Overview
Max Total Supply
54,940,840,345.993792 USDT
Holders
6,277,215 ( -0.021%)
Market
Price
$1.00 @ 0.000399 ETH (-0.12%)
Onchain Market Cap
$54,876,724,385.31
Circulating Supply Market Cap
$120,453,429,643.00
Other Info
Token Contract (WITH 6 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | BTC-USDT | $0.9991 0.0003994 Eth | $2,450,176,251.00 34,800.548 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 0.0003994 Eth | $1,931,853,130.00 27,859.191 BTC | 0.0000% |
4 | CoinW | BTC-USDT | $0.9983 0.0003991 Eth | $1,785,039,969.00 25,760.540 BTC | 0.0000% |
5 | BVOX | BTC-USDT | $0.999 0.0003990 Eth | $1,404,734,083.00 19,975.838 BTC | 0.0000% |
6 | Binance | USDC-USDT | $0.999 0.0003994 Eth | $1,378,514,310.00 1,378,980,955.000 USDC | 0.0265% |
7 | Toobit | BTC-USDT | $0.9991 0.0003995 Eth | $1,349,245,385.00 19,162.159 BTC | 0.0000% |
8 | Bybit | BTC-USDT | $0.999 0.0003994 Eth | $1,236,668,229.00 17,558.953 BTC | 0.0000% |
9 | OrangeX | BTC-USDT | $0.9991 0.0003995 Eth | $1,190,782,415.00 16,908.227 BTC | 0.0000% |
10 | Binance | ETH-USDT | $0.9992 0.0003990 Eth | $1,172,936,878.00 461,120.551 ETH | 0.0000% |
11 | Pionex | BTC-USDT | $0.9987 0.0003997 Eth | $1,122,107,925.00 15,942.052 BTC | 0.0000% |
12 | DigiFinex | BTC-USDT | $0.9991 0.0003994 Eth | $897,430,115.00 12,942.394 BTC | 0.0000% |
13 | OKX | BTC-USDT | $0.9991 0.0003994 Eth | $848,515,569.00 12,029.155 BTC | 0.0000% |
14 | Toobit | ETH-USDT | $0.9991 0.0003991 Eth | $783,202,856.00 307,933.252 ETH | 0.0000% |
15 | WhiteBIT | BTC-USDT | $0.9991 0.0003994 Eth | $748,373,008.00 10,787.732 BTC | 0.0000% |
16 | MEXC | BTC-USDT | $0.9991 0.0003991 Eth | $670,584,641.00 9,660.420 BTC | 0.0000% |
17 | BitMart | BTC-USDT | $0.9991 0.0003995 Eth | $599,007,918.00 8,634.776 BTC | 0.0000% |
18 | XT.COM | BTC-USDT | $0.9989 0.0003992 Eth | $508,538,601.00 7,222.217 BTC | 0.0000% |
19 | BVOX | ETH-USDT | $0.9991 0.0003995 Eth | $487,844,192.00 191,683.023 ETH | 0.0000% |
20 | OrangeX | ETH-USDT | $0.9991 0.0003995 Eth | $464,579,889.00 182,630.543 ETH | 0.0000% |
21 | AscendEX (BitMax) | BTC-USDT | $0.9991 0.0003994 Eth | $461,652,866.00 6,656.179 BTC | 0.0000% |
22 | Bybit | ETH-USDT | $0.999 0.0003994 Eth | $455,420,878.00 179,124.517 ETH | 0.0000% |
23 | LBank | BTC-USDT | $0.9991 0.0003994 Eth | $444,902,835.00 6,411.749 BTC | 0.0000% |
24 | DigiFinex | ETH-USDT | $0.9991 0.0003994 Eth | $411,913,044.00 164,685.628 ETH | 0.0000% |
25 | OKX | ETH-USDT | $0.9991 0.0003994 Eth | $408,608,395.00 160,499.600 ETH | 0.0000% |
26 | Pionex | ETH-USDT | $0.9991 0.0003995 Eth | $403,010,870.00 158,434.434 ETH | 0.0000% |
27 | HTX | BTC-USDT | $0.9991 0.0003994 Eth | $388,730,670.00 5,515.555 BTC | 0.0000% |
28 | Binance | DOGE-USDT | $0.9989 0.0003995 Eth | $361,895,200.00 2,224,149,398.000 DOGE | 0.0427% |
29 | BitMart | ETH-USDT | $0.9991 0.0003995 Eth | $360,817,680.00 144,247.375 ETH | 0.0000% |
30 | P2B | ETH-USDT | $0.999 0.0003991 Eth | $359,372,787.00 143,512.912 ETH | 0.0000% |
31 | Gate.io | ETH-USDT | $0.9991 0.0003994 Eth | $357,354,329.00 140,674.868 ETH | 0.0000% |
32 | MEXC | ETH-USDT | $0.9989 0.0003995 Eth | $326,834,207.00 130,677.801 ETH | 0.0000% |
33 | XT.COM | ETH-USDT | $0.9994 0.0003993 Eth | $326,331,694.00 128,241.894 ETH | 0.0000% |
