Overview
Max Total Supply
76,928,104,353.364467 USDT
Holders
6,554,610 ( 0.028%)
Market
Price
$1.00 @ 0.000254 ETH (+0.05%)
Onchain Market Cap
$77,005,032,457.72
Circulating Supply Market Cap
$140,260,887,977.00
Other Info
Token Contract (WITH 6 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | BTC-USDT | $0.9994 0.0002533 Eth | $2,156,348,735.00 20,965.490 BTC | 0.0000% |
2 | Bybit | BTC-USDT | $0.9999 0.0002533 Eth | $1,768,568,670.00 17,237.037 BTC | 0.0000% |
3 | AscendEX (BitMax) | BTC-USDT | $0.9994 0.0002533 Eth | $963,037,226.00 9,174.632 BTC | 0.0000% |
4 | OKX | BTC-USDT | $0.9999 0.0002533 Eth | $612,686,856.00 5,952.546 BTC | 0.0000% |
5 | Toobit | ETH-USDT | $0.9999 0.0002534 Eth | $612,680,020.00 157,680.268 ETH | 0.0000% |
6 | Bybit | ETH-USDT | $0.9999 0.0002533 Eth | $581,601,719.00 149,782.982 ETH | 0.0000% |
7 | Bitget | BTC-USDT | $1.00 0.0002534 Eth | $575,419,470.00 5,605.184 BTC | 0.0000% |
8 | AscendEX (BitMax) | ETH-USDT | $0.9994 0.0002533 Eth | $520,934,957.00 132,051.944 ETH | 0.0000% |
9 | Bitget | ETH-USDT | $1.00 0.0002534 Eth | $496,479,767.00 127,879.289 ETH | 0.0000% |
10 | Hotcoin | BTC-USDT | $0.9994 0.0002533 Eth | $445,803,774.00 4,245.356 BTC | 0.0000% |
11 | Binance | SOL-USDT | $1.004 0.0002552 Eth | $438,289,422.00 1,986,237.164 SOL | 0.0000% |
12 | OKX | ETH-USDT | $0.9994 0.0002533 Eth | $384,997,773.00 99,177.834 ETH | 0.0000% |
13 | Binance | ENA-USDT | $0.9999 0.0002533 Eth | $274,775,618.00 234,479,158.640 ENA | 0.0023% |
14 | Gate.io | BTC-USDT | $0.9994 0.0002533 Eth | $255,075,545.00 2,483.487 BTC | 0.0000% |
15 | KuCoin | XRP-USDT | $0.9999 0.0002533 Eth | $250,866,458.00 102,788,069.053 XRP | 0.0010% |
16 | Binance | SUI-USDT | $1.00 0.0002554 Eth | $247,495,793.00 54,022,188.100 SUI | 0.0005% |
17 | HTX | BTC-USDT | $0.9994 0.0002533 Eth | $242,413,183.00 2,359.786 BTC | 0.0000% |
18 | LATOKEN | BTC-USDT | $0.9999 0.0002533 Eth | $233,107,963.00 2,225.081 BTC | 0.0000% |
19 | BTSE | BTC-USDT | $0.9999 0.0002534 Eth | $222,128,183.00 2,114.075 BTC | 0.0000% |
20 | OKX | DOGE-USDT | $0.9994 0.0002533 Eth | $202,651,498.00 506,711,084.985 DOGE | 0.0050% |
21 | Binance | LINK-USDT | $0.9999 0.0002533 Eth | $201,816,824.00 6,969,850.480 LINK | 0.0001% |
22 | Binance | BNB-USDT | $1.001 0.0002537 Eth | $182,755,417.00 255,622.782 BNB | 0.0000% |
23 | KuCoin | BTC-USDT | $0.9999 0.0002533 Eth | $180,785,163.00 1,725.230 BTC | 0.0000% |
