Feature Tip: Add private address tag to any address under My Name Tag !
Overview
Max Total Supply
76,926,220,145.483487 USDT
Holders
6,547,972 ( -0.040%)
Market
Price
$1.00 @ 0.000287 ETH (+0.10%)
Onchain Market Cap
$76,869,294,742.58
Circulating Supply Market Cap
$139,270,894,413.00
Other Info
Token Contract (WITH 6 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | OrangeX | BTC-USDT | $0.9993 0.0002867 Eth | $2,377,766,672.00 24,423.978 BTC | 0.0000% |
2 | Binance | BTC-USDT | $0.9993 0.0002866 Eth | $2,173,604,505.00 22,329.274 BTC | 0.0000% |
3 | FameEX | BTC-USDT | $0.9993 0.0002866 Eth | $1,776,552,780.00 18,250.293 BTC | 0.0000% |
4 | Binance | USDC-USDT | $0.9992 0.0002866 Eth | $1,048,310,369.00 1,048,199,308.000 USDC | 0.0038% |
5 | Binance | ETH-USDT | $0.9992 0.0002867 Eth | $991,298,081.00 286,221.357 ETH | 0.0000% |
6 | AscendEX (BitMax) | BTC-USDT | $0.9992 0.0002866 Eth | $945,577,941.00 9,657.695 BTC | 0.0000% |
7 | Binance | FDUSD-USDT | $0.9993 0.0002866 Eth | $851,672,491.00 849,610,199.000 FDUSD | 0.0031% |
8 | Bitget | BTC-USDT | $0.9993 0.0002866 Eth | $841,597,255.00 8,653.455 BTC | 0.0000% |
9 | OKX | BTC-USDT | $0.9993 0.0002866 Eth | $821,604,972.00 8,446.949 BTC | 0.0000% |
10 | BitMart | BTC-USDT | $0.9992 0.0002866 Eth | $794,180,347.00 8,107.849 BTC | 0.0000% |
11 | Tapbit | ETH-USDT | $0.9993 0.0002866 Eth | $759,256,655.00 219,220.510 ETH | 0.0000% |
12 | FameEX | ETH-USDT | $0.9992 0.0002866 Eth | $741,197,978.00 214,006.671 ETH | 0.0000% |
13 | BitMart | ETH-USDT | $0.9992 0.0002866 Eth | $646,679,573.00 185,568.671 ETH | 0.0000% |
14 | Bybit | ETH-USDT | $0.9992 0.0002866 Eth | $609,789,102.00 175,984.439 ETH | 0.0000% |
15 | DigiFinex | BTC-USDT | $0.9992 0.0002866 Eth | $576,902,454.00 5,891.294 BTC | 0.0000% |
16 | Bitget | ETH-USDT | $0.9993 0.0002866 Eth | $566,104,031.00 163,309.226 ETH | 0.0000% |
17 | Binance | SOL-USDT | $0.9989 0.0002862 Eth | $556,484,883.00 2,838,329.876 SOL | 0.0000% |
18 | Binance | XRP-USDT | $0.9993 0.0002867 Eth | $538,386,382.00 234,224,401.000 XRP | 0.0009% |
19 | AscendEX (BitMax) | ETH-USDT | $0.9992 0.0002866 Eth | $515,600,452.00 147,989.083 ETH | 0.0000% |
20 | Binance | DOGE-USDT | $0.9992 0.0002867 Eth | $478,811,280.00 1,442,999,624.000 DOGE | 0.0053% |
21 | OKX | ETH-USDT | $0.9993 0.0002866 Eth | $465,109,201.00 134,103.865 ETH | 0.0000% |
22 | BVOX | ETH-USDT | $0.9992 0.0002867 Eth | $464,479,069.00 134,102.673 ETH | 0.0000% |
23 | HTX | BTC-USDT | $0.9993 0.0002866 Eth | $460,370,257.00 4,727.063 BTC | 0.0000% |
