Overview
Max Total Supply
54,940,840,345.993792 USDT
Holders
6,281,794 ( -0.040%)
Market
Price
$1.00 @ 0.000402 ETH (-0.32%)
Onchain Market Cap
$54,877,328,734.55
Circulating Supply Market Cap
$120,436,857,060.00
Other Info
Token Contract (WITH 6 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | BTC-USDT | $0.9996 0.0004022 Eth | $1,195,341,279.00 17,204.715 BTC | 0.0000% |
2 | WEEX | BTC-USDT | $0.9996 0.0004011 Eth | $1,122,493,310.00 16,140.579 BTC | 0.0000% |
3 | CoinW | BTC-USDT | $0.9996 0.0004023 Eth | $1,049,180,634.00 15,130.379 BTC | 0.0000% |
4 | FameEX | BTC-USDT | $0.9994 0.0004017 Eth | $1,028,585,286.00 14,798.724 BTC | 0.0000% |
5 | Bybit | BTC-USDT | $0.9996 0.0004022 Eth | $870,111,739.00 12,527.909 BTC | 0.0000% |
6 | Ourbit | BTC-USDT | $0.9996 0.0004017 Eth | $793,760,934.00 11,420.414 BTC | 0.0000% |
7 | Toobit | BTC-USDT | $0.9996 0.0004020 Eth | $719,183,299.00 10,346.454 BTC | 0.0000% |
8 | MEXC | BTC-USDT | $1.00 0.0004025 Eth | $624,842,186.00 9,008.624 BTC | 0.0000% |
9 | Pionex | BTC-USDT | $0.9997 0.0004023 Eth | $611,699,243.00 8,803.299 BTC | 0.0000% |
10 | BitMart | BTC-USDT | $0.9996 0.0004023 Eth | $575,763,850.00 8,308.072 BTC | 0.0000% |
11 | Binance | ETH-USDT | $1.00 0.0004016 Eth | $535,528,548.00 213,812.328 ETH | 0.0000% |
12 | OrangeX | BTC-USDT | $0.9998 0.0004025 Eth | $535,109,451.00 7,697.440 BTC | 0.0000% |
13 | AscendEX (BitMax) | BTC-USDT | $0.9997 0.0004023 Eth | $468,381,533.00 6,753.248 BTC | 0.0000% |
14 | P2B | BTC-USDT | $0.9997 0.0004024 Eth | $454,753,028.00 6,557.682 BTC | 0.0000% |
15 | DigiFinex | BTC-USDT | $0.9998 0.0004023 Eth | $430,900,596.00 6,211.882 BTC | 0.0000% |
16 | BVOX | ETH-USDT | $0.9996 0.0004011 Eth | $388,753,249.00 155,256.510 ETH | 0.0000% |
17 | WEEX | ETH-USDT | $0.9998 0.0004025 Eth | $383,195,725.00 153,038.050 ETH | 0.0000% |
18 | LBank | BTC-USDT | $0.9996 0.0004022 Eth | $378,590,473.00 5,458.627 BTC | 0.0000% |
19 | Tapbit | ETH-USDT | $0.9994 0.0004025 Eth | $366,816,084.00 146,661.658 ETH | 0.0000% |
20 | OKX | BTC-USDT | $0.9996 0.0004022 Eth | $352,847,747.00 5,080.841 BTC | 0.0000% |
21 | Hotcoin | ETH-USDT | $0.9994 0.0004025 Eth | $352,344,750.00 141,926.063 ETH | 0.0000% |
22 | Binance | SOL-USDT | $0.9996 0.0004022 Eth | $281,947,263.00 1,703,749.519 SOL | 0.0000% |
23 | BitMart | ETH-USDT | $0.9997 0.0004023 Eth | $276,873,324.00 111,489.471 ETH | 0.0000% |