24 | Binance | FLOKI-USDT | $0.9999 0.0002533 Eth | $168,657,851.00 728,891,450,558.000 FLOKI | 7.2436% |
25 | Binance | COW-USDT | $1.002 0.0002543 Eth | $168,240,338.00 193,354,614.300 COW | 0.0019% |
26 | Bybit | SOL-USDT | $0.9999 0.0002533 Eth | $159,276,645.00 724,696.434 SOL | 0.0000% |
27 | Bitget | BGB-USDT | $1.00 0.0002534 Eth | $156,834,025.00 51,720,733.734 BGB | 0.0005% |
28 | Hotcoin | ETH-USDT | $0.9994 0.0002533 Eth | $149,919,670.00 37,995.670 ETH | 0.0000% |
29 | Gate.io | ETH-USDT | $0.9994 0.0002533 Eth | $146,296,317.00 37,687.639 ETH | 0.0000% |
30 | Bitget | XRP-USDT | $1.00 0.0002534 Eth | $141,312,263.00 58,609,079.147 XRP | 0.0006% |
31 | Bybit | XRP-USDT | $0.9999 0.0002533 Eth | $138,293,305.00 57,362,024.270 XRP | 0.0006% |
32 | KuCoin | ETH-USDT | $0.9999 0.0002533 Eth | $131,147,012.00 33,289.209 ETH | 0.0000% |
33 | Binance | FTM-USDT | $1.001 0.0002537 Eth | $130,967,350.00 98,879,273.000 FTM | 0.0010% |
34 | LATOKEN | ETH-USDT | $0.9994 0.0002532 Eth | $128,962,278.00 32,686.158 ETH | 0.0000% |
35 | Bitget | DOGE-USDT | $0.9999 0.0002533 Eth | $127,896,865.00 319,308,761.932 DOGE | 0.0032% |
36 | WhiteBIT | SOL-USDT | $1.001 0.0002560 Eth | $127,264,135.00 576,638.653 SOL | 0.0000% |
37 | Bitget | X-USDT | $0.9994 0.0002532 Eth | $124,536,597.00 600,825,530,299.700 X | 5.9709% |
38 | BTSE | ETH-USDT | $0.9999 0.0002534 Eth | $120,062,776.00 30,421.383 ETH | 0.0000% |
39 | Binance | AAVE-USDT | $0.9999 0.0002533 Eth | $117,607,649.00 320,011.207 AAVE | 0.0000% |
40 | Binance | AVAX-USDT | $1.004 0.0002552 Eth | $117,605,730.00 2,355,271.600 AVAX | 0.0000% |
41 | Binance | TRX-USDT | $1.001 0.0002537 Eth | $114,944,799.00 408,049,125.100 TRX | 0.0041% |
42 | WhiteBIT | PEPE-USDT | $1.001 0.0002537 Eth | $111,322,020.00 4,630,973,817,559.000 PEPE | 46.0220% |
43 | OKX | XRP-USDT | $0.9994 0.0002533 Eth | $109,086,649.00 45,281,407.852 XRP | 0.0005% |
44 | Binance | ACT-USDT | $0.9999 0.0002533 Eth | $107,094,032.00 196,431,738.600 ACT | 0.0020% |
45 | Binance | DOT-USDT | $1.002 0.0002543 Eth | $102,952,666.00 11,618,120.800 DOT | 0.0001% |
46 | OKX | SOL-USDT | $0.9994 0.0002533 Eth | $102,551,948.00 466,575.691 SOL | 0.0000% |
47 | Binance | PNUT-USDT | $0.9999 0.0002533 Eth | $94,695,182.00 82,825,967.800 PNUT | 0.0008% |
48 | Gate.io | XRP-USDT | $0.9994 0.0002533 Eth | $91,823,973.00 38,087,418.984 XRP | 0.0004% |
49 | Bybit | DOGE-USDT | $0.9999 0.0002533 Eth | $83,271,847.00 207,915,821.100 DOGE | 0.0021% |
