Overview
Max Total Supply
54,940,840,345.993792 USDT
Holders
6,288,836 (0.00%)
Market
Price
$1.00 @ 0.000394 ETH (+0.44%)
Onchain Market Cap
$55,160,603,707.38
Circulating Supply Market Cap
$120,878,438,097.00
Other Info
Token Contract (WITH 6 Decimals)
Balance
0.3359 USDTValue
$0.34 ( ~0.000133377004608534 Eth) [0.0000%]Loading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | BTC-USDT | $0.9998 0.0003916 Eth | $3,036,086,005.00 43,415.735 BTC | 0.0000% |
2 | Hotcoin | BTC-USDT | $1.00 0.0003957 Eth | $2,916,257,444.00 40,430.609 BTC | 0.0000% |
3 | WEEX | BTC-USDT | $1.00 0.0003960 Eth | $2,509,148,995.00 34,864.869 BTC | 0.0000% |
4 | CoinW | BTC-USDT | $0.9988 0.0003906 Eth | $2,015,345,950.00 27,712.043 BTC | 0.0000% |
5 | Bybit | BTC-USDT | $1.00 0.0003916 Eth | $1,853,329,933.00 26,564.456 BTC | 0.0000% |
6 | Ourbit | BTC-USDT | $0.9988 0.0003906 Eth | $1,516,253,684.00 21,708.433 BTC | 0.0000% |
7 | BitMart | BTC-USDT | $0.9991 0.0003906 Eth | $1,313,133,919.00 18,066.017 BTC | 0.0000% |
8 | BVOX | BTC-USDT | $0.9999 0.0003906 Eth | $1,300,593,780.00 18,750.078 BTC | 0.0000% |
9 | MEXC | BTC-USDT | $0.9997 0.0003910 Eth | $1,239,898,510.00 17,039.572 BTC | 0.0000% |
10 | DigiFinex | BTC-USDT | $1.00 0.0003916 Eth | $1,132,800,084.00 15,592.654 BTC | 0.0000% |
11 | Binance | USDC-USDT | $1.00 0.0003938 Eth | $1,062,022,635.00 1,061,643,236.000 USDC | 0.0162% |
12 | Binance | ETH-USDT | $0.9999 0.0003906 Eth | $1,040,135,713.00 423,264.451 ETH | 0.0000% |
13 | OKX | BTC-USDT | $0.9998 0.0003916 Eth | $1,012,922,761.00 14,476.155 BTC | 0.0000% |
14 | P2B | BTC-USDT | $1.00 0.0003909 Eth | $994,080,364.00 13,658.005 BTC | 0.0000% |
15 | Hotcoin | ETH-USDT | $1.00 0.0003957 Eth | $856,268,243.00 338,128.657 ETH | 0.0000% |
16 | Bitunix | BTC-USDT | $0.9999 0.0003916 Eth | $850,708,418.00 11,719.658 BTC | 0.0000% |
17 | Binance | DOGE-USDT | $1.002 0.0003956 Eth | $804,945,501.00 4,627,557,563.000 DOGE | 0.0706% |
18 | Tapbit | ETH-USDT | $0.9995 0.0003945 Eth | $710,127,706.00 289,752.517 ETH | 0.0000% |
19 | Binance | SOL-USDT | $1.00 0.0003916 Eth | $710,030,774.00 4,250,311.587 SOL | 0.0001% |
20 | BitMart | ETH-USDT | $0.9991 0.0003906 Eth | $660,181,638.00 258,574.143 ETH | 0.0000% |
21 | XT.COM | BTC-USDT | $1.00 0.0003916 Eth | $622,619,657.00 8,900.132 BTC | 0.0000% |
22 | Bybit | ETH-USDT | $1.00 0.0003916 Eth | $555,833,784.00 226,555.518 ETH | 0.0000% |
23 | Gate.io | ETH-USDT | $0.9999 0.0003906 Eth | $537,700,531.00 218,255.317 ETH | 0.0000% |
