Feature Tip: Add private address tag to any address under My Name Tag !
Overview
Max Total Supply
76,926,220,145.483487 USDT
Holders
6,548,366 ( -0.037%)
Market
Price
$1.00 @ 0.000299 ETH (-0.14%)
Onchain Market Cap
$76,817,984,953.74
Circulating Supply Market Cap
$139,259,900,549.00
Other Info
Token Contract (WITH 6 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | OrangeX | BTC-USDT | $0.9984 0.0002990 Eth | $2,774,033,185.00 29,068.270 BTC | 0.0003% |
2 | Bybit | BTC-USDT | $0.9984 0.0002985 Eth | $2,515,170,855.00 26,291.440 BTC | 0.0003% |
3 | Binance | BTC-USDT | $0.9986 0.0002985 Eth | $2,489,823,847.00 26,088.678 BTC | 0.0003% |
4 | FameEX | BTC-USDT | $0.9986 0.0002985 Eth | $2,037,269,091.00 21,345.680 BTC | 0.0002% |
5 | BVOX | BTC-USDT | $0.9984 0.0002991 Eth | $1,887,680,517.00 19,779.927 BTC | 0.0002% |
6 | Pionex | BTC-USDT | $0.9993 0.0002989 Eth | $1,825,252,678.00 19,113.533 BTC | 0.0002% |
7 | Ourbit | BTC-USDT | $0.9985 0.0002991 Eth | $1,473,028,097.00 15,435.381 BTC | 0.0002% |
8 | WhiteBIT | BTC-USDT | $0.9984 0.0002985 Eth | $1,409,473,115.00 14,964.683 BTC | 0.0002% |
9 | Toobit | BTC-USDT | $0.9993 0.0002989 Eth | $1,405,431,954.00 14,712.913 BTC | 0.0002% |
10 | Binance | ETH-USDT | $0.9986 0.0002985 Eth | $1,227,989,689.00 365,875.429 ETH | 0.0040% |
11 | Binance | USDC-USDT | $0.9986 0.0002985 Eth | $1,190,712,474.00 1,190,868,826.000 USDC | 12.9908% |
12 | MEXC | BTC-USDT | $0.9984 0.0002992 Eth | $1,136,494,118.00 12,084.825 BTC | 0.0001% |
13 | BitMart | BTC-USDT | $0.9984 0.0002985 Eth | $936,855,376.00 9,951.906 BTC | 0.0001% |
14 | AscendEX (BitMax) | BTC-USDT | $0.9986 0.0002985 Eth | $926,042,756.00 9,833.317 BTC | 0.0001% |
15 | FameEX | ETH-USDT | $0.9986 0.0002985 Eth | $921,559,464.00 274,558.872 ETH | 0.0030% |
16 | Pionex | ETH-USDT | $0.9986 0.0002985 Eth | $905,330,733.00 269,903.708 ETH | 0.0029% |
17 | Tapbit | ETH-USDT | $0.9984 0.0002985 Eth | $893,656,241.00 266,307.686 ETH | 0.0029% |
18 | CoinW | BTC-USDT | $0.9984 0.0002990 Eth | $826,845,420.00 8,789.331 BTC | 0.0001% |
19 | Toobit | ETH-USDT | $0.9983 0.0002990 Eth | $814,663,656.00 242,807.295 ETH | 0.0026% |
20 | OKX | BTC-USDT | $0.9986 0.0002985 Eth | $781,344,118.00 8,186.558 BTC | 0.0001% |
21 | WEEX | ETH-USDT | $0.9984 0.0002990 Eth | $700,046,072.00 208,733.142 ETH | 0.0023% |
22 | Bitget | BTC-USDT | $0.9986 0.0002985 Eth | $696,298,090.00 7,294.968 BTC | 0.0001% |
23 | Bybit | ETH-USDT | $0.9984 0.0002985 Eth | $677,450,055.00 202,032.839 ETH | 0.0022% |
