Overview
Max Total Supply
70,929,452,093.657795 USDT
Holders
6,442,059 ( 0.003%)
Market
Price
$1.00 @ 0.000274 ETH (+0.05%)
Onchain Market Cap
$71,000,381,545.75
Circulating Supply Market Cap
$133,479,926,233.00
Other Info
Token Contract (WITH 6 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | BTC-USDT | $1.001 0.0002742 Eth | $2,663,444,493.00 27,389.713 BTC | 0.0000% |
2 | BVOX | BTC-USDT | $1.00 0.0002741 Eth | $2,057,066,568.00 21,160.395 BTC | 0.0000% |
3 | Binance | XRP-USDT | $1.001 0.0002742 Eth | $2,040,818,297.00 1,188,212,604.390 XRP | 0.0123% |
4 | Bybit | BTC-USDT | $1.00 0.0002741 Eth | $2,027,400,425.00 20,887.496 BTC | 0.0000% |
5 | CoinW | BTC-USDT | $1.00 0.0002743 Eth | $1,996,448,563.00 20,663.096 BTC | 0.0000% |
6 | Binance | ETH-USDT | $1.00 0.0002746 Eth | $1,654,714,370.00 459,923.146 ETH | 0.0000% |
7 | Binance | DOGE-USDT | $1.00 0.0002745 Eth | $1,372,936,200.00 3,268,927,317.000 DOGE | 0.0338% |
8 | Tapbit | ETH-USDT | $1.00 0.0002744 Eth | $1,280,138,492.00 355,858.674 ETH | 0.0000% |
9 | WEEX | BTC-USDT | $1.00 0.0002741 Eth | $1,271,947,808.00 13,081.365 BTC | 0.0000% |
10 | WhiteBIT | BTC-USDT | $1.00 0.0002744 Eth | $1,137,872,394.00 11,776.777 BTC | 0.0000% |
11 | Toobit | ETH-USDT | $1.00 0.0002743 Eth | $1,104,420,099.00 306,980.720 ETH | 0.0000% |
12 | DigiFinex | BTC-USDT | $1.00 0.0002741 Eth | $1,085,394,847.00 11,230.196 BTC | 0.0000% |
13 | AscendEX (BitMax) | BTC-USDT | $1.00 0.0002741 Eth | $938,111,872.00 9,703.882 BTC | 0.0000% |
14 | LBank | BTC-USDT | $1.00 0.0002744 Eth | $926,536,456.00 9,589.276 BTC | 0.0000% |
15 | P2B | BTC-USDT | $1.00 0.0002741 Eth | $855,931,402.00 8,855.745 BTC | 0.0000% |
16 | OKX | BTC-USDT | $1.001 0.0002742 Eth | $734,134,672.00 7,554.344 BTC | 0.0000% |
17 | BitMart | BTC-USDT | $1.00 0.0002741 Eth | $723,276,904.00 7,482.604 BTC | 0.0000% |
18 | MEXC | ETH-USDT | $1.00 0.0002741 Eth | $716,672,897.00 196,371.829 ETH | 0.0000% |
19 | Deepcoin | BTC-USDT | $1.00 0.0002741 Eth | $704,091,377.00 7,309.623 BTC | 0.0000% |
20 | WEEX | ETH-USDT | $1.00 0.0002742 Eth | $700,341,651.00 194,597.221 ETH | 0.0000% |
21 | Bybit | ETH-USDT | $1.00 0.0002741 Eth | $698,523,091.00 194,309.705 ETH | 0.0000% |
22 | Binance | SOL-USDT | $1.00 0.0002744 Eth | $687,995,159.00 2,838,460.946 SOL | 0.0000% |
23 | Binance | FDUSD-USDT | $1.00 0.0002745 Eth | $680,210,437.00 681,048,370.000 FDUSD | 0.0070% |
24 | P2B | ETH-USDT | $1.00 0.0002741 Eth | $610,745,748.00 167,391.789 ETH | 0.0000% |
25 | DigiFinex | ETH-USDT | $1.00 0.0002741 Eth | $606,328,177.00 166,157.361 ETH | 0.0000% |
26 | BitMart | ETH-USDT | $1.00 0.0002741 Eth | $597,034,612.00 163,589.100 ETH | 0.0000% |
27 | XT.COM | BTC-USDT | $1.00 0.0002741 Eth | $591,528,183.00 6,083.847 BTC | 0.0000% |
28 | Bitget | BTC-USDT | $1.00 0.0002741 Eth | $554,555,494.00 5,698.601 BTC | 0.0000% |
29 | Binance | ACT-USDT | $1.00 0.0002741 Eth | $541,030,886.00 828,359,609.700 ACT | 0.0086% |
30 | Bitget | XRP-USDT | $1.00 0.0002741 Eth | $540,048,225.00 315,078,196.908 XRP | 0.0033% |
31 | MEXC | XRP-USDT | $1.00 0.0002741 Eth | $536,299,860.00 291,642,218.110 XRP | 0.0030% |
32 | AscendEX (BitMax) | ETH-USDT | $1.00 0.0002741 Eth | $524,394,236.00 143,677.796 ETH | 0.0000% |
33 | Binance | XLM-USDT | $1.00 0.0002744 Eth | $498,698,527.00 939,629,863.000 XLM | 0.0097% |
