Feature Tip: Add private address tag to any address under My Name Tag !
Overview
Max Total Supply
69,929,452,093.657795 USDT
Holders
6,425,192 ( 0.031%)
Market
Price
$1.00 @ 0.000286 ETH (+0.05%)
Onchain Market Cap
$69,999,381,545.75
Circulating Supply Market Cap
$132,768,807,401.00
Other Info
Token Contract (WITH 6 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | BTC-USDT | $1.00 0.0002857 Eth | $4,161,767,730.00 44,883.653 BTC | 0.0000% |
2 | Pionex | BTC-USDT | $1.00 0.0002857 Eth | $3,516,617,076.00 37,912.519 BTC | 0.0000% |
3 | Bybit | BTC-USDT | $1.00 0.0002859 Eth | $3,317,745,242.00 35,747.448 BTC | 0.0000% |
4 | CoinW | BTC-USDT | $0.9998 0.0002867 Eth | $2,752,913,432.00 29,309.310 BTC | 0.0000% |
5 | Hotcoin | BTC-USDT | $1.00 0.0002857 Eth | $1,812,291,525.00 19,222.427 BTC | 0.0000% |
6 | DigiFinex | BTC-USDT | $1.00 0.0002857 Eth | $1,667,066,643.00 17,686.979 BTC | 0.0000% |
7 | Pionex | ETH-USDT | $1.00 0.0002868 Eth | $1,588,382,910.00 471,873.796 ETH | 0.0000% |
8 | Toobit | ETH-USDT | $1.00 0.0002867 Eth | $1,426,935,728.00 423,632.189 ETH | 0.0000% |
9 | BitMart | BTC-USDT | $1.00 0.0002857 Eth | $1,387,432,855.00 14,718.264 BTC | 0.0000% |
10 | Binance | DOGE-USDT | $1.00 0.0002857 Eth | $1,214,176,275.00 3,138,937,898.000 DOGE | 0.0119% |
11 | Bitunix | BTC-USDT | $0.9998 0.0002867 Eth | $1,138,893,702.00 12,114.966 BTC | 0.0000% |
12 | Deepcoin | BTC-USDT | $0.9999 0.0002867 Eth | $1,048,724,529.00 11,651.989 BTC | 0.0000% |
13 | BVOX | ETH-USDT | $1.00 0.0002867 Eth | $987,341,264.00 293,169.681 ETH | 0.0000% |
14 | OKX | BTC-USDT | $1.00 0.0002857 Eth | $983,144,521.00 10,591.571 BTC | 0.0000% |
15 | AscendEX (BitMax) | BTC-USDT | $1.00 0.0002859 Eth | $954,187,394.00 10,120.132 BTC | 0.0000% |
16 | XT.COM | BTC-USDT | $1.00 0.0002857 Eth | $939,742,505.00 10,134.543 BTC | 0.0000% |
17 | Binance | SOL-USDT | $1.00 0.0002869 Eth | $935,045,841.00 4,042,728.103 SOL | 0.0000% |
18 | BitMart | ETH-USDT | $1.00 0.0002857 Eth | $889,912,376.00 253,856.173 ETH | 0.0000% |
19 | Binance | FDUSD-USDT | $1.00 0.0002857 Eth | $846,718,782.00 848,600,894.000 FDUSD | 0.0032% |
20 | Binance | XRP-USDT | $0.9998 0.0002867 Eth | $825,812,488.00 591,775,847.000 XRP | 0.0022% |
21 | DigiFinex | ETH-USDT | $1.00 0.0002857 Eth | $789,502,614.00 225,977.341 ETH | 0.0000% |
22 | LBank | BTC-USDT | $0.9998 0.0002867 Eth | $757,757,101.00 8,062.232 BTC | 0.0000% |
23 | P2B | ETH-USDT | $1.001 0.0002870 Eth | $749,956,501.00 214,833.581 ETH | 0.0000% |
24 | MEXC | BTC-USDT | $1.00 0.0002857 Eth | $663,689,787.00 7,039.558 BTC | 0.0000% |
25 | HTX | BTC-USDT | $1.00 0.0002857 Eth | $609,921,132.00 6,570.358 BTC | 0.0000% |
26 | LATOKEN | BTC-USDT | $1.00 0.0002868 Eth | $586,317,680.00 6,241.858 BTC | 0.0000% |
27 | Binance | XLM-USDT | $1.00 0.0002870 Eth | $584,227,438.00 1,252,490,544.000 XLM | 0.0047% |
28 | Bitunix | ETH-USDT | $0.9998 0.0002867 Eth | $511,903,795.00 146,829.633 ETH | 0.0000% |
29 | Binance | THE-USDT | $1.00 0.0002857 Eth | $458,112,283.00 209,731,570.000 THE | 0.0008% |
30 | OrangeX | ETH-USDT | $1.00 0.0002866 Eth | $452,068,941.00 134,104.708 ETH | 0.0000% |
31 | Binance | PEPE-USDT | $1.00 0.0002857 Eth | $403,384,733.00 22,236,158,757,555.000 PEPE | 84.2817% |
32 | Binance | BNB-USDT | $1.00 0.0002857 Eth | $385,196,758.00 624,840.473 BNB | 0.0000% |