24 | Binance | FDUSD-USDT | $0.9986 0.0002985 Eth | $654,388,543.00 654,309,835.000 FDUSD | 7.1376% |
25 | DigiFinex | BTC-USDT | $0.9986 0.0002985 Eth | $607,148,006.00 6,445.182 BTC | 0.0001% |
26 | Coinbase Exchange | USDT-USD | $0.9986 0.0002985 Eth | $604,641,551.00 605,489,235.540 USDT | 6.6051% |
27 | WhiteBIT | ETH-USDT | $0.9986 0.0002991 Eth | $585,002,578.00 174,977.455 ETH | 0.0019% |
28 | Binance | XRP-USDT | $0.9983 0.0002989 Eth | $583,151,923.00 269,129,435.000 XRP | 2.9358% |
29 | BVOX | ETH-USDT | $0.9984 0.0002990 Eth | $559,323,638.00 166,720.603 ETH | 0.0018% |
30 | P2B | BTC-USDT | $0.9984 0.0002990 Eth | $558,979,190.00 5,941.683 BTC | 0.0001% |
31 | Bitget | ETH-USDT | $0.9986 0.0002985 Eth | $555,249,951.00 165,512.728 ETH | 0.0018% |
32 | Hotcoin | BTC-USDT | $0.9988 0.0003001 Eth | $532,326,372.00 5,668.664 BTC | 0.0001% |
33 | AscendEX (BitMax) | ETH-USDT | $0.9986 0.0002985 Eth | $512,419,527.00 153,011.390 ETH | 0.0017% |
34 | OKX | ETH-USDT | $0.9986 0.0002985 Eth | $485,315,847.00 144,701.009 ETH | 0.0016% |
35 | Ourbit | ETH-USDT | $0.9984 0.0002986 Eth | $476,624,976.00 142,131.527 ETH | 0.0016% |
36 | LBank | BTC-USDT | $0.9985 0.0002990 Eth | $468,785,058.00 4,982.289 BTC | 0.0001% |
37 | BitMart | ETH-USDT | $0.9984 0.0002985 Eth | $462,079,897.00 138,136.990 ETH | 0.0015% |
38 | HTX | BTC-USDT | $0.9986 0.0002985 Eth | $443,941,588.00 4,650.369 BTC | 0.0001% |
39 | Binance | SOL-USDT | $0.9983 0.0002989 Eth | $379,273,918.00 2,012,728.474 SOL | 0.0220% |
40 | Deepcoin | ETH-USDT | $0.9985 0.0002985 Eth | $354,352,497.00 108,582.573 ETH | 0.0012% |
41 | Gate.io | BTC-USDT | $0.9984 0.0002985 Eth | $350,663,255.00 3,673.139 BTC | 0.0000% |
42 | Binance | DOGE-USDT | $0.9983 0.0002990 Eth | $344,420,332.00 1,094,798,900.000 DOGE | 11.9428% |
43 | Tapbit | BTC-USDT | $0.9984 0.0002985 Eth | $286,741,912.00 3,004.523 BTC | 0.0000% |
44 | BigONE | BTC-USDT | $0.9978 0.0002989 Eth | $280,435,377.00 2,985.311 BTC | 0.0000% |
45 | Bybit | USDC-USDT | $0.9984 0.0002985 Eth | $270,289,399.00 270,368,795.260 USDC | 2.9494% |
46 | BTSE | BTC-USDT | $0.9984 0.0002990 Eth | $268,533,076.00 2,854.126 BTC | 0.0000% |
47 | Binance | BNB-USDT | $0.9983 0.0002989 Eth | $251,759,620.00 362,945.310 BNB | 0.0040% |
48 | Binance | TRX-USDT | $0.9985 0.0002993 Eth | $249,122,974.00 964,533,368.500 TRX | 10.5218% |
49 | Biconomy.com | BTC-USDT | $0.9983 0.0002989 Eth | $237,851,218.00 2,489.448 BTC | 0.0000% |
