Feature Tip: Add private address tag to any address under My Name Tag !
Overview
Max Total Supply
54,940,840,345.993792 USDT
Holders
6,278,187 ( -0.007%)
Market
Price
$1.00 @ 0.000397 ETH (+0.08%)
Onchain Market Cap
$54,940,840,345.99
Circulating Supply Market Cap
$120,446,222,997.00
Other Info
Token Contract (WITH 6 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | BTC-USDT | $0.9987 0.0003965 Eth | $2,501,169,281.00 35,639.403 BTC | 0.0000% |
2 | Hotcoin | BTC-USDT | $0.9996 0.0003974 Eth | $2,023,948,821.00 28,878.548 BTC | 0.0000% |
3 | WEEX | BTC-USDT | $0.9989 0.0003966 Eth | $1,976,638,809.00 28,122.771 BTC | 0.0000% |
4 | CoinW | BTC-USDT | $0.9992 0.0003966 Eth | $1,857,729,170.00 26,503.024 BTC | 0.0000% |
5 | Toobit | BTC-USDT | $0.9989 0.0003966 Eth | $1,374,112,081.00 19,575.253 BTC | 0.0000% |
6 | Bybit | BTC-USDT | $0.9989 0.0003965 Eth | $1,297,779,151.00 18,479.591 BTC | 0.0000% |
7 | OrangeX | BTC-USDT | $0.9993 0.0003963 Eth | $1,207,496,519.00 17,182.891 BTC | 0.0000% |
8 | Pionex | BTC-USDT | $0.9989 0.0003966 Eth | $1,161,300,172.00 16,546.714 BTC | 0.0000% |
9 | DigiFinex | BTC-USDT | $0.9989 0.0003966 Eth | $928,973,639.00 13,257.837 BTC | 0.0000% |
10 | OKX | BTC-USDT | $0.9987 0.0003965 Eth | $859,227,437.00 12,216.799 BTC | 0.0000% |
11 | Toobit | ETH-USDT | $0.9997 0.0003970 Eth | $774,162,215.00 305,404.687 ETH | 0.0000% |
12 | P2B | BTC-USDT | $0.9991 0.0003970 Eth | $763,962,242.00 10,907.571 BTC | 0.0000% |
13 | Hotcoin | ETH-USDT | $0.9989 0.0003963 Eth | $753,226,124.00 298,943.742 ETH | 0.0000% |
14 | WEEX | ETH-USDT | $0.9993 0.0003963 Eth | $743,194,401.00 293,335.905 ETH | 0.0000% |
15 | BitMart | BTC-USDT | $0.9989 0.0003965 Eth | $639,532,913.00 9,124.416 BTC | 0.0000% |
16 | Bitunix | BTC-USDT | $0.999 0.0003962 Eth | $539,193,646.00 7,688.655 BTC | 0.0000% |
17 | XT.COM | BTC-USDT | $0.9986 0.0003963 Eth | $518,463,946.00 7,387.249 BTC | 0.0000% |
18 | Binance | SOL-USDT | $0.9988 0.0003963 Eth | $509,649,919.00 3,019,469.963 SOL | 0.0000% |
19 | BVOX | ETH-USDT | $0.9992 0.0003963 Eth | $472,022,003.00 186,850.577 ETH | 0.0000% |
20 | AscendEX (BitMax) | BTC-USDT | $0.9985 0.0003963 Eth | $466,226,906.00 6,654.908 BTC | 0.0000% |
21 | LBank | BTC-USDT | $0.999 0.0003966 Eth | $454,916,987.00 6,486.528 BTC | 0.0000% |
22 | OrangeX | ETH-USDT | $0.9993 0.0003963 Eth | $449,987,012.00 177,690.738 ETH | 0.0000% |
23 | Bybit | ETH-USDT | $0.9989 0.0003965 Eth | $449,191,480.00 177,352.068 ETH | 0.0000% |
