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Overview
Max Total Supply
64,929,452,093.657795 USDT
Holders
6,365,094 ( -0.003%)
Market
Price
$1.00 @ 0.000321 ETH (+0.13%)
Onchain Market Cap
$64,885,235,136.78
Circulating Supply Market Cap
$128,064,184,447.00
Other Info
Token Contract (WITH 6 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | BTC-USDT | $1.001 0.0003212 Eth | $3,946,515,069.00 43,151.396 BTC | 0.0000% |
2 | Pionex | BTC-USDT | $1.00 0.0003207 Eth | $2,884,016,773.00 31,565.525 BTC | 0.0000% |
3 | WEEX | BTC-USDT | $1.001 0.0003198 Eth | $2,575,733,662.00 28,217.616 BTC | 0.0000% |
4 | Bybit | BTC-USDT | $1.002 0.0003213 Eth | $2,549,845,492.00 27,877.967 BTC | 0.0000% |
5 | BVOX | BTC-USDT | $1.001 0.0003207 Eth | $2,546,158,452.00 27,847.763 BTC | 0.0000% |
6 | Toobit | BTC-USDT | $1.001 0.0003207 Eth | $2,066,148,898.00 22,605.906 BTC | 0.0000% |
7 | Binance | ETH-USDT | $1.001 0.0003212 Eth | $2,034,011,699.00 645,789.196 ETH | 0.0000% |
8 | BitMart | BTC-USDT | $1.00 0.0003207 Eth | $1,741,512,213.00 18,843.288 BTC | 0.0000% |
9 | OrangeX | BTC-USDT | $1.00 0.0003211 Eth | $1,693,205,927.00 18,556.501 BTC | 0.0000% |
10 | DigiFinex | BTC-USDT | $1.001 0.0003212 Eth | $1,459,261,492.00 15,798.687 BTC | 0.0000% |
11 | Tapbit | ETH-USDT | $1.001 0.0003207 Eth | $1,452,828,259.00 461,234.636 ETH | 0.0000% |
12 | WhiteBIT | BTC-USDT | $0.9999 0.0003207 Eth | $1,429,988,535.00 15,499.751 BTC | 0.0000% |
13 | Toobit | ETH-USDT | $1.001 0.0003189 Eth | $1,343,896,557.00 427,136.808 ETH | 0.0000% |
14 | OKX | BTC-USDT | $1.001 0.0003212 Eth | $1,320,244,615.00 14,428.685 BTC | 0.0000% |
15 | BitMart | ETH-USDT | $1.00 0.0003207 Eth | $1,317,144,222.00 422,655.358 ETH | 0.0000% |
16 | Hotcoin | BTC-USDT | $1.00 0.0003192 Eth | $1,269,069,304.00 13,703.817 BTC | 0.0000% |
17 | P2B | BTC-USDT | $1.00 0.0003207 Eth | $1,166,836,808.00 12,616.403 BTC | 0.0000% |
18 | Binance | USDC-USDT | $1.001 0.0003193 Eth | $1,130,389,132.00 1,130,282,353.000 USDC | 0.0183% |
19 | WEEX | ETH-USDT | $1.001 0.0003203 Eth | $1,078,895,881.00 342,803.390 ETH | 0.0000% |
20 | Binance | FDUSD-USDT | $1.001 0.0003187 Eth | $957,847,557.00 959,340,845.000 FDUSD | 0.0156% |
21 | AscendEX (BitMax) | BTC-USDT | $1.001 0.0003211 Eth | $956,921,916.00 10,360.654 BTC | 0.0000% |
22 | Deepcoin | BTC-USDT | $1.001 0.0003207 Eth | $926,700,473.00 10,137.643 BTC | 0.0000% |
23 | Hotcoin | ETH-USDT | $1.00 0.0003207 Eth | $838,018,247.00 268,910.597 ETH | 0.0000% |
