Overview
Max Total Supply
100,000,000 BAND
Holders
35,448 (0.00%)
Market
Price
$1.00 @ 0.000411 ETH (-0.02%)
Onchain Market Cap
$99,796,400.00
Circulating Supply Market Cap
$144,592,437.00
Other Info
Token Contract (WITH 18 Decimals)
Balance
14.48794504 BANDValue
$14.46 ( ~0.00595536902375763 Eth) [0.0000%]Loading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | WhiteBIT | BAND-USDT | $0.9973 0.0004109 Eth | $1,098,789.00 1,101,813.600 BAND | 14.9923% |
2 | Trubit | BAND-USDT | $0.9964 0.0004106 Eth | $849,761.00 862,057.600 BAND | 11.7300% |
3 | Binance | BAND-USDT | $0.9954 0.0004098 Eth | $661,770.00 672,006.700 BAND | 9.1440% |
4 | Nami.Exchange | BAND-VNST | $1.001 0.0004127 Eth | $591,878.00 591,047.500 BAND | 8.0424% |
5 | Nami.Exchange | BAND-USDT | $0.9972 0.0004109 Eth | $583,702.00 585,319.200 BAND | 7.9644% |
6 | Biconomy.com | BAND-USDT | $0.9953 0.0004101 Eth | $283,748.00 287,713.116 BAND | 3.9149% |
7 | Bitazza | BAND-USDT | $0.9932 0.0004092 Eth | $283,324.00 286,888.200 BAND | 3.9037% |
8 | Ourbit | BAND-USDT | $0.9984 0.0004114 Eth | $273,224.00 277,467.200 BAND | 3.7755% |
9 | Coinsbit | BAND-USDT | $0.9972 0.0004109 Eth | $201,100.00 201,658.717 BAND | 2.7440% |
10 | Hotcoin | BAND-USDT | $0.9962 0.0004106 Eth | $197,164.00 197,921.800 BAND | 2.6931% |
11 | Icrypex | BAND-USDT | $0.9903 0.0004080 Eth | $187,874.00 189,722.350 BAND | 2.5815% |
12 | WEEX | BAND-USDT | $0.9962 0.0004105 Eth | $173,919.00 176,370.600 BAND | 2.3999% |
13 | AscendEX (BitMax) | BAND-USDT | $0.9929 0.0004091 Eth | $150,021.00 151,100.300 BAND | 2.0560% |
14 | HTX | BAND-USDT | $0.9961 0.0004104 Eth | $145,016.00 147,134.116 BAND | 2.0020% |
15 | Bitrue | BAND-USDT | $0.9973 0.0004109 Eth | $142,699.00 143,089.530 BAND | 1.9470% |
16 | Icrypex | BAND-TRY | $1.18 0.0004435 Eth | $133,500.00 113,161.140 BAND | 1.5398% |
17 | BYDFi | BAND-USDT | $0.9974 0.0004110 Eth | $132,810.00 133,161.600 BAND | 1.8119% |
18 | FameEX | BAND-USDT | $0.9953 0.0004102 Eth | $93,494.00 94,797.518 BAND | 1.2899% |
19 | OKX | BAND-USDT | $0.9943 0.0004097 Eth | $90,956.00 93,141.713 BAND | 1.2674% |
20 | Toobit | BAND-USDT | $0.9952 0.0004102 Eth | $80,113.00 81,315.900 BAND | 1.1065% |
21 | Bitget | BAND-USDT | $0.9963 0.0004105 Eth | $78,690.00 79,776.011 BAND | 1.0855% |
22 | Bitunix | BAND-USDT | $0.9962 0.0004105 Eth | $64,134.00 64,312.200 BAND | 0.8751% |
23 | CoinTR | BAND-USDT | $0.9957 0.0004103 Eth | $62,791.00 63,575.297 BAND | 0.8651% |
24 | BitMart | BAND-USDT | $0.9974 0.0004110 Eth | $61,883.00 62,047.140 BAND | 0.8443% |
25 | Crypto.com Exchange | BAND-USD | $0.9965 0.0004106 Eth | $55,395.00 55,589.900 BAND | 0.7564% |
26 | BTSE | BAND-USDT | $0.9972 0.0004109 Eth | $55,270.00 55,423.767 BAND | 0.7541% |
27 | Tokenize | BAND-SGD | $0.9979 0.0004110 Eth | $43,433.00 43,523.703 BAND | 0.5922% |
28 | Tokenize | BAND-USD | $0.996 0.0004104 Eth | $43,276.00 43,449.518 BAND | 0.5912% |
29 | BloFin | BAND-USDT | $0.9972 0.0004110 Eth | $39,534.00 40,039.800 BAND | 0.5448% |
30 | XT.COM | BAND-USDT | $0.9943 0.0004097 Eth | $37,077.00 37,964.400 BAND | 0.5166% |
31 | BtcTurk | Kripto | BAND-TRY | $0.9971 0.0004108 Eth | $35,046.00 35,147.459 BAND | 0.4783% |
