Overview
Max Total Supply
62,939,188,189.669465 USDT
Holders
6,344,555 ( 0.079%)
Market
Price
$1.00 @ 0.000321 ETH (+0.16%)
Onchain Market Cap
$63,128,005,754.24
Circulating Supply Market Cap
$126,787,450,176.00
Other Info
Token Contract (WITH 6 Decimals)
Balance
0.000179 USDTValue
$0.00 ( ~0 Eth) [0.0000%]Loading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | BTC-USDT | $1.00 0.0003195 Eth | $6,019,616,148.00 66,794.927 BTC | 0.0000% |
2 | Binance | PEPE-USDT | $1.001 0.0003178 Eth | $4,318,917,098.00 199,706,190,038,517.000 PEPE | 62.5978% |
3 | Pionex | BTC-USDT | $1.00 0.0003183 Eth | $4,095,524,549.00 45,394.678 BTC | 0.0000% |
4 | Ourbit | BTC-USDT | $1.001 0.0003196 Eth | $3,671,999,479.00 40,704.206 BTC | 0.0000% |
5 | CoinW | BTC-USDT | $1.00 0.0003195 Eth | $3,306,089,322.00 37,099.742 BTC | 0.0000% |
6 | WEEX | BTC-USDT | $1.001 0.0003195 Eth | $3,214,013,925.00 36,244.734 BTC | 0.0000% |
7 | OrangeX | BTC-USDT | $1.001 0.0003184 Eth | $3,166,752,127.00 35,136.814 BTC | 0.0000% |
8 | Binance | DOGE-USDT | $1.00 0.0003195 Eth | $3,066,285,545.00 7,782,731,082.000 DOGE | 0.0024% |
9 | Bybit | BTC-USDT | $1.00 0.0003194 Eth | $2,984,693,676.00 33,143.633 BTC | 0.0000% |
10 | Toobit | BTC-USDT | $0.9999 0.0003193 Eth | $2,928,941,816.00 32,505.738 BTC | 0.0000% |
11 | BitMart | BTC-USDT | $1.00 0.0003195 Eth | $2,872,067,742.00 32,186.389 BTC | 0.0000% |
12 | WhiteBIT | BTC-USDT | $1.00 0.0003195 Eth | $2,473,088,404.00 27,703.498 BTC | 0.0000% |
13 | Binance | ETH-USDT | $1.00 0.0003195 Eth | $2,206,850,854.00 695,587.166 ETH | 0.0000% |
14 | DigiFinex | BTC-USDT | $1.00 0.0003195 Eth | $2,097,447,412.00 23,493.541 BTC | 0.0000% |
15 | Hotcoin | BTC-USDT | $1.001 0.0003183 Eth | $1,954,599,443.00 21,915.396 BTC | 0.0000% |
16 | Bitunix | BTC-USDT | $1.001 0.0003184 Eth | $1,888,145,124.00 21,105.696 BTC | 0.0000% |
17 | Binance | FDUSD-USDT | $1.00 0.0003177 Eth | $1,809,111,854.00 1,808,695,303.000 FDUSD | 0.0006% |
18 | OKX | BTC-USDT | $1.00 0.0003195 Eth | $1,722,823,274.00 19,125.190 BTC | 0.0000% |
19 | BitMart | ETH-USDT | $1.00 0.0003195 Eth | $1,528,251,168.00 487,881.295 ETH | 0.0000% |
20 | Deepcoin | BTC-USDT | $1.001 0.0003178 Eth | $1,506,165,896.00 17,183.358 BTC | 0.0000% |
21 | Tapbit | ETH-USDT | $1.00 0.0003194 Eth | $1,481,414,859.00 466,736.390 ETH | 0.0000% |
22 | Toobit | ETH-USDT | $0.9999 0.0003193 Eth | $1,437,869,921.00 453,313.951 ETH | 0.0000% |
23 | P2B | BTC-USDT | $1.001 0.0003185 Eth | $1,394,421,081.00 15,597.664 BTC | 0.0000% |
