Feature Tip: Add private address tag to any address under My Name Tag !
Overview
Max Total Supply
100,000,000 BAND
Holders
35,428 ( -0.008%)
Market
Price
$1.20 @ 0.000380 ETH (-3.91%)
Onchain Market Cap
$120,000,000.00
Circulating Supply Market Cap
$174,128,648.00
Other Info
Token Contract (WITH 18 Decimals)
Balance
0.000082749017245589 BANDValue
$0.00 ( ~0 Eth) [0.0000%]Loading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | BAND-USDT | $1.22 0.0003876 Eth | $1,560,609.00 1,276,397.300 BAND | 13.0286% |
2 | WhiteBIT | BAND-USDT | $1.22 0.0003876 Eth | $1,175,858.00 964,945.200 BAND | 9.8495% |
3 | Nami.Exchange | BAND-VNST | $1.21 0.0003874 Eth | $893,754.00 737,329.200 BAND | 7.5262% |
4 | Nami.Exchange | BAND-USDT | $1.20 0.0003858 Eth | $865,661.00 720,996.600 BAND | 7.3595% |
5 | Trubit | BAND-USDT | $1.21 0.0003867 Eth | $746,495.00 610,544.100 BAND | 6.2320% |
6 | Ourbit | BAND-USDT | $1.19 0.0003838 Eth | $606,669.00 496,407.400 BAND | 5.0670% |
7 | WEEX | BAND-USDT | $1.21 0.0003865 Eth | $597,701.00 488,648.300 BAND | 4.9878% |
8 | Coinsbit | BAND-USDT | $1.21 0.0003871 Eth | $468,773.00 386,029.171 BAND | 3.9403% |
9 | OKX | BAND-USDT | $1.22 0.0003885 Eth | $398,914.00 326,283.204 BAND | 3.3305% |
10 | Biconomy.com | BAND-USDT | $1.21 0.0003872 Eth | $386,028.00 315,450.979 BAND | 3.2199% |
11 | Hotcoin | BAND-USDT | $1.21 0.0003853 Eth | $355,845.00 294,219.700 BAND | 3.0032% |
12 | Bitrue | BAND-USDT | $1.22 0.0003870 Eth | $345,010.00 283,547.170 BAND | 2.8943% |
13 | HTX | BAND-USDT | $1.22 0.0003877 Eth | $319,973.00 261,043.530 BAND | 2.6646% |
14 | BYDFi | BAND-USDT | $1.20 0.0003850 Eth | $295,428.00 246,131.100 BAND | 2.5123% |
15 | Bitazza | BAND-USDT | $1.21 0.0003869 Eth | $283,185.00 231,043.800 BAND | 2.3583% |
16 | Icrypex | BAND-USDT | $1.22 0.0003887 Eth | $269,352.00 221,398.792 BAND | 2.2599% |
17 | BTSE | BAND-USDT | $1.22 0.0003881 Eth | $213,330.00 174,817.114 BAND | 1.7844% |
18 | Bitunix | BAND-USDT | $1.21 0.0003856 Eth | $193,316.00 159,705.600 BAND | 1.6302% |
19 | XT.COM | BAND-USDT | $1.22 0.0003873 Eth | $175,377.00 143,681.700 BAND | 1.4666% |
20 | Toobit | BAND-USDT | $1.20 0.0003856 Eth | $162,744.00 133,169.900 BAND | 1.3593% |
21 | AscendEX (BitMax) | BAND-USDT | $1.22 0.0003870 Eth | $147,895.00 121,547.300 BAND | 1.2407% |
22 | FameEX | BAND-USDT | $1.22 0.0003877 Eth | $147,599.00 120,621.396 BAND | 1.2312% |
23 | Coinbase Exchange | BAND-USD | $1.21 0.0003854 Eth | $142,672.00 117,910.390 BAND | 1.2036% |
24 | BtcTurk | Kripto | BAND-TRY | $1.21 0.0003866 Eth | $117,269.00 96,997.369 BAND | 0.9901% |
25 | CoinTR | BAND-USDT | $1.20 0.0003841 Eth | $78,964.00 64,408.306 BAND | 0.6574% |
26 | DigiFinex | BAND-USDT | $1.22 0.0003876 Eth | $74,840.00 61,436.800 BAND | 0.6271% |
27 | Bitget | BAND-USDT | $1.22 0.0003867 Eth | $73,437.00 59,933.172 BAND | 0.6118% |
28 | BitMart | BAND-USDT | $1.21 0.0003856 Eth | $66,702.00 55,100.400 BAND | 0.5624% |
29 | LATOKEN | BAND-USDT | $1.20 0.0003842 Eth | $58,381.00 48,633.922 BAND | 0.4964% |
30 | Bitkub | BAND-THB | $1.21 0.0003847 Eth | $52,976.00 43,874.000 BAND | 0.4478% |
31 | Tokenize | BAND-SGD | $1.21 0.0003849 Eth | $51,637.00 42,733.925 BAND | 0.4362% |
32 | Tokenize | BAND-USD | $1.21 0.0003851 Eth | $51,603.00 42,699.876 BAND | 0.4359% |
33 | Phemex | BAND-USDT | $1.21 0.0003861 Eth | $45,149.00 37,383.540 BAND | 0.3816% |
34 | Dex-Trade | BAND-USDT | $1.21 0.0003855 Eth | $43,780.00 36,170.800 BAND | 0.3692% |
35 | BingX | BAND-USDT | $1.21 0.0003862 Eth | $41,831.00 34,182.367 BAND | 0.3489% |
36 | Binance | BAND-BTC | $1.21 0.0003841 Eth | $39,389.00 32,866.000 BAND | 0.3355% |
37 | Koinpark | BAND-USDT | $1.22 0.0003871 Eth | $39,293.00 32,292.761 BAND | 0.3296% |
38 | BloFin | BAND-USDT | $1.22 0.0003871 Eth | $38,370.00 31,308.600 BAND | 0.3196% |
39 | Gate.io | BAND-USDT | $1.21 0.0003858 Eth | $33,148.00 26,823.390 BAND | 0.2738% |
