Overview
Max Total Supply
69,929,452,093.657795 USDT
Holders
6,417,707 ( 0.017%)
Market
Price
$1.00 @ 0.000300 ETH (-0.17%)
Onchain Market Cap
$69,890,081,812.13
Circulating Supply Market Cap
$132,971,956,343.00
Other Info
Token Contract (WITH 6 Decimals)
Balance
112.458 USDTValue
$112.39 ( ~0.0337155905009624 Eth) [0.0000%]Loading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | BTC-USDT | $0.9999 0.0003002 Eth | $5,826,043,259.00 61,685.743 BTC | 0.0000% |
2 | BVOX | BTC-USDT | $0.9999 0.0003009 Eth | $4,362,255,163.00 46,186.555 BTC | 0.0000% |
3 | Ourbit | BTC-USDT | $0.9998 0.0003007 Eth | $3,427,840,064.00 36,302.588 BTC | 0.0000% |
4 | CoinW | BTC-USDT | $0.9998 0.0003007 Eth | $3,384,382,406.00 36,634.779 BTC | 0.0000% |
5 | Binance | ETH-USDT | $1.00 0.0003010 Eth | $3,375,819,612.00 983,385.328 ETH | 0.0000% |
6 | Toobit | BTC-USDT | $0.9998 0.0003007 Eth | $2,903,341,251.00 30,732.323 BTC | 0.0000% |
7 | DigiFinex | BTC-USDT | $0.9999 0.0003002 Eth | $2,283,436,968.00 24,702.412 BTC | 0.0000% |
8 | OrangeX | BTC-USDT | $1.00 0.0003010 Eth | $2,254,004,386.00 23,858.013 BTC | 0.0000% |
9 | Tapbit | ETH-USDT | $0.9998 0.0003007 Eth | $2,239,362,629.00 652,925.849 ETH | 0.0000% |
10 | Toobit | ETH-USDT | $0.9998 0.0003007 Eth | $2,182,548,060.00 635,922.420 ETH | 0.0000% |
11 | Pionex | ETH-USDT | $0.9997 0.0003007 Eth | $2,048,659,798.00 596,794.643 ETH | 0.0000% |
12 | BitMart | BTC-USDT | $1.00 0.0003010 Eth | $1,944,620,501.00 21,057.594 BTC | 0.0000% |
13 | Binance | DOGE-USDT | $1.00 0.0003010 Eth | $1,896,125,726.00 4,751,626,394.000 DOGE | 0.0310% |
14 | WEEX | ETH-USDT | $0.9997 0.0003016 Eth | $1,802,113,440.00 543,250.793 ETH | 0.0000% |
15 | Bitunix | BTC-USDT | $1.00 0.0003010 Eth | $1,617,644,669.00 17,504.634 BTC | 0.0000% |
16 | OKX | BTC-USDT | $0.9999 0.0003002 Eth | $1,529,469,864.00 16,180.455 BTC | 0.0000% |
17 | Binance | SOL-USDT | $0.9999 0.0003007 Eth | $1,430,353,323.00 6,029,123.808 SOL | 0.0000% |
18 | BitMart | ETH-USDT | $1.00 0.0003010 Eth | $1,429,171,267.00 429,833.738 ETH | 0.0000% |
19 | Deepcoin | BTC-USDT | $0.9999 0.0003009 Eth | $1,417,940,197.00 14,349.665 BTC | 0.0000% |
20 | Binance | XRP-USDT | $0.9999 0.0003007 Eth | $1,353,212,531.00 956,216,853.000 XRP | 0.0062% |
21 | MEXC | ETH-USDT | $1.00 0.0003010 Eth | $1,343,342,510.00 404,089.383 ETH | 0.0000% |
22 | P2B | BTC-USDT | $0.9999 0.0003008 Eth | $1,298,649,278.00 14,051.677 BTC | 0.0000% |
23 | CoinW | ETH-USDT | $0.9998 0.0003007 Eth | $1,172,885,407.00 353,196.239 ETH | 0.0000% |
