Overview
Max Total Supply
76,926,220,145.483487 USDT
Holders
6,577,105 ( -0.010%)
Market
Price
$1.00 @ 0.000288 ETH (+0.04%)
Onchain Market Cap
$76,897,065,108.05
Circulating Supply Market Cap
$140,649,167,856.00
Other Info
Token Contract (WITH 6 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | BTC-USDT | $0.9996 0.0002880 Eth | $5,585,488,827.00 58,381.603 BTC | 0.0000% |
2 | Binance | ETH-USDT | $0.9994 0.0002880 Eth | $4,208,350,240.00 1,270,226.844 ETH | 0.0000% |
3 | BVOX | BTC-USDT | $0.9996 0.0002877 Eth | $4,181,550,763.00 43,696.324 BTC | 0.0000% |
4 | FameEX | BTC-USDT | $0.9991 0.0002879 Eth | $4,155,253,243.00 43,459.115 BTC | 0.0000% |
5 | Pionex | BTC-USDT | $0.9997 0.0002877 Eth | $3,780,186,014.00 39,418.561 BTC | 0.0000% |
6 | Ourbit | BTC-USDT | $0.9996 0.0002886 Eth | $3,416,402,494.00 35,699.528 BTC | 0.0000% |
7 | Bybit | BTC-USDT | $0.9994 0.0002880 Eth | $3,289,497,244.00 34,230.875 BTC | 0.0000% |
8 | Toobit | BTC-USDT | $1.00 0.0002880 Eth | $2,873,389,644.00 29,976.448 BTC | 0.0000% |
9 | FameEX | ETH-USDT | $0.9996 0.0002887 Eth | $2,857,974,596.00 862,297.163 ETH | 0.0000% |
10 | Tapbit | ETH-USDT | $0.9999 0.0002880 Eth | $2,709,514,885.00 815,525.812 ETH | 0.0000% |
11 | Toobit | ETH-USDT | $0.9994 0.0002880 Eth | $2,661,760,548.00 802,791.714 ETH | 0.0000% |
12 | WhiteBIT | BTC-USDT | $0.9996 0.0002888 Eth | $2,370,868,454.00 24,361.310 BTC | 0.0000% |
13 | Binance | XRP-USDT | $1.00 0.0002887 Eth | $2,337,801,922.00 1,077,175,950.000 XRP | 0.0076% |
14 | Binance | USDC-USDT | $1.00 0.0002880 Eth | $2,206,568,018.00 2,204,301,293.000 USDC | 0.0155% |
15 | CoinW | BTC-USDT | $0.9993 0.0002885 Eth | $2,188,064,811.00 22,523.591 BTC | 0.0000% |
16 | Pionex | ETH-USDT | $0.9996 0.0002878 Eth | $2,042,085,686.00 611,761.730 ETH | 0.0000% |
17 | Binance | DOGE-USDT | $1.00 0.0002880 Eth | $2,039,974,858.00 6,847,890,478.000 DOGE | 0.0481% |
18 | Bitget | BTC-USDT | $0.9994 0.0002880 Eth | $1,957,982,947.00 20,468.500 BTC | 0.0000% |
19 | OKX | BTC-USDT | $0.9996 0.0002880 Eth | $1,956,143,525.00 20,448.051 BTC | 0.0000% |
20 | BitMart | ETH-USDT | $0.9994 0.0002880 Eth | $1,941,650,658.00 559,679.027 ETH | 0.0000% |
21 | BitMart | BTC-USDT | $0.9994 0.0002880 Eth | $1,931,096,136.00 19,837.805 BTC | 0.0000% |
22 | MEXC | ETH-USDT | $0.999 0.0002883 Eth | $1,894,058,748.00 546,640.040 ETH | 0.0000% |
23 | BVOX | ETH-USDT | $0.9999 0.0002887 Eth | $1,832,642,951.00 552,098.137 ETH | 0.0000% |
