Overview
Max Total Supply
69,929,452,093.657795 USDT
Holders
6,408,945 ( 0.039%)
Market
Price
$1.00 @ 0.000287 ETH (-0.05%)
Onchain Market Cap
$69,929,452,093.66
Circulating Supply Market Cap
$132,667,336,718.00
Other Info
Token Contract (WITH 6 Decimals)
Balance
5.01 USDTValue
$5.01 ( ~0.00143665743973813 Eth) [0.0000%]Loading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | BTC-USDT | $1.00 0.0002870 Eth | $3,149,897,097.00 32,333.503 BTC | 0.0000% |
2 | FameEX | BTC-USDT | $1.001 0.0002873 Eth | $2,894,128,890.00 29,691.067 BTC | 0.0000% |
3 | Bybit | BTC-USDT | $1.00 0.0002870 Eth | $2,838,507,197.00 29,113.140 BTC | 0.0000% |
4 | BVOX | BTC-USDT | $1.001 0.0002891 Eth | $2,392,131,259.00 24,538.058 BTC | 0.0000% |
5 | Ourbit | BTC-USDT | $1.001 0.0002876 Eth | $1,893,112,071.00 19,425.346 BTC | 0.0000% |
6 | Binance | ETH-USDT | $1.00 0.0002870 Eth | $1,835,291,913.00 540,106.821 ETH | 0.0000% |
7 | Toobit | BTC-USDT | $1.001 0.0002874 Eth | $1,705,741,168.00 17,500.599 BTC | 0.0000% |
8 | WEEX | BTC-USDT | $1.001 0.0002873 Eth | $1,619,378,163.00 16,623.084 BTC | 0.0000% |
9 | Binance | DOGE-USDT | $1.00 0.0002870 Eth | $1,464,818,619.00 3,477,462,127.000 DOGE | 0.0136% |
10 | Pionex | ETH-USDT | $1.001 0.0002885 Eth | $1,346,026,161.00 397,144.845 ETH | 0.0000% |
11 | Hotcoin | BTC-USDT | $1.001 0.0002870 Eth | $1,343,086,012.00 13,751.790 BTC | 0.0000% |
12 | Tapbit | ETH-USDT | $1.001 0.0002884 Eth | $1,322,234,763.00 389,069.371 ETH | 0.0000% |
13 | DigiFinex | BTC-USDT | $1.00 0.0002870 Eth | $1,242,339,323.00 12,716.746 BTC | 0.0000% |
14 | FameEX | ETH-USDT | $1.001 0.0002893 Eth | $1,237,159,856.00 364,360.441 ETH | 0.0000% |
15 | Binance | XRP-USDT | $1.001 0.0002873 Eth | $1,228,594,275.00 865,756,235.000 XRP | 0.0034% |
16 | Toobit | ETH-USDT | $1.001 0.0002892 Eth | $1,207,992,969.00 355,748.884 ETH | 0.0000% |
17 | WEEX | ETH-USDT | $1.001 0.0002876 Eth | $1,141,453,734.00 337,112.431 ETH | 0.0000% |
18 | P2B | BTC-USDT | $1.00 0.0002873 Eth | $960,221,102.00 9,826.422 BTC | 0.0000% |
19 | AscendEX (BitMax) | BTC-USDT | $1.00 0.0002870 Eth | $940,514,080.00 9,624.972 BTC | 0.0000% |
20 | Binance | XLM-USDT | $1.00 0.0002870 Eth | $939,091,895.00 1,811,725,231.000 XLM | 0.0071% |
21 | Bitunix | BTC-USDT | $1.001 0.0002873 Eth | $856,061,151.00 8,759.031 BTC | 0.0000% |
22 | BVOX | ETH-USDT | $1.001 0.0002873 Eth | $832,294,389.00 245,004.297 ETH | 0.0000% |
