Feature Tip: Add private address tag to any address under My Name Tag !
Overview
Max Total Supply
54,940,840,345.993792 USDT
Holders
6,284,990 ( -0.025%)
Market
Price
$1.00 @ 0.000410 ETH (-0.02%)
Onchain Market Cap
$54,886,339,032.37
Circulating Supply Market Cap
$120,346,109,883.00
Other Info
Token Contract (WITH 6 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | BTC-USDT | $0.9995 0.0004099 Eth | $2,113,925,293.00 31,043.413 BTC | 0.0000% |
2 | Hotcoin | BTC-USDT | $0.9994 0.0004088 Eth | $1,734,178,250.00 25,158.137 BTC | 0.0000% |
3 | Bybit | BTC-USDT | $0.9995 0.0004099 Eth | $1,482,467,149.00 21,749.036 BTC | 0.0000% |
4 | Ourbit | BTC-USDT | $0.999 0.0004097 Eth | $1,101,173,695.00 16,180.953 BTC | 0.0000% |
5 | MEXC | BTC-USDT | $0.9993 0.0004096 Eth | $1,082,952,916.00 15,741.729 BTC | 0.0000% |
6 | Pionex | BTC-USDT | $0.9994 0.0004088 Eth | $1,069,021,901.00 15,690.437 BTC | 0.0000% |
7 | BitMart | BTC-USDT | $0.9995 0.0004099 Eth | $984,408,831.00 14,306.506 BTC | 0.0000% |
8 | OrangeX | BTC-USDT | $0.9993 0.0004093 Eth | $903,702,571.00 13,269.269 BTC | 0.0000% |
9 | Binance | ETH-USDT | $0.9993 0.0004095 Eth | $819,430,202.00 338,648.819 ETH | 0.0000% |
10 | P2B | BTC-USDT | $0.9995 0.0004099 Eth | $766,180,475.00 11,136.316 BTC | 0.0000% |
11 | DigiFinex | BTC-USDT | $0.9994 0.0004099 Eth | $728,882,082.00 10,593.028 BTC | 0.0000% |
12 | WhiteBIT | BTC-USDT | $0.9996 0.0004099 Eth | $656,974,347.00 9,547.202 BTC | 0.0000% |
13 | BitMart | ETH-USDT | $0.9995 0.0004099 Eth | $607,093,201.00 248,881.061 ETH | 0.0000% |
14 | WEEX | ETH-USDT | $0.9989 0.0004092 Eth | $604,226,513.00 249,532.545 ETH | 0.0000% |
15 | Tapbit | ETH-USDT | $0.9998 0.0004092 Eth | $592,204,559.00 244,465.284 ETH | 0.0000% |
16 | OKX | BTC-USDT | $0.9995 0.0004099 Eth | $567,910,925.00 8,344.528 BTC | 0.0000% |
17 | Toobit | ETH-USDT | $0.999 0.0004097 Eth | $549,729,047.00 227,237.163 ETH | 0.0000% |
18 | Hotcoin | ETH-USDT | $0.9994 0.0004099 Eth | $538,901,893.00 221,111.267 ETH | 0.0000% |
19 | Binance | DOGE-USDT | $0.9994 0.0004099 Eth | $532,660,831.00 3,330,186,155.000 DOGE | 0.0208% |
20 | Bitunix | BTC-USDT | $0.9993 0.0004091 Eth | $529,724,866.00 7,687.589 BTC | 0.0000% |
21 | Bybit | ETH-USDT | $0.9995 0.0004099 Eth | $503,195,596.00 207,647.280 ETH | 0.0000% |
22 | AscendEX (BitMax) | BTC-USDT | $0.9996 0.0004099 Eth | $473,038,994.00 6,874.517 BTC | 0.0000% |
23 | LBank | BTC-USDT | $0.9994 0.0004099 Eth | $454,095,323.00 6,598.176 BTC | 0.0000% |
