Overview
Max Total Supply
54,940,840,345.993792 USDT
Holders
6,285,615 ( -0.015%)
Market
Price
$1.00 @ 0.000410 ETH (+0.03%)
Onchain Market Cap
$54,937,928,481.46
Circulating Supply Market Cap
$120,486,321,459.00
Other Info
Token Contract (WITH 6 Decimals)
Balance
573.5 USDTValue
$573.47 ( ~0.234883432400666 Eth) [0.0000%]Loading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | BTC-USDT | $0.9996 0.0004087 Eth | $2,088,853,001.00 30,676.119 BTC | 0.0000% |
2 | Hotcoin | BTC-USDT | $0.9998 0.0004093 Eth | $1,747,451,430.00 25,401.249 BTC | 0.0000% |
3 | WEEX | BTC-USDT | $0.9995 0.0004101 Eth | $1,605,994,060.00 23,608.257 BTC | 0.0000% |
4 | CoinW | BTC-USDT | $0.9998 0.0004092 Eth | $1,559,786,304.00 22,674.114 BTC | 0.0000% |
5 | Bybit | BTC-USDT | $1.00 0.0004089 Eth | $1,476,718,952.00 21,653.798 BTC | 0.0000% |
6 | BVOX | BTC-USDT | $0.9995 0.0004090 Eth | $1,370,240,734.00 20,083.777 BTC | 0.0000% |
7 | Toobit | BTC-USDT | $1.00 0.0004090 Eth | $1,172,321,278.00 17,197.029 BTC | 0.0000% |
8 | Pionex | BTC-USDT | $1.00 0.0004090 Eth | $1,058,092,516.00 15,516.789 BTC | 0.0000% |
9 | BitMart | BTC-USDT | $0.9996 0.0004087 Eth | $955,918,885.00 13,875.634 BTC | 0.0000% |
10 | OrangeX | BTC-USDT | $1.00 0.0004090 Eth | $897,649,190.00 13,166.854 BTC | 0.0000% |
11 | Binance | ETH-USDT | $0.9998 0.0004088 Eth | $819,684,261.00 338,923.462 ETH | 0.0000% |
12 | Deepcoin | BTC-USDT | $0.9995 0.0004090 Eth | $654,268,747.00 9,650.251 BTC | 0.0000% |
13 | WhiteBIT | BTC-USDT | $1.00 0.0004093 Eth | $634,482,206.00 9,208.494 BTC | 0.0000% |
14 | Tapbit | ETH-USDT | $0.9998 0.0004092 Eth | $600,222,811.00 248,027.823 ETH | 0.0000% |
15 | BitMart | ETH-USDT | $0.9996 0.0004087 Eth | $599,563,803.00 245,078.789 ETH | 0.0000% |
16 | OKX | BTC-USDT | $0.9996 0.0004087 Eth | $591,718,451.00 8,689.671 BTC | 0.0000% |
17 | WEEX | ETH-USDT | $0.9995 0.0004090 Eth | $578,403,027.00 239,094.330 ETH | 0.0000% |
18 | Hotcoin | ETH-USDT | $0.9998 0.0004093 Eth | $552,094,473.00 225,983.902 ETH | 0.0000% |
19 | Toobit | ETH-USDT | $1.00 0.0004103 Eth | $548,478,784.00 226,658.415 ETH | 0.0000% |
20 | Bitunix | BTC-USDT | $0.9995 0.0004092 Eth | $529,331,511.00 7,696.459 BTC | 0.0000% |
21 | Binance | DOGE-USDT | $1.00 0.0004090 Eth | $516,126,980.00 3,184,754,672.000 DOGE | 0.0637% |
22 | Bybit | ETH-USDT | $1.00 0.0004089 Eth | $514,600,217.00 212,441.852 ETH | 0.0000% |
23 | AscendEX (BitMax) | BTC-USDT | $1.00 0.0004089 Eth | $474,277,746.00 6,879.759 BTC | 0.0000% |
