Overview
Max Total Supply
10,000,000 COMP
Holders
220,131 (0.00%)
Market
Price
$47.97 @ 0.017895 ETH (-4.25%)
Onchain Market Cap
$479,700,000.00
Circulating Supply Market Cap
$421,584,830.00
Other Info
Token Contract (WITH 18 Decimals)
Balance
0.139380795933503481 COMPValue
$6.69 ( ~0.00249570183306486 Eth) [0.0000%]Loading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | HashKey Global | COMP-USDT | $48.26 0.0180021 Eth | $5,206,583.00 103,694.486 COMP | 24.8231% |
2 | Azbit | COMP-USDT | $48.25 0.0179983 Eth | $1,850,675.00 37,923.840 COMP | 9.0785% |
3 | Binance | COMP-USDT | $48.31 0.0180124 Eth | $1,512,907.00 30,911.495 COMP | 7.3998% |
4 | HTX | COMP-USDT | $48.27 0.0179974 Eth | $1,479,007.00 30,257.846 COMP | 7.2433% |
5 | BloFin | COMP-USDT | $48.05 0.0179345 Eth | $1,213,608.00 24,862.857 COMP | 5.9518% |
6 | Biconomy.com | COMP-USDT | $48.31 0.0180200 Eth | $1,209,435.00 24,782.470 COMP | 5.9326% |
7 | WhiteBIT | COMP-USDT | $48.17 0.0179736 Eth | $961,514.00 19,961.693 COMP | 4.7786% |
8 | P2B | COMP-USDT | $48.06 0.0179382 Eth | $726,989.00 15,125.494 COMP | 3.6208% |
9 | Trubit | COMP-USDT | $48.26 0.0180072 Eth | $670,089.00 13,782.592 COMP | 3.2994% |
10 | BVOX | COMP-USDT | $48.23 0.0179960 Eth | $597,255.00 12,238.561 COMP | 2.9297% |
11 | Toobit | COMP-USDT | $48.04 0.0179309 Eth | $441,365.00 9,033.827 COMP | 2.1626% |
12 | Icrypex | COMP-USDT | $48.26 0.0180013 Eth | $429,090.00 8,890.585 COMP | 2.1283% |
13 | Coinbase Exchange | COMP-USD | $48.24 0.0179929 Eth | $381,968.00 7,918.068 COMP | 1.8955% |
14 | OKX | COMP-USDT | $48.25 0.0179984 Eth | $303,403.00 6,197.623 COMP | 1.4836% |
15 | LBank | COMP-USDT | $48.28 0.0180071 Eth | $284,940.00 5,901.815 COMP | 1.4128% |
16 | Bitazza | COMP-USDT | $48.24 0.0180034 Eth | $274,641.00 5,629.204 COMP | 1.3476% |
17 | BYDFi | COMP-USDT | $48.06 0.0179640 Eth | $257,726.00 5,362.260 COMP | 1.2837% |
18 | Websea | COMP-USDT | $48.28 0.0180077 Eth | $256,096.00 0.000 COMP | 0.0000% |
19 | Hotcoin | COMP-USDT | $48.10 0.0179512 Eth | $188,715.00 3,923.513 COMP | 0.9392% |
20 | Tapbit | COMP-USDT | $48.24 0.0179922 Eth | $152,450.00 3,126.322 COMP | 0.7484% |
21 | Phemex | COMP-USDT | $48.21 0.0179890 Eth | $148,435.00 3,079.193 COMP | 0.7371% |
22 | DigiFinex | COMP-USDT | $48.27 0.0180058 Eth | $143,635.00 2,975.490 COMP | 0.7123% |
23 | AscendEX (BitMax) | COMP-USDT | $48.20 0.0179797 Eth | $115,929.00 2,405.041 COMP | 0.5757% |
24 | Deepcoin | COMP-USDT | $48.28 0.0180088 Eth | $114,619.00 2,416.118 COMP | 0.5784% |
25 | tanX | COMP-USDT | $47.90 0.0179238 Eth | $113,893.00 2,331.785 COMP | 0.5582% |