23 | Deepcoin | BTC-USDT | $1.001 0.0002873 Eth | $822,000,102.00 8,410.304 BTC | 0.0000% |
24 | Binance | SOL-USDT | $1.001 0.0002883 Eth | $772,216,121.00 3,081,406.133 SOL | 0.0000% |
25 | CoinW | ETH-USDT | $1.001 0.0002887 Eth | $769,649,060.00 221,776.595 ETH | 0.0000% |
26 | OKX | BTC-USDT | $1.00 0.0002870 Eth | $742,891,717.00 7,618.643 BTC | 0.0000% |
27 | DigiFinex | ETH-USDT | $1.00 0.0002870 Eth | $689,354,564.00 197,781.891 ETH | 0.0000% |
28 | Binance | FDUSD-USDT | $1.001 0.0002884 Eth | $671,638,491.00 673,075,939.000 FDUSD | 0.0026% |
29 | Bybit | ETH-USDT | $1.00 0.0002870 Eth | $671,528,404.00 197,728.736 ETH | 0.0000% |
30 | Binance | SAND-USDT | $1.00 0.0002870 Eth | $659,052,011.00 923,190,518.000 SAND | 0.0036% |
31 | LBank | BTC-USDT | $1.001 0.0002874 Eth | $654,474,969.00 6,697.257 BTC | 0.0000% |
32 | OKX | ETH-USDT | $1.00 0.0002870 Eth | $574,082,860.00 168,493.067 ETH | 0.0000% |
33 | MEXC | ETH-USDT | $1.00 0.0002870 Eth | $563,252,889.00 161,458.419 ETH | 0.0000% |
34 | Binance | PNUT-USDT | $1.00 0.0002870 Eth | $557,224,382.00 447,055,755.800 PNUT | 0.0018% |
35 | WhiteBIT | ETH-USDT | $1.00 0.0002870 Eth | $547,072,623.00 156,637.411 ETH | 0.0000% |
36 | OKX | DOGE-USDT | $1.00 0.0002870 Eth | $546,739,868.00 1,298,810,632.506 DOGE | 0.0051% |
37 | Hotcoin | ETH-USDT | $1.00 0.0002873 Eth | $524,705,255.00 150,560.000 ETH | 0.0000% |
38 | Binance | ADA-USDT | $1.00 0.0002870 Eth | $514,046,657.00 507,703,635.700 ADA | 0.0020% |
39 | XT.COM | ETH-USDT | $1.00 0.0002879 Eth | $508,223,613.00 149,643.570 ETH | 0.0000% |
40 | Binance | PEPE-USDT | $1.00 0.0002870 Eth | $508,018,692.00 25,481,086,794,191.000 PEPE | 99.7917% |
41 | Ourbit | ETH-USDT | $1.001 0.0002872 Eth | $495,882,204.00 146,028.490 ETH | 0.0000% |
42 | Coinbase Exchange | USDT-USD | $1.001 0.0002871 Eth | $489,616,597.00 489,327,893.160 USDT | 0.0019% |
43 | Bitunix | ETH-USDT | $1.001 0.0002873 Eth | $463,265,529.00 132,683.564 ETH | 0.0000% |
44 | Binance | BNB-USDT | $1.001 0.0002886 Eth | $436,349,181.00 662,618.935 BNB | 0.0000% |
45 | HTX | BTC-USDT | $1.00 0.0002870 Eth | $413,835,102.00 4,244.109 BTC | 0.0000% |
46 | Bitget | XRP-USDT | $1.001 0.0002870 Eth | $403,288,878.00 283,905,950.787 XRP | 0.0011% |
47 | Tapbit | BTC-USDT | $1.001 0.0002872 Eth | $386,125,936.00 3,962.646 BTC | 0.0000% |
48 | OrangeX | ETH-USDT | $1.00 0.0002870 Eth | $374,948,555.00 110,577.040 ETH | 0.0000% |
49 | Binance | SEI-USDT | $1.00 0.0002870 Eth | $372,859,767.00 597,090,335.400 SEI | 0.0023% |
