Overview
Max Total Supply
10,000,000 COMP
Holders
219,499 ( -0.042%)
Market
Price
$115.03 @ 0.030285 ETH (-9.25%)
Onchain Market Cap
$1,150,300,000.00
Circulating Supply Market Cap
$1,017,256,515.00
Other Info
Token Contract (WITH 18 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | COMP-USDT | $114.57 0.0300634 Eth | $83,188,252.00 713,924.167 COMP | 18.4559% |
2 | BTCC | COMP-USDT | $114.86 0.0300530 Eth | $60,957,640.00 520,531.857 COMP | 13.4565% |
3 | Websea | COMP-USDT | $115.22 0.0301774 Eth | $43,538,229.00 0.000 COMP | 0.0000% |
4 | Icrypex | COMP-USDT | $114.57 0.0299606 Eth | $36,209,704.00 316,041.864 COMP | 8.1701% |
5 | P2B | COMP-USDT | $115.29 0.0301028 Eth | $26,540,702.00 230,213.407 COMP | 5.9513% |
6 | WhiteBIT | COMP-USDT | $114.73 0.0300189 Eth | $23,716,345.00 206,721.105 COMP | 5.3440% |
7 | Ourbit | COMP-USDT | $115.43 0.0301278 Eth | $21,053,746.00 179,883.848 COMP | 4.6502% |
8 | Coinbase Exchange | COMP-USD | $115.02 0.0301243 Eth | $16,737,906.00 145,521.699 COMP | 3.7619% |
9 | Toobit | COMP-USDT | $115.16 0.0301654 Eth | $14,008,379.00 120,103.611 COMP | 3.1048% |
10 | BYDFi | COMP-USDT | $114.84 0.0300113 Eth | $12,823,901.00 111,664.927 COMP | 2.8867% |
11 | OKX | COMP-USDT | $114.45 0.0300348 Eth | $12,803,262.00 109,596.215 COMP | 2.8332% |
12 | Bitunix | COMP-USDT | $115.16 0.0301152 Eth | $9,653,281.00 83,807.634 COMP | 2.1665% |
13 | Hotcoin | COMP-USDT | $114.80 0.0301035 Eth | $9,482,469.00 82,600.984 COMP | 2.1353% |
14 | DigiFinex | COMP-USDT | $114.62 0.0300765 Eth | $7,513,789.00 65,553.288 COMP | 1.6946% |
15 | Biconomy.com | COMP-USDT | $115.15 0.0301280 Eth | $6,770,288.00 58,042.450 COMP | 1.5005% |
16 | Bitrue | COMP-USDT | $114.82 0.0301003 Eth | $6,698,774.00 58,341.460 COMP | 1.5082% |
17 | Uniswap V3 (Ethereum) | 0XC00E94CB662C3520282E6F5717214004A7F26888-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $114.63 0.0300267 Eth | $6,389,515.00 55,223.271 0XC00E94CB662C3520282E6F5717214004A7F26888 | 1.4276% |
18 | Bybit | COMP-USDT | $114.78 0.0301186 Eth | $5,760,239.00 49,272.513 COMP | 1.2738% |
19 | Phemex | COMP-USDT | $115.23 0.0300891 Eth | $5,079,052.00 44,075.626 COMP | 1.1394% |
20 | HTX | COMP-USDT | $114.30 0.0299925 Eth | $4,312,784.00 37,171.818 COMP | 0.9609% |
21 | Binance | COMP-TRY | $115.53 0.0302569 Eth | $3,960,003.00 34,027.742 COMP | 0.8797% |
22 | Azbit | COMP-USDT | $114.93 0.0301051 Eth | $3,890,361.00 33,487.670 COMP | 0.8657% |
23 | BTSE | COMP-USDT | $114.83 0.0301292 Eth | $3,875,233.00 33,746.817 COMP | 0.8724% |
24 | Gate.io | COMP-USDT | $114.49 0.0300221 Eth | $3,636,986.00 31,154.901 COMP | 0.8054% |
25 | Deepcoin | COMP-USDT | $115.07 0.0301418 Eth | $3,584,083.00 31,611.228 COMP | 0.8172% |