24 | Bitget | ETH-USDT | $0.9994 0.0002880 Eth | $1,827,705,721.00 552,936.110 ETH | 0.0000% |
25 | MEXC | BTC-USDT | $0.9995 0.0002878 Eth | $1,770,954,498.00 18,183.038 BTC | 0.0000% |
26 | OKX | ETH-USDT | $0.9996 0.0002880 Eth | $1,741,269,750.00 527,812.154 ETH | 0.0000% |
27 | Bybit | ETH-USDT | $0.9994 0.0002880 Eth | $1,614,592,950.00 488,179.336 ETH | 0.0000% |
28 | DigiFinex | BTC-USDT | $0.9994 0.0002880 Eth | $1,445,708,885.00 14,847.882 BTC | 0.0000% |
29 | Ourbit | ETH-USDT | $0.9994 0.0002880 Eth | $1,416,383,075.00 424,694.594 ETH | 0.0000% |
30 | Gate.io | ETH-USDT | $0.9994 0.0002880 Eth | $1,350,467,660.00 410,303.746 ETH | 0.0000% |
31 | CoinW | ETH-USDT | $0.9995 0.0002878 Eth | $1,223,916,758.00 352,460.067 ETH | 0.0000% |
32 | Gate.io | BTC-USDT | $0.9994 0.0002880 Eth | $1,185,165,332.00 12,426.528 BTC | 0.0000% |
33 | Bitunix | BTC-USDT | $0.9996 0.0002877 Eth | $1,122,901,325.00 11,524.311 BTC | 0.0000% |
34 | Hotcoin | BTC-USDT | $0.9994 0.0002880 Eth | $1,117,937,970.00 11,480.972 BTC | 0.0000% |
35 | LBank | BTC-USDT | $1.00 0.0002878 Eth | $1,064,442,398.00 10,920.300 BTC | 0.0000% |
36 | OKX | DOGE-USDT | $0.9996 0.0002880 Eth | $1,061,350,132.00 3,561,548,810.490 DOGE | 0.0250% |
37 | Binance | USUAL-USDT | $0.9995 0.0002880 Eth | $1,053,286,345.00 760,489,627.000 USUAL | 0.0053% |
38 | XT.COM | BTC-USDT | $0.9995 0.0002878 Eth | $1,047,185,409.00 10,944.113 BTC | 0.0000% |
39 | Coinbase Exchange | USDT-USD | $0.9995 0.0002880 Eth | $1,033,433,974.00 1,033,950,949.260 USDT | 0.0073% |
40 | AscendEX (BitMax) | BTC-USDT | $0.9991 0.0002879 Eth | $949,469,308.00 9,754.216 BTC | 0.0000% |
41 | P2B | BTC-USDT | $0.9995 0.0002878 Eth | $881,760,995.00 9,056.472 BTC | 0.0000% |
42 | HTX | BTC-USDT | $0.9996 0.0002880 Eth | $788,523,415.00 8,210.631 BTC | 0.0000% |
43 | Binance | SUI-USDT | $0.9997 0.0002885 Eth | $780,240,805.00 191,960,639.000 SUI | 0.0013% |
44 | Bitunix | ETH-USDT | $0.9996 0.0002877 Eth | $754,077,649.00 217,041.477 ETH | 0.0000% |
45 | MEXC | DOGE-USDT | $0.9995 0.0002878 Eth | $729,092,769.00 2,253,234,787.330 DOGE | 0.0158% |
46 | LATOKEN | BTC-USDT | $0.9991 0.0002878 Eth | $690,925,506.00 7,096.621 BTC | 0.0000% |
47 | DigiFinex | ETH-USDT | $0.9994 0.0002880 Eth | $658,329,373.00 189,534.955 ETH | 0.0000% |
48 | BigONE | BTC-USDT | $1.00 0.0002878 Eth | $652,924,569.00 6,698.577 BTC | 0.0000% |
49 | WEEX | BTC-USDT | $0.9996 0.0002887 Eth | $635,357,459.00 6,642.404 BTC | 0.0000% |
