Overview
Max Total Supply
76,928,104,353.364467 USDT
Holders
6,573,077 ( 0.128%)
Market
Price
$1.00 @ 0.000273 ETH
Onchain Market Cap
$76,911,718,667.14
Circulating Supply Market Cap
$140,593,182,707.00
Other Info
Token Contract (WITH 6 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | BTC-USDT | $0.9994 0.0002733 Eth | $5,269,154,698.00 51,107.612 BTC | 0.0000% |
2 | OrangeX | BTC-USDT | $0.9993 0.0002733 Eth | $4,669,797,371.00 45,229.116 BTC | 0.0000% |
3 | BVOX | BTC-USDT | $0.9994 0.0002733 Eth | $3,866,333,274.00 37,491.872 BTC | 0.0000% |
4 | WEEX | BTC-USDT | $0.9994 0.0002733 Eth | $3,004,286,136.00 29,154.878 BTC | 0.0000% |
5 | Binance | ETH-USDT | $0.9999 0.0002737 Eth | $2,770,148,932.00 732,469.936 ETH | 0.0000% |
6 | OrangeX | ETH-USDT | $0.9993 0.0002733 Eth | $2,038,544,815.00 537,234.009 ETH | 0.0000% |
7 | Binance | XRP-USDT | $0.9991 0.0002733 Eth | $1,881,434,540.00 769,128,479.000 XRP | 0.0024% |
8 | Tapbit | ETH-USDT | $1.00 0.0002743 Eth | $1,841,156,663.00 486,299.461 ETH | 0.0000% |
9 | Toobit | ETH-USDT | $1.00 0.0002743 Eth | $1,778,721,650.00 469,922.209 ETH | 0.0000% |
10 | WhiteBIT | BTC-USDT | $0.9995 0.0002734 Eth | $1,644,839,807.00 16,301.744 BTC | 0.0000% |
11 | DigiFinex | BTC-USDT | $0.9994 0.0002733 Eth | $1,625,948,517.00 16,121.667 BTC | 0.0000% |
12 | Bybit | ETH-USDT | $0.9994 0.0002733 Eth | $1,594,586,557.00 421,353.890 ETH | 0.0000% |
13 | Bitget | BTC-USDT | $0.9994 0.0002733 Eth | $1,573,679,895.00 15,247.398 BTC | 0.0000% |
14 | OKX | BTC-USDT | $0.9994 0.0002733 Eth | $1,558,713,992.00 15,101.583 BTC | 0.0000% |
15 | MEXC | BTC-USDT | $0.9992 0.0002744 Eth | $1,548,632,238.00 15,380.774 BTC | 0.0000% |
16 | Binance | USDC-USDT | $0.9998 0.0002735 Eth | $1,474,453,185.00 1,474,277,149.000 USDC | 0.0045% |
17 | Bitget | ETH-USDT | $0.9994 0.0002733 Eth | $1,425,367,952.00 377,210.621 ETH | 0.0000% |
18 | BitMart | BTC-USDT | $0.9991 0.0002733 Eth | $1,408,175,895.00 13,966.709 BTC | 0.0000% |
19 | Coinbase Exchange | USDT-USD | $0.9994 0.0002733 Eth | $1,197,614,264.00 1,198,381,228.410 USDT | 0.0037% |
20 | Binance | SOL-USDT | $0.9994 0.0002733 Eth | $1,194,939,154.00 5,595,418.344 SOL | 0.0000% |
21 | BitMart | ETH-USDT | $0.9991 0.0002733 Eth | $1,170,738,430.00 320,123.277 ETH | 0.0000% |
22 | Binance | DOGE-USDT | $0.9998 0.0002735 Eth | $1,060,480,413.00 2,827,399,500.000 DOGE | 0.0087% |
23 | OKX | ETH-USDT | $0.9991 0.0002733 Eth | $1,047,556,966.00 277,806.498 ETH | 0.0000% |
24 | Binance | FDUSD-USDT | $0.9994 0.0002733 Eth | $1,008,247,092.00 1,010,638,132.000 FDUSD | 0.0031% |
25 | Bitunix | BTC-USDT | $0.9995 0.0002736 Eth | $945,808,768.00 9,378.550 BTC | 0.0000% |
26 | AscendEX (BitMax) | BTC-USDT | $0.9994 0.0002733 Eth | $912,318,979.00 9,051.537 BTC | 0.0000% |
27 | Ourbit | ETH-USDT | $0.9994 0.0002733 Eth | $832,992,189.00 219,698.473 ETH | 0.0000% |