24 | DigiFinex | ETH-USDT | $0.9989 0.0003966 Eth | $409,524,438.00 162,545.318 ETH | 0.0000% |
25 | OKX | ETH-USDT | $0.9985 0.0003963 Eth | $397,102,894.00 156,577.492 ETH | 0.0000% |
26 | Pionex | ETH-USDT | $0.9989 0.0003962 Eth | $396,839,988.00 156,755.994 ETH | 0.0000% |
27 | HTX | BTC-USDT | $0.999 0.0003966 Eth | $395,533,497.00 5,626.731 BTC | 0.0000% |
28 | Binance | DOGE-USDT | $0.9992 0.0003966 Eth | $370,556,327.00 2,290,313,900.000 DOGE | 0.0240% |
29 | BitMart | ETH-USDT | $0.9989 0.0003965 Eth | $367,185,611.00 145,796.060 ETH | 0.0000% |
30 | Gate.io | ETH-USDT | $0.9989 0.0003966 Eth | $357,759,067.00 141,031.562 ETH | 0.0000% |
31 | P2B | ETH-USDT | $0.9989 0.0003966 Eth | $352,989,143.00 140,115.718 ETH | 0.0000% |
32 | WhiteBIT | ETH-USDT | $0.9988 0.0003970 Eth | $351,603,641.00 139,773.682 ETH | 0.0000% |
33 | CoinW | ETH-USDT | $0.9992 0.0003967 Eth | $336,880,180.00 133,791.984 ETH | 0.0000% |
34 | MEXC | ETH-USDT | $0.999 0.0003966 Eth | $326,482,164.00 129,660.987 ETH | 0.0000% |
35 | XT.COM | ETH-USDT | $0.9995 0.0003967 Eth | $322,019,862.00 127,061.483 ETH | 0.0000% |
36 | Coinbase Exchange | USDT-USD | $0.999 0.0003966 Eth | $303,163,122.00 303,466,588.320 USDT | 0.0032% |
37 | BigONE | BTC-USDT | $0.9992 0.0003971 Eth | $297,163,744.00 4,240.163 BTC | 0.0000% |
38 | Bitget | BTC-USDT | $0.9989 0.0003965 Eth | $257,376,024.00 3,670.521 BTC | 0.0000% |
39 | AscendEX (BitMax) | ETH-USDT | $0.9985 0.0003963 Eth | $256,759,497.00 101,959.113 ETH | 0.0000% |
40 | LATOKEN | BTC-USDT | $0.9989 0.0003966 Eth | $254,862,004.00 3,636.657 BTC | 0.0000% |
41 | Biconomy.com | BTC-USDT | $0.9989 0.0003962 Eth | $239,592,403.00 3,414.667 BTC | 0.0000% |
42 | Gate.io | BTC-USDT | $0.9989 0.0003966 Eth | $232,881,412.00 3,311.253 BTC | 0.0000% |
43 | Bitunix | ETH-USDT | $0.999 0.0003962 Eth | $228,301,361.00 90,591.804 ETH | 0.0000% |
44 | Ourbit | ETH-USDT | $0.9993 0.0003963 Eth | $194,479,852.00 76,814.391 ETH | 0.0000% |
45 | KuCoin | BTC-USDT | $0.9989 0.0003965 Eth | $183,500,337.00 2,618.563 BTC | 0.0000% |
46 | LBank | ETH-USDT | $0.999 0.0003965 Eth | $180,480,271.00 71,650.171 ETH | 0.0000% |
47 | Coinstore | BTC-USDT | $0.9989 0.0003965 Eth | $169,163,521.00 2,411.066 BTC | 0.0000% |
48 | Binance | NEIRO-USDT | $0.9991 0.0003970 Eth | $166,113,684.00 105,044,076,496.000 NEIRO | 1.1010% |
49 | OKX | DOGE-USDT | $0.9985 0.0003963 Eth | $164,226,461.00 1,015,511,389.090 DOGE | 0.0106% |
50 | Binance | BNB-USDT | $0.9991 0.0003970 Eth | $157,919,128.00 273,562.348 BNB | 0.0000% |