24 | Hotcoin | BTC-USDT | $0.9992 0.0002866 Eth | $438,704,920.00 4,479.413 BTC | 0.0000% |
25 | Ourbit | ETH-USDT | $0.9992 0.0002866 Eth | $407,973,642.00 117,855.182 ETH | 0.0000% |
26 | Gate.io | BTC-USDT | $0.9992 0.0002866 Eth | $395,232,021.00 4,054.503 BTC | 0.0000% |
27 | Binance | HBAR-USDT | $0.9993 0.0002866 Eth | $355,981,128.00 1,119,805,167.000 HBAR | 0.0041% |
28 | Bitget | BGB-USDT | $0.9993 0.0002866 Eth | $346,882,474.00 70,011,481.516 BGB | 0.0003% |
29 | Binance | PENGU-USDT | $0.9992 0.0002866 Eth | $339,206,920.00 9,533,438,192.000 PENGU | 0.0349% |
30 | Binance | PEPE-USDT | $0.9992 0.0002866 Eth | $311,067,061.00 16,398,942,474,414.000 PEPE | 60.0968% |
31 | OKX | DOGE-USDT | $0.9993 0.0002866 Eth | $283,009,855.00 854,727,423.219 DOGE | 0.0031% |
32 | Binance | USUAL-USDT | $0.9992 0.0002866 Eth | $272,363,866.00 208,977,498.000 USUAL | 0.0008% |
33 | Binance | SUI-USDT | $0.9992 0.0002866 Eth | $254,288,335.00 55,331,965.100 SUI | 0.0002% |
34 | BigONE | BTC-USDT | $0.9993 0.0002866 Eth | $252,155,265.00 2,574.915 BTC | 0.0000% |
35 | Binance | BNB-USDT | $0.9979 0.0002856 Eth | $232,455,328.00 335,267.494 BNB | 0.0000% |
36 | Biconomy.com | BTC-USDT | $0.9993 0.0002866 Eth | $221,318,529.00 2,275.289 BTC | 0.0000% |
37 | LATOKEN | BTC-USDT | $0.9992 0.0002866 Eth | $213,476,202.00 2,179.377 BTC | 0.0000% |
38 | Bybit | USDC-USDT | $0.9992 0.0002866 Eth | $207,126,491.00 207,078,120.780 USDC | 0.0008% |
39 | OKX | UXLINK-USDT | $0.9992 0.0002866 Eth | $204,177,619.00 76,754,055.700 UXLINK | 0.0003% |
40 | Binance | LINK-USDT | $0.9993 0.0002866 Eth | $196,304,379.00 7,922,812.430 LINK | 0.0000% |
41 | Gate.io | ETH-USDT | $0.9992 0.0002866 Eth | $190,368,254.00 54,948.111 ETH | 0.0000% |
42 | Coinstore | ETH-USDT | $0.9992 0.0002864 Eth | $183,215,958.00 52,956.659 ETH | 0.0000% |
43 | Bybit | XRP-USDT | $0.9992 0.0002866 Eth | $178,254,213.00 77,687,091.390 XRP | 0.0003% |
44 | KuCoin | ETH-USDT | $0.9992 0.0002866 Eth | $177,848,346.00 51,015.757 ETH | 0.0000% |
45 | KuCoin | BTC-USDT | $0.9992 0.0002866 Eth | $175,374,451.00 1,790.612 BTC | 0.0000% |
46 | Bybit | SOL-USDT | $0.9992 0.0002866 Eth | $173,629,908.00 884,965.901 SOL | 0.0000% |
47 | WhiteBIT | SOL-USDT | $0.9993 0.0002864 Eth | $171,514,852.00 865,021.893 SOL | 0.0000% |
48 | FameEX | SOL-USDT | $0.9992 0.0002864 Eth | $170,833,061.00 871,177.830 SOL | 0.0000% |
49 | DigiFinex | ETH-USDT | $0.9992 0.0002866 Eth | $170,340,810.00 48,889.873 ETH | 0.0000% |