24 | XT.COM | BTC-USDT | $1.001 0.0003205 Eth | $785,473,456.00 8,591.227 BTC | 0.0000% |
25 | Binance | XRP-USDT | $1.001 0.0003212 Eth | $754,550,438.00 673,429,725.000 XRP | 0.0109% |
26 | DigiFinex | ETH-USDT | $1.001 0.0003212 Eth | $696,607,458.00 223,368.353 ETH | 0.0000% |
27 | OKX | DOGE-USDT | $1.001 0.0003211 Eth | $656,027,904.00 1,723,219,539.290 DOGE | 0.0279% |
28 | P2B | ETH-USDT | $1.001 0.0003199 Eth | $638,844,653.00 204,624.717 ETH | 0.0000% |
29 | Hotcoin | DOGE-USDT | $1.00 0.0003207 Eth | $636,346,264.00 1,578,200,888.538 DOGE | 0.0256% |
30 | Ourbit | ETH-USDT | $1.001 0.0003193 Eth | $621,951,568.00 197,647.239 ETH | 0.0000% |
31 | Bybit | ETH-USDT | $1.002 0.0003213 Eth | $611,800,868.00 194,458.671 ETH | 0.0000% |
32 | OKX | ETH-USDT | $1.001 0.0003211 Eth | $608,701,282.00 193,307.756 ETH | 0.0000% |
33 | HTX | BTC-USDT | $1.001 0.0003211 Eth | $596,483,022.00 6,525.995 BTC | 0.0000% |
34 | WhiteBIT | ETH-USDT | $0.9999 0.0003205 Eth | $589,760,267.00 189,141.865 ETH | 0.0000% |
35 | MEXC | ETH-USDT | $1.00 0.0003205 Eth | $581,709,910.00 186,567.029 ETH | 0.0000% |
36 | XT.COM | ETH-USDT | $1.001 0.0003207 Eth | $566,130,427.00 179,846.429 ETH | 0.0000% |
37 | BVOX | ETH-USDT | $1.001 0.0003193 Eth | $555,342,835.00 176,643.277 ETH | 0.0000% |
38 | LATOKEN | BTC-USDT | $1.001 0.0003193 Eth | $539,427,086.00 5,823.164 BTC | 0.0000% |
39 | Binance | HBAR-USDT | $1.001 0.0003191 Eth | $537,005,913.00 3,887,604,226.000 HBAR | 0.0630% |
40 | AscendEX (BitMax) | ETH-USDT | $1.001 0.0003211 Eth | $511,569,580.00 164,227.310 ETH | 0.0000% |
41 | OrangeX | ETH-USDT | $1.001 0.0003189 Eth | $502,789,470.00 159,758.613 ETH | 0.0000% |
42 | BigONE | BTC-USDT | $0.9999 0.0003205 Eth | $470,438,034.00 5,088.363 BTC | 0.0000% |
43 | Binance | PNUT-USDT | $1.001 0.0003212 Eth | $444,562,604.00 272,513,369.000 PNUT | 0.0044% |
44 | Tapbit | BTC-USDT | $1.00 0.0003207 Eth | $441,627,431.00 4,829.999 BTC | 0.0000% |
45 | MEXC | BTC-USDT | $1.00 0.0003205 Eth | $438,395,411.00 4,744.945 BTC | 0.0000% |
46 | BTSE | BTC-USDT | $0.9999 0.0003205 Eth | $435,290,085.00 4,707.458 BTC | 0.0000% |
47 | Azbit | BTC-USDT | $1.001 0.0003207 Eth | $397,818,076.00 4,356.442 BTC | 0.0000% |
48 | LATOKEN | ETH-USDT | $1.00 0.0003205 Eth | $368,326,144.00 118,187.999 ETH | 0.0000% |
49 | Gate.io | BTC-USDT | $1.002 0.0003213 Eth | $367,226,103.00 4,015.192 BTC | 0.0000% |
50 | KuCoin | BTC-USDT | $1.002 0.0003213 Eth | $360,926,477.00 3,903.932 BTC | 0.0000% |
