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Overview
Max Total Supply
69,929,452,093.657795 USDT
Holders
6,431,826 ( 0.131%)
Market
Price
$1.00 @ 0.000276 ETH (+0.08%)
Onchain Market Cap
$69,929,452,093.66
Circulating Supply Market Cap
$132,865,284,619.00
Other Info
Token Contract (WITH 6 Decimals)
Balance
0.2 USDTValue
$0.20 ( ~5.51428976439687E-05 Eth) [0.0000%]Loading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | FameEX | BTC-USDT | $1.002 0.0002758 Eth | $8,491,398,937.00 89,666.153 BTC | 0.0000% |
2 | Binance | BTC-USDT | $1.001 0.0002759 Eth | $3,883,016,447.00 41,157.038 BTC | 0.0000% |
3 | BVOX | BTC-USDT | $1.001 0.0002747 Eth | $2,944,974,166.00 31,244.315 BTC | 0.0000% |
4 | CoinW | BTC-USDT | $1.001 0.0002751 Eth | $2,793,672,207.00 28,939.067 BTC | 0.0000% |
5 | Binance | ETH-USDT | $1.002 0.0002753 Eth | $2,460,311,856.00 706,930.192 ETH | 0.0000% |
6 | Ourbit | BTC-USDT | $1.001 0.0002752 Eth | $2,326,568,813.00 24,668.663 BTC | 0.0000% |
7 | Toobit | BTC-USDT | $1.001 0.0002749 Eth | $2,025,624,427.00 21,485.069 BTC | 0.0000% |
8 | Tapbit | ETH-USDT | $1.001 0.0002748 Eth | $1,761,293,108.00 506,369.840 ETH | 0.0000% |
9 | Hotcoin | BTC-USDT | $1.001 0.0002751 Eth | $1,731,128,474.00 17,927.470 BTC | 0.0000% |
10 | Pionex | ETH-USDT | $1.001 0.0002761 Eth | $1,668,840,052.00 480,965.067 ETH | 0.0000% |
11 | Toobit | ETH-USDT | $1.002 0.0002758 Eth | $1,617,113,247.00 464,435.817 ETH | 0.0000% |
12 | OrangeX | BTC-USDT | $1.001 0.0002749 Eth | $1,594,058,027.00 16,930.390 BTC | 0.0000% |
13 | DigiFinex | BTC-USDT | $1.001 0.0002761 Eth | $1,560,853,225.00 16,209.345 BTC | 0.0000% |
14 | WhiteBIT | BTC-USDT | $1.002 0.0002758 Eth | $1,487,805,868.00 15,420.697 BTC | 0.0000% |
15 | P2B | BTC-USDT | $1.001 0.0002755 Eth | $1,302,400,764.00 13,516.934 BTC | 0.0000% |
16 | Binance | THE-USDT | $1.002 0.0002753 Eth | $1,242,961,927.00 439,854,142.400 THE | 0.0015% |
17 | BitMart | BTC-USDT | $1.002 0.0002758 Eth | $1,209,098,689.00 12,526.848 BTC | 0.0000% |
18 | Binance | DOGE-USDT | $1.001 0.0002748 Eth | $1,147,975,449.00 2,908,707,751.000 DOGE | 0.0096% |
19 | BVOX | ETH-USDT | $1.002 0.0002758 Eth | $1,089,808,063.00 313,117.423 ETH | 0.0000% |
20 | BitMart | ETH-USDT | $1.002 0.0002758 Eth | $996,922,784.00 274,444.234 ETH | 0.0000% |
21 | OKX | BTC-USDT | $1.001 0.0002759 Eth | $987,331,309.00 10,475.736 BTC | 0.0000% |
22 | AscendEX (BitMax) | BTC-USDT | $1.002 0.0002758 Eth | $968,602,850.00 10,039.061 BTC | 0.0000% |
