Feature Tip: Add private address tag to any address under My Name Tag !
Overview
Max Total Supply
10,000,000 COMP
Holders
219,330 ( -0.002%)
Market
Price
$117.26 @ 0.029315 ETH (-0.07%)
Onchain Market Cap
$1,172,600,000.00
Circulating Supply Market Cap
$1,037,611,921.00
Other Info
Token Contract (WITH 18 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | BTCC | COMP-USDT | $117.08 0.0292449 Eth | $29,536,844.00 247,960.089 COMP | 15.7390% |
2 | Binance | COMP-USDT | $117.54 0.0293278 Eth | $27,718,621.00 232,465.327 COMP | 14.7555% |
3 | WhiteBIT | COMP-USDT | $117.53 0.0293646 Eth | $14,925,356.00 126,989.192 COMP | 8.0605% |
4 | Websea | COMP-USDT | $117.32 0.0293053 Eth | $14,547,459.00 0.000 COMP | 0.0000% |
5 | P2B | COMP-USDT | $117.12 0.0292549 Eth | $11,463,660.00 97,878.265 COMP | 6.2127% |
6 | Icrypex | COMP-USDT | $117.19 0.0292269 Eth | $10,481,311.00 89,437.129 COMP | 5.6769% |
7 | Coinbase Exchange | COMP-USD | $117.36 0.0293149 Eth | $9,629,878.00 82,054.173 COMP | 5.2083% |
8 | Ourbit | COMP-USDT | $117.27 0.0292938 Eth | $7,113,400.00 59,658.432 COMP | 3.7868% |
9 | OKX | COMP-USDT | $116.93 0.0292215 Eth | $5,648,672.00 47,221.755 COMP | 2.9974% |
10 | Azbit | COMP-USDT | $117.76 0.0293800 Eth | $5,305,687.00 44,726.590 COMP | 2.8390% |
11 | Toobit | COMP-USDT | $117.16 0.0292653 Eth | $4,993,431.00 41,881.446 COMP | 2.6584% |
12 | BYDFi | COMP-USDT | $117.24 0.0292877 Eth | $4,465,153.00 38,085.818 COMP | 2.4175% |
13 | Bitunix | COMP-USDT | $117.06 0.0292372 Eth | $3,277,330.00 27,998.976 COMP | 1.7772% |
14 | HTX | COMP-USDT | $116.87 0.0292065 Eth | $3,240,176.00 27,289.174 COMP | 1.7322% |
15 | Uniswap V3 (Ethereum) | 0XC00E94CB662C3520282E6F5717214004A7F26888-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $116.11 0.0290099 Eth | $3,130,533.00 26,339.363 0XC00E94CB662C3520282E6F5717214004A7F26888 | 1.6719% |
16 | Biconomy.com | COMP-USDT | $117.53 0.0293646 Eth | $3,103,892.00 26,063.110 COMP | 1.6543% |
17 | Deepcoin | COMP-USDT | $117.47 0.0293047 Eth | $2,747,466.00 29,062.973 COMP | 1.8447% |
18 | DigiFinex | COMP-USDT | $117.03 0.0292411 Eth | $2,573,662.00 21,990.998 COMP | 1.3959% |
19 | Phemex | COMP-USDT | $117.07 0.0292397 Eth | $2,308,093.00 19,715.190 COMP | 1.2514% |
20 | Bitrue | COMP-USDT | $117.30 0.0293051 Eth | $2,294,593.00 19,561.250 COMP | 1.2416% |
21 | Bybit | COMP-USDT | $117.12 0.0292641 Eth | $1,983,926.00 16,593.030 COMP | 1.0532% |
22 | Gate.io | COMP-USDT | $117.17 0.0292726 Eth | $1,706,651.00 14,417.017 COMP | 0.9151% |
23 | Uniswap V3 (Ethereum) | 0XC00E94CB662C3520282E6F5717214004A7F26888-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $116.11 0.0290099 Eth | $1,677,614.00 13,904.655 0XC00E94CB662C3520282E6F5717214004A7F26888 | 0.8826% |