24 | DigiFinex | ETH-USDT | $0.9999 0.0003002 Eth | $1,163,608,335.00 349,444.536 ETH | 0.0000% |
25 | AscendEX (BitMax) | BTC-USDT | $0.9999 0.0003009 Eth | $916,403,812.00 9,910.749 BTC | 0.0000% |
26 | MEXC | BTC-USDT | $1.00 0.0003010 Eth | $880,974,933.00 9,540.490 BTC | 0.0000% |
27 | Ourbit | ETH-USDT | $0.9998 0.0003007 Eth | $856,036,665.00 249,554.093 ETH | 0.0000% |
28 | Hotcoin | ETH-USDT | $0.9996 0.0003015 Eth | $850,507,412.00 256,690.748 ETH | 0.0000% |
29 | LBank | BTC-USDT | $0.9996 0.0003015 Eth | $843,457,725.00 9,151.640 BTC | 0.0000% |
30 | Bitunix | ETH-USDT | $0.9999 0.0003003 Eth | $843,437,311.00 253,096.873 ETH | 0.0000% |
31 | HTX | BTC-USDT | $1.00 0.0003010 Eth | $748,422,021.00 7,916.635 BTC | 0.0000% |
32 | Tapbit | BTC-USDT | $0.9999 0.0003009 Eth | $649,521,071.00 6,880.878 BTC | 0.0000% |
33 | Binance | XLM-USDT | $1.00 0.0003010 Eth | $587,343,489.00 1,209,510,140.000 XLM | 0.0079% |
34 | Binance | ADA-USDT | $1.001 0.0003007 Eth | $534,079,770.00 553,212,606.800 ADA | 0.0036% |
35 | OrangeX | ETH-USDT | $0.9998 0.0003007 Eth | $526,065,095.00 153,199.995 ETH | 0.0000% |
36 | Coinbase Exchange | USDT-USD | $1.00 0.0003003 Eth | $519,186,417.00 519,181,224.960 USDT | 0.0034% |
37 | Bitget | XRP-USDT | $0.9999 0.0003003 Eth | $495,603,118.00 350,009,445.187 XRP | 0.0023% |
38 | Bitget | DOGE-USDT | $0.9999 0.0003003 Eth | $438,170,820.00 1,098,543,384.003 DOGE | 0.0072% |
39 | BTSE | BTC-USDT | $0.9998 0.0003007 Eth | $428,125,258.00 4,635.508 BTC | 0.0000% |
40 | Binance | WIF-USDT | $1.001 0.0003007 Eth | $420,847,056.00 127,349,975.270 WIF | 0.0008% |
41 | KuCoin | BTC-USDT | $0.9999 0.0003009 Eth | $364,370,534.00 3,940.776 BTC | 0.0000% |
42 | Binance | SUI-USDT | $0.9996 0.0003015 Eth | $334,565,192.00 105,013,800.400 SUI | 0.0007% |
43 | Bitget | BTC-USDT | $0.9999 0.0003003 Eth | $322,392,832.00 3,407.911 BTC | 0.0000% |
44 | Biconomy.com | ETH-USDT | $1.00 0.0003010 Eth | $310,767,376.00 90,544.959 ETH | 0.0000% |
45 | Coinstore | ETH-USDT | $0.9999 0.0003007 Eth | $294,958,250.00 85,908.611 ETH | 0.0000% |
46 | Kraken | USDT-USD | $1.00 0.0003003 Eth | $290,986,141.00 290,983,231.330 USDT | 0.0019% |
47 | Bitunix | DOGE-USDT | $0.9999 0.0003003 Eth | $265,969,383.00 702,050,319.000 DOGE | 0.0046% |
48 | KuCoin | ETH-USDT | $0.9999 0.0003009 Eth | $263,976,095.00 79,223.874 ETH | 0.0000% |
49 | MEXC | DOGE-USDT | $0.9999 0.0003007 Eth | $262,719,833.00 700,007,613.460 DOGE | 0.0046% |
