Feature Tip: Add private address tag to any address under My Name Tag !
Overview
Max Total Supply
10,000,000 COMP
Holders
219,489 ( -0.006%)
Market
Price
$116.68 @ 0.029946 ETH (+0.80%)
Onchain Market Cap
$1,166,800,000.00
Circulating Supply Market Cap
$1,033,361,230.00
Other Info
Token Contract (WITH 18 Decimals)
Balance
0.04737245158386741 COMPValue
$5.53 ( ~0.00141927381645718 Eth) [0.0000%]Loading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | Binance | COMP-USDT | $116.10 0.0298421 Eth | $55,203,218.00 476,649.114 COMP | 20.7750% |
2 | Websea | COMP-USDT | $116.51 0.0299554 Eth | $29,826,507.00 0.000 COMP | 0.0000% |
3 | P2B | COMP-USDT | $116.48 0.0299492 Eth | $20,252,683.00 173,877.783 COMP | 7.5786% |
4 | WhiteBIT | COMP-USDT | $116.10 0.0298378 Eth | $18,839,243.00 162,263.350 COMP | 7.0723% |
5 | Icrypex | COMP-USDT | $117.31 0.0301881 Eth | $15,573,584.00 132,751.680 COMP | 5.7861% |
6 | Ourbit | COMP-USDT | $116.24 0.0298781 Eth | $13,300,403.00 114,563.049 COMP | 4.9933% |
7 | Coinbase Exchange | COMP-USD | $116.01 0.0298197 Eth | $12,259,070.00 105,672.532 COMP | 4.6058% |
8 | Toobit | COMP-USDT | $116.88 0.0300923 Eth | $9,681,401.00 83,512.096 COMP | 3.6399% |
9 | OKX | COMP-USDT | $116.12 0.0298472 Eth | $9,025,851.00 77,581.989 COMP | 3.3815% |
10 | BYDFi | COMP-USDT | $116.33 0.0299112 Eth | $8,772,867.00 75,415.503 COMP | 3.2870% |
11 | Hotcoin | COMP-USDT | $116.52 0.0299580 Eth | $7,355,028.00 63,122.083 COMP | 2.7512% |
12 | Bitunix | COMP-USDT | $116.55 0.0299526 Eth | $6,513,565.00 55,879.084 COMP | 2.4355% |
13 | DigiFinex | COMP-USDT | $116.12 0.0298472 Eth | $5,122,131.00 44,111.221 COMP | 1.9226% |
14 | Biconomy.com | COMP-USDT | $116.09 0.0298387 Eth | $4,961,206.00 42,849.739 COMP | 1.8676% |
15 | Azbit | COMP-USDT | $116.01 0.0298181 Eth | $4,938,394.00 42,560.910 COMP | 1.8550% |
16 | Bitrue | COMP-USDT | $116.32 0.0299088 Eth | $4,722,187.00 40,596.460 COMP | 1.7694% |
17 | HTX | COMP-USDT | $115.98 0.0298070 Eth | $4,212,878.00 36,407.897 COMP | 1.5869% |
18 | Bybit | COMP-USDT | $116.25 0.0298806 Eth | $4,058,010.00 34,860.001 COMP | 1.5194% |
19 | Phemex | COMP-USDT | $116.24 0.0298890 Eth | $4,006,716.00 34,468.578 COMP | 1.5023% |
20 | Uniswap V3 (Ethereum) | 0XC00E94CB662C3520282E6F5717214004A7F26888-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $116.51 0.0299512 Eth | $3,937,840.00 33,660.776 0XC00E94CB662C3520282E6F5717214004A7F26888 | 1.4671% |
21 | Deepcoin | COMP-USDT | $116.60 0.0300576 Eth | $3,598,187.00 31,060.391 COMP | 1.3538% |
22 | BTSE | COMP-USDT | $116.20 0.0298790 Eth | $3,355,546.00 28,876.376 COMP | 1.2586% |
23 | Binance | COMP-TRY | $116.31 0.0298953 Eth | $2,699,657.00 23,409.725 COMP | 1.0203% |