24 | LBank | BTC-USDT | $1.00 0.0004089 Eth | $447,117,184.00 6,486.017 BTC | 0.0000% |
25 | BVOX | ETH-USDT | $0.9996 0.0004094 Eth | $439,688,280.00 181,167.056 ETH | 0.0000% |
26 | XT.COM | BTC-USDT | $0.9996 0.0004087 Eth | $427,159,252.00 6,272.049 BTC | 0.0000% |
27 | FameEX | ETH-USDT | $0.9995 0.0004090 Eth | $342,159,034.00 141,498.501 ETH | 0.0000% |
28 | P2B | ETH-USDT | $1.001 0.0004090 Eth | $311,867,465.00 127,362.286 ETH | 0.0000% |
29 | MEXC | ETH-USDT | $0.9996 0.0004087 Eth | $308,541,486.00 126,284.580 ETH | 0.0000% |
30 | WhiteBIT | ETH-USDT | $0.9997 0.0004099 Eth | $300,247,833.00 123,075.659 ETH | 0.0000% |
31 | DigiFinex | ETH-USDT | $1.001 0.0004090 Eth | $290,608,880.00 118,674.276 ETH | 0.0000% |
32 | OrangeX | ETH-USDT | $1.00 0.0004090 Eth | $288,994,333.00 119,210.265 ETH | 0.0000% |
33 | OKX | ETH-USDT | $1.00 0.0004090 Eth | $270,351,555.00 111,889.015 ETH | 0.0000% |
34 | AscendEX (BitMax) | ETH-USDT | $1.00 0.0004089 Eth | $259,853,663.00 106,136.152 ETH | 0.0000% |
35 | CoinW | ETH-USDT | $0.9993 0.0004091 Eth | $255,737,635.00 104,686.184 ETH | 0.0000% |
36 | Tapbit | BTC-USDT | $0.9998 0.0004091 Eth | $254,531,177.00 3,737.668 BTC | 0.0000% |
37 | BigONE | BTC-USDT | $0.9996 0.0004104 Eth | $250,464,707.00 3,645.065 BTC | 0.0000% |
38 | XT.COM | ETH-USDT | $0.9998 0.0004091 Eth | $227,253,106.00 93,955.278 ETH | 0.0000% |
39 | Bitget | BTC-USDT | $0.9996 0.0004087 Eth | $224,034,052.00 3,283.232 BTC | 0.0000% |
40 | Gate.io | BTC-USDT | $1.001 0.0004090 Eth | $223,251,952.00 3,279.684 BTC | 0.0000% |
41 | LATOKEN | BTC-USDT | $1.00 0.0004093 Eth | $218,004,426.00 3,165.088 BTC | 0.0000% |
42 | Biconomy.com | BTC-USDT | $0.9992 0.0004088 Eth | $216,121,772.00 3,172.481 BTC | 0.0000% |
43 | OKX | DOGE-USDT | $1.001 0.0004090 Eth | $194,217,560.00 1,196,998,085.727 DOGE | 0.0239% |
44 | Bitunix | ETH-USDT | $0.9995 0.0004092 Eth | $186,367,425.00 76,321.555 ETH | 0.0000% |
45 | Fastex | BTC-USDT | $0.9995 0.0004090 Eth | $186,211,226.00 2,703.075 BTC | 0.0000% |
46 | BTSE | BTC-USDT | $1.00 0.0004093 Eth | $181,849,826.00 2,639.295 BTC | 0.0000% |
47 | LBank | ETH-USDT | $1.00 0.0004089 Eth | $169,353,781.00 69,177.785 ETH | 0.0000% |
48 | Coinstore | BTC-USDT | $0.9992 0.0004088 Eth | $148,799,948.00 2,184.311 BTC | 0.0000% |
49 | Binance | SUI-USDT | $0.9995 0.0004097 Eth | $147,481,891.00 78,366,671.600 SUI | 0.0016% |
