Feature Tip: Add private address tag to any address under My Name Tag !
Overview
Max Total Supply
10,000,000 COMP
Holders
219,349 ( 0.004%)
Market
Price
$96.60 @ 0.026503 ETH (+2.17%)
Onchain Market Cap
$966,000,000.00
Circulating Supply Market Cap
$854,365,850.00
Other Info
Token Contract (WITH 18 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | COMP-USDT | $96.56 0.0264178 Eth | $24,029,022.00 249,299.261 COMP | 16.9907% |
2 | WhiteBIT | COMP-USDT | $96.29 0.0264478 Eth | $15,267,053.00 158,553.386 COMP | 10.8060% |
3 | Websea | COMP-USDT | $96.27 0.0264633 Eth | $11,897,486.00 0.000 COMP | 0.0000% |
4 | Coinbase Exchange | COMP-USD | $95.80 0.0263442 Eth | $7,499,202.00 78,279.775 COMP | 5.3351% |
5 | Icrypex | COMP-USDT | $96.48 0.0265018 Eth | $7,134,712.00 73,952.995 COMP | 5.0402% |
6 | P2B | COMP-USDT | $95.63 0.0262978 Eth | $6,780,156.00 70,903.399 COMP | 4.8323% |
7 | Ourbit | COMP-USDT | $96.30 0.0264596 Eth | $6,746,832.00 70,030.027 COMP | 4.7728% |
8 | OKX | COMP-USDT | $96.32 0.0264524 Eth | $5,589,030.00 58,289.463 COMP | 3.9727% |
9 | Azbit | COMP-USDT | $96.16 0.0264121 Eth | $4,396,844.00 45,441.630 COMP | 3.0970% |
10 | HTX | COMP-USDT | $96.22 0.0264249 Eth | $4,254,447.00 44,011.533 COMP | 2.9996% |
11 | Toobit | COMP-USDT | $96.21 0.0264550 Eth | $4,114,974.00 42,560.332 COMP | 2.9007% |
12 | BYDFi | COMP-USDT | $96.52 0.0264117 Eth | $3,950,559.00 40,931.889 COMP | 2.7897% |
13 | Bitunix | COMP-USDT | $95.89 0.0263785 Eth | $2,950,770.00 30,775.949 COMP | 2.0975% |
14 | Biconomy.com | COMP-USDT | $96.22 0.0264503 Eth | $2,508,846.00 25,938.270 COMP | 1.7678% |
15 | Hotcoin | COMP-USDT | $95.98 0.0263880 Eth | $2,448,240.00 25,506.771 COMP | 1.7384% |
16 | Gate.io | COMP-USDT | $95.97 0.0263599 Eth | $2,293,409.00 23,572.322 COMP | 1.6065% |
17 | DigiFinex | COMP-USDT | $96.25 0.0264368 Eth | $2,245,628.00 23,331.293 COMP | 1.5901% |
18 | Phemex | COMP-USDT | $95.93 0.0263810 Eth | $2,179,438.00 22,718.125 COMP | 1.5483% |
19 | Bybit | COMP-USDT | $96.28 0.0264451 Eth | $1,886,455.00 19,593.102 COMP | 1.3353% |
20 | Bitrue | COMP-USDT | $96.23 0.0264605 Eth | $1,862,547.00 19,355.950 COMP | 1.3192% |
21 | Kraken | COMP-USD | $95.60 0.0262555 Eth | $1,662,854.00 17,393.873 COMP | 1.1855% |
22 | Deepcoin | COMP-USDT | $96.11 0.0263974 Eth | $1,508,517.00 51,230.951 COMP | 3.4916% |
23 | WEEX | COMP-USDT | $96.73 0.0264716 Eth | $1,502,101.00 15,528.414 COMP | 1.0583% |
24 | Bithumb | COMP-KRW | $95.31 0.0261765 Eth | $1,499,636.00 15,733.903 COMP | 1.0723% |
25 | CoinW | COMP-USDT | $96.09 0.0263561 Eth | $1,458,587.00 15,179.536 COMP | 1.0345% |
26 | BVOX | COMP-USDT | $95.97 0.0263920 Eth | $1,351,103.00 13,950.109 COMP | 0.9508% |
27 | BTSE | COMP-USDT | $96.15 0.0264092 Eth | $1,329,679.00 13,829.326 COMP | 0.9425% |
28 | BitDelta | COMP-USDT | $95.74 0.0263218 Eth | $1,184,129.00 12,354.855 COMP | 0.8420% |
29 | Koinpark | COMP-INR | $97.26 0.0266491 Eth | $1,037,239.00 10,664.073 COMP | 0.7268% |
30 | MEXC | COMP-USDT | $96.29 0.0264442 Eth | $1,016,425.00 10,556.206 COMP | 0.7194% |
31 | Trubit | COMP-USDT | $96.09 0.0263344 Eth | $976,837.00 10,300.799 COMP | 0.7020% |
32 | KuCoin | COMP-USDT | $95.87 0.0263324 Eth | $927,031.00 9,669.739 COMP | 0.6590% |
33 | FameEX | COMP-USDT | $96.63 0.0264741 Eth | $919,451.00 9,532.998 COMP | 0.6497% |
34 | LBank | COMP-USDT | $95.95 0.0263840 Eth | $891,318.00 9,289.813 COMP | 0.6331% |
35 | PointPay | COMP-USDT | $95.95 0.0263796 Eth | $857,824.00 8,866.550 COMP | 0.6043% |