50 | Bitget | ETH-USDT | $0.9999 0.0003003 Eth | $254,169,858.00 74,045.674 ETH | 0.0000% |
51 | Binance | ARB-USDT | $0.9999 0.0003007 Eth | $249,923,107.00 275,445,831.600 ARB | 0.0018% |
52 | Binance | WLD-USDT | $1.001 0.0003007 Eth | $239,789,896.00 97,376,400.900 WLD | 0.0006% |
53 | WEEX | DOGE-USDT | $0.9997 0.0003016 Eth | $229,957,388.00 613,852,069.376 DOGE | 0.0040% |
54 | Binance | FTM-USDT | $1.00 0.0003010 Eth | $223,107,829.00 230,362,094.000 FTM | 0.0015% |
55 | DigiFinex | DOGE-USDT | $0.9999 0.0003002 Eth | $219,194,485.00 579,744,658.270 DOGE | 0.0038% |
56 | Binance | SHIB-USDT | $0.9996 0.0003015 Eth | $214,448,866.00 8,574,398,054,435.000 SHIB | 55.8766% |
57 | HTX | ETH-USDT | $1.00 0.0003010 Eth | $213,774,576.00 62,390.932 ETH | 0.0000% |
58 | BTSE | ETH-USDT | $0.9999 0.0003002 Eth | $208,364,133.00 62,545.709 ETH | 0.0000% |
59 | Binance | TIA-USDT | $1.001 0.0003008 Eth | $206,649,373.00 26,327,207.560 TIA | 0.0002% |
60 | Binance | NEIRO-USDT | $0.9997 0.0003017 Eth | $206,311,628.00 114,134,497,791.000 NEIRO | 0.7438% |
61 | HTX | DOGE-USDT | $1.00 0.0003010 Eth | $199,720,462.00 498,392,089.604 DOGE | 0.0032% |
62 | MEXC | SOL-USDT | $0.9998 0.0003007 Eth | $180,407,106.00 791,551.680 SOL | 0.0000% |
63 | Fastex | BTC-USDT | $0.9998 0.0003007 Eth | $179,486,611.00 1,943.127 BTC | 0.0000% |
64 | Bitunix | SOL-USDT | $1.00 0.0003010 Eth | $179,484,275.00 785,186.002 SOL | 0.0000% |
65 | Bitunix | XRP-USDT | $0.9997 0.0003015 Eth | $170,641,913.00 129,004,447.000 XRP | 0.0008% |
66 | WhiteBIT | DOGE-USDT | $0.9999 0.0003008 Eth | $165,735,670.00 441,871,189.200 DOGE | 0.0029% |
67 | Binance | UNI-USDT | $1.00 0.0003010 Eth | $147,661,308.00 12,793,909.360 UNI | 0.0001% |
68 | LBank | DOGE-USDT | $0.9999 0.0003002 Eth | $139,329,378.00 368,344,868.000 DOGE | 0.0024% |
69 | Bybit | MNT-USDT | $0.9999 0.0003003 Eth | $131,696,336.00 157,400,428.720 MNT | 0.0010% |
70 | Slex | BTC-USDT | $0.9998 0.0003017 Eth | $124,896,450.00 1,322.920 BTC | 0.0000% |
71 | Gate.io | PEPE-USDT | $0.9999 0.0003002 Eth | $124,139,218.00 6,521,348,397,326.200 PEPE | 42.4975% |
72 | Binance | RUNE-USDT | $1.00 0.0003010 Eth | $117,901,158.00 21,540,913.700 RUNE | 0.0001% |
73 | Bitget | SOL-USDT | $0.9999 0.0003003 Eth | $116,469,769.00 491,106.401 SOL | 0.0000% |
74 | BTSE | DOGE-USDT | $0.9998 0.0003007 Eth | $112,073,634.00 298,373,667.058 DOGE | 0.0019% |
75 | DigiFinex | SOL-USDT | $0.9999 0.0003002 Eth | $110,092,176.00 481,625.530 SOL | 0.0000% |
