Feature Tip: Add private address tag to any address under My Name Tag !
Overview
Max Total Supply
10,000,000 COMP
Holders
219,458 ( -0.055%)
Market
Price
$112.27 @ 0.028794 ETH (+13.84%)
Onchain Market Cap
$1,122,700,000.00
Circulating Supply Market Cap
$993,721,830.00
Other Info
Token Contract (WITH 18 Decimals)
Balance
0.007013317282888936 COMPValue
$0.79 ( ~0.000202614024381989 Eth) [0.0000%]Loading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | COMP-USDT | $112.26 0.0291121 Eth | $172,883,376.00 1,425,443.010 COMP | 20.5696% |
2 | Icrypex | COMP-USDT | $112.13 0.0289764 Eth | $102,116,111.00 910,673.498 COMP | 13.1413% |
3 | Websea | COMP-USDT | $110.78 0.0287068 Eth | $92,986,890.00 0.000 COMP | 0.0000% |
4 | P2B | COMP-USDT | $112.88 0.0290964 Eth | $50,958,290.00 451,432.900 COMP | 6.5143% |
5 | WhiteBIT | COMP-USDT | $112.78 0.0291103 Eth | $44,276,096.00 392,591.818 COMP | 5.6652% |
6 | Ourbit | COMP-USDT | $112.04 0.0289882 Eth | $41,658,248.00 345,338.173 COMP | 4.9833% |
7 | Coinbase Exchange | COMP-USD | $112.94 0.0291116 Eth | $38,914,239.00 344,556.744 COMP | 4.9721% |
8 | OKX | COMP-USDT | $112.97 0.0291182 Eth | $27,278,239.00 226,556.628 COMP | 3.2693% |
9 | Toobit | COMP-USDT | $112.24 0.0290207 Eth | $26,625,603.00 220,369.678 COMP | 3.1800% |
10 | BYDFi | COMP-USDT | $111.79 0.0289619 Eth | $23,888,518.00 213,695.495 COMP | 3.0837% |
11 | Bitunix | COMP-USDT | $112.93 0.0290982 Eth | $19,089,676.00 169,099.950 COMP | 2.4402% |
12 | Uniswap V3 (Ethereum) | 0XC00E94CB662C3520282E6F5717214004A7F26888-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $111.25 0.0286750 Eth | $16,936,050.00 139,403.508 0XC00E94CB662C3520282E6F5717214004A7F26888 | 2.0116% |
13 | DigiFinex | COMP-USDT | $112.98 0.0291208 Eth | $14,883,753.00 131,742.993 COMP | 1.9011% |
14 | Biconomy.com | COMP-USDT | $111.51 0.0289021 Eth | $14,645,072.00 120,403.090 COMP | 1.7375% |
15 | Binance | COMP-TRY | $112.80 0.0290761 Eth | $13,408,111.00 107,292.104 COMP | 1.5483% |
16 | Currency.com | COMP-USD | $111.51 0.0288968 Eth | $12,645,200.00 113,404.776 COMP | 1.6365% |
17 | Bitrue | COMP-USDT | $111.36 0.0288632 Eth | $11,667,894.00 104,779.580 COMP | 1.5120% |
18 | Bybit | COMP-USDT | $113.06 0.0291414 Eth | $11,144,377.00 93,729.922 COMP | 1.3526% |
19 | Gate.io | COMP-USDT | $112.12 0.0289422 Eth | $10,830,615.00 85,495.919 COMP | 1.2337% |
20 | Uniswap V3 (Ethereum) | 0XC00E94CB662C3520282E6F5717214004A7F26888-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $111.25 0.0286750 Eth | $9,152,713.00 74,907.169 0XC00E94CB662C3520282E6F5717214004A7F26888 | 1.0809% |
21 | Bithumb | COMP-KRW | $112.03 0.0288761 Eth | $8,968,031.00 80,052.646 COMP | 1.1552% |
22 | KuCoin | COMP-USDT | $112.78 0.0290706 Eth | $8,087,869.00 71,713.006 COMP | 1.0348% |
23 | Binance | COMP-BTC | $111.92 0.0290035 Eth | $7,330,582.00 57,604.239 COMP | 0.8312% |