34 | Bybit | XRP-USDT | $1.00 0.0002741 Eth | $485,950,271.00 283,385,091.300 XRP | 0.0029% |
35 | Binance | PNUT-USDT | $1.001 0.0002742 Eth | $473,561,827.00 377,012,926.200 PNUT | 0.0039% |
36 | Bitget | ETH-USDT | $1.00 0.0002741 Eth | $462,907,534.00 128,503.560 ETH | 0.0000% |
37 | HTX | BTC-USDT | $1.00 0.0002741 Eth | $458,539,700.00 4,719.744 BTC | 0.0000% |
38 | XT.COM | ETH-USDT | $1.00 0.0002743 Eth | $458,536,085.00 127,495.900 ETH | 0.0000% |
39 | Gate.io | XRP-USDT | $1.001 0.0002742 Eth | $444,719,274.00 258,375,131.125 XRP | 0.0027% |
40 | OKX | ETH-USDT | $1.00 0.0002741 Eth | $443,836,632.00 123,335.311 ETH | 0.0000% |
41 | OKX | DOGE-USDT | $1.00 0.0002741 Eth | $442,634,408.00 1,056,102,607.029 DOGE | 0.0109% |
42 | WhiteBIT | ETH-USDT | $1.00 0.0002744 Eth | $440,372,839.00 120,514.656 ETH | 0.0000% |
43 | Coinbase Exchange | USDT-USD | $1.00 0.0002742 Eth | $399,818,969.00 399,643,126.350 USDT | 0.0041% |
44 | Bitunix | ETH-USDT | $1.00 0.0002748 Eth | $375,582,363.00 102,980.963 ETH | 0.0000% |
45 | Binance | ADA-USDT | $1.001 0.0002747 Eth | $370,449,226.00 348,390,268.300 ADA | 0.0036% |
46 | LATOKEN | BTC-USDT | $1.00 0.0002741 Eth | $356,765,197.00 3,692.068 BTC | 0.0000% |
47 | BigONE | BTC-USDT | $1.00 0.0002741 Eth | $314,353,432.00 3,252.081 BTC | 0.0000% |
48 | Binance | ALGO-USDT | $1.001 0.0002742 Eth | $302,791,869.00 753,986,324.000 ALGO | 0.0078% |
49 | OKX | XRP-USDT | $1.00 0.0002741 Eth | $297,024,091.00 172,582,613.741 XRP | 0.0018% |
50 | WhiteBIT | XRP-USDT | $1.00 0.0002741 Eth | $288,334,654.00 156,342,170.170 XRP | 0.0016% |
51 | OrangeX | ETH-USDT | $1.00 0.0002748 Eth | $286,805,503.00 79,782.095 ETH | 0.0000% |
52 | Bitunix | XRP-USDT | $1.00 0.0002748 Eth | $281,487,891.00 153,285,083.000 XRP | 0.0016% |
53 | Binance | HBAR-USDT | $1.001 0.0002742 Eth | $276,168,745.00 1,669,799,404.000 HBAR | 0.0173% |
54 | Bitget | DOGE-USDT | $1.00 0.0002741 Eth | $255,117,110.00 605,110,289.514 DOGE | 0.0063% |
55 | Deepcoin | XRP-USDT | $1.00 0.0002741 Eth | $248,334,077.00 147,333,569.951 XRP | 0.0015% |
56 | Coinstore | ETH-USDT | $1.00 0.0002743 Eth | $235,816,829.00 65,562.522 ETH | 0.0000% |
57 | Kraken | USDT-USD | $1.00 0.0002742 Eth | $228,499,574.00 228,399,078.527 USDT | 0.0024% |
58 | Binance | SUI-USDT | $1.001 0.0002745 Eth | $216,315,075.00 62,491,528.400 SUI | 0.0006% |
59 | KuCoin | XRP-USDT | $1.00 0.0002741 Eth | $195,264,058.00 105,813,163.920 XRP | 0.0011% |
60 | MEXC | DOGE-USDT | $1.00 0.0002745 Eth | $193,387,649.00 458,364,414.380 DOGE | 0.0047% |
61 | Bitunix | DOGE-USDT | $1.00 0.0002748 Eth | $192,239,706.00 456,638,209.000 DOGE | 0.0047% |
62 | Bybit | SOL-USDT | $1.00 0.0002741 Eth | $178,777,698.00 737,415.814 SOL | 0.0000% |
63 | HTX | ETH-USDT | $1.00 0.0002741 Eth | $178,433,695.00 49,574.963 ETH | 0.0000% |
64 | Bybit | DOGE-USDT | $1.00 0.0002741 Eth | $177,042,573.00 419,695,184.400 DOGE | 0.0043% |
65 | Gate.io | DOGE-USDT | $1.001 0.0002742 Eth | $175,175,365.00 417,908,872.970 DOGE | 0.0043% |
66 | Deepcoin | UXLINK-USDT | $1.00 0.0002744 Eth | $167,242,565.00 276,140,041.462 UXLINK | 0.0029% |
67 | BigONE | ETH-USDT | $1.00 0.0002741 Eth | $166,576,065.00 45,625.766 ETH | 0.0000% |
68 | Gate.io | BTC-USDT | $1.001 0.0002742 Eth | $164,741,575.00 1,695.061 BTC | 0.0000% |
69 | KuCoin | BTC-USDT | $1.00 0.0002741 Eth | $160,519,266.00 1,660.588 BTC | 0.0000% |
