Overview
Max Total Supply
54,940,840,345.993792 USDT
Holders
6,277,280 ( -0.014%)
Market
Price
$1.00 @ 0.000399 ETH (-0.08%)
Onchain Market Cap
$54,897,107,437.08
Circulating Supply Market Cap
$120,462,901,234.00
Other Info
Token Contract (WITH 6 Decimals)
Balance
0 USDTValue
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | BTC-USDT | $0.9991 0.0003986 Eth | $2,446,779,099.00 34,757.968 BTC | 0.0000% |
2 | WEEX | BTC-USDT | $0.999 0.0003995 Eth | $1,937,111,676.00 27,511.561 BTC | 0.0000% |
3 | Hotcoin | BTC-USDT | $0.9991 0.0003988 Eth | $1,933,573,823.00 27,826.613 BTC | 0.0000% |
4 | CoinW | BTC-USDT | $0.9991 0.0003986 Eth | $1,785,231,553.00 25,699.209 BTC | 0.0000% |
5 | Ourbit | BTC-USDT | $0.9991 0.0003986 Eth | $1,398,639,149.00 19,854.429 BTC | 0.0000% |
6 | Toobit | BTC-USDT | $0.999 0.0003989 Eth | $1,346,544,962.00 19,129.112 BTC | 0.0000% |
7 | Bybit | BTC-USDT | $0.9991 0.0003986 Eth | $1,236,933,899.00 17,564.301 BTC | 0.0000% |
8 | OrangeX | BTC-USDT | $0.9994 0.0003994 Eth | $1,189,266,734.00 16,883.100 BTC | 0.0000% |
9 | Binance | ETH-USDT | $0.9995 0.0003988 Eth | $1,171,992,879.00 460,800.185 ETH | 0.0000% |
10 | Pionex | BTC-USDT | $0.9991 0.0003988 Eth | $1,119,122,418.00 15,899.982 BTC | 0.0000% |
11 | DigiFinex | BTC-USDT | $0.9991 0.0003986 Eth | $899,073,481.00 12,942.008 BTC | 0.0000% |
12 | Tapbit | ETH-USDT | $0.9991 0.0003988 Eth | $852,843,772.00 335,448.007 ETH | 0.0000% |
13 | OKX | BTC-USDT | $0.9991 0.0003986 Eth | $849,261,035.00 12,041.837 BTC | 0.0000% |
14 | Toobit | ETH-USDT | $0.999 0.0003989 Eth | $781,906,074.00 307,562.424 ETH | 0.0000% |
15 | Hotcoin | ETH-USDT | $0.9991 0.0003986 Eth | $756,161,836.00 301,703.718 ETH | 0.0000% |
16 | WhiteBIT | BTC-USDT | $0.9991 0.0003994 Eth | $748,373,008.00 10,787.732 BTC | 0.0000% |
17 | WEEX | ETH-USDT | $0.9993 0.0003991 Eth | $747,674,204.00 294,205.562 ETH | 0.0000% |
18 | Bitunix | BTC-USDT | $0.9989 0.0003991 Eth | $521,822,800.00 7,516.991 BTC | 0.0000% |
19 | XT.COM | BTC-USDT | $0.999 0.0003989 Eth | $507,300,054.00 7,205.901 BTC | 0.0000% |
20 | Binance | SOL-USDT | $0.9995 0.0003988 Eth | $490,572,676.00 2,894,703.665 SOL | 0.0000% |
21 | FameEX | ETH-USDT | $0.999 0.0003990 Eth | $490,359,174.00 192,860.662 ETH | 0.0000% |
22 | BVOX | ETH-USDT | $0.999 0.0003989 Eth | $485,724,423.00 190,995.808 ETH | 0.0000% |
23 | OrangeX | ETH-USDT | $0.9991 0.0003993 Eth | $464,262,402.00 182,523.086 ETH | 0.0000% |
