Feature Tip: Add private address tag to any address under My Name Tag !
Overview
Max Total Supply
69,929,452,093.657795 USDT
Holders
6,421,622 ( -0.004%)
Market
Price
$1.00 @ 0.000293 ETH (+0.01%)
Onchain Market Cap
$69,999,381,545.75
Circulating Supply Market Cap
$132,664,069,591.00
Other Info
Token Contract (WITH 6 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | BTC-USDT | $0.9997 0.0002933 Eth | $5,344,896,099.00 57,731.802 BTC | 0.0000% |
2 | Pionex | BTC-USDT | $0.9997 0.0002935 Eth | $4,375,576,595.00 47,252.315 BTC | 0.0000% |
3 | BVOX | BTC-USDT | $0.9996 0.0002934 Eth | $4,028,657,765.00 43,513.070 BTC | 0.0000% |
4 | FameEX | BTC-USDT | $0.9996 0.0002935 Eth | $3,969,509,424.00 42,850.681 BTC | 0.0000% |
5 | Bybit | BTC-USDT | $0.9996 0.0002934 Eth | $3,704,648,726.00 39,974.789 BTC | 0.0000% |
6 | Ourbit | BTC-USDT | $0.9994 0.0002941 Eth | $3,202,953,961.00 34,604.195 BTC | 0.0000% |
7 | WEEX | BTC-USDT | $0.9997 0.0002936 Eth | $3,202,177,499.00 34,576.043 BTC | 0.0000% |
8 | Toobit | BTC-USDT | $0.9994 0.0002941 Eth | $2,703,604,602.00 29,206.001 BTC | 0.0000% |
9 | WhiteBIT | BTC-USDT | $0.9996 0.0002934 Eth | $2,562,436,251.00 27,633.590 BTC | 0.0000% |
10 | Hotcoin | BTC-USDT | $0.9996 0.0002935 Eth | $2,196,901,477.00 23,701.265 BTC | 0.0000% |
11 | DigiFinex | BTC-USDT | $0.9996 0.0002934 Eth | $2,087,255,666.00 22,510.254 BTC | 0.0000% |
12 | Binance | USDC-USDT | $0.9997 0.0002935 Eth | $1,871,679,144.00 1,872,157,726.000 USDC | 0.0062% |
13 | BitMart | BTC-USDT | $0.9996 0.0002935 Eth | $1,815,523,249.00 19,585.479 BTC | 0.0000% |
14 | Pionex | ETH-USDT | $1.001 0.0002947 Eth | $1,630,476,836.00 487,867.768 ETH | 0.0000% |
15 | Tapbit | ETH-USDT | $0.9995 0.0002945 Eth | $1,629,579,193.00 488,394.857 ETH | 0.0000% |
16 | Binance | DOGE-USDT | $0.9997 0.0002935 Eth | $1,515,981,248.00 3,955,244,977.000 DOGE | 0.0131% |
17 | Bitunix | BTC-USDT | $0.9996 0.0002936 Eth | $1,439,694,199.00 15,524.604 BTC | 0.0000% |
18 | Deepcoin | BTC-USDT | $1.001 0.0002940 Eth | $1,359,046,218.00 14,797.735 BTC | 0.0000% |
19 | Binance | SOL-USDT | $1.00 0.0002935 Eth | $1,172,500,030.00 5,096,543.873 SOL | 0.0000% |
20 | Binance | FDUSD-USDT | $0.9996 0.0002935 Eth | $1,075,386,786.00 1,078,583,196.000 FDUSD | 0.0036% |
21 | CoinW | ETH-USDT | $0.9997 0.0002936 Eth | $1,044,391,725.00 306,476.076 ETH | 0.0000% |
22 | BVOX | ETH-USDT | $0.9996 0.0002935 Eth | $1,040,359,504.00 311,679.836 ETH | 0.0000% |