24 | CoinW | COMP-USDT | $116.21 0.0298716 Eth | $2,556,044.00 21,994.623 COMP | 0.9586% |
25 | Koinpark | COMP-INR | $117.59 0.0302360 Eth | $2,402,315.00 20,429.672 COMP | 0.8904% |
26 | FameEX | COMP-USDT | $116.28 0.0298983 Eth | $2,156,222.00 18,618.666 COMP | 0.8115% |
27 | PointPay | COMP-USDT | $116.84 0.0301022 Eth | $2,148,901.00 18,563.061 COMP | 0.8091% |
28 | Gate.io | COMP-USDT | $116.28 0.0298896 Eth | $2,128,410.00 18,370.869 COMP | 0.8007% |
29 | Pionex | COMP-USDT | $116.47 0.0299249 Eth | $1,662,289.00 14,334.261 COMP | 0.6248% |
30 | BVOX | COMP-USDT | $116.44 0.0299284 Eth | $1,608,438.00 13,881.023 COMP | 0.6050% |
31 | Uniswap V3 (Ethereum) | 0XC00E94CB662C3520282E6F5717214004A7F26888-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $116.51 0.0299512 Eth | $1,534,412.00 13,057.893 0XC00E94CB662C3520282E6F5717214004A7F26888 | 0.5691% |
32 | WEEX | COMP-USDT | $116.01 0.0298189 Eth | $1,502,410.00 12,950.866 COMP | 0.5645% |
33 | Binance | COMP-BTC | $116.78 0.0300978 Eth | $1,466,305.00 13,023.373 COMP | 0.5676% |
34 | Bithumb | COMP-KRW | $115.53 0.0296966 Eth | $1,439,517.00 12,459.995 COMP | 0.5431% |
35 | Kraken | COMP-USD | $115.93 0.0297934 Eth | $1,341,116.00 11,568.328 COMP | 0.5042% |
36 | Dex-Trade | COMP-USDT | $116.49 0.0299467 Eth | $1,241,531.00 10,657.654 COMP | 0.4645% |
37 | KuCoin | COMP-USDT | $116.05 0.0298292 Eth | $1,203,553.00 10,371.123 COMP | 0.4520% |
38 | MEXC | COMP-USDT | $116.57 0.0300375 Eth | $1,159,772.00 9,949.244 COMP | 0.4336% |
39 | BitDelta | COMP-USDT | $116.52 0.0299506 Eth | $1,120,287.00 9,629.591 COMP | 0.4197% |
40 | LBank | COMP-USDT | $116.03 0.0298348 Eth | $1,018,699.00 8,779.659 COMP | 0.3827% |
41 | Hibt | COMP-USDT | $116.46 0.0299224 Eth | $903,194.00 7,763.994 COMP | 0.3384% |
42 | EarnBIT | COMP-USDT | $116.54 0.0299660 Eth | $887,330.00 7,615.271 COMP | 0.3319% |
43 | FMFW.io | COMP-USDT | $117.21 0.0301869 Eth | $878,504.00 7,494.936 COMP | 0.3267% |
44 | HitBTC | COMP-USDT | $116.45 0.0299400 Eth | $871,701.00 7,506.320 COMP | 0.3272% |
45 | Trubit | COMP-USDT | $116.30 0.0299035 Eth | $844,414.00 7,294.341 COMP | 0.3179% |
46 | Bitvavo | COMP-EUR | $116.59 0.0300573 Eth | $827,983.00 7,101.920 COMP | 0.3095% |
47 | Nonkyc.io | COMP-USDT | $116.59 0.0299959 Eth | $820,111.00 7,064.024 COMP | 0.3079% |
48 | LATOKEN | COMP-BTC | $116.54 0.0300500 Eth | $784,885.00 6,734.715 COMP | 0.2935% |
49 | Bitget | COMP-USDT | $116.09 0.0298395 Eth | $762,665.00 6,514.416 COMP | 0.2839% |
50 | BingX | COMP-USDT | $116.10 0.0298413 Eth | $668,722.00 5,767.106 COMP | 0.2514% |
51 | CoinEx | COMP-USDT | $116.15 0.0298650 Eth | $623,461.00 5,397.763 COMP | 0.2353% |
52 | Upbit | COMP-BTC | $116.16 0.0298572 Eth | $535,681.00 4,611.684 COMP | 0.2010% |
