Feature Tip: Add private address tag to any address under My Name Tag !
Overview
Max Total Supply
76,926,220,145.483487 USDT
Holders
6,573,390 ( -0.067%)
Market
Price
$1.00 @ 0.000285 ETH (+0.31%)
Onchain Market Cap
$77,080,072,585.77
Circulating Supply Market Cap
$139,977,018,390.00
Other Info
Token Contract (WITH 6 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | BTC-USDT | $0.9995 0.0002846 Eth | $5,345,710,067.00 55,916.326 BTC | 0.0002% |
2 | BVOX | BTC-USDT | $0.9994 0.0002846 Eth | $3,999,359,079.00 41,828.175 BTC | 0.0001% |
3 | FameEX | BTC-USDT | $0.9994 0.0002849 Eth | $3,991,042,761.00 41,754.482 BTC | 0.0001% |
4 | Ourbit | BTC-USDT | $0.9996 0.0002850 Eth | $3,206,469,785.00 33,536.813 BTC | 0.0001% |
5 | Bybit | BTC-USDT | $0.9994 0.0002846 Eth | $3,092,816,625.00 32,207.494 BTC | 0.0001% |
6 | Toobit | BTC-USDT | $0.9994 0.0002848 Eth | $2,733,646,231.00 28,557.161 BTC | 0.0001% |
7 | Tapbit | ETH-USDT | $0.9995 0.0002848 Eth | $2,605,700,423.00 784,666.028 ETH | 0.0024% |
8 | Toobit | ETH-USDT | $0.9994 0.0002849 Eth | $2,554,013,575.00 770,650.730 ETH | 0.0024% |
9 | WhiteBIT | BTC-USDT | $0.9997 0.0002847 Eth | $2,251,004,813.00 22,909.607 BTC | 0.0001% |
10 | Binance | DOGE-USDT | $0.9998 0.0002866 Eth | $2,037,119,930.00 6,835,946,493.000 DOGE | 21.0546% |
11 | Pionex | ETH-USDT | $0.9997 0.0002847 Eth | $1,937,207,926.00 580,325.165 ETH | 0.0018% |
12 | OKX | BTC-USDT | $0.9995 0.0002846 Eth | $1,903,958,143.00 19,908.879 BTC | 0.0001% |
13 | Bitget | BTC-USDT | $0.9994 0.0002846 Eth | $1,870,456,420.00 19,568.585 BTC | 0.0001% |
14 | Binance | SOL-USDT | $0.9995 0.0002868 Eth | $1,749,322,075.00 9,390,635.025 SOL | 0.0289% |
15 | Bitget | ETH-USDT | $0.9994 0.0002846 Eth | $1,747,552,095.00 529,217.517 ETH | 0.0016% |
16 | MEXC | BTC-USDT | $0.9994 0.0002846 Eth | $1,702,715,827.00 17,311.375 BTC | 0.0001% |
17 | OKX | ETH-USDT | $0.9994 0.0002846 Eth | $1,672,943,780.00 507,592.616 ETH | 0.0016% |
18 | Bybit | ETH-USDT | $0.9994 0.0002846 Eth | $1,539,684,629.00 465,917.101 ETH | 0.0014% |
19 | DigiFinex | BTC-USDT | $0.9995 0.0002846 Eth | $1,405,888,620.00 14,307.291 BTC | 0.0000% |
20 | Gate.io | ETH-USDT | $0.9994 0.0002846 Eth | $1,330,656,595.00 404,370.429 ETH | 0.0012% |
21 | Gate.io | BTC-USDT | $0.9994 0.0002846 Eth | $1,161,338,095.00 12,181.528 BTC | 0.0000% |
22 | Bitunix | BTC-USDT | $0.9997 0.0002849 Eth | $1,086,699,613.00 11,065.629 BTC | 0.0000% |
23 | Hotcoin | BTC-USDT | $0.9995 0.0002848 Eth | $1,074,210,164.00 10,932.957 BTC | 0.0000% |