24 | Pionex | ETH-USDT | $1.001 0.0003184 Eth | $1,362,388,433.00 428,290.413 ETH | 0.0000% |
25 | Gate.io | BTC-USDT | $0.9999 0.0003193 Eth | $1,320,851,316.00 14,682.080 BTC | 0.0000% |
26 | OKX | DOGE-USDT | $1.00 0.0003195 Eth | $1,281,009,210.00 3,254,949,062.355 DOGE | 0.0010% |
27 | XT.COM | BTC-USDT | $1.001 0.0003189 Eth | $1,177,119,721.00 13,053.819 BTC | 0.0000% |
28 | Coinbase Exchange | USDT-USD | $1.00 0.0003195 Eth | $1,155,495,415.00 1,155,044,947.630 USDT | 0.0004% |
29 | Hotcoin | DOGE-USDT | $0.9994 0.0003183 Eth | $1,031,210,978.00 2,608,981,484.281 DOGE | 0.0008% |
30 | LATOKEN | BTC-USDT | $1.001 0.0003184 Eth | $980,936,399.00 10,971.086 BTC | 0.0000% |
31 | MEXC | BTC-USDT | $1.001 0.0003184 Eth | $979,894,959.00 10,967.756 BTC | 0.0000% |
32 | Hotcoin | ETH-USDT | $0.9994 0.0003183 Eth | $964,223,410.00 307,793.027 ETH | 0.0000% |
33 | Gate.io | ETH-USDT | $0.9999 0.0003193 Eth | $938,295,451.00 296,313.234 ETH | 0.0000% |
34 | Bybit | ETH-USDT | $1.00 0.0003194 Eth | $932,768,850.00 293,721.563 ETH | 0.0000% |
35 | Binance | WIF-USDT | $1.001 0.0003186 Eth | $930,672,722.00 226,143,203.730 WIF | 0.0001% |
36 | AscendEX (BitMax) | BTC-USDT | $1.00 0.0003195 Eth | $929,352,231.00 10,430.878 BTC | 0.0000% |
37 | OKX | PEPE-USDT | $1.00 0.0003195 Eth | $896,730,436.00 41,255,350,574,183.000 PEPE | 12.9315% |
38 | CoinW | ETH-USDT | $1.00 0.0003195 Eth | $808,417,621.00 258,548.577 ETH | 0.0000% |
39 | DigiFinex | ETH-USDT | $1.00 0.0003195 Eth | $756,524,633.00 241,682.958 ETH | 0.0000% |
40 | MEXC | ETH-USDT | $1.001 0.0003184 Eth | $748,037,981.00 238,617.764 ETH | 0.0000% |
41 | OKX | ETH-USDT | $1.00 0.0003195 Eth | $716,262,406.00 225,857.892 ETH | 0.0000% |
42 | WhiteBIT | ETH-USDT | $1.001 0.0003194 Eth | $715,660,739.00 228,691.490 ETH | 0.0000% |
43 | BigONE | BTC-USDT | $1.001 0.0003196 Eth | $713,278,157.00 8,034.498 BTC | 0.0000% |
44 | Binance | XRP-USDT | $1.001 0.0003185 Eth | $709,557,329.00 997,790,692.000 XRP | 0.0003% |
45 | Binance | BNB-USDT | $1.00 0.0003195 Eth | $707,715,324.00 1,119,093.616 BNB | 0.0000% |
46 | Bybit | PEPE-USDT | $1.00 0.0003194 Eth | $692,024,185.00 31,937,338,776,267.000 PEPE | 10.0107% |
47 | Tapbit | BTC-USDT | $1.00 0.0003194 Eth | $661,694,009.00 7,341.593 BTC | 0.0000% |
48 | Bitunix | ETH-USDT | $1.001 0.0003184 Eth | $641,778,509.00 204,523.626 ETH | 0.0000% |
49 | HTX | BTC-USDT | $1.00 0.0003194 Eth | $631,019,090.00 6,989.511 BTC | 0.0000% |
