Overview
Max Total Supply
54,940,840,345.993792 USDT
Holders
6,282,537 ( 0.062%)
Market
Price
$1.00 @ 0.000399 ETH (+0.48%)
Onchain Market Cap
$54,995,781,186.34
Circulating Supply Market Cap
$120,278,603,957.00
Other Info
Token Contract (WITH 6 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | BTC-USDT | $0.9993 0.0003975 Eth | $2,861,332,331.00 40,921.640 BTC | 0.0000% |
2 | BVOX | BTC-USDT | $0.9997 0.0003991 Eth | $1,606,335,397.00 22,978.085 BTC | 0.0000% |
3 | Ourbit | BTC-USDT | $0.9993 0.0003982 Eth | $1,592,602,862.00 22,778.674 BTC | 0.0000% |
4 | Bybit | BTC-USDT | $0.9994 0.0003976 Eth | $1,428,047,691.00 20,438.075 BTC | 0.0000% |
5 | OrangeX | BTC-USDT | $0.9993 0.0003975 Eth | $1,334,820,691.00 19,085.807 BTC | 0.0000% |
6 | Binance | USDC-USDT | $0.9993 0.0003975 Eth | $1,172,556,439.00 1,172,465,879.000 USDC | 0.0093% |
7 | Binance | ETH-USDT | $0.9993 0.0003975 Eth | $1,143,360,477.00 453,889.402 ETH | 0.0000% |
8 | DigiFinex | BTC-USDT | $0.9993 0.0003975 Eth | $1,027,241,842.00 14,839.245 BTC | 0.0000% |
9 | WhiteBIT | BTC-USDT | $0.9993 0.0003979 Eth | $942,196,136.00 13,610.179 BTC | 0.0000% |
10 | OKX | BTC-USDT | $0.9993 0.0003975 Eth | $892,361,628.00 12,757.882 BTC | 0.0000% |
11 | MEXC | BTC-USDT | $0.9993 0.0003988 Eth | $823,877,172.00 11,925.121 BTC | 0.0000% |
12 | WEEX | ETH-USDT | $0.9993 0.0003984 Eth | $811,444,097.00 322,171.713 ETH | 0.0000% |
13 | Bitunix | BTC-USDT | $0.9995 0.0003992 Eth | $600,777,454.00 8,702.507 BTC | 0.0000% |
14 | BVOX | ETH-USDT | $0.9991 0.0003978 Eth | $466,043,297.00 185,211.798 ETH | 0.0000% |
15 | Bybit | ETH-USDT | $0.9994 0.0003976 Eth | $438,994,900.00 174,312.629 ETH | 0.0000% |
16 | Binance | DOGE-USDT | $0.9994 0.0003981 Eth | $402,049,314.00 2,497,155,379.000 DOGE | 0.0198% |
17 | DigiFinex | ETH-USDT | $0.9993 0.0003975 Eth | $391,633,828.00 155,876.581 ETH | 0.0000% |
18 | P2B | ETH-USDT | $0.9994 0.0003976 Eth | $389,865,507.00 155,209.441 ETH | 0.0000% |
19 | OKX | ETH-USDT | $0.9993 0.0003975 Eth | $351,256,180.00 139,347.398 ETH | 0.0000% |
20 | Coinbase Exchange | USDT-USD | $0.9992 0.0003975 Eth | $349,900,158.00 350,176,797.370 USDT | 0.0028% |
21 | CoinW | ETH-USDT | $0.9993 0.0003982 Eth | $338,132,126.00 134,747.896 ETH | 0.0000% |
22 | MEXC | ETH-USDT | $0.9993 0.0003982 Eth | $337,172,770.00 134,245.838 ETH | 0.0000% |
23 | Tapbit | BTC-USDT | $0.9991 0.0003984 Eth | $334,875,680.00 4,790.788 BTC | 0.0000% |
24 | LATOKEN | BTC-USDT | $0.9989 0.0003977 Eth | $306,551,060.00 4,430.563 BTC | 0.0000% |
25 | Biconomy.com | BTC-USDT | $0.9994 0.0003982 Eth | $263,206,310.00 3,764.232 BTC | 0.0000% |
26 | Bitunix | ETH-USDT | $0.9995 0.0003992 Eth | $217,714,176.00 86,797.650 ETH | 0.0000% |
27 | KuCoin | BTC-USDT | $0.9994 0.0003976 Eth | $208,568,198.00 3,012.087 BTC | 0.0000% |
28 | Fastex | BTC-USDT | $0.9993 0.0003988 Eth | $206,632,843.00 2,991.236 BTC | 0.0000% |
29 | Ourbit | ETH-USDT | $0.9993 0.0003982 Eth | $201,802,456.00 80,125.828 ETH | 0.0000% |
30 | Bybit | USDC-USDT | $0.9994 0.0003976 Eth | $199,554,436.00 199,512,268.560 USDC | 0.0016% |
31 | Binance | SUI-USDT | $0.9993 0.0003975 Eth | $185,105,210.00 93,029,330.900 SUI | 0.0007% |
32 | LBank | ETH-USDT | $0.9994 0.0003978 Eth | $181,772,179.00 72,397.038 ETH | 0.0000% |
33 | WhiteBIT | SOL-USDT | $0.9993 0.0003979 Eth | $175,975,968.00 1,056,211.292 SOL | 0.0000% |
34 | Coinstore | BTC-USDT | $0.9994 0.0003984 Eth | $169,505,159.00 2,422.924 BTC | 0.0000% |
35 | OKX | DOGE-USDT | $0.9993 0.0003975 Eth | $162,429,606.00 1,009,763,530.816 DOGE | 0.0080% |
