Overview
Max Total Supply
69,929,452,093.657795 USDT
Holders
6,425,520 ( 0.031%)
Market
Price
$1.00 @ 0.000288 ETH (+0.05%)
Onchain Market Cap
$69,999,381,545.75
Circulating Supply Market Cap
$132,827,001,164.00
Other Info
Token Contract (WITH 6 Decimals)
Balance
1 USDTValue
$1.00 ( ~0.000287412578750206 Eth) [0.0000%]Loading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | BTC-USDT | $1.00 0.0002871 Eth | $4,137,913,702.00 44,600.537 BTC | 0.0000% |
2 | Bybit | BTC-USDT | $1.00 0.0002870 Eth | $3,322,441,601.00 35,779.653 BTC | 0.0000% |
3 | BVOX | BTC-USDT | $1.00 0.0002870 Eth | $3,141,804,380.00 33,859.190 BTC | 0.0000% |
4 | Ourbit | BTC-USDT | $1.00 0.0002871 Eth | $2,490,398,528.00 26,847.143 BTC | 0.0000% |
5 | Binance | ETH-USDT | $1.00 0.0002872 Eth | $2,216,774,901.00 657,121.896 ETH | 0.0000% |
6 | WhiteBIT | BTC-USDT | $1.00 0.0002872 Eth | $2,107,986,520.00 22,322.911 BTC | 0.0000% |
7 | OrangeX | BTC-USDT | $1.00 0.0002872 Eth | $1,929,155,288.00 20,804.967 BTC | 0.0000% |
8 | Pionex | ETH-USDT | $1.001 0.0002870 Eth | $1,602,169,812.00 475,194.182 ETH | 0.0000% |
9 | FameEX | ETH-USDT | $1.001 0.0002870 Eth | $1,479,584,656.00 438,440.759 ETH | 0.0000% |
10 | BitMart | BTC-USDT | $1.00 0.0002871 Eth | $1,384,562,853.00 14,670.176 BTC | 0.0000% |
11 | Binance | DOGE-USDT | $1.00 0.0002872 Eth | $1,209,845,769.00 3,125,373,693.000 DOGE | 0.0352% |
12 | CoinW | ETH-USDT | $1.00 0.0002873 Eth | $1,029,667,182.00 295,810.577 ETH | 0.0000% |
13 | BVOX | ETH-USDT | $1.00 0.0002870 Eth | $1,012,038,312.00 299,786.304 ETH | 0.0000% |
14 | OKX | BTC-USDT | $1.00 0.0002871 Eth | $992,497,319.00 10,684.773 BTC | 0.0000% |
15 | AscendEX (BitMax) | BTC-USDT | $1.00 0.0002872 Eth | $952,722,709.00 10,086.170 BTC | 0.0000% |
16 | Binance | SOL-USDT | $1.00 0.0002871 Eth | $923,244,927.00 3,987,778.896 SOL | 0.0000% |
17 | WEEX | ETH-USDT | $1.001 0.0002862 Eth | $921,975,275.00 274,088.284 ETH | 0.0000% |
18 | BitMart | ETH-USDT | $1.00 0.0002871 Eth | $903,206,436.00 259,735.447 ETH | 0.0000% |
19 | Binance | FDUSD-USDT | $1.001 0.0002872 Eth | $847,642,042.00 848,632,396.000 FDUSD | 0.0095% |
20 | Binance | XRP-USDT | $1.00 0.0002872 Eth | $827,034,670.00 591,593,394.000 XRP | 0.0067% |
21 | Bybit | ETH-USDT | $1.00 0.0002870 Eth | $822,737,363.00 243,981.680 ETH | 0.0000% |
22 | DigiFinex | ETH-USDT | $1.001 0.0002872 Eth | $797,938,792.00 229,280.604 ETH | 0.0000% |