53 | LATOKEN | COMP-USDT | $116.33 0.0299071 Eth | $495,357.00 4,258.385 COMP | 0.1856% |
54 | BitMart | COMP-USDT | $116.30 0.0299054 Eth | $417,099.00 3,586.282 COMP | 0.1563% |
55 | KickEX | COMP-USDT | $116.33 0.0299071 Eth | $352,575.00 3,030.941 COMP | 0.1321% |
56 | bitcastle | COMP-USDT | $116.65 0.0300664 Eth | $346,575.00 2,965.339 COMP | 0.1292% |
57 | P2B | COMP-USD | $116.52 0.0299539 Eth | $335,570.00 2,879.937 COMP | 0.1255% |
58 | tanX | COMP-USDT | $116.64 0.0300523 Eth | $325,506.00 2,788.366 COMP | 0.1215% |
59 | Gemini | COMP-USD | $116.22 0.0298733 Eth | $302,660.00 2,604.198 COMP | 0.1135% |
60 | Bitazza | COMP-USDT | $116.02 0.0298314 Eth | $279,961.00 2,415.870 COMP | 0.1053% |
61 | Koinpark | COMP-USDT | $116.39 0.0299179 Eth | $274,791.00 2,360.899 COMP | 0.1029% |
62 | Coinbase Exchange | COMP-BTC | $116.15 0.0298554 Eth | $259,000.00 2,229.896 COMP | 0.0972% |
63 | QMall | COMP-USDT | $116.55 0.0299526 Eth | $254,758.00 2,196.386 COMP | 0.0957% |
64 | Kraken | COMP-EUR | $116.58 0.0299612 Eth | $238,738.00 2,047.796 COMP | 0.0893% |
65 | Bit2Me | COMP-EUR | $116.63 0.0299878 Eth | $236,041.00 2,032.218 COMP | 0.0886% |
66 | Bitso | COMP-USD | $116.29 0.0298968 Eth | $225,432.00 1,938.613 COMP | 0.0845% |
67 | Tokenize | COMP-SGD | $116.38 0.0300017 Eth | $223,107.00 1,917.017 COMP | 0.0836% |
68 | Tokenize | COMP-USD | $115.07 0.0295875 Eth | $221,126.00 1,921.662 COMP | 0.0838% |
69 | Bitfinex | COMP-USD | $116.83 0.0300301 Eth | $219,648.00 1,880.063 COMP | 0.0819% |
70 | Crypto.com Exchange | COMP-USD | $116.32 0.0298998 Eth | $205,177.00 1,763.860 COMP | 0.0769% |
71 | CoinCatch | COMP-USDT | $117.00 0.0301533 Eth | $186,867.00 1,612.993 COMP | 0.0703% |
72 | CoinTR | COMP-TRY | $116.62 0.0300081 Eth | $178,661.00 1,539.714 COMP | 0.0671% |
73 | BloFin | COMP-USDT | $116.37 0.0298992 Eth | $161,329.00 1,390.822 COMP | 0.0606% |
74 | Bitkub | COMP-THB | $115.94 0.0298123 Eth | $156,764.00 1,352.095 COMP | 0.0589% |
75 | AscendEX (BitMax) | COMP-USDT | $116.66 0.0299962 Eth | $151,198.00 1,296.089 COMP | 0.0565% |
76 | Kraken | COMP-XBT | $116.44 0.0299236 Eth | $118,465.00 1,017.417 COMP | 0.0443% |
77 | Crypto.com Exchange | COMP-USDT | $117.19 0.0301226 Eth | $111,868.00 954.590 COMP | 0.0416% |
78 | Azbit | COMP-BTC | $116.64 0.0299813 Eth | $100,603.00 886.120 COMP | 0.0386% |
79 | WOO X | COMP-USDT | $115.99 0.0298238 Eth | $97,175.00 837.810 COMP | 0.0365% |
80 | OKX | COMP-USDC | $116.48 0.0299390 Eth | $55,055.00 475.259 COMP | 0.0207% |
81 | Bit2Me | COMP-USDC | $118.47 0.0304996 Eth | $54,731.00 472.664 COMP | 0.0206% |
82 | TokoCrypto | COMP-USDT | $116.36 0.0299328 Eth | $54,478.00 468.200 COMP | 0.0204% |
83 | CoinTR | COMP-USDT | $116.24 0.0298882 Eth | $52,599.00 453.700 COMP | 0.0198% |