50 | Bybit | XRP-USDT | $0.9984 0.0002985 Eth | $233,246,077.00 107,646,449.240 XRP | 1.1743% |
51 | Binance | USUAL-USDT | $0.9983 0.0002989 Eth | $223,670,416.00 189,102,311.300 USUAL | 2.0629% |
52 | Binance | SUI-USDT | $0.9986 0.0002985 Eth | $217,744,127.00 51,512,216.900 SUI | 0.5619% |
53 | Gate.io | ETH-USDT | $0.9984 0.0002985 Eth | $216,915,532.00 64,659.763 ETH | 0.0007% |
54 | WEEX | XRP-USDT | $0.9985 0.0002991 Eth | $213,096,757.00 98,315,353.346 XRP | 1.0725% |
55 | XT.COM | ETH-USDT | $0.9985 0.0002989 Eth | $195,417,363.00 58,231.854 ETH | 0.0006% |
56 | DigiFinex | ETH-USDT | $0.9986 0.0002985 Eth | $194,191,236.00 58,047.189 ETH | 0.0006% |
57 | LBank | ETH-USDT | $0.9986 0.0002985 Eth | $184,520,962.00 55,087.512 ETH | 0.0006% |
58 | KuCoin | ETH-USDT | $0.9986 0.0002985 Eth | $182,837,215.00 54,596.722 ETH | 0.0006% |
59 | Kraken | USDT-USD | $0.9986 0.0002985 Eth | $180,365,051.00 180,614,298.549 USDT | 1.9703% |
60 | KuCoin | BTC-USDT | $0.9986 0.0002985 Eth | $180,263,251.00 1,914.237 BTC | 0.0000% |
61 | Bybit | SOL-USDT | $0.9984 0.0002985 Eth | $175,857,735.00 933,475.303 SOL | 0.0102% |
62 | OKX | DOGE-USDT | $0.9986 0.0002985 Eth | $171,116,975.00 542,979,111.688 DOGE | 5.9232% |
63 | Coinstore | ETH-USDT | $0.9985 0.0002990 Eth | $169,400,010.00 50,518.424 ETH | 0.0006% |
64 | Bitget | XRP-USDT | $0.9986 0.0002985 Eth | $162,939,882.00 75,178,871.258 XRP | 0.8201% |
65 | WhiteBIT | SOL-USDT | $0.9985 0.0002990 Eth | $156,389,334.00 840,411.424 SOL | 0.0092% |
66 | Hotcoin | ETH-USDT | $0.9984 0.0002985 Eth | $156,133,159.00 46,679.869 ETH | 0.0005% |
67 | WhiteBIT | XRP-USDT | $0.9982 0.0002999 Eth | $150,486,436.00 69,683,677.190 XRP | 0.7602% |
68 | Coinstore | BTC-USDT | $0.9985 0.0002990 Eth | $150,191,193.00 1,571.497 BTC | 0.0000% |
69 | Binance | HBAR-USDT | $0.9986 0.0002985 Eth | $146,288,193.00 512,469,037.000 HBAR | 5.5904% |
70 | Binance | PENGU-USDT | $0.9986 0.0002985 Eth | $136,855,743.00 3,785,914,723.000 PENGU | 41.2993% |
71 | Biconomy.com | ETH-USDT | $0.9986 0.0002991 Eth | $135,574,023.00 40,407.886 ETH | 0.0004% |
72 | LBank | SOL-USDT | $0.9986 0.0002985 Eth | $135,459,079.00 728,300.854 SOL | 0.0079% |
73 | Bybit | MNT-USDT | $0.9984 0.0002985 Eth | $130,595,311.00 109,484,650.970 MNT | 1.1943% |
74 | Hibt | BTC-USDT | $0.9982 0.0003001 Eth | $122,964,722.00 1,288.528 BTC | 0.0000% |
75 | WhiteBIT | SUI-USDT | $0.9986 0.0002985 Eth | $121,661,230.00 28,860,756.299 SUI | 0.3148% |