24 | Gate.io | BTC-USDT | $0.9999 0.0003906 Eth | $494,791,579.00 7,055.767 BTC | 0.0000% |
25 | AscendEX (BitMax) | BTC-USDT | $0.9999 0.0003906 Eth | $491,958,486.00 6,768.003 BTC | 0.0000% |
26 | BVOX | ETH-USDT | $0.9999 0.0003906 Eth | $481,334,901.00 196,941.708 ETH | 0.0000% |
27 | HTX | BTC-USDT | $1.00 0.0003916 Eth | $458,749,265.00 6,568.077 BTC | 0.0000% |
28 | OKX | DOGE-USDT | $0.9986 0.0003907 Eth | $411,515,524.00 2,349,403,000.745 DOGE | 0.0359% |
29 | DigiFinex | ETH-USDT | $1.00 0.0003916 Eth | $382,863,906.00 149,949.953 ETH | 0.0000% |
30 | OrangeX | ETH-USDT | $1.00 0.0003919 Eth | $362,449,051.00 147,812.436 ETH | 0.0000% |
31 | WhiteBIT | ETH-USDT | $0.9991 0.0003906 Eth | $354,725,026.00 138,737.971 ETH | 0.0000% |
32 | P2B | ETH-USDT | $1.00 0.0003909 Eth | $353,921,909.00 138,413.227 ETH | 0.0000% |
33 | Binance | FDUSD-USDT | $1.00 0.0003947 Eth | $349,534,646.00 349,698,083.000 FDUSD | 0.0053% |
34 | OKX | ETH-USDT | $0.9999 0.0003916 Eth | $341,675,127.00 138,669.654 ETH | 0.0000% |
35 | CoinW | ETH-USDT | $0.9988 0.0003906 Eth | $337,682,023.00 132,095.025 ETH | 0.0000% |
36 | Hotcoin | DOGE-USDT | $1.001 0.0003919 Eth | $316,678,661.00 1,652,201,920.457 DOGE | 0.0252% |
37 | Bitget | BTC-USDT | $0.9999 0.0003916 Eth | $315,662,105.00 4,535.415 BTC | 0.0000% |
38 | Coinbase Exchange | USDT-USD | $1.00 0.0003916 Eth | $302,176,834.00 302,158,704.340 USDT | 0.0046% |
39 | Bitunix | ETH-USDT | $0.9999 0.0003916 Eth | $286,983,163.00 112,493.069 ETH | 0.0000% |
40 | AscendEX (BitMax) | ETH-USDT | $0.9999 0.0003906 Eth | $270,762,923.00 105,912.551 ETH | 0.0000% |
41 | Biconomy.com | BTC-USDT | $0.9991 0.0003906 Eth | $263,193,931.00 3,779.227 BTC | 0.0000% |
42 | KuCoin | BTC-USDT | $0.9999 0.0003916 Eth | $249,906,718.00 3,442.933 BTC | 0.0000% |
43 | Gate.io | DOGE-USDT | $0.9999 0.0003906 Eth | $245,399,701.00 1,402,396,465.990 DOGE | 0.0214% |
44 | Bybit | USDC-USDT | $0.9999 0.0003916 Eth | $224,155,734.00 224,132,191.890 USDC | 0.0034% |
45 | BTSE | BTC-USDT | $0.9986 0.0003907 Eth | $216,819,209.00 2,988.150 BTC | 0.0000% |
46 | Ourbit | ETH-USDT | $1.001 0.0003917 Eth | $202,369,308.00 82,394.071 ETH | 0.0000% |
47 | Fastex | BTC-USDT | $0.9988 0.0003906 Eth | $189,914,785.00 2,611.295 BTC | 0.0000% |
48 | LBank | ETH-USDT | $0.9986 0.0003907 Eth | $184,810,269.00 72,433.316 ETH | 0.0000% |
49 | Bybit | SOL-USDT | $0.9999 0.0003916 Eth | $175,651,247.00 1,050,657.388 SOL | 0.0000% |
