Overview
Max Total Supply
76,926,220,145.483487 USDT
Holders
6,544,003 ( -0.038%)
Market
Price
$1.00 @ 0.000299 ETH (+0.01%)
Onchain Market Cap
$76,808,138,397.56
Circulating Supply Market Cap
$138,779,688,310.00
Other Info
Token Contract (WITH 6 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | OrangeX | BTC-USDT | $0.9986 0.0002990 Eth | $2,615,533,861.00 27,506.597 BTC | 0.0002% |
2 | Binance | BTC-USDT | $0.9986 0.0002990 Eth | $2,306,134,717.00 24,247.868 BTC | 0.0002% |
3 | Bybit | BTC-USDT | $0.9985 0.0002990 Eth | $2,257,671,571.00 23,705.015 BTC | 0.0002% |
4 | BVOX | BTC-USDT | $0.9984 0.0002991 Eth | $1,763,371,172.00 18,545.015 BTC | 0.0002% |
5 | Pionex | BTC-USDT | $0.9985 0.0002991 Eth | $1,726,489,186.00 18,166.586 BTC | 0.0002% |
6 | Ourbit | BTC-USDT | $0.9984 0.0002991 Eth | $1,367,958,800.00 14,385.483 BTC | 0.0001% |
7 | WhiteBIT | BTC-USDT | $0.9983 0.0002991 Eth | $1,340,570,046.00 14,199.453 BTC | 0.0001% |
8 | Toobit | BTC-USDT | $0.9985 0.0002991 Eth | $1,290,311,784.00 13,568.926 BTC | 0.0001% |
9 | Binance | ETH-USDT | $0.9985 0.0002991 Eth | $1,071,887,085.00 319,220.265 ETH | 0.0028% |
10 | OrangeX | ETH-USDT | $0.9984 0.0002991 Eth | $1,049,709,044.00 312,879.088 ETH | 0.0028% |
11 | MEXC | BTC-USDT | $0.9986 0.0002991 Eth | $937,646,231.00 9,924.954 BTC | 0.0001% |
12 | AscendEX (BitMax) | BTC-USDT | $0.9986 0.0002990 Eth | $935,185,996.00 9,900.800 BTC | 0.0001% |
13 | BitMart | BTC-USDT | $0.9989 0.0002991 Eth | $858,358,119.00 9,083.517 BTC | 0.0001% |
14 | FameEX | ETH-USDT | $0.9989 0.0002991 Eth | $803,920,644.00 239,315.625 ETH | 0.0021% |
15 | Pionex | ETH-USDT | $0.9989 0.0002991 Eth | $797,072,335.00 237,484.411 ETH | 0.0021% |
16 | Tapbit | ETH-USDT | $0.9986 0.0002991 Eth | $793,884,990.00 236,460.051 ETH | 0.0021% |
17 | CoinW | BTC-USDT | $0.9985 0.0002990 Eth | $788,394,479.00 8,347.051 BTC | 0.0001% |
18 | OKX | BTC-USDT | $0.9986 0.0002990 Eth | $769,460,310.00 8,084.212 BTC | 0.0001% |
19 | Toobit | ETH-USDT | $0.9985 0.0002991 Eth | $714,480,990.00 212,793.259 ETH | 0.0019% |
20 | Bitget | BTC-USDT | $0.9985 0.0002990 Eth | $686,928,244.00 7,218.203 BTC | 0.0001% |
21 | Binance | FDUSD-USDT | $0.9985 0.0002990 Eth | $682,710,456.00 682,790,000.000 FDUSD | 6.0198% |
22 | WEEX | ETH-USDT | $0.9986 0.0002990 Eth | $650,366,753.00 193,861.031 ETH | 0.0017% |
23 | DigiFinex | BTC-USDT | $0.9985 0.0002990 Eth | $578,123,601.00 6,119.739 BTC | 0.0001% |
