Overview
Max Total Supply
76,928,104,353.364467 USDT
Holders
6,550,316 ( -0.019%)
Market
Price
$1.00 @ 0.000260 ETH (-0.01%)
Onchain Market Cap
$76,920,488,471.03
Circulating Supply Market Cap
$140,243,378,624.00
Other Info
Token Contract (WITH 6 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | BTC-USDT | $0.9999 0.0002592 Eth | $1,390,549,695.00 13,685.198 BTC | 0.0000% |
2 | MEXC | BTC-USDT | $0.9999 0.0002592 Eth | $1,291,184,580.00 12,695.571 BTC | 0.0000% |
3 | CoinW | BTC-USDT | $0.9999 0.0002587 Eth | $1,137,289,901.00 11,172.669 BTC | 0.0000% |
4 | BVOX | BTC-USDT | $0.9999 0.0002588 Eth | $1,090,999,296.00 10,738.391 BTC | 0.0000% |
5 | Binance | FDUSD-USDT | $0.9998 0.0002581 Eth | $1,011,621,792.00 1,010,210,118.000 FDUSD | 0.0078% |
6 | Binance | ETH-USDT | $0.9997 0.0002585 Eth | $964,252,859.00 248,901.542 ETH | 0.0000% |
7 | AscendEX (BitMax) | BTC-USDT | $0.9992 0.0002589 Eth | $942,758,100.00 9,274.984 BTC | 0.0000% |
8 | MEXC | ETH-USDT | $0.9999 0.0002592 Eth | $871,265,127.00 226,508.000 ETH | 0.0000% |
9 | Ourbit | BTC-USDT | $0.9999 0.0002587 Eth | $822,883,076.00 8,098.261 BTC | 0.0000% |
10 | Toobit | BTC-USDT | $0.9992 0.0002589 Eth | $795,308,957.00 7,823.875 BTC | 0.0000% |
11 | Tapbit | ETH-USDT | $0.9999 0.0002592 Eth | $770,114,385.00 198,767.109 ETH | 0.0000% |
12 | Binance | XRP-USDT | $0.9997 0.0002587 Eth | $666,809,192.00 276,239,566.000 XRP | 0.0021% |
13 | Bybit | ETH-USDT | $0.9999 0.0002592 Eth | $662,289,403.00 170,815.274 ETH | 0.0000% |
14 | Toobit | ETH-USDT | $0.9999 0.0002587 Eth | $655,013,072.00 169,030.738 ETH | 0.0000% |
15 | DigiFinex | BTC-USDT | $0.999 0.0002590 Eth | $573,834,416.00 5,645.641 BTC | 0.0000% |
16 | Binance | DOGE-USDT | $0.9998 0.0002584 Eth | $563,725,913.00 1,419,794,166.000 DOGE | 0.0109% |
17 | WhiteBIT | BTC-USDT | $0.9998 0.0002587 Eth | $542,368,081.00 5,324.945 BTC | 0.0000% |
18 | AscendEX (BitMax) | ETH-USDT | $0.9992 0.0002589 Eth | $508,780,957.00 132,375.822 ETH | 0.0000% |
19 | WEEX | BTC-USDT | $0.9999 0.0002592 Eth | $469,428,425.00 4,625.100 BTC | 0.0000% |
20 | Binance | SOL-USDT | $0.9998 0.0002584 Eth | $462,393,176.00 2,097,561.767 SOL | 0.0000% |
21 | Bitget | BTC-USDT | $0.9999 0.0002592 Eth | $397,017,316.00 3,904.797 BTC | 0.0000% |
22 | DigiFinex | ETH-USDT | $0.999 0.0002590 Eth | $382,094,667.00 99,426.334 ETH | 0.0000% |
23 | P2B | ETH-USDT | $0.9999 0.0002588 Eth | $376,194,760.00 97,473.306 ETH | 0.0000% |