26 | CoinW | COMP-USDT | $48.02 0.0179233 Eth | $113,459.00 2,362.559 COMP | 0.5656% |
27 | Bybit | COMP-USDT | $48.19 0.0179760 Eth | $108,303.00 2,211.296 COMP | 0.5294% |
28 | BitMart | COMP-USDT | $48.22 0.0179956 Eth | $101,776.00 2,110.774 COMP | 0.5053% |
29 | FameEX | COMP-USDT | $48.15 0.0179661 Eth | $98,793.00 2,024.748 COMP | 0.4847% |
30 | BitDelta | COMP-USDT | $48.27 0.0180058 Eth | $97,544.00 1,999.855 COMP | 0.4787% |
31 | WEEX | COMP-USDT | $48.06 0.0179384 Eth | $74,662.00 1,533.090 COMP | 0.3670% |
32 | Pionex | COMP-USDT | $48.06 0.0179363 Eth | $68,600.00 1,406.046 COMP | 0.3366% |
33 | Bitunix | COMP-USDT | $48.29 0.0180125 Eth | $65,144.00 1,349.202 COMP | 0.3230% |
34 | Bitget | COMP-USDT | $48.28 0.0180012 Eth | $61,377.00 1,260.038 COMP | 0.3016% |
35 | Nonkyc.io | COMP-USDT | $48.21 0.0179911 Eth | $53,807.00 1,103.492 COMP | 0.2642% |
36 | Dex-Trade | COMP-USDT | $48.32 0.0180221 Eth | $50,152.00 1,037.921 COMP | 0.2485% |
37 | Nonkyc.io | COMP-BTC | $48.37 0.0180524 Eth | $44,751.00 912.708 COMP | 0.2185% |
38 | Azbit | COMP-BTC | $48.30 0.0180178 Eth | $38,791.00 793.361 COMP | 0.1899% |
39 | Binance | COMP-BTC | $48.02 0.0179430 Eth | $37,650.00 767.060 COMP | 0.1836% |
40 | Globe | COMP-USDT | $48.24 0.0179924 Eth | $31,467.00 647.570 COMP | 0.1550% |
41 | BTSE | COMP-USDT | $48.22 0.0179871 Eth | $30,375.00 629.892 COMP | 0.1508% |
42 | EarnBIT | COMP-USDT | $48.17 0.0179777 Eth | $30,248.00 619.890 COMP | 0.1484% |
43 | Bithumb | COMP-KRW | $48.46 0.0180751 Eth | $29,866.00 616.278 COMP | 0.1475% |
44 | LATOKEN | COMP-BTC | $48.03 0.0179185 Eth | $24,787.00 516.039 COMP | 0.1235% |
45 | PointPay | COMP-USDT | $48.28 0.0180077 Eth | $23,109.00 473.653 COMP | 0.1134% |
46 | Binance | COMP-TRY | $48.06 0.0179765 Eth | $19,006.77 382.028 COMP | 0.0915% |
47 | CoinEx | COMP-USDT | $48.10 0.0179512 Eth | $17,851.64 366.610 COMP | 0.0878% |
48 | MEXC | COMP-USDT | $48.15 0.0179602 Eth | $15,690.89 325.906 COMP | 0.0780% |
49 | Coinbase Exchange | COMP-BTC | $47.98 0.0178967 Eth | $15,541.74 323.900 COMP | 0.0775% |
50 | DeGate | 0XC00E94CB662C3520282E6F5717214004A7F26888-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48 | $48.13 0.0179650 Eth | $14,656.09 300.780 0XC00E94CB662C3520282E6F5717214004A7F26888 | 0.0720% |
51 | Fairdesk | COMP-USDT | $48.09 0.0179493 Eth | $12,937.12 269.000 COMP | 0.0644% |
52 | Bitkub | COMP-THB | $48.10 0.0179355 Eth | $12,501.10 259.898 COMP | 0.0622% |
53 | LATOKEN | COMP-USDT | $48.12 0.0179494 Eth | $11,858.27 246.450 COMP | 0.0590% |
54 | KuCoin | COMP-USDT | $48.10 0.0179424 Eth | $11,605.84 241.272 COMP | 0.0578% |