50 | Bitget | SOL-USDT | $1.00 0.0002534 Eth | $80,786,271.00 367,269.447 SOL | 0.0000% |
51 | Bybit | MNT-USDT | $0.9999 0.0002533 Eth | $78,749,719.00 64,261,996.570 MNT | 0.0006% |
52 | WhiteBIT | LINK-USDT | $1.00 0.0002563 Eth | $74,984,258.00 2,591,899.070 LINK | 0.0000% |
53 | Dex-Trade | BTC-USDT | $0.9994 0.0002533 Eth | $73,919,127.00 705.819 BTC | 0.0000% |
54 | Gate.io | SUI-USDT | $1.00 0.0002534 Eth | $73,318,240.00 16,049,436.160 SUI | 0.0002% |
55 | Binance | UNI-USDT | $0.9999 0.0002533 Eth | $73,235,786.00 4,394,239.180 UNI | 0.0000% |
56 | Binance | LTC-USDT | $0.9999 0.0002533 Eth | $73,196,172.00 619,835.325 LTC | 0.0000% |
57 | HTX | DOGE-USDT | $0.9994 0.0002533 Eth | $67,828,647.00 169,656,421.722 DOGE | 0.0017% |
58 | Gate.io | DOGE-USDT | $0.9994 0.0002533 Eth | $67,130,029.00 167,881,875.540 DOGE | 0.0017% |
59 | Binance | ARB-USDT | $0.9998 0.0002555 Eth | $66,983,879.00 67,819,344.800 ARB | 0.0007% |
60 | OKX | SUI-USDT | $0.9994 0.0002533 Eth | $63,029,657.00 13,732,125.972 SUI | 0.0001% |
61 | Binance | NEIRO-USDT | $0.9999 0.0002533 Eth | $60,142,929.00 37,329,289,665.000 NEIRO | 0.3710% |
62 | Bitget | SUI-USDT | $0.9994 0.0002532 Eth | $59,679,938.00 13,013,290.440 SUI | 0.0001% |
63 | Bitunix | XRP-USDT | $0.9997 0.0002540 Eth | $58,604,868.00 24,157,150.000 XRP | 0.0002% |
64 | LBank | XRP-USDT | $0.9998 0.0002543 Eth | $55,928,833.00 23,002,967.570 XRP | 0.0002% |
65 | HTX | ETH-USDT | $0.9994 0.0002533 Eth | $54,958,537.00 14,155.223 ETH | 0.0000% |
66 | Gate.io | FLOKI-USDT | $1.00 0.0002534 Eth | $54,245,469.00 233,348,259,974.000 FLOKI | 2.3190% |
67 | BingX | BTC-USDT | $0.9994 0.0002532 Eth | $52,028,292.00 507.161 BTC | 0.0000% |
68 | Binance | RUNE-USDT | $0.9999 0.0002533 Eth | $50,611,002.00 8,046,650.400 RUNE | 0.0001% |
69 | KuCoin | SOL-USDT | $0.9999 0.0002533 Eth | $50,313,694.00 224,884.660 SOL | 0.0000% |
70 | Binance | SAND-USDT | $0.9999 0.0002533 Eth | $49,050,882.00 66,601,957.000 SAND | 0.0007% |
71 | WhiteBIT | FTM-USDT | $0.9994 0.0002533 Eth | $48,620,549.00 34,019,943.473 FTM | 0.0003% |
72 | OKX | PEPE-USDT | $0.9994 0.0002533 Eth | $45,616,161.00 1,948,137,146,325.000 PEPE | 19.3603% |
73 | Bitunix | SOL-USDT | $0.9997 0.0002540 Eth | $43,740,160.00 196,730.660 SOL | 0.0000% |
74 | Gate.io | PEPE-USDT | $1.00 0.0002534 Eth | $43,326,054.00 1,850,475,859,320.000 PEPE | 18.3898% |
75 | BingX | ETH-USDT | $0.9994 0.0002532 Eth | $41,918,399.00 10,800.862 ETH | 0.0000% |