24 | Bybit | ETH-USDT | $0.9985 0.0002990 Eth | $544,191,705.00 162,099.424 ETH | 0.0014% |
25 | WhiteBIT | ETH-USDT | $0.9985 0.0002990 Eth | $543,279,728.00 162,668.531 ETH | 0.0014% |
26 | P2B | BTC-USDT | $0.9986 0.0002991 Eth | $521,068,120.00 5,515.488 BTC | 0.0000% |
27 | MEXC | ETH-USDT | $0.9986 0.0002991 Eth | $519,725,284.00 155,610.734 ETH | 0.0014% |
28 | AscendEX (BitMax) | ETH-USDT | $0.9986 0.0002990 Eth | $509,360,711.00 152,401.920 ETH | 0.0013% |
29 | Hotcoin | BTC-USDT | $0.9985 0.0002991 Eth | $496,025,267.00 5,251.168 BTC | 0.0000% |
30 | BVOX | ETH-USDT | $0.9986 0.0002990 Eth | $488,862,875.00 145,650.634 ETH | 0.0013% |
31 | Bitget | ETH-USDT | $0.9985 0.0002990 Eth | $469,351,519.00 139,859.368 ETH | 0.0012% |
32 | LBank | BTC-USDT | $0.9985 0.0002991 Eth | $440,335,991.00 4,664.234 BTC | 0.0000% |
33 | Bitunix | BTC-USDT | $0.9986 0.0002990 Eth | $436,058,615.00 4,615.971 BTC | 0.0000% |
34 | HTX | BTC-USDT | $0.9985 0.0002990 Eth | $435,605,645.00 4,582.248 BTC | 0.0000% |
35 | OKX | ETH-USDT | $0.9986 0.0002990 Eth | $430,793,217.00 128,452.677 ETH | 0.0011% |
36 | Ourbit | ETH-USDT | $0.9986 0.0002991 Eth | $409,486,227.00 122,005.021 ETH | 0.0011% |
37 | Binance | SOL-USDT | $0.9985 0.0002990 Eth | $346,418,853.00 1,848,773.062 SOL | 0.0163% |
38 | CoinW | ETH-USDT | $0.9986 0.0002991 Eth | $343,665,241.00 102,905.284 ETH | 0.0009% |
39 | Gate.io | BTC-USDT | $0.9986 0.0002990 Eth | $333,608,770.00 3,505.920 BTC | 0.0000% |
40 | LATOKEN | BTC-USDT | $0.9985 0.0002991 Eth | $325,468,940.00 3,446.185 BTC | 0.0000% |
41 | Deepcoin | ETH-USDT | $0.9989 0.0002991 Eth | $312,660,135.00 94,638.509 ETH | 0.0008% |
42 | Binance | DOGE-USDT | $0.9988 0.0002991 Eth | $302,517,359.00 959,920,813.000 DOGE | 8.4631% |
43 | BTSE | BTC-USDT | $0.9985 0.0002990 Eth | $290,187,692.00 3,071.968 BTC | 0.0000% |
44 | Binance | GMT-USDT | $0.9985 0.0002990 Eth | $263,113,623.00 1,301,429,321.800 GMT | 11.4740% |
45 | BigONE | BTC-USDT | $0.9985 0.0002990 Eth | $262,738,396.00 2,781.440 BTC | 0.0000% |
46 | Binance | TRX-USDT | $0.9984 0.0002989 Eth | $254,448,258.00 978,696,009.700 TRX | 8.6286% |
47 | Biconomy.com | BTC-USDT | $0.9989 0.0002991 Eth | $230,450,453.00 2,422.012 BTC | 0.0000% |
48 | Binance | BNB-USDT | $0.9985 0.0002991 Eth | $213,328,078.00 306,704.774 BNB | 0.0027% |
49 | Gate.io | ETH-USDT | $0.9986 0.0002990 Eth | $208,094,940.00 62,048.681 ETH | 0.0005% |