36 | Bitget | COMP-USDT | $96.24 0.0264341 Eth | $848,313.00 8,750.369 COMP | 0.5964% |
37 | Pionex | COMP-USDT | $96.18 0.0264266 Eth | $689,364.00 7,135.856 COMP | 0.4863% |
38 | Dex-Trade | COMP-USDT | $95.98 0.0263725 Eth | $647,531.00 6,746.568 COMP | 0.4598% |
39 | Binance | COMP-BTC | $96.63 0.0264480 Eth | $625,350.00 6,503.779 COMP | 0.4433% |
40 | LATOKEN | COMP-BTC | $95.78 0.0263390 Eth | $577,845.00 6,032.968 COMP | 0.4112% |
41 | Hibt | COMP-USDT | $95.89 0.0263777 Eth | $575,470.00 6,014.162 COMP | 0.4099% |
42 | Nonkyc.io | COMP-USDT | $96.32 0.0264809 Eth | $539,115.00 5,609.959 COMP | 0.3823% |
43 | EarnBIT | COMP-USDT | $96.25 0.0264377 Eth | $522,294.00 5,437.024 COMP | 0.3706% |
44 | HitBTC | COMP-USDT | $96.23 0.0264517 Eth | $497,538.00 5,152.697 COMP | 0.3512% |
45 | FMFW.io | COMP-USDT | $96.20 0.0264537 Eth | $495,727.00 5,153.028 COMP | 0.3512% |
46 | Bitvavo | COMP-EUR | $96.61 0.0264409 Eth | $384,123.00 3,976.066 COMP | 0.2710% |
47 | Binance | COMP-TRY | $96.90 0.0266363 Eth | $362,992.00 3,704.662 COMP | 0.2525% |
48 | BingX | COMP-USDT | $96.28 0.0264451 Eth | $321,910.00 3,338.615 COMP | 0.2275% |
49 | KickEX | COMP-USDT | $95.90 0.0263660 Eth | $300,107.00 3,129.243 COMP | 0.2133% |
50 | BitMart | COMP-USDT | $95.75 0.0263205 Eth | $281,234.00 2,937.100 COMP | 0.2002% |
51 | Bitazza | COMP-USDT | $96.86 0.0265232 Eth | $280,347.00 2,902.647 COMP | 0.1978% |
52 | Bitfinex | COMP-USD | $96.37 0.0264688 Eth | $245,484.00 2,547.416 COMP | 0.1736% |
53 | CoinEx | COMP-USDT | $96.43 0.0263819 Eth | $229,353.00 2,398.187 COMP | 0.1634% |
54 | LATOKEN | COMP-USDT | $95.90 0.0263457 Eth | $214,954.00 2,241.442 COMP | 0.1528% |
55 | Tokenize | COMP-SGD | $96.07 0.0263603 Eth | $192,402.00 2,002.799 COMP | 0.1365% |
56 | Bitkub | COMP-THB | $96.58 0.0264865 Eth | $178,176.00 1,844.882 COMP | 0.1257% |
57 | Bit2Me | COMP-EUR | $96.39 0.0265056 Eth | $173,496.00 1,804.079 COMP | 0.1230% |
58 | Kraken | COMP-EUR | $96.41 0.0264778 Eth | $171,663.00 1,780.561 COMP | 0.1214% |
59 | tanX | COMP-USDT | $96.29 0.0264478 Eth | $162,798.00 1,667.298 COMP | 0.1136% |
60 | CoinTR | COMP-TRY | $96.79 0.0266154 Eth | $151,407.00 1,552.180 COMP | 0.1058% |
61 | AscendEX (BitMax) | COMP-USDT | $96.36 0.0264634 Eth | $142,054.00 1,474.248 COMP | 0.1005% |
62 | DeGate | 0XC00E94CB662C3520282E6F5717214004A7F26888-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48 | $95.28 0.0262100 Eth | $116,609.00 1,228.104 0XC00E94CB662C3520282E6F5717214004A7F26888 | 0.0837% |
63 | Koinpark | COMP-USDT | $95.95 0.0263717 Eth | $116,575.00 1,214.970 COMP | 0.0828% |
64 | QMall | COMP-USDT | $96.26 0.0264613 Eth | $104,763.00 1,083.049 COMP | 0.0738% |
65 | Sushiswap | 0XC00E94CB662C3520282E6F5717214004A7F26888-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $95.97 0.0263902 Eth | $101,132.00 1,058.664 0XC00E94CB662C3520282E6F5717214004A7F26888 | 0.0722% |
66 | Bitfinex | COMP-USDT | $95.48 0.0262243 Eth | $100,757.00 1,055.311 COMP | 0.0719% |
67 | Azbit | COMP-BTC | $96.04 0.0264084 Eth | $91,468.00 946.436 COMP | 0.0645% |
68 | Bitso | COMP-USD | $96.98 0.0265440 Eth | $90,976.00 938.079 COMP | 0.0639% |
69 | Uniswap V3 (Arbitrum One) | 0X354A6DA3FCDE098F8389CAD84B0182725C6C91DE-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1 | $93.98 0.0258440 Eth | $80,744.00 880.221 0X354A6DA3FCDE098F8389CAD84B0182725C6C91DE | 0.0600% |
70 | Kraken | COMP-XBT | $96.16 0.0264099 Eth | $58,133.00 604.536 COMP | 0.0412% |
71 | Coinbase Exchange | COMP-BTC | $96.26 0.0264720 Eth | $56,491.00 586.825 COMP | 0.0400% |