32 | BingX | BAND-USDT | $0.9973 0.0004109 Eth | $32,899.00 33,344.359 BAND | 0.4537% |
33 | Currency.com | BAND-USD | $0.997 0.0004108 Eth | $30,190.00 30,282.000 BAND | 0.4120% |
34 | Bitkub | BAND-THB | $1.021 0.0004209 Eth | $28,985.00 28,377.207 BAND | 0.3861% |
35 | Crypto.com Exchange | BAND-USDT | $0.9934 0.0004093 Eth | $28,953.00 29,146.900 BAND | 0.3966% |
36 | DigiFinex | BAND-USDT | $0.9947 0.0004099 Eth | $27,861.00 28,007.900 BAND | 0.3811% |
37 | LATOKEN | BAND-USDT | $0.997 0.0004109 Eth | $26,712.00 26,792.927 BAND | 0.3646% |
38 | Coinbase Exchange | BAND-USD | $0.998 0.0004112 Eth | $26,415.00 26,468.070 BAND | 0.3602% |
39 | Dex-Trade | BAND-USDT | $0.9983 0.0004114 Eth | $22,863.00 22,902.100 BAND | 0.3116% |
40 | Phemex | BAND-USDT | $0.9965 0.0004103 Eth | $20,056.00 20,126.210 BAND | 0.2739% |
41 | Koinpark | BAND-USDT | $0.9944 0.0004102 Eth | $16,884.48 16,979.961 BAND | 0.2310% |
42 | P2B | BAND-USDT | $0.9963 0.0004105 Eth | $16,199.61 16,260.200 BAND | 0.2213% |
43 | Paribu | BAND-TRY | $0.9904 0.0004081 Eth | $14,652.39 14,794.130 BAND | 0.2013% |
44 | KuCoin | BAND-USDT | $0.9992 0.0004117 Eth | $14,106.97 14,117.906 BAND | 0.1921% |
45 | Binance | BAND-BTC | $0.9991 0.0004117 Eth | $11,938.69 12,060.400 BAND | 0.1641% |
46 | Coinone | BAND-KRW | $0.9866 0.0004065 Eth | $11,769.57 11,929.978 BAND | 0.1623% |
47 | Bilaxy | BAND-USDT | $1.001 0.0004125 Eth | $11,006.36 10,992.900 BAND | 0.1496% |
48 | LATOKEN | BAND-BTC | $1.00 0.0004120 Eth | $10,919.94 10,917.715 BAND | 0.1486% |
49 | BtcTurk | Kripto | BAND-USDT | $0.9893 0.0004076 Eth | $6,125.76 6,192.149 BAND | 0.0843% |
50 | Kraken | BAND-USD | $0.99 0.0004080 Eth | $5,530.42 5,586.280 BAND | 0.0760% |
51 | Kraken | BAND-EUR | $0.9867 0.0004066 Eth | $4,957.82 5,024.428 BAND | 0.0684% |
52 | Bit2Me | BAND-EUR | $0.9867 0.0004066 Eth | $4,839.91 4,923.939 BAND | 0.0670% |
53 | Cryptology | BAND-USDT | $0.9943 0.0004097 Eth | $4,112.42 4,136.100 BAND | 0.0563% |
54 | DeGate | 0XBA11D00C5F74255F56A5E366F4F77F5A186D7F55-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48 | $0.9944 0.0004099 Eth | $3,987.61 4,046.834 0XBA11D00C5F74255F56A5E366F4F77F5A186D7F55 | 0.0551% |
55 | Gate.io | BAND-USDT | $0.9946 0.0004098 Eth | $3,608.27 3,674.310 BAND | 0.0500% |
56 | Kanga | BAND-USDT | $0.9943 0.0004097 Eth | $3,492.94 0.000 BAND | 0.0000% |
57 | CoinEx | BAND-BTC | $0.9924 0.0004089 Eth | $3,354.80 3,378.909 BAND | 0.0460% |
58 | Nominex | BAND-USDT | $0.9963 0.0004105 Eth | $3,301.75 3,314.165 BAND | 0.0451% |
59 | CoinEx | BAND-USDT | $0.9938 0.0004095 Eth | $2,697.80 2,743.778 BAND | 0.0373% |
60 | Sushiswap | 0XBA11D00C5F74255F56A5E366F4F77F5A186D7F55-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $0.9882 0.0004072 Eth | $2,267.95 2,313.842 0XBA11D00C5F74255F56A5E366F4F77F5A186D7F55 | 0.0315% |
61 | P2B | BAND-USD | $0.997 0.0004108 Eth | $2,265.08 2,271.900 BAND | 0.0309% |
62 | Bitazza | BAND-THB | $1.006 0.0004144 Eth | $2,166.75 2,190.800 BAND | 0.0298% |
63 | Vindax | BAND-USDT | $0.9914 0.0004082 Eth | $1,978.71 1,995.900 BAND | 0.0272% |
64 | Bitvavo | BAND-EUR | $0.997 0.0004108 Eth | $1,236.65 1,240.333 BAND | 0.0169% |