40 | Bitvavo | BAND-EUR | $1.19 0.0003811 Eth | $32,935.00 27,706.918 BAND | 0.2828% |
41 | Kraken | BAND-USD | $1.19 0.0003779 Eth | $30,746.00 25,880.128 BAND | 0.2642% |
42 | Paribu | BAND-TRY | $1.19 0.0003819 Eth | $26,280.00 22,094.880 BAND | 0.2255% |
43 | P2B | BAND-USDT | $1.21 0.0003853 Eth | $21,232.00 17,555.100 BAND | 0.1792% |
44 | LATOKEN | BAND-BTC | $1.21 0.0003858 Eth | $18,483.86 15,315.119 BAND | 0.1563% |
45 | Bilaxy | BAND-USDT | $1.19 0.0003817 Eth | $18,438.04 15,437.000 BAND | 0.1576% |
46 | KuCoin | BAND-USDT | $1.22 0.0003876 Eth | $17,513.15 14,401.820 BAND | 0.1470% |
47 | Crypto.com Exchange | BAND-USD | $1.23 0.0003905 Eth | $15,413.65 12,554.900 BAND | 0.1282% |
48 | Currency.com | BAND-USD | $1.22 0.0003878 Eth | $11,205.35 9,210.000 BAND | 0.0940% |
49 | DeGate | 0XBA11D00C5F74255F56A5E366F4F77F5A186D7F55-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48 | $1.21 0.0003866 Eth | $9,094.66 7,418.319 0XBA11D00C5F74255F56A5E366F4F77F5A186D7F55 | 0.0757% |
50 | Binance US | BAND-USDT | $1.19 0.0003792 Eth | $8,051.37 6,763.856 BAND | 0.0690% |
51 | BtcTurk | Kripto | BAND-USDT | $1.17 0.0003740 Eth | $7,437.37 6,354.058 BAND | 0.0649% |
52 | Crypto.com Exchange | BAND-USDT | $1.20 0.0003817 Eth | $7,421.29 6,184.500 BAND | 0.0631% |
53 | Kanga | BAND-USDT | $1.20 0.0003857 Eth | $6,653.31 0.000 BAND | 0.0000% |
54 | Cryptology | BAND-USDT | $1.19 0.0003821 Eth | $4,685.58 3,932.400 BAND | 0.0401% |
55 | Bit2Me | BAND-EUR | $1.19 0.0003779 Eth | $4,357.65 3,547.954 BAND | 0.0362% |
56 | Kraken | BAND-EUR | $1.19 0.0003779 Eth | $4,301.17 3,620.361 BAND | 0.0370% |
57 | P2B | BAND-USD | $1.21 0.0003861 Eth | $3,941.06 3,251.700 BAND | 0.0332% |
58 | Pionex | BAND-USDT | $1.21 0.0003870 Eth | $3,771.63 3,092.840 BAND | 0.0316% |
59 | Vindax | BAND-USDT | $1.19 0.0003819 Eth | $3,590.85 3,015.700 BAND | 0.0308% |
60 | CoinEx | BAND-USDT | $1.20 0.0003853 Eth | $3,581.17 2,930.867 BAND | 0.0299% |
61 | Sushiswap | 0XBA11D00C5F74255F56A5E366F4F77F5A186D7F55-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $1.22 0.0003873 Eth | $3,405.47 2,797.560 0XBA11D00C5F74255F56A5E366F4F77F5A186D7F55 | 0.0286% |
62 | Coinmetro | BAND-USDT | $1.25 0.0003985 Eth | $2,505.51 2,000.000 BAND | 0.0204% |
63 | CoinEx | BAND-BTC | $1.21 0.0003843 Eth | $2,098.49 1,745.229 BAND | 0.0178% |
64 | OKX | BAND-USDC | $1.19 0.0003782 Eth | $1,768.44 1,456.141 BAND | 0.0149% |
65 | TokoCrypto | BAND-USDT | $1.21 0.0003865 Eth | $1,548.00 1,280.283 BAND | 0.0131% |
66 | Coinsbit | BAND-BTC | $1.21 0.0003863 Eth | $1,509.11 1,248.460 BAND | 0.0127% |
67 | Korbit | BAND-KRW | $1.23 0.0003907 Eth | $1,409.09 1,139.678 BAND | 0.0116% |
68 | Bitazza | BAND-THB | $1.22 0.0003878 Eth | $1,344.08 1,093.500 BAND | 0.0112% |
69 | Bitstamp | BAND-EUR | $1.27 0.0004034 Eth | $1,316.19 1,037.690 BAND | 0.0106% |
70 | Bitstamp | BAND-USD | $1.34 0.0004253 Eth | $1,172.01 876.600 BAND | 0.0089% |
71 | Dex-Trade | BAND-BTC | $1.21 0.0003862 Eth | $1,117.72 925.000 BAND | 0.0094% |
72 | Nominex | BAND-USDT | $1.20 0.0003848 Eth | $817.74 681.192 BAND | 0.0070% |
73 | P2B | BAND-BTC | $1.20 0.0003831 Eth | $684.20 570.800 BAND | 0.0058% |
74 | Mudrex | BAND-USDT | $1.21 0.0003865 Eth | $435.36 358.388 BAND | 0.0037% |
75 | Pionex | BAND-BTC | $1.21 0.0003846 Eth | $360.12 301.000 BAND | 0.0031% |
76 | KuCoin | BAND-BTC | $1.18 0.0003754 Eth | $298.78 253.687 BAND | 0.0026% |
77 | Mercado Bitcoin | BAND-BRL | $1.21 0.0003854 Eth | $228.30 188.443 BAND | 0.0019% |
78 | CoinJar Exchange | BAND-GBP | $1.39 0.0004394 Eth | $194.77 140.000 BAND | 0.0014% |
79 | Nominex | BAND-BTC | $1.20 0.0003845 Eth | $55.98 46.676 BAND | 0.0005% |
80 | ProBit Global | BAND-USDT | $1.11 0.0003531 Eth | $54.37 49.050 BAND | 0.0005% |
81 | Indodax | BAND-IDR | $1.23 0.0003928 Eth | $48.05 39.129 BAND | 0.0004% |
82 | CEX.IO | BAND-USDT | $1.21 0.0003872 Eth | $33.45 27.849 BAND | 0.0003% |
83 | CEX.IO | BAND-EUR | $1.22 0.0003892 Eth | $29.43 24.498 BAND | 0.0003% |