23 | Ourbit | ETH-USDT | $1.00 0.0002857 Eth | $697,586,238.00 206,877.631 ETH | 0.0000% |
24 | XT.COM | ETH-USDT | $1.00 0.0002870 Eth | $621,936,573.00 184,291.697 ETH | 0.0000% |
25 | HTX | BTC-USDT | $1.00 0.0002870 Eth | $608,818,939.00 6,555.105 BTC | 0.0000% |
26 | Binance | XLM-USDT | $1.001 0.0002873 Eth | $591,500,772.00 1,263,059,963.000 XLM | 0.0142% |
27 | WhiteBIT | ETH-USDT | $1.00 0.0002872 Eth | $583,933,435.00 167,767.914 ETH | 0.0000% |
28 | MEXC | ETH-USDT | $1.00 0.0002872 Eth | $550,434,824.00 158,276.999 ETH | 0.0000% |
29 | OKX | ETH-USDT | $1.001 0.0002872 Eth | $542,073,878.00 160,160.981 ETH | 0.0000% |
30 | AscendEX (BitMax) | ETH-USDT | $1.00 0.0002872 Eth | $530,847,542.00 152,657.629 ETH | 0.0000% |
31 | OKX | DOGE-USDT | $1.001 0.0002872 Eth | $459,361,695.00 1,186,312,747.424 DOGE | 0.0133% |
32 | OrangeX | ETH-USDT | $1.00 0.0002870 Eth | $458,043,253.00 135,661.385 ETH | 0.0000% |
33 | Tapbit | BTC-USDT | $1.00 0.0002872 Eth | $452,445,931.00 4,876.755 BTC | 0.0000% |
34 | BTSE | BTC-USDT | $1.001 0.0002872 Eth | $366,968,557.00 3,883.778 BTC | 0.0000% |
35 | Binance | SUI-USDT | $1.00 0.0002871 Eth | $366,083,353.00 107,827,925.800 SUI | 0.0012% |
36 | LATOKEN | ETH-USDT | $1.00 0.0002872 Eth | $353,190,893.00 101,569.560 ETH | 0.0000% |
37 | Biconomy.com | BTC-USDT | $1.00 0.0002870 Eth | $346,437,853.00 3,732.193 BTC | 0.0000% |
38 | KuCoin | BTC-USDT | $1.00 0.0002870 Eth | $311,281,849.00 3,293.109 BTC | 0.0000% |
39 | Bitget | XRP-USDT | $1.00 0.0002870 Eth | $307,799,275.00 220,455,280.946 XRP | 0.0025% |
40 | Binance | FTM-USDT | $1.001 0.0002872 Eth | $294,499,178.00 275,970,959.000 FTM | 0.0031% |
41 | Bybit | XRP-USDT | $1.00 0.0002870 Eth | $289,327,683.00 207,463,665.300 XRP | 0.0023% |
42 | Hotcoin | DOGE-USDT | $1.001 0.0002870 Eth | $281,823,493.00 715,055,274.851 DOGE | 0.0080% |
43 | Bitget | BTC-USDT | $1.00 0.0002870 Eth | $273,830,010.00 2,949.724 BTC | 0.0000% |
44 | Gate.io | ETH-USDT | $1.00 0.0002872 Eth | $255,217,562.00 75,811.433 ETH | 0.0000% |
45 | Bitget | DOGE-USDT | $1.00 0.0002870 Eth | $245,319,533.00 633,593,841.877 DOGE | 0.0071% |
46 | Gate.io | BTC-USDT | $1.00 0.0002872 Eth | $236,844,179.00 2,552.485 BTC | 0.0000% |
47 | WhiteBIT | SOL-USDT | $1.00 0.0002873 Eth | $235,441,346.00 993,213.953 SOL | 0.0000% |
48 | Coinstore | ETH-USDT | $1.00 0.0002872 Eth | $233,695,968.00 69,133.796 ETH | 0.0000% |
49 | Bybit | SOL-USDT | $1.00 0.0002870 Eth | $219,070,133.00 947,310.954 SOL | 0.0000% |
