Overview
Max Total Supply
76,928,104,353.364467 USDT
Holders
6,550,646 ( -0.035%)
Market
Price
$1.00 @ 0.000257 ETH (+0.02%)
Onchain Market Cap
$77,005,032,457.72
Circulating Supply Market Cap
$140,193,869,031.00
Other Info
Token Contract (WITH 6 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Bybit | BTC-USDT | $0.9996 0.0002564 Eth | $1,909,427,429.00 18,757.536 BTC | 0.0000% |
2 | Binance | BTC-USDT | $0.9996 0.0002564 Eth | $1,623,741,850.00 15,915.394 BTC | 0.0000% |
3 | CoinW | BTC-USDT | $1.00 0.0002565 Eth | $1,328,400,743.00 12,905.868 BTC | 0.0000% |
4 | BVOX | BTC-USDT | $1.00 0.0002565 Eth | $1,259,249,585.00 12,340.141 BTC | 0.0000% |
5 | Binance | FDUSD-USDT | $0.9996 0.0002570 Eth | $1,076,495,645.00 1,076,076,187.000 FDUSD | 0.0085% |
6 | OrangeX | BTC-USDT | $0.9995 0.0002573 Eth | $1,051,089,819.00 10,282.631 BTC | 0.0000% |
7 | Toobit | BTC-USDT | $1.00 0.0002569 Eth | $920,284,836.00 9,005.051 BTC | 0.0000% |
8 | MEXC | BTC-USDT | $0.9996 0.0002564 Eth | $911,998,443.00 8,864.635 BTC | 0.0000% |
9 | Binance | ETH-USDT | $0.9996 0.0002567 Eth | $907,236,259.00 234,555.579 ETH | 0.0000% |
10 | Tapbit | ETH-USDT | $0.9996 0.0002564 Eth | $727,118,297.00 187,973.776 ETH | 0.0000% |
11 | DigiFinex | BTC-USDT | $1.00 0.0002565 Eth | $683,743,520.00 6,643.297 BTC | 0.0000% |
12 | Toobit | ETH-USDT | $0.9998 0.0002568 Eth | $616,661,352.00 159,371.464 ETH | 0.0000% |
13 | P2B | BTC-USDT | $0.9995 0.0002573 Eth | $606,455,693.00 5,903.424 BTC | 0.0000% |
14 | Binance | XRP-USDT | $0.9991 0.0002568 Eth | $601,998,815.00 250,410,244.000 XRP | 0.0020% |
15 | Bybit | ETH-USDT | $0.9996 0.0002564 Eth | $587,747,910.00 152,003.138 ETH | 0.0000% |
16 | WhiteBIT | BTC-USDT | $0.9995 0.0002567 Eth | $568,246,037.00 5,530.073 BTC | 0.0000% |
17 | WEEX | BTC-USDT | $0.9996 0.0002564 Eth | $562,915,322.00 5,523.714 BTC | 0.0000% |
18 | Binance | DOGE-USDT | $0.9998 0.0002566 Eth | $521,070,773.00 1,315,556,061.000 DOGE | 0.0104% |
19 | Bitget | ETH-USDT | $0.9996 0.0002564 Eth | $498,742,166.00 128,996.639 ETH | 0.0000% |
20 | Bitget | BTC-USDT | $0.9996 0.0002564 Eth | $493,182,624.00 4,833.081 BTC | 0.0000% |
21 | OKX | BTC-USDT | $0.9996 0.0002564 Eth | $456,370,602.00 4,469.285 BTC | 0.0000% |
22 | BVOX | ETH-USDT | $0.9998 0.0002568 Eth | $426,006,383.00 110,102.093 ETH | 0.0000% |
23 | BitMart | BTC-USDT | $1.00 0.0002567 Eth | $385,992,931.00 3,755.279 BTC | 0.0000% |
24 | Azbit | BTC-USDT | $0.9996 0.0002570 Eth | $376,767,386.00 3,701.456 BTC | 0.0000% |