26 | Koinpark | COMP-INR | $115.05 0.0302394 Eth | $3,578,908.00 31,107.866 COMP | 0.8042% |
27 | FameEX | COMP-USDT | $114.70 0.0299747 Eth | $3,286,433.00 28,163.593 COMP | 0.7281% |
28 | CoinW | COMP-USDT | $114.80 0.0301035 Eth | $3,236,877.00 28,196.163 COMP | 0.7289% |
29 | Uniswap V3 (Ethereum) | 0XC00E94CB662C3520282E6F5717214004A7F26888-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $114.63 0.0300267 Eth | $3,001,861.00 25,843.915 0XC00E94CB662C3520282E6F5717214004A7F26888 | 0.6681% |
30 | PointPay | COMP-USDT | $115.24 0.0301864 Eth | $2,852,589.00 24,510.842 COMP | 0.6336% |
31 | Bithumb | COMP-KRW | $114.75 0.0301106 Eth | $2,552,755.00 22,246.032 COMP | 0.5751% |
32 | Pionex | COMP-USDT | $114.81 0.0301061 Eth | $2,352,106.00 20,174.579 COMP | 0.5215% |
33 | Binance | COMP-BTC | $114.77 0.0300414 Eth | $2,302,689.00 20,436.768 COMP | 0.5283% |
34 | Kraken | COMP-USD | $115.28 0.0302494 Eth | $2,226,909.00 19,317.393 COMP | 0.4994% |
35 | Dex-Trade | COMP-USDT | $114.55 0.0300582 Eth | $2,054,099.00 17,931.738 COMP | 0.4636% |
36 | KuCoin | COMP-USDT | $114.73 0.0301054 Eth | $1,986,726.00 17,316.361 COMP | 0.4477% |
37 | MEXC | COMP-USDT | $114.96 0.0300085 Eth | $1,974,783.00 17,177.349 COMP | 0.4441% |
38 | BVOX | COMP-USDT | $114.96 0.0300373 Eth | $1,699,370.00 14,610.012 COMP | 0.3777% |
39 | BitDelta | COMP-USDT | $115.19 0.0301733 Eth | $1,580,696.00 13,450.709 COMP | 0.3477% |
40 | WEEX | COMP-USDT | $115.53 0.0301540 Eth | $1,504,137.00 13,019.458 COMP | 0.3366% |
41 | CoinEx | COMP-USDT | $115.08 0.0300498 Eth | $1,463,875.00 12,512.330 COMP | 0.3235% |
42 | Hibt | COMP-USDT | $115.10 0.0301497 Eth | $1,289,710.00 11,022.662 COMP | 0.2850% |
43 | Bitvavo | COMP-EUR | $114.65 0.0300273 Eth | $1,239,002.00 10,806.652 COMP | 0.2794% |
44 | LATOKEN | COMP-BTC | $114.86 0.0300668 Eth | $1,231,437.00 10,720.893 COMP | 0.2771% |
45 | EarnBIT | COMP-USDT | $115.87 0.0304052 Eth | $1,221,073.00 10,353.391 COMP | 0.2676% |
46 | LBank | COMP-USDT | $115.10 0.0301295 Eth | $1,219,881.00 10,598.330 COMP | 0.2740% |
47 | Trubit | COMP-USDT | $114.59 0.0300688 Eth | $1,182,222.00 10,105.812 COMP | 0.2612% |
48 | Bitget | COMP-USDT | $114.63 0.0300792 Eth | $1,045,253.00 8,881.949 COMP | 0.2296% |
49 | HitBTC | COMP-USDT | $114.45 0.0300329 Eth | $1,021,964.00 8,777.514 COMP | 0.2269% |
50 | FMFW.io | COMP-USDT | $115.38 0.0301482 Eth | $1,012,550.00 8,775.570 COMP | 0.2269% |
51 | Nonkyc.io | COMP-USDT | $115.69 0.0303002 Eth | $963,790.00 8,267.279 COMP | 0.2137% |
52 | BingX | COMP-USDT | $114.51 0.0300478 Eth | $939,451.00 8,066.969 COMP | 0.2085% |
53 | Upbit | COMP-BTC | $114.05 0.0299263 Eth | $799,775.00 7,012.582 COMP | 0.1813% |