51 | KuCoin | ETH-USDT | $0.9989 0.0003965 Eth | $152,869,202.00 60,680.272 ETH | 0.0000% |
52 | Binance | SUI-USDT | $0.9989 0.0003966 Eth | $150,969,838.00 76,433,365.200 SUI | 0.0008% |
53 | Biconomy.com | ETH-USDT | $0.999 0.0003966 Eth | $147,850,957.00 58,402.091 ETH | 0.0000% |
54 | Bitget | ETH-USDT | $0.9989 0.0003965 Eth | $140,926,093.00 55,800.936 ETH | 0.0000% |
55 | Binance | XRP-USDT | $0.9988 0.0003963 Eth | $135,010,526.00 263,387,880.000 XRP | 0.0028% |
56 | Bybit | SOL-USDT | $0.9989 0.0003965 Eth | $133,576,998.00 790,448.492 SOL | 0.0000% |
57 | Dex-Trade | BTC-USDT | $0.999 0.0003966 Eth | $132,741,786.00 1,893.821 BTC | 0.0000% |
58 | Binance | WIF-USDT | $0.9992 0.0003971 Eth | $114,694,441.00 47,953,449.260 WIF | 0.0005% |
59 | BigONE | ETH-USDT | $0.999 0.0003962 Eth | $112,934,734.00 44,817.668 ETH | 0.0000% |
60 | OKX | SOL-USDT | $0.9985 0.0003963 Eth | $112,755,057.00 667,771.401 SOL | 0.0000% |
61 | WhiteBIT | SOL-USDT | $0.999 0.0003964 Eth | $100,682,399.00 598,690.276 SOL | 0.0000% |
62 | Hotcoin | DOGE-USDT | $0.9992 0.0003967 Eth | $94,914,424.00 585,769,660.220 DOGE | 0.0061% |
63 | BTSE | ETH-USDT | $0.9986 0.0003963 Eth | $94,665,736.00 37,588.341 ETH | 0.0000% |
64 | Gate.io | DOGE-USDT | $0.9989 0.0003966 Eth | $92,632,520.00 570,993,948.756 DOGE | 0.0060% |
65 | Bitget | DOGE-USDT | $0.9989 0.0003965 Eth | $92,612,670.00 572,097,432.099 DOGE | 0.0060% |
66 | LBank | SOL-USDT | $0.999 0.0003962 Eth | $92,576,065.00 550,255.338 SOL | 0.0000% |
67 | WhiteBIT | DOGE-USDT | $0.9985 0.0003963 Eth | $80,882,510.00 499,401,050.000 DOGE | 0.0052% |
68 | Bybit | XRP-USDT | $0.9989 0.0003965 Eth | $74,919,439.00 146,345,844.280 XRP | 0.0015% |
69 | Coinbase Exchange | USDT-USDC | $0.9988 0.0003965 Eth | $74,723,468.00 74,811,608.160 USDT | 0.0008% |
70 | Coinbase Exchange | BTC-USDT | $0.9987 0.0003965 Eth | $73,904,837.00 1,054.905 BTC | 0.0000% |
71 | HTX | ETH-USDT | $0.999 0.0003966 Eth | $72,582,393.00 28,649.712 ETH | 0.0000% |
72 | Bybit | DOGE-USDT | $0.9989 0.0003965 Eth | $71,983,530.00 444,163,491.500 DOGE | 0.0047% |
73 | Bybit | MNT-USDT | $0.9989 0.0003965 Eth | $70,403,976.00 119,115,624.060 MNT | 0.0012% |
74 | Slex | BTC-USDT | $0.9989 0.0003962 Eth | $67,783,061.00 965.369 BTC | 0.0000% |
75 | Bitget | SOL-USDT | $0.9989 0.0003965 Eth | $66,516,946.00 395,000.058 SOL | 0.0000% |
76 | Binance | TIA-USDT | $0.999 0.0003963 Eth | $65,456,950.00 13,691,241.950 TIA | 0.0001% |
