Overview
Max Total Supply
70,929,452,093.657795 USDT
Holders
6,447,036 ( 0.071%)
Market
Price
$1.00 @ 0.000269 ETH (-0.09%)
Onchain Market Cap
$70,929,452,093.66
Circulating Supply Market Cap
$133,972,863,771.00
Other Info
Token Contract (WITH 6 Decimals)
Balance
1,412.878615 USDTValue
$1,412.88 ( ~0.380669014797754 Eth) [0.0000%]Loading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | XRP-USDT | $1.001 0.0002696 Eth | $2,091,889,649.00 1,125,871,372.650 XRP | 0.0052% |
2 | Binance | ETH-USDT | $1.001 0.0002697 Eth | $1,751,287,818.00 477,781.967 ETH | 0.0000% |
3 | Pionex | ETH-USDT | $1.001 0.0002697 Eth | $1,472,529,229.00 401,975.066 ETH | 0.0000% |
4 | Binance | BTC-USDT | $1.00 0.0002697 Eth | $1,442,475,710.00 14,896.876 BTC | 0.0000% |
5 | Tapbit | ETH-USDT | $1.00 0.0002696 Eth | $1,363,152,349.00 371,807.725 ETH | 0.0000% |
6 | Pionex | BTC-USDT | $1.00 0.0002699 Eth | $1,326,304,162.00 13,696.660 BTC | 0.0000% |
7 | CoinW | BTC-USDT | $1.001 0.0002697 Eth | $1,288,156,755.00 13,288.660 BTC | 0.0000% |
8 | Toobit | ETH-USDT | $1.001 0.0002698 Eth | $1,158,282,136.00 316,005.305 ETH | 0.0000% |
9 | BVOX | BTC-USDT | $1.00 0.0002697 Eth | $1,142,650,172.00 11,800.099 BTC | 0.0000% |
10 | Binance | DOGE-USDT | $1.001 0.0002697 Eth | $1,041,672,376.00 2,449,260,512.000 DOGE | 0.0114% |
11 | Bybit | BTC-USDT | $1.00 0.0002696 Eth | $1,001,158,824.00 10,339.527 BTC | 0.0000% |
12 | AscendEX (BitMax) | BTC-USDT | $1.001 0.0002697 Eth | $944,977,146.00 9,748.537 BTC | 0.0000% |
13 | Ourbit | BTC-USDT | $1.00 0.0002698 Eth | $871,060,524.00 8,995.538 BTC | 0.0000% |
14 | CoinW | ETH-USDT | $1.00 0.0002696 Eth | $870,733,755.00 234,696.029 ETH | 0.0000% |
15 | Toobit | BTC-USDT | $1.001 0.0002696 Eth | $848,889,218.00 8,754.101 BTC | 0.0000% |
16 | BVOX | ETH-USDT | $1.001 0.0002697 Eth | $805,267,622.00 219,711.727 ETH | 0.0000% |
17 | MEXC | ETH-USDT | $1.00 0.0002696 Eth | $699,327,706.00 188,518.424 ETH | 0.0000% |
18 | P2B | ETH-USDT | $1.00 0.0002697 Eth | $677,353,502.00 182,351.698 ETH | 0.0000% |
19 | Hotcoin | BTC-USDT | $1.00 0.0002696 Eth | $643,865,638.00 6,642.242 BTC | 0.0000% |
20 | DigiFinex | ETH-USDT | $1.00 0.0002697 Eth | $629,324,204.00 169,650.143 ETH | 0.0000% |
21 | Bybit | ETH-USDT | $1.00 0.0002696 Eth | $605,443,866.00 165,367.118 ETH | 0.0000% |
22 | BitMart | ETH-USDT | $1.001 0.0002697 Eth | $593,983,880.00 159,906.229 ETH | 0.0000% |
23 | WEEX | BTC-USDT | $1.001 0.0002697 Eth | $591,208,488.00 6,104.238 BTC | 0.0000% |
