Overview
Max Total Supply
10,000,000 COMP
Holders
219,334 ( -0.001%)
Market
Price
$116.36 @ 0.029191 ETH (-0.72%)
Onchain Market Cap
$1,163,600,000.00
Circulating Supply Market Cap
$1,030,477,018.00
Other Info
Token Contract (WITH 18 Decimals)
Balance
0.007013317282888936 COMPValue
$0.82 ( ~0.000205710249867824 Eth) [0.0000%]Loading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | BTCC | COMP-USDT | $116.57 0.0292616 Eth | $31,774,045.00 266,306.785 COMP | 15.2184% |
2 | Binance | COMP-USDT | $116.94 0.0293551 Eth | $31,139,796.00 260,780.297 COMP | 14.9026% |
3 | WhiteBIT | COMP-USDT | $116.55 0.0292531 Eth | $16,556,433.00 142,059.527 COMP | 8.1181% |
4 | Websea | COMP-USDT | $116.57 0.0292586 Eth | $16,458,904.00 0.000 COMP | 0.0000% |
5 | P2B | COMP-USDT | $116.58 0.0292641 Eth | $12,961,792.00 111,184.918 COMP | 6.3538% |
6 | Icrypex | COMP-USDT | $116.89 0.0293496 Eth | $12,144,033.00 103,893.009 COMP | 5.9371% |
7 | Coinbase Exchange | COMP-USD | $116.81 0.0293181 Eth | $11,083,777.00 94,887.230 COMP | 5.4224% |
8 | Ourbit | COMP-USDT | $116.40 0.0292208 Eth | $8,148,096.00 68,249.007 COMP | 3.9002% |
9 | OKX | COMP-USDT | $116.69 0.0292993 Eth | $6,184,600.00 51,662.688 COMP | 2.9523% |
10 | Toobit | COMP-USDT | $116.67 0.0292837 Eth | $5,640,653.00 47,236.251 COMP | 2.6994% |
11 | Azbit | COMP-USDT | $116.52 0.0292474 Eth | $5,301,451.00 44,589.950 COMP | 2.5481% |
12 | BYDFi | COMP-USDT | $116.33 0.0292034 Eth | $5,040,529.00 43,330.287 COMP | 2.4762% |
13 | Bitunix | COMP-USDT | $116.83 0.0293274 Eth | $3,669,130.00 31,412.437 COMP | 1.7951% |
14 | Uniswap V3 (Ethereum) | 0XC00E94CB662C3520282E6F5717214004A7F26888-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $116.28 0.0291883 Eth | $3,606,361.00 30,031.538 0XC00E94CB662C3520282E6F5717214004A7F26888 | 1.7162% |
15 | Deepcoin | COMP-USDT | $116.61 0.0292736 Eth | $3,577,945.00 29,445.945 COMP | 1.6827% |
16 | Biconomy.com | COMP-USDT | $116.87 0.0293050 Eth | $3,431,082.00 28,752.810 COMP | 1.6431% |
17 | HTX | COMP-USDT | $116.31 0.0291928 Eth | $3,413,091.00 28,688.182 COMP | 1.6394% |
18 | DigiFinex | COMP-USDT | $116.82 0.0293249 Eth | $2,908,944.00 24,902.138 COMP | 1.4231% |
19 | Phemex | COMP-USDT | $116.10 0.0291500 Eth | $2,600,136.00 22,394.799 COMP | 1.2798% |
20 | Bitrue | COMP-USDT | $116.25 0.0291993 Eth | $2,568,637.00 22,096.280 COMP | 1.2627% |
21 | Bybit | COMP-USDT | $116.47 0.0292395 Eth | $2,514,885.00 21,010.075 COMP | 1.2006% |
22 | Uniswap V3 (Ethereum) | 0XC00E94CB662C3520282E6F5717214004A7F26888-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $116.43 0.0292256 Eth | $1,799,778.00 14,918.368 0XC00E94CB662C3520282E6F5717214004A7F26888 | 0.8525% |
23 | Gate.io | COMP-USDT | $116.39 0.0292194 Eth | $1,633,446.00 13,742.050 COMP | 0.7853% |
