Overview
Max Total Supply
76,926,220,145.483487 USDT
Holders
6,555,446 ( -0.063%)
Market
Price
$1.00 @ 0.000303 ETH (-0.09%)
Onchain Market Cap
$76,769,675,287.49
Circulating Supply Market Cap
$139,366,077,237.00
Other Info
Token Contract (WITH 6 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | OrangeX | BTC-USDT | $0.9988 0.0003037 Eth | $3,122,216,195.00 32,856.861 BTC | 0.0000% |
2 | Binance | BTC-USDT | $0.9987 0.0003026 Eth | $2,745,768,996.00 28,911.871 BTC | 0.0000% |
3 | Bybit | BTC-USDT | $0.9986 0.0003027 Eth | $2,474,826,247.00 26,011.935 BTC | 0.0000% |
4 | Pionex | BTC-USDT | $0.9987 0.0003039 Eth | $2,097,885,850.00 22,076.488 BTC | 0.0000% |
5 | FameEX | BTC-USDT | $0.9987 0.0003035 Eth | $2,074,931,165.00 21,846.708 BTC | 0.0000% |
6 | Ourbit | BTC-USDT | $0.9993 0.0003028 Eth | $1,611,079,229.00 16,943.599 BTC | 0.0000% |
7 | Toobit | BTC-USDT | $0.9984 0.0003034 Eth | $1,535,369,012.00 16,163.036 BTC | 0.0000% |
8 | WhiteBIT | BTC-USDT | $0.9984 0.0003040 Eth | $1,483,111,682.00 15,887.420 BTC | 0.0000% |
9 | OrangeX | ETH-USDT | $0.9964 0.0003037 Eth | $1,378,671,312.00 419,072.434 ETH | 0.0000% |
10 | Binance | USDC-USDT | $0.9984 0.0003035 Eth | $1,138,307,148.00 1,138,964,209.000 USDC | 0.0033% |
11 | BitMart | BTC-USDT | $0.999 0.0003038 Eth | $1,096,274,579.00 11,733.237 BTC | 0.0000% |
12 | Tapbit | ETH-USDT | $0.9988 0.0003038 Eth | $1,028,076,045.00 311,737.014 ETH | 0.0000% |
13 | Pionex | ETH-USDT | $0.9987 0.0003039 Eth | $1,017,487,558.00 308,515.405 ETH | 0.0000% |
14 | FameEX | ETH-USDT | $0.9985 0.0003027 Eth | $983,786,176.00 298,488.805 ETH | 0.0000% |
15 | Toobit | ETH-USDT | $0.9984 0.0003034 Eth | $974,424,827.00 295,657.873 ETH | 0.0000% |
16 | CoinW | BTC-USDT | $0.9988 0.0003037 Eth | $962,773,646.00 10,327.378 BTC | 0.0000% |
17 | AscendEX (BitMax) | BTC-USDT | $0.9987 0.0003026 Eth | $924,472,008.00 9,886.911 BTC | 0.0000% |
18 | Bybit | ETH-USDT | $0.9986 0.0003027 Eth | $823,694,037.00 249,848.322 ETH | 0.0000% |
19 | Bitget | BTC-USDT | $0.9985 0.0003027 Eth | $809,367,340.00 8,522.052 BTC | 0.0000% |
20 | OKX | BTC-USDT | $0.9987 0.0003026 Eth | $784,816,576.00 8,265.292 BTC | 0.0000% |
21 | Binance | XRP-USDT | $0.9984 0.0003035 Eth | $784,383,265.00 358,140,983.000 XRP | 0.0010% |
22 | Bitget | ETH-USDT | $0.9985 0.0003027 Eth | $771,863,251.00 234,071.203 ETH | 0.0000% |
23 | WhiteBIT | ETH-USDT | $0.9986 0.0003035 Eth | $758,664,342.00 231,312.114 ETH | 0.0000% |
24 | Binance | SOL-USDT | $0.9984 0.0003040 Eth | $714,375,709.00 3,930,309.411 SOL | 0.0000% |
25 | BVOX | ETH-USDT | $0.9987 0.0003026 Eth | $676,149,746.00 205,061.530 ETH | 0.0000% |
26 | Binance | DOGE-USDT | $0.9985 0.0003027 Eth | $650,644,277.00 2,082,025,783.000 DOGE | 0.0061% |
27 | OKX | ETH-USDT | $0.9985 0.0003027 Eth | $647,562,330.00 196,450.851 ETH | 0.0000% |
28 | P2B | BTC-USDT | $0.9985 0.0003041 Eth | $625,748,185.00 6,697.837 BTC | 0.0000% |
29 | Coinbase Exchange | USDT-USD | $0.9987 0.0003026 Eth | $619,433,435.00 620,258,378.730 USDT | 0.0018% |
30 | Ourbit | ETH-USDT | $0.9984 0.0003041 Eth | $618,566,096.00 187,663.946 ETH | 0.0000% |
31 | Hotcoin | BTC-USDT | $0.9982 0.0003039 Eth | $576,353,721.00 6,172.397 BTC | 0.0000% |
32 | BitMart | ETH-USDT | $0.999 0.0003038 Eth | $552,797,079.00 167,922.415 ETH | 0.0000% |
33 | AscendEX (BitMax) | ETH-USDT | $0.9987 0.0003026 Eth | $513,315,400.00 155,656.694 ETH | 0.0000% |