24 | WhiteBIT | BTC-USDT | $1.00 0.0002697 Eth | $588,748,886.00 6,074.713 BTC | 0.0000% |
25 | DigiFinex | BTC-USDT | $1.00 0.0002697 Eth | $582,328,565.00 6,007.528 BTC | 0.0000% |
26 | Ourbit | ETH-USDT | $1.001 0.0002698 Eth | $579,669,627.00 158,164.315 ETH | 0.0000% |
27 | MEXC | XRP-USDT | $1.00 0.0002696 Eth | $568,367,724.00 298,618,656.300 XRP | 0.0014% |
28 | LBank | BTC-USDT | $1.00 0.0002699 Eth | $562,251,601.00 5,796.782 BTC | 0.0000% |
29 | Deepcoin | ETH-USDT | $1.001 0.0002699 Eth | $545,631,807.00 150,608.621 ETH | 0.0000% |
30 | Binance | SOL-USDT | $1.001 0.0002697 Eth | $544,853,226.00 2,250,458.911 SOL | 0.0000% |
31 | P2B | BTC-USDT | $1.001 0.0002698 Eth | $521,373,155.00 5,375.765 BTC | 0.0000% |
32 | AscendEX (BitMax) | ETH-USDT | $1.001 0.0002697 Eth | $518,808,061.00 139,847.818 ETH | 0.0000% |
33 | Bitget | XRP-USDT | $1.00 0.0002697 Eth | $516,213,269.00 278,063,865.579 XRP | 0.0013% |
34 | Gate.io | XRP-USDT | $1.001 0.0002697 Eth | $511,495,709.00 275,467,499.544 XRP | 0.0013% |
35 | Bitget | ETH-USDT | $1.00 0.0002697 Eth | $503,235,023.00 137,317.529 ETH | 0.0000% |
36 | XT.COM | ETH-USDT | $1.001 0.0002698 Eth | $490,540,099.00 133,853.906 ETH | 0.0000% |
37 | Binance | ENS-USDT | $1.001 0.0002697 Eth | $483,136,050.00 11,777,274.460 ENS | 0.0001% |
38 | Bybit | XRP-USDT | $1.00 0.0002696 Eth | $471,130,795.00 253,715,546.820 XRP | 0.0012% |
39 | OKX | ETH-USDT | $1.00 0.0002697 Eth | $466,715,443.00 127,214.773 ETH | 0.0000% |
40 | Binance | PEPE-USDT | $1.001 0.0002696 Eth | $442,629,859.00 21,429,818,347,279.000 PEPE | 99.6843% |
41 | MEXC | BTC-USDT | $1.00 0.0002699 Eth | $434,693,832.00 4,485.982 BTC | 0.0000% |
42 | Deepcoin | BTC-USDT | $1.00 0.0002698 Eth | $422,617,361.00 4,572.874 BTC | 0.0000% |
43 | WhiteBIT | ETH-USDT | $1.00 0.0002697 Eth | $410,693,929.00 110,665.018 ETH | 0.0000% |
44 | Binance | ACT-USDT | $1.001 0.0002697 Eth | $407,928,212.00 597,843,580.600 ACT | 0.0028% |
45 | Binance | ADA-USDT | $1.001 0.0002697 Eth | $406,722,868.00 371,854,642.600 ADA | 0.0017% |
46 | Binance | XLM-USDT | $1.001 0.0002697 Eth | $406,413,656.00 756,986,189.000 XLM | 0.0035% |
47 | Bitunix | BTC-USDT | $1.001 0.0002697 Eth | $398,835,648.00 4,114.748 BTC | 0.0000% |
48 | Bitunix | ETH-USDT | $1.001 0.0002697 Eth | $397,004,640.00 106,839.106 ETH | 0.0000% |
49 | Binance | WLD-USDT | $1.001 0.0002698 Eth | $391,495,288.00 120,098,163.900 WLD | 0.0006% |