84 | Bittime | BAND-IDR | $1.21 0.0003882 Eth | $28.52 22.010 BAND | 0.0002% |
85 | CEX.IO | BAND-USD | $1.20 0.0003855 Eth | $25.17 20.415 BAND | 0.0002% |
86 | Orbix | BAND-THB | $1.26 0.0004036 Eth | $16.42 13.000 BAND | 0.0001% |
87 | ProBit Global | BAND-BTC | $1.31 0.0004181 Eth | $14.82 11.300 BAND | 0.0001% |
88 | HitBTC | BAND-USDT | $1.22 0.0003885 Eth | $13.87 11.374 BAND | 0.0001% |
89 | CoinJar Exchange | BAND-USDC | $1.31 0.0004112 Eth | $13.07 10.000 BAND | 0.0001% |
90 | CoinJar Exchange | BAND-AUD | $1.30 0.0004075 Eth | $12.96 10.000 BAND | 0.0001% |
91 | Gate.io | BAND-ETH | $1.22 0.0003825 Eth | $4.34 3.542 BAND | 0.0000% |
92 | Coinone | BAND-KRW | $1.28 0.0004069 Eth | $3.83 3.000 BAND | 0.0000% |
93 | Poloniex | BAND-USDT | $1.25 0.0003993 Eth | $2.01 1.607 BAND | 0.0000% |
94 | SpookySwap | 0X46E7628E8B4350B2716AB470EE0BA1FA9E76C6C5-0X21BE370D5312F44CB42CE377BC9B8A0CEF1A4C83 | $0.3717 0.0001194 Eth | $1.66 4.484 0X46E7628E8B4350B2716AB470EE0BA1FA9E76C6C5 | 0.0000% |
95 | Giottus | BAND-INR | $1.30 0.0004149 Eth | $1.48 1.136 BAND | 0.0000% |
96 | Uniswap V2 (Ethereum) | 0XBA11D00C5F74255F56A5E366F4F77F5A186D7F55-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $1.24 0.0003939 Eth | $1.14 0.921 0XBA11D00C5F74255F56A5E366F4F77F5A186D7F55 | 0.0000% |
97 | HitBTC | BAND-BTC | $1.25 0.0003811 Eth | $0.1249 0.100 BAND | 0.0000% |
98 | BitBNS | BAND-INR | $0.9481 0.0002974 Eth | $0.0759 0.080 BAND | 0.0000% |
99 | Coinmetro | BAND-USD | $1.20 0.0003785 Eth | $0.00 0.000 BAND | 0.0000% |
100 | Coinmetro | BAND-EUR | $1.20 0.0003785 Eth | $0.00 0.000 BAND | 0.0000% |
Contract Name:
BandToken
Compiler Version
v0.5.9+commit.e560f70d
Contract Source Code (Solidity)
/** *Submitted for verification at Etherscan.io on 2019-09-09 */ // File: openzeppelin-solidity/contracts/token/ERC20/IERC20.sol pragma solidity ^0.5.0; /** * @title ERC20 interface * @dev see https://github.com/ethereum/EIPs/issues/20 */ interface IERC20 { function transfer(address to, uint256 value) external returns (bool); function approve(address spender, uint256 value) external returns (bool); function transferFrom(address from, address to, uint256 value) external returns (bool); function totalSupply() external view returns (uint256); function balanceOf(address who) external view returns (uint256); function allowance(address owner, address spender) external view returns (uint256); event Transfer(address indexed from, address indexed to, uint256 value); event Approval(address indexed owner, address indexed spender, uint256 value); } // File: openzeppelin-solidity/contracts/math/SafeMath.sol pragma solidity ^0.5.0; /** * @title SafeMath * @dev Unsigned math operations with safety checks that revert on error */ library SafeMath { /** * @dev Multiplies two unsigned integers, reverts on overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b); return c; } /** * @dev Integer division of two unsigned integers truncating the quotient, reverts on division by zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { // Solidity only automatically asserts when dividing by 0 require(b > 0); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Subtracts two unsigned integers, reverts on overflow (i.e. if subtrahend is greater than minuend). */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { require(b <= a); uint256 c = a - b; return c; } /** * @dev Adds two unsigned integers, reverts on overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a); return c; } /** * @dev Divides two unsigned integers and returns the remainder (unsigned integer modulo), * reverts when dividing by zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { require(b != 0); return a % b; } } // File: openzeppelin-solidity/contracts/token/ERC20/ERC20.sol pragma solidity ^0.5.0; /** * @title Standard ERC20 token * * @dev Implementation of the basic standard token. * https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md * Originally based on code by FirstBlood: * https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol * * This implementation emits additional Approval events, allowing applications to reconstruct the allowance status for * all accounts just by listening to said events. Note that this isn't required by the specification, and other * compliant implementations may not do it. */ contract ERC20 is IERC20 { using SafeMath for uint256; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowed; uint256 private _totalSupply; /** * @dev Total number of tokens in existence */ function totalSupply() public view returns (uint256) { return _totalSupply; } /** * @dev Gets the balance of the specified address. * @param owner The address to query the balance of. * @return An uint256 representing the amount owned by the passed address. */ function balanceOf(address owner) public view returns (uint256) { return _balances[owner]; } /** * @dev Function to check the amount of tokens that 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 uint256 specifying the amount of tokens still available for the spender. */ function allowance(address owner, address spender) public view returns (uint256) { return _allowed[owner][spender]; } /** * @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, uint256 value) public returns (bool) { _transfer(msg.sender, to, value); return true; } /** * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender. * Beware that changing an allowance with this method brings the risk that someone may use both the old * and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this * race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * @param spender The address which will spend the funds. * @param value The amount of tokens to be spent. */ function approve(address spender, uint256 value) public returns (bool) { require(spender != address(0)); _allowed[msg.sender][spender] = value; emit Approval(msg.sender, spender, value); return true; } /** * @dev Transfer tokens from one address to another. * Note that while this function emits an Approval event, this is not required as per the specification, * and other compliant implementations may not emit the event. * @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 uint256 the amount of tokens to be transferred */ function transferFrom(address from, address to, uint256 value) public returns (bool) { _allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value); _transfer(from, to, value); emit Approval(from, msg.sender, _allowed[from][msg.sender]); return true; } /** * @dev Increase the amount of tokens that an owner allowed to a spender. * approve should be called when allowed_[_spender] == 0. To increment * allowed value is better to use this function to avoid 2 calls (and wait until * the first transaction is mined) * From MonolithDAO Token.sol * Emits an Approval event. * @param spender The address which will spend the funds. * @param addedValue The amount of tokens to increase the allowance by. */ function increaseAllowance(address spender, uint256 addedValue) public returns (bool) { require(spender != address(0)); _allowed[msg.sender][spender] = _allowed[msg.sender][spender].add(addedValue); emit Approval(msg.sender, spender, _allowed[msg.sender][spender]); return true; } /** * @dev Decrease the amount of tokens that an owner allowed to a spender. * approve should be called when allowed_[_spender] == 0. To decrement * allowed value is better to use this function to avoid 2 calls (and wait until * the first transaction is mined) * From MonolithDAO Token.sol * Emits an Approval event. * @param spender The address which will spend the funds. * @param subtractedValue The amount of tokens to decrease the allowance by. */ function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) { require(spender != address(0)); _allowed[msg.sender][spender] = _allowed[msg.sender][spender].sub(subtractedValue); emit