50 | Binance | BNB-USDT | $0.9998 0.0002881 Eth | $625,430,428.00 956,686.832 BNB | 0.0000% |
51 | LATOKEN | ETH-USDT | $0.9996 0.0002878 Eth | $604,566,978.00 173,964.193 ETH | 0.0000% |
52 | Tapbit | BTC-USDT | $0.9995 0.0002878 Eth | $602,541,609.00 6,296.200 BTC | 0.0000% |
53 | Bybit | XRP-USDT | $0.9994 0.0002880 Eth | $581,752,535.00 268,753,687.560 XRP | 0.0019% |
54 | Bybit | SOL-USDT | $0.9994 0.0002880 Eth | $580,175,504.00 3,123,586.561 SOL | 0.0000% |
55 | Bitget | XRP-USDT | $0.9994 0.0002880 Eth | $569,030,836.00 263,559,835.850 XRP | 0.0019% |
56 | Bitget | DOGE-USDT | $0.9994 0.0002880 Eth | $564,398,366.00 1,908,010,815.277 DOGE | 0.0134% |
57 | FameEX | SOL-USDT | $0.9995 0.0002883 Eth | $549,619,439.00 2,944,452.567 SOL | 0.0000% |
58 | AscendEX (BitMax) | ETH-USDT | $0.9991 0.0002879 Eth | $528,784,881.00 152,413.187 ETH | 0.0000% |
59 | Binance | ADA-USDT | $0.9994 0.0002880 Eth | $495,360,143.00 581,748,840.700 ADA | 0.0041% |
60 | WhiteBIT | SOL-USDT | $1.00 0.0002878 Eth | $489,348,672.00 2,509,100.702 SOL | 0.0000% |
61 | Azbit | BTC-USDT | $0.9996 0.0002878 Eth | $462,605,320.00 4,850.136 BTC | 0.0000% |
62 | Gate.io | DOGE-USDT | $0.9994 0.0002880 Eth | $459,306,824.00 1,540,943,739.898 DOGE | 0.0108% |
63 | Bitget | BGB-USDT | $0.9994 0.0002880 Eth | $431,105,481.00 107,343,780.325 BGB | 0.0008% |
64 | Biconomy.com | BTC-USDT | $0.9996 0.0002877 Eth | $420,249,758.00 4,381.356 BTC | 0.0000% |
65 | Binance | ENA-USDT | $0.9991 0.0002879 Eth | $411,273,241.00 405,896,032.730 ENA | 0.0029% |
66 | FameEX | DOGE-USDT | $0.9991 0.0002879 Eth | $407,679,414.00 1,369,840,902.562 DOGE | 0.0096% |
67 | Gate.io | XRP-USDT | $0.9994 0.0002880 Eth | $399,661,587.00 184,435,554.608 XRP | 0.0013% |
68 | KuCoin | BTC-USDT | $0.9991 0.0002879 Eth | $398,596,502.00 4,095.351 BTC | 0.0000% |
69 | Bybit | DOGE-USDT | $0.9994 0.0002880 Eth | $387,251,003.00 1,312,331,624.800 DOGE | 0.0092% |
70 | BTSE | BTC-USDT | $0.9996 0.0002877 Eth | $385,753,663.00 3,960.254 BTC | 0.0000% |
71 | KuCoin | ETH-USDT | $0.9991 0.0002879 Eth | $382,523,979.00 110,287.746 ETH | 0.0000% |
72 | Binance | MOVE-USDT | $0.9994 0.0002880 Eth | $376,281,446.00 428,347,477.600 MOVE | 0.0030% |
73 | DigiFinex | DOGE-USDT | $0.9994 0.0002880 Eth | $373,638,653.00 1,151,609,605.280 DOGE | 0.0081% |
74 | Binance | HBAR-USDT | $0.9994 0.0002880 Eth | $369,922,294.00 1,414,105,461.000 HBAR | 0.0099% |
75 | Coinstore | ETH-USDT | $0.9997 0.0002881 Eth | $362,773,763.00 108,316.023 ETH | 0.0000% |
