Overview
Max Total Supply
54,940,840,345.993792 USDT
Holders
6,285,712 ( -0.008%)
Market
Price
$1.00 @ 0.000416 ETH (-0.05%)
Onchain Market Cap
$54,911,117,351.37
Circulating Supply Market Cap
$120,390,527,513.00
Other Info
Token Contract (WITH 6 Decimals)
Balance
0 USDTValue
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | BTC-USDT | $0.9993 0.0004151 Eth | $2,053,575,174.00 30,143.746 BTC | 0.0000% |
2 | WEEX | BTC-USDT | $0.9993 0.0004149 Eth | $1,753,577,499.00 25,739.186 BTC | 0.0000% |
3 | Hotcoin | BTC-USDT | $0.9996 0.0004150 Eth | $1,676,030,048.00 24,669.396 BTC | 0.0000% |
4 | CoinW | BTC-USDT | $0.9991 0.0004149 Eth | $1,510,411,200.00 22,239.495 BTC | 0.0000% |
5 | Bybit | BTC-USDT | $0.9993 0.0004151 Eth | $1,462,993,664.00 21,449.070 BTC | 0.0000% |
6 | BVOX | BTC-USDT | $0.9996 0.0004150 Eth | $1,313,151,870.00 19,217.621 BTC | 0.0000% |
7 | Toobit | BTC-USDT | $0.9992 0.0004146 Eth | $1,149,764,048.00 16,869.591 BTC | 0.0000% |
8 | Ourbit | BTC-USDT | $0.9993 0.0004149 Eth | $1,087,167,288.00 15,956.021 BTC | 0.0000% |
9 | Pionex | BTC-USDT | $0.9993 0.0004149 Eth | $1,052,123,646.00 15,431.475 BTC | 0.0000% |
10 | MEXC | BTC-USDT | $0.9992 0.0004146 Eth | $1,034,399,393.00 15,221.904 BTC | 0.0000% |
11 | BitMart | BTC-USDT | $0.9993 0.0004149 Eth | $961,487,184.00 14,155.352 BTC | 0.0000% |
12 | OrangeX | BTC-USDT | $0.9993 0.0004149 Eth | $892,299,195.00 13,090.325 BTC | 0.0000% |
13 | Binance | ETH-USDT | $0.9993 0.0004150 Eth | $768,890,000.00 317,138.886 ETH | 0.0000% |
14 | DigiFinex | BTC-USDT | $0.9993 0.0004151 Eth | $703,922,270.00 10,362.276 BTC | 0.0000% |
15 | OKX | BTC-USDT | $0.9993 0.0004151 Eth | $565,037,434.00 8,296.740 BTC | 0.0000% |
16 | BitMart | ETH-USDT | $0.9992 0.0004149 Eth | $535,001,660.00 222,240.695 ETH | 0.0000% |
17 | Toobit | ETH-USDT | $0.9993 0.0004149 Eth | $515,500,996.00 212,582.734 ETH | 0.0000% |
18 | Bitunix | BTC-USDT | $0.9993 0.0004150 Eth | $512,176,408.00 7,534.645 BTC | 0.0000% |
19 | Binance | SOL-USDT | $0.9993 0.0004150 Eth | $499,613,764.00 3,109,043.699 SOL | 0.0000% |
20 | Hotcoin | ETH-USDT | $0.9992 0.0004152 Eth | $497,944,901.00 206,871.188 ETH | 0.0000% |
21 | Bybit | ETH-USDT | $0.9993 0.0004151 Eth | $473,144,873.00 194,638.890 ETH | 0.0000% |
22 | AscendEX (BitMax) | BTC-USDT | $0.9993 0.0004151 Eth | $468,772,432.00 6,899.971 BTC | 0.0000% |
23 | Binance | DOGE-USDT | $0.9993 0.0004150 Eth | $450,453,903.00 2,865,291,755.000 DOGE | 0.0279% |