28 | WhiteBIT | ETH-USDT | $0.9995 0.0002739 Eth | $700,698,216.00 191,910.995 ETH | 0.0000% |
29 | Gate.io | BTC-USDT | $0.9994 0.0002733 Eth | $663,403,806.00 6,436.130 BTC | 0.0000% |
30 | DigiFinex | ETH-USDT | $0.9994 0.0002733 Eth | $622,112,945.00 170,024.903 ETH | 0.0000% |
31 | Bitget | XRP-USDT | $0.9994 0.0002733 Eth | $618,849,738.00 255,714,025.802 XRP | 0.0008% |
32 | BigONE | BTC-USDT | $0.9994 0.0002739 Eth | $591,737,683.00 5,874.383 BTC | 0.0000% |
33 | Binance | PEPE-USDT | $0.9991 0.0002733 Eth | $582,695,938.00 28,096,895,069,392.000 PEPE | 86.0286% |
34 | Tapbit | BTC-USDT | $0.9995 0.0002739 Eth | $582,661,388.00 5,647.261 BTC | 0.0000% |
35 | Bybit | XRP-USDT | $0.9994 0.0002733 Eth | $576,858,830.00 237,710,039.870 XRP | 0.0007% |
36 | HTX | BTC-USDT | $0.9994 0.0002733 Eth | $559,767,575.00 5,430.474 BTC | 0.0000% |
37 | Binance | BNB-USDT | $0.9998 0.0002735 Eth | $519,903,856.00 736,335.207 BNB | 0.0000% |
38 | Binance | PENGU-USDT | $0.9994 0.0002733 Eth | $491,275,969.00 14,571,810,039.000 PENGU | 0.0446% |
39 | AscendEX (BitMax) | ETH-USDT | $0.9994 0.0002733 Eth | $490,174,782.00 133,882.605 ETH | 0.0000% |
40 | MEXC | XRP-USDT | $0.9994 0.0002733 Eth | $488,219,795.00 208,847,301.300 XRP | 0.0006% |
41 | OKX | DOGE-USDT | $0.9991 0.0002733 Eth | $471,600,078.00 1,262,654,269.875 DOGE | 0.0039% |
42 | Gate.io | ETH-USDT | $0.9994 0.0002733 Eth | $463,379,036.00 122,761.374 ETH | 0.0000% |
43 | Bybit | SOL-USDT | $0.9994 0.0002733 Eth | $455,196,453.00 2,131,873.696 SOL | 0.0000% |
44 | KuCoin | BTC-USDT | $0.9994 0.0002733 Eth | $425,569,227.00 4,222.890 BTC | 0.0000% |
45 | Bitget | BGB-USDT | $0.9994 0.0002733 Eth | $425,445,692.00 100,477,445.807 BGB | 0.0003% |
46 | LATOKEN | ETH-USDT | $1.00 0.0002743 Eth | $417,942,024.00 114,572.511 ETH | 0.0000% |
47 | Azbit | BTC-USDT | $0.9993 0.0002733 Eth | $413,523,552.00 3,985.859 BTC | 0.0000% |
48 | BTSE | BTC-USDT | $0.9995 0.0002736 Eth | $401,538,192.00 3,986.456 BTC | 0.0000% |
49 | Biconomy.com | BTC-USDT | $0.9993 0.0002744 Eth | $393,696,353.00 3,809.008 BTC | 0.0000% |
50 | Binance | ADA-USDT | $0.9994 0.0002733 Eth | $384,894,116.00 380,544,572.500 ADA | 0.0012% |
51 | Bitget | DOGE-USDT | $0.9994 0.0002733 Eth | $369,997,986.00 995,378,016.105 DOGE | 0.0030% |
52 | Bybit | USDC-USDT | $0.9994 0.0002733 Eth | $362,880,265.00 363,004,990.400 USDC | 0.0011% |
53 | OKX | XRP-USDT | $0.9991 0.0002733 Eth | $350,914,003.00 144,502,979.481 XRP | 0.0004% |
54 | Binance | TRX-USDT | $0.9998 0.0002735 Eth | $348,896,226.00 1,301,425,811.800 TRX | 0.0040% |
55 | KuCoin | ETH-USDT | $0.9994 0.0002733 Eth | $329,928,101.00 90,208.109 ETH | 0.0000% |
56 | Gate.io | XRP-USDT | $0.9994 0.0002733 Eth | $326,891,191.00 133,228,544.026 XRP | 0.0004% |
57 | Binance | HBAR-USDT | $0.9994 0.0002733 Eth | $322,279,842.00 1,102,680,772.000 HBAR | 0.0034% |
58 | WhiteBIT | XRP-USDT | $0.9995 0.0002739 Eth | $318,517,613.00 135,915,728.680 XRP | 0.0004% |