34 | LBank | BTC-USDT | $0.999 0.0003038 Eth | $508,205,346.00 5,430.089 BTC | 0.0000% |
35 | Bitunix | BTC-USDT | $0.9985 0.0003027 Eth | $493,421,482.00 5,278.436 BTC | 0.0000% |
36 | CoinW | ETH-USDT | $0.9988 0.0003037 Eth | $411,934,535.00 125,347.256 ETH | 0.0000% |
37 | Binance | SUI-USDT | $0.9985 0.0003040 Eth | $384,678,188.00 89,636,156.500 SUI | 0.0003% |
38 | Binance | PEPE-USDT | $0.9989 0.0003036 Eth | $379,372,144.00 21,280,239,860,829.000 PEPE | 61.9501% |
39 | Binance | BNB-USDT | $0.9984 0.0003040 Eth | $373,478,497.00 564,869.423 BNB | 0.0000% |
40 | OKX | DOGE-USDT | $0.9985 0.0003027 Eth | $355,071,967.00 1,135,448,506.534 DOGE | 0.0033% |
41 | BTSE | BTC-USDT | $0.9985 0.0003027 Eth | $322,776,891.00 3,453.088 BTC | 0.0000% |
42 | BigONE | BTC-USDT | $0.9985 0.0003040 Eth | $310,925,875.00 3,336.566 BTC | 0.0000% |
43 | LATOKEN | BTC-USDT | $1.001 0.0003037 Eth | $309,421,218.00 3,298.761 BTC | 0.0000% |
44 | Binance | USUAL-USDT | $0.9988 0.0003037 Eth | $283,430,949.00 261,063,657.200 USUAL | 0.0008% |
45 | WEEX | BTC-USDT | $0.9988 0.0003038 Eth | $261,755,279.00 2,758.368 BTC | 0.0000% |
46 | Biconomy.com | BTC-USDT | $0.999 0.0003038 Eth | $259,049,326.00 2,723.583 BTC | 0.0000% |
47 | Bitunix | ETH-USDT | $0.9985 0.0003027 Eth | $245,711,554.00 74,518.849 ETH | 0.0000% |
48 | Bybit | XRP-USDT | $0.9986 0.0003027 Eth | $245,476,318.00 112,074,350.640 XRP | 0.0003% |
49 | Kraken | USDT-EUR | $0.999 0.0003027 Eth | $240,124,340.00 240,370,410.404 USDT | 0.0007% |
50 | XT.COM | ETH-USDT | $0.9987 0.0003026 Eth | $235,379,354.00 71,403.105 ETH | 0.0000% |
51 | Bybit | SOL-USDT | $0.9986 0.0003027 Eth | $228,809,480.00 1,257,738.344 SOL | 0.0000% |
52 | Binance | TRX-USDT | $0.9985 0.0003027 Eth | $228,154,890.00 927,758,580.400 TRX | 0.0027% |
53 | FameEX | SOL-USDT | $0.9988 0.0003036 Eth | $219,608,915.00 1,207,807.433 SOL | 0.0000% |
54 | Bybit | USDC-USDT | $0.9986 0.0003027 Eth | $215,132,588.00 215,221,247.540 USDC | 0.0006% |
55 | LBank | ETH-USDT | $0.999 0.0003038 Eth | $213,353,641.00 64,621.445 ETH | 0.0000% |
56 | Bitget | XRP-USDT | $0.9985 0.0003027 Eth | $212,182,787.00 96,940,193.556 XRP | 0.0003% |
57 | Binance | ADA-USDT | $0.9985 0.0003027 Eth | $210,374,576.00 237,616,391.800 ADA | 0.0007% |
58 | LATOKEN | ETH-USDT | $0.9988 0.0003037 Eth | $208,898,329.00 63,586.584 ETH | 0.0000% |
59 | Binance | ENA-USDT | $0.9985 0.0003027 Eth | $208,876,397.00 199,537,365.500 ENA | 0.0006% |
60 | Bitget | DOGE-USDT | $0.9985 0.0003027 Eth | $198,298,705.00 634,312,116.859 DOGE | 0.0018% |
61 | Binance | PNUT-USDT | $0.9985 0.0003027 Eth | $195,068,108.00 271,814,219.000 PNUT | 0.0008% |
62 | WhiteBIT | XRP-USDT | $1.001 0.0003037 Eth | $180,924,452.00 84,000,195.240 XRP | 0.0002% |
63 | Binance | HBAR-USDT | $0.9984 0.0003040 Eth | $178,627,453.00 669,487,139.000 HBAR | 0.0019% |
64 | LBank | SOL-USDT | $0.9989 0.0003027 Eth | $166,298,893.00 904,318.037 SOL | 0.0000% |
65 | WhiteBIT | SUI-USDT | $1.001 0.0003037 Eth | $164,884,666.00 39,724,140.715 SUI | 0.0001% |
66 | Hotcoin | ETH-USDT | $0.9987 0.0003035 Eth | $161,885,512.00 49,212.465 ETH | 0.0000% |
67 | Kraken | USDT-USD | $0.9987 0.0003027 Eth | $156,701,559.00 156,902,394.262 USDT | 0.0005% |
68 | WhiteBIT | PEPE-USDT | $1.001 0.0003037 Eth | $151,136,908.00 8,604,236,549,288.000 PEPE | 25.0483% |