76 | Binance | FIL-USDT | $0.9999 0.0002533 Eth | $41,763,307.00 6,366,794.760 FIL | 0.0001% |
77 | Binance | NEAR-USDT | $0.9999 0.0002533 Eth | $41,389,240.00 6,175,919.000 NEAR | 0.0001% |
78 | BTSE | XRP-USDT | $0.9999 0.0002534 Eth | $41,375,513.00 16,957,350.306 XRP | 0.0002% |
79 | Binance | SEI-USDT | $0.9999 0.0002533 Eth | $39,190,650.00 67,626,040.800 SEI | 0.0007% |
80 | Gate.io | KAS-USDT | $1.00 0.0002534 Eth | $38,830,639.00 249,471,785.000 KAS | 0.0025% |
81 | Gate.io | SOL-USDT | $0.9994 0.0002533 Eth | $36,931,719.00 168,008.814 SOL | 0.0000% |
82 | Azbit | XRP-USDT | $1.001 0.0002537 Eth | $36,368,350.00 15,055,578.160 XRP | 0.0001% |
83 | Bitget | NEIROCTO-USDT | $0.9994 0.0002532 Eth | $35,909,261.00 22,285,331,204.540 NEIROCTO | 0.2215% |
84 | WhiteBIT | AAVE-USDT | $1.002 0.0002543 Eth | $35,827,507.00 96,716.331 AAVE | 0.0000% |
85 | Binance | TAO-USDT | $0.9999 0.0002533 Eth | $35,303,598.00 63,146.244 TAO | 0.0000% |
86 | WhiteBIT | UNI-USDT | $1.004 0.0002552 Eth | $35,236,861.00 2,076,445.950 UNI | 0.0000% |
87 | Binance | TIA-USDT | $1.002 0.0002543 Eth | $34,849,916.00 5,104,517.570 TIA | 0.0001% |
88 | WhiteBIT | DOT-USDT | $1.002 0.0002559 Eth | $33,045,202.00 3,693,258.774 DOT | 0.0000% |
89 | Coinbase Exchange | BTC-USDT | $0.9999 0.0002533 Eth | $30,211,385.00 288.230 BTC | 0.0000% |
90 | Binance | ATOM-USDT | $1.002 0.0002543 Eth | $29,835,645.00 3,308,357.120 ATOM | 0.0000% |
91 | Bitunix | SUI-USDT | $0.9997 0.0002540 Eth | $28,346,154.00 5,948,673.800 SUI | 0.0001% |
92 | Kraken | BTC-USDT | $1.00 0.0002534 Eth | $28,068,682.00 267.790 BTC | 0.0000% |
93 | Binance | BOME-USDT | $0.9999 0.0002560 Eth | $26,738,480.00 3,306,800,879.000 BOME | 0.0329% |
94 | Toobit | BOME-USDT | $0.9999 0.0002575 Eth | $25,729,193.00 3,175,460,306.990 BOME | 0.0316% |
95 | WhiteBIT | FET-USDT | $1.00 0.0002563 Eth | $24,183,284.00 13,616,448.139 FET | 0.0001% |
96 | Bitget | DOT-USDT | $0.9994 0.0002532 Eth | $23,959,475.00 2,714,933.688 DOT | 0.0000% |
97 | DigiFinex | ADA-USDT | $0.9999 0.0002533 Eth | $23,040,318.00 20,846,978.900 ADA | 0.0002% |
98 | Azbit | DOT-USDT | $1.00 0.0002534 Eth | $22,927,549.00 2,620,242.500 DOT | 0.0000% |
99 | Binance | RENDER-USDT | $1.002 0.0002559 Eth | $22,463,287.00 2,458,897.770 RENDER | 0.0000% |
100 | WhiteBIT | AVAX-USDT | $1.001 0.0002560 Eth | $21,573,481.00 435,554.006 AVAX | 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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