50 | Biconomy.com | ETH-USDT | $1.00 0.0002870 Eth | $217,185,979.00 64,325.149 ETH | 0.0000% |
51 | CoinW | DOGE-USDT | $1.00 0.0002870 Eth | $206,026,677.00 523,053,896.553 DOGE | 0.0059% |
52 | MEXC | XRP-USDT | $1.00 0.0002872 Eth | $203,184,325.00 140,744,070.640 XRP | 0.0016% |
53 | MEXC | DOGE-USDT | $1.00 0.0002872 Eth | $201,159,315.00 511,044,486.070 DOGE | 0.0057% |
54 | Binance | TIA-USDT | $1.001 0.0002872 Eth | $199,974,656.00 24,462,699.710 TIA | 0.0003% |
55 | KuCoin | ETH-USDT | $1.00 0.0002870 Eth | $183,576,359.00 52,757.827 ETH | 0.0000% |
56 | HTX | DOGE-USDT | $1.00 0.0002872 Eth | $182,080,291.00 469,563,486.444 DOGE | 0.0053% |
57 | LBank | SOL-USDT | $1.00 0.0002872 Eth | $176,565,972.00 744,050.050 SOL | 0.0000% |
58 | HTX | ETH-USDT | $1.00 0.0002872 Eth | $174,978,968.00 51,800.825 ETH | 0.0000% |
59 | BTSE | ETH-USDT | $1.00 0.0002873 Eth | $174,233,357.00 50,161.158 ETH | 0.0000% |
60 | WEEX | DOGE-USDT | $1.00 0.0002858 Eth | $166,006,914.00 430,811,815.400 DOGE | 0.0048% |
61 | Deepcoin | SOL-USDT | $1.00 0.0002872 Eth | $165,597,736.00 772,240.603 SOL | 0.0000% |
62 | Bitget | ETH-USDT | $1.00 0.0002870 Eth | $164,563,533.00 48,858.099 ETH | 0.0000% |
63 | Bybit | DOGE-USDT | $1.00 0.0002870 Eth | $164,422,085.00 424,928,721.000 DOGE | 0.0048% |
64 | WhiteBIT | XRP-USDT | $1.00 0.0002872 Eth | $162,069,964.00 112,283,290.880 XRP | 0.0013% |
65 | Fastex | BTC-USDT | $1.00 0.0002871 Eth | $162,040,300.00 1,715.777 BTC | 0.0000% |
66 | Gate.io | DOGE-USDT | $1.00 0.0002870 Eth | $155,872,120.00 402,045,742.770 DOGE | 0.0045% |
67 | DigiFinex | DOGE-USDT | $1.001 0.0002872 Eth | $152,855,758.00 387,890,376.630 DOGE | 0.0044% |
68 | Gate.io | XRP-USDT | $1.00 0.0002872 Eth | $149,844,649.00 107,067,839.307 XRP | 0.0012% |
69 | Deepcoin | XRP-USDT | $1.00 0.0002873 Eth | $149,111,261.00 109,675,722.718 XRP | 0.0012% |
70 | Binance | NEAR-USDT | $1.00 0.0002872 Eth | $144,164,119.00 22,337,270.900 NEAR | 0.0003% |
71 | LBank | DOGE-USDT | $0.9994 0.0002872 Eth | $137,443,206.00 348,612,514.000 DOGE | 0.0039% |
72 | WhiteBIT | DOGE-USDT | $1.00 0.0002872 Eth | $137,392,039.00 348,532,649.100 DOGE | 0.0039% |
73 | Binance | ARB-USDT | $1.001 0.0002872 Eth | $137,097,168.00 153,799,282.000 ARB | 0.0017% |
74 | Binance | DOT-USDT | $1.001 0.0002872 Eth | $132,768,534.00 16,336,171.090 DOT | 0.0002% |
75 | Bybit | MNT-USDT | $1.00 0.0002870 Eth | $129,734,699.00 156,923,431.950 MNT | 0.0018% |