50 | Bitget | DOGE-USDT | $0.9999 0.0003916 Eth | $170,277,412.00 981,612,912.479 DOGE | 0.0150% |
51 | FameEX | SOL-USDT | $0.9995 0.0003966 Eth | $168,554,109.00 1,014,790.599 SOL | 0.0000% |
52 | Bybit | DOGE-USDT | $0.9999 0.0003916 Eth | $167,510,834.00 960,643,294.400 DOGE | 0.0147% |
53 | FameEX | USDC-USDT | $0.9991 0.0003906 Eth | $160,390,019.00 160,519,022.850 USDC | 0.0025% |
54 | OKX | SOL-USDT | $0.9986 0.0003907 Eth | $160,153,411.00 956,198.635 SOL | 0.0000% |
55 | KuCoin | ETH-USDT | $0.9999 0.0003916 Eth | $156,411,365.00 61,309.212 ETH | 0.0000% |
56 | Binance | NEIRO-USDT | $0.9999 0.0003962 Eth | $152,317,588.00 112,260,155,894.000 NEIRO | 1.7137% |
57 | ProBit Global | BTC-USDT | $0.9985 0.0003908 Eth | $151,730,955.00 2,090.955 BTC | 0.0000% |
58 | Bitget | ETH-USDT | $0.9999 0.0003916 Eth | $143,329,637.00 58,460.506 ETH | 0.0000% |
59 | DigiFinex | DOGE-USDT | $1.00 0.0003916 Eth | $142,858,176.00 752,817,939.030 DOGE | 0.0115% |
60 | Binance | BNB-USDT | $1.00 0.0003916 Eth | $138,656,135.00 245,106.223 BNB | 0.0000% |
61 | Bitunix | DOGE-USDT | $0.9999 0.0003916 Eth | $137,592,494.00 725,974,448.000 DOGE | 0.0111% |
62 | Binance | WIF-USDT | $0.9996 0.0003963 Eth | $136,829,300.00 64,814,855.190 WIF | 0.0010% |
63 | Biconomy.com | ETH-USDT | $0.9991 0.0003906 Eth | $136,566,826.00 55,784.377 ETH | 0.0000% |
64 | Coinstore | BTC-USDT | $0.9991 0.0003906 Eth | $135,993,364.00 1,960.745 BTC | 0.0000% |
65 | Coinstore | ETH-USDT | $0.9991 0.0003906 Eth | $132,806,893.00 54,251.446 ETH | 0.0000% |
66 | FameEX | DOGE-USDT | $0.9991 0.0003906 Eth | $127,478,455.00 732,203,894.600 DOGE | 0.0112% |
67 | LBank | SOL-USDT | $0.9991 0.0003906 Eth | $107,326,850.00 599,252.974 SOL | 0.0000% |
68 | Binance | XRP-USDT | $0.9994 0.0003962 Eth | $106,807,428.00 208,489,790.000 XRP | 0.0032% |
69 | HTX | ETH-USDT | $1.00 0.0003916 Eth | $90,368,436.00 36,746.791 ETH | 0.0000% |
70 | Bitget | SOL-USDT | $0.9999 0.0003916 Eth | $87,855,610.00 530,670.193 SOL | 0.0000% |
71 | Bitunix | SOL-USDT | $0.9999 0.0003916 Eth | $83,074,027.00 466,868.680 SOL | 0.0000% |
72 | BTSE | ETH-USDT | $0.9994 0.0003945 Eth | $80,608,122.00 31,820.758 ETH | 0.0000% |
73 | Gate.io | SUI-USDT | $0.9998 0.0003905 Eth | $79,502,987.00 39,644,820.070 SUI | 0.0006% |
74 | Binance | RUNE-USDT | $1.00 0.0003916 Eth | $78,653,542.00 16,953,821.100 RUNE | 0.0003% |
75 | Bybit | MNT-USDT | $0.9999 0.0003916 Eth | $70,799,540.00 125,834,413.980 MNT | 0.0019% |