23 | AscendEX (BitMax) | BTC-USDT | $1.00 0.0002935 Eth | $940,875,357.00 10,143.245 BTC | 0.0000% |
24 | BitMart | ETH-USDT | $0.9996 0.0002935 Eth | $938,223,527.00 275,249.448 ETH | 0.0000% |
25 | Bybit | ETH-USDT | $0.9996 0.0002934 Eth | $891,854,471.00 267,334.780 ETH | 0.0000% |
26 | LBank | BTC-USDT | $0.9996 0.0002935 Eth | $843,802,453.00 9,102.179 BTC | 0.0000% |
27 | DigiFinex | ETH-USDT | $0.9996 0.0002934 Eth | $829,652,301.00 243,140.074 ETH | 0.0000% |
28 | LATOKEN | BTC-USDT | $0.9997 0.0002935 Eth | $751,653,988.00 8,110.376 BTC | 0.0000% |
29 | HTX | BTC-USDT | $0.9997 0.0002933 Eth | $731,913,115.00 7,900.765 BTC | 0.0000% |
30 | Ourbit | ETH-USDT | $0.9997 0.0002936 Eth | $707,126,496.00 211,762.952 ETH | 0.0000% |
31 | Hotcoin | ETH-USDT | $0.9997 0.0002936 Eth | $691,553,251.00 202,902.984 ETH | 0.0000% |
32 | XT.COM | ETH-USDT | $1.00 0.0002935 Eth | $643,936,579.00 192,851.468 ETH | 0.0000% |
33 | BigONE | BTC-USDT | $0.9996 0.0002949 Eth | $636,283,487.00 6,873.862 BTC | 0.0000% |
34 | OKX | DOGE-USDT | $1.00 0.0002935 Eth | $630,376,083.00 1,646,320,264.003 DOGE | 0.0055% |
35 | WhiteBIT | ETH-USDT | $1.001 0.0002940 Eth | $617,807,767.00 181,413.108 ETH | 0.0000% |
36 | OKX | ETH-USDT | $1.00 0.0002935 Eth | $608,141,086.00 182,009.794 ETH | 0.0000% |
37 | MEXC | BTC-USDT | $0.9999 0.0002947 Eth | $557,051,414.00 6,015.563 BTC | 0.0000% |
38 | Bitunix | ETH-USDT | $0.9996 0.0002936 Eth | $553,227,074.00 162,305.570 ETH | 0.0000% |
39 | Binance | PEPE-USDT | $0.9997 0.0002937 Eth | $542,843,145.00 30,015,292,233,624.000 PEPE | 99.6171% |
40 | Binance | BNB-USDT | $1.00 0.0002935 Eth | $530,974,180.00 857,584.119 BNB | 0.0000% |
41 | Binance | XLM-USDT | $0.9997 0.0002935 Eth | $502,111,022.00 1,127,814,567.000 XLM | 0.0037% |
42 | Binance | SUI-USDT | $0.9996 0.0002934 Eth | $459,222,482.00 139,446,674.300 SUI | 0.0005% |
43 | OrangeX | ETH-USDT | $0.9997 0.0002935 Eth | $434,205,643.00 129,954.649 ETH | 0.0000% |
44 | Bitget | XRP-USDT | $0.9996 0.0002934 Eth | $409,855,086.00 299,562,803.084 XRP | 0.0010% |
45 | Bybit | XRP-USDT | $0.9996 0.0002934 Eth | $407,774,229.00 298,616,535.220 XRP | 0.0010% |
46 | Azbit | BTC-USDT | $1.001 0.0002940 Eth | $405,908,878.00 4,375.534 BTC | 0.0000% |
47 | Coinstore | BTC-USDT | $0.9998 0.0002938 Eth | $384,124,878.00 4,147.051 BTC | 0.0000% |
48 | LATOKEN | ETH-USDT | $1.001 0.0002947 Eth | $372,651,957.00 109,498.206 ETH | 0.0000% |
49 | LBank | ETH-USDT | $0.9995 0.0002935 Eth | $362,568,304.00 106,392.389 ETH | 0.0000% |