24 | XT.COM | BTC-USDT | $0.9995 0.0004092 Eth | $432,078,065.00 6,343.664 BTC | 0.0000% |
25 | FameEX | ETH-USDT | $0.9988 0.0004088 Eth | $340,003,561.00 140,582.786 ETH | 0.0000% |
26 | MEXC | ETH-USDT | $0.9993 0.0004091 Eth | $325,154,075.00 133,095.533 ETH | 0.0000% |
27 | P2B | ETH-USDT | $0.9995 0.0004099 Eth | $311,983,429.00 127,995.759 ETH | 0.0000% |
28 | HTX | BTC-USDT | $0.9996 0.0004099 Eth | $304,056,754.00 4,460.787 BTC | 0.0000% |
29 | DigiFinex | ETH-USDT | $0.9994 0.0004099 Eth | $289,426,049.00 118,706.628 ETH | 0.0000% |
30 | OrangeX | ETH-USDT | $0.9993 0.0004087 Eth | $278,674,766.00 114,963.792 ETH | 0.0000% |
31 | OKX | ETH-USDT | $0.9996 0.0004099 Eth | $267,785,394.00 110,849.898 ETH | 0.0000% |
32 | AscendEX (BitMax) | ETH-USDT | $0.9996 0.0004099 Eth | $257,984,152.00 105,835.127 ETH | 0.0000% |
33 | BigONE | BTC-USDT | $0.9995 0.0004099 Eth | $253,116,647.00 3,676.693 BTC | 0.0000% |
34 | CoinW | ETH-USDT | $0.9992 0.0004091 Eth | $251,533,570.00 102,972.638 ETH | 0.0000% |
35 | Gate.io | BTC-USDT | $0.9994 0.0004099 Eth | $222,758,106.00 3,276.034 BTC | 0.0000% |
36 | LATOKEN | BTC-USDT | $0.9994 0.0004092 Eth | $220,630,236.00 3,200.582 BTC | 0.0000% |
37 | Biconomy.com | BTC-USDT | $0.9994 0.0004099 Eth | $219,224,742.00 3,216.685 BTC | 0.0000% |
38 | Bitget | BTC-USDT | $0.9995 0.0004099 Eth | $216,429,859.00 3,173.025 BTC | 0.0000% |
39 | OKX | DOGE-USDT | $0.9996 0.0004099 Eth | $192,492,814.00 1,201,820,707.976 DOGE | 0.0075% |
40 | Gate.io | ETH-USDT | $0.9994 0.0004099 Eth | $191,739,300.00 79,441.778 ETH | 0.0000% |
41 | Bitunix | ETH-USDT | $0.9993 0.0004091 Eth | $185,704,087.00 76,015.621 ETH | 0.0000% |
42 | BTSE | BTC-USDT | $0.9991 0.0004097 Eth | $183,189,634.00 2,663.825 BTC | 0.0000% |
43 | Binance | TROY-USDT | $0.9996 0.0004099 Eth | $174,041,065.00 43,054,694,313.000 TROY | 0.2693% |
44 | LBank | ETH-USDT | $0.9996 0.0004099 Eth | $168,952,878.00 69,239.157 ETH | 0.0000% |
45 | Coinstore | BTC-USDT | $0.9994 0.0004099 Eth | $148,812,288.00 2,183.887 BTC | 0.0000% |
46 | KuCoin | BTC-USDT | $0.9994 0.0004099 Eth | $146,085,442.00 2,123.485 BTC | 0.0000% |
47 | Bitget | DOGE-USDT | $0.9995 0.0004099 Eth | $142,958,458.00 899,223,449.599 DOGE | 0.0056% |
48 | FameEX | USDC-USDT | $0.9994 0.0004099 Eth | $137,262,466.00 137,260,674.600 USDC | 0.0009% |
49 | Hotcoin | DOGE-USDT | $0.999 0.0004090 Eth | $136,775,749.00 812,916,275.000 DOGE | 0.0051% |