24 | Azbit | BTC-USDT | $0.9998 0.0002587 Eth | $373,077,429.00 3,674.511 BTC | 0.0000% |
25 | WEEX | ETH-USDT | $0.9998 0.0002588 Eth | $367,692,826.00 94,944.864 ETH | 0.0000% |
26 | OKX | BTC-USDT | $0.9999 0.0002592 Eth | $366,152,619.00 3,599.772 BTC | 0.0000% |
27 | Deepcoin | ETH-USDT | $0.9999 0.0002586 Eth | $346,287,816.00 87,937.463 ETH | 0.0000% |
28 | Ourbit | ETH-USDT | $0.9998 0.0002581 Eth | $345,308,915.00 89,074.622 ETH | 0.0000% |
29 | CoinW | ETH-USDT | $0.9999 0.0002593 Eth | $344,739,464.00 89,626.385 ETH | 0.0000% |
30 | BitMart | BTC-USDT | $0.9998 0.0002587 Eth | $340,899,134.00 3,347.848 BTC | 0.0000% |
31 | WhiteBIT | ETH-USDT | $0.9998 0.0002587 Eth | $338,940,995.00 87,696.721 ETH | 0.0000% |
32 | OrangeX | ETH-USDT | $0.9999 0.0002588 Eth | $316,199,188.00 81,474.414 ETH | 0.0000% |
33 | XT.COM | BTC-USDT | $0.9997 0.0002589 Eth | $315,131,092.00 3,101.815 BTC | 0.0000% |
34 | Bitunix | BTC-USDT | $0.9999 0.0002587 Eth | $305,343,089.00 2,998.064 BTC | 0.0000% |
35 | Hotcoin | BTC-USDT | $0.9999 0.0002587 Eth | $304,211,375.00 2,986.951 BTC | 0.0000% |
36 | Binance | LINK-USDT | $0.9997 0.0002585 Eth | $287,131,725.00 9,688,610.610 LINK | 0.0001% |
37 | BitMart | ETH-USDT | $0.9998 0.0002587 Eth | $282,071,300.00 73,056.273 ETH | 0.0000% |
38 | LBank | BTC-USDT | $0.9999 0.0002587 Eth | $278,389,611.00 2,733.235 BTC | 0.0000% |
39 | XT.COM | ETH-USDT | $0.9998 0.0002585 Eth | $268,067,681.00 69,189.324 ETH | 0.0000% |
40 | Binance | PEPE-USDT | $0.9997 0.0002587 Eth | $267,974,059.00 11,433,093,103,958.000 PEPE | 87.9110% |
41 | Binance | ENA-USDT | $0.9994 0.0002588 Eth | $260,113,422.00 236,931,039.440 ENA | 0.0018% |
42 | Binance | FLOKI-USDT | $1.00 0.0002582 Eth | $247,829,775.00 1,042,710,051,482.000 FLOKI | 8.0176% |
43 | Binance | SUI-USDT | $0.9999 0.0002587 Eth | $219,016,413.00 48,585,022.600 SUI | 0.0004% |
44 | Coinbase Exchange | USDT-USD | $0.9998 0.0002592 Eth | $196,595,039.00 196,636,332.420 USDT | 0.0015% |
45 | Binance | BNB-USDT | $0.9998 0.0002584 Eth | $193,905,851.00 271,296.543 BNB | 0.0000% |
46 | Binance | TRX-USDT | $0.9998 0.0002580 Eth | $188,195,010.00 660,798,271.100 TRX | 0.0051% |
47 | Bitunix | ETH-USDT | $0.9999 0.0002587 Eth | $185,790,238.00 48,144.074 ETH | 0.0000% |
48 | Biconomy.com | BTC-USDT | $0.9999 0.0002586 Eth | $179,735,898.00 1,769.802 BTC | 0.0000% |
49 | Gate.io | BTC-USDT | $0.9992 0.0002589 Eth | $174,648,553.00 1,719.722 BTC | 0.0000% |