33 | Binance | ADA-USDT | $1.00 0.0002857 Eth | $378,692,301.00 394,581,170.700 ADA | 0.0015% |
34 | Binance | SUI-USDT | $1.00 0.0002857 Eth | $366,442,167.00 108,008,300.900 SUI | 0.0004% |
35 | Coinstore | BTC-USDT | $1.00 0.0002868 Eth | $355,713,930.00 3,834.130 BTC | 0.0000% |
36 | LATOKEN | ETH-USDT | $1.00 0.0002857 Eth | $346,762,290.00 99,240.598 ETH | 0.0000% |
37 | Bitget | XRP-USDT | $1.00 0.0002857 Eth | $306,917,865.00 220,106,893.544 XRP | 0.0008% |
38 | OKX | MEMEFI-USDT | $1.00 0.0002858 Eth | $294,157,438.00 26,372,788,433.600 MEMEFI | 0.1000% |
39 | Azbit | BTC-USDT | $1.00 0.0002870 Eth | $289,317,372.00 3,126.666 BTC | 0.0000% |
40 | Coinbase Exchange | USDT-USD | $1.00 0.0002857 Eth | $288,587,509.00 288,575,965.810 USDT | 0.0011% |
41 | Bitget | BTC-USDT | $1.00 0.0002857 Eth | $274,289,198.00 2,956.097 BTC | 0.0000% |
42 | Gate.io | ETH-USDT | $1.00 0.0002857 Eth | $252,299,714.00 74,998.286 ETH | 0.0000% |
43 | Bitget | DOGE-USDT | $1.00 0.0002857 Eth | $247,212,291.00 639,151,179.145 DOGE | 0.0024% |
44 | Binance | PNUT-USDT | $1.00 0.0002857 Eth | $246,349,745.00 228,835,862.400 PNUT | 0.0009% |
45 | FameEX | DOGE-USDT | $1.00 0.0002857 Eth | $243,477,673.00 629,487,127.512 DOGE | 0.0024% |
46 | Coinstore | ETH-USDT | $1.00 0.0002857 Eth | $228,697,571.00 67,728.690 ETH | 0.0000% |
47 | BigONE | ETH-USDT | $0.9998 0.0002867 Eth | $223,360,814.00 64,037.166 ETH | 0.0000% |
48 | Bybit | SOL-USDT | $1.00 0.0002859 Eth | $223,060,879.00 965,620.981 SOL | 0.0000% |
49 | Biconomy.com | ETH-USDT | $0.9998 0.0002866 Eth | $214,102,127.00 63,555.049 ETH | 0.0000% |
50 | CoinW | DOGE-USDT | $1.00 0.0002865 Eth | $209,021,208.00 528,449,822.401 DOGE | 0.0020% |
51 | Binance | AVAX-USDT | $1.00 0.0002867 Eth | $208,918,487.00 4,910,912.020 AVAX | 0.0000% |
52 | Binance | TIA-USDT | $1.00 0.0002857 Eth | $202,093,728.00 24,779,562.170 TIA | 0.0001% |
53 | Binance | SEI-USDT | $1.00 0.0002857 Eth | $196,180,591.00 292,024,487.400 SEI | 0.0011% |
54 | Kraken | USDT-USD | $1.00 0.0002857 Eth | $188,416,255.00 188,403,066.806 USDT | 0.0007% |
55 | Bitunix | DOGE-USDT | $0.9998 0.0002867 Eth | $182,596,036.00 462,880,515.000 DOGE | 0.0018% |
56 | Deepcoin | SOL-USDT | $1.00 0.0002866 Eth | $178,104,572.00 772,240.603 SOL | 0.0000% |
57 | XT.COM | XLM-USDT | $1.001 0.0002861 Eth | $177,167,715.00 378,744,450.000 XLM | 0.0014% |
58 | LBank | SOL-USDT | $0.9998 0.0002866 Eth | $176,901,972.00 747,036.621 SOL | 0.0000% |
59 | Bybit | DOGE-USDT | $1.00 0.0002859 Eth | $165,586,592.00 428,328,503.300 DOGE | 0.0016% |
60 | Bitget | ETH-USDT | $1.00 0.0002857 Eth | $162,923,683.00 48,418.501 ETH | 0.0000% |
61 | Fastex | BTC-USDT | $1.00 0.0002870 Eth | $160,775,642.00 1,713.005 BTC | 0.0000% |
62 | Gate.io | DOGE-USDT | $1.00 0.0002857 Eth | $157,731,223.00 407,419,720.310 DOGE | 0.0015% |
63 | Dex-Trade | BTC-USDT | $0.9999 0.0002869 Eth | $155,337,206.00 1,660.023 BTC | 0.0000% |
64 | DigiFinex | DOGE-USDT | $1.00 0.0002857 Eth | $155,198,490.00 393,019,788.560 DOGE | 0.0015% |
65 | Binance | WIF-USDT | $1.00 0.0002857 Eth | $151,763,587.00 50,279,396.510 WIF | 0.0002% |
66 | Gate.io | XRP-USDT | $1.00 0.0002857 Eth | $147,697,233.00 105,670,253.217 XRP | 0.0004% |
67 | Binance | NEAR-USDT | $1.00 0.0002857 Eth | $145,634,044.00 22,597,274.400 NEAR | 0.0001% |
68 | Binance | SAND-USDT | $1.00 0.0002857 Eth | $143,485,901.00 235,740,911.000 SAND | 0.0009% |
