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Overview
Max Total Supply
72,928,719,896.684091 USDT
Holders
6,508,143 ( 0.189%)
Market
Price
$1.00 @ 0.000261 ETH (-0.08%)
Onchain Market Cap
$73,001,648,616.58
Circulating Supply Market Cap
$135,860,685,803.00
Other Info
Token Contract (WITH 6 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | BTC-USDT | $1.001 0.0002611 Eth | $9,754,435,826.00 96,211.243 BTC | 0.0000% |
2 | Pionex | BTC-USDT | $1.001 0.0002613 Eth | $6,819,190,249.00 67,241.030 BTC | 0.0000% |
3 | BVOX | BTC-USDT | $1.001 0.0002613 Eth | $6,360,885,885.00 62,697.918 BTC | 0.0000% |
4 | Ourbit | BTC-USDT | $1.00 0.0002614 Eth | $6,041,497,173.00 59,637.752 BTC | 0.0000% |
5 | Toobit | BTC-USDT | $1.001 0.0002613 Eth | $4,703,226,348.00 46,413.888 BTC | 0.0000% |
6 | Bybit | BTC-USDT | $1.001 0.0002611 Eth | $4,436,845,518.00 43,830.404 BTC | 0.0000% |
7 | Hotcoin | BTC-USDT | $1.00 0.0002615 Eth | $4,199,360,618.00 42,514.457 BTC | 0.0000% |
8 | DigiFinex | BTC-USDT | $1.001 0.0002611 Eth | $3,720,713,831.00 37,450.075 BTC | 0.0000% |
9 | BitMart | BTC-USDT | $1.001 0.0002612 Eth | $3,454,699,076.00 34,836.332 BTC | 0.0000% |
10 | Binance | ETH-USDT | $1.001 0.0002612 Eth | $3,382,853,865.00 873,249.145 ETH | 0.0000% |
11 | WEEX | BTC-USDT | $1.001 0.0002614 Eth | $3,219,335,047.00 32,463.220 BTC | 0.0000% |
12 | MEXC | BTC-USDT | $1.00 0.0002612 Eth | $3,025,557,749.00 30,486.352 BTC | 0.0000% |
13 | Binance | DOGE-USDT | $1.00 0.0002612 Eth | $3,008,255,440.00 6,858,777,083.000 DOGE | 0.0298% |
14 | Binance | XRP-USDT | $1.001 0.0002612 Eth | $2,742,600,498.00 1,170,431,509.000 XRP | 0.0051% |
15 | Bitunix | BTC-USDT | $1.001 0.0002614 Eth | $2,583,101,390.00 26,044.297 BTC | 0.0000% |
16 | Pionex | ETH-USDT | $1.001 0.0002611 Eth | $2,450,725,218.00 632,311.833 ETH | 0.0000% |
17 | WhiteBIT | BTC-USDT | $1.00 0.0002611 Eth | $2,411,709,576.00 24,342.914 BTC | 0.0000% |
18 | Bitget | BTC-USDT | $1.001 0.0002611 Eth | $2,298,662,202.00 22,720.097 BTC | 0.0000% |
19 | OKX | BTC-USDT | $1.001 0.0002611 Eth | $2,217,551,494.00 21,937.754 BTC | 0.0000% |
20 | LBank | BTC-USDT | $1.001 0.0002611 Eth | $2,197,618,917.00 22,130.810 BTC | 0.0000% |
21 | Toobit | ETH-USDT | $1.001 0.0002611 Eth | $2,196,492,474.00 566,902.557 ETH | 0.0000% |
22 | XT.COM | BTC-USDT | $1.00 0.0002615 Eth | $2,181,238,336.00 21,524.407 BTC | 0.0000% |
23 | Binance | FDUSD-USDT | $1.00 0.0002614 Eth | $1,778,008,879.00 1,780,216,826.000 FDUSD | 0.0077% |