76 | Binance | NEIRO-USDT | $1.001 0.0002872 Eth | $125,661,246.00 74,328,174,461.000 NEIRO | 0.8362% |
77 | Bitget | BGB-USDT | $1.00 0.0002870 Eth | $124,673,518.00 79,137,506.137 BGB | 0.0009% |
78 | Deepcoin | DOGE-USDT | $1.00 0.0002873 Eth | $112,063,179.00 329,843,061.339 DOGE | 0.0037% |
79 | Bitget | SUI-USDT | $1.00 0.0002870 Eth | $109,340,414.00 32,193,792.360 SUI | 0.0004% |
80 | Binance | TAO-USDT | $1.001 0.0002872 Eth | $108,653,021.00 196,711.202 TAO | 0.0000% |
81 | WhiteBIT | TRX-USDT | $1.001 0.0002872 Eth | $101,490,331.00 503,431,028.160 TRX | 0.0057% |
82 | FameEX | BNB-USDT | $1.00 0.0002872 Eth | $98,229,335.00 159,285.705 BNB | 0.0000% |
83 | Binance | ENA-USDT | $1.001 0.0002872 Eth | $97,654,309.00 157,673,040.800 ENA | 0.0018% |
84 | Bitget | SOL-USDT | $1.00 0.0002870 Eth | $97,594,600.00 421,827.709 SOL | 0.0000% |
85 | BTSE | SOL-USDT | $1.001 0.0002872 Eth | $97,207,880.00 409,803.609 SOL | 0.0000% |
86 | WhiteBIT | NEAR-USDT | $1.00 0.0002872 Eth | $91,494,894.00 13,617,700.570 NEAR | 0.0002% |
87 | Gate.io | SOL-USDT | $1.00 0.0002872 Eth | $86,429,378.00 373,981.873 SOL | 0.0000% |
88 | WhiteBIT | PEPE-USDT | $1.00 0.0002873 Eth | $82,660,107.00 4,462,834,240,934.000 PEPE | 50.2044% |
89 | CoinW | SOL-USDT | $1.00 0.0002872 Eth | $79,908,844.00 337,084.719 SOL | 0.0000% |
90 | WhiteBIT | XLM-USDT | $1.001 0.0002872 Eth | $78,497,317.00 153,783,724.000 XLM | 0.0017% |
91 | KuCoin | SOL-USDT | $1.00 0.0002870 Eth | $76,817,741.00 323,783.112 SOL | 0.0000% |
92 | Bitget | SEI-USDT | $1.00 0.0002870 Eth | $75,311,520.00 112,105,606.060 SEI | 0.0013% |
93 | WhiteBIT | LINK-USDT | $1.00 0.0002872 Eth | $74,543,129.00 4,142,856.870 LINK | 0.0000% |
94 | Gate.io | PEPE-USDT | $1.00 0.0002872 Eth | $72,759,564.00 4,002,574,122,343.900 PEPE | 45.0267% |
95 | Binance | FLOKI-USDT | $1.00 0.0002872 Eth | $71,858,554.00 334,001,084,808.000 FLOKI | 3.7573% |
96 | Binance | LTC-USDT | $1.00 0.0002873 Eth | $69,094,792.00 740,624.572 LTC | 0.0000% |
97 | BingX | BTC-USDT | $1.00 0.0002870 Eth | $62,952,985.00 677.733 BTC | 0.0000% |
98 | BVOX | DOGE-USDT | $1.00 0.0002857 Eth | $62,838,657.00 161,908,840.000 DOGE | 0.0018% |
99 | CoinEx | DOGE-USDT | $1.001 0.0002869 Eth | $62,551,648.00 161,466,634.906 DOGE | 0.0018% |
100 | BingX | ETH-USDT | $1.00 0.0002870 Eth | $48,706,824.00 14,413.889 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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