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Overview
Max Total Supply
76,928,104,353.364467 USDT
Holders
6,553,978 ( 0.016%)
Market
Price
$1.00 @ 0.000259 ETH (-0.13%)
Onchain Market Cap
$76,812,173,700.10
Circulating Supply Market Cap
$140,160,708,700.00
Other Info
Token Contract (WITH 6 Decimals)
Balance
5,870.15146 USDTValue
$5,861.31 ( ~1.5196 Eth) [0.0000%]Loading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | BTC-USDT | $0.9997 0.0002585 Eth | $1,676,245,554.00 16,358.417 BTC | 0.0000% |
2 | CoinW | BTC-USDT | $0.9988 0.0002581 Eth | $1,347,120,931.00 13,109.992 BTC | 0.0000% |
3 | BVOX | BTC-USDT | $0.9998 0.0002574 Eth | $1,296,056,781.00 12,651.146 BTC | 0.0000% |
4 | Binance | FDUSD-USDT | $0.9997 0.0002585 Eth | $1,110,149,054.00 1,110,318,636.000 FDUSD | 0.3250% |
5 | Ourbit | BTC-USDT | $0.9997 0.0002581 Eth | $991,279,152.00 9,674.426 BTC | 0.0000% |
6 | Toobit | BTC-USDT | $0.9996 0.0002567 Eth | $945,882,155.00 9,223.285 BTC | 0.0000% |
7 | AscendEX (BitMax) | BTC-USDT | $0.9996 0.0002585 Eth | $943,663,349.00 9,181.705 BTC | 0.0000% |
8 | Binance | ETH-USDT | $0.9999 0.0002577 Eth | $780,824,388.00 201,164.508 ETH | 0.0001% |
9 | DigiFinex | BTC-USDT | $0.9997 0.0002585 Eth | $705,926,488.00 6,866.203 BTC | 0.0000% |
10 | OrangeX | ETH-USDT | $0.9997 0.0002581 Eth | $682,242,636.00 175,666.835 ETH | 0.0001% |
11 | Tapbit | ETH-USDT | $0.9987 0.0002582 Eth | $621,087,001.00 160,159.352 ETH | 0.0000% |
12 | WhiteBIT | BTC-USDT | $0.9997 0.0002579 Eth | $550,590,400.00 5,346.881 BTC | 0.0000% |
13 | Binance | XRP-USDT | $0.9987 0.0002582 Eth | $543,216,394.00 225,301,562.000 XRP | 0.0659% |
14 | Toobit | ETH-USDT | $0.9998 0.0002579 Eth | $533,640,645.00 137,472.871 ETH | 0.0000% |
15 | AscendEX (BitMax) | ETH-USDT | $0.9996 0.0002585 Eth | $509,534,386.00 131,980.330 ETH | 0.0000% |
16 | OKX | BTC-USDT | $0.9997 0.0002585 Eth | $483,054,456.00 4,714.969 BTC | 0.0000% |
17 | MEXC | BTC-USDT | $0.9998 0.0002585 Eth | $467,307,325.00 4,543.982 BTC | 0.0000% |
18 | Binance | DOGE-USDT | $0.9997 0.0002585 Eth | $414,472,089.00 1,039,087,430.000 DOGE | 0.3042% |
19 | BitMart | BTC-USDT | $0.9997 0.0002581 Eth | $389,014,647.00 3,775.264 BTC | 0.0000% |
20 | XT.COM | BTC-USDT | $0.9995 0.0002561 Eth | $377,507,183.00 3,687.306 BTC | 0.0000% |
21 | Bitunix | BTC-USDT | $0.9997 0.0002579 Eth | $375,876,591.00 3,650.059 BTC | 0.0000% |
22 | BVOX | ETH-USDT | $0.9997 0.0002574 Eth | $366,023,748.00 94,313.533 ETH | 0.0000% |