70 | HTX | DOGE-USDT | $1.00 0.0002741 Eth | $156,821,890.00 374,937,776.614 DOGE | 0.0039% |
71 | WhiteBIT | SOL-USDT | $1.00 0.0002741 Eth | $155,001,713.00 638,698.981 SOL | 0.0000% |
72 | LBank | SOL-USDT | $1.00 0.0002744 Eth | $153,759,183.00 633,445.072 SOL | 0.0000% |
73 | DigiFinex | DOGE-USDT | $1.00 0.0002741 Eth | $147,147,954.00 348,337,956.470 DOGE | 0.0036% |
74 | OKX | SOL-USDT | $1.00 0.0002741 Eth | $143,141,615.00 589,988.690 SOL | 0.0000% |
75 | Bitunix | ACT-USDT | $1.00 0.0002748 Eth | $137,847,567.00 175,050,662.470 ACT | 0.0018% |
76 | LBank | DOGE-USDT | $1.001 0.0002742 Eth | $134,520,413.00 318,580,311.000 DOGE | 0.0033% |
77 | Gate.io | ETH-USDT | $1.001 0.0002742 Eth | $132,322,200.00 36,770.045 ETH | 0.0000% |
78 | Deepcoin | SOL-USDT | $1.00 0.0002743 Eth | $132,064,525.00 581,949.575 SOL | 0.0000% |
79 | WhiteBIT | ADA-USDT | $1.00 0.0002741 Eth | $123,660,308.00 115,997,278.790 ADA | 0.0012% |
80 | WhiteBIT | PNUT-USDT | $1.00 0.0002741 Eth | $122,535,026.00 96,730,600.500 PNUT | 0.0010% |
81 | Toobit | DOGE-USDT | $1.00 0.0002742 Eth | $120,735,455.00 287,602,696.000 DOGE | 0.0030% |
82 | Gate.io | PEPE-USDT | $1.00 0.0002741 Eth | $117,994,871.00 5,780,872,760,233.000 PEPE | 59.8137% |
83 | Binance | ENA-USDT | $1.001 0.0002742 Eth | $116,033,534.00 152,440,913.420 ENA | 0.0016% |
84 | KuCoin | ETH-USDT | $1.00 0.0002741 Eth | $114,402,501.00 31,349.654 ETH | 0.0000% |
85 | MEXC | HBAR-USDT | $1.00 0.0002744 Eth | $111,589,415.00 667,783,924.000 HBAR | 0.0069% |
86 | OrangeX | XRP-USDT | $1.00 0.0002741 Eth | $108,071,817.00 63,228,747.000 XRP | 0.0007% |
87 | WhiteBIT | DOGE-USDT | $1.00 0.0002745 Eth | $102,565,311.00 242,895,215.600 DOGE | 0.0025% |
88 | Binance | TIA-USDT | $1.00 0.0002742 Eth | $101,192,596.00 12,476,429.670 TIA | 0.0001% |
89 | BVOX | DOGE-USDT | $1.00 0.0002745 Eth | $97,986,717.00 234,082,012.000 DOGE | 0.0024% |
90 | BYDFi | BTC-USDT | $1.00 0.0002746 Eth | $96,359,364.00 997.204 BTC | 0.0000% |
91 | WEEX | DOGE-USDT | $1.00 0.0002741 Eth | $95,965,082.00 228,346,783.791 DOGE | 0.0024% |
92 | Deepcoin | DOGE-USDT | $1.00 0.0002743 Eth | $95,053,951.00 227,035,143.603 DOGE | 0.0023% |
93 | Bybit | MNT-USDT | $1.00 0.0002741 Eth | $93,099,291.00 107,032,068.370 MNT | 0.0011% |
94 | DigiFinex | XRP-USDT | $1.00 0.0002741 Eth | $92,307,129.00 50,024,611.000 XRP | 0.0005% |
95 | Binance | ARB-USDT | $1.00 0.0002741 Eth | $89,104,193.00 95,963,874.800 ARB | 0.0010% |
96 | Bitunix | SOL-USDT | $1.00 0.0002748 Eth | $87,405,479.00 359,997.294 SOL | 0.0000% |
97 | WhiteBIT | PEPE-USDT | $1.00 0.0002741 Eth | $79,220,814.00 3,863,721,356,988.000 PEPE | 39.9773% |
98 | Binance | EOS-USDT | $1.00 0.0002745 Eth | $71,342,608.00 77,622,105.400 EOS | 0.0008% |
99 | BingX | BTC-USDT | $1.00 0.0002741 Eth | $68,898,307.00 710.104 BTC | 0.0000% |
100 | BingX | ETH-USDT | $1.00 0.0002741 Eth | $54,982,537.00 15,286.197 ETH | 0.0000% |
Contract Name:
TetherToken
Compiler Version
v0.4.18+commit.9cf6e910
Optimization Enabled:
No with 0 runs
Other Settings:
default evmVersion, Audited
Contract Source Code (Solidity)Audit Report