Approval(msg.sender, spender, _allowed[msg.sender][spender]); return true; } /** * @dev Transfer token for a specified addresses * @param from The address to transfer from. * @param to The address to transfer to. * @param value The amount to be transferred. */ function _transfer(address from, address to, uint256 value) internal { require(to != address(0)); _balances[from] = _balances[from].sub(value); _balances[to] = _balances[to].add(value); emit Transfer(from, to, value); } /** * @dev Internal function that mints an amount of the token and assigns it to * an account. This encapsulates the modification of balances such that the * proper events are emitted. * @param account The account that will receive the created tokens. * @param value The amount that will be created. */ function _mint(address account, uint256 value) internal { require(account != address(0)); _totalSupply = _totalSupply.add(value); _balances[account] = _balances[account].add(value); emit Transfer(address(0), account, value); } /** * @dev Internal function that burns an amount of the token of a given * account. * @param account The account whose tokens will be burnt. * @param value The amount that will be burnt. */ function _burn(address account, uint256 value) internal { require(account != address(0)); _totalSupply = _totalSupply.sub(value); _balances[account] = _balances[account].sub(value); emit Transfer(account, address(0), value); } /** * @dev Internal function that burns an amount of the token of a given * account, deducting from the sender's allowance for said account. Uses the * internal burn function. * Emits an Approval event (reflecting the reduced allowance). * @param account The account whose tokens will be burnt. * @param value The amount that will be burnt. */ function _burnFrom(address account, uint256 value) internal { _allowed[account][msg.sender] = _allowed[account][msg.sender].sub(value); _burn(account, value); emit Approval(account, msg.sender, _allowed[account][msg.sender]); } } // File: openzeppelin-solidity/contracts/access/Roles.sol pragma solidity ^0.5.0; /** * @title Roles * @dev Library for managing addresses assigned to a Role. */ library Roles { struct Role { mapping (address => bool) bearer; } /** * @dev give an account access to this role */ function add(Role storage role, address account) internal { require(account != address(0)); require(!has(role, account)); role.bearer[account] = true; } /** * @dev remove an account's access to this role */ function remove(Role storage role, address account) internal { require(account != address(0)); require(has(role, account)); role.bearer[account] = false; } /** * @dev check if an account has this role * @return bool */ function has(Role storage role, address account) internal view returns (bool) { require(account != address(0)); return role.bearer[account]; } } // File: openzeppelin-solidity/contracts/access/roles/MinterRole.sol pragma solidity ^0.5.0; contract MinterRole { using Roles for Roles.Role; event MinterAdded(address indexed account); event MinterRemoved(address indexed account); Roles.Role private _minters; constructor () internal { _addMinter(msg.sender); } modifier onlyMinter() { require(isMinter(msg.sender)); _; } function isMinter(address account) public view returns (bool) { return _minters.has(account); } function addMinter(address account) public onlyMinter { _addMinter(account); } function renounceMinter() public { _removeMinter(msg.sender); } function _addMinter(address account) internal { _minters.add(account); emit MinterAdded(account); } function _removeMinter(address account) internal { _minters.remove(account); emit MinterRemoved(account); } } // File: contracts/token/ERC20Interface.sol pragma solidity 0.5.9; interface ERC20Interface { // Standard ERC-20 interface. function transfer(address to, uint256 value) external returns (bool); function approve(address spender, uint256 value) external returns (bool); function transferFrom(address