23 | Hotcoin | BTC-USDT | $0.9997 0.0002581 Eth | $365,495,658.00 3,552.875 BTC | 0.0000% |
24 | LBank | BTC-USDT | $0.9996 0.0002567 Eth | $336,220,201.00 3,260.874 BTC | 0.0000% |
25 | Deepcoin | ETH-USDT | $0.9997 0.0002574 Eth | $317,251,488.00 82,920.885 ETH | 0.0000% |
26 | P2B | ETH-USDT | $0.9997 0.0002567 Eth | $309,144,427.00 79,426.682 ETH | 0.0000% |
27 | MEXC | ETH-USDT | $0.9998 0.0002585 Eth | $302,593,463.00 78,299.479 ETH | 0.0000% |
28 | CoinW | ETH-USDT | $0.9996 0.0002567 Eth | $301,781,182.00 77,581.438 ETH | 0.0000% |
29 | Ourbit | ETH-USDT | $0.9998 0.0002585 Eth | $278,097,609.00 71,633.919 ETH | 0.0000% |
30 | KuCoin | XRP-USDT | $0.9987 0.0002582 Eth | $249,036,144.00 103,968,654.976 XRP | 0.0304% |
31 | Binance | SUI-USDT | $0.9999 0.0002574 Eth | $228,867,112.00 50,264,782.600 SUI | 0.0147% |
32 | BitMart | ETH-USDT | $0.9997 0.0002581 Eth | $225,139,951.00 58,126.168 ETH | 0.0000% |
33 | Gate.io | BTC-USDT | $0.9997 0.0002585 Eth | $218,755,653.00 2,134.321 BTC | 0.0000% |
34 | HTX | BTC-USDT | $0.9997 0.0002585 Eth | $210,295,427.00 2,051.120 BTC | 0.0000% |
35 | Tapbit | BTC-USDT | $0.9996 0.0002585 Eth | $207,023,210.00 2,020.479 BTC | 0.0000% |
36 | BTSE | BTC-USDT | $0.9997 0.0002581 Eth | $202,289,364.00 1,966.503 BTC | 0.0000% |
37 | Coinbase Exchange | USDT-USD | $0.9997 0.0002585 Eth | $199,993,181.00 200,045,192.910 USDT | 0.0586% |
38 | Biconomy.com | BTC-USDT | $0.9994 0.0002578 Eth | $198,375,640.00 1,938.314 BTC | 0.0000% |
39 | BigONE | BTC-USDT | $0.9988 0.0002581 Eth | $192,475,562.00 1,873.060 BTC | 0.0000% |
40 | Binance | LINK-USDT | $0.9997 0.0002585 Eth | $186,808,440.00 6,432,752.950 LINK | 0.0019% |
41 | LATOKEN | BTC-USDT | $0.9997 0.0002581 Eth | $174,850,531.00 1,700.045 BTC | 0.0000% |
42 | Binance | BNB-USDT | $0.9997 0.0002585 Eth | $172,385,471.00 241,351.820 BNB | 0.0001% |
43 | Bitunix | ETH-USDT | $0.9997 0.0002579 Eth | $154,681,325.00 39,910.844 ETH | 0.0000% |
44 | LBank | ETH-USDT | $0.9997 0.0002569 Eth | $148,429,027.00 38,288.956 ETH | 0.0000% |
45 | KuCoin | BTC-USDT | $0.9987 0.0002582 Eth | $143,953,330.00 1,400.890 BTC | 0.0000% |
46 | Bybit | SOL-USDT | $0.9997 0.0002585 Eth | $138,479,251.00 630,382.477 SOL | 0.0002% |
47 | LBank | SOL-USDT | $0.9987 0.0002582 Eth | $138,072,242.00 631,720.697 SOL | 0.0002% |
48 | Binance | COW-USDT | $0.9994 0.0002577 Eth | $136,634,792.00 162,244,569.200 COW | 0.0475% |
49 | Binance | ADA-USDT | $0.9997 0.0002585 Eth | $122,689,219.00 114,202,567.500 ADA | 0.0334% |