24 | OKX | DOGE-USDT | $0.9994 0.0002846 Eth | $1,044,423,383.00 3,506,386,928.037 DOGE | 10.7996% |
25 | LBank | BTC-USDT | $0.9995 0.0002848 Eth | $1,025,976,019.00 10,445.397 BTC | 0.0000% |
26 | XT.COM | BTC-USDT | $0.9994 0.0002846 Eth | $997,082,038.00 10,429.568 BTC | 0.0000% |
27 | Coinbase Exchange | USDT-USD | $0.9993 0.0002846 Eth | $980,956,905.00 981,634,233.110 USDT | 3.0234% |
28 | AscendEX (BitMax) | BTC-USDT | $0.9994 0.0002846 Eth | $957,395,379.00 9,739.013 BTC | 0.0000% |
29 | WhiteBIT | ETH-USDT | $0.9994 0.0002849 Eth | $885,929,281.00 252,080.561 ETH | 0.0008% |
30 | Binance | FDUSD-USDT | $0.9995 0.0002873 Eth | $844,472,483.00 846,507,536.000 FDUSD | 2.6072% |
31 | P2B | BTC-USDT | $0.9995 0.0002848 Eth | $830,346,925.00 8,453.541 BTC | 0.0000% |
32 | Binance | SUI-USDT | $0.9995 0.0002862 Eth | $798,033,839.00 194,430,334.600 SUI | 0.5988% |
33 | HTX | BTC-USDT | $0.9994 0.0002846 Eth | $763,337,407.00 7,952.483 BTC | 0.0000% |
34 | MEXC | DOGE-USDT | $0.9994 0.0002846 Eth | $748,054,668.00 2,214,241,932.970 DOGE | 6.8198% |
35 | Bitunix | ETH-USDT | $0.9997 0.0002847 Eth | $732,628,743.00 208,486.858 ETH | 0.0006% |
36 | LATOKEN | BTC-USDT | $0.9996 0.0002850 Eth | $651,133,708.00 6,628.510 BTC | 0.0000% |
37 | DigiFinex | ETH-USDT | $0.9995 0.0002846 Eth | $639,160,449.00 181,828.341 ETH | 0.0006% |
38 | Bybit | XRP-USDT | $0.9994 0.0002846 Eth | $585,962,779.00 270,718,021.090 XRP | 0.8338% |
39 | Tapbit | BTC-USDT | $0.9997 0.0002847 Eth | $583,652,332.00 6,100.056 BTC | 0.0000% |
40 | LATOKEN | ETH-USDT | $0.9994 0.0002848 Eth | $574,425,989.00 163,499.496 ETH | 0.0005% |
41 | Bitget | DOGE-USDT | $0.9994 0.0002846 Eth | $569,900,922.00 1,923,566,889.376 DOGE | 5.9245% |
42 | Bitget | XRP-USDT | $0.9994 0.0002846 Eth | $566,810,342.00 262,754,138.550 XRP | 0.8093% |
43 | Bybit | SOL-USDT | $0.9994 0.0002846 Eth | $553,015,970.00 2,986,339.759 SOL | 0.0092% |
44 | AscendEX (BitMax) | ETH-USDT | $0.9994 0.0002846 Eth | $535,624,710.00 152,273.455 ETH | 0.0005% |
45 | FameEX | SOL-USDT | $1.00 0.0002851 Eth | $535,328,750.00 2,871,273.512 SOL | 0.0088% |
46 | Binance | ADA-USDT | $0.9997 0.0002873 Eth | $493,049,873.00 578,113,132.000 ADA | 1.7806% |
47 | WhiteBIT | SOL-USDT | $0.9994 0.0002849 Eth | $480,974,675.00 2,427,734.681 SOL | 0.0075% |
48 | Azbit | BTC-USDT | $0.9995 0.0002847 Eth | $459,026,970.00 4,813.742 BTC | 0.0000% |
49 | Gate.io | DOGE-USDT | $0.9994 0.0002846 Eth | $451,096,844.00 1,514,582,698.900 DOGE | 4.6649% |
