Overview
Max Total Supply
69,929,452,093.657795 USDT
Holders
6,423,985 ( 0.137%)
Market
Price
$1.00 @ 0.000305 ETH (+0.27%)
Onchain Market Cap
$70,069,310,997.85
Circulating Supply Market Cap
$132,996,571,859.00
Other Info
Token Contract (WITH 6 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | BTC-USDT | $0.9999 0.0003043 Eth | $5,629,409,044.00 60,355.254 BTC | 0.0000% |
2 | BVOX | BTC-USDT | $0.9999 0.0003051 Eth | $4,244,921,409.00 45,488.961 BTC | 0.0000% |
3 | Bybit | BTC-USDT | $1.00 0.0003045 Eth | $3,876,173,412.00 41,457.680 BTC | 0.0000% |
4 | CoinW | BTC-USDT | $1.00 0.0003040 Eth | $3,424,272,222.00 37,182.114 BTC | 0.0000% |
5 | Ourbit | BTC-USDT | $1.00 0.0003053 Eth | $3,385,933,532.00 36,284.396 BTC | 0.0000% |
6 | WhiteBIT | BTC-USDT | $1.00 0.0003045 Eth | $2,768,307,077.00 30,104.330 BTC | 0.0000% |
7 | OrangeX | BTC-USDT | $1.00 0.0003041 Eth | $2,444,218,550.00 26,177.850 BTC | 0.0000% |
8 | DigiFinex | BTC-USDT | $1.00 0.0003045 Eth | $2,186,275,914.00 23,774.427 BTC | 0.0000% |
9 | Binance | USDC-USDT | $1.00 0.0003045 Eth | $2,037,958,327.00 2,037,455,885.000 USDC | 0.0054% |
10 | BitMart | BTC-USDT | $1.00 0.0003046 Eth | $1,860,110,615.00 20,193.745 BTC | 0.0000% |
11 | Tapbit | ETH-USDT | $1.00 0.0003046 Eth | $1,840,145,698.00 545,449.594 ETH | 0.0000% |
12 | Toobit | ETH-USDT | $1.00 0.0003049 Eth | $1,697,010,879.00 502,840.747 ETH | 0.0000% |
13 | Binance | DOGE-USDT | $0.9999 0.0003043 Eth | $1,691,941,555.00 4,363,858,761.000 DOGE | 0.0117% |
14 | Bitunix | BTC-USDT | $1.00 0.0003040 Eth | $1,536,036,917.00 16,674.609 BTC | 0.0000% |
15 | Deepcoin | BTC-USDT | $1.00 0.0003045 Eth | $1,402,404,199.00 15,122.497 BTC | 0.0000% |
16 | OKX | BTC-USDT | $0.9999 0.0003043 Eth | $1,326,238,668.00 14,208.809 BTC | 0.0000% |
17 | XT.COM | BTC-USDT | $1.001 0.0003040 Eth | $1,273,243,600.00 13,638.593 BTC | 0.0000% |
18 | Binance | SOL-USDT | $0.9996 0.0003050 Eth | $1,268,462,552.00 5,468,039.398 SOL | 0.0000% |
19 | Binance | XRP-USDT | $0.9999 0.0003043 Eth | $1,118,942,379.00 810,251,016.000 XRP | 0.0022% |
20 | CoinW | ETH-USDT | $1.00 0.0003041 Eth | $1,080,702,755.00 328,187.802 ETH | 0.0000% |
21 | BitMart | ETH-USDT | $1.00 0.0003046 Eth | $1,052,111,595.00 319,189.914 ETH | 0.0000% |
22 | Binance | FDUSD-USDT | $1.001 0.0003047 Eth | $962,447,570.00 964,371,849.000 FDUSD | 0.0026% |
23 | Bybit | ETH-USDT | $1.00 0.0003045 Eth | $939,186,522.00 278,353.177 ETH | 0.0000% |