36 | LATOKEN | ETH-USDT | $0.9989 0.0003977 Eth | $156,365,945.00 62,270.697 ETH | 0.0000% |
37 | Bitget | ETH-USDT | $0.9993 0.0003975 Eth | $153,980,643.00 61,179.475 ETH | 0.0000% |
38 | KuCoin | ETH-USDT | $0.9994 0.0003976 Eth | $150,054,421.00 59,723.466 ETH | 0.0000% |
39 | Binance | BNB-USDT | $0.9993 0.0003983 Eth | $147,145,122.00 255,379.850 BNB | 0.0000% |
40 | Biconomy.com | ETH-USDT | $0.9993 0.0003983 Eth | $146,595,801.00 58,209.655 ETH | 0.0000% |
41 | Coinstore | ETH-USDT | $0.9992 0.0003981 Eth | $144,409,848.00 57,348.555 ETH | 0.0000% |
42 | Binance | XRP-USDT | $0.9993 0.0003979 Eth | $141,292,672.00 274,042,266.000 XRP | 0.0022% |
43 | Bybit | SOL-USDT | $0.9994 0.0003976 Eth | $139,444,641.00 831,000.140 SOL | 0.0000% |
44 | Kraken | USDT-USD | $0.9993 0.0003975 Eth | $136,468,133.00 136,566,460.694 USDT | 0.0011% |
45 | OKX | SOL-USDT | $0.9993 0.0003975 Eth | $133,427,828.00 795,529.363 SOL | 0.0000% |
46 | Binance | WIF-USDT | $0.9993 0.0003975 Eth | $129,302,571.00 55,547,731.660 WIF | 0.0004% |
47 | BigONE | ETH-USDT | $0.9994 0.0003984 Eth | $112,070,086.00 44,678.651 ETH | 0.0000% |
48 | LBank | SOL-USDT | $0.9994 0.0003978 Eth | $94,588,717.00 568,174.006 SOL | 0.0000% |
49 | Coinbase Exchange | BTC-USDT | $0.9993 0.0003975 Eth | $82,697,996.00 1,194.547 BTC | 0.0000% |
50 | Deepcoin | UXLINK-USDT | $0.9994 0.0003982 Eth | $77,968,801.00 149,760,022.610 UXLINK | 0.0012% |
51 | Bitget | SOL-USDT | $0.9993 0.0003975 Eth | $77,169,837.00 460,679.906 SOL | 0.0000% |
52 | Bybit | MNT-USDT | $0.9994 0.0003976 Eth | $74,349,066.00 127,089,787.910 MNT | 0.0010% |
53 | LBank | USDC-USDT | $0.9996 0.0003979 Eth | $72,735,212.00 72,716,507.960 USDC | 0.0006% |
54 | Bybit | DOGE-USDT | $0.9994 0.0003976 Eth | $72,231,673.00 448,731,645.000 DOGE | 0.0036% |
55 | Bitget | BGB-USDT | $0.9993 0.0003975 Eth | $70,720,360.00 62,581,115.881 BGB | 0.0005% |
56 | Bybit | XRP-USDT | $0.9994 0.0003976 Eth | $69,854,151.00 135,627,881.490 XRP | 0.0011% |
57 | CoinEx | BTC-USDT | $0.9997 0.0003991 Eth | $64,521,175.00 921.917 BTC | 0.0000% |
58 | Gate.io | SUI-USDT | $0.9993 0.0003979 Eth | $63,595,849.00 31,935,471.800 SUI | 0.0003% |
59 | Binance | TIA-USDT | $0.9995 0.0003983 Eth | $62,558,650.00 13,153,071.830 TIA | 0.0001% |
60 | Binance | ENA-USDT | $0.9993 0.0003975 Eth | $62,239,228.00 167,694,555.850 ENA | 0.0013% |
61 | MEXC | MX-USDT | $0.9993 0.0003975 Eth | $60,898,554.00 22,221,565.820 MX | 0.0002% |
62 | C-Patex | BTC-USDT | $0.9993 0.0003979 Eth | $57,452,918.00 830.815 BTC | 0.0000% |
63 | OKX | SUI-USDT | $0.9994 0.0003976 Eth | $56,288,366.00 28,284,454.080 SUI | 0.0002% |
64 | WhiteBIT | USDC-USDT | $0.9993 0.0003988 Eth | $56,120,507.00 56,127,917.393 USDC | 0.0004% |
65 | Gate.io | KAS-USDT | $0.9994 0.0003978 Eth | $55,732,443.00 477,680,414.550 KAS | 0.0038% |
66 | Bitunix | SOL-USDT | $0.9995 0.0003992 Eth | $53,138,974.00 319,493.020 SOL | 0.0000% |
67 | DigiFinex | DOGE-USDT | $0.9993 0.0003975 Eth | $51,953,447.00 324,720,888.190 DOGE | 0.0026% |
68 | CoinW | SOL-USDT | $0.9991 0.0003984 Eth | $51,569,268.00 310,576.893 SOL | 0.0000% |
69 | PointPay | BTC-USDT | $0.9993 0.0003979 Eth | $50,950,852.00 728.645 BTC | 0.0000% |
70 | Binance | RUNE-USDT | $0.9993 0.0003975 Eth | $50,073,689.00 8,869,428.500 RUNE | 0.0001% |
71 | BVOX | SOL-USDT | $0.9997 0.0003991 Eth | $49,541,980.00 294,567.090 SOL | 0.0000% |
72 | Binance | TAO-USDT | $0.9993 0.0003982 Eth | $47,561,281.00 101,526.547 TAO | 0.0000% |
73 | DigiFinex | SOL-USDT | $0.9994 0.0003976 Eth | $46,950,174.00 282,011.810 SOL | 0.0000% |
74 | Deepcoin | USDC-USDT | $0.9993 0.0003979 Eth | $46,268,003.00 46,429,625.218 USDC | 0.0004% |