76 | OKX | SOL-USDT | $0.9996 0.0002880 Eth | $356,308,425.00 1,915,202.319 SOL | 0.0000% |
77 | WEEX | ETH-USDT | $0.9996 0.0002886 Eth | $349,738,702.00 105,690.014 ETH | 0.0000% |
78 | WhiteBIT | XRP-USDT | $1.00 0.0002878 Eth | $343,284,560.00 150,023,447.160 XRP | 0.0011% |
79 | MEXC | SOL-USDT | $0.9996 0.0002878 Eth | $336,895,882.00 1,727,998.790 SOL | 0.0000% |
80 | Hotcoin | ETH-USDT | $0.9996 0.0002877 Eth | $331,406,243.00 95,386.597 ETH | 0.0000% |
81 | OKX | XRP-USDT | $0.9996 0.0002880 Eth | $322,761,374.00 149,272,720.112 XRP | 0.0010% |
82 | Biconomy.com | ETH-USDT | $0.9996 0.0002877 Eth | $300,226,259.00 90,145.220 ETH | 0.0000% |
83 | WEEX | XRP-USDT | $0.9992 0.0002883 Eth | $299,886,124.00 131,947,448.184 XRP | 0.0009% |
84 | HTX | ETH-USDT | $0.9996 0.0002880 Eth | $285,477,890.00 85,461.457 ETH | 0.0000% |
85 | Kraken | USDT-USD | $0.9995 0.0002880 Eth | $283,998,991.00 284,132,532.801 USDT | 0.0020% |
86 | LBank | ETH-USDT | $0.9991 0.0002878 Eth | $270,638,040.00 78,029.765 ETH | 0.0000% |
87 | MEXC | SUI-USDT | $0.9996 0.0002885 Eth | $247,478,636.00 54,407,731.890 SUI | 0.0004% |
88 | Bitunix | DOGE-USDT | $0.9996 0.0002877 Eth | $229,318,990.00 706,857,700.000 DOGE | 0.0050% |
89 | Gate.io | PEPE-USDT | $0.9994 0.0002880 Eth | $227,078,181.00 13,998,661,791,392.200 PEPE | 98.3344% |
90 | Hibt | ETH-USDT | $0.9991 0.0002878 Eth | $226,457,824.00 68,673.456 ETH | 0.0000% |
91 | Bitget | SUI-USDT | $0.9994 0.0002880 Eth | $224,534,854.00 55,093,010.050 SUI | 0.0004% |
92 | Hibt | BTC-USDT | $0.9991 0.0002878 Eth | $223,287,768.00 2,334.964 BTC | 0.0000% |
93 | Binance | PNUT-USDT | $0.9994 0.0002880 Eth | $219,180,130.00 342,338,181.000 PNUT | 0.0024% |
94 | Coinstore | BTC-USDT | $0.9996 0.0002877 Eth | $210,741,332.00 2,188.857 BTC | 0.0000% |
95 | Azbit | XRP-USDT | $0.9997 0.0002883 Eth | $205,634,704.00 95,441,840.240 XRP | 0.0007% |
96 | Bitget | SOL-USDT | $0.9994 0.0002880 Eth | $204,212,146.00 1,095,616.287 SOL | 0.0000% |
97 | Binance | NEIRO-USDT | $0.9994 0.0002880 Eth | $196,503,472.00 206,055,189,562.000 NEIRO | 1.4474% |
98 | BYDFi | BTC-USDT | $0.9996 0.0002878 Eth | $186,025,952.00 1,910.831 BTC | 0.0000% |
99 | Binance | FTM-USDT | $0.9995 0.0002878 Eth | $176,189,144.00 189,600,910.000 FTM | 0.0013% |
100 | KuCoin | SOL-USDT | $0.9991 0.0002879 Eth | $157,143,674.00 807,871.095 SOL | 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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