54 | LATOKEN | COMP-USDT | $115.22 0.0301596 Eth | $659,851.00 5,727.002 COMP | 0.1481% |
55 | BitMart | COMP-USDT | $115.18 0.0301662 Eth | $600,860.00 5,216.712 COMP | 0.1349% |
56 | Bitso | COMP-USD | $114.80 0.0300508 Eth | $457,689.00 3,986.766 COMP | 0.1031% |
57 | P2B | COMP-USD | $115.03 0.0300356 Eth | $439,772.00 3,823.106 COMP | 0.0988% |
58 | Bit2Me | COMP-EUR | $114.84 0.0301367 Eth | $436,498.00 3,638.348 COMP | 0.0941% |
59 | Kraken | COMP-EUR | $114.46 0.0300346 Eth | $424,941.00 3,712.529 COMP | 0.0960% |
60 | Coinbase Exchange | COMP-BTC | $115.29 0.0301961 Eth | $415,102.00 3,600.380 COMP | 0.0931% |
61 | Koinpark | COMP-USDT | $115.16 0.0301306 Eth | $410,800.00 3,567.237 COMP | 0.0922% |
62 | QMall | COMP-USDT | $115.23 0.0301850 Eth | $363,643.00 3,123.734 COMP | 0.0808% |
63 | Crypto.com Exchange | COMP-USD | $114.88 0.0301160 Eth | $358,483.00 3,120.500 COMP | 0.0807% |
64 | KickEX | COMP-USDT | $115.04 0.0301129 Eth | $349,530.00 3,038.351 COMP | 0.0785% |
65 | tanX | COMP-USDT | $115.08 0.0301391 Eth | $320,426.00 2,740.037 COMP | 0.0708% |
66 | Bitfinex | COMP-USD | $114.66 0.0300867 Eth | $306,989.00 2,677.385 COMP | 0.0692% |
67 | Gemini | COMP-USD | $115.56 0.0303250 Eth | $298,831.00 2,585.934 COMP | 0.0668% |
68 | Crypto.com Exchange | COMP-USDT | $113.87 0.0298511 Eth | $293,230.00 2,575.150 COMP | 0.0666% |
69 | Bitazza | COMP-USDT | $115.08 0.0300363 Eth | $286,477.00 2,459.305 COMP | 0.0636% |
70 | Tokenize | COMP-SGD | $113.77 0.0299307 Eth | $226,830.00 1,993.721 COMP | 0.0515% |
71 | Sushiswap | 0XC00E94CB662C3520282E6F5717214004A7F26888-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $115.32 0.0302019 Eth | $217,515.00 1,873.687 0XC00E94CB662C3520282E6F5717214004A7F26888 | 0.0484% |
72 | BloFin | COMP-USDT | $115.14 0.0300843 Eth | $209,513.00 1,797.225 COMP | 0.0465% |
73 | TokoCrypto | COMP-USDT | $114.09 0.0300281 Eth | $194,699.00 1,706.505 COMP | 0.0441% |
74 | CoinCatch | COMP-USDT | $115.20 0.0301759 Eth | $188,166.00 1,618.669 COMP | 0.0418% |
75 | Kraken | COMP-XBT | $114.75 0.0301101 Eth | $176,190.00 1,535.433 COMP | 0.0397% |
76 | CoinTR | COMP-TRY | $115.04 0.0301661 Eth | $166,382.00 1,430.859 COMP | 0.0370% |
77 | WOO X | COMP-USDT | $114.89 0.0300892 Eth | $147,322.00 1,282.331 COMP | 0.0332% |
78 | AscendEX (BitMax) | COMP-USDT | $115.43 0.0302601 Eth | $145,892.00 1,263.905 COMP | 0.0327% |
79 | Azbit | COMP-BTC | $115.27 0.0301948 Eth | $77,292.00 692.762 COMP | 0.0179% |
80 | OKX | COMP-USDC | $114.71 0.0300797 Eth | $76,757.00 661.063 COMP | 0.0171% |
81 | Bit2Me | COMP-USDC | $114.81 0.0300740 Eth | $75,288.00 647.842 COMP | 0.0167% |
82 | PancakeSwap V1 (BSC) | 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8-0X2170ED0880AC9A755FD29B2688956BD959F933F8 | $114.04 0.0298715 Eth | $65,814.00 580.048 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8 | 0.0150% |