72 | BloFin | COMP-USDT | $96.40 0.0264871 Eth | $54,873.00 566.284 COMP | 0.0386% |
73 | OKX | COMP-USDC | $95.88 0.0263330 Eth | $50,529.00 530.380 COMP | 0.0361% |
74 | Bit2Me | COMP-USDC | $95.85 0.0263530 Eth | $49,615.00 521.021 COMP | 0.0355% |
75 | CoinTR | COMP-USDT | $96.42 0.0263835 Eth | $46,899.00 485.820 COMP | 0.0331% |
76 | Uniswap V3 (Base) | 0X9E1028F5F1D5EDE59748FFCEE5532509976840E0-0X4200000000000000000000000000000000000006 | $95.20 0.0261799 Eth | $43,903.00 467.131 0X9E1028F5F1D5EDE59748FFCEE5532509976840E0 | 0.0318% |
77 | Globe | COMP-USDT | $95.65 0.0263028 Eth | $37,367.00 391.842 COMP | 0.0267% |
78 | Tapbit | COMP-USDT | $96.56 0.0264219 Eth | $31,056.00 320.168 COMP | 0.0218% |
79 | Gemini | COMP-USD | $97.23 0.0267061 Eth | $30,494.00 313.631 COMP | 0.0214% |
80 | Uniswap V2 (Ethereum) | 0XC00E94CB662C3520282E6F5717214004A7F26888-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $94.81 0.0260664 Eth | $25,874.00 269.887 0XC00E94CB662C3520282E6F5717214004A7F26888 | 0.0184% |
81 | Nonkyc.io | COMP-BTC | $97.05 0.0265821 Eth | $25,263.00 260.698 COMP | 0.0178% |
82 | PancakeSwap V1 (BSC) | 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8-0X2170ED0880AC9A755FD29B2688956BD959F933F8 | $95.88 0.0263646 Eth | $20,754.00 219.050 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8 | 0.0149% |
83 | HashKey Global | COMP-USDT | $96.12 0.0264021 Eth | $15,515.62 160.415 COMP | 0.0109% |
84 | Uniswap V3 (Polygon) | 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619 | $94.21 0.0258751 Eth | $9,520.25 101.878 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C | 0.0069% |
85 | PancakeSwap (v2) | 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8-0X2170ED0880AC9A755FD29B2688956BD959F933F8 | $96.12 0.0264203 Eth | $9,397.11 99.021 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8 | 0.0067% |
86 | ApeSwap | 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C | $96.04 0.0263884 Eth | $7,933.89 84.152 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8 | 0.0057% |
87 | TokoCrypto | COMP-USDT | $96.49 0.0264054 Eth | $7,884.54 81.712 COMP | 0.0056% |
88 | WOO X | COMP-USDT | $96.66 0.0264536 Eth | $7,355.70 76.103 COMP | 0.0052% |
89 | Uniswap V3 (Arbitrum One) | 0X354A6DA3FCDE098F8389CAD84B0182725C6C91DE-0X912CE59144191C1204E64559FE8253A0E49E6548 | $94.23 0.0259208 Eth | $3,776.53 41.233 0X354A6DA3FCDE098F8389CAD84B0182725C6C91DE | 0.0028% |
90 | Aerodrome (Base) | 0X4621B7A9C75199271F773EBD9A499DBD165C3191-0X9E1028F5F1D5EDE59748FFCEE5532509976840E0 | $95.07 0.0261087 Eth | $3,568.62 3,614.627 0X4621B7A9C75199271F773EBD9A499DBD165C3191 | 0.2464% |
91 | Uniswap V3 (Polygon) | 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174 | $95.06 0.0261495 Eth | $3,114.76 33.646 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C | 0.0023% |
92 | PancakeSwap V3 (BSC) | 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8-0X2170ED0880AC9A755FD29B2688956BD959F933F8 | $96.10 0.0264210 Eth | $2,707.28 28.897 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8 | 0.0020% |
93 | Mercado Bitcoin | COMP-BRL | $96.58 0.0265523 Eth | $2,223.86 23.026 COMP | 0.0016% |
94 | CEX.IO | COMP-USDT | $96.17 0.0264239 Eth | $563.04 5.809 COMP | 0.0004% |
95 | TokoCrypto | COMP-BTC | $95.94 0.0263764 Eth | $314.96 3.283 COMP | 0.0002% |
96 | Sushiswap (Polygon POS) | 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619 | $94.27 0.0258801 Eth | $277.77 2.965 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C | 0.0002% |