65 | Pionex | BAND-USDT | $0.9972 0.0004109 Eth | $1,012.51 1,028.130 BAND | 0.0140% |
66 | CoinJar Exchange | BAND-AUD | $1.033 0.0004181 Eth | $764.18 740.000 BAND | 0.0101% |
67 | CoinJar Exchange | BAND-USDC | $1.025 0.0004149 Eth | $758.19 740.000 BAND | 0.0101% |
68 | Coinsbit | BAND-BTC | $0.9991 0.0004115 Eth | $757.68 758.357 BAND | 0.0103% |
69 | Mercado Bitcoin | BAND-BRL | $0.953 0.0003927 Eth | $692.46 726.587 BAND | 0.0099% |
70 | Dex-Trade | BAND-BTC | $1.003 0.0004131 Eth | $378.99 378.000 BAND | 0.0051% |
71 | Mudrex | BAND-USDT | $0.9963 0.0004105 Eth | $248.07 249.007 BAND | 0.0034% |
72 | Bitstamp | BAND-USD | $1.17 0.0004381 Eth | $228.34 196.000 BAND | 0.0027% |
73 | Binance US | BAND-USDT | $0.9834 0.0004053 Eth | $193.16 196.420 BAND | 0.0027% |
74 | P2B | BAND-BTC | $0.9751 0.0004017 Eth | $162.16 166.300 BAND | 0.0023% |
75 | Uniswap V2 (Ethereum) | 0XBA11D00C5F74255F56A5E366F4F77F5A186D7F55-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $0.9962 0.0004100 Eth | $152.37 152.952 0XBA11D00C5F74255F56A5E366F4F77F5A186D7F55 | 0.0021% |
76 | TokoCrypto | BAND-BTC | $0.9995 0.0004119 Eth | $142.20 142.268 BAND | 0.0019% |
77 | ProBit Global | BAND-USDT | $1.052 0.0004338 Eth | $119.38 113.532 BAND | 0.0015% |
78 | TokoCrypto | BAND-USDT | $0.9963 0.0004106 Eth | $97.62 97.989 BAND | 0.0013% |
79 | KuCoin | BAND-BTC | $0.9999 0.0004120 Eth | $93.54 93.553 BAND | 0.0013% |
80 | Pionex | BAND-BTC | $0.9943 0.0004095 Eth | $93.42 94.000 BAND | 0.0013% |
81 | Korbit | BAND-KRW | $0.9749 0.0004017 Eth | $74.89 74.954 BAND | 0.0010% |
82 | SakeSwap | 0XBA11D00C5F74255F56A5E366F4F77F5A186D7F55-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $1.025 0.0004161 Eth | $54.94 53.578 0XBA11D00C5F74255F56A5E366F4F77F5A186D7F55 | 0.0007% |
83 | Bittime | BAND-IDR | $1.001 0.0004126 Eth | $23.25 22.020 BAND | 0.0003% |
84 | BitBNS | BAND-INR | $0.9985 0.0004114 Eth | $20.40 20.430 BAND | 0.0003% |
85 | CEX.IO | BAND-USD | $0.999 0.0004116 Eth | $18.68 19.054 BAND | 0.0003% |
86 | Bitstamp | BAND-EUR | $1.29 0.0004858 Eth | $18.01 13.920 BAND | 0.0002% |
87 | CEX.IO | BAND-EUR | $1.003 0.0004133 Eth | $14.96 14.971 BAND | 0.0002% |
88 | CEX.IO | BAND-USDT | $0.9984 0.0004114 Eth | $14.73 14.971 BAND | 0.0002% |
89 | Nominex | BAND-BTC | $0.9998 0.0004120 Eth | $13.00 13.001 BAND | 0.0002% |
90 | Gate.io | BAND-ETH | $0.9844 0.0004056 Eth | $10.24 10.402 BAND | 0.0001% |
91 | OKX | BAND-USDC | $1.004 0.0004199 Eth | $9.35 9.313 BAND | 0.0001% |
92 | Indodax | BAND-IDR | $1.11 0.0004576 Eth | $9.02 8.134 BAND | 0.0001% |
93 | Poloniex | BAND-USDT | $0.8895 0.0003704 Eth | $4.31 4.846 BAND | 0.0001% |
94 | SpookySwap | 0X46E7628E8B4350B2716AB470EE0BA1FA9E76C6C5-0X21BE370D5312F44CB42CE377BC9B8A0CEF1A4C83 | $0.2931 0.0001198 Eth | $0.996 3.390 0X46E7628E8B4350B2716AB470EE0BA1FA9E76C6C5 | 0.0000% |
95 | HitBTC | BAND-USDT | $0.9994 0.0004119 Eth | $0.001 0.001 BAND | 0.0000% |
96 | HitBTC | BAND-BTC | $0.9895 0.0004079 Eth | $0.001 0.001 BAND | 0.0000% |
97 | Coinmetro | BAND-USD | $0.9941 0.0004100 Eth | $0.00 0.000 BAND | 0.0000% |
98 | Coinmetro | BAND-EUR | $0.996 0.0004105 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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