76 | Binance | ADA-USDT | $0.9986 0.0002985 Eth | $120,686,786.00 137,448,024.900 ADA | 1.4994% |
77 | DigiFinex | TRX-USDT | $0.9986 0.0002985 Eth | $111,206,115.00 427,521,779.400 TRX | 4.6637% |
78 | WhiteBIT | DOGE-USDT | $0.9985 0.0002990 Eth | $107,593,667.00 342,286,238.900 DOGE | 3.7339% |
79 | Binance | MOVE-USDT | $0.9983 0.0002989 Eth | $104,916,256.00 99,824,793.100 MOVE | 1.0890% |
80 | HTX | DOGE-USDT | $0.9986 0.0002985 Eth | $103,731,859.00 330,082,591.195 DOGE | 3.6008% |
81 | OKX | SOL-USDT | $0.9986 0.0002985 Eth | $102,891,010.00 546,254.031 SOL | 0.0060% |
82 | Binance | THE-USDT | $0.9983 0.0002990 Eth | $98,574,481.00 66,127,398.800 THE | 0.7214% |
83 | Binance | ENA-USDT | $0.9986 0.0002985 Eth | $97,613,875.00 103,358,181.380 ENA | 1.1275% |
84 | WEEX | SOL-USDT | $0.9985 0.0002991 Eth | $97,002,926.00 515,105.802 SOL | 0.0056% |
85 | Binance | AAVE-USDT | $0.9983 0.0002989 Eth | $95,876,532.00 285,543.257 AAVE | 0.0031% |
86 | HTX | ETH-USDT | $0.9986 0.0002985 Eth | $90,794,747.00 27,080.709 ETH | 0.0003% |
87 | Bitget | DOGE-USDT | $0.9986 0.0002985 Eth | $86,936,133.00 276,383,284.963 DOGE | 3.0150% |
88 | LBank | DOGE-USDT | $0.9986 0.0002985 Eth | $86,686,383.00 276,168,112.000 DOGE | 3.0126% |
89 | Bitget | SOL-USDT | $0.9986 0.0002985 Eth | $85,884,959.00 454,951.665 SOL | 0.0050% |
90 | Gate.io | XRP-USDT | $0.9984 0.0002985 Eth | $82,472,337.00 38,013,835.602 XRP | 0.4147% |
91 | Azbit | BTC-USDT | $0.9983 0.0002990 Eth | $74,244,340.00 778.012 BTC | 0.0000% |
92 | KuCoin | XRP-USDT | $0.9986 0.0002985 Eth | $70,846,949.00 32,769,325.350 XRP | 0.3575% |
93 | WhiteBIT | HBAR-USDT | $0.9983 0.0002989 Eth | $70,762,419.00 252,465,174.980 HBAR | 2.7541% |
94 | BingX | BTC-USDT | $0.9984 0.0002985 Eth | $69,508,120.00 726.086 BTC | 0.0000% |
95 | OKX | XRP-USDT | $0.9986 0.0002985 Eth | $69,128,449.00 31,928,646.525 XRP | 0.3483% |
96 | Gate.io | DOGE-USDT | $0.9984 0.0002985 Eth | $65,334,379.00 207,260,426.820 DOGE | 2.2609% |
97 | Hibt | ETH-USDT | $0.9985 0.0002991 Eth | $62,997,696.00 18,784.153 ETH | 0.0002% |
98 | Binance | FTM-USDT | $0.9982 0.0002989 Eth | $62,049,322.00 70,587,587.000 FTM | 0.7700% |
99 | CoinEx | BTC-USDT | $0.9983 0.0002990 Eth | $54,820,189.00 574.037 BTC | 0.0000% |
100 | BingX | ETH-USDT | $0.9984 0.0002985 Eth | $50,506,971.00 15,060.157 ETH | 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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