Overview
Max Total Supply
54,940,840,345.993792 USDT
Holders
6,283,268 ( -0.008%)
Market
Price
$1.00 @ 0.000399 ETH (+0.07%)
Onchain Market Cap
$54,905,568,326.49
Circulating Supply Market Cap
$120,486,446,362.00
Other Info
Token Contract (WITH 6 Decimals)
Balance
268 USDTValue
$267.83 ( ~0.106809348993881 Eth) [0.0000%]Loading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | BTC-USDT | $1.00 0.0003990 Eth | $2,339,671,071.00 33,446.278 BTC | 0.0000% |
2 | Hotcoin | BTC-USDT | $0.9997 0.0003992 Eth | $1,940,679,215.00 27,914.387 BTC | 0.0000% |
3 | CoinW | BTC-USDT | $0.9997 0.0003992 Eth | $1,794,505,859.00 25,811.380 BTC | 0.0000% |
4 | Bybit | BTC-USDT | $1.00 0.0003991 Eth | $1,331,212,086.00 19,059.415 BTC | 0.0000% |
5 | Toobit | BTC-USDT | $1.00 0.0003991 Eth | $1,267,369,729.00 18,121.862 BTC | 0.0000% |
6 | Pionex | BTC-USDT | $0.9997 0.0003992 Eth | $1,188,543,599.00 16,992.348 BTC | 0.0000% |
7 | OrangeX | BTC-USDT | $0.9997 0.0003992 Eth | $1,056,274,543.00 15,099.672 BTC | 0.0000% |
8 | DigiFinex | BTC-USDT | $0.9997 0.0003991 Eth | $852,229,487.00 12,254.522 BTC | 0.0000% |
9 | WhiteBIT | BTC-USDT | $0.9997 0.0003992 Eth | $795,647,058.00 11,443.071 BTC | 0.0000% |
10 | BitMart | BTC-USDT | $1.00 0.0003991 Eth | $766,324,155.00 11,021.285 BTC | 0.0000% |
11 | OKX | BTC-USDT | $1.00 0.0003990 Eth | $736,020,936.00 10,513.806 BTC | 0.0000% |
12 | Hotcoin | ETH-USDT | $0.9997 0.0003990 Eth | $618,499,791.00 246,973.110 ETH | 0.0000% |
13 | Binance | SOL-USDT | $1.00 0.0003990 Eth | $487,218,444.00 2,904,914.925 SOL | 0.0002% |
14 | AscendEX (BitMax) | BTC-USDT | $0.9997 0.0003992 Eth | $467,452,288.00 6,724.923 BTC | 0.0000% |
15 | HTX | BTC-USDT | $1.00 0.0003991 Eth | $401,140,505.00 5,743.169 BTC | 0.0000% |
16 | BitMart | ETH-USDT | $1.00 0.0003991 Eth | $387,651,591.00 154,715.112 ETH | 0.0000% |
17 | Bybit | ETH-USDT | $1.00 0.0003991 Eth | $359,371,411.00 142,495.792 ETH | 0.0000% |
18 | DigiFinex | ETH-USDT | $1.00 0.0003990 Eth | $313,827,038.00 125,089.343 ETH | 0.0000% |
19 | OrangeX | ETH-USDT | $0.9997 0.0003992 Eth | $308,255,456.00 122,216.246 ETH | 0.0000% |
20 | MEXC | ETH-USDT | $0.9997 0.0003991 Eth | $285,473,625.00 113,994.577 ETH | 0.0000% |
21 | OKX | ETH-USDT | $0.9997 0.0003992 Eth | $278,509,939.00 110,269.276 ETH | 0.0000% |
22 | BigONE | BTC-USDT | $0.9997 0.0003992 Eth | $275,729,634.00 3,965.731 BTC | 0.0000% |
23 | Tapbit | BTC-USDT | $0.9994 0.0003991 Eth | $275,327,914.00 3,938.804 BTC | 0.0000% |