24 | HTX | BTC-USDT | $0.9997 0.0004023 Eth | $256,251,445.00 3,688.996 BTC | 0.0000% |
25 | AscendEX (BitMax) | ETH-USDT | $0.9997 0.0004023 Eth | $254,636,506.00 102,454.052 ETH | 0.0000% |
26 | XT.COM | BTC-USDT | $0.9997 0.0004023 Eth | $250,471,070.00 3,604.485 BTC | 0.0000% |
27 | Bitunix | BTC-USDT | $0.9996 0.0004022 Eth | $247,707,033.00 3,571.824 BTC | 0.0000% |
28 | Binance | DOGE-USDT | $0.9996 0.0004022 Eth | $243,678,433.00 1,525,513,149.000 DOGE | 0.0170% |
29 | Bybit | ETH-USDT | $0.9996 0.0004022 Eth | $240,862,575.00 96,275.521 ETH | 0.0000% |
30 | WhiteBIT | ETH-USDT | $1.00 0.0004016 Eth | $231,576,027.00 92,982.432 ETH | 0.0000% |
31 | MEXC | ETH-USDT | $0.9997 0.0004024 Eth | $218,812,523.00 88,097.793 ETH | 0.0000% |
32 | Bitget | BTC-USDT | $0.9997 0.0004023 Eth | $217,513,943.00 3,129.234 BTC | 0.0000% |
33 | P2B | ETH-USDT | $0.9998 0.0004022 Eth | $204,905,961.00 82,431.698 ETH | 0.0000% |
34 | OrangeX | ETH-USDT | $0.9994 0.0004025 Eth | $187,846,866.00 75,065.060 ETH | 0.0000% |
35 | Deepcoin | ETH-USDT | $0.9996 0.0004022 Eth | $183,115,358.00 95,442.001 ETH | 0.0000% |
36 | CoinW | ETH-USDT | $0.9996 0.0004023 Eth | $181,725,293.00 73,140.158 ETH | 0.0000% |
37 | DigiFinex | ETH-USDT | $0.9998 0.0004023 Eth | $176,445,521.00 70,987.383 ETH | 0.0000% |
38 | Biconomy.com | BTC-USDT | $0.9997 0.0004017 Eth | $164,162,233.00 2,361.633 BTC | 0.0000% |
39 | BTSE | BTC-USDT | $1.00 0.0004016 Eth | $154,082,327.00 2,219.580 BTC | 0.0000% |
40 | Coinbase Exchange | USDT-USD | $0.9996 0.0004022 Eth | $153,508,983.00 153,564,266.300 USDT | 0.0017% |
41 | XT.COM | ETH-USDT | $0.9996 0.0004023 Eth | $143,175,047.00 57,216.680 ETH | 0.0000% |
42 | LBank | ETH-USDT | $0.9996 0.0004022 Eth | $143,132,305.00 57,596.212 ETH | 0.0000% |
43 | OKX | ETH-USDT | $0.9997 0.0004023 Eth | $141,883,724.00 56,719.102 ETH | 0.0000% |
44 | BigONE | BTC-USDT | $0.9997 0.0004023 Eth | $141,722,813.00 2,043.394 BTC | 0.0000% |
45 | Tapbit | BTC-USDT | $0.9997 0.0004024 Eth | $140,192,212.00 2,018.820 BTC | 0.0000% |
46 | Bitget | ETH-USDT | $0.9997 0.0004023 Eth | $122,696,137.00 48,971.980 ETH | 0.0000% |
47 | Fastex | BTC-USDT | $0.9997 0.0004023 Eth | $122,416,745.00 1,765.187 BTC | 0.0000% |
48 | Binance | SUI-USDT | $0.9996 0.0004022 Eth | $116,867,391.00 59,585,314.400 SUI | 0.0007% |
49 | Gate.io | BTC-USDT | $0.9996 0.0004022 Eth | $104,558,081.00 1,504.357 BTC | 0.0000% |