23 | Deepcoin | BTC-USDT | $1.001 0.0002758 Eth | $949,719,790.00 10,384.759 BTC | 0.0000% |
24 | WEEX | ETH-USDT | $1.001 0.0002747 Eth | $934,591,975.00 269,096.034 ETH | 0.0000% |
25 | DigiFinex | ETH-USDT | $1.001 0.0002761 Eth | $911,893,363.00 251,317.503 ETH | 0.0000% |
26 | Bybit | ETH-USDT | $1.001 0.0002758 Eth | $885,527,722.00 254,850.064 ETH | 0.0000% |
27 | P2B | ETH-USDT | $1.001 0.0002750 Eth | $882,838,096.00 242,862.518 ETH | 0.0000% |
28 | Binance | SOL-USDT | $1.001 0.0002748 Eth | $880,034,232.00 3,738,026.789 SOL | 0.0000% |
29 | MEXC | BTC-USDT | $1.001 0.0002748 Eth | $865,218,556.00 8,969.103 BTC | 0.0000% |
30 | Binance | XRP-USDT | $1.001 0.0002748 Eth | $844,726,645.00 587,368,043.000 XRP | 0.0019% |
31 | Binance | FDUSD-USDT | $1.001 0.0002748 Eth | $830,395,004.00 830,834,968.000 FDUSD | 0.0027% |
32 | Hotcoin | ETH-USDT | $1.001 0.0002751 Eth | $759,474,108.00 209,036.500 ETH | 0.0000% |
33 | Ourbit | ETH-USDT | $1.001 0.0002759 Eth | $754,657,761.00 217,286.729 ETH | 0.0000% |
34 | LBank | BTC-USDT | $1.001 0.0002752 Eth | $745,059,146.00 7,721.581 BTC | 0.0000% |
35 | OKX | ETH-USDT | $1.001 0.0002758 Eth | $699,597,087.00 200,530.707 ETH | 0.0000% |
36 | XT.COM | ETH-USDT | $1.002 0.0002758 Eth | $688,365,363.00 197,714.848 ETH | 0.0000% |
37 | MEXC | ETH-USDT | $1.001 0.0002748 Eth | $634,484,464.00 174,314.137 ETH | 0.0000% |
38 | Coinbase Exchange | USDT-USD | $1.001 0.0002759 Eth | $571,772,253.00 571,172,522.210 USDT | 0.0019% |
39 | HTX | BTC-USDT | $1.001 0.0002758 Eth | $549,593,209.00 5,837.105 BTC | 0.0000% |
40 | LATOKEN | BTC-USDT | $1.001 0.0002752 Eth | $516,890,503.00 5,359.789 BTC | 0.0000% |
41 | OrangeX | ETH-USDT | $1.002 0.0002755 Eth | $489,774,332.00 141,224.351 ETH | 0.0000% |
42 | Binance | PEPE-USDT | $1.001 0.0002748 Eth | $484,417,691.00 25,626,036,879,288.000 PEPE | 84.5907% |
43 | BigONE | BTC-USDT | $1.002 0.0002753 Eth | $479,572,043.00 4,960.160 BTC | 0.0000% |
44 | LATOKEN | ETH-USDT | $1.002 0.0002755 Eth | $406,592,991.00 112,067.928 ETH | 0.0000% |
45 | OKX | DOGE-USDT | $1.001 0.0002758 Eth | $391,764,011.00 993,223,277.439 DOGE | 0.0033% |
46 | Binance | BNB-USDT | $1.002 0.0002753 Eth | $383,930,702.00 613,017.408 BNB | 0.0000% |
47 | Binance | ADA-USDT | $1.002 0.0002753 Eth | $380,379,516.00 382,932,336.100 ADA | 0.0013% |
48 | Coinstore | BTC-USDT | $1.002 0.0002758 Eth | $367,822,686.00 3,909.425 BTC | 0.0000% |
49 | BTSE | BTC-USDT | $1.001 0.0002749 Eth | $342,014,230.00 3,542.564 BTC | 0.0000% |