69 | BTSE | ETH-USDT | $0.9987 0.0003036 Eth | $150,351,240.00 45,758.317 ETH | 0.0000% |
70 | Biconomy.com | ETH-USDT | $0.9985 0.0003044 Eth | $149,517,699.00 45,336.086 ETH | 0.0000% |
71 | Coinstore | BTC-USDT | $0.999 0.0003038 Eth | $148,239,767.00 1,556.676 BTC | 0.0000% |
72 | WEEX | ETH-USDT | $0.9985 0.0003035 Eth | $137,228,637.00 41,689.198 ETH | 0.0000% |
73 | OKX | SOL-USDT | $0.9985 0.0003027 Eth | $135,661,511.00 744,612.817 SOL | 0.0000% |
74 | Binance | MOVE-USDT | $0.9985 0.0003040 Eth | $134,625,630.00 172,362,302.900 MOVE | 0.0005% |
75 | Bybit | MNT-USDT | $0.9985 0.0003027 Eth | $131,985,024.00 112,473,914.610 MNT | 0.0003% |
76 | Bybit | DOGE-USDT | $0.9986 0.0003027 Eth | $127,483,016.00 408,041,331.900 DOGE | 0.0012% |
77 | Deepcoin | SOL-USDT | $0.9984 0.0003040 Eth | $127,113,850.00 707,223.732 SOL | 0.0000% |
78 | Coinbase Exchange | USDT-USDC | $0.9993 0.0003028 Eth | $126,362,291.00 126,445,309.250 USDT | 0.0004% |
79 | Fastex | BTC-USDT | $0.9987 0.0003036 Eth | $125,861,627.00 1,348.946 BTC | 0.0000% |
80 | HTX | ETH-USDT | $0.9987 0.0003026 Eth | $119,876,129.00 36,276.795 ETH | 0.0000% |
81 | HTX | DOGE-USDT | $0.9987 0.0003026 Eth | $119,087,761.00 380,288,045.895 DOGE | 0.0011% |
82 | Azbit | BTC-USDT | $0.9983 0.0003039 Eth | $116,028,829.00 1,221.482 BTC | 0.0000% |
83 | OrangeX | DOGE-USDT | $0.9985 0.0003044 Eth | $112,301,683.00 359,511,233.000 DOGE | 0.0010% |
84 | LBank | DOGE-USDT | $0.9983 0.0003035 Eth | $108,577,788.00 355,575,775.000 DOGE | 0.0010% |
85 | Bitget | SOL-USDT | $0.9985 0.0003027 Eth | $108,342,252.00 595,361.890 SOL | 0.0000% |
86 | Bitget | SUI-USDT | $0.9985 0.0003027 Eth | $104,962,760.00 24,454,473.040 SUI | 0.0001% |
87 | Dex-Trade | BTC-USDT | $0.9987 0.0003036 Eth | $100,028,428.00 1,072.886 BTC | 0.0000% |
88 | Binance | UNI-USDT | $0.9985 0.0003027 Eth | $96,453,357.00 6,968,056.160 UNI | 0.0000% |
89 | Binance | NEIRO-USDT | $0.9984 0.0003035 Eth | $95,256,359.00 95,125,176,915.000 NEIRO | 0.2769% |
90 | MEXC | SUI-USDT | $0.9987 0.0003026 Eth | $94,968,901.00 22,999,184.320 SUI | 0.0001% |
91 | BYDFi | BTC-USDT | $0.9987 0.0003027 Eth | $87,908,309.00 936.479 BTC | 0.0000% |
92 | Hibt | ETH-USDT | $1.001 0.0003037 Eth | $84,400,337.00 25,542.139 ETH | 0.0000% |
93 | OKX | SUI-USDT | $0.9985 0.0003027 Eth | $83,473,726.00 19,439,396.491 SUI | 0.0001% |
94 | OKX | PEPE-USDT | $0.9985 0.0003027 Eth | $77,692,905.00 4,359,249,318,821.000 PEPE | 12.6905% |
95 | CoinEx | BTC-USDT | $0.9987 0.0003035 Eth | $72,264,722.00 759.916 BTC | 0.0000% |
96 | BingX | BTC-USDT | $0.9987 0.0003026 Eth | $71,217,600.00 747.716 BTC | 0.0000% |
97 | WhiteBIT | ADA-USDT | $0.9985 0.0003027 Eth | $70,686,000.00 81,475,079.340 ADA | 0.0002% |
98 | Binance | ARB-USDT | $0.9985 0.0003027 Eth | $69,906,301.00 93,108,560.600 ARB | 0.0003% |
99 | WhiteBIT | LINK-USDT | $0.9986 0.0003035 Eth | $65,373,490.00 2,947,670.700 LINK | 0.0000% |
100 | BingX | ETH-USDT | $0.9987 0.0003026 Eth | $57,469,785.00 17,412.000 ETH | 0.0000% |
Contract Name:
TetherToken
Compiler Version
v0.4.18+commit.9cf6e910
Optimization Enabled:
No with 0 runs
Other Settings:
default evmVersion, Audited
Contract Source Code (Solidity)Audit Report