84 | PancakeSwap V1 (BSC) | 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8-0X2170ED0880AC9A755FD29B2688956BD959F933F8 | $116.65 0.0299956 Eth | $51,862.00 448.407 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8 | 0.0195% |
85 | Globe | COMP-USDT | $117.43 0.0302330 Eth | $39,243.00 336.256 COMP | 0.0147% |
86 | DeGate | 0XC00E94CB662C3520282E6F5717214004A7F26888-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48 | $116.76 0.0300116 Eth | $38,602.00 331.775 0XC00E94CB662C3520282E6F5717214004A7F26888 | 0.0145% |
87 | Uniswap V2 (Ethereum) | 0XC00E94CB662C3520282E6F5717214004A7F26888-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $118.19 0.0303676 Eth | $27,331.00 232.829 0XC00E94CB662C3520282E6F5717214004A7F26888 | 0.0101% |
88 | PancakeSwap (v2) | 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8-0X2170ED0880AC9A755FD29B2688956BD959F933F8 | $117.04 0.0300955 Eth | $24,663.00 213.868 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8 | 0.0093% |
89 | ApeSwap | 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C | $117.01 0.0300844 Eth | $20,697.00 178.472 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8 | 0.0078% |
90 | Uniswap V3 (Polygon) | 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619 | $115.73 0.0297504 Eth | $9,011.17 78.194 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C | 0.0034% |
91 | HashKey Global | COMP-USDT | $116.23 0.0298858 Eth | $8,801.98 75.175 COMP | 0.0033% |
92 | Uniswap V3 (Polygon) | 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270 | $116.35 0.0299091 Eth | $8,305.67 72.107 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C | 0.0031% |
93 | Mercado Bitcoin | COMP-BRL | $118.12 0.0303684 Eth | $6,645.61 56.262 COMP | 0.0025% |
94 | PancakeSwap V3 (BSC) | 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8-0X2170ED0880AC9A755FD29B2688956BD959F933F8 | $116.82 0.0300223 Eth | $6,352.27 55.375 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8 | 0.0024% |
95 | CEX.IO | COMP-USD | $116.50 0.0299487 Eth | $1,717.13 14.504 COMP | 0.0006% |
96 | Aerodrome (Base) | 0X4621B7A9C75199271F773EBD9A499DBD165C3191-0X9E1028F5F1D5EDE59748FFCEE5532509976840E0 | $109.06 0.0281088 Eth | $955.65 1,003.916 0X4621B7A9C75199271F773EBD9A499DBD165C3191 | 0.0438% |
97 | CEX.IO | COMP-USDT | $116.36 0.0299133 Eth | $746.06 6.107 COMP | 0.0003% |
98 | TokoCrypto | COMP-BTC | $116.78 0.0300985 Eth | $306.02 2.621 COMP | 0.0001% |
99 | Sushiswap (Polygon POS) | 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619 | $115.76 0.0298239 Eth | $237.61 2.076 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C | 0.0001% |
100 | Coinmetro | COMP-USDT | $116.72 0.0300895 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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