50 | Biconomy.com | BTC-USDT | $1.001 0.0002761 Eth | $335,210,056.00 3,557.140 BTC | 0.0000% |
51 | Bitget | XRP-USDT | $1.001 0.0002761 Eth | $292,476,547.00 203,615,038.024 XRP | 0.0007% |
52 | Binance | SUI-USDT | $1.001 0.0002749 Eth | $272,353,674.00 79,997,217.300 SUI | 0.0003% |
53 | KuCoin | BTC-USDT | $1.002 0.0002758 Eth | $270,303,181.00 2,801.763 BTC | 0.0000% |
54 | FameEX | SOL-USDT | $1.001 0.0002747 Eth | $270,089,306.00 1,147,618.341 SOL | 0.0000% |
55 | Bitget | BTC-USDT | $1.001 0.0002761 Eth | $256,285,069.00 2,725.699 BTC | 0.0000% |
56 | FameEX | DOGE-USDT | $1.001 0.0002749 Eth | $230,507,242.00 584,095,047.573 DOGE | 0.0019% |
57 | Gate.io | ETH-USDT | $1.002 0.0002758 Eth | $229,682,408.00 66,034.040 ETH | 0.0000% |
58 | Biconomy.com | ETH-USDT | $1.001 0.0002744 Eth | $228,910,527.00 65,738.015 ETH | 0.0000% |
59 | Kraken | USDT-USD | $1.001 0.0002758 Eth | $228,635,981.00 228,457,783.786 USDT | 0.0008% |
60 | KuCoin | ETH-USDT | $1.002 0.0002758 Eth | $220,029,460.00 60,673.274 ETH | 0.0000% |
61 | Kraken | USDT-EUR | $1.00 0.0002757 Eth | $214,304,070.00 214,225,745.845 USDT | 0.0007% |
62 | WhiteBIT | SOL-USDT | $1.001 0.0002761 Eth | $212,210,852.00 882,687.563 SOL | 0.0000% |
63 | Binance | AVAX-USDT | $1.001 0.0002748 Eth | $211,637,211.00 4,895,764.180 AVAX | 0.0000% |
64 | Bitget | DOGE-USDT | $1.001 0.0002761 Eth | $209,099,008.00 530,752,962.140 DOGE | 0.0018% |
65 | HTX | ETH-USDT | $1.001 0.0002758 Eth | $208,493,081.00 59,851.180 ETH | 0.0000% |
66 | Gate.io | BTC-USDT | $1.002 0.0002758 Eth | $208,213,448.00 2,205.832 BTC | 0.0000% |
67 | CoinW | DOGE-USDT | $1.001 0.0002761 Eth | $206,473,249.00 511,759,668.724 DOGE | 0.0017% |
68 | Binance | FTM-USDT | $1.001 0.0002748 Eth | $204,055,714.00 189,797,584.000 FTM | 0.0006% |
69 | MEXC | DOGE-USDT | $1.001 0.0002761 Eth | $199,593,848.00 494,915,021.570 DOGE | 0.0016% |
70 | OKX | SOL-USDT | $1.001 0.0002759 Eth | $199,017,342.00 843,974.533 SOL | 0.0000% |
71 | HTX | DOGE-USDT | $1.002 0.0002761 Eth | $180,086,071.00 457,276,398.269 DOGE | 0.0015% |
72 | LBank | SOL-USDT | $1.001 0.0002762 Eth | $175,198,039.00 723,047.870 SOL | 0.0000% |
73 | Deepcoin | XRP-USDT | $1.001 0.0002745 Eth | $170,590,624.00 120,109,237.975 XRP | 0.0004% |
74 | Bitget | ETH-USDT | $1.001 0.0002761 Eth | $169,861,144.00 49,017.049 ETH | 0.0000% |
75 | Deepcoin | SOL-USDT | $1.002 0.0002760 Eth | $166,815,101.00 720,376.894 SOL | 0.0000% |