75 | Bitunix | DOGE-USDT | $0.9995 0.0003992 Eth | $46,180,405.00 289,122,905.000 DOGE | 0.0023% |
76 | Bitget | PEPE-USDT | $0.9995 0.0003978 Eth | $41,257,349.00 4,557,670,199,866.000 PEPE | 36.0677% |
77 | WhiteBIT | LINK-USDT | $0.9993 0.0003979 Eth | $39,742,788.00 3,502,369.620 LINK | 0.0000% |
78 | BTSE | DOGE-USDT | $0.9992 0.0003984 Eth | $38,930,562.00 242,893,545.924 DOGE | 0.0019% |
79 | Binance | UNI-USDT | $0.9993 0.0003975 Eth | $35,103,520.00 4,506,313.990 UNI | 0.0000% |
80 | Uniswap V3 (Ethereum) | 0X4C9EDD5852CD905F086C759E8383E09BFF1E68B3-0XDAC17F958D2EE523A2206206994597C13D831EC7 | $0.9995 0.0003978 Eth | $34,388,480.00 34,351,502.889 0X4C9EDD5852CD905F086C759E8383E09BFF1E68B3 | 0.0003% |
81 | WhiteBIT | TRX-USDT | $0.9993 0.0003979 Eth | $33,760,460.00 202,117,077.300 TRX | 0.0016% |
82 | WhiteBIT | UNI-USDT | $0.9993 0.0003979 Eth | $33,751,116.00 4,441,184.050 UNI | 0.0000% |
83 | KuCoin | SOL-USDT | $0.9994 0.0003976 Eth | $32,775,970.00 196,841.926 SOL | 0.0000% |
84 | DigiFinex | SUI-USDT | $0.9994 0.0003976 Eth | $32,375,584.00 16,377,519.700 SUI | 0.0001% |
85 | WhiteBIT | PEPE-USDT | $0.9993 0.0003979 Eth | $31,127,372.00 3,493,541,937,805.000 PEPE | 27.6466% |
86 | Gate.io | PEOPLE-USDT | $0.9993 0.0003979 Eth | $30,597,490.00 436,421,275.400 PEOPLE | 0.0035% |
87 | OKX | PEPE-USDT | $0.9994 0.0003976 Eth | $30,514,543.00 3,367,673,208,960.000 PEPE | 26.6505% |
88 | Azbit | TRX-USDT | $0.9994 0.0003982 Eth | $30,377,738.00 181,273,424.150 TRX | 0.0014% |
89 | WhiteBIT | NEAR-USDT | $0.9993 0.0003979 Eth | $29,586,060.00 7,443,281.680 NEAR | 0.0001% |
90 | LBank | DOGE-USDT | $0.9996 0.0003979 Eth | $28,608,335.00 177,814,359.000 DOGE | 0.0014% |
91 | Binance | LTC-USDT | $0.9993 0.0003975 Eth | $28,387,623.00 408,737.136 LTC | 0.0000% |
92 | Gate.io | ETHFI-USDT | $0.9993 0.0003979 Eth | $27,774,779.00 19,551,413.740 ETHFI | 0.0002% |
93 | WhiteBIT | XRP-USDT | $1.00 0.0003978 Eth | $26,906,119.00 52,126,567.100 XRP | 0.0004% |
94 | Trubit | BTC-USDT | $0.9997 0.0003991 Eth | $25,685,075.00 367.332 BTC | 0.0000% |
95 | Gate.io | BOME-USDT | $0.9993 0.0003979 Eth | $24,635,709.00 3,064,136,246.300 BOME | 0.0242% |
96 | XT.COM | DOGE-USDT | $0.9993 0.0003982 Eth | $24,408,130.00 151,611,854.000 DOGE | 0.0012% |
97 | DigiFinex | TRX-USDT | $0.9993 0.0003975 Eth | $23,263,921.00 139,273,174.300 TRX | 0.0011% |
98 | Binance | JUP-USDT | $0.9993 0.0003975 Eth | $22,590,208.00 23,278,272.400 JUP | 0.0002% |
99 | OKX | SHIB-USDT | $0.9993 0.0003975 Eth | $21,237,707.00 1,204,512,137,637.000 SHIB | 9.5321% |
100 | Kraken | BTC-USDT | $0.999 0.0003974 Eth | $20,334,016.00 293.980 BTC | 0.0000% |
Contract Name:
TetherToken
Compiler Version
v0.4.18+commit.9cf6e910
Optimization Enabled:
No with 0 runs
Other Settings:
default evmVersion, Audited
Contract Source Code (Solidity)Audit Report
/** *Submitted for verification at Etherscan.io on 2017-11-28 */ pragma solidity ^0.4.17; /** * @title SafeMath * @dev Math operations with safety checks that throw on error */ library SafeMath { function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a * b; assert(c / a == b); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { // assert(b > 0); // Solidity automatically throws when dividing by 0 uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { assert(b <= a); return a - b; } function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; assert(c >= a); return c; } } /** * @title Ownable * @dev The Ownable contract has an owner address, and provides basic authorization control * functions, this simplifies