50 | Binance | ENA-USDT | $0.9994 0.0002848 Eth | $410,362,976.00 401,219,300.800 ENA | 1.2357% |
51 | FameEX | DOGE-USDT | $0.9994 0.0002849 Eth | $409,552,462.00 1,373,954,738.626 DOGE | 4.2318% |
52 | Bitget | BGB-USDT | $0.9994 0.0002846 Eth | $409,209,963.00 102,078,359.554 BGB | 0.3144% |
53 | Gate.io | XRP-USDT | $0.9994 0.0002846 Eth | $396,512,342.00 183,182,409.866 XRP | 0.5642% |
54 | KuCoin | BTC-USDT | $0.9994 0.0002846 Eth | $392,721,576.00 3,995.066 BTC | 0.0000% |
55 | Bybit | DOGE-USDT | $0.9994 0.0002846 Eth | $389,078,800.00 1,317,083,369.400 DOGE | 4.0566% |
56 | WhiteBIT | DOGE-USDT | $0.9994 0.0002846 Eth | $388,390,521.00 1,149,268,833.600 DOGE | 3.5397% |
57 | DigiFinex | DOGE-USDT | $0.9995 0.0002846 Eth | $381,985,195.00 1,132,414,063.450 DOGE | 3.4878% |
58 | KuCoin | ETH-USDT | $0.9994 0.0002846 Eth | $374,026,347.00 106,402.886 ETH | 0.0003% |
59 | BTSE | BTC-USDT | $0.9994 0.0002848 Eth | $362,408,973.00 3,689.257 BTC | 0.0000% |
60 | Binance | HBAR-USDT | $0.9997 0.0002873 Eth | $354,150,638.00 1,360,642,278.000 HBAR | 4.1908% |
61 | OKX | SOL-USDT | $0.9994 0.0002846 Eth | $346,056,946.00 1,863,974.125 SOL | 0.0057% |
62 | MEXC | SOL-USDT | $0.9994 0.0002846 Eth | $338,018,351.00 1,703,459.810 SOL | 0.0052% |
63 | OKX | XRP-USDT | $0.9994 0.0002846 Eth | $323,281,201.00 149,602,577.026 XRP | 0.4608% |
64 | Deepcoin | SOL-USDT | $0.9994 0.0002849 Eth | $309,866,203.00 1,667,170.567 SOL | 0.0051% |
65 | WhiteBIT | ZEN-USDT | $0.9994 0.0002846 Eth | $283,650,473.00 10,207,092.479 ZEN | 0.0314% |
66 | Kraken | USDT-USD | $0.9993 0.0002846 Eth | $283,085,988.00 283,272,947.863 USDT | 0.8725% |
67 | HTX | ETH-USDT | $0.9994 0.0002846 Eth | $268,854,173.00 80,580.475 ETH | 0.0002% |
68 | Coinbase Exchange | USDT-USDC | $0.9995 0.0002848 Eth | $240,222,135.00 240,338,538.280 USDT | 0.7402% |
69 | Bitunix | DOGE-USDT | $0.9997 0.0002847 Eth | $236,714,446.00 702,623,818.000 DOGE | 2.1641% |
70 | KuCoin | XRP-USDT | $0.9994 0.0002846 Eth | $234,043,118.00 99,942,507.762 XRP | 0.3078% |
71 | Binance | UNI-USDT | $0.9997 0.0002847 Eth | $233,801,894.00 18,722,928.830 UNI | 0.0577% |
72 | Bitget | SUI-USDT | $0.9994 0.0002846 Eth | $232,467,834.00 56,509,052.970 SUI | 0.1740% |
73 | Binance | PNUT-USDT | $0.9995 0.0002846 Eth | $216,163,251.00 337,668,945.300 PNUT | 1.0400% |
74 | Toobit | XRP-USDT | $0.9994 0.0002849 Eth | $215,972,327.00 99,591,339.000 XRP | 0.3067% |
75 | Bybit | MNT-USDT | $0.9994 0.0002846 Eth | $215,958,201.00 185,574,181.580 MNT | 0.5716% |