76 | Gate.io | XRP-USDT | $1.002 0.0002758 Eth | $164,236,110.00 113,879,567.223 XRP | 0.0004% |
77 | OKX | XRP-USDT | $1.001 0.0002758 Eth | $159,217,847.00 111,163,088.162 XRP | 0.0004% |
78 | Gate.io | DOGE-USDT | $1.002 0.0002758 Eth | $154,821,667.00 392,056,606.380 DOGE | 0.0013% |
79 | Binance | UNI-USDT | $1.001 0.0002761 Eth | $152,775,345.00 12,362,544.540 UNI | 0.0000% |
80 | WhiteBIT | ADA-USDT | $1.002 0.0002758 Eth | $140,433,929.00 138,872,549.820 ADA | 0.0005% |
81 | Binance | ARB-USDT | $1.001 0.0002748 Eth | $139,626,902.00 153,343,205.800 ARB | 0.0005% |
82 | Bybit | DOGE-USDT | $1.001 0.0002758 Eth | $137,983,931.00 350,412,345.100 DOGE | 0.0012% |
83 | Binance | SEI-USDT | $1.001 0.0002749 Eth | $134,814,550.00 198,890,193.300 SEI | 0.0007% |
84 | Binance | NEIRO-USDT | $1.001 0.0002745 Eth | $134,754,216.00 79,052,509,299.000 NEIRO | 0.2609% |
85 | DigiFinex | DOGE-USDT | $1.001 0.0002761 Eth | $131,210,273.00 327,191,487.900 DOGE | 0.0011% |
86 | Binance | NEAR-USDT | $1.001 0.0002761 Eth | $130,967,437.00 19,717,814.100 NEAR | 0.0001% |
87 | Binance | DOT-USDT | $1.001 0.0002748 Eth | $130,513,994.00 15,791,830.770 DOT | 0.0001% |
88 | Bybit | MNT-USDT | $1.001 0.0002759 Eth | $124,509,169.00 146,829,037.430 MNT | 0.0005% |
89 | WhiteBIT | DOGE-USDT | $1.002 0.0002758 Eth | $123,623,421.00 308,036,813.900 DOGE | 0.0010% |
90 | Bitunix | SOL-USDT | $1.001 0.0002750 Eth | $117,272,887.00 486,030.599 SOL | 0.0000% |
91 | Deepcoin | DOGE-USDT | $1.001 0.0002749 Eth | $107,200,374.00 283,100,927.514 DOGE | 0.0009% |
92 | WhiteBIT | ARB-USDT | $1.002 0.0002755 Eth | $99,688,451.00 106,502,841.282 ARB | 0.0004% |
93 | Bitget | SOL-USDT | $1.001 0.0002761 Eth | $94,236,018.00 400,986.860 SOL | 0.0000% |
94 | BYDFi | BTC-USDT | $1.001 0.0002748 Eth | $87,100,926.00 900.641 BTC | 0.0000% |
95 | OKX | PEPE-USDT | $1.001 0.0002759 Eth | $86,363,550.00 4,575,907,334,827.000 PEPE | 15.1049% |
96 | CoinW | ADA-USDT | $1.002 0.0002755 Eth | $84,914,748.00 84,014,860.044 ADA | 0.0003% |
97 | Binance | LTC-USDT | $1.001 0.0002748 Eth | $75,696,773.00 793,334.371 LTC | 0.0000% |
98 | CoinEx | BTC-USDT | $1.002 0.0002758 Eth | $70,803,914.00 749.635 BTC | 0.0000% |
99 | BingX | BTC-USDT | $1.001 0.0002759 Eth | $69,751,217.00 740.328 BTC | 0.0000% |
100 | Bitget | USDC-USDT | $1.001 0.0002761 Eth | $60,559,838.00 60,497,865.988 USDC | 0.0002% |
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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