24 | LBank | BTC-USDT | $0.9993 0.0004150 Eth | $445,642,985.00 6,563.485 BTC | 0.0000% |
25 | XT.COM | BTC-USDT | $0.9993 0.0004149 Eth | $420,007,569.00 6,164.206 BTC | 0.0000% |
26 | Coinbase Exchange | USDT-USD | $0.9992 0.0004150 Eth | $402,188,569.00 402,510,577.120 USDT | 0.0039% |
27 | MEXC | ETH-USDT | $0.9993 0.0004149 Eth | $324,836,969.00 134,842.261 ETH | 0.0000% |
28 | FameEX | ETH-USDT | $0.9993 0.0004149 Eth | $320,524,622.00 132,194.508 ETH | 0.0000% |
29 | HTX | BTC-USDT | $0.9993 0.0004151 Eth | $319,848,225.00 4,685.816 BTC | 0.0000% |
30 | WhiteBIT | ETH-USDT | $0.9992 0.0004149 Eth | $301,447,275.00 125,222.804 ETH | 0.0000% |
31 | P2B | ETH-USDT | $0.9991 0.0004149 Eth | $286,249,044.00 118,930.986 ETH | 0.0000% |
32 | DigiFinex | ETH-USDT | $0.9993 0.0004151 Eth | $269,382,410.00 111,956.521 ETH | 0.0000% |
33 | OrangeX | ETH-USDT | $0.9994 0.0004149 Eth | $265,678,688.00 109,291.478 ETH | 0.0000% |
34 | OKX | ETH-USDT | $0.9993 0.0004149 Eth | $262,050,719.00 108,326.035 ETH | 0.0000% |
35 | AscendEX (BitMax) | ETH-USDT | $0.9993 0.0004151 Eth | $252,445,003.00 104,919.003 ETH | 0.0000% |
36 | Tapbit | BTC-USDT | $0.9993 0.0004149 Eth | $249,243,228.00 3,659.211 BTC | 0.0000% |
37 | Bitget | BTC-USDT | $0.9993 0.0004150 Eth | $237,662,960.00 3,476.708 BTC | 0.0000% |
38 | CoinW | ETH-USDT | $0.9991 0.0004149 Eth | $232,436,755.00 96,552.571 ETH | 0.0000% |
39 | Biconomy.com | BTC-USDT | $0.9987 0.0004147 Eth | $216,294,808.00 3,172.515 BTC | 0.0000% |
40 | Gate.io | BTC-USDT | $0.9993 0.0004149 Eth | $214,289,851.00 3,151.329 BTC | 0.0000% |
41 | LATOKEN | BTC-USDT | $0.9992 0.0004149 Eth | $212,424,443.00 3,127.769 BTC | 0.0000% |
42 | BTSE | BTC-USDT | $0.9993 0.0004149 Eth | $193,647,135.00 2,852.657 BTC | 0.0000% |
43 | Gate.io | ETH-USDT | $0.9993 0.0004149 Eth | $175,481,557.00 72,685.627 ETH | 0.0000% |
44 | Binance | TROY-USDT | $0.9993 0.0004150 Eth | $173,652,883.00 46,622,992,452.000 TROY | 0.4533% |
45 | Bitunix | ETH-USDT | $0.9991 0.0004149 Eth | $172,654,870.00 71,761.895 ETH | 0.0000% |
46 | LBank | ETH-USDT | $0.9992 0.0004146 Eth | $163,574,838.00 67,883.581 ETH | 0.0000% |
47 | OKX | DOGE-USDT | $0.9993 0.0004149 Eth | $163,035,924.00 1,036,882,173.105 DOGE | 0.0101% |
48 | FameEX | USDC-USDT | $0.9994 0.0004149 Eth | $145,185,700.00 145,184,757.321 USDC | 0.0014% |
49 | Binance | SUI-USDT | $0.9993 0.0004150 Eth | $144,235,120.00 77,138,101.200 SUI | 0.0007% |
50 | Coinstore | BTC-USDT | $0.9993 0.0004149 Eth | $142,316,813.00 2,086.465 BTC | 0.0000% |