24 | MEXC | ETH-USDT | $1.00 0.0003041 Eth | $934,335,607.00 284,040.153 ETH | 0.0000% |
25 | AscendEX (BitMax) | BTC-USDT | $1.00 0.0003045 Eth | $924,871,767.00 10,056.532 BTC | 0.0000% |
26 | DigiFinex | ETH-USDT | $1.00 0.0003045 Eth | $891,065,701.00 270,736.935 ETH | 0.0000% |
27 | LBank | BTC-USDT | $1.001 0.0003048 Eth | $875,784,485.00 9,495.699 BTC | 0.0000% |
28 | Ourbit | ETH-USDT | $1.00 0.0003046 Eth | $778,704,312.00 230,603.109 ETH | 0.0000% |
29 | HTX | BTC-USDT | $1.00 0.0003046 Eth | $758,841,354.00 8,128.464 BTC | 0.0000% |
30 | MEXC | BTC-USDT | $1.00 0.0003040 Eth | $757,893,276.00 8,224.053 BTC | 0.0000% |
31 | XT.COM | ETH-USDT | $0.9999 0.0003041 Eth | $725,493,750.00 215,044.721 ETH | 0.0000% |
32 | Hotcoin | ETH-USDT | $1.00 0.0003056 Eth | $718,455,323.00 218,924.363 ETH | 0.0000% |
33 | OKX | ETH-USDT | $1.00 0.0003046 Eth | $673,903,534.00 199,647.530 ETH | 0.0000% |
34 | OKX | DOGE-USDT | $1.00 0.0003046 Eth | $669,344,546.00 1,732,086,574.482 DOGE | 0.0046% |
35 | BigONE | BTC-USDT | $0.9999 0.0003037 Eth | $664,125,194.00 7,224.588 BTC | 0.0000% |
36 | WhiteBIT | ETH-USDT | $0.9999 0.0003037 Eth | $659,836,132.00 200,397.869 ETH | 0.0000% |
37 | Tapbit | BTC-USDT | $1.00 0.0003045 Eth | $638,859,567.00 6,845.051 BTC | 0.0000% |
38 | Bitunix | ETH-USDT | $1.00 0.0003040 Eth | $622,400,041.00 188,908.303 ETH | 0.0000% |
39 | Binance | PEPE-USDT | $0.9999 0.0003043 Eth | $567,916,449.00 30,985,223,685,978.000 PEPE | 82.7798% |
40 | Binance | BNB-USDT | $1.00 0.0003057 Eth | $530,051,324.00 848,000.694 BNB | 0.0000% |
41 | Gate.io | ETH-USDT | $1.00 0.0003045 Eth | $524,470,570.00 154,712.657 ETH | 0.0000% |
42 | Binance | ADA-USDT | $1.001 0.0003051 Eth | $478,463,283.00 511,187,713.300 ADA | 0.0014% |
43 | Coinbase Exchange | USDT-USD | $1.00 0.0003044 Eth | $464,907,697.00 464,824,028.220 USDT | 0.0012% |
44 | BTSE | BTC-USDT | $0.9996 0.0003050 Eth | $460,987,311.00 5,012.406 BTC | 0.0000% |
45 | Gate.io | BTC-USDT | $1.00 0.0003045 Eth | $456,684,282.00 4,886.648 BTC | 0.0000% |
46 | Binance | SUI-USDT | $1.001 0.0003059 Eth | $425,983,891.00 131,190,906.500 SUI | 0.0004% |
47 | LATOKEN | ETH-USDT | $1.00 0.0003045 Eth | $422,171,512.00 128,290.338 ETH | 0.0000% |
48 | Bybit | XRP-USDT | $1.00 0.0003045 Eth | $411,275,739.00 298,530,253.840 XRP | 0.0008% |
49 | Bitget | XRP-USDT | $1.00 0.0003046 Eth | $409,725,569.00 296,624,658.504 XRP | 0.0008% |