24 | MEXC | ETH-USDT | $1.001 0.0002612 Eth | $1,692,864,404.00 442,925.990 ETH | 0.0000% |
25 | Bybit | ETH-USDT | $1.001 0.0002611 Eth | $1,684,666,327.00 434,926.249 ETH | 0.0000% |
26 | WEEX | ETH-USDT | $1.001 0.0002612 Eth | $1,574,252,132.00 406,820.192 ETH | 0.0000% |
27 | BitMart | ETH-USDT | $1.001 0.0002612 Eth | $1,539,734,769.00 402,246.742 ETH | 0.0000% |
28 | BVOX | ETH-USDT | $1.001 0.0002613 Eth | $1,429,257,947.00 368,870.825 ETH | 0.0000% |
29 | Bitget | ETH-USDT | $1.001 0.0002611 Eth | $1,413,278,087.00 364,833.647 ETH | 0.0000% |
30 | DigiFinex | ETH-USDT | $1.001 0.0002611 Eth | $1,188,178,669.00 309,642.195 ETH | 0.0000% |
31 | BigONE | BTC-USDT | $1.001 0.0002612 Eth | $1,125,483,948.00 11,332.432 BTC | 0.0000% |
32 | CoinW | ETH-USDT | $1.001 0.0002613 Eth | $1,113,334,954.00 290,881.803 ETH | 0.0000% |
33 | OKX | DOGE-USDT | $1.001 0.0002611 Eth | $1,081,279,614.00 2,465,441,795.103 DOGE | 0.0107% |
34 | HTX | BTC-USDT | $1.001 0.0002611 Eth | $1,049,213,067.00 10,346.604 BTC | 0.0000% |
35 | Ourbit | ETH-USDT | $1.00 0.0002613 Eth | $960,596,417.00 247,930.050 ETH | 0.0000% |
36 | OKX | ETH-USDT | $1.001 0.0002611 Eth | $943,194,306.00 243,511.502 ETH | 0.0000% |
37 | AscendEX (BitMax) | BTC-USDT | $1.001 0.0002611 Eth | $936,739,595.00 9,427.463 BTC | 0.0000% |
38 | Gate.io | BTC-USDT | $1.001 0.0002611 Eth | $924,787,045.00 9,139.854 BTC | 0.0000% |
39 | Bybit | XRP-USDT | $1.001 0.0002611 Eth | $915,896,899.00 390,696,878.220 XRP | 0.0017% |
40 | Binance | BNB-USDT | $1.001 0.0002611 Eth | $847,435,776.00 1,170,983.009 BNB | 0.0000% |
41 | Binance | SUI-USDT | $1.00 0.0002616 Eth | $791,067,519.00 196,606,716.000 SUI | 0.0009% |
42 | Bitunix | ETH-USDT | $1.001 0.0002614 Eth | $778,184,384.00 203,189.737 ETH | 0.0000% |
43 | Bitget | XRP-USDT | $1.001 0.0002611 Eth | $752,147,741.00 320,768,042.756 XRP | 0.0014% |
44 | WhiteBIT | ETH-USDT | $1.00 0.0002611 Eth | $738,944,725.00 193,215.239 ETH | 0.0000% |
45 | Binance | SHIB-USDT | $1.001 0.0002616 Eth | $723,347,243.00 22,895,534,977,674.000 SHIB | 99.3295% |
46 | Coinstore | BTC-USDT | $1.001 0.0002613 Eth | $634,545,564.00 6,247.729 BTC | 0.0000% |
47 | Bitget | DOGE-USDT | $1.001 0.0002611 Eth | $615,094,162.00 1,401,963,768.632 DOGE | 0.0061% |
48 | Biconomy.com | BTC-USDT | $1.00 0.0002612 Eth | $603,003,775.00 5,946.703 BTC | 0.0000% |
49 | BTSE | BTC-USDT | $0.9998 0.0002614 Eth | $562,987,239.00 5,682.193 BTC | 0.0000% |