51 | Binance | BNB-USDT | $0.9993 0.0004150 Eth | $141,508,667.00 254,631.942 BNB | 0.0000% |
52 | KuCoin | BTC-USDT | $0.9993 0.0004149 Eth | $139,566,889.00 2,054.643 BTC | 0.0000% |
53 | Bitget | ETH-USDT | $0.9993 0.0004150 Eth | $129,381,252.00 53,146.391 ETH | 0.0000% |
54 | Bitget | DOGE-USDT | $0.9993 0.0004150 Eth | $128,190,230.00 818,491,336.722 DOGE | 0.0080% |
55 | FameEX | SOL-USDT | $0.9993 0.0004149 Eth | $127,354,847.00 792,535.457 SOL | 0.0000% |
56 | Binance | NEIRO-USDT | $0.9997 0.0004152 Eth | $126,062,951.00 97,210,041,316.000 NEIRO | 0.9451% |
57 | Bybit | SOL-USDT | $0.9993 0.0004151 Eth | $124,607,116.00 775,701.756 SOL | 0.0000% |
58 | KuCoin | ETH-USDT | $0.9993 0.0004149 Eth | $124,354,512.00 51,673.735 ETH | 0.0000% |
59 | Dex-Trade | BTC-USDT | $0.9993 0.0004149 Eth | $116,968,439.00 1,722.052 BTC | 0.0000% |
60 | Biconomy.com | ETH-USDT | $0.9992 0.0004149 Eth | $116,407,454.00 47,854.354 ETH | 0.0000% |
61 | Hotcoin | DOGE-USDT | $0.9993 0.0004149 Eth | $116,165,590.00 715,911,343.000 DOGE | 0.0070% |
62 | Gate.io | DOGE-USDT | $0.9993 0.0004149 Eth | $110,356,681.00 699,557,058.000 DOGE | 0.0068% |
63 | WhiteBIT | SOL-USDT | $0.9997 0.0004152 Eth | $107,362,617.00 676,578.248 SOL | 0.0000% |
64 | Binance | XRP-USDT | $0.9993 0.0004150 Eth | $105,215,484.00 207,728,749.000 XRP | 0.0020% |
65 | LATOKEN | ETH-USDT | $0.9993 0.0004150 Eth | $104,265,603.00 43,328.839 ETH | 0.0000% |
66 | Coinstore | ETH-USDT | $0.9992 0.0004149 Eth | $101,516,042.00 41,735.600 ETH | 0.0000% |
67 | WhiteBIT | DOGE-USDT | $0.9992 0.0004149 Eth | $100,454,345.00 619,577,633.000 DOGE | 0.0060% |
68 | Binance | RUNE-USDT | $0.9993 0.0004150 Eth | $97,837,191.00 21,261,226.700 RUNE | 0.0002% |
69 | LBank | SOL-USDT | $0.9993 0.0004151 Eth | $96,966,748.00 611,350.040 SOL | 0.0000% |
70 | OKX | SOL-USDT | $0.9993 0.0004149 Eth | $95,610,042.00 594,557.418 SOL | 0.0000% |
71 | Bybit | DOGE-USDT | $0.9993 0.0004151 Eth | $92,680,443.00 590,411,645.300 DOGE | 0.0057% |
72 | Deepcoin | SOL-USDT | $0.9993 0.0004149 Eth | $91,144,462.00 574,655.829 SOL | 0.0000% |
73 | BTSE | ETH-USDT | $0.9993 0.0004151 Eth | $75,269,507.00 31,210.270 ETH | 0.0000% |
74 | Bitget | SOL-USDT | $0.9993 0.0004150 Eth | $72,683,894.00 452,183.849 SOL | 0.0000% |
75 | Bybit | XRP-USDT | $0.9993 0.0004151 Eth | $69,905,674.00 138,117,064.890 XRP | 0.0013% |
76 | LBank | USDC-USDT | $0.9991 0.0004149 Eth | $69,235,525.00 69,252,943.660 USDC | 0.0007% |