69 | LBank | DOGE-USDT | $1.00 0.0002870 Eth | $137,021,771.00 349,744,206.000 DOGE | 0.0013% |
70 | Binance | ARB-USDT | $1.00 0.0002867 Eth | $132,837,836.00 149,611,155.200 ARB | 0.0006% |
71 | Bybit | MNT-USDT | $1.00 0.0002857 Eth | $129,430,026.00 156,752,418.660 MNT | 0.0006% |
72 | Binance | NEIRO-USDT | $1.00 0.0002865 Eth | $124,791,892.00 73,911,084,084.000 NEIRO | 0.2801% |
73 | Bitunix | SOL-USDT | $0.9998 0.0002867 Eth | $121,149,937.00 510,551.020 SOL | 0.0000% |
74 | Bitunix | XRP-USDT | $0.9998 0.0002867 Eth | $113,248,113.00 78,848,591.000 XRP | 0.0003% |
75 | Binance | UNI-USDT | $1.00 0.0002857 Eth | $111,461,216.00 9,629,493.550 UNI | 0.0000% |
76 | BTSE | XRP-USDT | $1.00 0.0002857 Eth | $109,691,240.00 76,241,198.152 XRP | 0.0003% |
77 | Binance | TAO-USDT | $1.00 0.0002857 Eth | $109,319,078.00 198,450.004 TAO | 0.0000% |
78 | WhiteBIT | TRX-USDT | $1.001 0.0002869 Eth | $103,537,426.00 514,303,088.300 TRX | 0.0019% |
79 | Bitget | SOL-USDT | $1.00 0.0002857 Eth | $98,655,769.00 426,697.113 SOL | 0.0000% |
80 | WhiteBIT | ARB-USDT | $1.00 0.0002869 Eth | $98,344,264.00 106,809,347.324 ARB | 0.0004% |
81 | BYDFi | BTC-USDT | $0.9999 0.0002871 Eth | $93,356,846.00 995.118 BTC | 0.0000% |
82 | OKX | XLM-USDT | $1.001 0.0002858 Eth | $92,168,558.00 196,779,304.990 XLM | 0.0007% |
83 | WhiteBIT | NEAR-USDT | $1.00 0.0002867 Eth | $91,515,702.00 13,652,587.830 NEAR | 0.0001% |
84 | WhiteBIT | SUI-USDT | $1.00 0.0002867 Eth | $90,271,455.00 26,614,285.246 SUI | 0.0001% |
85 | Binance | HBAR-USDT | $0.9998 0.0002866 Eth | $83,416,583.00 608,393,470.000 HBAR | 0.0023% |
86 | Binance | AAVE-USDT | $1.00 0.0002870 Eth | $81,498,548.00 439,283.655 AAVE | 0.0000% |
87 | WhiteBIT | AVAX-USDT | $0.9998 0.0002866 Eth | $77,588,730.00 1,813,817.682 AVAX | 0.0000% |
88 | WhiteBIT | XLM-USDT | $1.001 0.0002862 Eth | $77,049,686.00 153,118,190.400 XLM | 0.0006% |
89 | Binance | FIL-USDT | $1.00 0.0002857 Eth | $75,902,914.00 14,054,276.630 FIL | 0.0001% |
90 | DigiFinex | SOL-USDT | $1.00 0.0002857 Eth | $74,683,350.00 314,601.250 SOL | 0.0000% |
91 | WhiteBIT | LINK-USDT | $1.00 0.0002867 Eth | $74,356,748.00 4,142,434.730 LINK | 0.0000% |
92 | Gate.io | PEPE-USDT | $1.00 0.0002857 Eth | $73,202,570.00 4,031,868,042,372.600 PEPE | 15.2820% |
93 | XT.COM | DOGE-USDT | $1.00 0.0002857 Eth | $69,219,293.00 179,012,367.000 DOGE | 0.0007% |
94 | Binance | LTC-USDT | $0.9998 0.0002866 Eth | $68,064,975.00 731,270.087 LTC | 0.0000% |
95 | DigiFinex | ADA-USDT | $1.00 0.0002857 Eth | $63,590,059.00 63,377,062.100 ADA | 0.0002% |
96 | DigiFinex | TRX-USDT | $1.00 0.0002857 Eth | $57,265,699.00 287,712,565.900 TRX | 0.0011% |
97 | DigiFinex | SUI-USDT | $1.00 0.0002857 Eth | $54,569,965.00 16,250,871.600 SUI | 0.0001% |
98 | WhiteBIT | UNI-USDT | $1.001 0.0002869 Eth | $52,291,958.00 4,179,631.950 UNI | 0.0000% |
99 | Bitget | TIA-USDT | $1.00 0.0002859 Eth | $51,526,472.00 6,324,574.100 TIA | 0.0000% |
100 | PointPay | BTC-USDT | $1.001 0.0002869 Eth | $45,878,126.00 494.601 BTC | 0.0000% |
Contract Name:
TetherToken
Compiler Version
v0.4.18+commit.9cf6e910
Optimization Enabled:
No with 0 runs
Other Settings:
default evmVersion, Audited
Contract Source Code (Solidity)Audit Report