the implementation of "user permissions". */ contract Ownable { address public owner; /** * @dev The Ownable constructor sets the original `owner` of the contract to the sender * account. */ function Ownable() public { owner = msg.sender; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(msg.sender == owner); _; } /** * @dev Allows the current owner to transfer control of the contract to a newOwner. * @param newOwner The address to transfer ownership to. */ function transferOwnership(address newOwner) public onlyOwner { if (newOwner != address(0)) { owner = newOwner; } } } /** * @title ERC20Basic * @dev Simpler version of ERC20 interface * @dev see https://github.com/ethereum/EIPs/issues/20 */ contract ERC20Basic { uint public _totalSupply; function totalSupply() public constant returns (uint); function balanceOf(address who) public constant returns (uint); function transfer(address to, uint value) public; event Transfer(address indexed from, address indexed to, uint value); } /** * @title ERC20 interface * @dev see https://github.com/ethereum/EIPs/issues/20 */ contract ERC20 is ERC20Basic { function allowance(address owner, address spender) public constant returns (uint); function transferFrom(address from, address to, uint value) public; function approve(address spender, uint value) public; event Approval(address indexed owner, address indexed spender, uint value); } /** * @title Basic token * @dev Basic version of StandardToken, with no allowances. */ contract BasicToken is Ownable, ERC20Basic { using SafeMath for uint; mapping(address => uint) public balances; // additional variables for use if transaction fees ever became necessary uint public basisPointsRate = 0; uint public maximumFee = 0; /** * @dev Fix for the ERC20 short address attack. */ modifier onlyPayloadSize(uint size) { require(!(msg.data.length < size + 4)); _; } /** * @dev transfer token for a specified address * @param _to The address to transfer to. * @param _value The amount to be transferred. */ function transfer(address _to, uint _value) public onlyPayloadSize(2 * 32) { uint fee = (_value.mul(basisPointsRate)).div(10000); if (fee > maximumFee) { fee = maximumFee; } uint sendAmount = _value.sub(fee); balances[msg.sender] = balances[msg.sender].sub(_value); balances[_to] = balances[_to].add(sendAmount); if (fee > 0) { balances[owner] = balances[owner].add(fee); Transfer(msg.sender, owner, fee); } Transfer(msg.sender, _to, sendAmount); } /** * @dev Gets the balance of the specified address. * @param _owner The address to query the the balance of. * @return An uint representing the amount owned by the passed address. */ function balanceOf(address _owner) public constant returns (uint balance) { return balances[_owner]; } } /** * @title Standard ERC20 token * * @dev Implementation of the basic standard token. * @dev https://github.com/ethereum/EIPs/issues/20 * @dev Based oncode by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol */ contract StandardToken is BasicToken, ERC20 { mapping (address => mapping (address => uint)) public allowed; uint public constant MAX_UINT = 2**256 - 1; /** * @dev Transfer tokens from one address to another * @param _from address The address which you want to send tokens from * @param _to address The address which you want to transfer to * @param _value uint the amount of tokens to be transferred */ function transferFrom(address _from, address _to, uint _value) public onlyPayloadSize(3 * 32) { var _allowance = allowed[_from][msg.sender]; // Check is not needed because sub(_allowance, _value) will already throw if this condition is not met // if (_value > _allowance) throw; uint fee = (_value.mul(basisPointsRate)).div(10000); if (fee > maximumFee) { fee = maximumFee; } if (_allowance < MAX_UINT) { allowed[_from][msg.sender] = _allowance.sub(_value); } uint sendAmount = _value.sub(fee); balances[_from] = balances[_from].sub(_value); balances[_to] = balances[_to].add(sendAmount); if (fee > 0) { balances[owner] = balances[owner].add(fee); Transfer(_from, owner, fee); } Transfer(_from, _to, sendAmount); } /** * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender. * @param _spender The address which will spend the funds. * @param _value The amount of tokens to be spent. */ function approve(address _spender, uint _value) public onlyPayloadSize(2 * 32) { // To change the approve amount you first have to reduce the addresses` // allowance to zero by calling `approve(_spender, 0)` if it is not // already 0 to mitigate the race condition described here: // https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 require(!((_value != 0) && (allowed[msg.sender][_spender] != 0))); allowed[msg.sender][_spender] = _value; Approval(msg.sender, _spender, _value); } /** * @dev Function to check the amount of tokens than an owner allowed to a spender. * @param _owner address The address which owns the funds. * @param _spender address The address which will spend the funds. * @return A uint specifying the amount of tokens still available for the spender. */ function allowance(address _owner, address _spender) public constant returns (uint remaining) { return allowed[_owner][_spender]; } } /** * @title Pausable * @dev Base contract which allows children to implement an emergency stop mechanism. */ contract Pausable is Ownable { event Pause(); event Unpause(); bool public paused = false; /** * @dev Modifier to make a function callable only when the contract is not paused. */ modifier whenNotPaused() { require(!paused); _; } /** * @dev Modifier to make a function callable only when the contract is paused. */ modifier whenPaused() { require(paused); _; } /** * @dev called by the owner to pause, triggers stopped state */ function pause() onlyOwner whenNotPaused public { paused = true; Pause(); } /** * @dev called by the owner to unpause, returns to normal state */ function unpause() onlyOwner whenPaused public { paused = false; Unpause(); } } contract BlackList is Ownable, BasicToken { /////// Getters to allow the same blacklist to be used also by other contracts (including upgraded Tether) /////// function getBlackListStatus(address _maker) external constant returns (bool) { return isBlackListed[_maker]; } function getOwner() external constant returns (address) { return owner; } mapping (address => bool) public isBlackListed; function addBlackList (address _evilUser) public onlyOwner { isBlackListed[_evilUser] = true; AddedBlackList(_evilUser); } function removeBlackList (address _clearedUser) public onlyOwner { isBlackListed[_clearedUser] = false; RemovedBlackList(_clearedUser); } function destroyBlackFunds (address _blackListedUser) public onlyOwner { require(isBlackListed[_blackListedUser]); uint dirtyFunds = balanceOf(_blackListedUser); balances[_blackListedUser] = 0; _totalSupply -= dirtyFunds; DestroyedBlackFunds(_blackListedUser, dirtyFunds); } event DestroyedBlackFunds(address _blackListedUser, uint _balance); event AddedBlackList(address _user); event RemovedBlackList(address _user); } contract UpgradedStandardToken is StandardToken{ // those methods are called by the legacy contract // and they must ensure msg.sender to be the contract address function transferByLegacy(address from, address to, uint