Overview
Max Total Supply
76,926,220,145.483487 USDT
Holders
6,548,289 ( -0.038%)
Market
Price
$1.00 @ 0.000288 ETH (-0.13%)
Onchain Market Cap
$76,777,290,983.28
Circulating Supply Market Cap
$139,206,761,897.00
Other Info
Token Contract (WITH 6 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | BTC-USDT | $0.9992 0.0002893 Eth | $1,413,423,612.00 14,362.518 BTC | 0.0000% |
2 | FameEX | BTC-USDT | $0.9994 0.0002896 Eth | $1,162,569,407.00 11,812.178 BTC | 0.0000% |
3 | BVOX | BTC-USDT | $0.9987 0.0002891 Eth | $1,124,076,395.00 11,428.668 BTC | 0.0000% |
4 | AscendEX (BitMax) | BTC-USDT | $0.9992 0.0002893 Eth | $935,768,733.00 9,500.457 BTC | 0.0000% |
5 | Tapbit | ETH-USDT | $0.999 0.0002896 Eth | $572,757,384.00 164,455.533 ETH | 0.0000% |
6 | Binance | FDUSD-USDT | $0.9989 0.0002893 Eth | $565,197,706.00 563,962,746.000 FDUSD | 0.0077% |
7 | Bitget | BTC-USDT | $0.9989 0.0002893 Eth | $546,189,580.00 5,554.885 BTC | 0.0000% |
8 | Bybit | ETH-USDT | $0.9992 0.0002894 Eth | $518,691,998.00 148,871.026 ETH | 0.0000% |
9 | Toobit | ETH-USDT | $0.9987 0.0002891 Eth | $512,998,905.00 147,325.873 ETH | 0.0000% |
10 | OKX | BTC-USDT | $0.9992 0.0002893 Eth | $511,964,247.00 5,202.976 BTC | 0.0000% |
11 | AscendEX (BitMax) | ETH-USDT | $0.9992 0.0002893 Eth | $507,507,662.00 146,847.896 ETH | 0.0000% |
12 | Bitget | ETH-USDT | $0.9989 0.0002893 Eth | $464,671,428.00 133,440.829 ETH | 0.0000% |
13 | Binance | DOGE-USDT | $0.9993 0.0002888 Eth | $397,891,486.00 1,194,790,926.000 DOGE | 0.0164% |
14 | Binance | SOL-USDT | $0.9989 0.0002893 Eth | $388,808,520.00 1,962,010.509 SOL | 0.0000% |
15 | DigiFinex | BTC-USDT | $0.9989 0.0002893 Eth | $371,068,093.00 3,767.324 BTC | 0.0000% |
16 | HTX | BTC-USDT | $0.9992 0.0002893 Eth | $350,603,501.00 3,562.994 BTC | 0.0000% |
17 | OKX | ETH-USDT | $0.9992 0.0002894 Eth | $346,285,548.00 99,387.485 ETH | 0.0000% |
18 | P2B | BTC-USDT | $0.9987 0.0002891 Eth | $336,924,760.00 3,419.418 BTC | 0.0000% |
19 | Binance | MOVE-USDT | $0.9987 0.0002891 Eth | $309,571,051.00 289,700,174.000 MOVE | 0.0040% |
20 | CoinW | BTC-USDT | $0.9987 0.0002891 Eth | $294,297,350.00 2,986.097 BTC | 0.0000% |
21 | Binance | HBAR-USDT | $0.9994 0.0002887 Eth | $220,272,922.00 693,243,488.000 HBAR | 0.0095% |
22 | XT.COM | BTC-USDT | $0.9992 0.0002893 Eth | $208,933,191.00 2,123.118 BTC | 0.0000% |
23 | Binance | PENGU-USDT | $0.9987 0.0002891 Eth | $205,313,640.00 5,603,876,320.000 PENGU | 0.0770% |