50 | Ourbit | ETH-USDT | $1.001 0.0003186 Eth | $617,873,403.00 194,339.252 ETH | 0.0000% |
51 | XT.COM | ETH-USDT | $1.001 0.0003184 Eth | $616,728,541.00 194,220.429 ETH | 0.0000% |
52 | Binance | SHIB-USDT | $1.001 0.0003181 Eth | $571,291,835.00 22,319,804,572,051.000 SHIB | 6.9961% |
53 | OrangeX | ETH-USDT | $1.00 0.0003194 Eth | $568,672,262.00 178,875.313 ETH | 0.0000% |
54 | BTSE | BTC-USDT | $0.9992 0.0003185 Eth | $567,491,207.00 6,370.521 BTC | 0.0000% |
55 | Binance | NEIRO-USDT | $1.00 0.0003182 Eth | $542,155,056.00 218,848,207,228.000 NEIRO | 0.0686% |
56 | Bitget | DOGE-USDT | $1.00 0.0003194 Eth | $516,147,885.00 1,312,448,547.187 DOGE | 0.0004% |
57 | AscendEX (BitMax) | ETH-USDT | $1.00 0.0003195 Eth | $504,550,383.00 161,397.017 ETH | 0.0000% |
58 | Bitget | PEPE-USDT | $1.00 0.0003194 Eth | $474,485,673.00 22,134,872,192,354.000 PEPE | 6.9382% |
59 | FameEX | SOL-USDT | $1.001 0.0003196 Eth | $473,537,183.00 2,197,519.448 SOL | 0.0000% |
60 | Bitunix | DOGE-USDT | $0.9992 0.0003185 Eth | $471,510,741.00 1,198,111,243.000 DOGE | 0.0004% |
61 | Gate.io | DOGE-USDT | $0.9999 0.0003193 Eth | $460,640,639.00 1,171,496,494.679 DOGE | 0.0004% |
62 | Biconomy.com | BTC-USDT | $1.00 0.0003187 Eth | $458,219,948.00 5,081.221 BTC | 0.0000% |
63 | Bitget | BTC-USDT | $1.00 0.0003194 Eth | $439,514,178.00 4,881.003 BTC | 0.0000% |
64 | LATOKEN | ETH-USDT | $1.001 0.0003184 Eth | $428,456,163.00 136,590.941 ETH | 0.0000% |
65 | Binance | BOME-USDT | $1.001 0.0003186 Eth | $408,959,327.00 36,433,245,812.000 BOME | 0.0114% |
66 | DigiFinex | DOGE-USDT | $1.00 0.0003195 Eth | $408,168,626.00 1,034,495,799.760 DOGE | 0.0003% |
67 | Bybit | SOL-USDT | $1.00 0.0003194 Eth | $403,402,099.00 1,874,981.022 SOL | 0.0000% |
68 | Azbit | BTC-USDT | $1.00 0.0003195 Eth | $402,943,714.00 4,467.470 BTC | 0.0000% |
69 | Bybit | USDC-USDT | $1.00 0.0003194 Eth | $362,400,002.00 362,677,126.480 USDC | 0.0001% |
70 | Deepcoin | SOL-USDT | $1.00 0.0003195 Eth | $358,102,687.00 1,732,293.332 SOL | 0.0000% |
71 | OrangeX | DOGE-USDT | $0.9994 0.0003183 Eth | $350,319,588.00 891,432,170.000 DOGE | 0.0003% |
72 | WhiteBIT | WIF-USDT | $1.001 0.0003179 Eth | $327,646,883.00 81,020,309.560 WIF | 0.0000% |
73 | Binance | FLOKI-USDT | $1.00 0.0003187 Eth | $322,406,603.00 1,394,330,415,921.000 FLOKI | 0.4371% |
74 | OKX | SOL-USDT | $1.00 0.0003195 Eth | $320,831,662.00 1,489,367.781 SOL | 0.0000% |