from, address to, uint256 value) external returns (bool); function totalSupply() external view returns (uint256); function balanceOf(address who) external view returns (uint256); function allowance(address owner, address spender) external view returns (uint256); // Extension of ERC-20 interface to support supply adjustment. function mint(address to, uint256 value) external returns (bool); function burn(address from, uint256 value) external returns (bool); } // File: contracts/token/ERC20Base.sol pragma solidity 0.5.9; /// "ERC20Base" is the standard ERC-20 implementation that allows its minter to mint tokens. Both BandToken and /// CommunityToken extend from ERC20Base. In addition to the standard functions, the class provides `transferAndCall` /// function, which performs a transfer and invokes the given function using the provided data. If the destination /// contract uses "ERC20Acceptor" interface, it can verify that the caller properly sends appropriate amount of tokens. contract ERC20Base is ERC20Interface, ERC20, MinterRole { string public name; string public symbol; uint8 public decimals = 18; constructor(string memory _name, string memory _symbol) public { name = _name; symbol = _symbol; } function transferAndCall(address to, uint256 value, bytes4 sig, bytes memory data) public returns (bool) { require(to != address(this)); _transfer(msg.sender, to, value); (bool success,) = to.call(abi.encodePacked(sig, uint256(msg.sender), value, data)); require(success); return true; } function mint(address to, uint256 value) public onlyMinter returns (bool) { _mint(to, value); return true; } function burn(address from, uint256 value) public onlyMinter returns (bool) { _burn(from, value); return true; } } // File: contracts/token/SnapshotToken.sol pragma solidity 0.5.9; contract SnapshotToken is ERC20Base { using SafeMath for uint256; /// IMPORTANT: votingPowers are kept as a linked list of ALL historical changes. /// - This allows the contract to figure out voting power of the address at any nonce `n`, by /// searching for the node that has the biggest nonce that is not greater than `n`. /// - For efficiency, nonce and power are packed into one uint256 integer, with the top 64 bits /// representing nonce, and the bottom 192 bits representing voting power. mapping (address => mapping(uint256 => uint256)) _votingPower; mapping (address => uint256) public votingPowerChangeCount; uint256 public votingPowerChangeNonce = 0; /// Returns user voting power at the given index, that is, as of the user's index^th voting power change function historicalVotingPowerAtIndex(address owner, uint256 index) public view returns (uint256) { require(index <= votingPowerChangeCount[owner]); return _votingPower[owner][index] & ((1 << 192) - 1); // Lower 192 bits } /// Returns user voting power at the given time. Under the hood, this performs binary search /// to look for the largest index at which the nonce is not greater than 'nonce'. /// The voting power at that index is the returning value. function historicalVotingPowerAtNonce(address owner, uint256 nonce) public view returns (uint256) { require(nonce <= votingPowerChangeNonce && nonce < (1 << 64)); uint256 start = 0; uint256 end = votingPowerChangeCount[owner]; while (start < end) { uint256 mid = start.add(end).add(1).div(2); /// Use (start+end+1)/2 to prevent infinite loop. if ((_votingPower[owner][mid] >> 192) > nonce) { /// Upper 64-bit nonce /// If midTime > nonce, this mid can't possibly be the answer. end = mid.sub(1); } else { /// Otherwise, search on the greater side, but still keep mid as a possible option. start = mid; } } return historicalVotingPowerAtIndex(owner, start); } function _transfer(address from, address to, uint256 value) internal { super._transfer(from, to, value); votingPowerChangeNonce = votingPowerChangeNonce.add(1); _changeVotingPower(from); _changeVotingPower(to); } function _mint(address account, uint256 amount) internal { super._mint(account, amount); votingPowerChangeNonce = votingPowerChangeNonce.add(1); _changeVotingPower(account); } function _burn(address account, uint256 amount) internal { super._burn(account, amount); votingPowerChangeNonce = votingPowerChangeNonce.add(1); _changeVotingPower(account); } function _changeVotingPower(address account) internal { uint256 currentIndex = votingPowerChangeCount[account]; uint256 newPower = balanceOf(account); require(newPower < (1 << 192)); require(votingPowerChangeNonce < (1 << 64)); currentIndex = currentIndex.add(1); votingPowerChangeCount[account] = currentIndex; _votingPower[account][currentIndex] = (votingPowerChangeNonce << 192) | newPower; } } // File: contracts/BandToken.sol pragma solidity 0.5.9; /// "BandToken" is the native ERC-20 token of Band Protocol. contract BandToken is ERC20Base("BandToken", "BAND"), SnapshotToken {}
Contract Security Audit
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[{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"spender","type":"address"},{"name":"value","type":"uint256"}],"name":"approve","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"from","type":"address"},{"name":"to","type":"address"},{"name":"value","type":"uint256"}],"name":"transferFrom","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint8"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"spender","type":"address"},{"name":"addedValue","type":"uint256"}],"name":"increaseAllowance","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"to","type":"address"},{"name":"value","type":"uint256"},{"name":"sig","type":"bytes4"},{"name":"data","type":"bytes"}],"name":"transferAndCall","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"to","type":"address"},{"name":"value","type":"uint256"}],"name":"mint","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"votingPowerChangeNonce","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"votingPowerChangeCount","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"owner","type":"address"}],"name":"balanceOf","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"account","type":"address"}],"name":"addMinter","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[],"name":"renounceMinter","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"from","type":"address"},{"name":"value","type":"uint256"}],"name":"burn","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"spender","type":"address"},{"name":"subtractedValue","type":"uint256"}],"name":"decreaseAllowance","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"to","type":"address"},{"name":"value","type":"uint256"}],"name":"transfer","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"account","type":"address"}],"name":"isMinter","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"owner","type":"address"},{"name":"nonce","type":"uint256"}],"name":"historicalVotingPowerAtNonce","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"owner","type":"address"},{"name":"index","type":"uint256"}],"name":"historicalVotingPowerAtIndex","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"owner","type":"address"},{"name":"spender","type":"address"}],"name":"allowance","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"anonymous":false,"inputs":[{"indexed":true,"name":"account","type":"address"}],"name":"MinterAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"account","type":"address"}],"name":"MinterRemoved","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"from","type":"address"},{"indexed":true,"name":"to","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"owner","type":"address"},{"indexed":true,"name":"spender","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Approval","type":"event"}]
Contract Creation Code
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Swarm Source
bzzr://8c832d942f5f6d66aecf620c67bda2dccbe3e9b07502f05bcf01391244f43e6e
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