76 | MEXC | DOGE-USDT | $0.9997 0.0003910 Eth | $69,194,599.00 363,734,779.160 DOGE | 0.0056% |
77 | OKX | SUI-USDT | $0.9986 0.0003907 Eth | $65,361,773.00 32,493,757.570 SUI | 0.0005% |
78 | DigiFinex | SOL-USDT | $1.00 0.0003916 Eth | $60,480,507.00 339,283.790 SOL | 0.0000% |
79 | Bybit | XRP-USDT | $1.00 0.0003916 Eth | $59,975,707.00 116,773,468.310 XRP | 0.0018% |
80 | Bitget | BGB-USDT | $0.9999 0.0003916 Eth | $59,857,838.00 52,328,541.605 BGB | 0.0008% |
81 | Coinbase Exchange | USDT-USDC | $0.9998 0.0003905 Eth | $56,290,368.00 56,299,818.920 USDT | 0.0009% |
82 | Gate.io | PEPE-USDT | $0.9999 0.0003906 Eth | $54,959,733.00 6,411,630,836,193.000 PEPE | 97.8772% |
83 | Gate.io | SOL-USDT | $0.9999 0.0003906 Eth | $53,696,678.00 319,704.825 SOL | 0.0000% |
84 | Binance | BOME-USDT | $0.9999 0.0003963 Eth | $53,059,553.00 7,009,834,442.000 BOME | 0.1070% |
85 | Gate.io | PEOPLE-USDT | $0.9998 0.0003916 Eth | $52,356,075.00 797,433,831.700 PEOPLE | 0.0122% |
86 | BVOX | DOGE-USDT | $0.9999 0.0003909 Eth | $48,914,481.00 286,800,717.000 DOGE | 0.0044% |
87 | BingX | BTC-USDT | $0.9999 0.0003916 Eth | $47,670,444.00 685.407 BTC | 0.0000% |
88 | Azbit | BNB-USDT | $0.9991 0.0003906 Eth | $46,165,574.00 82,090.471 BNB | 0.0000% |
89 | BTSE | USDT-USD | $1.00 0.0003910 Eth | $44,153,064.00 44,153,064.171 USDT | 0.0007% |
90 | Deepcoin | DOGE-USDT | $1.00 0.0003916 Eth | $42,510,143.00 225,921,405.269 DOGE | 0.0034% |
91 | Deepcoin | USDC-USDT | $0.9983 0.0003919 Eth | $41,919,622.00 40,232,572.683 USDC | 0.0006% |
92 | Bitunix | USDC-USDT | $0.9999 0.0003916 Eth | $40,140,845.00 40,151,414.095 USDC | 0.0006% |
93 | WhiteBIT | LINK-USDT | $1.00 0.0003905 Eth | $38,456,725.00 3,356,157.140 LINK | 0.0001% |
94 | Binance | PEOPLE-USDT | $1.00 0.0003916 Eth | $37,597,184.00 581,001,084.400 PEOPLE | 0.0089% |
95 | PointPay | BTC-USDT | $1.00 0.0003916 Eth | $37,072,724.00 530.052 BTC | 0.0000% |
96 | Bitunix | SUI-USDT | $0.9999 0.0003916 Eth | $36,083,229.00 16,655,364.000 SUI | 0.0003% |
97 | BVOX | SOL-USDT | $0.9991 0.0003906 Eth | $36,030,344.00 219,715.390 SOL | 0.0000% |
98 | Azbit | TRX-USDT | $0.9989 0.0003907 Eth | $34,055,352.00 211,148,280.200 TRX | 0.0032% |
99 | BYDFi | DOGE-USDT | $0.9997 0.0003910 Eth | $31,701,989.00 166,385,333.000 DOGE | 0.0025% |
100 | BingX | ETH-USDT | $0.9999 0.0003916 Eth | $24,742,270.00 10,105.251 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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