24 | CoinW | COMP-USDT | $116.72 0.0292885 Eth | $1,626,385.00 13,934.639 COMP | 0.7963% |
25 | WEEX | COMP-USDT | $116.09 0.0291652 Eth | $1,504,652.00 12,960.863 COMP | 0.7407% |
26 | Hotcoin | COMP-USDT | $116.69 0.0292915 Eth | $1,490,347.00 12,772.240 COMP | 0.7299% |
27 | BVOX | COMP-USDT | $116.48 0.0292409 Eth | $1,483,422.00 12,463.973 COMP | 0.7123% |
28 | BTSE | COMP-USDT | $116.47 0.0292263 Eth | $1,474,581.00 12,660.423 COMP | 0.7235% |
29 | Koinpark | COMP-INR | $117.60 0.0295223 Eth | $1,314,135.00 11,174.845 COMP | 0.6386% |
30 | FameEX | COMP-USDT | $116.51 0.0292484 Eth | $1,200,332.00 10,051.683 COMP | 0.5744% |
31 | PointPay | COMP-USDT | $116.72 0.0293017 Eth | $1,190,262.00 9,969.004 COMP | 0.5697% |
32 | LBank | COMP-USDT | $116.48 0.0292425 Eth | $1,142,232.00 9,806.236 COMP | 0.5604% |
33 | Binance | COMP-TRY | $116.61 0.0292767 Eth | $1,100,068.00 9,137.820 COMP | 0.5222% |
34 | Dex-Trade | COMP-USDT | $116.64 0.0292792 Eth | $1,023,385.00 8,773.969 COMP | 0.5014% |
35 | Pionex | COMP-USDT | $116.34 0.0292003 Eth | $903,078.00 7,562.751 COMP | 0.4322% |
36 | MEXC | COMP-USDT | $116.61 0.0292714 Eth | $872,793.00 7,484.950 COMP | 0.4277% |
37 | BitDelta | COMP-USDT | $116.42 0.0292258 Eth | $835,743.00 7,042.402 COMP | 0.4024% |
38 | Kraken | COMP-USD | $116.40 0.0292152 Eth | $733,067.00 6,297.827 COMP | 0.3599% |
39 | KuCoin | COMP-USDT | $116.63 0.0292732 Eth | $646,078.00 5,539.753 COMP | 0.3166% |
40 | Hibt | COMP-USDT | $116.63 0.0292764 Eth | $620,416.00 5,182.055 COMP | 0.2961% |
41 | Bitget | COMP-USDT | $116.73 0.0293048 Eth | $609,487.00 5,094.677 COMP | 0.2911% |
42 | Binance | COMP-BTC | $115.94 0.0291000 Eth | $592,564.00 4,973.109 COMP | 0.2842% |
43 | EarnBIT | COMP-USDT | $116.26 0.0291857 Eth | $582,853.00 4,873.517 COMP | 0.2785% |
44 | Nonkyc.io | COMP-USDT | $116.17 0.0291627 Eth | $579,235.00 4,858.414 COMP | 0.2776% |
45 | Trubit | COMP-USDT | $116.38 0.0292382 Eth | $557,732.00 4,681.032 COMP | 0.2675% |
46 | HitBTC | COMP-USDT | $116.37 0.0292123 Eth | $475,923.00 3,998.847 COMP | 0.2285% |
47 | FMFW.io | COMP-USDT | $117.40 0.0294493 Eth | $474,836.00 4,044.435 COMP | 0.2311% |
48 | BingX | COMP-USDT | $116.92 0.0293519 Eth | $379,000.00 3,174.105 COMP | 0.1814% |
49 | LATOKEN | COMP-BTC | $116.14 0.0291582 Eth | $363,824.00 3,132.512 COMP | 0.1790% |
50 | KickEX | COMP-USDT | $116.58 0.0292804 Eth | $363,631.00 3,119.189 COMP | 0.1782% |
51 | CoinEx | COMP-USDT | $116.32 0.0291971 Eth | $348,583.00 2,920.455 COMP | 0.1669% |
52 | tanX | COMP-USDT | $116.53 0.0292486 Eth | $332,200.00 2,792.090 COMP | 0.1596% |
53 | Bitvavo | COMP-EUR | $116.40 0.0292209 Eth | $321,156.00 2,759.019 COMP | 0.1577% |
54 | BitMart | COMP-USDT | $116.58 0.0292621 Eth | $303,134.00 2,600.286 COMP | 0.1486% |