24 | AscendEX (BitMax) | ETH-USDT | $0.9997 0.0003992 Eth | $256,863,216.00 102,553.540 ETH | 0.0000% |
25 | Bitget | BTC-USDT | $0.9997 0.0003991 Eth | $255,718,602.00 3,666.341 BTC | 0.0000% |
26 | LATOKEN | BTC-USDT | $0.9997 0.0003991 Eth | $251,913,614.00 3,622.361 BTC | 0.0000% |
27 | Gate.io | BTC-USDT | $1.00 0.0003991 Eth | $244,359,064.00 3,490.415 BTC | 0.0000% |
28 | Gate.io | ETH-USDT | $0.9997 0.0003992 Eth | $226,771,276.00 89,808.299 ETH | 0.0000% |
29 | Fastex | BTC-USDT | $0.9996 0.0003989 Eth | $179,680,725.00 2,584.428 BTC | 0.0000% |
30 | Bitunix | ETH-USDT | $0.9994 0.0003989 Eth | $170,595,351.00 68,140.722 ETH | 0.0000% |
31 | KuCoin | BTC-USDT | $0.9997 0.0003992 Eth | $161,925,079.00 2,329.209 BTC | 0.0000% |
32 | Bybit | USDC-USDT | $1.00 0.0003991 Eth | $160,919,680.00 160,823,872.340 USDC | 0.0085% |
33 | Bitget | ETH-USDT | $0.9997 0.0003991 Eth | $154,631,230.00 61,430.805 ETH | 0.0000% |
34 | WhiteBIT | SOL-USDT | $0.9997 0.0003989 Eth | $153,602,108.00 920,542.338 SOL | 0.0000% |
35 | Coinstore | BTC-USDT | $0.9997 0.0003992 Eth | $143,944,900.00 2,060.501 BTC | 0.0000% |
36 | OKX | DOGE-USDT | $0.9997 0.0003992 Eth | $136,604,050.00 847,558,821.010 DOGE | 0.0446% |
37 | Binance | NEIRO-USDT | $0.9997 0.0003992 Eth | $133,490,485.00 89,282,543,765.000 NEIRO | 4.7032% |
38 | KuCoin | ETH-USDT | $0.9997 0.0003992 Eth | $125,725,968.00 50,187.475 ETH | 0.0000% |
39 | LATOKEN | ETH-USDT | $0.9997 0.0003991 Eth | $125,362,985.00 49,988.184 ETH | 0.0000% |
40 | Binance | WIF-USDT | $0.9996 0.0003989 Eth | $125,050,121.00 54,534,475.030 WIF | 0.0029% |
41 | Bybit | SOL-USDT | $1.00 0.0003991 Eth | $124,787,244.00 744,510.188 SOL | 0.0000% |
42 | FameEX | SOL-USDT | $1.00 0.0003991 Eth | $123,550,207.00 736,633.407 SOL | 0.0000% |
43 | OKX | SOL-USDT | $0.9997 0.0003992 Eth | $121,328,051.00 724,496.753 SOL | 0.0000% |
44 | Binance | BNB-USDT | $0.9994 0.0003991 Eth | $120,705,842.00 209,510.217 BNB | 0.0000% |
45 | Bitget | DOGE-USDT | $0.9997 0.0003991 Eth | $99,368,138.00 617,196,366.088 DOGE | 0.0325% |
46 | Bitget | SOL-USDT | $0.9997 0.0003991 Eth | $78,621,900.00 470,226.886 SOL | 0.0000% |
47 | Gate.io | DOGE-USDT | $1.00 0.0003991 Eth | $73,416,857.00 454,141,130.234 DOGE | 0.0239% |
48 | HTX | ETH-USDT | $1.00 0.0003991 Eth | $68,060,561.00 26,930.166 ETH | 0.0000% |
49 | Bybit | MNT-USDT | $1.00 0.0003991 Eth | $67,025,902.00 115,370,572.120 MNT | 0.0061% |