55 | Kraken | COMP-USD | $47.73 0.0178034 Eth | $11,070.81 231.947 COMP | 0.0555% |
56 | Gate.io | COMP-USDT | $48.14 0.0179572 Eth | $10,917.42 222.524 COMP | 0.0533% |
57 | Sushiswap | 0XC00E94CB662C3520282E6F5717214004A7F26888-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $48.18 0.0179705 Eth | $10,666.04 217.326 0XC00E94CB662C3520282E6F5717214004A7F26888 | 0.0520% |
58 | P2B | COMP-USD | $48.07 0.0179405 Eth | $9,843.34 204.771 COMP | 0.0490% |
59 | Uniswap V3 (Arbitrum One) | 0X354A6DA3FCDE098F8389CAD84B0182725C6C91DE-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1 | $47.60 0.0177545 Eth | $9,339.84 192.484 0X354A6DA3FCDE098F8389CAD84B0182725C6C91DE | 0.0461% |
60 | Bit2Me | COMP-EUR | $48.36 0.0180389 Eth | $8,604.33 175.006 COMP | 0.0419% |
61 | Kraken | COMP-EUR | $48.36 0.0180389 Eth | $8,597.19 177.770 COMP | 0.0426% |
62 | Crypto.com Exchange | COMP-USD | $48.29 0.0180108 Eth | $8,545.66 176.980 COMP | 0.0424% |
63 | Cryptal | COMP-USD | $48.25 0.0179959 Eth | $8,375.27 171.658 COMP | 0.0411% |
64 | Uniswap V3 (Ethereum) | 0XC00E94CB662C3520282E6F5717214004A7F26888-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $48.21 0.0179891 Eth | $7,891.47 161.181 0XC00E94CB662C3520282E6F5717214004A7F26888 | 0.0386% |
65 | HashKey Exchange | COMP-USD | $48.20 0.0179855 Eth | $7,703.62 157.628 COMP | 0.0377% |
66 | Koinpark | COMP-USDT | $48.28 0.0180088 Eth | $7,380.83 152.865 COMP | 0.0366% |
67 | QMall | COMP-USDT | $48.15 0.0179654 Eth | $6,675.20 136.823 COMP | 0.0328% |
68 | Crypto.com Exchange | COMP-USDT | $48.27 0.0180060 Eth | $6,510.13 134.860 COMP | 0.0323% |
69 | Bitlo | COMP-TRY | $48.27 0.0180036 Eth | $6,188.66 126.623 COMP | 0.0303% |
70 | Bitvavo | COMP-EUR | $47.89 0.0178637 Eth | $4,781.66 99.837 COMP | 0.0239% |
71 | Aerodrome (Base) | 0X4621B7A9C75199271F773EBD9A499DBD165C3191-0X9E1028F5F1D5EDE59748FFCEE5532509976840E0 | $48.06 0.0179237 Eth | $4,457.26 4,541.754 0X4621B7A9C75199271F773EBD9A499DBD165C3191 | 1.0872% |
72 | Bitso | COMP-USD | $48.25 0.0179899 Eth | $3,762.60 77.988 COMP | 0.0187% |
73 | Uniswap V3 (Base) | 0X9E1028F5F1D5EDE59748FFCEE5532509976840E0-0X4200000000000000000000000000000000000006 | $47.95 0.0178809 Eth | $3,341.24 68.555 0X9E1028F5F1D5EDE59748FFCEE5532509976840E0 | 0.0164% |
74 | Korbit | COMP-KRW | $48.20 0.0179710 Eth | $3,172.32 65.374 COMP | 0.0156% |
75 | Gemini | COMP-USD | $48.01 0.0179019 Eth | $2,698.40 56.205 COMP | 0.0135% |
76 | Mercado Bitcoin | COMP-BRL | $48.35 0.0180323 Eth | $2,688.15 55.602 COMP | 0.0133% |