50 | LBank | ETH-USDT | $0.9993 0.0002867 Eth | $169,155,465.00 48,520.913 ETH | 0.0000% |
51 | Bitunix | ETH-USDT | $0.9992 0.0002866 Eth | $169,055,840.00 48,476.545 ETH | 0.0000% |
52 | Binance | FTM-USDT | $0.9994 0.0002864 Eth | $152,229,770.00 156,687,739.000 FTM | 0.0006% |
53 | Bitget | XRP-USDT | $0.9993 0.0002866 Eth | $145,692,941.00 63,441,536.874 XRP | 0.0002% |
54 | WhiteBIT | XRP-USDT | $0.9993 0.0002867 Eth | $140,807,537.00 61,452,997.080 XRP | 0.0002% |
55 | WhiteBIT | PEPE-USDT | $0.9992 0.0002867 Eth | $140,119,532.00 7,466,421,530,151.000 PEPE | 27.3620% |
56 | MEXC | XRP-USDT | $0.9992 0.0002866 Eth | $139,748,188.00 61,066,799.370 XRP | 0.0002% |
57 | Binance | ADA-USDT | $0.9992 0.0002866 Eth | $135,724,781.00 146,595,221.200 ADA | 0.0005% |
58 | Binance | ZEN-USDT | $0.9993 0.0002866 Eth | $131,128,440.00 3,416,411.580 ZEN | 0.0000% |
59 | OKX | SOL-USDT | $0.9993 0.0002866 Eth | $128,790,616.00 656,412.402 SOL | 0.0000% |
60 | WhiteBIT | SUI-USDT | $0.9992 0.0002866 Eth | $125,621,571.00 27,595,748.144 SUI | 0.0001% |
61 | Bybit | MNT-USDT | $0.9992 0.0002866 Eth | $123,695,001.00 101,013,655.040 MNT | 0.0004% |
62 | Binance | ENA-USDT | $0.9992 0.0002866 Eth | $120,945,805.00 115,161,697.830 ENA | 0.0004% |
63 | HTX | ETH-USDT | $0.9993 0.0002866 Eth | $119,491,095.00 34,589.500 ETH | 0.0000% |
64 | Bybit | PENGU-USDT | $0.9993 0.0002866 Eth | $118,566,824.00 3,332,662,763.000 PENGU | 0.0122% |
65 | HTX | DOGE-USDT | $0.9993 0.0002866 Eth | $116,441,441.00 352,179,577.919 DOGE | 0.0013% |
66 | WhiteBIT | HBAR-USDT | $0.9993 0.0002866 Eth | $109,716,811.00 355,839,841.460 HBAR | 0.0013% |
67 | Binance | PNUT-USDT | $0.9993 0.0002867 Eth | $101,104,052.00 135,460,416.200 PNUT | 0.0005% |
68 | Fastex | BTC-USDT | $0.9993 0.0002866 Eth | $100,980,642.00 1,031.177 BTC | 0.0000% |
69 | Binance | AAVE-USDT | $0.9992 0.0002866 Eth | $99,772,343.00 266,686.321 AAVE | 0.0000% |
70 | LBank | DOGE-USDT | $0.9993 0.0002865 Eth | $96,383,149.00 290,183,973.000 DOGE | 0.0011% |
71 | Binance | AVAX-USDT | $0.9992 0.0002856 Eth | $95,156,330.00 2,354,444.420 AVAX | 0.0000% |
72 | DigiFinex | DOGE-USDT | $0.9992 0.0002866 Eth | $92,669,901.00 279,731,780.850 DOGE | 0.0010% |
73 | Gate.io | DOGE-USDT | $0.9992 0.0002866 Eth | $90,500,024.00 272,665,259.240 DOGE | 0.0010% |
74 | Bitget | DOGE-USDT | $0.9993 0.0002866 Eth | $88,099,515.00 265,681,395.209 DOGE | 0.0010% |
75 | Gate.io | HBAR-USDT | $0.9992 0.0002866 Eth | $84,363,165.00 264,959,494.720 HBAR | 0.0010% |