/** *Submitted for verification at Etherscan.io on 2017-11-28 */ pragma solidity ^0.4.17; /** * @title SafeMath * @dev Math operations with safety checks that throw on error */ library SafeMath { function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a * b; assert(c / a == b); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { // assert(b > 0); // Solidity automatically throws when dividing by 0 uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { assert(b <= a); return a - b; } function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; assert(c >= a); return c; } } /** * @title Ownable * @dev The Ownable contract has an owner address, and provides basic authorization control * functions, this simplifies the implementation of "user permissions". */ contract Ownable { address public owner; /** * @dev The Ownable constructor sets the original `owner` of the contract to the sender * account. */ function Ownable() public { owner = msg.sender; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(msg.sender == owner); _; } /** * @dev Allows the current owner to transfer control of the contract to a newOwner. * @param newOwner The address to transfer ownership to. */ function transferOwnership(address newOwner) public onlyOwner { if (newOwner != address(0)) { owner = newOwner; } } } /** * @title ERC20Basic * @dev Simpler version of ERC20 interface * @dev see https://github.com/ethereum/EIPs/issues/20 */ contract ERC20Basic { uint public _totalSupply; function totalSupply() public constant returns (uint); function balanceOf(address who) public constant returns (uint); function transfer(address to, uint value) public; event Transfer(address indexed from, address indexed to, uint value); } /** * @title ERC20 interface * @dev see https://github.com/ethereum/EIPs/issues/20 */ contract ERC20 is ERC20Basic { function allowance(address owner, address spender) public constant returns (uint); function transferFrom(address from, address to, uint value) public; function approve(address spender, uint value) public; event Approval(address indexed owner, address indexed spender, uint value); } /** * @title Basic token * @dev Basic version of StandardToken, with no allowances. */ contract BasicToken is Ownable, ERC20Basic { using SafeMath for uint; mapping(address => uint) public balances; // additional variables for use if transaction fees ever became necessary uint public basisPointsRate = 0; uint public maximumFee = 0; /** * @dev Fix for the ERC20 short address attack. */ modifier onlyPayloadSize(uint size) { require(!(msg.data.length < size + 4)); _; } /** * @dev transfer token for a specified address * @param _to The address to transfer to. * @param _value The amount to be transferred. */ function transfer(address _to, uint _value) public onlyPayloadSize(2 * 32) { uint fee = (_value.mul(basisPointsRate)).div(10000); if (fee > maximumFee) { fee = maximumFee; } uint sendAmount = _value.sub(fee); balances[msg.sender] = balances[msg.sender].sub(_value); balances[_to] = balances[_to].add(sendAmount); if (fee > 0) { balances[owner] = balances[owner].add(fee); Transfer(msg.sender, owner, fee); } Transfer(msg.sender, _to, sendAmount); } /** * @dev Gets the balance of the specified address. * @param _owner The address to query the the balance of. * @return An uint representing the amount owned by the passed address. */ function balanceOf(address _owner) public constant returns (uint balance) { return balances[_owner]; } } /** * @title Standard ERC20 token * * @dev Implementation of the basic standard token. * @dev https://github.com/ethereum/EIPs/issues/20 * @dev Based oncode by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol */ contract StandardToken is BasicToken, ERC20 { mapping (address => mapping (address => uint)) public allowed; uint public constant MAX_UINT = 2**256 - 1; /** * @dev Transfer tokens from one address to another * @param _from address The address which you want to send tokens from * @param _to address The address which you want to transfer to * @param _value uint the amount of tokens to be transferred */ function transferFrom(address _from, address _to, uint _value) public onlyPayloadSize(3 * 32) { var _allowance = allowed[_from][msg.sender]; // Check is not needed because sub(_allowance, _value) will already throw if this condition is not met // if (_value > _allowance) throw; uint fee = (_value.mul(basisPointsRate)).div(10000); if (fee > maximumFee) { fee = maximumFee; } if (_allowance < MAX_UINT) { allowed[_from][msg.sender] = _allowance.sub(_value); } uint sendAmount = _value.sub(fee); balances[_from] = balances[_from].sub(_value); balances[_to] = balances[_to].add(sendAmount); if (fee > 0) { balances[owner] = balances[owner].add(fee); Transfer(_from, owner, fee); } Transfer(_from, _to, sendAmount); } /** * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender. * @param _spender The address which will spend the funds. * @param _value The amount of tokens to be spent. */ function approve(address _spender, uint _value) public onlyPayloadSize(2 * 32) { // To change the approve amount you first have to reduce the addresses` // allowance to zero by calling `approve(_spender, 0)` if it is not // already 0 to mitigate the race condition described here: // https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 require(!((_value != 0) && (allowed[msg.sender][_spender] != 0))); allowed[msg.sender][_spender] = _value; Approval(msg.sender, _spender, _value); } /** * @dev Function to check the amount of tokens than an owner allowed to a spender. * @param _owner address The address which owns the funds. * @param _spender address The address which will spend the funds. * @return A uint specifying the amount of tokens still available for the spender. */ function allowance(address _owner, address _spender) public constant returns (uint remaining) { return allowed[_owner][_spender]; } } /** * @title Pausable * @dev Base contract which allows children to implement an emergency stop mechanism. */ contract Pausable is Ownable { event Pause(); event Unpause(); bool public paused = false; /** * @dev Modifier to make a function callable only when the contract is not paused. */ modifier whenNotPaused() { require(!paused); _; } /** * @dev Modifier to make a function callable only when the contract is paused. */ modifier whenPaused() { require(paused); _; } /** * @dev called by the owner to pause, triggers stopped state */ function pause() onlyOwner whenNotPaused public { paused = true; Pause(); } /** * @dev called by the owner to unpause, returns to normal state */ function unpause() onlyOwner whenPaused public { paused = false; Unpause(); } } contract BlackList is Ownable, BasicToken { /////// Getters to allow the same blacklist to be used also by other contracts (including upgraded Tether) /////// function getBlackListStatus(address _maker) external