77 | Uniswap V2 (Ethereum) | 0XC00E94CB662C3520282E6F5717214004A7F26888-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $48.18 0.0179728 Eth | $2,474.14 50.818 0XC00E94CB662C3520282E6F5717214004A7F26888 | 0.0122% |
78 | PancakeSwap V1 (BSC) | 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8-0X2170ED0880AC9A755FD29B2688956BD959F933F8 | $48.18 0.0179713 Eth | $1,938.55 39.522 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8 | 0.0095% |
79 | Bitfinex | COMP-USD | $48.32 0.0180179 Eth | $1,872.71 38.756 COMP | 0.0093% |
80 | Bitazza | COMP-THB | $47.89 0.0178733 Eth | $1,655.68 33.763 COMP | 0.0081% |
81 | PancakeSwap (v2) | 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8-0X2170ED0880AC9A755FD29B2688956BD959F933F8 | $48.42 0.0180530 Eth | $1,172.65 24.025 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8 | 0.0058% |
82 | Dex-Trade | COMP-BTC | $47.98 0.0178935 Eth | $1,147.09 23.910 COMP | 0.0057% |
83 | P2B | COMP-BTC | $48.01 0.0179184 Eth | $1,117.55 23.277 COMP | 0.0056% |
84 | Bitfinex | COMP-USDT | $48.15 0.0179542 Eth | $809.20 16.806 COMP | 0.0040% |
85 | Kraken | COMP-XBT | $48.24 0.0179932 Eth | $659.57 13.673 COMP | 0.0033% |
86 | DeFi Swap | 0XC00E94CB662C3520282E6F5717214004A7F26888-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $48.69 0.0181614 Eth | $603.77 12.355 0XC00E94CB662C3520282E6F5717214004A7F26888 | 0.0030% |
87 | ApeSwap | 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C | $48.18 0.0179798 Eth | $564.40 11.603 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8 | 0.0028% |
88 | WOO X | COMP-USDT | $48.13 0.0179624 Eth | $211.71 4.399 COMP | 0.0011% |
89 | Coins.ph | COMP-PHP | $48.28 0.0180159 Eth | $196.39 4.018 COMP | 0.0010% |
90 | OKX | COMP-USDC | $47.70 0.0177926 Eth | $132.20 2.770 COMP | 0.0007% |
91 | Bittime | COMP-IDR | $48.22 0.0179921 Eth | $106.18 2.171 COMP | 0.0005% |
92 | TokoCrypto | COMP-USDT | $48.22 0.0179927 Eth | $57.57 1.194 COMP | 0.0003% |
93 | CEX.IO | COMP-USD | $48.34 0.0180295 Eth | $32.91 0.661 COMP | 0.0002% |
94 | CEX.IO | COMP-USDT | $48.14 0.0179680 Eth | $21.81 0.452 COMP | 0.0001% |
95 | CEX.IO | COMP-EUR | $48.53 0.0181000 Eth | $20.71 0.417 COMP | 0.0001% |
96 | CEX.IO | COMP-USDC | $48.29 0.0180217 Eth | $18.50 0.383 COMP | 0.0001% |
97 | Coinmetro | COMP-EUR | $48.32 0.0180217 Eth | $0.00 0.000 COMP | 0.0000% |
98 | Coinmetro | COMP-USDT | $48.31 0.0180175 Eth | $0.00 0.000 COMP | 0.0000% |
99 | Coinmetro | COMP-USD | $48.30 0.0180136 Eth | $0.00 0.000 COMP | 0.0000% |
100 | Coinmetro | COMP-USDC | $48.29 0.0180121 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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