24 | WEEX | COMP-USDT | $117.01 0.0292006 Eth | $1,502,590.00 12,841.143 COMP | 0.8151% |
25 | BVOX | COMP-USDT | $117.24 0.0292458 Eth | $1,502,273.00 12,656.169 COMP | 0.8033% |
26 | CoinW | COMP-USDT | $117.01 0.0292280 Eth | $1,454,678.00 12,431.695 COMP | 0.7891% |
27 | Hotcoin | COMP-USDT | $117.42 0.0293000 Eth | $1,424,722.00 12,133.841 COMP | 0.7702% |
28 | BTSE | COMP-USDT | $117.48 0.0292968 Eth | $1,208,327.00 10,285.336 COMP | 0.6529% |
29 | Koinpark | COMP-INR | $118.32 0.0295555 Eth | $1,167,815.00 9,869.561 COMP | 0.6265% |
30 | LBank | COMP-USDT | $116.94 0.0292191 Eth | $1,091,766.00 9,335.757 COMP | 0.5926% |
31 | FameEX | COMP-USDT | $117.32 0.0293012 Eth | $1,070,201.00 8,975.623 COMP | 0.5697% |
32 | PointPay | COMP-USDT | $116.95 0.0291740 Eth | $1,049,180.00 8,802.388 COMP | 0.5587% |
33 | Binance | COMP-TRY | $117.70 0.0293973 Eth | $941,223.00 7,819.676 COMP | 0.4963% |
34 | Dex-Trade | COMP-USDT | $117.38 0.0293405 Eth | $932,925.00 7,948.021 COMP | 0.5045% |
35 | BitDelta | COMP-USDT | $117.23 0.0292829 Eth | $814,424.00 6,859.044 COMP | 0.4354% |
36 | Pionex | COMP-USDT | $117.14 0.0292656 Eth | $791,867.00 6,640.570 COMP | 0.4215% |
37 | MEXC | COMP-USDT | $117.17 0.0292680 Eth | $691,101.00 5,898.272 COMP | 0.3744% |
38 | Kraken | COMP-USD | $117.59 0.0293871 Eth | $608,770.00 5,177.057 COMP | 0.3286% |
39 | KuCoin | COMP-USDT | $117.32 0.0293136 Eth | $569,477.00 4,853.934 COMP | 0.3081% |
40 | Hibt | COMP-USDT | $117.24 0.0292940 Eth | $564,783.00 4,721.949 COMP | 0.2997% |
41 | Bitget | COMP-USDT | $117.06 0.0292491 Eth | $562,008.00 4,712.124 COMP | 0.2991% |
42 | Trubit | COMP-USDT | $117.30 0.0293090 Eth | $554,151.00 4,659.761 COMP | 0.2958% |
43 | Nonkyc.io | COMP-USDT | $116.85 0.0291599 Eth | $538,412.00 4,524.607 COMP | 0.2872% |
44 | EarnBIT | COMP-USDT | $117.51 0.0293179 Eth | $520,977.00 4,351.961 COMP | 0.2762% |
45 | Binance | COMP-BTC | $117.55 0.0293304 Eth | $448,286.00 3,791.964 COMP | 0.2407% |
46 | HitBTC | COMP-USDT | $117.01 0.0292361 Eth | $442,315.00 3,720.963 COMP | 0.2362% |
47 | FMFW.io | COMP-USDT | $117.18 0.0292795 Eth | $435,769.00 3,718.643 COMP | 0.2360% |
48 | KickEX | COMP-USDT | $117.40 0.0293263 Eth | $367,407.00 3,129.535 COMP | 0.1986% |
49 | CoinEx | COMP-USDT | $117.42 0.0293441 Eth | $365,159.00 3,069.803 COMP | 0.1949% |
50 | BingX | COMP-USDT | $117.05 0.0292466 Eth | $330,815.00 2,775.489 COMP | 0.1762% |
51 | tanX | COMP-USDT | $117.31 0.0292535 Eth | $309,845.00 2,613.928 COMP | 0.1659% |
52 | Bitazza | COMP-USDT | $116.70 0.0291526 Eth | $288,111.00 2,425.755 COMP | 0.1540% |
53 | BitMart | COMP-USDT | $117.20 0.0292896 Eth | $279,601.00 2,385.680 COMP | 0.1514% |
54 | Bitvavo | COMP-EUR | $117.61 0.0293833 Eth | $269,660.00 2,292.880 COMP | 0.1455% |