24 | AscendEX (BitMax) | BTC-USDT | $0.9991 0.0003988 Eth | $462,450,757.00 6,655.027 BTC | 0.0000% |
25 | Bybit | ETH-USDT | $0.9991 0.0003986 Eth | $454,760,805.00 178,916.726 ETH | 0.0000% |
26 | DigiFinex | ETH-USDT | $0.9991 0.0003986 Eth | $412,687,892.00 164,624.874 ETH | 0.0000% |
27 | OKX | ETH-USDT | $0.9991 0.0003986 Eth | $408,618,917.00 160,527.894 ETH | 0.0000% |
28 | Pionex | ETH-USDT | $0.9991 0.0003995 Eth | $403,010,870.00 158,434.434 ETH | 0.0000% |
29 | HTX | BTC-USDT | $0.9991 0.0003986 Eth | $388,540,734.00 5,514.028 BTC | 0.0000% |
30 | Binance | DOGE-USDT | $0.9989 0.0003995 Eth | $361,895,200.00 2,224,149,398.000 DOGE | 0.0183% |
31 | P2B | ETH-USDT | $0.999 0.0003991 Eth | $359,372,787.00 143,512.912 ETH | 0.0000% |
32 | Gate.io | ETH-USDT | $0.9995 0.0003988 Eth | $357,701,700.00 140,770.450 ETH | 0.0000% |
33 | WhiteBIT | ETH-USDT | $0.9991 0.0003986 Eth | $351,601,633.00 140,253.668 ETH | 0.0000% |
34 | XT.COM | ETH-USDT | $0.9991 0.0003994 Eth | $325,596,525.00 128,033.551 ETH | 0.0000% |
35 | Bitget | BTC-USDT | $0.9991 0.0003986 Eth | $258,122,404.00 3,665.644 BTC | 0.0000% |
36 | AscendEX (BitMax) | ETH-USDT | $0.9991 0.0003988 Eth | $254,247,978.00 101,417.298 ETH | 0.0000% |
37 | LATOKEN | BTC-USDT | $0.9994 0.0003994 Eth | $248,037,207.00 3,575.112 BTC | 0.0000% |
38 | Biconomy.com | BTC-USDT | $0.9991 0.0003986 Eth | $236,539,448.00 3,360.347 BTC | 0.0000% |
39 | Gate.io | BTC-USDT | $0.9991 0.0003986 Eth | $231,871,206.00 3,290.787 BTC | 0.0000% |
40 | Bitunix | ETH-USDT | $0.9989 0.0003991 Eth | $228,820,918.00 91,429.265 ETH | 0.0000% |
41 | BTSE | BTC-USDT | $0.9991 0.0003995 Eth | $225,116,719.00 3,246.211 BTC | 0.0000% |
42 | Ourbit | ETH-USDT | $0.9991 0.0003989 Eth | $197,859,898.00 77,817.606 ETH | 0.0000% |
43 | KuCoin | BTC-USDT | $0.9991 0.0003986 Eth | $180,118,864.00 2,592.581 BTC | 0.0000% |
44 | LBank | ETH-USDT | $0.999 0.0003991 Eth | $178,633,407.00 71,361.290 ETH | 0.0000% |
45 | Coinstore | BTC-USDT | $0.9991 0.0003986 Eth | $168,386,197.00 2,390.294 BTC | 0.0000% |
46 | Binance | NEIRO-USDT | $0.9991 0.0003993 Eth | $166,407,008.00 104,432,711,154.000 NEIRO | 0.8607% |
47 | OKX | DOGE-USDT | $0.9991 0.0003986 Eth | $162,672,052.00 1,001,087,433.483 DOGE | 0.0083% |
48 | Binance | BNB-USDT | $0.999 0.0003993 Eth | $158,976,866.00 275,183.956 BNB | 0.0000% |
49 | Coinstore | ETH-USDT | $0.9992 0.0003989 Eth | $158,215,676.00 62,175.211 ETH | 0.0000% |