25 | WEEX | ETH-USDT | $0.9995 0.0002572 Eth | $374,537,493.00 96,866.918 ETH | 0.0000% |
26 | DigiFinex | ETH-USDT | $1.00 0.0002565 Eth | $366,442,814.00 93,995.595 ETH | 0.0000% |
27 | Bitunix | BTC-USDT | $0.9996 0.0002570 Eth | $365,068,632.00 3,553.156 BTC | 0.0000% |
28 | P2B | ETH-USDT | $0.9997 0.0002566 Eth | $364,247,081.00 93,569.825 ETH | 0.0000% |
29 | XT.COM | BTC-USDT | $0.9995 0.0002572 Eth | $362,739,678.00 3,556.745 BTC | 0.0000% |
30 | OKX | ETH-USDT | $0.9996 0.0002564 Eth | $358,043,981.00 92,598.684 ETH | 0.0000% |
31 | WhiteBIT | ETH-USDT | $0.9995 0.0002565 Eth | $357,856,034.00 91,860.458 ETH | 0.0000% |
32 | Deepcoin | ETH-USDT | $0.9998 0.0002568 Eth | $351,630,899.00 88,872.810 ETH | 0.0000% |
33 | CoinW | ETH-USDT | $0.9992 0.0002572 Eth | $336,635,287.00 86,579.411 ETH | 0.0000% |
34 | LBank | BTC-USDT | $0.9996 0.0002564 Eth | $327,248,524.00 3,181.160 BTC | 0.0000% |
35 | Ourbit | ETH-USDT | $0.9996 0.0002564 Eth | $321,413,254.00 83,056.853 ETH | 0.0000% |
36 | Binance | ENA-USDT | $0.9996 0.0002564 Eth | $296,741,324.00 265,717,656.380 ENA | 0.0021% |
37 | BitMart | ETH-USDT | $1.00 0.0002567 Eth | $267,969,153.00 68,806.784 ETH | 0.0000% |
38 | KuCoin | XRP-USDT | $1.00 0.0002565 Eth | $263,828,798.00 108,863,966.806 XRP | 0.0009% |
39 | Binance | PEPE-USDT | $0.9995 0.0002572 Eth | $260,091,328.00 11,165,248,956,419.000 PEPE | 87.8901% |
40 | Binance | LINK-USDT | $0.9996 0.0002571 Eth | $255,003,144.00 8,682,898.940 LINK | 0.0001% |
41 | XT.COM | ETH-USDT | $0.9996 0.0002570 Eth | $254,525,941.00 65,803.220 ETH | 0.0000% |
42 | OKX | DOGE-USDT | $0.9996 0.0002564 Eth | $245,687,007.00 620,088,593.470 DOGE | 0.0049% |
43 | Binance | FLOKI-USDT | $0.9991 0.0002568 Eth | $237,821,234.00 1,008,059,768,781.000 FLOKI | 7.9352% |
44 | Binance | SUI-USDT | $0.9992 0.0002572 Eth | $230,595,311.00 51,495,538.900 SUI | 0.0004% |
45 | Tapbit | BTC-USDT | $0.9996 0.0002570 Eth | $200,559,089.00 1,965.932 BTC | 0.0000% |
46 | HTX | BTC-USDT | $0.9996 0.0002564 Eth | $195,636,705.00 1,918.110 BTC | 0.0000% |
47 | Biconomy.com | BTC-USDT | $0.9996 0.0002573 Eth | $195,231,917.00 1,916.325 BTC | 0.0000% |
48 | Bybit | USDC-USDT | $0.9996 0.0002564 Eth | $189,008,953.00 189,038,708.770 USDC | 0.0015% |
49 | Binance | BNB-USDT | $0.9996 0.0002569 Eth | $187,600,759.00 263,427.888 BNB | 0.0000% |
50 | BigONE | BTC-USDT | $0.9996 0.0002564 Eth | $186,898,900.00 1,816.543 BTC | 0.0000% |