55 | LATOKEN | COMP-BTC | $116.84 0.0291940 Eth | $252,258.00 2,158.929 COMP | 0.1370% |
56 | LATOKEN | COMP-USDT | $117.03 0.0292416 Eth | $241,981.00 2,067.601 COMP | 0.1312% |
57 | WOO X | COMP-USDT | $117.24 0.0292877 Eth | $238,080.00 2,030.723 COMP | 0.1289% |
58 | CoinTR | COMP-TRY | $118.13 0.0295129 Eth | $196,950.00 1,651.443 COMP | 0.1048% |
59 | P2B | COMP-USD | $117.12 0.0292519 Eth | $186,737.00 1,594.409 COMP | 0.1012% |
60 | Tokenize | COMP-SGD | $116.83 0.0291822 Eth | $164,111.00 1,404.733 COMP | 0.0892% |
61 | Tokenize | COMP-USD | $116.23 0.0290013 Eth | $162,937.00 1,401.853 COMP | 0.0890% |
62 | Kraken | COMP-EUR | $117.15 0.0292715 Eth | $138,297.00 1,180.483 COMP | 0.0749% |
63 | Bit2Me | COMP-EUR | $117.15 0.0292697 Eth | $136,693.00 1,156.873 COMP | 0.0734% |
64 | AscendEX (BitMax) | COMP-USDT | $117.70 0.0294091 Eth | $136,324.00 1,158.204 COMP | 0.0735% |
65 | Koinpark | COMP-USDT | $117.24 0.0292855 Eth | $133,938.00 1,142.390 COMP | 0.0725% |
66 | Coinbase Exchange | COMP-BTC | $117.06 0.0292402 Eth | $131,026.00 1,119.295 COMP | 0.0710% |
67 | QMall | COMP-USDT | $117.02 0.0292303 Eth | $129,738.00 1,087.854 COMP | 0.0691% |
68 | Azbit | COMP-BTC | $117.64 0.0293928 Eth | $111,778.00 946.017 COMP | 0.0600% |
69 | BloFin | COMP-USDT | $117.57 0.0293203 Eth | $110,979.00 934.328 COMP | 0.0593% |
70 | Bitkub | COMP-THB | $117.12 0.0292281 Eth | $101,767.00 868.886 COMP | 0.0552% |
71 | Sushiswap | 0XC00E94CB662C3520282E6F5717214004A7F26888-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $117.01 0.0292264 Eth | $98,418.00 818.341 0XC00E94CB662C3520282E6F5717214004A7F26888 | 0.0519% |
72 | bitcastle | COMP-USDT | $117.00 0.0291865 Eth | $81,247.00 681.657 COMP | 0.0433% |
73 | Crypto.com Exchange | COMP-USD | $117.38 0.0293266 Eth | $63,486.00 540.880 COMP | 0.0343% |
74 | Kraken | COMP-XBT | $117.14 0.0292690 Eth | $50,605.00 431.995 COMP | 0.0274% |
75 | Bitfinex | COMP-USD | $116.39 0.0290805 Eth | $49,542.00 425.653 COMP | 0.0270% |
76 | CoinTR | COMP-USDT | $117.53 0.0293626 Eth | $49,432.00 416.484 COMP | 0.0264% |
77 | TokoCrypto | COMP-USDT | $117.24 0.0292940 Eth | $49,339.00 420.828 COMP | 0.0267% |
78 | OKX | COMP-USDC | $116.77 0.0291832 Eth | $44,761.00 374.523 COMP | 0.0238% |
79 | Bit2Me | COMP-USDC | $116.76 0.0291662 Eth | $43,862.00 367.033 COMP | 0.0233% |
80 | Crypto.com Exchange | COMP-USDT | $116.90 0.0292071 Eth | $40,370.00 345.350 COMP | 0.0219% |
81 | PancakeSwap V1 (BSC) | 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8-0X2170ED0880AC9A755FD29B2688956BD959F933F8 | $116.83 0.0291840 Eth | $34,150.00 287.392 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8 | 0.0182% |