50 | Azbit | BTC-USDT | $1.00 0.0003052 Eth | $405,129,733.00 4,328.310 BTC | 0.0000% |
51 | Bitget | DOGE-USDT | $1.00 0.0003046 Eth | $377,821,033.00 974,112,420.315 DOGE | 0.0026% |
52 | LBank | ETH-USDT | $1.001 0.0003040 Eth | $362,964,553.00 110,043.126 ETH | 0.0000% |
53 | Hotcoin | DOGE-USDT | $1.00 0.0003052 Eth | $341,260,880.00 905,698,515.239 DOGE | 0.0024% |
54 | KuCoin | BTC-USDT | $1.00 0.0003046 Eth | $340,596,283.00 3,706.673 BTC | 0.0000% |
55 | Coinstore | BTC-USDT | $1.00 0.0003057 Eth | $330,217,369.00 3,533.762 BTC | 0.0000% |
56 | Bybit | SOL-USDT | $1.00 0.0003045 Eth | $313,710,684.00 1,354,115.806 SOL | 0.0000% |
57 | Bitget | BTC-USDT | $1.00 0.0003046 Eth | $309,471,196.00 3,312.555 BTC | 0.0000% |
58 | Binance | FTM-USDT | $0.9996 0.0003050 Eth | $306,007,776.00 304,223,016.000 FTM | 0.0008% |
59 | Binance | PNUT-USDT | $1.00 0.0003045 Eth | $299,549,603.00 270,275,752.500 PNUT | 0.0007% |
60 | Binance | AVAX-USDT | $1.001 0.0003048 Eth | $288,887,809.00 6,979,951.000 AVAX | 0.0000% |
61 | Bybit | USDC-USDT | $1.00 0.0003045 Eth | $288,390,819.00 288,322,925.080 USDC | 0.0008% |
62 | WhiteBIT | SOL-USDT | $1.00 0.0003045 Eth | $280,390,421.00 1,234,958.152 SOL | 0.0000% |
63 | OKX | SOL-USDT | $1.00 0.0003046 Eth | $270,040,241.00 1,164,567.272 SOL | 0.0000% |
64 | Biconomy.com | ETH-USDT | $0.9999 0.0003043 Eth | $267,452,666.00 79,254.450 ETH | 0.0000% |
65 | MEXC | DOGE-USDT | $0.9998 0.0003037 Eth | $266,961,947.00 708,073,734.760 DOGE | 0.0019% |
66 | Binance | SEI-USDT | $0.9998 0.0003037 Eth | $260,102,569.00 402,714,165.200 SEI | 0.0011% |
67 | Coinstore | ETH-USDT | $1.00 0.0003057 Eth | $253,421,040.00 74,916.617 ETH | 0.0000% |
68 | Bitunix | DOGE-USDT | $1.00 0.0003040 Eth | $245,999,318.00 649,401,568.000 DOGE | 0.0017% |
69 | Deepcoin | SOL-USDT | $1.001 0.0003040 Eth | $237,576,305.00 1,035,905.308 SOL | 0.0000% |
70 | WEEX | DOGE-USDT | $1.00 0.0003046 Eth | $230,247,565.00 611,955,371.019 DOGE | 0.0016% |
71 | Gate.io | XRP-USDT | $1.00 0.0003045 Eth | $213,562,783.00 153,493,668.309 XRP | 0.0004% |
72 | DigiFinex | DOGE-USDT | $1.00 0.0003045 Eth | $211,528,362.00 560,987,541.130 DOGE | 0.0015% |
73 | KuCoin | ETH-USDT | $1.00 0.0003046 Eth | $207,666,823.00 63,119.412 ETH | 0.0000% |
74 | OKX | XRP-USDT | $1.00 0.0003046 Eth | $205,953,035.00 148,819,386.675 XRP | 0.0004% |
75 | BTSE | ETH-USDT | $0.9999 0.0003037 Eth | $204,362,442.00 62,066.431 ETH | 0.0000% |
76 | Bitget | ETH-USDT | $1.00 0.0003046 Eth | $199,120,425.00 58,992.604 ETH | 0.0000% |