59 | WhiteBIT | SOL-USDT | $0.9991 0.0002744 Eth | $307,023,925.00 1,481,609.501 SOL | 0.0000% |
60 | Hotcoin | ETH-USDT | $0.9993 0.0002732 Eth | $257,609,129.00 70,436.199 ETH | 0.0000% |
61 | OKX | SOL-USDT | $0.9991 0.0002733 Eth | $253,343,634.00 1,188,122.057 SOL | 0.0000% |
62 | Binance | LTC-USDT | $0.9994 0.0002733 Eth | $252,302,991.00 2,157,214.033 LTC | 0.0000% |
63 | KuCoin | XRP-USDT | $0.9994 0.0002733 Eth | $243,231,478.00 103,973,188.371 XRP | 0.0003% |
64 | Bybit | DOGE-USDT | $0.9994 0.0002733 Eth | $236,552,932.00 636,819,811.900 DOGE | 0.0019% |
65 | Binance | ENA-USDT | $0.9994 0.0002733 Eth | $234,178,090.00 214,438,662.760 ENA | 0.0007% |
66 | LBank | ETH-USDT | $0.9998 0.0002734 Eth | $224,544,184.00 61,358.151 ETH | 0.0000% |
67 | Biconomy.com | ETH-USDT | $0.9993 0.0002733 Eth | $224,150,942.00 59,042.480 ETH | 0.0000% |
68 | Binance | AVAX-USDT | $0.9998 0.0002735 Eth | $223,554,041.00 4,937,188.670 AVAX | 0.0000% |
69 | WhiteBIT | DOGE-USDT | $0.9995 0.0002734 Eth | $214,477,781.00 593,734,731.500 DOGE | 0.0018% |
70 | Hibt | BTC-USDT | $0.9994 0.0002733 Eth | $210,680,570.00 2,043.507 BTC | 0.0000% |
71 | Binance | PNUT-USDT | $0.9994 0.0002733 Eth | $210,494,155.00 223,611,728.200 PNUT | 0.0007% |
72 | HTX | ETH-USDT | $0.9994 0.0002733 Eth | $201,552,789.00 53,686.423 ETH | 0.0000% |
73 | Binance | AAVE-USDT | $1.00 0.0002743 Eth | $201,094,755.00 553,135.003 AAVE | 0.0000% |
74 | Binance | FTM-USDT | $0.9994 0.0002733 Eth | $186,781,621.00 152,660,974.000 FTM | 0.0005% |
75 | WEEX | SOL-USDT | $0.9986 0.0002737 Eth | $186,731,227.00 872,199.626 SOL | 0.0000% |
76 | MEXC | SOL-USDT | $0.9994 0.0002733 Eth | $181,850,730.00 872,880.090 SOL | 0.0000% |
77 | Toobit | XRP-USDT | $0.9997 0.0002734 Eth | $180,344,020.00 73,558,035.000 XRP | 0.0002% |
78 | Gate.io | DOGE-USDT | $0.9994 0.0002733 Eth | $178,961,915.00 480,527,163.360 DOGE | 0.0015% |
79 | LBank | SOL-USDT | $0.9998 0.0002734 Eth | $171,941,884.00 826,275.986 SOL | 0.0000% |
80 | Binance | NEIRO-USDT | $0.9994 0.0002733 Eth | $153,613,937.00 117,420,280,794.000 NEIRO | 0.3595% |
81 | Bybit | MNT-USDT | $0.9994 0.0002733 Eth | $153,571,438.00 132,895,334.850 MNT | 0.0004% |
82 | Binance | UNI-USDT | $0.9994 0.0002733 Eth | $149,973,560.00 9,467,688.890 UNI | 0.0000% |
83 | Binance | VANA-USDT | $0.9991 0.0002733 Eth | $148,896,617.00 8,909,980.300 VANA | 0.0000% |
84 | Binance | NEAR-USDT | $0.9994 0.0002733 Eth | $146,007,666.00 24,127,787.100 NEAR | 0.0001% |
85 | DigiFinex | DOGE-USDT | $0.9994 0.0002733 Eth | $145,640,817.00 403,051,810.180 DOGE | 0.0012% |
86 | Bitget | SOL-USDT | $0.9994 0.0002733 Eth | $143,124,665.00 671,643.720 SOL | 0.0000% |
87 | Bitget | SUI-USDT | $0.9994 0.0002733 Eth | $135,988,284.00 30,301,626.930 SUI | 0.0001% |
88 | Binance | ARB-USDT | $0.9994 0.0002733 Eth | $120,527,194.00 132,295,848.800 ARB | 0.0004% |