24 | Hotcoin | COMP-USDT | $112.90 0.0291016 Eth | $6,836,197.00 60,550.242 COMP | 0.8738% |
25 | FameEX | COMP-USDT | $111.71 0.0289693 Eth | $6,777,831.00 55,862.955 COMP | 0.8061% |
26 | PointPay | COMP-USDT | $112.06 0.0290033 Eth | $6,712,867.00 55,214.816 COMP | 0.7968% |
27 | Phemex | COMP-USDT | $112.43 0.0290534 Eth | $6,162,374.00 54,810.488 COMP | 0.7909% |
28 | HTX | COMP-USDT | $112.78 0.0290595 Eth | $6,150,082.00 50,884.514 COMP | 0.7343% |
29 | MEXC | COMP-USDT | $112.67 0.0290849 Eth | $5,165,494.00 45,845.799 COMP | 0.6616% |
30 | Bitvavo | COMP-EUR | $111.72 0.0288404 Eth | $5,048,633.00 45,188.503 COMP | 0.6521% |
31 | Pionex | COMP-USDT | $112.31 0.0290388 Eth | $4,995,258.00 41,245.385 COMP | 0.5952% |
32 | Kraken | COMP-USD | $112.80 0.0290755 Eth | $4,855,153.00 43,042.136 COMP | 0.6211% |
33 | BTSE | COMP-USDT | $112.49 0.0290694 Eth | $4,840,877.00 43,032.859 COMP | 0.6210% |
34 | CoinW | COMP-USDT | $115.36 0.0298303 Eth | $4,265,248.00 36,973.041 COMP | 0.5335% |
35 | Deepcoin | COMP-USDT | $111.97 0.0289800 Eth | $4,094,973.00 38,835.894 COMP | 0.5604% |
36 | Dex-Trade | COMP-USDT | $112.80 0.0291180 Eth | $3,900,751.00 34,581.443 COMP | 0.4990% |
37 | bitcastle | COMP-USDT | $112.53 0.0290457 Eth | $3,367,476.00 28,820.366 COMP | 0.4159% |
38 | LATOKEN | COMP-BTC | $111.92 0.0290019 Eth | $2,895,479.00 25,871.923 COMP | 0.3733% |
39 | CoinEx | COMP-USDT | $113.06 0.0291317 Eth | $2,842,699.00 23,670.245 COMP | 0.3416% |
40 | BitDelta | COMP-USDT | $111.73 0.0289179 Eth | $2,725,163.00 22,871.716 COMP | 0.3300% |
41 | Hibt | COMP-USDT | $112.24 0.0290054 Eth | $2,719,384.00 22,617.731 COMP | 0.3264% |
42 | EarnBIT | COMP-USDT | $112.53 0.0290051 Eth | $2,638,301.00 21,852.933 COMP | 0.3153% |
43 | BingX | COMP-USDT | $112.82 0.0290809 Eth | $2,531,974.00 21,230.677 COMP | 0.3064% |
44 | Azbit | COMP-USDT | $111.79 0.0289238 Eth | $2,254,985.00 19,734.390 COMP | 0.2848% |
45 | BVOX | COMP-USDT | $115.13 0.0297780 Eth | $1,846,138.00 15,811.361 COMP | 0.2282% |
46 | Upbit | COMP-BTC | $111.35 0.0287028 Eth | $1,756,949.00 15,778.026 COMP | 0.2277% |
47 | Bitget | COMP-USDT | $113.08 0.0291466 Eth | $1,659,931.00 14,128.954 COMP | 0.2039% |
48 | Trubit | COMP-USDT | $112.18 0.0290053 Eth | $1,586,810.00 13,240.156 COMP | 0.1911% |
49 | WEEX | COMP-USDT | $115.13 0.0297497 Eth | $1,500,671.00 13,034.778 COMP | 0.1881% |
50 | LBank | COMP-USDT | $112.33 0.0291151 Eth | $1,442,545.00 12,842.286 COMP | 0.1853% |
51 | Kraken | COMP-EUR | $111.20 0.0286622 Eth | $1,292,229.00 11,621.092 COMP | 0.1677% |
52 | Coinbase Exchange | COMP-BTC | $112.07 0.0288864 Eth | $1,216,128.00 10,851.827 COMP | 0.1566% |
53 | HitBTC | COMP-USDT | $112.27 0.0290132 Eth | $1,203,675.00 10,156.674 COMP | 0.1466% |
54 | Bit2Me | COMP-EUR | $111.23 0.0287898 Eth | $1,197,773.00 11,388.671 COMP | 0.1643% |