50 | MEXC | BTC-USDT | $1.001 0.0002873 Eth | $358,071,400.00 3,664.240 BTC | 0.0000% |
51 | LBank | ETH-USDT | $1.00 0.0002879 Eth | $342,030,310.00 98,215.699 ETH | 0.0000% |
52 | Binance | AVAX-USDT | $1.002 0.0002877 Eth | $339,601,828.00 7,864,608.160 AVAX | 0.0000% |
53 | Bybit | XRP-USDT | $1.00 0.0002870 Eth | $337,107,241.00 238,482,279.250 XRP | 0.0009% |
54 | Hotcoin | DOGE-USDT | $1.001 0.0002882 Eth | $313,062,376.00 749,111,004.661 DOGE | 0.0029% |
55 | Bitget | DOGE-USDT | $1.001 0.0002870 Eth | $299,140,841.00 710,132,148.774 DOGE | 0.0028% |
56 | LATOKEN | ETH-USDT | $1.00 0.0002870 Eth | $296,607,953.00 85,099.498 ETH | 0.0000% |
57 | Biconomy.com | BTC-USDT | $1.00 0.0002873 Eth | $296,094,387.00 3,038.730 BTC | 0.0000% |
58 | MEXC | DOGE-USDT | $1.001 0.0002876 Eth | $295,783,561.00 706,942,075.280 DOGE | 0.0028% |
59 | FameEX | DOGE-USDT | $1.001 0.0002886 Eth | $295,511,180.00 701,484,836.365 DOGE | 0.0027% |
60 | Gate.io | ETH-USDT | $1.00 0.0002870 Eth | $271,976,838.00 80,279.282 ETH | 0.0000% |
61 | Binance | DOT-USDT | $1.00 0.0002870 Eth | $264,634,452.00 30,108,026.560 DOT | 0.0001% |
62 | Binance | WIF-USDT | $1.002 0.0002877 Eth | $260,980,893.00 78,711,525.410 WIF | 0.0003% |
63 | Bitget | BTC-USDT | $1.001 0.0002870 Eth | $259,909,185.00 2,667.852 BTC | 0.0000% |
64 | Binance | FTM-USDT | $1.001 0.0002886 Eth | $253,095,089.00 264,454,565.000 FTM | 0.0010% |
65 | Binance | TIA-USDT | $1.00 0.0002870 Eth | $240,795,579.00 30,625,441.420 TIA | 0.0001% |
66 | Gate.io | XRP-USDT | $1.00 0.0002870 Eth | $235,199,039.00 166,005,709.720 XRP | 0.0007% |
67 | OKX | XRP-USDT | $1.00 0.0002870 Eth | $232,259,972.00 162,922,389.088 XRP | 0.0006% |
68 | WEEX | DOGE-USDT | $1.001 0.0002872 Eth | $231,049,940.00 552,103,732.380 DOGE | 0.0022% |
69 | Binance | NEAR-USDT | $1.00 0.0002870 Eth | $230,413,390.00 34,058,974.200 NEAR | 0.0001% |
70 | KuCoin | BTC-USDT | $1.001 0.0002870 Eth | $227,999,193.00 2,334.894 BTC | 0.0000% |
71 | Binance | NOT-USDT | $1.00 0.0002870 Eth | $217,652,946.00 23,649,940,223.000 NOT | 0.0926% |
72 | Bitunix | DOGE-USDT | $1.001 0.0002873 Eth | $216,468,499.00 517,468,065.000 DOGE | 0.0020% |
73 | Gate.io | DOGE-USDT | $1.00 0.0002870 Eth | $206,680,119.00 491,228,447.541 DOGE | 0.0019% |
74 | WhiteBIT | NEAR-USDT | $1.001 0.0002886 Eth | $205,970,140.00 30,656,107.550 NEAR | 0.0001% |
75 | Bitget | XLM-USDT | $1.00 0.0002870 Eth | $205,402,935.00 397,372,991.430 XLM | 0.0016% |