50 | Binance | USUAL-USDT | $0.9985 0.0002990 Eth | $190,328,212.00 164,350,376.000 USUAL | 1.4490% |
51 | Bybit | XRP-USDT | $0.9985 0.0002990 Eth | $189,587,043.00 87,459,928.700 XRP | 0.7711% |
52 | KuCoin | BTC-USDT | $0.9984 0.0002990 Eth | $185,228,487.00 1,961.394 BTC | 0.0000% |
53 | Bitunix | ETH-USDT | $0.9986 0.0002990 Eth | $173,049,441.00 51,779.274 ETH | 0.0005% |
54 | DigiFinex | ETH-USDT | $0.9985 0.0002990 Eth | $171,622,654.00 51,361.612 ETH | 0.0005% |
55 | XT.COM | ETH-USDT | $0.9986 0.0002991 Eth | $171,115,551.00 50,954.518 ETH | 0.0004% |
56 | KuCoin | ETH-USDT | $0.9984 0.0002990 Eth | $167,987,413.00 50,297.582 ETH | 0.0004% |
57 | Bybit | SOL-USDT | $0.9985 0.0002990 Eth | $164,677,168.00 878,914.948 SOL | 0.0077% |
58 | LATOKEN | ETH-USDT | $0.9985 0.0002991 Eth | $158,378,659.00 47,484.313 ETH | 0.0004% |
59 | OKX | DOGE-USDT | $0.9986 0.0002990 Eth | $152,911,752.00 484,719,009.934 DOGE | 4.2735% |
60 | Coinstore | ETH-USDT | $0.9985 0.0002991 Eth | $148,164,699.00 44,168.485 ETH | 0.0004% |
61 | Hotcoin | ETH-USDT | $0.9985 0.0002991 Eth | $144,829,666.00 43,369.648 ETH | 0.0004% |
62 | Coinstore | BTC-USDT | $0.9985 0.0002991 Eth | $141,888,473.00 1,492.123 BTC | 0.0000% |
63 | Bitget | XRP-USDT | $0.9985 0.0002990 Eth | $135,306,853.00 62,432,655.642 XRP | 0.5504% |
64 | Biconomy.com | ETH-USDT | $0.9989 0.0002991 Eth | $121,842,510.00 36,295.431 ETH | 0.0003% |
65 | Binance | ZEN-USDT | $0.9984 0.0002989 Eth | $121,325,383.00 3,818,074.720 ZEN | 0.0337% |
66 | Bybit | MNT-USDT | $0.9985 0.0002990 Eth | $121,293,269.00 101,204,253.520 MNT | 0.8923% |
67 | Binance | HBAR-USDT | $0.9984 0.0002991 Eth | $120,821,564.00 429,288,141.000 HBAR | 3.7848% |
68 | Binance | ADA-USDT | $0.9985 0.0002990 Eth | $116,625,710.00 132,071,510.100 ADA | 1.1644% |
69 | DigiFinex | TRX-USDT | $0.9985 0.0002990 Eth | $113,660,923.00 436,305,845.100 TRX | 3.8467% |
70 | MEXC | DOGE-USDT | $0.9986 0.0002990 Eth | $108,976,785.00 347,289,726.450 DOGE | 3.0619% |
71 | BYDFi | BTC-USDT | $0.9985 0.0002990 Eth | $105,950,528.00 1,121.613 BTC | 0.0000% |
72 | BigONE | ETH-USDT | $0.9985 0.0002989 Eth | $103,061,950.00 30,876.865 ETH | 0.0003% |
73 | Binance | PENGU-USDT | $0.9985 0.0002990 Eth | $99,670,439.00 2,871,650,617.000 PENGU | 25.3178% |
74 | WhiteBIT | DOGE-USDT | $0.9985 0.0002990 Eth | $98,076,637.00 312,862,710.900 DOGE | 2.7583% |
75 | HTX | DOGE-USDT | $0.9985 0.0002990 Eth | $95,960,578.00 305,250,179.244 DOGE | 2.6912% |