55 | BitMart | COMP-USDT | $112.11 0.0289699 Eth | $1,150,508.00 10,262.546 COMP | 0.1481% |
56 | FMFW.io | COMP-USDT | $112.18 0.0290047 Eth | $1,138,420.00 10,148.158 COMP | 0.1464% |
57 | LATOKEN | COMP-USDT | $112.15 0.0290628 Eth | $887,677.00 7,915.044 COMP | 0.1142% |
58 | Bitso | COMP-USD | $114.85 0.0297020 Eth | $838,924.00 7,304.583 COMP | 0.1054% |
59 | Nonkyc.io | COMP-USDT | $112.01 0.0289445 Eth | $837,620.00 7,143.936 COMP | 0.1031% |
60 | QMall | COMP-USDT | $111.74 0.0289209 Eth | $805,946.00 6,624.669 COMP | 0.0956% |
61 | P2B | COMP-USD | $114.86 0.0296727 Eth | $797,883.00 6,946.566 COMP | 0.1002% |
62 | Bitkub | COMP-THB | $114.42 0.0296234 Eth | $796,400.00 6,960.242 COMP | 0.1004% |
63 | Crypto.com Exchange | COMP-USD | $111.45 0.0287272 Eth | $715,816.00 6,422.810 COMP | 0.0927% |
64 | Kraken | COMP-XBT | $112.38 0.0289659 Eth | $569,083.00 5,064.134 COMP | 0.0731% |
65 | Bitfinex | COMP-USD | $111.49 0.0287378 Eth | $550,930.00 4,941.518 COMP | 0.0713% |
66 | BloFin | COMP-USDT | $112.27 0.0290131 Eth | $497,269.00 4,062.580 COMP | 0.0586% |
67 | Gemini | COMP-USD | $111.97 0.0288508 Eth | $387,919.00 3,464.493 COMP | 0.0500% |
68 | Crypto.com Exchange | COMP-USDT | $111.52 0.0287450 Eth | $381,269.00 3,418.900 COMP | 0.0493% |
69 | KickEX | COMP-USDT | $112.46 0.0290777 Eth | $344,998.00 3,067.714 COMP | 0.0443% |
70 | Bitazza | COMP-USDT | $115.18 0.0297821 Eth | $343,993.00 2,968.065 COMP | 0.0428% |
71 | TokoCrypto | COMP-USDT | $111.51 0.0288935 Eth | $291,047.00 2,610.034 COMP | 0.0377% |
72 | tanX | COMP-USDT | $111.46 0.0288493 Eth | $267,223.00 2,344.714 COMP | 0.0338% |
73 | Bitstamp | COMP-USD | $114.50 0.0295546 Eth | $234,573.00 2,048.676 COMP | 0.0296% |
74 | Uniswap V3 (Arbitrum One) | 0X354A6DA3FCDE098F8389CAD84B0182725C6C91DE-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1 | $110.19 0.0285103 Eth | $224,618.00 1,966.495 0X354A6DA3FCDE098F8389CAD84B0182725C6C91DE | 0.0284% |
75 | HashKey Global | COMP-USDT | $112.63 0.0290708 Eth | $214,244.00 1,747.311 COMP | 0.0252% |
76 | Tokenize | COMP-SGD | $112.55 0.0290534 Eth | $201,419.00 1,789.614 COMP | 0.0258% |
77 | CoinCatch | COMP-USDT | $112.03 0.0289956 Eth | $196,243.00 1,674.496 COMP | 0.0242% |
78 | Binance US | COMP-USDT | $110.18 0.0283995 Eth | $193,753.00 1,758.555 COMP | 0.0254% |
79 | OKX | COMP-USDC | $112.60 0.0290232 Eth | $186,622.00 1,534.074 COMP | 0.0221% |
80 | Bit2Me | COMP-USDC | $112.45 0.0291395 Eth | $182,982.00 1,506.780 COMP | 0.0217% |
81 | CEX.IO | COMP-USD | $112.64 0.0290769 Eth | $175,937.00 1,348.380 COMP | 0.0195% |
82 | WOO X | COMP-USDT | $112.72 0.0290948 Eth | $164,367.00 1,458.201 COMP | 0.0210% |
83 | Foxbit | COMP-BRL | $110.72 0.0285791 Eth | $160,790.00 1,309.884 COMP | 0.0189% |