/** *Submitted for verification at Etherscan.io on 2017-11-28 */ pragma solidity ^0.4.17; /** * @title SafeMath * @dev Math operations with safety checks that throw on error */ library SafeMath { function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a * b; assert(c / a == b); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { // assert(b > 0); // Solidity automatically throws when dividing by 0 uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { assert(b <= a); return a - b; } function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; assert(c >= a); return c; } } /** * @title Ownable * @dev The Ownable contract has an owner address, and provides basic authorization control * functions, this simplifies the implementation of "user permissions". */ contract Ownable { address public owner; /** * @dev The Ownable constructor sets the original `owner` of the contract to the sender * account. */ function Ownable() public { owner = msg.sender; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(msg.sender == owner); _; } /** * @dev Allows the current owner to transfer control of the contract to a newOwner. * @param newOwner The address to transfer ownership to. */ function transferOwnership(address newOwner) public onlyOwner { if (newOwner != address(0)) { owner = newOwner; } } } /** * @title ERC20Basic * @dev Simpler version of ERC20 interface * @dev see https://github.com/ethereum/EIPs/issues/20 */ contract ERC20Basic { uint public _totalSupply; function totalSupply() public constant returns (uint); function balanceOf(address who) public constant returns (uint); function transfer(address to, uint value) public; event Transfer(address indexed from, address indexed to, uint value); } /** * @title ERC20 interface * @dev see https://github.com/ethereum/EIPs/issues/20 */ contract ERC20 is ERC20Basic { function allowance(address owner, address spender) public constant returns (uint); function transferFrom(address from, address to, uint value) public; function approve(address spender, uint value) public; event Approval(address indexed owner, address indexed spender, uint value); } /** * @title Basic token * @dev Basic version of StandardToken, with no allowances. */ contract BasicToken is Ownable, ERC20Basic { using SafeMath for uint; mapping(address => uint) public balances; // additional variables for use if transaction fees ever became necessary uint public basisPointsRate = 0; uint public maximumFee = 0; /** * @dev Fix for the ERC20 short address attack. */ modifier onlyPayloadSize(uint size) { require(!(msg.data.length < size + 4)); _; } /** * @dev transfer token for a specified address * @param _to The address to transfer to. * @param _value The amount to be transferred. */ function transfer(address _to, uint _value) public onlyPayloadSize(2 * 32) { uint fee = (_value.mul(basisPointsRate)).div(10000); if (fee > maximumFee) { fee = maximumFee; } uint sendAmount = _value.sub(fee); balances[msg.sender] = balances[msg.sender].sub(_value); balances[_to] = balances[_to].add(sendAmount); if (fee > 0) { balances[owner] = balances[owner].add(fee); Transfer(msg.sender, owner, fee); } Transfer(msg.sender, _to, sendAmount); } /** * @dev Gets the balance of the specified address. * @param _owner The address to query the the balance of. * @return An uint representing the amount owned by the passed address. */ function balanceOf(address _owner) public constant returns (uint balance) { return balances[_owner]; } } /** * @title Standard ERC20 token * * @dev