34 | Bitget | BTC-USDT | $0.999 0.0003994 Eth | $258,040,820.00 3,663.087 BTC | 0.0000% |
35 | AscendEX (BitMax) | ETH-USDT | $0.9991 0.0003994 Eth | $253,258,558.00 101,249.481 ETH | 0.0000% |
36 | LATOKEN | BTC-USDT | $0.9991 0.0003994 Eth | $248,383,420.00 3,581.105 BTC | 0.0000% |
37 | Biconomy.com | BTC-USDT | $0.9991 0.0003994 Eth | $236,797,716.00 3,362.135 BTC | 0.0000% |
38 | Gate.io | BTC-USDT | $0.9991 0.0003994 Eth | $231,777,198.00 3,288.824 BTC | 0.0000% |
39 | Bitunix | ETH-USDT | $0.999 0.0003994 Eth | $228,868,441.00 91,515.242 ETH | 0.0000% |
40 | BTSE | BTC-USDT | $0.9991 0.0003995 Eth | $224,965,082.00 3,242.499 BTC | 0.0000% |
41 | Bybit | USDC-USDT | $0.999 0.0003994 Eth | $199,579,010.00 199,613,036.140 USDC | 0.0038% |
42 | Ourbit | ETH-USDT | $0.999 0.0003990 Eth | $198,541,881.00 78,047.006 ETH | 0.0000% |
43 | KuCoin | BTC-USDT | $0.9991 0.0003994 Eth | $179,364,111.00 2,586.624 BTC | 0.0000% |
44 | LBank | ETH-USDT | $0.999 0.0003991 Eth | $178,633,407.00 71,361.290 ETH | 0.0000% |
45 | Binance | NEIRO-USDT | $0.999 0.0003994 Eth | $166,174,171.00 104,285,581,870.000 NEIRO | 2.0023% |
46 | OKX | DOGE-USDT | $0.9991 0.0003994 Eth | $163,341,265.00 1,004,744,306.328 DOGE | 0.0193% |
47 | Binance | BNB-USDT | $0.9991 0.0003994 Eth | $159,549,188.00 276,129.697 BNB | 0.0000% |
48 | Coinstore | ETH-USDT | $0.999 0.0003994 Eth | $158,812,377.00 62,397.271 ETH | 0.0000% |
49 | KuCoin | ETH-USDT | $0.9991 0.0003994 Eth | $151,225,940.00 60,458.859 ETH | 0.0000% |
50 | Biconomy.com | ETH-USDT | $0.9991 0.0003994 Eth | $149,611,313.00 58,824.033 ETH | 0.0000% |
51 | Binance | SUI-USDT | $0.9989 0.0003992 Eth | $148,554,708.00 74,881,954.700 SUI | 0.0014% |
52 | Bitget | ETH-USDT | $0.999 0.0003994 Eth | $139,413,319.00 54,918.002 ETH | 0.0000% |
53 | Bybit | SOL-USDT | $0.999 0.0003994 Eth | $130,455,755.00 769,381.830 SOL | 0.0000% |
54 | Dex-Trade | BTC-USDT | $0.9991 0.0003982 Eth | $127,551,461.00 1,838.440 BTC | 0.0000% |
55 | Binance | XRP-USDT | $0.9991 0.0003994 Eth | $125,689,255.00 245,391,772.000 XRP | 0.0047% |
56 | FameEX | SOL-USDT | $0.999 0.0003993 Eth | $120,985,359.00 714,470.602 SOL | 0.0000% |
57 | BigONE | ETH-USDT | $0.9991 0.0003994 Eth | $113,219,579.00 45,251.314 ETH | 0.0000% |
58 | OKX | SOL-USDT | $0.9991 0.0003994 Eth | $111,778,076.00 658,879.738 SOL | 0.0000% |
59 | Binance | WIF-USDT | $0.999 0.0003994 Eth | $108,398,672.00 44,945,374.340 WIF | 0.0009% |
60 | BTSE | ETH-USDT | $0.999 0.0003990 Eth | $99,337,068.00 39,670.149 ETH | 0.0000% |
61 | Gate.io | DOGE-USDT | $0.9991 0.0003994 Eth | $91,916,764.00 564,331,239.336 DOGE | 0.0108% |
62 | Hotcoin | DOGE-USDT | $0.9991 0.0003994 Eth | $89,370,425.00 564,395,357.220 DOGE | 0.0108% |
63 | Bitget | DOGE-USDT | $0.999 0.0003994 Eth | $88,312,804.00 542,241,277.776 DOGE | 0.0104% |
64 | WhiteBIT | DOGE-USDT | $0.9991 0.0003994 Eth | $77,349,603.00 487,809,812.000 DOGE | 0.0094% |
65 | Coinbase Exchange | BTC-USDT | $0.9991 0.0003994 Eth | $75,212,280.00 1,084.594 BTC | 0.0000% |
66 | Bybit | XRP-USDT | $0.999 0.0003994 Eth | $70,556,825.00 137,942,847.220 XRP | 0.0026% |
67 | Bybit | MNT-USDT | $0.999 0.0003994 Eth | $69,630,195.00 117,191,413.210 MNT | 0.0023% |
