000% |
50 | Binance | PENGU-USDT | $0.9981 0.0002937 Eth | $97,644,890.00 2,788,031,194.000 PENGU | 0.0191% |
51 | DigiFinex | ETH-USDT | $0.9983 0.0002938 Eth | $97,174,974.00 28,588.096 ETH | 0.0000% |
52 | XT.COM | ETH-USDT | $0.9984 0.0002940 Eth | $95,895,963.00 28,526.539 ETH | 0.0000% |
53 | KuCoin | ETH-USDT | $0.9981 0.0002937 Eth | $94,797,046.00 27,904.335 ETH | 0.0000% |
54 | WhiteBIT | PEPE-USDT | $0.9981 0.0002937 Eth | $94,339,436.00 5,033,683,278,896.000 PEPE | 34.5412% |
55 | BigONE | BTC-USDT | $0.9981 0.0002938 Eth | $93,050,988.00 977.615 BTC | 0.0000% |
56 | Bitunix | ETH-USDT | $0.9985 0.0002938 Eth | $91,365,468.00 26,882.696 ETH | 0.0000% |
57 | OKX | DOGE-USDT | $0.9982 0.0002938 Eth | $91,225,965.00 286,955,233.164 DOGE | 0.0020% |
58 | Biconomy.com | ETH-USDT | $0.9982 0.0002938 Eth | $90,793,186.00 27,013.298 ETH | 0.0000% |
59 | Bybit | XRP-USDT | $0.9982 0.0002937 Eth | $88,386,312.00 40,759,030.920 XRP | 0.0003% |
60 | Fastex | BTC-USDT | $0.9985 0.0002938 Eth | $87,533,663.00 919.283 BTC | 0.0000% |
61 | LATOKEN | ETH-USDT | $0.9982 0.0002937 Eth | $84,519,032.00 24,871.864 ETH | 0.0000% |
62 | BTSE | ETH-USDT | $0.998 0.0002941 Eth | $83,638,564.00 24,649.136 ETH | 0.0000% |
63 | WhiteBIT | XRP-USDT | $0.9982 0.0002938 Eth | $81,236,500.00 37,262,338.670 XRP | 0.0003% |
64 | LBank | DOGE-USDT | $0.9982 0.0002938 Eth | $77,397,166.00 238,947,908.000 DOGE | 0.0016% |
65 | Binance | AAVE-USDT | $0.9983 0.0002937 Eth | $75,912,747.00 225,697.056 AAVE | 0.0000% |
66 | WhiteBIT | DOGE-USDT | $0.9982 0.0002938 Eth | $72,908,218.00 225,088,991.900 DOGE | 0.0015% |
67 | HTX | DOGE-USDT | $0.9982 0.0002938 Eth | $72,589,393.00 228,980,521.445 DOGE | 0.0016% |
68 | Binance | CRV-USDT | $0.9981 0.0002937 Eth | $68,969,702.00 71,529,672.600 CRV | 0.0005% |
69 | Binance | MOVE-USDT | $0.9981 0.0002941 Eth | $67,881,277.00 65,946,084.800 MOVE | 0.0005% |
70 | OKX | SOL-USDT | $0.9982 0.0002938 Eth | $67,378,709.00 356,754.432 SOL | 0.0000% |
71 | WEEX | XRP-USDT | $0.9975 0.0002937 Eth | $65,953,835.00 30,473,815.543 XRP | 0.0002% |
72 | Binance | ENA-USDT | $0.9981 0.0002937 Eth | $64,453,039.00 70,801,159.560 ENA | 0.0005% |
73 | Bybit | MNT-USDT | $0.9982 0.0002937 Eth | $62,644,870.00 52,164,075.510 MNT | 0.0004% |
74 | MEXC | SOL-USDT | $0.9986 0.0002939 Eth | $62,464,320.00 320,323.610 SOL | 0.0000% |
75 | MEXC | DOGE-USDT | $0.9981 0.0002940 Eth | $61,286,083.00 189,313,840.700 DOGE | 0.0013% |
76 | Binance | XVG-USDT | $0.9985 0.0002940 Eth | $60,359,042.00 4,194,217,054.000 XVG | 0.0288% |