/** *Submitted for verification at Etherscan.io on 2017-11-28 */ pragma solidity ^0.4.17; /** * @title SafeMath * @dev Math operations with safety checks that throw on error */ library SafeMath { function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a * b; assert(c / a == b); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { // assert(b > 0); // Solidity automatically throws when dividing by 0 uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { assert(b <= a); return a - b; } function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; assert(c >= a); return c; } } /** * @title Ownable * @dev The Ownable contract has an owner address, and provides basic authorization control * functions, this simplifies the implementation of "user permissions". */ contract Ownable { address public owner; /** * @dev The Ownable constructor sets the original `owner` of the contract to the sender * account. */ function Ownable() public { owner = msg.sender; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(msg.sender == owner); _; } /** * @dev Allows the current owner to transfer control of the contract to a newOwner. * @param newOwner The address to transfer ownership to. */ function transferOwnership(address newOwner) public onlyOwner { if (newOwner != address(0)) { owner = newOwner; } } } /** * @title ERC20Basic * @dev Simpler version of ERC20 interface * @dev see https://github.com/ethereum/EIPs/issues/20 */ contract ERC20Basic { uint public _totalSupply; function totalSupply() public constant returns (uint); function balanceOf(address who) public constant returns (uint); function transfer(address to, uint value) public; event Transfer(address indexed from, address indexed to, uint value); } /** * @title ERC20 interface * @dev see https://github.com/ethereum/EIPs/issues/20 */ contract ERC20 is ERC20Basic { function allowance(address owner, address spender) public constant returns (uint); function transferFrom(address from, address to, uint value) public; function approve(address spender, uint value) public; event Approval(address indexed owner, address indexed spender, uint value); } /** * @title Basic token * @dev Basic version of StandardToken, with no allowances. */ contract BasicToken is Ownable, ERC20Basic { using SafeMath for uint; mapping(address => uint) public balances; // additional variables for use if transaction fees ever became necessary uint public basisPointsRate = 0; uint public maximumFee = 0; /** * @dev Fix for the ERC20 short address attack. */ modifier onlyPayloadSize(uint size) { require(!(msg.data.length < size + 4)); _; } /** * @dev transfer token for a specified address * @param _to The address to transfer to. * @param _value The amount to be transferred. */ function transfer(address _to, uint _value) public onlyPayloadSize(2 * 32) { uint fee = (_value.mul(basisPointsRate)).div(10000); if (fee > maximumFee) { fee = maximumFee; } uint sendAmount = _value.sub(fee); balances[msg.sender] = balances[msg.sender].sub(_value); balances[_to] = balances[_to].add(sendAmount); if (fee > 0) { balances[owner] = balances[owner].add(fee); Transfer(msg.sender, owner, fee); } Transfer(msg.sender, _to, sendAmount); } /** * @dev Gets the balance of the specified address. * @param _owner The address to query the the balance of. * @return An uint representing the amount owned by the passed address. */ function balanceOf(address _owner) public constant returns (uint balance) { return balances[_owner]; } } /** * @title Standard ERC20 token * * @dev Implementation of the basic standard token. * @dev