68 | Bybit | DOGE-USDT | $0.999 0.0003994 Eth | $69,426,384.00 426,228,549.000 DOGE | 0.0082% |
69 | HTX | ETH-USDT | $0.9991 0.0003994 Eth | $67,280,599.00 26,416.895 ETH | 0.0000% |
70 | Slex | BTC-USDT | $0.9989 0.0003992 Eth | $66,686,170.00 947.009 BTC | 0.0000% |
71 | Bitget | SOL-USDT | $0.999 0.0003994 Eth | $66,118,640.00 390,283.863 SOL | 0.0000% |
72 | BingX | BTC-USDT | $0.9991 0.0003994 Eth | $62,742,538.00 890.687 BTC | 0.0000% |
73 | Bitget | BGB-USDT | $0.999 0.0003994 Eth | $62,403,015.00 55,123,357.165 BGB | 0.0011% |
74 | Gate.io | KAS-USDT | $0.9991 0.0003994 Eth | $61,586,095.00 533,884,505.490 KAS | 0.0103% |
75 | HTX | DOGE-USDT | $0.9991 0.0003994 Eth | $59,421,945.00 365,422,384.030 DOGE | 0.0070% |
76 | CoinEx | BTC-USDT | $0.9991 0.0003995 Eth | $56,746,958.00 804.964 BTC | 0.0000% |
77 | MEXC | MX-USDT | $0.9991 0.0003995 Eth | $55,036,975.00 20,101,570.280 MX | 0.0004% |
78 | FameEX | DOGE-USDT | $0.999 0.0003994 Eth | $52,788,657.00 325,142,376.036 DOGE | 0.0062% |
79 | DigiFinex | DOGE-USDT | $0.9991 0.0003994 Eth | $51,720,418.00 326,475,450.260 DOGE | 0.0063% |
80 | OKX | SUI-USDT | $0.9991 0.0003994 Eth | $46,457,037.00 23,395,710.474 SUI | 0.0004% |
81 | HTX | PEPE-USDT | $0.999 0.0003994 Eth | $46,391,783.00 5,064,788,197,488.210 PEPE | 97.2451% |
82 | BVOX | SOL-USDT | $0.9991 0.0003995 Eth | $45,722,077.00 270,344.520 SOL | 0.0000% |
83 | Bybit | APEX-USDT | $0.999 0.0003994 Eth | $45,279,819.00 32,588,263.410 APEX | 0.0006% |
84 | Gate.io | SUI-USDT | $0.9991 0.0003994 Eth | $44,096,112.00 22,221,282.640 SUI | 0.0004% |
85 | PointPay | BTC-USDT | $0.9989 0.0003995 Eth | $43,387,934.00 616.505 BTC | 0.0000% |
86 | Binance | BOME-USDT | $0.9992 0.0003994 Eth | $42,921,048.00 5,251,561,873.000 BOME | 0.1008% |
87 | Bitunix | USDC-USDT | $0.999 0.0003994 Eth | $42,424,337.00 42,433,175.445 USDC | 0.0008% |
88 | Bitunix | DOGE-USDT | $0.999 0.0003994 Eth | $42,059,811.00 265,629,204.000 DOGE | 0.0051% |
89 | Azbit | BNB-USDT | $0.9991 0.0003994 Eth | $40,485,796.00 70,073.130 BNB | 0.0000% |
90 | MEXC | SUI-USDT | $0.9991 0.0003995 Eth | $39,266,278.00 20,341,338.540 SUI | 0.0004% |
91 | BTSE | DOGE-USDT | $0.999 0.0003990 Eth | $38,483,570.00 242,969,050.797 DOGE | 0.0047% |
92 | DigiFinex | SOL-USDT | $0.9991 0.0003994 Eth | $38,369,236.00 231,134.730 SOL | 0.0000% |
93 | BingX | ETH-USDT | $0.9991 0.0003994 Eth | $37,631,136.00 14,793.485 ETH | 0.0000% |
94 | Bitget | NEIROCTO-USDT | $0.9991 0.0003994 Eth | $32,838,094.00 20,509,868,354.710 NEIROCTO | 0.3938% |
95 | Gate.io | ETHFI-USDT | $0.9991 0.0003994 Eth | $32,643,895.00 22,664,754.440 ETHFI | 0.0004% |
96 | Gate.io | SOL-USDT | $0.9991 0.0003994 Eth | $31,951,351.00 188,417.787 SOL | 0.0000% |
97 | HashKey Global | BTC-USDT | $0.9985 0.0003992 Eth | $30,644,792.00 436.085 BTC | 0.0000% |
98 | Bitget | TURBO-USDT | $0.999 0.0003994 Eth | $26,945,154.00 3,117,975,283.000 TURBO | 0.0599% |
99 | WhiteBIT | AVAX-USDT | $0.999 0.0003994 Eth | $24,489,589.00 984,307.913 AVAX | 0.0000% |
100 | Kraken | BTC-USDT | $0.9988 0.0003993 Eth | $23,061,238.00 332.553 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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