76 | Biconomy.com | ETH-USDT | $1.001 0.0002882 Eth | $204,957,970.00 60,503.094 ETH | 0.0000% |
77 | Kraken | USDT-USD | $1.001 0.0002871 Eth | $200,589,864.00 200,459,565.588 USDT | 0.0008% |
78 | HTX | DOGE-USDT | $1.00 0.0002870 Eth | $200,240,390.00 474,591,079.884 DOGE | 0.0019% |
79 | Bybit | DOGE-USDT | $1.00 0.0002870 Eth | $200,170,537.00 475,264,070.400 DOGE | 0.0019% |
80 | Bybit | SOL-USDT | $1.00 0.0002870 Eth | $184,635,736.00 736,861.127 SOL | 0.0000% |
81 | Binance | ARB-USDT | $1.001 0.0002879 Eth | $175,938,783.00 202,870,113.600 ARB | 0.0008% |
82 | DigiFinex | DOGE-USDT | $1.00 0.0002870 Eth | $174,802,610.00 418,093,132.710 DOGE | 0.0016% |
83 | KuCoin | ETH-USDT | $1.001 0.0002870 Eth | $172,858,423.00 49,560.708 ETH | 0.0000% |
84 | Bitget | ETH-USDT | $1.001 0.0002870 Eth | $172,142,539.00 50,833.289 ETH | 0.0000% |
85 | Deepcoin | DOGE-USDT | $1.001 0.0002886 Eth | $171,994,579.00 425,054,911.258 DOGE | 0.0017% |
86 | HTX | ETH-USDT | $1.00 0.0002870 Eth | $170,965,334.00 50,451.058 ETH | 0.0000% |
87 | Bitunix | XRP-USDT | $1.001 0.0002873 Eth | $170,868,461.00 118,562,626.000 XRP | 0.0005% |
88 | OKX | SOL-USDT | $1.00 0.0002870 Eth | $163,052,107.00 650,425.461 SOL | 0.0000% |
89 | Gate.io | BTC-USDT | $1.00 0.0002870 Eth | $162,501,048.00 1,668.892 BTC | 0.0000% |
90 | WEEX | SOL-USDT | $1.001 0.0002873 Eth | $154,714,996.00 618,469.690 SOL | 0.0000% |
91 | Deepcoin | SOL-USDT | $1.00 0.0002870 Eth | $148,620,721.00 604,288.192 SOL | 0.0000% |
92 | BTSE | ETH-USDT | $1.001 0.0002870 Eth | $143,151,199.00 40,980.522 ETH | 0.0000% |
93 | Deepcoin | XRP-USDT | $1.001 0.0002887 Eth | $138,324,449.00 99,017,113.135 XRP | 0.0004% |
94 | OrangeX | DOGE-USDT | $1.00 0.0002870 Eth | $137,367,033.00 326,959,242.000 DOGE | 0.0013% |
95 | WhiteBIT | LINK-USDT | $1.001 0.0002873 Eth | $119,922,824.00 6,469,839.990 LINK | 0.0000% |
96 | Bybit | MNT-USDT | $1.001 0.0002870 Eth | $111,426,360.00 132,314,906.370 MNT | 0.0005% |
97 | Fastex | BTC-USDT | $1.001 0.0002885 Eth | $108,343,653.00 1,109.191 BTC | 0.0000% |
98 | Binance | LTC-USDT | $1.001 0.0002882 Eth | $103,701,233.00 1,077,933.174 LTC | 0.0000% |
99 | Binance | BOME-USDT | $1.00 0.0002870 Eth | $86,800,927.00 9,397,450,706.000 BOME | 0.0368% |
100 | BingX | BTC-USDT | $1.00 0.0002870 Eth | $62,819,647.00 644.285 BTC | 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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