76 | Binance | POL-USDT | $0.9999 0.0003009 Eth | $107,756,617.00 194,340,631.100 POL | 0.0013% |
77 | WhiteBIT | WIF-USDT | $1.002 0.0003014 Eth | $101,646,915.00 33,838,231.910 WIF | 0.0002% |
78 | Binance | LTC-USDT | $0.9999 0.0003007 Eth | $99,196,351.00 1,062,592.177 LTC | 0.0000% |
79 | Binance | HBAR-USDT | $0.9998 0.0003007 Eth | $97,050,137.00 713,806,969.000 HBAR | 0.0047% |
80 | Binance | BOME-USDT | $0.9997 0.0003005 Eth | $92,502,159.00 10,297,518,709.000 BOME | 0.0671% |
81 | DigiFinex | TRX-USDT | $0.9999 0.0003002 Eth | $90,369,896.00 476,689,965.200 TRX | 0.0031% |
82 | Binance | AAVE-USDT | $0.9996 0.0003015 Eth | $90,141,274.00 503,616.394 AAVE | 0.0000% |
83 | XT.COM | SAND-USDT | $0.9998 0.0003007 Eth | $89,039,712.00 126,868,303.000 SAND | 0.0008% |
84 | Bitget | SEI-USDT | $0.9999 0.0003003 Eth | $88,105,523.00 139,746,266.560 SEI | 0.0009% |
85 | Binance | TON-USDT | $0.9999 0.0003007 Eth | $87,077,081.00 14,342,031.230 TON | 0.0001% |
86 | KuCoin | SOL-USDT | $0.9999 0.0003009 Eth | $86,935,502.00 380,080.064 SOL | 0.0000% |
87 | Bitget | SUI-USDT | $0.9999 0.0003003 Eth | $86,543,980.00 27,164,428.540 SUI | 0.0002% |
88 | WhiteBIT | PNUT-USDT | $1.00 0.0003010 Eth | $86,289,591.00 79,613,834.600 PNUT | 0.0005% |
89 | KuCoin | DOGE-USDT | $0.9999 0.0003009 Eth | $77,273,381.00 204,270,631.359 DOGE | 0.0013% |
90 | Binance | DOGS-USDT | $0.9998 0.0003017 Eth | $76,088,415.00 107,792,479,819.000 DOGS | 0.7024% |
91 | WhiteBIT | MKR-USDT | $0.9997 0.0003016 Eth | $70,109,262.00 41,217.239 MKR | 0.0000% |
92 | BingX | BTC-USDT | $0.9999 0.0003002 Eth | $69,735,629.00 737.424 BTC | 0.0000% |
93 | Ourbit | SOL-USDT | $0.9998 0.0003007 Eth | $69,573,676.00 292,902.470 SOL | 0.0000% |
94 | CoinW | XRP-USDT | $0.9997 0.0003007 Eth | $68,928,874.00 51,682,831.300 XRP | 0.0003% |
95 | Bitunix | ADA-USDT | $0.9999 0.0003003 Eth | $63,534,012.00 69,611,403.600 ADA | 0.0005% |
96 | BingX | ETH-USDT | $0.9999 0.0003002 Eth | $61,111,537.00 17,801.701 ETH | 0.0000% |
97 | WhiteBIT | ETC-USDT | $0.9999 0.0003008 Eth | $60,969,127.00 2,178,845.383 ETC | 0.0000% |
98 | Bitunix | BNB-USDT | $1.00 0.0003010 Eth | $56,259,987.00 90,542.960 BNB | 0.0000% |
99 | OKX | LTC-USDT | $1.001 0.0003007 Eth | $51,486,377.00 551,764.089 LTC | 0.0000% |
100 | Kraken | BTC-USDT | $1.00 0.0003003 Eth | $46,014,151.00 497.754 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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