50 | KuCoin | BTC-USDT | $0.9997 0.0002933 Eth | $359,671,305.00 3,878.361 BTC | 0.0000% |
51 | FameEX | SOL-USDT | $0.9996 0.0002934 Eth | $358,323,926.00 1,557,993.649 SOL | 0.0000% |
52 | Hotcoin | DOGE-USDT | $0.9997 0.0002936 Eth | $335,139,228.00 857,928,671.325 DOGE | 0.0028% |
53 | Gate.io | ETH-USDT | $0.9996 0.0002935 Eth | $327,886,137.00 98,229.444 ETH | 0.0000% |
54 | Bitget | DOGE-USDT | $0.9996 0.0002934 Eth | $320,734,431.00 837,350,987.002 DOGE | 0.0028% |
55 | Gate.io | BTC-USDT | $0.9996 0.0002935 Eth | $305,123,445.00 3,297.002 BTC | 0.0000% |
56 | FameEX | DOGE-USDT | $0.9997 0.0002935 Eth | $303,510,675.00 791,930,676.022 DOGE | 0.0026% |
57 | Bitget | BTC-USDT | $0.9996 0.0002934 Eth | $302,086,658.00 3,261.398 BTC | 0.0000% |
58 | Bybit | SOL-USDT | $0.9996 0.0002934 Eth | $290,696,758.00 1,265,787.747 SOL | 0.0000% |
59 | WhiteBIT | SOL-USDT | $0.9996 0.0002935 Eth | $271,312,020.00 1,180,648.189 SOL | 0.0000% |
60 | Binance | PNUT-USDT | $0.9996 0.0002934 Eth | $270,420,789.00 248,915,994.600 PNUT | 0.0008% |
61 | Binance | AVAX-USDT | $0.9994 0.0002941 Eth | $262,269,202.00 6,336,538.690 AVAX | 0.0000% |
62 | OKX | SOL-USDT | $1.00 0.0002935 Eth | $254,980,347.00 1,109,172.899 SOL | 0.0000% |
63 | MEXC | DOGE-USDT | $0.9996 0.0002935 Eth | $247,798,768.00 634,010,477.180 DOGE | 0.0021% |
64 | Binance | SEI-USDT | $0.9997 0.0002935 Eth | $242,705,108.00 369,640,047.200 SEI | 0.0012% |
65 | Bitunix | DOGE-USDT | $0.9996 0.0002936 Eth | $232,378,758.00 595,404,552.000 DOGE | 0.0020% |
66 | Coinstore | ETH-USDT | $0.9997 0.0002935 Eth | $231,102,898.00 69,101.601 ETH | 0.0000% |
67 | WEEX | DOGE-USDT | $0.9998 0.0002944 Eth | $230,566,323.00 596,154,711.580 DOGE | 0.0020% |
68 | Biconomy.com | ETH-USDT | $0.9997 0.0002936 Eth | $227,039,209.00 68,010.496 ETH | 0.0000% |
69 | WEEX | SOL-USDT | $0.9996 0.0002949 Eth | $226,285,612.00 984,104.838 SOL | 0.0000% |
70 | Deepcoin | SOL-USDT | $0.9997 0.0002935 Eth | $219,710,561.00 950,325.248 SOL | 0.0000% |
71 | Bybit | DOGE-USDT | $0.9996 0.0002934 Eth | $218,972,364.00 572,278,697.100 DOGE | 0.0019% |
72 | OKX | XRP-USDT | $1.00 0.0002935 Eth | $215,057,947.00 156,740,711.844 XRP | 0.0005% |
73 | DigiFinex | DOGE-USDT | $0.9996 0.0002934 Eth | $208,571,658.00 533,389,446.340 DOGE | 0.0018% |
74 | Kraken | USDT-USD | $0.9996 0.0002933 Eth | $200,806,147.00 200,886,501.697 USDT | 0.0007% |
75 | Binance | TIA-USDT | $1.00 0.0002935 Eth | $198,120,634.00 24,950,744.020 TIA | 0.0001% |