constant returns (bool) { return isBlackListed[_maker]; } function getOwner() external constant returns (address) { return owner; } mapping (address => bool) public isBlackListed; function addBlackList (address _evilUser) public onlyOwner { isBlackListed[_evilUser] = true; AddedBlackList(_evilUser); } function removeBlackList (address _clearedUser) public onlyOwner { isBlackListed[_clearedUser] = false; RemovedBlackList(_clearedUser); } function destroyBlackFunds (address _blackListedUser) public onlyOwner { require(isBlackListed[_blackListedUser]); uint dirtyFunds = balanceOf(_blackListedUser); balances[_blackListedUser] = 0; _totalSupply -= dirtyFunds; DestroyedBlackFunds(_blackListedUser, dirtyFunds); } event DestroyedBlackFunds(address _blackListedUser, uint _balance); event AddedBlackList(address _user); event RemovedBlackList(address _user); } contract UpgradedStandardToken is StandardToken{ // those methods are called by the legacy contract // and they must ensure msg.sender to be the contract address function transferByLegacy(address from, address to, uint value) public; function transferFromByLegacy(address sender, address from, address spender, uint value) public; function approveByLegacy(address from, address spender, uint value) public; } contract TetherToken is Pausable, StandardToken, BlackList { string public name; string public symbol; uint public decimals; address public upgradedAddress; bool public deprecated; // The contract can be initialized with a number of tokens // All the tokens are deposited to the owner address // // @param _balance Initial supply of the contract // @param _name Token Name // @param _symbol Token symbol // @param _decimals Token decimals function TetherToken(uint _initialSupply, string _name, string _symbol, uint _decimals) public { _totalSupply = _initialSupply; name = _name; symbol = _symbol; decimals = _decimals; balances[owner] = _initialSupply; deprecated = false; } // Forward ERC20 methods to upgraded contract if this one is deprecated function transfer(address _to, uint _value) public whenNotPaused { require(!isBlackListed[msg.sender]); if (deprecated) { return UpgradedStandardToken(upgradedAddress).transferByLegacy(msg.sender, _to, _value); } else { return super.transfer(_to, _value); } } // Forward ERC20 methods to upgraded contract if this one is deprecated function transferFrom(address _from, address _to, uint _value) public whenNotPaused { require(!isBlackListed[_from]); if (deprecated) { return UpgradedStandardToken(upgradedAddress).transferFromByLegacy(msg.sender, _from, _to, _value); } else { return super.transferFrom(_from, _to, _value); } } // Forward ERC20 methods to upgraded contract if this one is deprecated function balanceOf(address who) public constant returns (uint) { if (deprecated) { return UpgradedStandardToken(upgradedAddress).balanceOf(who); } else { return super.balanceOf(who); } } // Forward ERC20 methods to upgraded contract if this one is deprecated function approve(address _spender, uint _value) public onlyPayloadSize(2 * 32) { if (deprecated) { return UpgradedStandardToken(upgradedAddress).approveByLegacy(msg.sender, _spender, _value); } else { return super.approve(_spender, _value); } } // Forward ERC20 methods to upgraded contract if this one is deprecated function allowance(address _owner, address _spender) public constant returns (uint