76 | Hibt | BTC-USDT | $0.9996 0.0002850 Eth | $214,262,940.00 2,240.972 BTC | 0.0000% |
77 | Azbit | XRP-USDT | $0.9994 0.0002846 Eth | $212,577,888.00 98,502,783.360 XRP | 0.3034% |
78 | OKX | SUI-USDT | $0.9994 0.0002846 Eth | $210,716,242.00 51,161,357.709 SUI | 0.1576% |
79 | Bitget | SOL-USDT | $0.9994 0.0002846 Eth | $200,901,237.00 1,079,250.729 SOL | 0.0033% |
80 | Gate.io | SOL-USDT | $0.9994 0.0002846 Eth | $198,316,148.00 1,072,465.732 SOL | 0.0033% |
81 | Bitunix | XRP-USDT | $0.9995 0.0002846 Eth | $192,578,333.00 82,246,239.000 XRP | 0.2533% |
82 | HTX | DOGE-USDT | $0.9994 0.0002846 Eth | $192,564,174.00 627,521,092.865 DOGE | 1.9328% |
83 | Binance | NEAR-USDT | $0.9995 0.0002846 Eth | $191,419,737.00 38,628,838.500 NEAR | 0.1190% |
84 | Azbit | DOGE-USDT | $0.9995 0.0002847 Eth | $186,755,205.00 628,943,595.720 DOGE | 1.9371% |
85 | BYDFi | BTC-USDT | $1.00 0.0002851 Eth | $179,582,822.00 1,827.640 BTC | 0.0000% |
86 | DigiFinex | TRX-USDT | $0.9995 0.0002846 Eth | $167,537,422.00 666,387,858.400 TRX | 2.0525% |
87 | BTSE | ETH-USDT | $0.9994 0.0002848 Eth | $165,047,061.00 46,976.709 ETH | 0.0001% |
88 | KuCoin | SOL-USDT | $0.9995 0.0002846 Eth | $159,478,154.00 803,434.706 SOL | 0.0025% |
89 | LBank | DOGE-USDT | $0.9995 0.0002848 Eth | $154,638,234.00 459,016,427.000 DOGE | 1.4138% |
90 | Azbit | SOL-USDT | $0.9995 0.0002847 Eth | $153,910,660.00 826,744.477 SOL | 0.0025% |
91 | Binance | VANA-USDT | $0.9994 0.0002848 Eth | $150,704,494.00 8,281,426.660 VANA | 0.0255% |
92 | Deepcoin | DOGE-USDT | $0.9994 0.0002848 Eth | $149,063,213.00 494,406,142.011 DOGE | 1.5228% |
93 | Bitunix | SOL-USDT | $0.9997 0.0002847 Eth | $147,812,573.00 746,930.234 SOL | 0.0023% |
94 | Binance | ARB-USDT | $0.9996 0.0002871 Eth | $146,428,517.00 197,616,731.400 ARB | 0.6087% |
95 | WhiteBIT | HBAR-USDT | $0.9994 0.0002846 Eth | $144,866,873.00 522,905,808.730 HBAR | 1.6105% |
96 | DigiFinex | SOL-USDT | $0.9995 0.0002846 Eth | $143,960,836.00 725,443.050 SOL | 0.0022% |
97 | DigiFinex | SUI-USDT | $0.9994 0.0002846 Eth | $143,255,948.00 29,906,724.300 SUI | 0.0921% |
98 | Ourbit | XRP-USDT | $0.9996 0.0002850 Eth | $142,219,190.00 64,977,491.270 XRP | 0.2001% |
99 | MEXC | ADA-USDT | $0.9995 0.0002873 Eth | $124,710,866.00 130,584,322.310 ADA | 0.4022% |
100 | BingX | ETH-USDT | $0.9994 0.0002846 Eth | $92,345,532.00 27,688.792 ETH | 0.0001% |
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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