50 | Bybit | DOGE-USDT | $1.00 0.0003991 Eth | $66,473,031.00 412,430,474.200 DOGE | 0.0217% |
51 | Coinbase Exchange | BTC-USDT | $1.00 0.0003990 Eth | $66,371,535.00 954.156 BTC | 0.0000% |
52 | Bitget | BGB-USDT | $0.9997 0.0003991 Eth | $62,556,731.00 55,319,798.103 BGB | 0.0029% |
53 | BingX | BTC-USDT | $1.00 0.0003991 Eth | $59,040,113.00 845.723 BTC | 0.0000% |
54 | Bybit | XRP-USDT | $1.00 0.0003991 Eth | $58,393,434.00 112,981,205.800 XRP | 0.0060% |
55 | Binance | ENA-USDT | $0.9997 0.0003992 Eth | $57,642,503.00 154,966,999.120 ENA | 0.0082% |
56 | HTX | DOGE-USDT | $1.00 0.0003991 Eth | $57,204,605.00 356,454,242.185 DOGE | 0.0188% |
57 | Gate.io | SUI-USDT | $0.9997 0.0003991 Eth | $56,824,486.00 28,488,672.680 SUI | 0.0015% |
58 | CoinEx | BTC-USDT | $0.9997 0.0003989 Eth | $55,198,701.00 789.138 BTC | 0.0000% |
59 | OKX | SUI-USDT | $0.9997 0.0003992 Eth | $54,466,553.00 27,336,131.871 SUI | 0.0014% |
60 | Binance | TIA-USDT | $0.9997 0.0003988 Eth | $54,465,931.00 11,687,560.730 TIA | 0.0006% |
61 | BTSE | SOL-USDT | $0.9997 0.0003992 Eth | $47,934,702.00 287,234.733 SOL | 0.0000% |
62 | Binance | RUNE-USDT | $0.9997 0.0003991 Eth | $46,421,451.00 8,181,536.900 RUNE | 0.0004% |
63 | Bitunix | SOL-USDT | $0.9994 0.0003989 Eth | $44,802,580.00 268,523.900 SOL | 0.0000% |
64 | MEXC | SUI-USDT | $1.00 0.0003991 Eth | $44,498,434.00 22,685,459.520 SUI | 0.0012% |
65 | DigiFinex | DOGE-USDT | $1.00 0.0003990 Eth | $44,061,790.00 272,769,218.030 DOGE | 0.0144% |
66 | Gate.io | KAS-USDT | $0.9997 0.0003991 Eth | $43,720,939.00 373,528,152.540 KAS | 0.0197% |
67 | Binance | TAO-USDT | $0.9996 0.0003984 Eth | $42,938,783.00 92,255.257 TAO | 0.0000% |
68 | Bybit | APEX-USDT | $1.00 0.0003991 Eth | $42,505,171.00 30,763,195.830 APEX | 0.0016% |
69 | Bitunix | DOGE-USDT | $0.9994 0.0003989 Eth | $40,824,215.00 253,439,308.000 DOGE | 0.0134% |
70 | DigiFinex | SOL-USDT | $0.9997 0.0003991 Eth | $39,755,067.00 238,115.630 SOL | 0.0000% |
71 | Binance | NEAR-USDT | $1.00 0.0003990 Eth | $38,841,928.00 9,695,163.900 NEAR | 0.0005% |
72 | Bybit | SUI-USDT | $1.00 0.0003991 Eth | $38,688,372.00 19,448,574.920 SUI | 0.0010% |
73 | Binance | BOME-USDT | $0.9997 0.0003988 Eth | $38,387,673.00 4,808,964,346.000 BOME | 0.2533% |
74 | WhiteBIT | LINK-USDT | $0.9997 0.0003988 Eth | $36,463,763.00 3,232,259.130 LINK | 0.0002% |
75 | BTSE | DOGE-USDT | $0.9997 0.0003991 Eth | $34,766,173.00 215,304,267.832 DOGE | 0.0113% |