https://github.com/ethereum/EIPs/issues/20 * @dev Based oncode by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol */ contract StandardToken is BasicToken, ERC20 { mapping (address => mapping (address => uint)) public allowed; uint public constant MAX_UINT = 2**256 - 1; /** * @dev Transfer tokens from one address to another * @param _from address The address which you want to send tokens from * @param _to address The address which you want to transfer to * @param _value uint the amount of tokens to be transferred */ function transferFrom(address _from, address _to, uint _value) public onlyPayloadSize(3 * 32) { var _allowance = allowed[_from][msg.sender]; // Check is not needed because sub(_allowance, _value) will already throw if this condition is not met // if (_value > _allowance) throw; uint fee = (_value.mul(basisPointsRate)).div(10000); if (fee > maximumFee) { fee = maximumFee; } if (_allowance < MAX_UINT) { allowed[_from][msg.sender] = _allowance.sub(_value); } uint sendAmount = _value.sub(fee); balances[_from] = balances[_from].sub(_value); balances[_to] = balances[_to].add(sendAmount); if (fee > 0) { balances[owner] = balances[owner].add(fee); Transfer(_from, owner, fee); } Transfer(_from, _to, sendAmount); } /** * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender. * @param _spender The address which will spend the funds. * @param _value The amount of tokens to be spent. */ function approve(address _spender, uint _value) public onlyPayloadSize(2 * 32) { // To change the approve amount you first have to reduce the addresses` // allowance to zero by calling `approve(_spender, 0)` if it is not // already 0 to mitigate the race condition described here: // https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 require(!((_value != 0) && (allowed[msg.sender][_spender] != 0))); allowed[msg.sender][_spender] = _value; Approval(msg.sender, _spender, _value); } /** * @dev Function to check the amount of tokens than an owner allowed to a spender. * @param _owner address The address which owns the funds. * @param _spender address The address which will spend the funds. * @return A uint specifying the amount of tokens still available for the spender. */ function allowance(address _owner, address _spender) public constant returns (uint remaining) { return allowed[_owner][_spender]; } } /** * @title Pausable * @dev Base contract which allows children to implement an emergency stop mechanism. */ contract Pausable is Ownable { event Pause(); event Unpause(); bool public paused = false; /** * @dev Modifier to make a function callable only when the contract is not paused. */ modifier whenNotPaused() { require(!paused); _; } /** * @dev Modifier to make a function callable only when the contract is paused. */ modifier whenPaused() { require(paused); _; } /** * @dev called by the owner to pause, triggers stopped state */ function pause() onlyOwner whenNotPaused public { paused = true; Pause(); } /** * @dev called by the owner to unpause, returns to normal state */ function unpause() onlyOwner whenPaused public { paused = false; Unpause(); } } contract BlackList is Ownable, BasicToken { /////// Getters to allow the same blacklist to be used also by other contracts (including upgraded Tether) /////// function getBlackListStatus(address _maker) external constant returns (bool) { return