50 | KuCoin | BTC-USDT | $1.001 0.0004090 Eth | $146,998,139.00 2,133.398 BTC | 0.0000% |
51 | Hotcoin | DOGE-USDT | $0.9997 0.0004104 Eth | $146,919,099.00 862,786,325.457 DOGE | 0.0172% |
52 | FameEX | USDC-USDT | $0.9995 0.0004090 Eth | $139,700,798.00 139,693,510.200 USDC | 0.0028% |
53 | Gate.io | DOGE-USDT | $1.001 0.0004090 Eth | $139,500,173.00 859,333,739.200 DOGE | 0.0172% |
54 | Binance | BNB-USDT | $1.00 0.0004090 Eth | $136,415,764.00 245,558.406 BNB | 0.0000% |
55 | Bitget | DOGE-USDT | $0.9996 0.0004087 Eth | $134,239,429.00 836,357,473.042 DOGE | 0.0167% |
56 | Bitget | ETH-USDT | $0.9996 0.0004087 Eth | $132,497,007.00 54,668.295 ETH | 0.0000% |
57 | FameEX | SOL-USDT | $0.9996 0.0004087 Eth | $129,285,874.00 806,944.122 SOL | 0.0000% |
58 | Binance | NEIRO-USDT | $0.9999 0.0004100 Eth | $120,241,187.00 92,767,178,180.000 NEIRO | 1.8544% |
59 | Biconomy.com | ETH-USDT | $1.00 0.0004090 Eth | $119,599,790.00 49,344.725 ETH | 0.0000% |
60 | Dex-Trade | BTC-USDT | $0.9998 0.0004091 Eth | $119,217,037.00 1,730.230 BTC | 0.0000% |
61 | ProBit Global | BTC-USDT | $0.9992 0.0004088 Eth | $118,392,244.00 1,720.668 BTC | 0.0000% |
62 | Coinstore | ETH-USDT | $0.9996 0.0004088 Eth | $112,693,205.00 46,512.178 ETH | 0.0000% |
63 | WhiteBIT | DOGE-USDT | $1.001 0.0004090 Eth | $112,619,660.00 662,785,974.000 DOGE | 0.0132% |
64 | LATOKEN | ETH-USDT | $0.9995 0.0004096 Eth | $111,121,546.00 45,548.019 ETH | 0.0000% |
65 | Binance | WIF-USDT | $1.00 0.0004090 Eth | $110,255,139.00 55,390,828.830 WIF | 0.0011% |
66 | Binance | RUNE-USDT | $1.00 0.0004090 Eth | $106,004,802.00 23,523,683.100 RUNE | 0.0005% |
67 | WhiteBIT | SOL-USDT | $1.001 0.0004090 Eth | $103,396,647.00 631,059.041 SOL | 0.0000% |
68 | Binance | XRP-USDT | $1.00 0.0004090 Eth | $101,715,972.00 200,075,564.000 XRP | 0.0040% |
69 | Bybit | DOGE-USDT | $1.00 0.0004089 Eth | $99,946,375.00 619,635,393.200 DOGE | 0.0124% |
70 | LBank | SOL-USDT | $0.9996 0.0004099 Eth | $96,122,923.00 589,469.557 SOL | 0.0000% |
71 | FameEX | DOGE-USDT | $1.00 0.0004097 Eth | $78,265,095.00 483,302,999.798 DOGE | 0.0097% |
72 | Bitunix | DOGE-USDT | $0.9995 0.0004092 Eth | $74,885,652.00 440,178,109.000 DOGE | 0.0088% |
73 | Bitget | SOL-USDT | $0.9996 0.0004087 Eth | $73,215,993.00 457,103.518 SOL | 0.0000% |
74 | BTSE | ETH-USDT | $1.001 0.0004090 Eth | $70,254,744.00 28,712.100 ETH | 0.0000% |
75 | DigiFinex | DOGE-USDT | $1.001 0.0004090 Eth | $65,725,514.00 386,640,616.220 DOGE | 0.0077% |