84 | PancakeSwap V1 (BSC) | 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8-0X2170ED0880AC9A755FD29B2688956BD959F933F8 | $112.19 0.0289607 Eth | $159,442.00 1,317.732 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8 | 0.0190% |
85 | Dex-Trade | COMP-BTC | $115.55 0.0298472 Eth | $155,062.00 1,341.925 COMP | 0.0194% |
86 | Globe | COMP-USDT | $115.38 0.0298378 Eth | $122,000.00 1,048.019 COMP | 0.0151% |
87 | CoinDCX | COMP-INR | $112.63 0.0290716 Eth | $117,964.00 0.000 COMP | 0.0000% |
88 | DeGate | 0XC00E94CB662C3520282E6F5717214004A7F26888-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48 | $112.53 0.0290477 Eth | $91,297.00 784.214 0XC00E94CB662C3520282E6F5717214004A7F26888 | 0.0113% |
89 | PancakeSwap (v2) | 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8-0X2170ED0880AC9A755FD29B2688956BD959F933F8 | $112.14 0.0289955 Eth | $85,667.00 704.007 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8 | 0.0102% |
90 | ApeSwap | 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C | $112.02 0.0289951 Eth | $71,005.00 608.107 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8 | 0.0088% |
91 | DeFi Swap | 0XC00E94CB662C3520282E6F5717214004A7F26888-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $113.35 0.0292179 Eth | $62,061.00 507.796 0XC00E94CB662C3520282E6F5717214004A7F26888 | 0.0073% |
92 | Azbit | COMP-BTC | $111.37 0.0288270 Eth | $47,126.00 393.138 COMP | 0.0057% |
93 | Nonkyc.io | COMP-BTC | $114.55 0.0296342 Eth | $37,961.00 307.565 COMP | 0.0044% |
94 | Uniswap V3 (Polygon) | 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270 | $115.23 0.0298575 Eth | $36,372.00 307.348 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C | 0.0044% |
95 | Uniswap V3 (Polygon) | 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619 | $115.25 0.0298190 Eth | $30,892.00 253.051 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C | 0.0037% |
96 | Mercado Bitcoin | COMP-BRL | $109.75 0.0283311 Eth | $30,837.00 280.977 COMP | 0.0041% |
97 | PancakeSwap V3 (BSC) | 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8-0X2170ED0880AC9A755FD29B2688956BD959F933F8 | $110.74 0.0285838 Eth | $19,847.05 163.557 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8 | 0.0024% |
98 | Uniswap V3 (Arbitrum One) | 0X354A6DA3FCDE098F8389CAD84B0182725C6C91DE-0X912CE59144191C1204E64559FE8253A0E49E6548 | $110.06 0.0285145 Eth | $13,614.27 115.117 0X354A6DA3FCDE098F8389CAD84B0182725C6C91DE | 0.0017% |
99 | Sushiswap (Polygon POS) | 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619 | $113.21 0.0293527 Eth | $1,375.78 11.658 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C | 0.0002% |
100 | Uniswap V3 (Polygon) | 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174 | $115.30 0.0298626 Eth | $827.86 8.728 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C | 0.0001% |
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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