24 | Gate.io | BTC-USDT | $0.9992 0.0002893 Eth | $202,963,248.00 2,062.326 BTC | 0.0000% |
25 | OKX | DOGE-USDT | $0.9992 0.0002894 Eth | $189,840,374.00 569,652,753.471 DOGE | 0.0078% |
26 | Binance | ZEN-USDT | $0.9989 0.0002893 Eth | $179,492,604.00 4,390,123.450 ZEN | 0.0001% |
27 | CoinW | ETH-USDT | $0.9993 0.0002896 Eth | $173,165,129.00 50,200.490 ETH | 0.0000% |
28 | Binance | SUI-USDT | $0.9989 0.0002893 Eth | $171,373,734.00 37,696,387.100 SUI | 0.0005% |
29 | OKX | MOVE-USDT | $0.9992 0.0002894 Eth | $152,291,151.00 143,423,780.000 MOVE | 0.0020% |
30 | Gate.io | ETH-USDT | $0.9992 0.0002893 Eth | $150,888,929.00 43,301.325 ETH | 0.0000% |
31 | LBank | ETH-USDT | $0.9989 0.0002893 Eth | $149,021,444.00 43,137.026 ETH | 0.0000% |
32 | Coinstore | ETH-USDT | $0.9987 0.0002891 Eth | $141,364,351.00 40,632.186 ETH | 0.0000% |
33 | Bybit | SOL-USDT | $0.9992 0.0002894 Eth | $140,653,344.00 709,490.635 SOL | 0.0000% |
34 | KuCoin | BTC-USDT | $0.9991 0.0002892 Eth | $135,857,509.00 1,378.674 BTC | 0.0000% |
35 | Bybit | XRP-USDT | $0.9992 0.0002894 Eth | $134,860,025.00 58,735,929.470 XRP | 0.0008% |
36 | LBank | SOL-USDT | $0.9993 0.0002896 Eth | $133,178,375.00 678,673.914 SOL | 0.0000% |
37 | DigiFinex | ETH-USDT | $0.9989 0.0002893 Eth | $132,805,635.00 38,448.284 ETH | 0.0000% |
38 | Binance | COW-USDT | $0.9987 0.0002884 Eth | $132,687,626.00 120,085,338.900 COW | 0.0016% |
39 | Binance | LINK-USDT | $0.9989 0.0002893 Eth | $132,225,059.00 5,303,043.100 LINK | 0.0001% |
40 | Bitget | MOVE-USDT | $0.9989 0.0002893 Eth | $128,338,317.00 121,753,951.850 MOVE | 0.0017% |
41 | Bybit | MNT-USDT | $0.9992 0.0002894 Eth | $127,742,574.00 102,681,607.040 MNT | 0.0014% |
42 | KuCoin | ETH-USDT | $0.9991 0.0002892 Eth | $124,241,912.00 35,960.449 ETH | 0.0000% |
43 | XT.COM | ETH-USDT | $0.9992 0.0002893 Eth | $120,986,944.00 34,728.377 ETH | 0.0000% |
44 | Binance | TRX-USDT | $0.9989 0.0002893 Eth | $116,727,192.00 454,938,857.000 TRX | 0.0062% |
45 | WhiteBIT | DOGE-USDT | $0.9994 0.0002886 Eth | $116,498,841.00 352,520,285.900 DOGE | 0.0048% |
46 | CoinW | XRP-USDT | $0.9987 0.0002891 Eth | $115,298,054.00 50,192,228.400 XRP | 0.0007% |
47 | HTX | DOGE-USDT | $0.9992 0.0002893 Eth | $109,028,651.00 327,566,191.640 DOGE | 0.0045% |
48 | LATOKEN | ETH-USDT | $0.9995 0.0002883 Eth | $100,856,085.00 29,116.367 ETH | 0.0000% |
49 | OKX | SOL-USDT | $0.9992 0.0002894 Eth | $98,859,271.00 498,541.238 SOL | 0.0000% |
50 | Binance | ADA-USDT | $0.999 0.0002896 Eth | $92,565,260.00 100,478,871.800 ADA | 0.0014% |