51 | Bitget | DOGE-USDT | $1.002 0.0003213 Eth | $352,625,589.00 929,066,379.328 DOGE | 0.0151% |
52 | Bybit | SOL-USDT | $1.002 0.0003213 Eth | $338,495,251.00 1,402,865.543 SOL | 0.0000% |
53 | Gate.io | ETH-USDT | $1.002 0.0003213 Eth | $309,328,597.00 98,414.049 ETH | 0.0000% |
54 | Bitget | BTC-USDT | $1.002 0.0003213 Eth | $302,461,758.00 3,308.514 BTC | 0.0000% |
55 | Binance | BNB-USDT | $1.001 0.0003191 Eth | $279,697,133.00 451,273.997 BNB | 0.0000% |
56 | CoinW | DOGE-USDT | $1.00 0.0003207 Eth | $268,455,273.00 664,311,760.850 DOGE | 0.0108% |
57 | Binance | BONK-USDT | $1.001 0.0003191 Eth | $268,219,564.00 5,409,010,256,385.000 BONK | 87.6842% |
58 | Bitunix | DOGE-USDT | $1.001 0.0003199 Eth | $266,753,554.00 670,931,522.000 DOGE | 0.0109% |
59 | OKX | SOL-USDT | $1.001 0.0003211 Eth | $263,431,427.00 1,087,917.477 SOL | 0.0000% |
60 | WhiteBIT | SOL-USDT | $0.9999 0.0003207 Eth | $262,275,992.00 1,079,021.448 SOL | 0.0000% |
61 | Bybit | XRP-USDT | $1.002 0.0003213 Eth | $238,550,587.00 212,367,169.020 XRP | 0.0034% |
62 | Bybit | USDC-USDT | $1.002 0.0003213 Eth | $238,522,668.00 238,265,557.000 USDC | 0.0039% |
63 | Binance | SUI-USDT | $1.001 0.0003193 Eth | $233,761,272.00 62,739,473.800 SUI | 0.0010% |
64 | Binance | ADA-USDT | $1.002 0.0003189 Eth | $225,465,420.00 302,523,288.200 ADA | 0.0049% |
65 | DigiFinex | DOGE-USDT | $1.001 0.0003212 Eth | $220,994,286.00 549,434,192.030 DOGE | 0.0089% |
66 | Biconomy.com | ETH-USDT | $1.00 0.0003190 Eth | $219,323,071.00 69,760.726 ETH | 0.0000% |
67 | LBank | ETH-USDT | $1.001 0.0003193 Eth | $218,882,729.00 69,953.402 ETH | 0.0000% |
68 | Coinstore | ETH-USDT | $1.001 0.0003205 Eth | $215,702,596.00 68,455.295 ETH | 0.0000% |
69 | Binance | OM-USDT | $1.001 0.0003193 Eth | $212,519,977.00 52,969,592.000 OM | 0.0009% |
70 | Binance | CATI-USDT | $1.001 0.0003212 Eth | $206,178,752.00 310,429,868.200 CATI | 0.0050% |
71 | WhiteBIT | HBAR-USDT | $0.9999 0.0003207 Eth | $198,720,845.00 1,437,571,253.230 HBAR | 0.0233% |
72 | KuCoin | ETH-USDT | $1.002 0.0003213 Eth | $196,629,301.00 63,011.679 ETH | 0.0000% |
73 | BTSE | ETH-USDT | $1.001 0.0003212 Eth | $194,486,562.00 62,362.968 ETH | 0.0000% |
74 | Gate.io | DOGE-USDT | $1.002 0.0003213 Eth | $188,808,938.00 498,664,465.857 DOGE | 0.0081% |
75 | Coinstore | BTC-USDT | $1.001 0.0003212 Eth | $185,820,855.00 2,029.927 BTC | 0.0000% |