50 | Gate.io | ETH-USDT | $1.001 0.0002611 Eth | $548,683,073.00 141,866.854 ETH | 0.0000% |
51 | KuCoin | BTC-USDT | $1.001 0.0002611 Eth | $526,161,128.00 5,295.736 BTC | 0.0000% |
52 | Gate.io | XRP-USDT | $1.001 0.0002611 Eth | $522,460,256.00 222,644,735.172 XRP | 0.0010% |
53 | Bybit | SOL-USDT | $1.001 0.0002611 Eth | $522,293,564.00 2,219,336.559 SOL | 0.0000% |
54 | WhiteBIT | XRP-USDT | $1.00 0.0002611 Eth | $520,534,303.00 225,299,855.880 XRP | 0.0010% |
55 | DigiFinex | TRX-USDT | $1.001 0.0002611 Eth | $515,502,163.00 1,591,844,453.500 TRX | 0.0069% |
56 | AscendEX (BitMax) | ETH-USDT | $1.001 0.0002611 Eth | $510,772,605.00 133,179.496 ETH | 0.0000% |
57 | Gate.io | DOGE-USDT | $1.001 0.0002611 Eth | $503,415,187.00 1,147,312,038.400 DOGE | 0.0050% |
58 | Binance | HBAR-USDT | $1.001 0.0002611 Eth | $485,223,495.00 1,627,064,632.000 HBAR | 0.0071% |
59 | Binance | ADA-USDT | $1.001 0.0002611 Eth | $475,642,782.00 397,549,765.600 ADA | 0.0017% |
60 | Binance | WLD-USDT | $1.001 0.0002612 Eth | $474,802,451.00 133,107,260.600 WLD | 0.0006% |
61 | CoinTR | BTC-USDT | $1.001 0.0002613 Eth | $464,875,387.00 4,589.192 BTC | 0.0000% |
62 | OKX | XRP-USDT | $1.001 0.0002611 Eth | $464,571,983.00 198,590,032.588 XRP | 0.0009% |
63 | LBank | ETH-USDT | $1.001 0.0002611 Eth | $462,685,007.00 120,676.285 ETH | 0.0000% |
64 | Binance | PNUT-USDT | $1.001 0.0002612 Eth | $451,191,089.00 330,808,906.800 PNUT | 0.0014% |
65 | Bybit | DOGE-USDT | $1.001 0.0002611 Eth | $428,572,868.00 976,790,778.000 DOGE | 0.0042% |
66 | Bitunix | DOGE-USDT | $1.001 0.0002612 Eth | $424,525,274.00 980,695,351.000 DOGE | 0.0043% |
67 | BYDFi | BTC-USDT | $1.001 0.0002614 Eth | $380,811,453.00 3,840.044 BTC | 0.0000% |
68 | Coinstore | ETH-USDT | $1.001 0.0002614 Eth | $380,714,516.00 98,054.425 ETH | 0.0000% |
69 | Binance | RENDER-USDT | $1.00 0.0002615 Eth | $376,618,093.00 36,709,001.250 RENDER | 0.0002% |
70 | Binance | LTC-USDT | $1.001 0.0002611 Eth | $372,810,598.00 2,737,470.188 LTC | 0.0000% |
71 | MEXC | DOGE-USDT | $1.00 0.0002612 Eth | $370,231,005.00 853,641,173.440 DOGE | 0.0037% |
72 | WhiteBIT | DOGE-USDT | $1.001 0.0002613 Eth | $361,824,801.00 836,975,704.200 DOGE | 0.0036% |
73 | OKX | SOL-USDT | $1.001 0.0002611 Eth | $357,689,966.00 1,516,130.735 SOL | 0.0000% |
74 | DigiFinex | DOGE-USDT | $1.001 0.0002611 Eth | $343,101,094.00 791,876,712.580 DOGE | 0.0034% |
75 | Bitunix | XRP-USDT | $1.001 0.0002612 Eth | $340,569,483.00 147,405,996.000 XRP | 0.0006% |
