Overview
Max Total Supply
10,000,000 COMP
Holders
219,335 ( 0.000%)
Market
Price
$118.86 @ 0.029718 ETH (-0.16%)
Onchain Market Cap
$1,188,600,000.00
Circulating Supply Market Cap
$1,054,218,471.00
Other Info
Token Contract (WITH 18 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | BTCC | COMP-USDT | $118.43 0.0296165 Eth | $25,869,114.00 218,297.086 COMP | 17.0117% |
2 | Binance | COMP-USDT | $118.31 0.0295865 Eth | $21,810,928.00 184,099.681 COMP | 14.3467% |
3 | WhiteBIT | COMP-USDT | $118.14 0.0295121 Eth | $12,758,872.00 107,995.709 COMP | 8.4160% |
4 | Websea | COMP-USDT | $118.87 0.0296964 Eth | $11,773,763.00 0.000 COMP | 0.0000% |
5 | P2B | COMP-USDT | $118.41 0.0296115 Eth | $10,362,957.00 87,517.945 COMP | 6.8202% |
6 | Coinbase Exchange | COMP-USD | $118.27 0.0295440 Eth | $7,207,346.00 60,939.767 COMP | 4.7490% |
7 | Icrypex | COMP-USDT | $118.31 0.0295352 Eth | $6,181,221.00 52,245.740 COMP | 4.0715% |
8 | Ourbit | COMP-USDT | $118.24 0.0295502 Eth | $5,655,174.00 47,734.611 COMP | 3.7199% |
9 | Azbit | COMP-USDT | $118.79 0.0296722 Eth | $5,294,070.00 44,752.440 COMP | 3.4875% |
10 | OKX | COMP-USDT | $118.50 0.0296353 Eth | $4,160,036.00 35,098.692 COMP | 2.7352% |
11 | Toobit | COMP-USDT | $119.45 0.0298190 Eth | $4,051,774.00 34,191.258 COMP | 2.6645% |
12 | BYDFi | COMP-USDT | $118.24 0.0295371 Eth | $3,620,117.00 30,616.047 COMP | 2.3859% |
13 | HTX | COMP-USDT | $118.26 0.0295688 Eth | $3,018,752.00 25,510.878 COMP | 1.9880% |
14 | Biconomy.com | COMP-USDT | $119.17 0.0297490 Eth | $2,654,269.00 22,417.940 COMP | 1.7470% |
15 | Bitunix | COMP-USDT | $118.44 0.0295681 Eth | $2,645,006.00 22,344.528 COMP | 1.7413% |
16 | Uniswap V3 (Ethereum) | 0XC00E94CB662C3520282E6F5717214004A7F26888-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $119.39 0.0298045 Eth | $2,115,501.00 17,659.102 0XC00E94CB662C3520282E6F5717214004A7F26888 | 1.3762% |
17 | DigiFinex | COMP-USDT | $118.59 0.0296566 Eth | $2,062,363.00 17,390.752 COMP | 1.3552% |
18 | Phemex | COMP-USDT | $119.22 0.0297396 Eth | $2,012,284.00 16,878.849 COMP | 1.3154% |
19 | Bitrue | COMP-USDT | $118.55 0.0295955 Eth | $1,915,909.00 16,160.660 COMP | 1.2594% |
20 | WEEX | COMP-USDT | $118.97 0.0297087 Eth | $1,504,693.00 12,647.729 COMP | 0.9856% |
21 | Deepcoin | COMP-USDT | $118.71 0.0296871 Eth | $1,496,779.00 17,246.515 COMP | 1.3440% |
22 | BVOX | COMP-USDT | $118.09 0.0294806 Eth | $1,485,286.00 12,551.407 COMP | 0.9781% |
23 | Bybit | COMP-USDT | $118.81 0.0297116 Eth | $1,445,930.00 12,173.768 COMP | 0.9487% |
24 | Gate.io | COMP-USDT | $117.95 0.0294964 Eth | $1,422,631.00 12,097.450 COMP | 0.9427% |
25 | CoinW | COMP-USDT | $118.32 0.0295410 Eth | $1,260,844.00 10,656.169 COMP | 0.8304% |
26 | Hotcoin | COMP-USDT | $118.32 0.0295838 Eth | $1,188,750.00 10,047.154 COMP | 0.7830% |
27 | LBank | COMP-USDT | $118.21 0.0295521 Eth | $1,062,297.00 8,986.594 COMP | 0.7003% |
28 | BTSE | COMP-USDT | $118.11 0.0294895 Eth | $951,196.00 8,053.163 COMP | 0.6276% |
29 | Koinpark | COMP-INR | $119.13 0.0297879 Eth | $944,470.00 7,927.864 COMP | 0.6178% |
30 | FameEX | COMP-USDT | $118.94 0.0297118 Eth | $862,429.00 7,279.371 COMP | 0.5673% |
31 | Uniswap V3 (Ethereum) | 0XC00E94CB662C3520282E6F5717214004A7F26888-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $119.17 0.0297498 Eth | $824,397.00 6,965.851 0XC00E94CB662C3520282E6F5717214004A7F26888 | 0.5428% |