76 | Bitget | SUI-USDT | $0.9993 0.0002866 Eth | $80,756,184.00 17,564,490.950 SUI | 0.0001% |
77 | BingX | BTC-USDT | $0.9993 0.0002866 Eth | $79,001,791.00 813.271 BTC | 0.0000% |
78 | OKX | SUI-USDT | $0.9992 0.0002866 Eth | $78,561,105.00 17,092,999.275 SUI | 0.0001% |
79 | MEXC | SOL-USDT | $0.9992 0.0002866 Eth | $77,460,878.00 390,766.130 SOL | 0.0000% |
80 | OKX | XRP-USDT | $0.9993 0.0002866 Eth | $74,847,072.00 32,578,568.907 XRP | 0.0001% |
81 | Binance | TURBO-USDT | $0.9992 0.0002861 Eth | $74,543,132.00 7,114,017,293.000 TURBO | 0.0261% |
82 | WEEX | ETH-USDT | $0.9994 0.0002862 Eth | $73,868,780.00 21,320.589 ETH | 0.0000% |
83 | CoinEx | BTC-USDT | $0.9993 0.0002866 Eth | $72,833,514.00 749.693 BTC | 0.0000% |
84 | BYDFi | BTC-USDT | $0.9992 0.0002866 Eth | $71,771,799.00 732.915 BTC | 0.0000% |
85 | Binance | NEIRO-USDT | $0.9993 0.0002866 Eth | $68,371,398.00 65,310,468,982.000 NEIRO | 0.2393% |
86 | Binance | LPT-USDT | $0.9992 0.0002866 Eth | $68,337,266.00 3,546,395.830 LPT | 0.0000% |
87 | KuCoin | SOL-USDT | $0.9992 0.0002866 Eth | $67,338,496.00 339,887.422 SOL | 0.0000% |
88 | DigiFinex | TRX-USDT | $0.9992 0.0002866 Eth | $65,799,291.00 256,585,490.300 TRX | 0.0009% |
89 | Azbit | BTC-USDT | $0.9992 0.0002866 Eth | $64,851,654.00 666.250 BTC | 0.0000% |
90 | OKX | PEPE-USDT | $0.9992 0.0002866 Eth | $63,021,132.00 3,328,457,407,340.000 PEPE | 12.1977% |
91 | Binance | UNI-USDT | $0.9992 0.0002866 Eth | $62,886,906.00 4,388,640.350 UNI | 0.0000% |
92 | KuCoin | XRP-USDT | $0.9992 0.0002866 Eth | $60,420,297.00 26,396,467.646 XRP | 0.0001% |
93 | WhiteBIT | LINK-USDT | $0.9993 0.0002867 Eth | $60,420,165.00 2,436,164.060 LINK | 0.0000% |
94 | Gate.io | ONDO-USDT | $0.9992 0.0002866 Eth | $57,209,645.00 34,067,201.020 ONDO | 0.0001% |
95 | Bybit | VIRTUAL-USDT | $0.9993 0.0002866 Eth | $57,071,785.00 18,514,813.000 VIRTUAL | 0.0001% |
96 | WhiteBIT | ADA-USDT | $0.9992 0.0002866 Eth | $52,642,319.00 57,273,087.090 ADA | 0.0002% |
97 | BingX | ETH-USDT | $0.9993 0.0002866 Eth | $49,426,409.00 14,269.150 ETH | 0.0000% |
98 | DigiFinex | SOL-USDT | $0.9992 0.0002866 Eth | $44,817,626.00 226,409.590 SOL | 0.0000% |
99 | Gate.io | SUI-USDT | $0.9992 0.0002866 Eth | $44,581,254.00 9,706,562.400 SUI | 0.0000% |
100 | Bybit | SUI-USDT | $0.9992 0.0002866 Eth | $44,239,416.00 9,621,353.220 SUI | 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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