51 | LBank | DOGE-USDT | $0.9989 0.0002896 Eth | $91,102,339.00 276,674,302.000 DOGE | 0.0038% |
52 | Bybit | VANA-USDT | $0.9992 0.0002893 Eth | $87,134,194.00 4,638,396.850 VANA | 0.0001% |
53 | Binance | ENA-USDT | $0.9989 0.0002893 Eth | $87,087,172.00 84,121,155.410 ENA | 0.0012% |
54 | WhiteBIT | HBAR-USDT | $0.9995 0.0002893 Eth | $81,316,556.00 261,389,586.900 HBAR | 0.0036% |
55 | Bybit | PENGU-USDT | $0.9992 0.0002893 Eth | $80,944,509.00 2,215,510,302.000 PENGU | 0.0304% |
56 | Bitget | DOGE-USDT | $0.9989 0.0002893 Eth | $73,843,913.00 221,941,175.520 DOGE | 0.0030% |
57 | CoinW | DOGE-USDT | $0.9992 0.0002893 Eth | $71,382,486.00 216,576,380.688 DOGE | 0.0030% |
58 | BingX | BTC-USDT | $0.9989 0.0002893 Eth | $70,456,506.00 716.329 BTC | 0.0000% |
59 | Hibt | BTC-USDT | $0.9992 0.0002893 Eth | $70,273,953.00 714.068 BTC | 0.0000% |
60 | OKX | XRP-USDT | $0.9992 0.0002894 Eth | $68,482,193.00 29,833,130.112 XRP | 0.0004% |
61 | Binance | TURBO-USDT | $0.9989 0.0002893 Eth | $68,474,642.00 6,213,433,231.000 TURBO | 0.0854% |
62 | Binance | FTM-USDT | $0.9989 0.0002892 Eth | $64,959,920.00 65,451,330.000 FTM | 0.0009% |
63 | DigiFinex | DOGE-USDT | $0.9989 0.0002893 Eth | $61,955,217.00 187,831,894.030 DOGE | 0.0026% |
64 | Binance | LPT-USDT | $0.9986 0.0002890 Eth | $60,521,758.00 3,079,548.880 LPT | 0.0000% |
65 | Gate.io | VIRTUAL-USDT | $0.9989 0.0002893 Eth | $59,268,863.00 19,145,714.480 VIRTUAL | 0.0003% |
66 | Bitget | SUI-USDT | $0.9989 0.0002893 Eth | $58,943,031.00 12,968,215.030 SUI | 0.0002% |
67 | OKX | SUI-USDT | $0.9992 0.0002894 Eth | $57,032,557.00 12,523,881.847 SUI | 0.0002% |
68 | Gate.io | HBAR-USDT | $0.9992 0.0002893 Eth | $56,928,377.00 179,332,138.920 HBAR | 0.0025% |
69 | OKX | PEPE-USDT | $0.9992 0.0002894 Eth | $56,652,718.00 3,010,764,751,304.000 PEPE | 41.3586% |
70 | Bybit | VIRTUAL-USDT | $0.9992 0.0002893 Eth | $55,783,105.00 18,001,582.000 VIRTUAL | 0.0002% |
71 | DigiFinex | TRX-USDT | $0.9989 0.0002893 Eth | $53,917,532.00 210,249,543.900 TRX | 0.0029% |
72 | Binance | BONK-USDT | $0.999 0.0002895 Eth | $53,844,747.00 1,614,807,238,149.000 BONK | 22.1824% |
73 | Binance | ME-USDT | $0.9989 0.0002893 Eth | $53,690,439.00 15,555,205.270 ME | 0.0002% |
74 | Bybit | DOGE-USDT | $0.9992 0.0002894 Eth | $52,780,105.00 158,553,667.000 DOGE | 0.0022% |
75 | Bitget | VIRTUAL-USDT | $0.9989 0.0002893 Eth | $49,353,623.00 15,996,418.440 VIRTUAL | 0.0002% |