51 | Bitunix | ETH-USDT | $0.9996 0.0002570 Eth | $178,115,828.00 45,757.496 ETH | 0.0000% |
52 | LATOKEN | BTC-USDT | $0.9995 0.0002565 Eth | $175,466,387.00 1,705.599 BTC | 0.0000% |
53 | Bybit | SOL-USDT | $0.9996 0.0002564 Eth | $165,674,072.00 756,147.452 SOL | 0.0000% |
54 | LBank | ETH-USDT | $0.9999 0.0002568 Eth | $160,268,926.00 41,147.489 ETH | 0.0000% |
55 | Binance | ADA-USDT | $0.9996 0.0002571 Eth | $139,511,552.00 130,650,694.900 ADA | 0.0010% |
56 | Bitget | DOGE-USDT | $0.9996 0.0002564 Eth | $137,721,790.00 347,443,450.360 DOGE | 0.0027% |
57 | Bitget | XRP-USDT | $0.9996 0.0002564 Eth | $134,623,367.00 55,978,323.047 XRP | 0.0004% |
58 | WhiteBIT | XRP-USDT | $0.9996 0.0002564 Eth | $132,586,378.00 54,730,912.620 XRP | 0.0004% |
59 | LATOKEN | ETH-USDT | $0.9996 0.0002566 Eth | $130,000,579.00 33,368.524 ETH | 0.0000% |
60 | Bybit | XRP-USDT | $0.9996 0.0002564 Eth | $129,029,214.00 53,665,497.090 XRP | 0.0004% |
61 | Biconomy.com | ETH-USDT | $0.9996 0.0002570 Eth | $128,663,540.00 33,254.824 ETH | 0.0000% |
62 | KuCoin | BTC-USDT | $1.00 0.0002565 Eth | $128,551,340.00 1,249.003 BTC | 0.0000% |
63 | Uniswap V3 (Ethereum) | 0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2-0XDAC17F958D2EE523A2206206994597C13D831EC7 | $0.9998 0.0002566 Eth | $127,949,622.00 33,196.118 0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | 0.0000% |
64 | KuCoin | ETH-USDT | $1.00 0.0002565 Eth | $124,306,433.00 31,893.394 ETH | 0.0000% |
65 | Gate.io | ENA-USDT | $0.9995 0.0002565 Eth | $122,783,446.00 111,943,673.280 ENA | 0.0009% |
66 | Hotcoin | ETH-USDT | $0.9997 0.0002566 Eth | $118,370,847.00 30,381.238 ETH | 0.0000% |
67 | Gate.io | FLOKI-USDT | $0.9995 0.0002565 Eth | $116,735,029.00 487,838,470,030.000 FLOKI | 3.8401% |
68 | OKX | SOL-USDT | $0.9996 0.0002564 Eth | $115,118,463.00 525,107.943 SOL | 0.0000% |
69 | Binance | AAVE-USDT | $0.9996 0.0002567 Eth | $110,938,485.00 302,183.010 AAVE | 0.0000% |
70 | MEXC | DOGE-USDT | $0.9996 0.0002564 Eth | $101,821,169.00 252,530,000.570 DOGE | 0.0020% |
71 | LBank | DOGE-USDT | $0.9999 0.0002568 Eth | $101,260,765.00 251,288,257.000 DOGE | 0.0020% |
72 | WhiteBIT | DOGE-USDT | $0.9995 0.0002567 Eth | $100,582,504.00 249,808,950.800 DOGE | 0.0020% |
73 | WEEX | XRP-USDT | $0.9995 0.0002572 Eth | $100,063,708.00 41,421,335.009 XRP | 0.0003% |
74 | WhiteBIT | LINK-USDT | $0.9995 0.0002565 Eth | $99,385,870.00 3,439,405.060 LINK | 0.0000% |
75 | Binance | HBAR-USDT | $0.9996 0.0002569 Eth | $96,062,681.00 329,539,665.000 HBAR | 0.0026% |