50 | Bybit | XRP-USDT | $0.9999 0.0002592 Eth | $169,588,296.00 70,213,653.260 XRP | 0.0005% |
51 | Bitget | XRP-USDT | $0.9999 0.0002592 Eth | $168,190,267.00 69,642,170.126 XRP | 0.0005% |
52 | HTX | BTC-USDT | $0.9992 0.0002589 Eth | $167,570,524.00 1,650.372 BTC | 0.0000% |
53 | LBank | ETH-USDT | $0.9994 0.0002588 Eth | $160,445,693.00 41,741.737 ETH | 0.0000% |
54 | LATOKEN | BTC-USDT | $0.9997 0.0002589 Eth | $160,083,759.00 1,573.798 BTC | 0.0000% |
55 | Gate.io | ETH-USDT | $0.9992 0.0002589 Eth | $160,042,674.00 41,378.263 ETH | 0.0000% |
56 | BigONE | BTC-USDT | $0.9999 0.0002588 Eth | $159,338,753.00 1,563.267 BTC | 0.0000% |
57 | Binance | ACT-USDT | $0.999 0.0002590 Eth | $157,117,052.00 266,043,638.400 ACT | 0.0020% |
58 | Bybit | SOL-USDT | $0.9999 0.0002592 Eth | $156,527,294.00 710,063.315 SOL | 0.0000% |
59 | Binance | AAVE-USDT | $0.999 0.0002590 Eth | $155,028,366.00 416,489.221 AAVE | 0.0000% |
60 | WhiteBIT | XRP-USDT | $0.9999 0.0002587 Eth | $138,102,603.00 57,409,214.690 XRP | 0.0004% |
61 | Bitget | STETH-USDT | $0.9999 0.0002592 Eth | $136,807,389.00 35,284.076 STETH | 0.0000% |
62 | Biconomy.com | ETH-USDT | $0.9998 0.0002587 Eth | $131,931,585.00 34,039.679 ETH | 0.0000% |
63 | Kraken | USDT-USD | $0.9999 0.0002592 Eth | $122,874,623.00 122,893,056.798 USDT | 0.0009% |
64 | Binance | CRV-USDT | $0.999 0.0002590 Eth | $122,724,978.00 104,003,826.900 CRV | 0.0008% |
65 | Binance | AVAX-USDT | $0.9998 0.0002580 Eth | $122,099,872.00 2,401,053.700 AVAX | 0.0000% |
66 | KuCoin | BTC-USDT | $0.9992 0.0002589 Eth | $121,321,664.00 1,193.480 BTC | 0.0000% |
67 | WhiteBIT | SOL-USDT | $1.00 0.0002587 Eth | $118,253,023.00 544,208.437 SOL | 0.0000% |
68 | Gate.io | FLOKI-USDT | $0.9994 0.0002588 Eth | $115,377,823.00 480,714,032,824.000 FLOKI | 3.6963% |
69 | KuCoin | ETH-USDT | $0.9992 0.0002589 Eth | $112,716,172.00 29,322.794 ETH | 0.0000% |
70 | OKX | SOL-USDT | $0.9999 0.0002593 Eth | $109,554,125.00 497,081.566 SOL | 0.0000% |
71 | WhiteBIT | LINK-USDT | $0.9997 0.0002585 Eth | $109,336,037.00 3,769,422.250 LINK | 0.0000% |
72 | Gate.io | ENA-USDT | $0.9999 0.0002592 Eth | $108,902,486.00 100,637,756.580 ENA | 0.0008% |
73 | MEXC | DOGE-USDT | $0.9998 0.0002580 Eth | $108,671,799.00 273,714,406.740 DOGE | 0.0021% |
74 | Binance | HBAR-USDT | $0.9998 0.0002584 Eth | $103,630,571.00 351,178,752.000 HBAR | 0.0027% |
75 | LBank | DOGE-USDT | $0.9998 0.0002580 Eth | $101,327,726.00 255,298,669.000 DOGE | 0.0020% |