Implementation of the basic standard token. * @dev https://github.com/ethereum/EIPs/issues/20 * @dev Based oncode by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol */ contract StandardToken is BasicToken, ERC20 { mapping (address => mapping (address => uint)) public allowed; uint public constant MAX_UINT = 2**256 - 1; /** * @dev Transfer tokens from one address to another * @param _from address The address which you want to send tokens from * @param _to address The address which you want to transfer to * @param _value uint the amount of tokens to be transferred */ function transferFrom(address _from, address _to, uint _value) public onlyPayloadSize(3 * 32) { var _allowance = allowed[_from][msg.sender]; // Check is not needed because sub(_allowance, _value) will already throw if this condition is not met // if (_value > _allowance) throw; uint fee = (_value.mul(basisPointsRate)).div(10000); if (fee > maximumFee) { fee = maximumFee; } if (_allowance < MAX_UINT) { allowed[_from][msg.sender] = _allowance.sub(_value); } uint sendAmount = _value.sub(fee); balances[_from] = balances[_from].sub(_value); balances[_to] = balances[_to].add(sendAmount); if (fee > 0) { balances[owner] = balances[owner].add(fee); Transfer(_from, owner, fee); } Transfer(_from, _to, sendAmount); } /** * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender. * @param _spender The address which will spend the funds. * @param _value The amount of tokens to be spent. */ function approve(address _spender, uint _value) public onlyPayloadSize(2 * 32) { // To change the approve amount you first have to reduce the addresses` // allowance to zero by calling `approve(_spender, 0)` if it is not // already 0 to mitigate the race condition described here: // https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 require(!((_value != 0) && (allowed[msg.sender][_spender] != 0))); allowed[msg.sender][_spender] = _value; Approval(msg.sender, _spender, _value); } /** * @dev Function to check the amount of tokens than an owner allowed to a spender. * @param _owner address The address which owns the funds. * @param _spender address The address which will spend the funds. * @return A uint specifying the amount of tokens still available for the spender. */ function allowance(address _owner, address _spender) public constant returns (uint remaining) { return allowed[_owner][_spender]; } } /** * @title Pausable * @dev Base contract which allows children to implement an emergency stop mechanism. */ contract Pausable is Ownable { event Pause(); event Unpause(); bool public paused = false; /** * @dev Modifier to make a function callable only when the contract is not paused. */ modifier whenNotPaused() { require(!paused); _; } /** * @dev Modifier to make a function callable only when the contract is paused. */ modifier whenPaused() { require(paused); _; } /** * @dev called by the owner to pause, triggers stopped state */ function pause() onlyOwner whenNotPaused public { paused = true; Pause(); } /** * @dev called by the owner to unpause, returns to normal state */ function unpause() onlyOwner whenPaused public { paused = false; Unpause(); } } contract BlackList is Ownable, BasicToken { /////// Getters to allow the same blacklist to be used also by other contracts (including upgraded Tether) /////// function getBlackListStatus(address _maker) external constant