77 | HTX | DOGE-USDT | $1.00 0.0003046 Eth | $196,918,714.00 503,543,599.740 DOGE | 0.0013% |
78 | HTX | ETH-USDT | $1.00 0.0003046 Eth | $191,618,354.00 56,869.354 ETH | 0.0000% |
79 | Binance | ARB-USDT | $0.9999 0.0003043 Eth | $188,452,254.00 211,567,913.000 ARB | 0.0006% |
80 | WhiteBIT | XRP-USDT | $0.9999 0.0003037 Eth | $180,824,638.00 132,967,370.510 XRP | 0.0004% |
81 | LBank | SOL-USDT | $1.00 0.0003046 Eth | $179,348,735.00 790,101.066 SOL | 0.0000% |
82 | Deepcoin | XRP-USDT | $0.9996 0.0003050 Eth | $178,940,550.00 132,499,757.079 XRP | 0.0004% |
83 | OrangeX | DOGE-USDT | $0.9998 0.0003049 Eth | $178,145,485.00 460,241,899.000 DOGE | 0.0012% |
84 | Binance | NEAR-USDT | $0.9999 0.0003043 Eth | $174,850,771.00 27,762,869.200 NEAR | 0.0001% |
85 | Binance | NEIRO-USDT | $1.00 0.0003057 Eth | $174,531,407.00 99,416,768,142.000 NEIRO | 0.2656% |
86 | Deepcoin | DOGE-USDT | $1.00 0.0003045 Eth | $171,839,142.00 444,037,859.658 DOGE | 0.0012% |
87 | Binance | DOT-USDT | $0.9999 0.0003043 Eth | $171,185,303.00 21,282,147.080 DOT | 0.0001% |
88 | WhiteBIT | DOGE-USDT | $1.00 0.0003045 Eth | $164,407,346.00 436,376,442.300 DOGE | 0.0012% |
89 | Bitunix | SOL-USDT | $1.00 0.0003040 Eth | $159,929,394.00 702,938.290 SOL | 0.0000% |
90 | Toobit | DOGE-USDT | $0.9999 0.0003045 Eth | $146,740,436.00 378,353,213.000 DOGE | 0.0010% |
91 | Bitget | SUI-USDT | $1.00 0.0003046 Eth | $130,387,946.00 40,031,043.900 SUI | 0.0001% |
92 | WhiteBIT | TRX-USDT | $1.001 0.0003040 Eth | $130,297,124.00 678,790,158.440 TRX | 0.0018% |
93 | WhiteBIT | ADA-USDT | $1.001 0.0003040 Eth | $123,961,500.00 133,503,111.520 ADA | 0.0004% |
94 | Bybit | MNT-USDT | $1.00 0.0003045 Eth | $121,602,946.00 149,328,392.610 MNT | 0.0004% |
95 | BYDFi | BTC-USDT | $0.9999 0.0003037 Eth | $120,574,506.00 1,310.227 BTC | 0.0000% |
96 | OKX | PEPE-USDT | $1.00 0.0003046 Eth | $116,346,584.00 6,324,626,918,265.000 PEPE | 16.8968% |
97 | WhiteBIT | AVAX-USDT | $1.00 0.0003045 Eth | $103,644,187.00 2,510,839.196 AVAX | 0.0000% |
98 | DigiFinex | USDC-USDT | $1.00 0.0003045 Eth | $90,787,409.00 90,789,538.000 USDC | 0.0002% |
99 | Bitunix | USDC-USDT | $1.00 0.0003040 Eth | $88,642,725.00 88,667,161.229 USDC | 0.0002% |
100 | Bitget | USDC-USDT | $1.00 0.0003046 Eth | $68,765,021.00 68,769,917.198 USDC | 0.0002% |
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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