50 | LATOKEN | ETH-USDT | $0.9991 0.0003989 Eth | $156,088,729.00 62,314.674 ETH | 0.0000% |
51 | KuCoin | ETH-USDT | $0.9991 0.0003986 Eth | $151,721,176.00 60,522.265 ETH | 0.0000% |
52 | Biconomy.com | ETH-USDT | $0.999 0.0003990 Eth | $149,525,810.00 58,811.537 ETH | 0.0000% |
53 | Binance | SUI-USDT | $0.9991 0.0003993 Eth | $147,845,922.00 74,541,795.500 SUI | 0.0006% |
54 | Bitget | ETH-USDT | $0.9991 0.0003986 Eth | $139,431,215.00 54,948.783 ETH | 0.0000% |
55 | Bybit | SOL-USDT | $0.9991 0.0003986 Eth | $130,176,596.00 767,877.976 SOL | 0.0000% |
56 | Dex-Trade | BTC-USDT | $0.9991 0.0003986 Eth | $127,304,846.00 1,832.510 BTC | 0.0000% |
57 | Binance | XRP-USDT | $0.9991 0.0003994 Eth | $125,689,255.00 245,391,772.000 XRP | 0.0020% |
58 | FameEX | SOL-USDT | $0.999 0.0003990 Eth | $121,472,043.00 717,580.157 SOL | 0.0000% |
59 | BigONE | ETH-USDT | $0.9992 0.0003994 Eth | $113,189,061.00 45,230.037 ETH | 0.0000% |
60 | OKX | SOL-USDT | $0.9991 0.0003986 Eth | $111,903,567.00 659,884.992 SOL | 0.0000% |
61 | Binance | WIF-USDT | $0.9994 0.0003994 Eth | $108,494,867.00 44,977,677.590 WIF | 0.0004% |
62 | BTSE | ETH-USDT | $0.9992 0.0003989 Eth | $100,221,037.00 39,988.276 ETH | 0.0000% |
63 | WhiteBIT | SOL-USDT | $0.9991 0.0003986 Eth | $100,016,858.00 600,136.452 SOL | 0.0000% |
64 | Gate.io | DOGE-USDT | $0.9995 0.0003988 Eth | $91,702,530.00 562,943,009.526 DOGE | 0.0046% |
65 | Hotcoin | DOGE-USDT | $0.9991 0.0003988 Eth | $89,519,599.00 563,460,021.220 DOGE | 0.0046% |
66 | Bitget | DOGE-USDT | $0.9991 0.0003986 Eth | $88,511,245.00 543,711,412.949 DOGE | 0.0045% |
67 | Coinbase Exchange | USDT-USDC | $0.999 0.0003989 Eth | $78,565,879.00 78,645,597.570 USDT | 0.0006% |
68 | WhiteBIT | DOGE-USDT | $0.9991 0.0003986 Eth | $77,151,834.00 486,353,549.000 DOGE | 0.0040% |
69 | Coinbase Exchange | BTC-USDT | $0.9991 0.0003986 Eth | $75,498,627.00 1,086.575 BTC | 0.0000% |
70 | Bybit | XRP-USDT | $0.9991 0.0003986 Eth | $71,213,694.00 139,187,599.370 XRP | 0.0011% |
71 | Bybit | MNT-USDT | $0.9991 0.0003986 Eth | $69,897,784.00 117,670,739.370 MNT | 0.0010% |
72 | Bybit | DOGE-USDT | $0.9991 0.0003986 Eth | $69,047,150.00 424,082,686.100 DOGE | 0.0035% |
73 | HTX | ETH-USDT | $0.9991 0.0003986 Eth | $67,276,291.00 26,423.598 ETH | 0.0000% |
74 | Slex | BTC-USDT | $0.9991 0.0003989 Eth | $66,525,156.00 944.850 BTC | 0.0000% |
75 | Bitget | SOL-USDT | $0.9991 0.0003986 Eth | $66,307,867.00 391,528.060 SOL | 0.0000% |