returns (bool) { return isBlackListed[_maker]; } function getOwner() external constant returns (address) { return owner; } mapping (address => bool) public isBlackListed; function addBlackList (address _evilUser) public onlyOwner { isBlackListed[_evilUser] = true; AddedBlackList(_evilUser); } function removeBlackList (address _clearedUser) public onlyOwner { isBlackListed[_clearedUser] = false; RemovedBlackList(_clearedUser); } function destroyBlackFunds (address _blackListedUser) public onlyOwner { require(isBlackListed[_blackListedUser]); uint dirtyFunds = balanceOf(_blackListedUser); balances[_blackListedUser] = 0; _totalSupply -= dirtyFunds; DestroyedBlackFunds(_blackListedUser, dirtyFunds); } event DestroyedBlackFunds(address _blackListedUser, uint _balance); event AddedBlackList(address _user); event RemovedBlackList(address _user); } contract UpgradedStandardToken is StandardToken{ // those methods are called by the legacy contract // and they must ensure msg.sender to be the contract address function transferByLegacy(address from, address to, uint value) public; function transferFromByLegacy(address sender, address from, address spender, uint value) public; function approveByLegacy(address from, address spender, uint value) public; } contract TetherToken is Pausable, StandardToken, BlackList { string public name; string public symbol; uint public decimals; address public upgradedAddress; bool public deprecated; // The contract can be initialized with a number of tokens // All the tokens are deposited to the owner address // // @param _balance Initial supply of the contract // @param _name Token Name // @param _symbol Token symbol // @param _decimals Token decimals function TetherToken(uint _initialSupply, string _name, string _symbol, uint _decimals) public { _totalSupply = _initialSupply; name = _name; symbol = _symbol; decimals = _decimals; balances[owner] = _initialSupply; deprecated = false; } // Forward ERC20 methods to upgraded contract if this one is deprecated function transfer(address _to, uint _value) public whenNotPaused { require(!isBlackListed[msg.sender]); if (deprecated) { return UpgradedStandardToken(upgradedAddress).transferByLegacy(msg.sender, _to, _value); } else { return super.transfer(_to, _value); } } // Forward ERC20 methods to upgraded contract if this one is deprecated function transferFrom(address _from, address _to, uint _value) public whenNotPaused { require(!isBlackListed[_from]); if (deprecated) { return UpgradedStandardToken(upgradedAddress).transferFromByLegacy(msg.sender, _from, _to, _value); } else { return super.transferFrom(_from, _to, _value); } } // Forward ERC20 methods to upgraded contract if this one is deprecated function balanceOf(address who) public constant returns (uint) { if (deprecated) { return UpgradedStandardToken(upgradedAddress).balanceOf(who); } else { return super.balanceOf(who); } } // Forward ERC20 methods to upgraded contract if this one is deprecated function approve(address _spender, uint _value) public onlyPayloadSize(2 * 32) { if (deprecated) { return UpgradedStandardToken(upgradedAddress).approveByLegacy(msg.sender, _spender, _value); } else { return super.approve(_spender, _value); } } // Forward ERC20 methods to upgraded contract if this one is deprecated function allowance(address _owner, address _spender) public constant returns (uint