50 | Gate.io | DOGE-USDT | $0.9995 0.0004099 Eth | $136,351,089.00 850,176,747.280 DOGE | 0.0053% |
51 | Binance | NEIRO-USDT | $0.9994 0.0004091 Eth | $131,558,413.00 101,370,833,695.000 NEIRO | 0.6340% |
52 | Bitget | ETH-USDT | $0.9995 0.0004099 Eth | $129,257,691.00 53,267.505 ETH | 0.0000% |
53 | Bybit | SOL-USDT | $0.9995 0.0004099 Eth | $124,141,126.00 773,935.843 SOL | 0.0000% |
54 | Dex-Trade | BTC-USDT | $0.9995 0.0004099 Eth | $121,891,144.00 1,771.679 BTC | 0.0000% |
55 | KuCoin | ETH-USDT | $0.9994 0.0004099 Eth | $120,122,203.00 49,275.894 ETH | 0.0000% |
56 | Bybit | USDC-USDT | $0.9995 0.0004099 Eth | $119,172,876.00 119,152,510.510 USDC | 0.0007% |
57 | WhiteBIT | DOGE-USDT | $0.9994 0.0004099 Eth | $114,093,666.00 681,107,478.000 DOGE | 0.0043% |
58 | LATOKEN | ETH-USDT | $0.9996 0.0004099 Eth | $112,063,708.00 45,957.219 ETH | 0.0000% |
59 | Coinstore | ETH-USDT | $0.9992 0.0004089 Eth | $109,959,868.00 45,347.100 ETH | 0.0000% |
60 | Binance | XRP-USDT | $0.9993 0.0004095 Eth | $107,428,706.00 211,392,485.000 XRP | 0.0013% |
61 | WhiteBIT | SOL-USDT | $0.999 0.0004097 Eth | $106,622,655.00 657,634.313 SOL | 0.0000% |
62 | Bybit | DOGE-USDT | $0.9995 0.0004099 Eth | $105,063,156.00 659,160,005.700 DOGE | 0.0041% |
63 | Binance | RUNE-USDT | $0.9994 0.0004099 Eth | $103,767,995.00 22,861,721.800 RUNE | 0.0001% |
64 | LBank | SOL-USDT | $0.9994 0.0004099 Eth | $98,085,117.00 604,270.196 SOL | 0.0000% |
65 | OKX | SOL-USDT | $0.9996 0.0004099 Eth | $96,511,051.00 601,152.211 SOL | 0.0000% |
66 | FameEX | DOGE-USDT | $0.9996 0.0004096 Eth | $80,815,694.00 505,337,738.204 DOGE | 0.0032% |
67 | Bitunix | DOGE-USDT | $0.9993 0.0004091 Eth | $76,024,160.00 451,532,394.000 DOGE | 0.0028% |
68 | Bybit | XRP-USDT | $0.9995 0.0004099 Eth | $73,221,462.00 144,354,077.340 XRP | 0.0009% |
69 | BTSE | ETH-USDT | $0.999 0.0004097 Eth | $71,769,109.00 29,442.829 ETH | 0.0000% |
70 | LBank | USDC-USDT | $0.9994 0.0004099 Eth | $70,581,756.00 70,585,613.250 USDC | 0.0004% |
71 | Bitget | SOL-USDT | $0.9995 0.0004099 Eth | $70,559,869.00 440,241.491 SOL | 0.0000% |
72 | HTX | ETH-USDT | $0.9996 0.0004099 Eth | $66,554,902.00 27,438.297 ETH | 0.0000% |
73 | DigiFinex | DOGE-USDT | $0.9994 0.0004099 Eth | $65,048,939.00 388,200,462.090 DOGE | 0.0024% |
74 | Bybit | MNT-USDT | $0.9995 0.0004099 Eth | $64,128,107.00 115,412,516.840 MNT | 0.0007% |
75 | HTX | DOGE-USDT | $0.9996 0.0004099 Eth | $61,692,562.00 386,276,945.816 DOGE | 0.0024% |