77 | FameEX | DOGE-USDT | $0.9993 0.0004150 Eth | $68,624,056.00 436,714,221.742 DOGE | 0.0042% |
78 | HTX | ETH-USDT | $0.9993 0.0004151 Eth | $63,277,757.00 26,048.695 ETH | 0.0000% |
79 | Bybit | MNT-USDT | $0.9993 0.0004151 Eth | $63,039,405.00 113,208,996.880 MNT | 0.0011% |
80 | Bitunix | DOGE-USDT | $0.9991 0.0004149 Eth | $62,667,719.00 386,737,546.000 DOGE | 0.0038% |
81 | DigiFinex | GRASS-USDT | $0.9993 0.0004151 Eth | $62,608,474.00 41,174,789.226 GRASS | 0.0004% |
82 | HTX | DOGE-USDT | $0.9993 0.0004151 Eth | $58,502,188.00 374,528,369.526 DOGE | 0.0036% |
83 | Slex | BTC-USDT | $0.9991 0.0004149 Eth | $56,005,060.00 822.033 BTC | 0.0000% |
84 | Bitget | BGB-USDT | $0.9993 0.0004150 Eth | $55,176,059.00 49,536,344.339 BGB | 0.0005% |
85 | DigiFinex | DOGE-USDT | $0.9993 0.0004151 Eth | $54,421,678.00 335,174,358.850 DOGE | 0.0033% |
86 | Bitunix | SOL-USDT | $0.9991 0.0004149 Eth | $52,033,687.00 328,339.990 SOL | 0.0000% |
87 | Deepcoin | UXLINK-USDT | $0.9993 0.0004151 Eth | $51,446,737.00 97,420,014.602 UXLINK | 0.0009% |
88 | Coinbase Exchange | BTC-USDT | $0.9993 0.0004151 Eth | $50,303,259.00 740.551 BTC | 0.0000% |
89 | Gate.io | SUI-USDT | $0.9993 0.0004151 Eth | $44,098,473.00 23,610,382.190 SUI | 0.0002% |
90 | DigiFinex | USDC-USDT | $0.9993 0.0004151 Eth | $43,012,649.00 43,012,141.000 USDC | 0.0004% |
91 | OKX | USDC-USDT | $0.9993 0.0004149 Eth | $42,961,660.00 42,962,917.242 USDC | 0.0004% |
92 | Gate.io | PEPE-USDT | $0.9993 0.0004151 Eth | $42,229,192.00 5,229,824,591,964.000 PEPE | 50.8448% |
93 | CoinEx | BTC-USDT | $0.9992 0.0004145 Eth | $41,906,765.00 615.102 BTC | 0.0000% |
94 | BingX | BTC-USDT | $0.9993 0.0004151 Eth | $39,980,152.00 585.397 BTC | 0.0000% |
95 | Bitget | PEPE-USDT | $0.9993 0.0004151 Eth | $39,790,909.00 4,901,813,841,556.000 PEPE | 47.6559% |
96 | DigiFinex | SOL-USDT | $0.9993 0.0004151 Eth | $38,400,162.00 242,133.360 SOL | 0.0000% |
97 | HashKey Global | BTC-USDT | $0.9994 0.0004149 Eth | $37,830,024.00 553.105 BTC | 0.0000% |
98 | OKX | SUI-USDT | $0.9993 0.0004149 Eth | $36,107,148.00 19,289,390.243 SUI | 0.0002% |
99 | WhiteBIT | LINK-USDT | $0.9992 0.0004149 Eth | $32,487,132.00 3,144,802.440 LINK | 0.0000% |
100 | BingX | ETH-USDT | $0.9993 0.0004151 Eth | $24,481,391.00 10,065.237 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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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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