89 | WhiteBIT | LINK-USDT | $0.9993 0.0002733 Eth | $119,907,498.00 4,761,526.180 LINK | 0.0000% |
90 | Binance | DOT-USDT | $0.9998 0.0002738 Eth | $117,367,783.00 14,499,237.200 DOT | 0.0000% |
91 | BingX | BTC-USDT | $0.9994 0.0002733 Eth | $115,588,013.00 1,114.189 BTC | 0.0000% |
92 | LBank | DOGE-USDT | $0.9998 0.0002734 Eth | $109,143,247.00 302,488,582.000 DOGE | 0.0009% |
93 | WhiteBIT | ADA-USDT | $0.9993 0.0002733 Eth | $99,409,207.00 101,705,633.380 ADA | 0.0003% |
94 | OKX | PENGU-USDT | $0.9991 0.0002733 Eth | $99,297,494.00 2,912,238,639.000 PENGU | 0.0089% |
95 | OrangeX | DOGE-USDT | $0.9993 0.0002733 Eth | $99,220,437.00 265,973,801.000 DOGE | 0.0008% |
96 | KuCoin | SOL-USDT | $0.9994 0.0002733 Eth | $97,890,197.00 470,559.499 SOL | 0.0000% |
97 | Deepcoin | DOGE-USDT | $0.9993 0.0002733 Eth | $96,098,548.00 257,995,907.537 DOGE | 0.0008% |
98 | BingX | ETH-USDT | $0.9994 0.0002733 Eth | $94,484,877.00 24,882.630 ETH | 0.0000% |
99 | Gate.io | PEPE-USDT | $0.9994 0.0002733 Eth | $91,578,178.00 4,410,045,311,924.000 PEPE | 13.5029% |
100 | PointPay | BTC-USDT | $0.9993 0.0002733 Eth | $82,876,918.00 805.170 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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onstant":false,"inputs":[{"name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_blackListedUser","type":"address"}],"name":"destroyBlackFunds","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"inputs":[{"name":"_initialSupply","type":"uint256"},{"name":"_name","type":"string"},{"name":"_symbol","type":"string"},{"name":"_decimals","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"name":"amount","type":"uint256"}],"name":"Issue","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"amount","type":"uint256"}],"name":"Redeem","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"newAddress","type":"address"}],"name":"Deprecate","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"feeBasisPoints","type":"uint256"},{"indexed":false,"name":"maxFee","type":"uint256"}],"name":"Params","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"_blackListedUser","type":"address"},{"indexed":false,"name":"_balance","type":"uint256"}],"name":"DestroyedBlackFunds","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"_user","type":"address"}],"name":"AddedBlackList","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"_user","type":"address"}],"name":"RemovedBlackList","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"owner","type":"address"},{"indexed":true,"name":"spender","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"from","type":"address"},{"indexed":true,"name":"to","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[],"name":"Pause","type":"event"},{"anonymous":false,"inputs":[],"name":"Unpause","type":"event"}]
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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