76 | WhiteBIT | XLM-USDT | $0.9999 0.0003207 Eth | $177,472,986.00 775,776,977.200 XLM | 0.0126% |
77 | Bitget | ETH-USDT | $1.002 0.0003213 Eth | $170,078,044.00 53,987.321 ETH | 0.0000% |
78 | WhiteBIT | XRP-USDT | $0.9999 0.0003207 Eth | $167,610,347.00 153,874,652.200 XRP | 0.0025% |
79 | Gate.io | HBAR-USDT | $1.001 0.0003212 Eth | $166,966,073.00 1,224,577,920.750 HBAR | 0.0199% |
80 | Binance | NEIRO-USDT | $1.001 0.0003212 Eth | $165,074,532.00 78,943,137,700.000 NEIRO | 1.2797% |
81 | WEEX | DOGE-USDT | $1.001 0.0003195 Eth | $162,207,619.00 428,656,863.455 DOGE | 0.0069% |
82 | OKX | XRP-USDT | $1.001 0.0003211 Eth | $156,762,580.00 139,646,256.256 XRP | 0.0023% |
83 | Toobit | DOGE-USDT | $1.001 0.0003205 Eth | $154,651,422.00 407,086,503.000 DOGE | 0.0066% |
84 | ProBit Global | BTC-USDT | $1.00 0.0003194 Eth | $153,740,339.00 1,660.577 BTC | 0.0000% |
85 | HTX | ETH-USDT | $0.9999 0.0003207 Eth | $146,481,985.00 46,645.586 ETH | 0.0000% |
86 | Deepcoin | DOGE-USDT | $1.00 0.0003203 Eth | $139,891,084.00 367,965,774.205 DOGE | 0.0060% |
87 | Binance | ACT-USDT | $1.001 0.0003212 Eth | $136,426,186.00 225,098,961.400 ACT | 0.0036% |
88 | WhiteBIT | DOGE-USDT | $1.001 0.0003191 Eth | $135,974,297.00 340,641,936.000 DOGE | 0.0055% |
89 | Gate.io | XRP-USDT | $1.002 0.0003213 Eth | $126,213,469.00 112,354,257.924 XRP | 0.0018% |
90 | Binance | DOGS-USDT | $1.001 0.0003198 Eth | $125,159,956.00 176,509,216,052.000 DOGS | 2.8614% |
91 | Binance | FLOKI-USDT | $1.001 0.0003212 Eth | $121,666,291.00 483,814,191,956.000 FLOKI | 7.8430% |
92 | DigiFinex | SOL-USDT | $1.001 0.0003211 Eth | $113,816,159.00 467,165.310 SOL | 0.0000% |
93 | Binance | LTC-USDT | $1.001 0.0003193 Eth | $111,662,087.00 1,256,672.219 LTC | 0.0000% |
94 | KuCoin | SOL-USDT | $1.002 0.0003213 Eth | $109,950,022.00 450,955.248 SOL | 0.0000% |
95 | Bitget | SOL-USDT | $1.002 0.0003213 Eth | $108,050,112.00 447,063.767 SOL | 0.0000% |
96 | WhiteBIT | PNUT-USDT | $0.9999 0.0003207 Eth | $105,943,715.00 63,456,836.700 PNUT | 0.0010% |
97 | WhiteBIT | LINK-USDT | $0.9999 0.0003207 Eth | $100,169,868.00 6,761,939.040 LINK | 0.0001% |
98 | Slex | BTC-USDT | $1.001 0.0003207 Eth | $97,209,310.00 1,063.794 BTC | 0.0000% |
99 | BYDFi | BTC-USDT | $1.001 0.0003192 Eth | $86,779,248.00 935.203 BTC | 0.0000% |
100 | DigiFinex | USDC-USDT | $1.001 0.0003211 Eth | $48,021,798.00 48,009,785.000 USDC | 0.0008% |
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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