50 | Hotcoin | ETH-USDT | $0.9997 0.0002581 Eth | $121,446,884.00 31,366.762 ETH | 0.0000% |
51 | Bitget | XRP-USDT | $0.9997 0.0002585 Eth | $120,180,421.00 49,786,943.084 XRP | 0.0146% |
52 | Gate.io | ETH-USDT | $0.9997 0.0002585 Eth | $119,864,405.00 30,902.653 ETH | 0.0000% |
53 | Bybit | XRP-USDT | $0.9997 0.0002585 Eth | $119,752,946.00 49,614,997.210 XRP | 0.0145% |
54 | Bitget | DOGE-USDT | $0.9997 0.0002585 Eth | $119,221,285.00 298,448,538.947 DOGE | 0.0874% |
55 | WhiteBIT | SOL-USDT | $0.9997 0.0002567 Eth | $117,273,169.00 531,967.227 SOL | 0.0002% |
56 | Biconomy.com | ETH-USDT | $0.9987 0.0002582 Eth | $117,194,942.00 30,226.695 ETH | 0.0000% |
57 | KuCoin | ETH-USDT | $0.9987 0.0002582 Eth | $115,625,014.00 29,947.751 ETH | 0.0000% |
58 | WhiteBIT | XRP-USDT | $0.9994 0.0002578 Eth | $114,351,789.00 47,651,554.250 XRP | 0.0139% |
59 | Binance | AAVE-USDT | $0.9997 0.0002574 Eth | $110,506,538.00 300,522.504 AAVE | 0.0001% |
60 | BTSE | ETH-USDT | $0.9998 0.0002574 Eth | $110,203,444.00 28,404.113 ETH | 0.0000% |
61 | LATOKEN | ETH-USDT | $0.9998 0.0002574 Eth | $109,816,841.00 28,283.823 ETH | 0.0000% |
62 | Binance | FTM-USDT | $0.9987 0.0002582 Eth | $108,820,147.00 83,304,788.000 FTM | 0.0244% |
63 | Binance | ACT-USDT | $0.9997 0.0002581 Eth | $104,726,655.00 190,188,974.600 ACT | 0.0557% |
64 | Gate.io | ENA-USDT | $0.9987 0.0002582 Eth | $98,455,839.00 86,068,240.540 ENA | 0.0252% |
65 | Binance | DOT-USDT | $0.9997 0.0002585 Eth | $98,274,502.00 11,145,323.540 DOT | 0.0033% |
66 | LBank | DOGE-USDT | $0.9995 0.0002580 Eth | $93,395,305.00 233,473,980.000 DOGE | 0.0683% |
67 | Gate.io | XRP-USDT | $0.9997 0.0002585 Eth | $88,623,748.00 36,742,958.150 XRP | 0.0108% |
68 | OKX | XRP-USDT | $0.9997 0.0002585 Eth | $88,297,842.00 36,572,733.894 XRP | 0.0107% |
69 | Binance | HBAR-USDT | $0.9997 0.0002585 Eth | $86,084,988.00 295,591,165.000 HBAR | 0.0865% |
70 | Kraken | USDT-USD | $0.9998 0.0002585 Eth | $84,266,041.00 84,285,426.883 USDT | 0.0247% |
71 | Binance | PNUT-USDT | $0.9997 0.0002581 Eth | $83,795,444.00 73,124,916.200 PNUT | 0.0214% |
72 | MEXC | DOGE-USDT | $0.9998 0.0002585 Eth | $78,331,877.00 196,044,194.260 DOGE | 0.0574% |
73 | Bybit | DOGE-USDT | $0.9997 0.0002585 Eth | $77,564,511.00 194,165,295.700 DOGE | 0.0568% |
74 | CoinW | DOGE-USDT | $0.9998 0.0002580 Eth | $75,189,532.00 187,761,689.215 DOGE | 0.0550% |
75 | Gate.io | FLOKI-USDT | $0.9997 0.0002585 Eth | $71,920,102.00 302,440,871,756.000 FLOKI | 88.5276% |