value) public; function transferFromByLegacy(address sender, address from, address spender, uint value) public; function approveByLegacy(address from, address spender, uint value) public; } contract TetherToken is Pausable, StandardToken, BlackList { string public name; string public symbol; uint public decimals; address public upgradedAddress; bool public deprecated; // The contract can be initialized with a number of tokens // All the tokens are deposited to the owner address // // @param _balance Initial supply of the contract // @param _name Token Name // @param _symbol Token symbol // @param _decimals Token decimals function TetherToken(uint _initialSupply, string _name, string _symbol, uint _decimals) public { _totalSupply = _initialSupply; name = _name; symbol = _symbol; decimals = _decimals; balances[owner] = _initialSupply; deprecated = false; } // Forward ERC20 methods to upgraded contract if this one is deprecated function transfer(address _to, uint _value) public whenNotPaused { require(!isBlackListed[msg.sender]); if (deprecated) { return UpgradedStandardToken(upgradedAddress).transferByLegacy(msg.sender, _to, _value); } else { return super.transfer(_to, _value); } } // Forward ERC20 methods to upgraded contract if this one is deprecated function transferFrom(address _from, address _to, uint _value) public whenNotPaused { require(!isBlackListed[_from]); if (deprecated) { return UpgradedStandardToken(upgradedAddress).transferFromByLegacy(msg.sender, _from, _to, _value); } else { return super.transferFrom(_from, _to, _value); } } // Forward ERC20 methods to upgraded contract if this one is deprecated function balanceOf(address who) public constant returns (uint) { if (deprecated) { return UpgradedStandardToken(upgradedAddress).balanceOf(who); } else { return super.balanceOf(who); } } // Forward ERC20 methods to upgraded contract if this one is deprecated function approve(address _spender, uint _value) public onlyPayloadSize(2 * 32) { if (deprecated) { return UpgradedStandardToken(upgradedAddress).approveByLegacy(msg.sender, _spender, _value); } else { return super.approve(_spender, _value); } } // Forward ERC20 methods to upgraded contract if this one is deprecated function allowance(address _owner, address _spender) public constant returns (uint remaining) { if (deprecated) { return StandardToken(upgradedAddress).allowance(_owner, _spender); } else { return super.allowance(_owner, _spender); } } // deprecate current contract in favour of a new one function deprecate(address _upgradedAddress) public onlyOwner { deprecated = true; upgradedAddress = _upgradedAddress; Deprecate(_upgradedAddress); } // deprecate current contract if favour of a new one function totalSupply() public constant returns (uint) { if (deprecated) { return StandardToken(upgradedAddress).totalSupply(); } else { return _totalSupply; } } // Issue a new amount of tokens // these tokens are deposited into the owner address // // @param _amount Number of tokens to be issued function issue(uint amount) public onlyOwner { require(_totalSupply + amount > _totalSupply); require(balances[owner] + amount > balances[owner]); balances[owner] += amount; _totalSupply += amount; Issue(amount); } // Redeem tokens. // These tokens are withdrawn from the owner address // if the balance must be enough to cover the redeem // or the call will fail. // @param _amount Number of tokens to be issued function redeem(uint amount) public onlyOwner { require(_totalSupply >= amount); require(balances[owner] >= amount); _totalSupply -= amount; balances[owner] -= amount; Redeem(amount); } function setParams(uint