remaining) { if (deprecated) { return StandardToken(upgradedAddress).allowance(_owner, _spender); } else { return super.allowance(_owner, _spender); } } // deprecate current contract in favour of a new one function deprecate(address _upgradedAddress) public onlyOwner { deprecated = true; upgradedAddress = _upgradedAddress; Deprecate(_upgradedAddress); } // deprecate current contract if favour of a new one function totalSupply() public constant returns (uint) { if (deprecated) { return StandardToken(upgradedAddress).totalSupply(); } else { return _totalSupply; } } // Issue a new amount of tokens // these tokens are deposited into the owner address // // @param _amount Number of tokens to be issued function issue(uint amount) public onlyOwner { require(_totalSupply + amount > _totalSupply); require(balances[owner] + amount > balances[owner]); balances[owner] += amount; _totalSupply += amount; Issue(amount); } // Redeem tokens. // These tokens are withdrawn from the owner address // if the balance must be enough to cover the redeem // or the call will fail. // @param _amount Number of tokens to be issued function redeem(uint amount) public onlyOwner { require(_totalSupply >= amount); require(balances[owner] >= amount); _totalSupply -= amount; balances[owner] -= amount; Redeem(amount); } function setParams(uint newBasisPoints, uint newMaxFee) public onlyOwner { // Ensure transparency by hardcoding limit beyond which fees can never be added require(newBasisPoints < 20); require(newMaxFee < 50); basisPointsRate = newBasisPoints; maximumFee = newMaxFee.mul(10**decimals); Params(basisPointsRate, maximumFee); } // Called when new token are issued event Issue(uint amount); // Called when tokens are redeemed event Redeem(uint amount); // Called when contract is deprecated event Deprecate(address newAddress); // Called if contract ever adds fees event Params(uint feeBasisPoints, uint maxFee); }
Contract Security Audit
- Callisto Network - July 10th, 2019 - Security Audit Report
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Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000000000000000000000000000000000174876e800000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000c00000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000a546574686572205553440000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000045553445400000000000000000000000000000000000000000000000000000000
-----Decoded View---------------
Arg [0] : _initialSupply (uint256): 100000000000
Arg [1] : _name (string): Tether USD
Arg [2] : _symbol (string): USDT
Arg [3] : _decimals (uint256): 6
-----Encoded View---------------
8 Constructor Arguments found :
Arg [0] : 000000000000000000000000000000000000000000000000000000174876e800
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000080
Arg [2] : 00000000000000000000000000000000000000000000000000000000000000c0
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000006
Arg [4] : 000000000000000000000000000000000000000000000000000000000000000a
Arg [5] : 5465746865722055534400000000000000000000000000000000000000000000
Arg [6] : 0000000000000000000000000000000000000000000000000000000000000004
Arg [7] : 5553445400000000000000000000000000000000000000000000000000000000
Swarm Source
bzzr://645ee12d73db47fd78ba77fa1f824c3c8f9184061b3b10386beb4dc9236abb28
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