76 | MEXC | MX-USDT | $0.9998 0.0002585 Eth | $71,448,636.00 19,811,520.890 MX | 0.0058% |
77 | Gate.io | SUI-USDT | $0.9997 0.0002585 Eth | $70,939,150.00 15,636,882.120 SUI | 0.0046% |
78 | BYDFi | BTC-USDT | $0.9995 0.0002580 Eth | $68,883,242.00 669.809 BTC | 0.0000% |
79 | HTX | DOGE-USDT | $0.9997 0.0002585 Eth | $66,263,775.00 166,111,645.803 DOGE | 0.0486% |
80 | Binance | LTC-USDT | $0.9997 0.0002585 Eth | $66,225,220.00 561,024.578 LTC | 0.0002% |
81 | Dex-Trade | BTC-USDT | $0.9996 0.0002574 Eth | $64,030,796.00 620.872 BTC | 0.0000% |
82 | Gate.io | DOGE-USDT | $0.9997 0.0002585 Eth | $63,021,137.00 157,962,337.540 DOGE | 0.0462% |
83 | Binance | AVA-USDT | $0.9997 0.0002585 Eth | $60,220,793.00 29,285,456.600 AVA | 0.0086% |
84 | Gate.io | ONDO-USDT | $0.9987 0.0002582 Eth | $60,163,886.00 32,226,842.580 ONDO | 0.0094% |
85 | WhiteBIT | ENA-USDT | $0.9987 0.0002582 Eth | $59,289,402.00 51,239,964.720 ENA | 0.0150% |
86 | Bitget | SUI-USDT | $0.9997 0.0002585 Eth | $56,427,461.00 12,369,337.080 SUI | 0.0036% |
87 | Binance | ARB-USDT | $0.9997 0.0002579 Eth | $55,039,713.00 55,560,752.400 ARB | 0.0163% |
88 | LBank | XRP-USDT | $0.9996 0.0002567 Eth | $54,440,575.00 22,605,123.520 XRP | 0.0066% |
89 | Binance | NEIRO-USDT | $0.9987 0.0002582 Eth | $53,504,217.00 33,262,109,423.000 NEIRO | 9.7362% |
90 | Bitunix | XRP-USDT | $0.9997 0.0002579 Eth | $51,908,756.00 21,619,353.000 XRP | 0.0063% |
91 | HTX | ETH-USDT | $0.9996 0.0002585 Eth | $50,274,364.00 12,956.176 ETH | 0.0000% |
92 | Bitunix | DOGE-USDT | $0.9997 0.0002579 Eth | $49,366,719.00 123,054,288.000 DOGE | 0.0360% |
93 | CoinEx | BTC-USDT | $0.9997 0.0002581 Eth | $48,174,589.00 470.115 BTC | 0.0000% |
94 | KuCoin | SOL-USDT | $0.9987 0.0002582 Eth | $46,291,047.00 211,798.885 SOL | 0.0001% |
95 | MEXC | SOL-USDT | $0.9998 0.0002585 Eth | $44,725,159.00 204,377.040 SOL | 0.0001% |
96 | Ourbit | XRP-USDT | $0.9996 0.0002585 Eth | $44,397,006.00 18,398,330.060 XRP | 0.0054% |
97 | BingX | ETH-USDT | $0.9997 0.0002585 Eth | $39,601,545.00 10,205.012 ETH | 0.0000% |
98 | CoinW | SOL-USDT | $0.9996 0.0002567 Eth | $38,641,853.00 175,385.440 SOL | 0.0001% |
99 | Bybit | APEX-USDT | $0.9997 0.0002585 Eth | $36,908,691.00 19,399,784.190 APEX | 0.0057% |
100 | Azbit | XRP-USDT | $0.9994 0.0002578 Eth | $36,362,163.00 15,071,853.640 XRP | 0.0044% |
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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