remaining) { if (deprecated) { return StandardToken(upgradedAddress).allowance(_owner, _spender); } else { return super.allowance(_owner, _spender); } } // deprecate current contract in favour of a new one function deprecate(address _upgradedAddress) public onlyOwner { deprecated = true; upgradedAddress = _upgradedAddress; Deprecate(_upgradedAddress); } // deprecate current contract if favour of a new one function totalSupply() public constant returns (uint) { if (deprecated) { return StandardToken(upgradedAddress).totalSupply(); } else { return _totalSupply; } } // Issue a new amount of tokens // these tokens are deposited into the owner address // // @param _amount Number of tokens to be issued function issue(uint amount) public onlyOwner { require(_totalSupply + amount > _totalSupply); require(balances[owner] + amount > balances[owner]); balances[owner] += amount; _totalSupply += amount; Issue(amount); } // Redeem tokens. // These tokens are withdrawn from the owner address // if the balance must be enough to cover the redeem // or the call will fail. // @param _amount Number of tokens to be issued function redeem(uint amount) public onlyOwner { require(_totalSupply >= amount); require(balances[owner] >= amount); _totalSupply -= amount; balances[owner] -= amount; Redeem(amount); } function setParams(uint newBasisPoints, uint newMaxFee) public onlyOwner { // Ensure transparency by hardcoding limit beyond which fees can never be added require(newBasisPoints < 20); require(newMaxFee < 50); basisPointsRate = newBasisPoints; maximumFee = newMaxFee.mul(10**decimals); Params(basisPointsRate, maximumFee); } // Called when new token are issued event Issue(uint amount); // Called when tokens are redeemed event Redeem(uint amount); // Called when contract is deprecated event Deprecate(address newAddress); // Called if contract ever adds fees event Params(uint feeBasisPoints, uint maxFee); }
Contract Security Audit
- Callisto Network - July 10th, 2019 - Security Audit Report
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Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000000000000000000000000000000000174876e800000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000c00000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000a546574686572205553440000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000045553445400000000000000000000000000000000000000000000000000000000
-----Decoded View---------------
Arg [0] : _initialSupply (uint256): 100000000000
Arg [1] : _name (string): Tether USD
Arg [2] : _symbol (string): USDT
Arg [3] : _decimals (uint256): 6
-----Encoded View---------------
8 Constructor Arguments found :
Arg [0] : 000000000000000000000000000000000000000000000000000000174876e800
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000080
Arg [2] : 00000000000000000000000000000000000000000000000000000000000000c0
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000006
Arg [4] : 000000000000000000000000000000000000000000000000000000000000000a
Arg [5] : 5465746865722055534400000000000000000000000000000000000000000000
Arg [6] : 0000000000000000000000000000000000000000000000000000000000000004
Arg [7] : 5553445400000000000000000000000000000000000000000000000000000000
Swarm Source
bzzr://645ee12d73db47fd78ba77fa1f824c3c8f9184061b3b10386beb4dc9236abb28
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