76 | MEXC | DOGE-USDT | $1.00 0.0003991 Eth | $34,103,722.00 211,240,422.840 DOGE | 0.0111% |
77 | Azbit | BNB-USDT | $1.00 0.0003991 Eth | $33,052,188.00 57,363.532 BNB | 0.0000% |
78 | Bitunix | USDC-USDT | $0.9994 0.0003989 Eth | $31,844,347.00 31,855,602.582 USDC | 0.0017% |
79 | Binance | UNI-USDT | $1.00 0.0003990 Eth | $31,809,482.00 4,078,689.270 UNI | 0.0002% |
80 | Bybit | STETH-USDT | $1.00 0.0003991 Eth | $31,449,374.00 12,457.068 STETH | 0.0000% |
81 | DigiFinex | SUI-USDT | $0.9997 0.0003991 Eth | $31,034,741.00 15,821,844.100 SUI | 0.0008% |
82 | BingX | ETH-USDT | $1.00 0.0003991 Eth | $30,841,878.00 12,234.036 ETH | 0.0000% |
83 | WEEX | DOGE-USDT | $0.9997 0.0003992 Eth | $29,723,597.00 184,263,783.298 DOGE | 0.0097% |
84 | Gate.io | PEOPLE-USDT | $0.9997 0.0003992 Eth | $29,218,416.00 416,875,088.000 PEOPLE | 0.0220% |
85 | KuCoin | SOL-USDT | $0.9997 0.0003992 Eth | $29,123,388.00 174,450.085 SOL | 0.0000% |
86 | HashKey Global | BTC-USDT | $0.9999 0.0003990 Eth | $29,117,159.00 417.243 BTC | 0.0000% |
87 | WhiteBIT | UNI-USDT | $0.9997 0.0003992 Eth | $28,711,350.00 3,788,803.470 UNI | 0.0002% |
88 | Bitget | TURBO-USDT | $0.9997 0.0003991 Eth | $28,555,398.00 3,358,769,265.000 TURBO | 0.1769% |
89 | FameEX | BNB-USDT | $0.9997 0.0003991 Eth | $26,126,701.00 45,330.791 BNB | 0.0000% |
90 | Gate.io | TURBO-USDT | $0.9997 0.0003991 Eth | $25,396,849.00 2,977,456,131.500 TURBO | 0.1568% |
91 | WhiteBIT | INJ-USDT | $1.00 0.0003991 Eth | $24,590,756.00 1,319,832.205 INJ | 0.0001% |
92 | Gate.io | BOME-USDT | $0.9997 0.0003991 Eth | $23,779,869.00 2,972,711,607.000 BOME | 0.1566% |
93 | XT.COM | DOGE-USDT | $1.00 0.0003990 Eth | $22,632,559.00 140,437,176.000 DOGE | 0.0074% |
94 | Binance | JUP-USDT | $1.00 0.0003990 Eth | $22,354,848.00 23,024,897.700 JUP | 0.0012% |
95 | WhiteBIT | NEIRO-USDT | $1.00 0.0003991 Eth | $18,502,151.00 12,634,757,437.000 NEIRO | 0.6656% |
96 | Phemex | BTC-USDT | $0.9997 0.0003992 Eth | $16,178,872.00 232.594 BTC | 0.0000% |
97 | Gate.io | PEPE-USDT | $0.9997 0.0003991 Eth | $15,992,577.00 1,776,590,807,808.000 PEPE | 93.5869% |
98 | Gate.io | JUP-USDT | $0.9997 0.0003991 Eth | $15,760,475.00 16,274,184.080 JUP | 0.0009% |
99 | Gate.io | DYDX-USDT | $0.9997 0.0003992 Eth | $15,134,201.00 15,064,368.090 DYDX | 0.0008% |
100 | Binance | TUSD-USDT | $0.9997 0.0003991 Eth | $13,937,488.00 13,977,304.000 TUSD | 0.0007% |
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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