50 | Binance | NEIRO-USDT | $0.9997 0.0004019 Eth | $100,807,003.00 69,791,297,135.000 NEIRO | 0.7768% |
51 | Biconomy.com | ETH-USDT | $0.9996 0.0004022 Eth | $99,399,152.00 39,696.662 ETH | 0.0000% |
52 | Gate.io | ETH-USDT | $0.9996 0.0004022 Eth | $97,828,620.00 39,094.174 ETH | 0.0000% |
53 | Coinstore | BTC-USDT | $0.9996 0.0004019 Eth | $97,225,841.00 1,399.296 BTC | 0.0000% |
54 | KuCoin | ETH-USDT | $0.9997 0.0004023 Eth | $95,501,989.00 38,424.848 ETH | 0.0000% |
55 | Bitunix | ETH-USDT | $0.9997 0.0004024 Eth | $90,786,897.00 36,579.226 ETH | 0.0000% |
56 | Binance | BNB-USDT | $0.9996 0.0004022 Eth | $89,762,172.00 157,214.668 BNB | 0.0000% |
57 | KuCoin | BTC-USDT | $0.9997 0.0004023 Eth | $88,086,119.00 1,269.981 BTC | 0.0000% |
58 | Bybit | SOL-USDT | $0.9996 0.0004022 Eth | $83,275,900.00 503,088.551 SOL | 0.0000% |
59 | Deepcoin | UXLINK-USDT | $0.9996 0.0004022 Eth | $77,755,242.00 141,720,021.254 UXLINK | 0.0016% |
60 | Coinstore | ETH-USDT | $0.9997 0.0004023 Eth | $77,747,245.00 31,058.803 ETH | 0.0000% |
61 | LBank | SOL-USDT | $0.9996 0.0004017 Eth | $77,260,056.00 471,550.715 SOL | 0.0000% |
62 | Dex-Trade | BTC-USDT | $0.9996 0.0004023 Eth | $74,522,417.00 1,074.743 BTC | 0.0000% |
63 | OKX | DOGE-USDT | $0.9997 0.0004023 Eth | $73,813,901.00 462,382,688.850 DOGE | 0.0051% |
64 | Bybit | USDC-USDT | $0.9996 0.0004022 Eth | $73,494,102.00 73,493,068.060 USDC | 0.0008% |
65 | Bitget | DOGE-USDT | $0.9997 0.0004023 Eth | $72,583,867.00 454,152,083.655 DOGE | 0.0051% |
66 | FameEX | SOL-USDT | $0.9997 0.0004023 Eth | $72,347,541.00 437,058.773 SOL | 0.0000% |
67 | WhiteBIT | SOL-USDT | $0.9998 0.0004025 Eth | $71,447,353.00 435,887.415 SOL | 0.0000% |
68 | OKX | SOL-USDT | $0.9997 0.0004023 Eth | $69,456,714.00 419,329.934 SOL | 0.0000% |
69 | LATOKEN | ETH-USDT | $0.9994 0.0004025 Eth | $67,707,384.00 27,289.319 ETH | 0.0000% |
70 | BTSE | ETH-USDT | $0.9996 0.0004013 Eth | $67,647,249.00 27,200.879 ETH | 0.0000% |
71 | Bitget | SOL-USDT | $0.9997 0.0004023 Eth | $67,137,527.00 404,253.045 SOL | 0.0000% |
72 | Hotcoin | DOGE-USDT | $0.9994 0.0004025 Eth | $59,628,814.00 379,102,325.221 DOGE | 0.0042% |
73 | WhiteBIT | DOGE-USDT | $0.9999 0.0004018 Eth | $54,606,858.00 346,397,994.000 DOGE | 0.0039% |
74 | Bybit | MNT-USDT | $0.9996 0.0004022 Eth | $51,749,564.00 89,804,369.310 MNT | 0.0010% |
75 | Binance | XRP-USDT | $0.9996 0.0004022 Eth | $51,619,398.00 100,585,761.000 XRP | 0.0011% |