76 | BingX | BTC-USDT | $0.9991 0.0003986 Eth | $62,700,372.00 890.394 BTC | 0.0000% |
77 | Bitget | BGB-USDT | $0.9991 0.0003986 Eth | $61,989,493.00 54,762,840.234 BGB | 0.0005% |
78 | Gate.io | KAS-USDT | $0.9991 0.0003988 Eth | $61,014,099.00 528,773,609.860 KAS | 0.0044% |
79 | HTX | DOGE-USDT | $0.9991 0.0003986 Eth | $59,193,088.00 364,287,601.964 DOGE | 0.0030% |
80 | FameEX | DOGE-USDT | $0.9991 0.0003988 Eth | $53,053,340.00 326,794,294.040 DOGE | 0.0027% |
81 | DigiFinex | DOGE-USDT | $0.9991 0.0003986 Eth | $51,595,555.00 325,289,333.980 DOGE | 0.0027% |
82 | HTX | PEPE-USDT | $0.9995 0.0003988 Eth | $46,381,075.00 5,063,311,816,174.750 PEPE | 41.7287% |
83 | Bybit | APEX-USDT | $0.9991 0.0003986 Eth | $45,382,161.00 32,656,719.760 APEX | 0.0003% |
84 | Bitunix | SOL-USDT | $0.9989 0.0003991 Eth | $43,952,798.00 264,249.710 SOL | 0.0000% |
85 | Gate.io | SUI-USDT | $0.9991 0.0003988 Eth | $43,863,835.00 22,109,333.300 SUI | 0.0002% |
86 | PointPay | BTC-USDT | $0.9991 0.0003986 Eth | $43,570,319.00 619.016 BTC | 0.0000% |
87 | Binance | BOME-USDT | $0.9995 0.0003988 Eth | $43,106,521.00 5,276,866,100.000 BOME | 0.0435% |
88 | Bitunix | DOGE-USDT | $0.9989 0.0003991 Eth | $42,023,173.00 264,931,748.000 DOGE | 0.0022% |
89 | MEXC | SUI-USDT | $0.9991 0.0003995 Eth | $39,266,278.00 20,341,338.540 SUI | 0.0002% |
90 | BTSE | DOGE-USDT | $0.9992 0.0003989 Eth | $39,007,240.00 245,050,358.736 DOGE | 0.0020% |
91 | DigiFinex | SOL-USDT | $0.9991 0.0003986 Eth | $38,469,496.00 230,871.800 SOL | 0.0000% |
92 | BingX | ETH-USDT | $0.9991 0.0003986 Eth | $37,566,882.00 14,773.768 ETH | 0.0000% |
93 | Gate.io | ETHFI-USDT | $0.9995 0.0003988 Eth | $32,599,594.00 22,629,544.210 ETHFI | 0.0002% |
94 | OKX | PEPE-USDT | $0.9995 0.0003988 Eth | $31,952,912.00 3,480,258,737,452.000 PEPE | 28.6822% |
95 | Bybit | PEPE-USDT | $0.9991 0.0003986 Eth | $31,810,145.00 3,471,861,695,623.000 PEPE | 28.6130% |
96 | HashKey Global | BTC-USDT | $0.9985 0.0003992 Eth | $30,644,792.00 436.085 BTC | 0.0000% |
97 | WhiteBIT | LINK-USDT | $0.9991 0.0003986 Eth | $29,924,802.00 2,637,782.270 LINK | 0.0000% |
98 | WhiteBIT | AVAX-USDT | $0.9993 0.0003991 Eth | $25,208,447.00 1,012,233.685 AVAX | 0.0000% |
99 | KuCoin | SOL-USDT | $0.9991 0.0003986 Eth | $25,165,220.00 151,023.800 SOL | 0.0000% |
100 | Kraken | BTC-USDT | $0.9999 0.0003989 Eth | $22,921,251.00 329.884 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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