76 | CoinW | DOGE-USDT | $0.9998 0.0004092 Eth | $65,124,188.00 383,135,849.958 DOGE | 0.0077% |
77 | Bybit | MNT-USDT | $1.00 0.0004090 Eth | $62,844,173.00 113,194,499.260 MNT | 0.0023% |
78 | HTX | DOGE-USDT | $1.001 0.0004090 Eth | $60,196,812.00 372,229,325.919 DOGE | 0.0074% |
79 | Bitget | BGB-USDT | $0.9996 0.0004087 Eth | $60,120,764.00 53,665,807.745 BGB | 0.0011% |
80 | Slex | BTC-USDT | $0.9996 0.0004104 Eth | $56,977,637.00 836.563 BTC | 0.0000% |
81 | Bitunix | SOL-USDT | $0.9997 0.0004092 Eth | $54,300,092.00 331,981.980 SOL | 0.0000% |
82 | Coinbase Exchange | BTC-USDT | $1.00 0.0004090 Eth | $54,037,758.00 783.822 BTC | 0.0000% |
83 | MEXC | MX-USDT | $0.9998 0.0004092 Eth | $52,508,115.00 19,486,962.500 MX | 0.0004% |
84 | Deepcoin | UXLINK-USDT | $0.9995 0.0004100 Eth | $50,124,707.00 92,340,013.800 UXLINK | 0.0018% |
85 | BTSE | SOL-USDT | $1.001 0.0004090 Eth | $45,204,767.00 275,945.192 SOL | 0.0000% |
86 | MEXC | DOGE-USDT | $1.00 0.0004089 Eth | $44,638,748.00 262,149,119.710 DOGE | 0.0052% |
87 | BingX | BTC-USDT | $1.00 0.0004090 Eth | $41,250,862.00 604.203 BTC | 0.0000% |
88 | WEEX | DOGE-USDT | $0.9995 0.0004091 Eth | $41,123,133.00 255,164,266.031 DOGE | 0.0051% |
89 | BVOX | DOGE-USDT | $1.00 0.0004097 Eth | $40,477,369.00 249,207,832.000 DOGE | 0.0050% |
90 | Gate.io | PEPE-USDT | $0.9998 0.0004091 Eth | $39,487,789.00 4,897,532,174,074.000 PEPE | 97.8998% |
91 | HashKey Global | BTC-USDT | $1.001 0.0004093 Eth | $38,001,525.00 555.591 BTC | 0.0000% |
92 | Gate.io | SUI-USDT | $0.9998 0.0004091 Eth | $37,142,593.00 19,819,758.630 SUI | 0.0004% |
93 | Coinbase Exchange | USDT-USDC | $0.9999 0.0004088 Eth | $36,283,666.00 36,287,540.730 USDT | 0.0007% |
94 | LBank | DOGE-USDT | $0.9996 0.0004099 Eth | $33,273,792.00 194,807,074.000 DOGE | 0.0039% |
95 | XT.COM | DOGE-USDT | $0.9998 0.0004091 Eth | $31,395,143.00 193,856,489.000 DOGE | 0.0039% |
96 | Gate.io | SOL-USDT | $1.00 0.0004090 Eth | $30,370,640.00 189,204.912 SOL | 0.0000% |
97 | WhiteBIT | LINK-USDT | $0.9998 0.0004091 Eth | $30,282,858.00 2,850,856.440 LINK | 0.0001% |
98 | KuCoin | SOL-USDT | $1.001 0.0004090 Eth | $27,270,299.00 166,467.134 SOL | 0.0000% |
99 | BingX | ETH-USDT | $1.00 0.0004090 Eth | $25,592,438.00 10,555.171 ETH | 0.0000% |
100 | WhiteBIT | SUI-USDT | $0.9996 0.0004088 Eth | $20,710,911.00 10,634,372.702 SUI | 0.0002% |
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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