77 | Binance | FTM-USDT | $0.998 0.0002936 Eth | $60,044,925.00 74,426,068.000 FTM | 0.0005% |
78 | Bitget | VIRTUAL-USDT | $0.9982 0.0002937 Eth | $59,501,354.00 17,430,815.570 VIRTUAL | 0.0001% |
79 | CoinW | XRP-USDT | $0.9982 0.0002937 Eth | $58,621,234.00 26,912,772.700 XRP | 0.0002% |
80 | BigONE | ETH-USDT | $0.9983 0.0002942 Eth | $57,920,555.00 17,066.300 ETH | 0.0000% |
81 | Binance | IDEX-USDT | $0.9981 0.0002938 Eth | $53,385,929.00 719,055,747.200 IDEX | 0.0049% |
82 | Binance | NEIRO-USDT | $0.9975 0.0002938 Eth | $50,434,926.00 53,919,600,842.000 NEIRO | 0.3700% |
83 | WhiteBIT | CRV-USDT | $0.9981 0.0002938 Eth | $49,285,553.00 48,324,149.002 CRV | 0.0003% |
84 | DigiFinex | TRX-USDT | $0.9983 0.0002938 Eth | $48,013,597.00 186,171,718.700 TRX | 0.0013% |
85 | KuCoin | XRP-USDT | $0.9981 0.0002937 Eth | $47,786,342.00 21,924,041.309 XRP | 0.0002% |
86 | Binance | PNUT-USDT | $0.9983 0.0002938 Eth | $47,769,913.00 76,500,019.500 PNUT | 0.0005% |
87 | BingX | BTC-USDT | $0.9982 0.0002937 Eth | $47,280,576.00 500.041 BTC | 0.0000% |
88 | WEEX | SOL-USDT | $0.9975 0.0002937 Eth | $46,613,617.00 247,089.640 SOL | 0.0000% |
89 | Gate.io | ONDO-USDT | $0.9982 0.0002938 Eth | $45,197,763.00 31,242,237.140 ONDO | 0.0002% |
90 | CoinW | DOGE-USDT | $0.9982 0.0002937 Eth | $43,312,778.00 133,775,766.829 DOGE | 0.0009% |
91 | Bybit | DOGE-USDT | $0.9982 0.0002937 Eth | $42,964,543.00 135,048,311.300 DOGE | 0.0009% |
92 | LBank | XRP-USDT | $0.9982 0.0002941 Eth | $42,014,374.00 19,253,857.790 XRP | 0.0001% |
93 | Hibt | BTC-USDT | $0.9982 0.0002937 Eth | $39,893,194.00 421.773 BTC | 0.0000% |
94 | KuCoin | SOL-USDT | $0.9981 0.0002937 Eth | $38,672,404.00 198,357.955 SOL | 0.0000% |
95 | Bybit | ZRC-USDT | $0.9982 0.0002937 Eth | $36,981,000.00 487,449,472.000 ZRC | 0.0033% |
96 | Binance | RSR-USDT | $0.9983 0.0002937 Eth | $36,628,720.00 2,540,379,034.900 RSR | 0.0174% |
97 | BingX | ETH-USDT | $0.9982 0.0002937 Eth | $31,128,785.00 9,261.903 ETH | 0.0000% |
98 | CoinEx | BTC-USDT | $0.9985 0.0002938 Eth | $30,878,061.00 326.271 BTC | 0.0000% |
99 | DigiFinex | DOGE-USDT | $0.9983 0.0002938 Eth | $30,125,075.00 92,982,817.980 DOGE | 0.0006% |
100 | Hibt | ETH-USDT | $0.9982 0.0002937 Eth | $23,844,811.00 7,096.387 ETH | 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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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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