76 | Gate.io | DOGE-USDT | $0.9996 0.0002935 Eth | $193,046,472.00 504,366,090.300 DOGE | 0.0017% |
77 | BTSE | ETH-USDT | $0.9995 0.0002935 Eth | $189,935,065.00 55,734.563 ETH | 0.0000% |
78 | Dex-Trade | BTC-USDT | $1.00 0.0002935 Eth | $189,312,617.00 2,040.632 BTC | 0.0000% |
79 | KuCoin | ETH-USDT | $0.9997 0.0002933 Eth | $188,961,387.00 55,370.601 ETH | 0.0000% |
80 | HTX | ETH-USDT | $0.9997 0.0002933 Eth | $188,014,995.00 56,319.802 ETH | 0.0000% |
81 | Bitget | ETH-USDT | $0.9996 0.0002934 Eth | $180,178,057.00 53,994.089 ETH | 0.0000% |
82 | Gate.io | XRP-USDT | $0.9996 0.0002935 Eth | $179,220,359.00 130,774,573.333 XRP | 0.0004% |
83 | LBank | SOL-USDT | $0.9997 0.0002935 Eth | $178,905,414.00 778,335.881 SOL | 0.0000% |
84 | OrangeX | DOGE-USDT | $0.9997 0.0002935 Eth | $177,814,942.00 464,146,750.000 DOGE | 0.0015% |
85 | Deepcoin | XRP-USDT | $0.9996 0.0002942 Eth | $171,909,469.00 126,887,707.664 XRP | 0.0004% |
86 | Binance | NEAR-USDT | $1.00 0.0002935 Eth | $169,103,625.00 27,010,488.600 NEAR | 0.0001% |
87 | WhiteBIT | DOGE-USDT | $0.9996 0.0002935 Eth | $163,105,776.00 417,216,055.700 DOGE | 0.0014% |
88 | Binance | NEIRO-USDT | $0.9997 0.0002935 Eth | $162,677,328.00 95,187,083,105.000 NEIRO | 0.3159% |
89 | Deepcoin | DOGE-USDT | $0.9996 0.0002935 Eth | $153,567,022.00 402,416,527.261 DOGE | 0.0013% |
90 | Binance | ARB-USDT | $0.9996 0.0002945 Eth | $151,767,324.00 174,036,770.900 ARB | 0.0006% |
91 | Bitunix | SOL-USDT | $0.9996 0.0002936 Eth | $150,357,083.00 654,791.293 SOL | 0.0000% |
92 | WhiteBIT | TRX-USDT | $0.9991 0.0002946 Eth | $135,688,776.00 692,386,250.840 TRX | 0.0023% |
93 | WhiteBIT | ADA-USDT | $0.9998 0.0002945 Eth | $134,482,365.00 141,002,181.230 ADA | 0.0005% |
94 | Bybit | MNT-USDT | $0.9997 0.0002933 Eth | $126,636,109.00 157,253,280.550 MNT | 0.0005% |
95 | Slex | BTC-USDT | $0.9996 0.0002936 Eth | $126,386,721.00 1,364.758 BTC | 0.0000% |
96 | Bitget | BGB-USDT | $0.9996 0.0002934 Eth | $123,261,614.00 78,414,296.514 BGB | 0.0003% |
97 | Bitget | SOL-USDT | $0.9996 0.0002934 Eth | $116,923,003.00 508,096.261 SOL | 0.0000% |
98 | WhiteBIT | AVAX-USDT | $0.9996 0.0002935 Eth | $110,133,657.00 2,565,195.020 AVAX | 0.0000% |
99 | CoinEx | BTC-USDT | $1.001 0.0002940 Eth | $90,209,599.00 973.635 BTC | 0.0000% |
100 | BingX | BTC-USDT | $0.9997 0.0002933 Eth | $66,193,110.00 714.369 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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