76 | OKX | XRP-USDT | $0.9996 0.0002564 Eth | $95,413,003.00 39,658,360.938 XRP | 0.0003% |
77 | Binance | PNUT-USDT | $1.00 0.0002567 Eth | $94,117,693.00 82,380,183.900 PNUT | 0.0006% |
78 | Gate.io | XRP-USDT | $0.9996 0.0002564 Eth | $93,749,051.00 38,978,626.740 XRP | 0.0003% |
79 | Binance | UNI-USDT | $0.9998 0.0002566 Eth | $93,747,207.00 5,628,660.950 UNI | 0.0000% |
80 | CoinW | DOGE-USDT | $0.9994 0.0002573 Eth | $92,141,643.00 229,157,872.511 DOGE | 0.0018% |
81 | Bybit | DOGE-USDT | $0.9996 0.0002564 Eth | $89,782,511.00 226,613,779.500 DOGE | 0.0018% |
82 | Bybit | MNT-USDT | $0.9996 0.0002564 Eth | $89,620,636.00 73,303,213.500 MNT | 0.0006% |
83 | WhiteBIT | SUI-USDT | $0.9999 0.0002568 Eth | $89,618,232.00 19,481,800.813 SUI | 0.0002% |
84 | MEXC | MX-USDT | $0.9997 0.0002570 Eth | $86,007,575.00 23,567,418.520 MX | 0.0002% |
85 | DigiFinex | DOGE-USDT | $1.00 0.0002565 Eth | $82,281,381.00 204,005,781.050 DOGE | 0.0016% |
86 | Binance | LTC-USDT | $0.9995 0.0002572 Eth | $81,313,030.00 690,787.628 LTC | 0.0000% |
87 | HTX | DOGE-USDT | $1.00 0.0002565 Eth | $79,911,277.00 201,713,227.322 DOGE | 0.0016% |
88 | Bitget | SOL-USDT | $0.9996 0.0002564 Eth | $76,368,411.00 348,294.367 SOL | 0.0000% |
89 | Gate.io | SUI-USDT | $0.9995 0.0002565 Eth | $70,763,756.00 15,840,611.880 SUI | 0.0001% |
90 | Bitget | USDC-USDT | $0.9996 0.0002564 Eth | $69,796,975.00 69,815,650.883 USDC | 0.0005% |
91 | BYDFi | BTC-USDT | $0.9999 0.0002570 Eth | $67,873,802.00 660.162 BTC | 0.0000% |
92 | DigiFinex | TRX-USDT | $0.9996 0.0002564 Eth | $65,332,967.00 228,793,693.400 TRX | 0.0018% |
93 | Bitunix | DOGE-USDT | $0.9996 0.0002570 Eth | $63,606,949.00 158,039,498.000 DOGE | 0.0012% |
94 | WhiteBIT | ADA-USDT | $0.9995 0.0002565 Eth | $58,909,303.00 54,185,666.760 ADA | 0.0004% |
95 | HTX | ETH-USDT | $1.00 0.0002565 Eth | $58,867,361.00 15,221.334 ETH | 0.0000% |
96 | OKX | SUI-USDT | $0.9996 0.0002564 Eth | $56,482,527.00 12,606,630.879 SUI | 0.0001% |
97 | Binance | NEIRO-USDT | $0.9998 0.0002566 Eth | $56,065,787.00 35,036,389,892.000 NEIRO | 0.2758% |
98 | KuCoin | SOL-USDT | $0.9996 0.0002564 Eth | $49,840,050.00 225,662.151 SOL | 0.0000% |
99 | BingX | BTC-USDT | $0.9996 0.0002564 Eth | $44,543,959.00 436.987 BTC | 0.0000% |
100 | BingX | ETH-USDT | $0.9996 0.0002564 Eth | $43,232,394.00 11,178.442 ETH | 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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