76 | WhiteBIT | DOGE-USDT | $1.00 0.0002587 Eth | $100,001,582.00 252,564,478.000 DOGE | 0.0019% |
77 | Binance | UNI-USDT | $0.9998 0.0002587 Eth | $99,232,793.00 5,923,505.430 UNI | 0.0000% |
78 | Hotcoin | ETH-USDT | $0.9999 0.0002587 Eth | $98,190,764.00 25,443.184 ETH | 0.0000% |
79 | Bybit | MNT-USDT | $0.9999 0.0002592 Eth | $98,012,731.00 80,014,892.070 MNT | 0.0006% |
80 | Fastex | BTC-USDT | $0.9992 0.0002589 Eth | $95,572,818.00 940.184 BTC | 0.0000% |
81 | Binance | PNUT-USDT | $0.9999 0.0002587 Eth | $95,389,364.00 82,881,424.800 PNUT | 0.0006% |
82 | BigONE | ETH-USDT | $0.9994 0.0002588 Eth | $92,876,353.00 24,153.525 ETH | 0.0000% |
83 | Gate.io | DOGE-USDT | $0.9992 0.0002589 Eth | $91,889,798.00 231,299,240.440 DOGE | 0.0018% |
84 | DigiFinex | DOGE-USDT | $0.999 0.0002590 Eth | $89,365,298.00 226,727,381.420 DOGE | 0.0017% |
85 | Binance | DOT-USDT | $0.9998 0.0002584 Eth | $88,658,167.00 10,259,186.480 DOT | 0.0001% |
86 | Bybit | DOGE-USDT | $0.9999 0.0002592 Eth | $87,117,342.00 219,624,966.100 DOGE | 0.0017% |
87 | Binance | AVA-USDT | $0.9997 0.0002585 Eth | $84,445,910.00 37,564,859.200 AVA | 0.0003% |
88 | HTX | DOGE-USDT | $0.9992 0.0002589 Eth | $82,997,784.00 209,000,322.519 DOGE | 0.0016% |
89 | Bitget | SOL-USDT | $0.9999 0.0002592 Eth | $74,517,337.00 337,361.828 SOL | 0.0000% |
90 | Binance | ARB-USDT | $0.9997 0.0002585 Eth | $70,090,021.00 70,796,753.700 ARB | 0.0005% |
91 | Bitunix | DOGE-USDT | $0.9999 0.0002587 Eth | $68,053,206.00 171,945,857.000 DOGE | 0.0013% |
92 | Binance | NEIRO-USDT | $0.9998 0.0002584 Eth | $67,008,865.00 41,402,931,076.000 NEIRO | 0.3184% |
93 | Gate.io | SUI-USDT | $0.9997 0.0002589 Eth | $66,976,053.00 14,868,146.180 SUI | 0.0001% |
94 | Bitunix | XRP-USDT | $0.9999 0.0002587 Eth | $65,831,325.00 27,298,084.000 XRP | 0.0002% |
95 | Deepcoin | DOGE-USDT | $0.9999 0.0002587 Eth | $59,629,126.00 149,849,681.783 DOGE | 0.0012% |
96 | BYDFi | BTC-USDT | $0.9999 0.0002587 Eth | $57,771,892.00 567.297 BTC | 0.0000% |
97 | Dex-Trade | BTC-USDT | $0.9998 0.0002587 Eth | $53,384,620.00 524.499 BTC | 0.0000% |
98 | WhiteBIT | ADA-USDT | $0.9999 0.0002586 Eth | $52,655,711.00 49,929,960.770 ADA | 0.0004% |
99 | BingX | ETH-USDT | $0.9999 0.0002592 Eth | $45,196,417.00 11,658.862 ETH | 0.0000% |
100 | BingX | BTC-USDT | $0.9999 0.0002592 Eth | $39,883,373.00 392.540 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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