82 | Uniswap V2 (Ethereum) | 0XC00E94CB662C3520282E6F5717214004A7F26888-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $116.61 0.0291365 Eth | $27,365.00 228.205 0XC00E94CB662C3520282E6F5717214004A7F26888 | 0.0145% |
83 | DeGate | 0XC00E94CB662C3520282E6F5717214004A7F26888-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48 | $117.13 0.0292604 Eth | $27,342.00 229.706 0XC00E94CB662C3520282E6F5717214004A7F26888 | 0.0146% |
84 | PancakeSwap (v2) | 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8-0X2170ED0880AC9A755FD29B2688956BD959F933F8 | $116.58 0.0291159 Eth | $25,562.00 218.407 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8 | 0.0139% |
85 | Nonkyc.io | COMP-BTC | $117.81 0.0294276 Eth | $23,266.00 196.679 COMP | 0.0125% |
86 | Bitfinex | COMP-USDT | $117.23 0.0292911 Eth | $20,671.00 176.329 COMP | 0.0112% |
87 | HashKey Global | COMP-USDT | $117.38 0.0292714 Eth | $17,448.28 146.690 COMP | 0.0093% |
88 | ApeSwap | 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C | $117.27 0.0292914 Eth | $14,678.96 121.541 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8 | 0.0077% |
89 | Globe | COMP-USDT | $117.63 0.0293441 Eth | $11,853.97 99.233 COMP | 0.0063% |
90 | Uniswap V3 (Base) | 0X9E1028F5F1D5EDE59748FFCEE5532509976840E0-0X4200000000000000000000000000000000000006 | $111.89 0.0279522 Eth | $9,426.95 82.226 0X9E1028F5F1D5EDE59748FFCEE5532509976840E0 | 0.0052% |
91 | Uniswap V3 (Polygon) | 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619 | $116.98 0.0292230 Eth | $8,693.03 73.398 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C | 0.0047% |
92 | Uniswap V3 (Polygon) | 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270 | $116.37 0.0290696 Eth | $7,285.13 60.876 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C | 0.0039% |
93 | PancakeSwap V3 (BSC) | 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8-0X2170ED0880AC9A755FD29B2688956BD959F933F8 | $116.69 0.0291510 Eth | $7,083.73 61.007 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8 | 0.0039% |
94 | CEX.IO | COMP-USD | $117.04 0.0291852 Eth | $2,172.31 17.788 COMP | 0.0011% |
95 | Sushiswap (Polygon POS) | 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619 | $116.11 0.0289689 Eth | $280.62 2.364 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C | 0.0002% |
96 | CEX.IO | COMP-USDT | $117.28 0.0293040 Eth | $96.40 0.814 COMP | 0.0001% |
97 | CEX.IO | COMP-USDC | $117.65 0.0293764 Eth | $26.26 0.221 COMP | 0.0000% |
98 | CEX.IO | COMP-EUR | $117.59 0.0293710 Eth | $20.17 0.171 COMP | 0.0000% |
99 | TokoCrypto | COMP-BTC | $116.97 0.0292216 Eth | $13.30 0.114 COMP | 0.0000% |
100 | Coinmetro | COMP-USDT | $117.18 0.0292699 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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