76 | OKX | SOL-USDT | $0.9986 0.0002990 Eth | $94,099,348.00 502,167.549 SOL | 0.0044% |
77 | LBank | DOGE-USDT | $0.9985 0.0002990 Eth | $83,120,699.00 265,136,479.000 DOGE | 2.3376% |
78 | HTX | ETH-USDT | $0.9985 0.0002990 Eth | $82,559,168.00 24,634.387 ETH | 0.0002% |
79 | Dex-Trade | BTC-USDT | $0.9985 0.0002990 Eth | $80,923,535.00 856.774 BTC | 0.0000% |
80 | Binance | ENA-USDT | $0.9985 0.0002990 Eth | $80,476,445.00 85,679,679.720 ENA | 0.7554% |
81 | Bitget | SOL-USDT | $0.9985 0.0002990 Eth | $80,447,240.00 429,017.224 SOL | 0.0038% |
82 | Bitget | DOGE-USDT | $0.9985 0.0002990 Eth | $78,492,592.00 249,384,755.539 DOGE | 2.1987% |
83 | Bybit | VANA-USDT | $0.9985 0.0002990 Eth | $72,643,641.00 3,850,902.160 VANA | 0.0340% |
84 | Gate.io | XRP-USDT | $0.9986 0.0002990 Eth | $72,068,797.00 33,204,690.720 XRP | 0.2927% |
85 | KuCoin | XRP-USDT | $0.9984 0.0002990 Eth | $69,934,218.00 32,594,283.433 XRP | 0.2874% |
86 | Azbit | BTC-USDT | $0.9985 0.0002991 Eth | $69,272,052.00 728.403 BTC | 0.0000% |
87 | WhiteBIT | HBAR-USDT | $0.9985 0.0002990 Eth | $66,413,226.00 242,796,077.610 HBAR | 2.1406% |
88 | BingX | BTC-USDT | $0.9985 0.0002990 Eth | $64,069,704.00 673.099 BTC | 0.0000% |
89 | Bybit | VIRTUAL-USDT | $0.9985 0.0002990 Eth | $63,658,764.00 18,836,594.000 VIRTUAL | 0.1661% |
90 | Binance | FTM-USDT | $0.9984 0.0002990 Eth | $63,185,072.00 72,817,923.000 FTM | 0.6420% |
91 | Gate.io | DOGE-USDT | $0.9986 0.0002990 Eth | $61,917,087.00 196,367,687.620 DOGE | 1.7313% |
92 | Bybit | DOGE-USDT | $0.9985 0.0002990 Eth | $55,635,033.00 176,856,959.100 DOGE | 1.5592% |
93 | OKX | SUI-USDT | $0.9986 0.0002990 Eth | $54,570,878.00 13,003,217.066 SUI | 0.1146% |
94 | OKX | MOVE-USDT | $0.9986 0.0002990 Eth | $53,054,894.00 49,426,149.800 MOVE | 0.4358% |
95 | KuCoin | SOL-USDT | $0.9984 0.0002990 Eth | $51,129,403.00 277,029.672 SOL | 0.0024% |
96 | CoinW | DOGE-USDT | $0.9987 0.0002992 Eth | $49,810,762.00 158,872,341.384 DOGE | 1.4007% |
97 | Binance | ARB-USDT | $0.9985 0.0002991 Eth | $48,146,970.00 62,588,242.900 ARB | 0.5518% |
98 | WEEX | SUI-USDT | $0.9986 0.0002990 Eth | $47,761,538.00 11,356,479.000 SUI | 0.1001% |
99 | BingX | ETH-USDT | $0.9985 0.0002990 Eth | $42,324,317.00 12,612.116 ETH | 0.0001% |
100 | PointPay | BTC-USDT | $0.9985 0.0002991 Eth | $38,007,009.00 399.705 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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