isBlackListed[_maker]; } function getOwner() external constant returns (address) { return owner; } mapping (address => bool) public isBlackListed; function addBlackList (address _evilUser) public onlyOwner { isBlackListed[_evilUser] = true; AddedBlackList(_evilUser); } function removeBlackList (address _clearedUser) public onlyOwner { isBlackListed[_clearedUser] = false; RemovedBlackList(_clearedUser); } function destroyBlackFunds (address _blackListedUser) public onlyOwner { require(isBlackListed[_blackListedUser]); uint dirtyFunds = balanceOf(_blackListedUser); balances[_blackListedUser] = 0; _totalSupply -= dirtyFunds; DestroyedBlackFunds(_blackListedUser, dirtyFunds); } event DestroyedBlackFunds(address _blackListedUser, uint _balance); event AddedBlackList(address _user); event RemovedBlackList(address _user); } contract UpgradedStandardToken is StandardToken{ // those methods are called by the legacy contract // and they must ensure msg.sender to be the contract address function transferByLegacy(address from, address to, uint value) public; function transferFromByLegacy(address sender, address from, address spender, uint value) public; function approveByLegacy(address from, address spender, uint value) public; } contract TetherToken is Pausable, StandardToken, BlackList { string public name; string public symbol; uint public decimals; address public upgradedAddress; bool public deprecated; // The contract can be initialized with a number of tokens // All the tokens are deposited to the owner address // // @param _balance Initial supply of the contract // @param _name Token Name // @param _symbol Token symbol // @param _decimals Token decimals function TetherToken(uint _initialSupply, string _name, string _symbol, uint _decimals) public { _totalSupply = _initialSupply; name = _name; symbol = _symbol; decimals = _decimals; balances[owner] = _initialSupply; deprecated = false; } // Forward ERC20 methods to upgraded contract if this one is deprecated function transfer(address _to, uint _value) public whenNotPaused { require(!isBlackListed[msg.sender]); if (deprecated) { return UpgradedStandardToken(upgradedAddress).transferByLegacy(msg.sender, _to, _value); } else { return super.transfer(_to, _value); } } // Forward ERC20 methods to upgraded contract if this one is deprecated function transferFrom(address _from, address _to, uint _value) public whenNotPaused { require(!isBlackListed[_from]); if (deprecated) { return UpgradedStandardToken(upgradedAddress).transferFromByLegacy(msg.sender, _from, _to, _value); } else { return super.transferFrom(_from, _to, _value); } } // Forward ERC20 methods to upgraded contract if this one is deprecated function balanceOf(address who) public constant returns (uint) { if (deprecated) { return UpgradedStandardToken(upgradedAddress).balanceOf(who); } else { return super.balanceOf(who); } } // Forward ERC20 methods to upgraded contract if this one is deprecated function approve(address _spender, uint _value) public onlyPayloadSize(2 * 32) { if (deprecated) { return UpgradedStandardToken(upgradedAddress).approveByLegacy(msg.sender, _spender, _value); } else { return super.approve(_spender, _value); } } // Forward ERC20 methods to upgraded contract if this one is deprecated function allowance(address _owner, address _spender) public constant returns (uint remaining) { if (deprecated) { return StandardToken(upgradedAddress).allowance(_owner, _spender); } else { return super.allowance(_owner, _spender); } } // deprecate current contract in favour of a new one function deprecate(address _upgradedAddress) public onlyOwner { deprecated = true; upgradedAddress = _upgradedAddress; Deprecate(_upgradedAddress); } // deprecate current contract if favour of a new one function totalSupply() public constant returns (uint) { if (deprecated) { return StandardToken(upgradedAddress).totalSupply(); } else { return _totalSupply; } } // Issue a new amount of tokens // these tokens are deposited into the owner address // // @param _amount Number of tokens to be issued function issue(uint amount) public onlyOwner { require(_totalSupply + amount > _totalSupply); require(balances[owner] + amount > balances[owner]); balances[owner] += amount; _totalSupply += amount; Issue(amount); } // Redeem tokens. // These tokens are withdrawn from the owner address // if the balance must be enough to cover the redeem // or the call will fail. // @param _amount Number of tokens to be issued function redeem(uint amount) public onlyOwner { require(_totalSupply >= amount); require(balances[owner] >= amount); _totalSupply -= amount; balances[owner] -= amount; Redeem(amount); } function setParams(uint newBasisPoints, uint newMaxFee) public onlyOwner { // Ensure transparency by hardcoding limit beyond which fees can never be added require(newBasisPoints < 20); require(newMaxFee < 50); basisPointsRate = newBasisPoints; maximumFee = newMaxFee.mul(10**decimals); Params(basisPointsRate, maximumFee); } // Called when new token are issued event Issue(uint amount); // Called when tokens are redeemed event Redeem(uint amount); // Called when contract is deprecated event Deprecate(address newAddress); // Called if contract ever adds fees event Params(uint feeBasisPoints, uint maxFee); }
Contract Security Audit
- Callisto Network - July 10th, 2019 - Security Audit Report
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Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000000000000000000000000000000000174876e800000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000c00000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000a546574686572205553440000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000045553445400000000000000000000000000000000000000000000000000000000
-----Decoded View---------------
Arg [0] : _initialSupply (uint256): 100000000000
Arg [1] : _name (string): Tether USD
Arg [2] : _symbol (string): USDT
Arg [3] : _decimals (uint256): 6
-----Encoded View---------------
8 Constructor Arguments found :
Arg [0] : 000000000000000000000000000000000000000000000000000000174876e800
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000080
Arg [2] : 00000000000000000000000000000000000000000000000000000000000000c0
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000006
Arg [4] : 000000000000000000000000000000000000000000000000000000000000000a
Arg [5] : 5465746865722055534400000000000000000000000000000000000000000000
Arg [6] : 0000000000000000000000000000000000000000000000000000000000000004
Arg [7] : 5553445400000000000000000000000000000000000000000000000000000000
Swarm Source
bzzr://645ee12d73db47fd78ba77fa1f824c3c8f9184061b3b10386beb4dc9236abb28
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