76 | Binance | SAND-USDT | $1.001 0.0002611 Eth | $332,790,173.00 359,171,672.000 SAND | 0.0016% |
77 | Binance | JASMY-USDT | $1.00 0.0002616 Eth | $309,775,072.00 6,285,677,772.600 JASMY | 0.0273% |
78 | Biconomy.com | ETH-USDT | $1.00 0.0002613 Eth | $300,105,698.00 77,396.900 ETH | 0.0000% |
79 | Coinbase Exchange | USDT-USDC | $1.00 0.0002611 Eth | $278,171,617.00 278,173,618.640 USDT | 0.0012% |
80 | Binance | AVAX-USDT | $1.001 0.0002611 Eth | $273,537,900.00 5,249,030.200 AVAX | 0.0000% |
81 | Binance | DOT-USDT | $1.001 0.0002611 Eth | $270,452,782.00 25,319,097.060 DOT | 0.0001% |
82 | KuCoin | ETH-USDT | $1.001 0.0002611 Eth | $269,767,140.00 70,343.922 ETH | 0.0000% |
83 | HTX | ETH-USDT | $1.001 0.0002611 Eth | $266,833,725.00 68,788.503 ETH | 0.0000% |
84 | Toobit | XRP-USDT | $1.001 0.0002613 Eth | $262,758,980.00 112,092,560.000 XRP | 0.0005% |
85 | Toobit | DOGE-USDT | $1.001 0.0002613 Eth | $256,678,233.00 584,846,479.000 DOGE | 0.0025% |
86 | Azbit | BTC-USDT | $1.00 0.0002612 Eth | $255,753,710.00 2,513.006 BTC | 0.0000% |
87 | HTX | DOGE-USDT | $1.001 0.0002611 Eth | $253,241,681.00 578,405,397.088 DOGE | 0.0025% |
88 | Deepcoin | DOGE-USDT | $1.00 0.0002614 Eth | $239,654,027.00 546,297,465.311 DOGE | 0.0024% |
89 | WEEX | DOGE-USDT | $1.001 0.0002612 Eth | $230,456,186.00 532,216,621.983 DOGE | 0.0023% |
90 | KuCoin | XRP-USDT | $1.001 0.0002611 Eth | $230,223,382.00 99,572,397.225 XRP | 0.0004% |
91 | WEEX | SOL-USDT | $1.001 0.0002612 Eth | $229,364,013.00 975,974.478 SOL | 0.0000% |
92 | Slex | BTC-USDT | $1.001 0.0002613 Eth | $217,090,325.00 2,140.845 BTC | 0.0000% |
93 | OrangeX | DOGE-USDT | $1.00 0.0002612 Eth | $215,442,505.00 491,975,261.000 DOGE | 0.0021% |
94 | Binance | NEIRO-USDT | $1.00 0.0002611 Eth | $211,386,807.00 119,272,001,567.000 NEIRO | 0.5174% |
95 | Binance | NEAR-USDT | $1.001 0.0002612 Eth | $207,543,693.00 27,211,773.500 NEAR | 0.0001% |
96 | Binance | FIL-USDT | $1.001 0.0002611 Eth | $197,344,599.00 24,725,098.070 FIL | 0.0001% |
97 | Bitget | SUI-USDT | $1.001 0.0002611 Eth | $194,809,297.00 48,411,846.930 SUI | 0.0002% |
98 | Poloniex | BTC-USDT | $1.001 0.0002614 Eth | $185,391,223.00 1,831.726 BTC | 0.0000% |
99 | Binance | ENA-USDT | $1.001 0.0002612 Eth | $157,695,475.00 169,357,580.530 ENA | 0.0007% |
100 | KuCoin | SOL-USDT | $1.001 0.0002611 Eth | $142,064,696.00 609,487.638 SOL | 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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