97 | CEX.IO | COMP-USD | $96.19 0.0264287 Eth | $224.78 2.500 COMP | 0.0002% |
98 | Uniswap V3 (Polygon) | 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174 | $94.27 0.0258360 Eth | $199.33 2.120 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C | 0.0001% |
99 | CEX.IO | COMP-EUR | $96.60 0.0265415 Eth | $18.53 0.182 COMP | 0.0000% |
100 | Coinmetro | COMP-USDT | $95.76 0.0263322 Eth | $0.00 0.000 COMP | 0.0000% |
Contract Name:
Comp
Compiler Version
v0.5.16+commit.9c3226ce
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion, Audited
Contract Source Code (Solidity)Audit Report
/** *Submitted for verification at Etherscan.io on 2020-03-04 */ pragma solidity ^0.5.16; pragma experimental ABIEncoderV2; contract Comp { /// @notice EIP-20 token name for this token string public constant name = "Compound"; /// @notice EIP-20 token symbol for this token string public constant symbol = "COMP"; /// @notice EIP-20 token decimals for this token uint8 public constant decimals = 18; /// @notice Total number of tokens in circulation uint public constant totalSupply = 10000000e18; // 10 million Comp /// @notice Allowance amounts on behalf of others mapping (address => mapping (address => uint96)) internal allowances; /// @notice Official record of token balances for each account mapping (address => uint96) internal balances; /// @notice A record of each accounts delegate mapping (address => address) public delegates; /// @notice A checkpoint for marking number of votes from a given block struct Checkpoint { uint32 fromBlock; uint96 votes; } /// @notice A record of votes checkpoints for each account, by index mapping (address => mapping (uint32 => Checkpoint)) public checkpoints; /// @notice The number of checkpoints for each account mapping (address => uint32) public numCheckpoints; /// @notice The EIP-712 typehash for the contract's domain bytes32 public constant DOMAIN_TYPEHASH = keccak256("EIP712Domain(string name,uint256 chainId,address verifyingContract)"); /// @notice The EIP-712 typehash for the delegation struct used by the contract bytes32 public constant DELEGATION_TYPEHASH = keccak256("Delegation(address delegatee,uint256 nonce,uint256 expiry)"); /// @notice A record of states for signing / validating signatures mapping (address => uint) public nonces; /// @notice An event thats emitted when an account changes its delegate event DelegateChanged(address indexed delegator, address indexed fromDelegate, address indexed toDelegate); /// @notice An event thats emitted when a delegate account's vote balance changes event DelegateVotesChanged(address indexed delegate, uint previousBalance, uint newBalance); /// @notice The standard EIP-20 transfer event event Transfer(address indexed from, address indexed to, uint256 amount); /// @notice The standard EIP-20 approval event event Approval(address indexed owner, address indexed spender, uint256 amount); /** * @notice Construct a new Comp token * @param account The initial account to grant all the tokens */ constructor(address account) public { balances[account] = uint96(totalSupply); emit Transfer(address(0), account, totalSupply); } /** * @notice Get the number of tokens `spender` is approved to spend on behalf of `account` * @param account The address of the account holding the funds * @param spender The address of the account spending the funds * @return The number of tokens approved */ function allowance(address account, address spender) external view returns (uint) { return allowances[account][spender]; } /** * @notice Approve `spender` to