76 | Slex | BTC-USDT | $0.999 0.0004097 Eth | $57,433,130.00 843.709 BTC | 0.0000% |
77 | Bitget | BGB-USDT | $0.9995 0.0004099 Eth | $56,393,571.00 50,550,874.066 BGB | 0.0003% |
78 | Coinbase Exchange | BTC-USDT | $0.9995 0.0004099 Eth | $54,176,669.00 787.510 BTC | 0.0000% |
79 | Deepcoin | UXLINK-USDT | $0.9994 0.0004099 Eth | $50,247,109.00 90,700,013.580 UXLINK | 0.0006% |
80 | MEXC | MX-USDT | $0.9992 0.0004088 Eth | $49,770,282.00 18,441,213.510 MX | 0.0001% |
81 | BYDFi | BTC-USDT | $0.9994 0.0004099 Eth | $48,260,604.00 701.522 BTC | 0.0000% |
82 | MEXC | DOGE-USDT | $0.9996 0.0004099 Eth | $46,411,327.00 276,822,658.140 DOGE | 0.0017% |
83 | HTX | PEPE-USDT | $0.9996 0.0004099 Eth | $45,539,456.00 5,623,462,650,622.760 PEPE | 35.1687% |
84 | BVOX | SOL-USDT | $0.9996 0.0004099 Eth | $42,893,318.00 266,924.700 SOL | 0.0000% |
85 | WEEX | DOGE-USDT | $0.999 0.0004097 Eth | $42,259,009.00 264,939,675.311 DOGE | 0.0017% |
86 | Gate.io | PEPE-USDT | $0.9995 0.0004099 Eth | $41,749,112.00 5,172,120,595,049.000 PEPE | 32.3460% |
87 | DigiFinex | SOL-USDT | $0.9994 0.0004099 Eth | $41,040,084.00 252,883.950 SOL | 0.0000% |
88 | Bitget | PEPE-USDT | $0.9995 0.0004099 Eth | $40,801,785.00 5,033,618,731,037.000 PEPE | 31.4799% |
89 | BingX | BTC-USDT | $0.9995 0.0004099 Eth | $40,516,211.00 593.994 BTC | 0.0000% |
90 | Gate.io | SUI-USDT | $0.9995 0.0004099 Eth | $40,374,391.00 21,577,819.140 SUI | 0.0001% |
91 | OKX | SUI-USDT | $0.9996 0.0004099 Eth | $37,685,551.00 20,055,586.553 SUI | 0.0001% |
92 | HashKey Global | BTC-USDT | $0.9987 0.0004096 Eth | $35,826,663.00 525.244 BTC | 0.0000% |
93 | OKX | USDC-USDT | $0.9996 0.0004099 Eth | $32,389,138.00 32,383,033.814 USDC | 0.0002% |
94 | XT.COM | DOGE-USDT | $0.9998 0.0004094 Eth | $32,072,624.00 200,656,395.000 DOGE | 0.0013% |
95 | WhiteBIT | LINK-USDT | $0.9996 0.0004099 Eth | $32,059,924.00 3,042,077.830 LINK | 0.0000% |
96 | Binance | BOME-USDT | $0.9995 0.0004094 Eth | $31,113,128.00 4,345,536,183.000 BOME | 0.0272% |
97 | WhiteBIT | AVAX-USDT | $0.999 0.0004097 Eth | $30,120,963.00 1,293,247.223 AVAX | 0.0000% |
98 | Binance | SAGA-USDT | $0.9996 0.0004099 Eth | $29,830,697.00 17,377,421.000 SAGA | 0.0001% |
99 | KuCoin | SOL-USDT | $0.9994 0.0004099 Eth | $28,217,143.00 173,958.655 SOL | 0.0000% |
100 | BingX | ETH-USDT | $0.9995 0.0004099 Eth | $25,378,454.00 10,463.564 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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