55 | Bitazza | COMP-USDT | $116.25 0.0291832 Eth | $291,231.00 2,447.093 COMP | 0.1398% |
56 | LATOKEN | COMP-USDT | $116.51 0.0292492 Eth | $274,618.00 2,357.094 COMP | 0.1347% |
57 | WOO X | COMP-USDT | $116.43 0.0292299 Eth | $237,338.00 2,038.456 COMP | 0.1165% |
58 | P2B | COMP-USD | $116.47 0.0292368 Eth | $217,377.00 1,866.377 COMP | 0.1067% |
59 | CoinTR | COMP-TRY | $117.07 0.0293764 Eth | $198,001.00 1,656.185 COMP | 0.0946% |
60 | Tokenize | COMP-SGD | $116.10 0.0291455 Eth | $172,379.00 1,484.794 COMP | 0.0849% |
61 | Kraken | COMP-EUR | $117.35 0.0294545 Eth | $165,393.00 1,409.356 COMP | 0.0805% |
62 | Bit2Me | COMP-EUR | $117.35 0.0294590 Eth | $165,320.00 1,397.970 COMP | 0.0799% |
63 | Coinbase Exchange | COMP-BTC | $117.03 0.0293736 Eth | $161,054.00 1,376.159 COMP | 0.0786% |
64 | Koinpark | COMP-USDT | $116.17 0.0291576 Eth | $150,235.00 1,293.286 COMP | 0.0739% |
65 | QMall | COMP-USDT | $116.48 0.0292409 Eth | $147,115.00 1,231.638 COMP | 0.0704% |
66 | AscendEX (BitMax) | COMP-USDT | $116.92 0.0293460 Eth | $136,165.00 1,164.637 COMP | 0.0666% |
67 | BloFin | COMP-USDT | $116.51 0.0292484 Eth | $131,153.00 1,101.819 COMP | 0.0630% |
68 | Bitso | COMP-USD | $116.64 0.0292815 Eth | $123,352.00 1,057.523 COMP | 0.0604% |
69 | Azbit | COMP-BTC | $116.10 0.0291457 Eth | $114,049.00 958.912 COMP | 0.0548% |
70 | Sushiswap | 0XC00E94CB662C3520282E6F5717214004A7F26888-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $117.00 0.0293689 Eth | $105,803.00 880.944 0XC00E94CB662C3520282E6F5717214004A7F26888 | 0.0503% |
71 | Bitkub | COMP-THB | $116.67 0.0292887 Eth | $104,256.00 893.587 COMP | 0.0511% |
72 | bitcastle | COMP-USDT | $116.61 0.0292434 Eth | $92,109.00 771.249 COMP | 0.0441% |
73 | Crypto.com Exchange | COMP-USD | $117.20 0.0294205 Eth | $91,115.00 777.460 COMP | 0.0444% |
74 | Bitfinex | COMP-USD | $117.15 0.0294090 Eth | $85,581.00 730.525 COMP | 0.0417% |
75 | Kraken | COMP-XBT | $116.23 0.0291736 Eth | $75,642.00 650.772 COMP | 0.0372% |
76 | Crypto.com Exchange | COMP-USDT | $117.05 0.0293847 Eth | $70,988.00 606.460 COMP | 0.0347% |
77 | Gemini | COMP-USD | $117.25 0.0294400 Eth | $53,654.00 457.603 COMP | 0.0262% |
78 | OKX | COMP-USDC | $118.42 0.0297328 Eth | $53,412.00 444.767 COMP | 0.0254% |
79 | CoinTR | COMP-USDT | $116.75 0.0293065 Eth | $50,247.00 422.477 COMP | 0.0241% |
80 | TokoCrypto | COMP-USDT | $116.93 0.0293596 Eth | $49,664.00 424.731 COMP | 0.0243% |
81 | Foxbit | COMP-BRL | $117.71 0.0295525 Eth | $45,868.00 378.209 COMP | 0.0216% |
82 | Bitstamp | COMP-USD | $118.00 0.0296283 Eth | $40,412.00 342.474 COMP | 0.0196% |