76 | BigONE | ETH-USDT | $0.9998 0.0004022 Eth | $51,482,988.00 20,714.804 ETH | 0.0000% |
77 | Binance | TIA-USDT | $0.9996 0.0004022 Eth | $45,215,774.00 9,892,922.420 TIA | 0.0001% |
78 | HTX | PEPE-USDT | $0.9997 0.0004023 Eth | $43,997,101.00 4,956,356,894,753.410 PEPE | 55.1676% |
79 | BingX | BTC-USDT | $0.9996 0.0004022 Eth | $43,572,105.00 627.152 BTC | 0.0000% |
80 | Bybit | DOGE-USDT | $0.9996 0.0004022 Eth | $43,282,718.00 270,683,261.600 DOGE | 0.0030% |
81 | Bitget | BGB-USDT | $0.9997 0.0004023 Eth | $42,573,457.00 37,663,482.014 BGB | 0.0004% |
82 | Coinbase Exchange | BTC-USDT | $0.9996 0.0004022 Eth | $38,509,421.00 555.344 BTC | 0.0000% |
83 | Binance | RUNE-USDT | $0.9996 0.0004022 Eth | $38,355,431.00 6,778,681.200 RUNE | 0.0001% |
84 | MEXC | MX-USDT | $0.9997 0.0004023 Eth | $38,044,074.00 13,981,857.180 MX | 0.0002% |
85 | Gate.io | DOGE-USDT | $0.9996 0.0004022 Eth | $37,490,479.00 235,174,539.614 DOGE | 0.0026% |
86 | Bybit | APEX-USDT | $0.9996 0.0004022 Eth | $37,490,032.00 27,290,499.010 APEX | 0.0003% |
87 | MEXC | SUI-USDT | $0.9997 0.0004024 Eth | $37,364,072.00 19,570,883.050 SUI | 0.0002% |
88 | CoinEx | BTC-USDT | $0.9997 0.0004023 Eth | $37,104,696.00 533.785 BTC | 0.0000% |
89 | HTX | ETH-USDT | $0.9996 0.0004022 Eth | $36,227,095.00 14,475.113 ETH | 0.0000% |
90 | Bitget | PEPE-USDT | $0.9997 0.0004023 Eth | $34,992,192.00 3,946,369,605,027.000 PEPE | 43.9258% |
91 | OKX | SUI-USDT | $0.9997 0.0004023 Eth | $33,617,862.00 17,115,153.841 SUI | 0.0002% |
92 | Gate.io | SUI-USDT | $0.9996 0.0004022 Eth | $31,844,115.00 16,230,687.620 SUI | 0.0002% |
93 | Binance | BOME-USDT | $0.9997 0.0004024 Eth | $30,764,492.00 3,984,679,737.000 BOME | 0.0444% |
94 | BYDFi | BTC-USDT | $0.9997 0.0004017 Eth | $28,690,670.00 413.436 BTC | 0.0000% |
95 | Bitget | TURBO-USDT | $0.9997 0.0004023 Eth | $26,041,368.00 3,072,793,124.000 TURBO | 0.0342% |
96 | DigiFinex | DOGE-USDT | $0.9998 0.0004023 Eth | $23,584,103.00 149,644,541.320 DOGE | 0.0017% |
97 | WhiteBIT | LINK-USDT | $0.9998 0.0004025 Eth | $22,516,205.00 2,017,144.260 LINK | 0.0000% |
98 | BingX | ETH-USDT | $0.9996 0.0004022 Eth | $22,196,380.00 8,868.399 ETH | 0.0000% |
99 | HashKey Global | BTC-USDT | $0.9997 0.0004022 Eth | $20,646,957.00 296.848 BTC | 0.0000% |
100 | Azbit | BTC-USDT | $1.00 0.0004019 Eth | $15,875,140.00 228.240 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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