newBasisPoints, uint newMaxFee) public onlyOwner { // Ensure transparency by hardcoding limit beyond which fees can never be added require(newBasisPoints < 20); require(newMaxFee < 50); basisPointsRate = newBasisPoints; maximumFee = newMaxFee.mul(10**decimals); Params(basisPointsRate, maximumFee); } // Called when new token are issued event Issue(uint amount); // Called when tokens are redeemed event Redeem(uint amount); // Called when contract is deprecated event Deprecate(address newAddress); // Called if contract ever adds fees event Params(uint feeBasisPoints, uint maxFee); }
Contract Security Audit
- Callisto Network - July 10th, 2019 - Security Audit Report
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onstant":false,"inputs":[{"name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_blackListedUser","type":"address"}],"name":"destroyBlackFunds","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"inputs":[{"name":"_initialSupply","type":"uint256"},{"name":"_name","type":"string"},{"name":"_symbol","type":"string"},{"name":"_decimals","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"name":"amount","type":"uint256"}],"name":"Issue","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"amount","type":"uint256"}],"name":"Redeem","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"newAddress","type":"address"}],"name":"Deprecate","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"feeBasisPoints","type":"uint256"},{"indexed":false,"name":"maxFee","type":"uint256"}],"name":"Params","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"_blackListedUser","type":"address"},{"indexed":false,"name":"_balance","type":"uint256"}],"name":"DestroyedBlackFunds","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"_user","type":"address"}],"name":"AddedBlackList","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"_user","type":"address"}],"name":"RemovedBlackList","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"owner","type":"address"},{"indexed":true,"name":"spender","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"from","type":"address"},{"indexed":true,"name":"to","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[],"name":"Pause","type":"event"},{"anonymous":false,"inputs":[],"name":"Unpause","type":"event"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000000000000000000000000000000000174876e800000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000c00000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000a546574686572205553440000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000045553445400000000000000000000000000000000000000000000000000000000
-----Decoded View---------------
Arg [0] : _initialSupply (uint256): 100000000000
Arg [1] : _name (string): Tether USD
Arg [2] : _symbol (string): USDT
Arg [3] : _decimals (uint256): 6
-----Encoded View---------------
8 Constructor Arguments found :
Arg [0] : 000000000000000000000000000000000000000000000000000000174876e800
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000080
Arg [2] : 00000000000000000000000000000000000000000000000000000000000000c0
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000006
Arg [4] : 000000000000000000000000000000000000000000000000000000000000000a
Arg [5] : 5465746865722055534400000000000000000000000000000000000000000000
Arg [6] : 0000000000000000000000000000000000000000000000000000000000000004
Arg [7] : 5553445400000000000000000000000000000000000000000000000000000000
Swarm Source
bzzr://645ee12d73db47fd78ba77fa1f824c3c8f9184061b3b10386beb4dc9236abb28
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