76 | Binance | LTC-USDT | $0.9989 0.0002893 Eth | $49,347,090.00 454,952.143 LTC | 0.0000% |
77 | KuCoin | XRP-USDT | $0.9991 0.0002892 Eth | $48,395,434.00 21,070,876.274 XRP | 0.0003% |
78 | KuCoin | SOL-USDT | $0.9991 0.0002892 Eth | $46,769,180.00 238,052.249 SOL | 0.0000% |
79 | Binance | NEAR-USDT | $0.9989 0.0002893 Eth | $45,218,390.00 8,203,148.900 NEAR | 0.0001% |
80 | Hibt | ETH-USDT | $0.9991 0.0002892 Eth | $44,965,238.00 12,907.440 ETH | 0.0000% |
81 | Bybit | PEPE-USDT | $0.9992 0.0002894 Eth | $44,844,684.00 2,386,805,254,307.000 PEPE | 32.7873% |
82 | BingX | ETH-USDT | $0.9989 0.0002893 Eth | $41,513,092.00 11,923.877 ETH | 0.0000% |
83 | Binance | SAND-USDT | $0.9987 0.0002891 Eth | $41,401,320.00 66,496,610.000 SAND | 0.0009% |
84 | Bitget | NEIROCTO-USDT | $0.9989 0.0002893 Eth | $39,642,390.00 38,391,740,340.680 NEIROCTO | 0.5274% |
85 | Gate.io | SUI-USDT | $0.9989 0.0002893 Eth | $38,411,952.00 8,458,997.320 SUI | 0.0001% |
86 | Binance | ARB-USDT | $0.9989 0.0002893 Eth | $37,009,593.00 46,014,432.900 ARB | 0.0006% |
87 | Binance | FLOKI-USDT | $0.9994 0.0002896 Eth | $36,323,462.00 203,221,170,507.000 FLOKI | 2.7916% |
88 | Gate.io | ONDO-USDT | $0.9989 0.0002893 Eth | $35,457,646.00 21,296,306.820 ONDO | 0.0003% |
89 | Binance | FIL-USDT | $0.9989 0.0002893 Eth | $33,912,190.00 6,320,465.980 FIL | 0.0001% |
90 | DigiFinex | SOL-USDT | $0.9989 0.0002893 Eth | $32,299,065.00 164,437.000 SOL | 0.0000% |
91 | Binance | TON-USDT | $0.9986 0.0002888 Eth | $31,148,853.00 5,246,608.220 TON | 0.0001% |
92 | DigiFinex | SUI-USDT | $0.9989 0.0002893 Eth | $30,884,636.00 6,882,339.200 SUI | 0.0001% |
93 | HTX | XRP-USDT | $0.9992 0.0002894 Eth | $27,354,426.00 11,908,883.510 XRP | 0.0002% |
94 | Binance | ZEC-USDT | $0.9989 0.0002893 Eth | $27,292,097.00 369,444.243 ZEC | 0.0000% |
95 | Binance | BOME-USDT | $0.9989 0.0002893 Eth | $27,214,121.00 4,072,864,490.000 BOME | 0.0559% |
96 | KuCoin | DOGE-USDT | $0.9991 0.0002892 Eth | $25,564,599.00 77,505,004.906 DOGE | 0.0011% |
97 | DigiFinex | XRP-USDT | $0.9989 0.0002893 Eth | $24,387,972.00 10,624,518.000 XRP | 0.0001% |
98 | Binance | RENDER-USDT | $0.9989 0.0002893 Eth | $23,596,553.00 3,085,338.380 RENDER | 0.0000% |
99 | HTX | TRX-USDT | $0.9992 0.0002894 Eth | $20,795,896.00 81,039,034.691 TRX | 0.0011% |
100 | WhiteBIT | AVAX-USDT | $0.9995 0.0002893 Eth | $16,440,231.00 411,844.083 AVAX | 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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