32 | PointPay | COMP-USDT | $118.24 0.0295596 Eth | $803,564.00 6,785.570 COMP | 0.5288% |
33 | Dex-Trade | COMP-USDT | $118.77 0.0297016 Eth | $738,936.00 6,221.588 COMP | 0.4848% |
34 | BitDelta | COMP-USDT | $118.45 0.0296164 Eth | $710,226.00 5,989.557 COMP | 0.4668% |
35 | Pionex | COMP-USDT | $118.16 0.0294803 Eth | $633,420.00 5,344.705 COMP | 0.4165% |
36 | Binance | COMP-TRY | $118.62 0.0296652 Eth | $630,093.00 5,291.322 COMP | 0.4123% |
37 | MEXC | COMP-USDT | $118.26 0.0295421 Eth | $521,816.00 4,412.357 COMP | 0.3439% |
38 | Trubit | COMP-USDT | $118.23 0.0295586 Eth | $518,722.00 4,378.236 COMP | 0.3412% |
39 | Nonkyc.io | COMP-USDT | $117.67 0.0293743 Eth | $486,234.00 4,102.770 COMP | 0.3197% |
40 | FMFW.io | COMP-USDT | $118.26 0.0295659 Eth | $425,842.00 3,600.768 COMP | 0.2806% |
41 | HitBTC | COMP-USDT | $118.43 0.0296083 Eth | $425,322.00 3,593.431 COMP | 0.2800% |
42 | Hibt | COMP-USDT | $119.20 0.0297635 Eth | $423,663.00 3,574.560 COMP | 0.2786% |
43 | EarnBIT | COMP-USDT | $119.73 0.0298954 Eth | $404,808.00 3,411.050 COMP | 0.2658% |
44 | KuCoin | COMP-USDT | $118.18 0.0295540 Eth | $401,134.00 3,394.285 COMP | 0.2645% |
45 | Bitget | COMP-USDT | $118.64 0.0296691 Eth | $400,218.00 3,388.068 COMP | 0.2640% |
46 | Kraken | COMP-USD | $118.43 0.0296177 Eth | $384,696.00 3,248.297 COMP | 0.2531% |
47 | Binance | COMP-BTC | $119.25 0.0297336 Eth | $378,195.00 3,211.102 COMP | 0.2502% |
48 | KickEX | COMP-USDT | $118.57 0.0296005 Eth | $367,896.00 3,102.675 COMP | 0.2418% |
49 | CoinEx | COMP-USDT | $118.19 0.0295513 Eth | $320,094.00 2,709.291 COMP | 0.2111% |
50 | tanX | COMP-USDT | $118.55 0.0295739 Eth | $315,501.00 2,672.354 COMP | 0.2083% |
51 | Bitazza | COMP-USDT | $118.27 0.0295194 Eth | $285,132.00 2,408.672 COMP | 0.1877% |
52 | BingX | COMP-USDT | $118.75 0.0296971 Eth | $276,778.00 2,336.206 COMP | 0.1821% |
53 | LATOKEN | COMP-BTC | $119.00 0.0296846 Eth | $246,921.00 2,074.989 COMP | 0.1617% |
54 | WOO X | COMP-USDT | $118.42 0.0295569 Eth | $237,618.00 2,006.539 COMP | 0.1564% |
55 | BitMart | COMP-USDT | $118.37 0.0295981 Eth | $229,911.00 1,942.240 COMP | 0.1514% |
56 | Bitvavo | COMP-EUR | $119.00 0.0297270 Eth | $205,953.00 1,730.655 COMP | 0.1349% |
57 | LATOKEN | COMP-USDT | $118.41 0.0296046 Eth | $196,952.00 1,663.280 COMP | 0.1296% |
58 | CoinTR | COMP-TRY | $119.20 0.0297653 Eth | $193,452.00 1,625.521 COMP | 0.1267% |
59 | P2B | COMP-USD | $118.35 0.0295967 Eth | $162,924.00 1,376.627 COMP | 0.1073% |
60 | Tokenize | COMP-SGD | $118.39 0.0296071 Eth | $159,117.00 1,343.986 COMP | 0.1047% |
61 | Tokenize | COMP-USD | $117.39 0.0293566 Eth | $157,815.00 1,344.368 COMP | 0.1048% |
62 | AscendEX (BitMax) | COMP-USDT | $118.20 0.0295538 Eth | $135,615.00 1,147.366 COMP | 0.0894% |
63 | Bitso | COMP-USD | $118.30 0.0295544 Eth | $129,380.00 1,093.635 COMP | 0.0852% |
64 | Azbit | COMP-BTC | $119.62 0.0298341 Eth | $111,659.00 944.810 COMP | 0.0736% |
65 | Koinpark | COMP-USDT | $119.24 0.0297398 Eth | $109,556.00 918.774 COMP | 0.0716% |
66 | QMall | COMP-USDT | $118.55 0.0295877 Eth | $105,034.00 885.952 COMP | 0.0690% |
67 | BloFin | COMP-USDT | $118.29 0.0295335 Eth | $104,274.00 880.508 COMP | 0.0686% |