77 | BingX | BTC-USDT | $0.9989 0.0003966 Eth | $64,472,263.00 919.090 BTC | 0.0000% |
78 | Bitget | BGB-USDT | $0.9989 0.0003965 Eth | $63,144,228.00 55,862,238.740 BGB | 0.0006% |
79 | Gate.io | KAS-USDT | $0.999 0.0003966 Eth | $62,051,711.00 535,864,055.310 KAS | 0.0056% |
80 | HTX | DOGE-USDT | $0.999 0.0003966 Eth | $60,099,850.00 372,038,228.138 DOGE | 0.0039% |
81 | CoinEx | BTC-USDT | $0.999 0.0003962 Eth | $55,707,333.00 792.804 BTC | 0.0000% |
82 | MEXC | MX-USDT | $0.9989 0.0003962 Eth | $55,521,747.00 20,240,685.610 MX | 0.0002% |
83 | C-Patex | BTC-USDT | $0.9989 0.0003966 Eth | $54,171,112.00 773.025 BTC | 0.0000% |
84 | WhiteBIT | PEPE-USDT | $0.9985 0.0003963 Eth | $51,672,520.00 5,676,158,815,956.000 PEPE | 59.4941% |
85 | WhiteBIT | SUI-USDT | $0.9985 0.0003963 Eth | $50,094,736.00 25,625,863.867 SUI | 0.0003% |
86 | HTX | PEPE-USDT | $0.9992 0.0003966 Eth | $46,337,096.00 5,081,823,339,288.950 PEPE | 53.2646% |
87 | Bitunix | SOL-USDT | $0.999 0.0003962 Eth | $46,035,840.00 273,676.690 SOL | 0.0000% |
88 | OKX | SUI-USDT | $0.9985 0.0003963 Eth | $45,972,447.00 23,263,704.695 SUI | 0.0002% |
89 | Bitunix | DOGE-USDT | $0.999 0.0003962 Eth | $44,111,536.00 272,228,491.000 DOGE | 0.0029% |
90 | Binance | BOME-USDT | $0.999 0.0003963 Eth | $44,064,637.00 5,425,387,460.000 BOME | 0.0569% |
91 | Gate.io | SUI-USDT | $0.999 0.0003966 Eth | $44,045,686.00 22,268,513.580 SUI | 0.0002% |
92 | PointPay | BTC-USDT | $0.9989 0.0003962 Eth | $43,644,254.00 622.070 BTC | 0.0000% |
93 | DigiFinex | SOL-USDT | $0.9989 0.0003966 Eth | $40,185,335.00 239,068.860 SOL | 0.0000% |
94 | Bitget | PEPE-USDT | $0.9989 0.0003965 Eth | $39,402,121.00 4,326,699,791,148.000 PEPE | 45.3499% |
95 | BTSE | DOGE-USDT | $0.9992 0.0003966 Eth | $38,639,125.00 237,752,888.358 DOGE | 0.0025% |
96 | BingX | ETH-USDT | $0.9989 0.0003966 Eth | $37,053,681.00 14,639.796 ETH | 0.0000% |
97 | Bitget | NEIROCTO-USDT | $0.9987 0.0003965 Eth | $31,987,451.00 20,195,931,323.850 NEIROCTO | 0.2117% |
98 | OKX | PEPE-USDT | $0.9985 0.0003963 Eth | $31,915,032.00 3,492,406,163,890.000 PEPE | 36.6053% |
99 | KuCoin | SOL-USDT | $0.9989 0.0003965 Eth | $27,268,267.00 162,182.778 SOL | 0.0000% |
100 | Kraken | BTC-USDT | $0.9987 0.0003965 Eth | $24,218,455.00 345.546 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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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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