83 | PancakeSwap V1 (BSC) | 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8-0X2170ED0880AC9A755FD29B2688956BD959F933F8 | $115.89 0.0290905 Eth | $38,458.00 324.370 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8 | 0.0185% |
84 | DeGate | 0XC00E94CB662C3520282E6F5717214004A7F26888-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48 | $116.15 0.0291749 Eth | $31,389.00 263.358 0XC00E94CB662C3520282E6F5717214004A7F26888 | 0.0150% |
85 | Uniswap V2 (Ethereum) | 0XC00E94CB662C3520282E6F5717214004A7F26888-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $116.94 0.0293556 Eth | $30,486.00 253.550 0XC00E94CB662C3520282E6F5717214004A7F26888 | 0.0145% |
86 | PancakeSwap (v2) | 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8-0X2170ED0880AC9A755FD29B2688956BD959F933F8 | $117.35 0.0294543 Eth | $28,271.00 239.437 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8 | 0.0137% |
87 | HashKey Global | COMP-USDT | $116.45 0.0292302 Eth | $18,457.05 154.822 COMP | 0.0088% |
88 | ApeSwap | 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C | $116.97 0.0293660 Eth | $16,810.41 138.288 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8 | 0.0079% |
89 | Globe | COMP-USDT | $118.13 0.0296033 Eth | $13,920.13 116.377 COMP | 0.0067% |
90 | Uniswap V3 (Base) | 0X9E1028F5F1D5EDE59748FFCEE5532509976840E0-0X4200000000000000000000000000000000000006 | $115.12 0.0289059 Eth | $10,767.43 92.509 0X9E1028F5F1D5EDE59748FFCEE5532509976840E0 | 0.0053% |
91 | Uniswap V3 (Polygon) | 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619 | $116.62 0.0292775 Eth | $10,029.87 84.956 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C | 0.0049% |
92 | Uniswap V3 (Polygon) | 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270 | $116.84 0.0293317 Eth | $9,985.07 82.974 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C | 0.0047% |
93 | PancakeSwap V3 (BSC) | 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8-0X2170ED0880AC9A755FD29B2688956BD959F933F8 | $116.17 0.0291641 Eth | $7,873.08 67.575 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8 | 0.0039% |
94 | Mercado Bitcoin | COMP-BRL | $116.42 0.0292221 Eth | $3,245.90 27.881 COMP | 0.0016% |
95 | CEX.IO | COMP-USD | $116.61 0.0292720 Eth | $2,172.31 17.788 COMP | 0.0010% |
96 | Sushiswap (Polygon POS) | 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619 | $117.13 0.0293910 Eth | $339.40 2.861 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C | 0.0002% |
97 | CEX.IO | COMP-USDT | $116.43 0.0292299 Eth | $96.39 0.814 COMP | 0.0000% |
98 | CEX.IO | COMP-USDC | $116.95 0.0293571 Eth | $26.27 0.221 COMP | 0.0000% |
99 | CEX.IO | COMP-EUR | $116.90 0.0293445 Eth | $20.17 0.171 COMP | 0.0000% |
100 | Coinmetro | COMP-USDT | $116.65 0.0292828 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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