transfer up to `amount` from `src` * @dev This will overwrite the approval amount for `spender` * and is subject to issues noted [here](https://eips.ethereum.org/EIPS/eip-20#approve) * @param spender The address of the account which may transfer tokens * @param rawAmount The number of tokens that are approved (2^256-1 means infinite) * @return Whether or not the approval succeeded */ function approve(address spender, uint rawAmount) external returns (bool) { uint96 amount; if (rawAmount == uint(-1)) { amount = uint96(-1); } else { amount = safe96(rawAmount, "Comp::approve: amount exceeds 96 bits"); } allowances[msg.sender][spender] = amount; emit Approval(msg.sender, spender, amount); return true; } /** * @notice Get the number of tokens held by the `account` * @param account The address of the account to get the balance of * @return The number of tokens held */ function balanceOf(address account) external view returns (uint) { return balances[account]; } /** * @notice Transfer `amount` tokens from `msg.sender` to `dst` * @param dst The address of the destination account * @param rawAmount The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transfer(address dst, uint rawAmount) external returns (bool) { uint96 amount = safe96(rawAmount, "Comp::transfer: amount exceeds 96 bits"); _transferTokens(msg.sender, dst, amount); return true; } /** * @notice Transfer `amount` tokens from `src` to `dst` * @param src The address of the source account * @param dst The address of the destination account * @param rawAmount The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transferFrom(address src, address dst, uint rawAmount) external returns (bool) { address spender = msg.sender; uint96 spenderAllowance = allowances[src][spender]; uint96 amount = safe96(rawAmount, "Comp::approve: amount exceeds 96 bits"); if (spender != src && spenderAllowance != uint96(-1)) { uint96 newAllowance = sub96(spenderAllowance, amount, "Comp::transferFrom: transfer amount exceeds spender allowance"); allowances[src][spender] = newAllowance; emit Approval(src, spender, newAllowance); } _transferTokens(src, dst, amount); return true; } /** * @notice Delegate votes from `msg.sender` to `delegatee` * @param delegatee The address to delegate votes to */ function delegate(address delegatee) public { return _delegate(msg.sender, delegatee); } /** * @notice Delegates votes from signatory to `delegatee` * @param delegatee The address to delegate votes to * @param nonce The contract state required to match the signature * @param expiry The time at which to expire the signature * @param v The recovery byte of the signature * @param r Half of the ECDSA signature pair * @param s Half of the ECDSA signature pair */ function delegateBySig(address delegatee, uint nonce, uint expiry, uint8 v, bytes32 r, bytes32 s) public { bytes32 domainSeparator = keccak256(abi.encode(DOMAIN_TYPEHASH, keccak256(bytes(name)), getChainId(), address(this))); bytes32 structHash = keccak256(abi.encode(DELEGATION_TYPEHASH, delegatee, nonce, expiry)); bytes32 digest = keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash)); address signatory = ecrecover(digest, v, r, s); require(signatory != address(0), "Comp::delegateBySig: invalid signature"); require(nonce == nonces[signatory]++, "Comp::delegateBySig: invalid nonce"); require(now <= expiry, "Comp::delegateBySig: signature expired"); return _delegate(signatory, delegatee); } /** * @notice Gets the current votes balance for `account` * @param account The address to get votes balance * @return The number of current votes for `account` */ function getCurrentVotes(address account) external view returns (uint96) { uint32 nCheckpoints = numCheckpoints[account]; return nCheckpoints > 0 ? checkpoints[account][nCheckpoints - 1].votes : 0; } /** * @notice Determine the prior number of votes for an account as of a block number * @dev Block number must be a finalized block or else this function will revert to prevent misinformation. * @param account The address of the account to check * @param blockNumber The block number to get the vote balance at * @return The number of votes the account had as of the given block */ function getPriorVotes(address account, uint blockNumber) public view returns (uint96) { require(blockNumber < block.number, "Comp::getPriorVotes: not yet determined"); uint32 nCheckpoints = numCheckpoints[account]; if (nCheckpoints == 0) { return 0; } // First check most recent balance if (checkpoints[account][nCheckpoints - 1].fromBlock <= blockNumber) { return checkpoints[account][nCheckpoints - 1].votes; } // Next check implicit zero balance if (checkpoints[account][0].fromBlock > blockNumber) { return 0; } uint32 lower = 0; uint32 upper = nCheckpoints - 1; while (upper > lower) { uint32 center = upper - (upper - lower) / 2; // ceil, avoiding overflow Checkpoint memory cp = checkpoints[account][center]; if (cp.fromBlock == blockNumber) { return cp.votes; } else if (cp.fromBlock < blockNumber) { lower = center; } else { upper = center - 1; } } return checkpoints[account][lower].votes; } function _delegate(address delegator, address delegatee) internal { address currentDelegate = delegates[delegator]; uint96 delegatorBalance = balances[delegator]; delegates[delegator] = delegatee; emit DelegateChanged(delegator, currentDelegate, delegatee); _moveDelegates(currentDelegate, delegatee, delegatorBalance); } function _transferTokens(address src, address dst, uint96 amount) internal { require(src != address(0), "Comp::_transferTokens: cannot transfer from the zero address"); require(dst != address(0), "Comp::_transferTokens: cannot transfer to the zero address"); balances[src] = sub96(balances[src], amount, "Comp::_transferTokens: transfer amount exceeds balance"); balances[dst] = add96(balances[dst], amount, "Comp::_transferTokens: transfer amount overflows"); emit Transfer(src, dst, amount); _moveDelegates(delegates[src], delegates[dst], amount); } function _moveDelegates(address srcRep, address dstRep, uint96 amount) internal { if (srcRep != dstRep && amount > 0) { if (srcRep != address(0)) { uint32 srcRepNum = numCheckpoints[srcRep]; uint96 srcRepOld = srcRepNum > 0 ? checkpoints[srcRep][srcRepNum - 1].votes : 0; uint96 srcRepNew = sub96(srcRepOld, amount, "Comp::_moveVotes: vote amount underflows"); _writeCheckpoint(srcRep, srcRepNum, srcRepOld, srcRepNew); } if (dstRep != address(0)) { uint32 dstRepNum = numCheckpoints[dstRep]; uint96 dstRepOld = dstRepNum > 0 ? checkpoints[dstRep][dstRepNum - 1].votes : 0; uint96 dstRepNew = add96(dstRepOld, amount, "Comp::_moveVotes: vote amount overflows"); _writeCheckpoint(dstRep, dstRepNum, dstRepOld, dstRepNew); } } } function _writeCheckpoint(address delegatee, uint32 nCheckpoints, uint96 oldVotes, uint96 newVotes) internal { uint32 blockNumber = safe32(block.number, "Comp::_writeCheckpoint: block number exceeds 32 bits"); if (nCheckpoints > 0 && checkpoints[delegatee][nCheckpoints - 1].fromBlock == blockNumber) { checkpoints[delegatee][nCheckpoints - 1].votes = newVotes; } else { checkpoints[delegatee][nCheckpoints] = Checkpoint(blockNumber, newVotes); numCheckpoints[delegatee] = nCheckpoints + 1; } emit DelegateVotesChanged(delegatee, oldVotes, newVotes); } function safe32(uint n, string memory errorMessage) internal pure returns (uint32) { require(n < 2**32, errorMessage); return uint32(n); } function safe96(uint n, string memory errorMessage) internal pure returns (uint96) { require(n < 2**96, errorMessage); return uint96(n); } function add96(uint96 a, uint96 b, string memory errorMessage) internal pure returns (uint96) { uint96 c = a + b; require(c >= a, errorMessage); return c; } function sub96(uint96 a, uint96 b, string memory errorMessage) internal pure returns (uint96) { require(b <= a, errorMessage); return a - b; } function getChainId() internal pure returns (uint) { uint256 chainId; assembly { chainId := chainid() } return chainId; } }
Contract Security Audit
- Open Zeppelin- Feb 25th, 2020 - Security Audit Report
[{"inputs":[{"internalType":"address","name":"account","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"delegator","type":"address"},{"indexed":true,"internalType":"address","name":"fromDelegate","type":"address"},{"indexed":true,"internalType":"address","name":"toDelegate","type":"address"}],"name":"DelegateChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"delegate","type":"address"},{"indexed":false,"internalType":"uint256","name":"previousBalance","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"newBalance","type":"uint256"}],"name":"DelegateVotesChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Transfer","type":"event"},{"constant":true,"inputs":[],"name":"DELEGATION_TYPEHASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"DOMAIN_TYPEHASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"rawAmount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint32","name":"","type":"uint32"}],"name":"checkpoints","outputs":[{"internalType":"uint32","name":"fromBlock","type":"uint32"},{"internalType":"uint96","name":"votes","type":"uint96"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"delegatee","type":"address"}],"name":"delegate","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"delegatee","type":"address"},{"internalType":"uint256","name":"nonce","type":"uint256"},{"internalType":"uint256","name":"expiry","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"delegateBySig","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"delegates","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"getCurrentVotes","outputs":[{"internalType":"uint96","name":"","type":"uint96"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"blockNumber","type":"uint256"}],"name":"getPriorVotes","outputs":[{"internalType":"uint96","name":"","type":"uint96"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"nonces","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"numCheckpoints","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"dst","type":"address"},{"internalType":"uint256","name":"rawAmount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"src","type":"address"},{"internalType":"address","name":"dst","type":"address"},{"internalType":"uint256","name":"rawAmount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
0000000000000000000000001449e0687810bddd356ae6dd87789244a46d9adb
-----Decoded View---------------
Arg [0] : account (address): 0x1449e0687810BdDD356ae6Dd87789244A46d9AdB
-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000001449e0687810bddd356ae6dd87789244a46d9adb
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