50 | OKX | BTC-USDT | $1.00 0.0002697 Eth | $385,477,437.00 3,982.766 BTC | 0.0000% |
51 | Binance | BNB-USDT | $1.001 0.0002696 Eth | $367,429,443.00 555,801.500 BNB | 0.0000% |
52 | LBank | ETH-USDT | $1.00 0.0002698 Eth | $357,784,355.00 96,516.735 ETH | 0.0000% |
53 | OKX | DOGE-USDT | $1.001 0.0002697 Eth | $338,975,998.00 797,293,417.002 DOGE | 0.0037% |
54 | OKX | XRP-USDT | $1.00 0.0002697 Eth | $302,745,688.00 163,119,223.572 XRP | 0.0008% |
55 | BitMart | BTC-USDT | $1.001 0.0002697 Eth | $297,235,156.00 3,066.409 BTC | 0.0000% |
56 | WhiteBIT | XRP-USDT | $1.00 0.0002697 Eth | $293,875,977.00 154,516,783.370 XRP | 0.0007% |
57 | Binance | ALGO-USDT | $1.001 0.0002697 Eth | $291,973,584.00 665,349,936.000 ALGO | 0.0031% |
58 | Binance | THE-USDT | $1.001 0.0002697 Eth | $287,896,618.00 99,487,071.300 THE | 0.0005% |
59 | Bitunix | XRP-USDT | $1.001 0.0002697 Eth | $280,159,953.00 147,190,839.000 XRP | 0.0007% |
60 | Azbit | BTC-USDT | $1.00 0.0002698 Eth | $276,702,709.00 2,856.728 BTC | 0.0000% |
61 | LATOKEN | ETH-USDT | $1.001 0.0002698 Eth | $269,305,084.00 72,601.259 ETH | 0.0000% |
62 | OrangeX | ETH-USDT | $1.001 0.0002697 Eth | $264,446,654.00 72,220.892 ETH | 0.0000% |
63 | Hotcoin | DOGE-USDT | $1.001 0.0002697 Eth | $261,635,866.00 608,752,836.295 DOGE | 0.0028% |
64 | Binance | PNUT-USDT | $1.001 0.0002697 Eth | $235,655,656.00 191,409,218.700 PNUT | 0.0009% |
65 | Coinstore | ETH-USDT | $1.001 0.0002698 Eth | $233,933,495.00 63,797.567 ETH | 0.0000% |
66 | Binance | HBAR-USDT | $1.00 0.0002698 Eth | $200,490,683.00 1,161,616,936.000 HBAR | 0.0054% |
67 | Biconomy.com | ETH-USDT | $1.001 0.0002698 Eth | $200,286,588.00 54,672.059 ETH | 0.0000% |
68 | Coinbase Exchange | USDT-USD | $1.00 0.0002696 Eth | $197,174,662.00 197,085,973.560 USDT | 0.0009% |
69 | BTSE | BTC-USDT | $1.00 0.0002697 Eth | $194,800,461.00 2,009.899 BTC | 0.0000% |
70 | Bitget | DOGE-USDT | $1.00 0.0002697 Eth | $193,596,747.00 455,157,250.173 DOGE | 0.0021% |
71 | LATOKEN | BTC-USDT | $1.00 0.0002697 Eth | $189,496,601.00 1,955.208 BTC | 0.0000% |
72 | Biconomy.com | BTC-USDT | $1.001 0.0002697 Eth | $185,059,760.00 1,910.995 BTC | 0.0000% |
73 | KuCoin | XRP-USDT | $1.00 0.0002696 Eth | $181,496,235.00 95,393,667.781 XRP | 0.0004% |
74 | HTX | BTC-USDT | $1.00 0.0002697 Eth | $180,994,876.00 1,868.947 BTC | 0.0000% |
75 | BigONE | BTC-USDT | $1.00 0.0002696 Eth | $169,799,596.00 1,751.850 BTC | 0.0000% |