75 | WhiteBIT | DOGE-USDT | $1.001 0.0003188 Eth | $303,692,552.00 767,190,157.000 DOGE | 0.0002% |
76 | Coinstore | BTC-USDT | $0.9992 0.0003185 Eth | $271,957,204.00 3,012.801 BTC | 0.0000% |
77 | KuCoin | ETH-USDT | $1.00 0.0003194 Eth | $255,482,840.00 81,754.111 ETH | 0.0000% |
78 | Bybit | XRP-USDT | $1.00 0.0003194 Eth | $238,409,701.00 334,755,730.900 XRP | 0.0001% |
79 | Coinstore | ETH-USDT | $1.001 0.0003194 Eth | $232,316,679.00 72,952.758 ETH | 0.0000% |
80 | Gate.io | SOL-USDT | $0.9999 0.0003193 Eth | $231,933,994.00 1,078,649.478 SOL | 0.0000% |
81 | WEEX | DOGE-USDT | $1.001 0.0003186 Eth | $230,499,955.00 582,959,676.316 DOGE | 0.0002% |
82 | BTSE | ETH-USDT | $1.001 0.0003184 Eth | $228,739,194.00 72,913.747 ETH | 0.0000% |
83 | Bitget | ETH-USDT | $1.00 0.0003194 Eth | $218,503,492.00 68,841.905 ETH | 0.0000% |
84 | Deepcoin | DOGE-USDT | $1.00 0.0003187 Eth | $213,202,146.00 560,583,076.382 DOGE | 0.0002% |
85 | Binance | ADA-USDT | $1.001 0.0003186 Eth | $201,521,396.00 353,727,489.500 ADA | 0.0001% |
86 | Binance | LTC-USDT | $1.001 0.0003183 Eth | $185,295,652.00 2,319,244.046 LTC | 0.0000% |
87 | Dex-Trade | BTC-USDT | $1.001 0.0003168 Eth | $183,495,981.00 2,059.816 BTC | 0.0000% |
88 | HTX | ETH-USDT | $1.00 0.0003195 Eth | $168,820,702.00 53,111.595 ETH | 0.0000% |
89 | CoinEx | DOGE-USDT | $1.001 0.0003188 Eth | $157,472,209.00 399,375,269.835 DOGE | 0.0001% |
90 | Bitget | SOL-USDT | $1.00 0.0003194 Eth | $147,969,441.00 688,219.197 SOL | 0.0000% |
91 | Gate.io | XRP-USDT | $0.9999 0.0003193 Eth | $146,333,340.00 206,903,788.827 XRP | 0.0001% |
92 | DigiFinex | SOL-USDT | $1.00 0.0003195 Eth | $142,571,341.00 663,277.850 SOL | 0.0000% |
93 | Fastex | BTC-USDT | $1.001 0.0003184 Eth | $142,398,045.00 1,598.581 BTC | 0.0000% |
94 | WhiteBIT | AVAX-USDT | $1.00 0.0003197 Eth | $135,191,584.00 4,179,230.813 AVAX | 0.0000% |
95 | LBank | SOL-USDT | $1.00 0.0003195 Eth | $133,408,778.00 621,481.541 SOL | 0.0000% |
96 | CoinEx | BTC-USDT | $1.001 0.0003192 Eth | $129,861,628.00 1,438.725 BTC | 0.0000% |
97 | BYDFi | BTC-USDT | $1.00 0.0003183 Eth | $128,501,799.00 1,438.558 BTC | 0.0000% |
98 | Slex | BTC-USDT | $1.00 0.0003194 Eth | $123,433,460.00 1,369.138 BTC | 0.0000% |
99 | BTSE | DOGE-USDT | $1.001 0.0003184 Eth | $122,134,240.00 308,573,712.148 DOGE | 0.0001% |
100 | WhiteBIT | LINK-USDT | $1.001 0.0003188 Eth | $106,659,541.00 8,017,704.780 LINK | 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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