83 | Dex-Trade | COMP-BTC | $113.94 0.0300132 Eth | $62,777.00 550.970 COMP | 0.0142% |
84 | Globe | COMP-USDT | $113.98 0.0300251 Eth | $56,432.00 480.815 COMP | 0.0124% |
85 | Uniswap V2 (Ethereum) | 0XC00E94CB662C3520282E6F5717214004A7F26888-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $115.54 0.0301576 Eth | $56,360.00 482.417 0XC00E94CB662C3520282E6F5717214004A7F26888 | 0.0125% |
86 | CoinTR | COMP-USDT | $114.96 0.0301092 Eth | $53,388.00 458.993 COMP | 0.0119% |
87 | DeGate | 0XC00E94CB662C3520282E6F5717214004A7F26888-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48 | $114.98 0.0302606 Eth | $52,729.00 447.500 0XC00E94CB662C3520282E6F5717214004A7F26888 | 0.0116% |
88 | PancakeSwap (v2) | 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8-0X2170ED0880AC9A755FD29B2688956BD959F933F8 | $114.19 0.0299058 Eth | $33,367.00 294.414 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8 | 0.0076% |
89 | Nonkyc.io | COMP-BTC | $114.36 0.0299895 Eth | $29,489.00 264.511 COMP | 0.0068% |
90 | ApeSwap | 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C | $114.22 0.0299134 Eth | $29,424.00 256.743 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8 | 0.0066% |
91 | Uniswap V3 (Polygon) | 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619 | $114.72 0.0299579 Eth | $15,850.34 139.142 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C | 0.0036% |
92 | Uniswap V3 (Polygon) | 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270 | $113.18 0.0295561 Eth | $13,780.04 122.900 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C | 0.0032% |
93 | Mercado Bitcoin | COMP-BRL | $115.46 0.0302967 Eth | $10,740.18 93.021 COMP | 0.0024% |
94 | PancakeSwap V3 (BSC) | 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8-0X2170ED0880AC9A755FD29B2688956BD959F933F8 | $114.87 0.0300843 Eth | $8,166.73 72.099 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8 | 0.0019% |
95 | HashKey Global | COMP-USDT | $115.58 0.0303299 Eth | $7,940.40 67.349 COMP | 0.0017% |
96 | ProBit Global | COMP-USDT | $115.92 0.0305000 Eth | $6,538.28 56.405 COMP | 0.0015% |
97 | CEX.IO | COMP-USD | $114.47 0.0300878 Eth | $5,416.32 45.810 COMP | 0.0012% |
98 | CEX.IO | COMP-USDT | $114.56 0.0300608 Eth | $3,245.82 26.935 COMP | 0.0007% |
99 | Sushiswap (Polygon POS) | 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619 | $114.98 0.0301704 Eth | $457.85 4.008 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C | 0.0001% |
100 | Coinmetro | COMP-USDT | $114.66 0.0300866 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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