76 | MEXC | DOGE-USDT | $1.001 0.0002698 Eth | $166,512,408.00 388,081,029.210 DOGE | 0.0018% |
77 | Binance | SUI-USDT | $1.001 0.0002697 Eth | $157,225,183.00 45,344,155.900 SUI | 0.0002% |
78 | Gate.io | DOGE-USDT | $1.001 0.0002697 Eth | $156,945,793.00 369,474,326.480 DOGE | 0.0017% |
79 | HTX | ETH-USDT | $1.00 0.0002697 Eth | $151,437,210.00 41,391.557 ETH | 0.0000% |
80 | Binance | FIL-USDT | $1.001 0.0002697 Eth | $150,955,444.00 23,095,655.240 FIL | 0.0001% |
81 | Bitunix | DOGE-USDT | $1.001 0.0002697 Eth | $148,644,138.00 346,142,175.000 DOGE | 0.0016% |
82 | Gate.io | ETH-USDT | $1.001 0.0002697 Eth | $147,135,335.00 40,152.267 ETH | 0.0000% |
83 | LBank | SOL-USDT | $1.00 0.0002697 Eth | $147,001,748.00 609,884.692 SOL | 0.0000% |
84 | Bybit | SOL-USDT | $1.00 0.0002696 Eth | $146,378,504.00 605,105.255 SOL | 0.0000% |
85 | Bybit | USDC-USDT | $1.00 0.0002696 Eth | $144,819,502.00 144,820,058.080 USDC | 0.0007% |
86 | Bybit | DOGE-USDT | $1.00 0.0002696 Eth | $135,856,867.00 319,352,398.900 DOGE | 0.0015% |
87 | Ourbit | XRP-USDT | $1.001 0.0002698 Eth | $131,627,053.00 70,883,493.910 XRP | 0.0003% |
88 | WhiteBIT | SOL-USDT | $1.00 0.0002697 Eth | $129,089,358.00 535,490.270 SOL | 0.0000% |
89 | WhiteBIT | ADA-USDT | $1.00 0.0002697 Eth | $128,567,471.00 117,697,005.950 ADA | 0.0005% |
90 | OKX | SOL-USDT | $1.00 0.0002697 Eth | $128,226,232.00 530,566.978 SOL | 0.0000% |
91 | LBank | DOGE-USDT | $1.00 0.0002698 Eth | $127,138,115.00 296,088,884.000 DOGE | 0.0014% |
92 | DigiFinex | DOGE-USDT | $1.00 0.0002697 Eth | $112,354,158.00 261,629,210.360 DOGE | 0.0012% |
93 | Binance | ARB-USDT | $1.00 0.0002698 Eth | $109,827,479.00 114,641,628.900 ARB | 0.0005% |
94 | KuCoin | BTC-USDT | $1.00 0.0002696 Eth | $106,702,564.00 1,100.947 BTC | 0.0000% |
95 | KuCoin | ETH-USDT | $1.00 0.0002696 Eth | $102,668,894.00 27,674.460 ETH | 0.0000% |
96 | Binance | TIA-USDT | $1.001 0.0002696 Eth | $102,341,302.00 12,383,057.380 TIA | 0.0001% |
97 | Binance | NEIRO-USDT | $1.00 0.0002697 Eth | $100,984,329.00 53,735,958,752.000 NEIRO | 0.2500% |
98 | Bybit | MNT-USDT | $1.00 0.0002696 Eth | $100,123,333.00 111,483,062.000 MNT | 0.0005% |
99 | WhiteBIT | DOGE-USDT | $1.001 0.0002697 Eth | $93,860,735.00 218,568,003.200 DOGE | 0.0010% |
100 | Gate.io | BTC-USDT | $1.001 0.0002697 Eth | $87,995,720.00 908.819 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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