68 | Kraken | COMP-EUR | $117.71 0.0294384 Eth | $102,054.00 866.972 COMP | 0.0676% |
69 | Bit2Me | COMP-EUR | $118.98 0.0296572 Eth | $97,216.00 820.236 COMP | 0.0639% |
70 | Coinbase Exchange | COMP-BTC | $118.00 0.0294758 Eth | $91,600.00 776.293 COMP | 0.0605% |
71 | Bitkub | COMP-THB | $118.55 0.0295542 Eth | $85,646.00 722.457 COMP | 0.0563% |
72 | Sushiswap | 0XC00E94CB662C3520282E6F5717214004A7F26888-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $118.30 0.0295843 Eth | $61,691.00 520.701 0XC00E94CB662C3520282E6F5717214004A7F26888 | 0.0406% |
73 | bitcastle | COMP-USDT | $118.40 0.0296039 Eth | $61,566.00 519.803 COMP | 0.0405% |
74 | Crypto.com Exchange | COMP-USD | $118.71 0.0296808 Eth | $52,045.00 438.440 COMP | 0.0342% |
75 | CoinTR | COMP-USDT | $118.90 0.0296897 Eth | $48,524.00 409.814 COMP | 0.0319% |
76 | Gemini | COMP-USD | $119.81 0.0299628 Eth | $47,684.00 397.997 COMP | 0.0310% |
77 | Kraken | COMP-XBT | $119.01 0.0297619 Eth | $30,699.00 257.964 COMP | 0.0201% |
78 | TokoCrypto | COMP-USDT | $118.30 0.0295761 Eth | $26,279.00 222.143 COMP | 0.0173% |
79 | Bit2Me | COMP-USDC | $118.48 0.0295544 Eth | $25,751.00 217.773 COMP | 0.0170% |
80 | OKX | COMP-USDC | $118.44 0.0296197 Eth | $24,466.00 206.994 COMP | 0.0161% |
81 | DeGate | 0XC00E94CB662C3520282E6F5717214004A7F26888-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48 | $118.30 0.0295367 Eth | $23,067.00 194.472 0XC00E94CB662C3520282E6F5717214004A7F26888 | 0.0152% |
82 | PancakeSwap V1 (BSC) | 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8-0X2170ED0880AC9A755FD29B2688956BD959F933F8 | $118.48 0.0296096 Eth | $22,914.00 194.848 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8 | 0.0152% |
83 | PancakeSwap (v2) | 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8-0X2170ED0880AC9A755FD29B2688956BD959F933F8 | $118.60 0.0296067 Eth | $20,584.00 177.226 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8 | 0.0138% |
84 | HashKey Global | COMP-USDT | $118.37 0.0295698 Eth | $16,188.16 136.744 COMP | 0.0107% |
85 | Bitfinex | COMP-USDT | $118.94 0.0297448 Eth | $15,163.52 127.492 COMP | 0.0099% |
86 | HashKey Exchange | COMP-USD | $118.28 0.0295308 Eth | $14,636.75 123.253 COMP | 0.0096% |
87 | ApeSwap | 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C | $118.97 0.0297514 Eth | $10,523.72 86.964 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8 | 0.0068% |
88 | Globe | COMP-USDT | $119.59 0.0298604 Eth | $8,453.16 71.113 COMP | 0.0055% |
89 | Uniswap V3 (Polygon) | 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619 | $117.85 0.0294668 Eth | $7,772.75 65.799 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C | 0.0051% |
90 | Uniswap V3 (Polygon) | 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270 | $117.21 0.0293081 Eth | $6,611.89 55.943 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C | 0.0044% |
91 | PancakeSwap V3 (BSC) | 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8-0X2170ED0880AC9A755FD29B2688956BD959F933F8 | $118.60 0.0295881 Eth | $5,580.54 48.756 0X52CE071BD9B1C4B00A0B92D298C512478CAD67E8 | 0.0038% |
92 | Aerodrome (Base) | 0X4621B7A9C75199271F773EBD9A499DBD165C3191-0X9E1028F5F1D5EDE59748FFCEE5532509976840E0 | $113.61 0.0283419 Eth | $2,854.75 2,875.057 0X4621B7A9C75199271F773EBD9A499DBD165C3191 | 0.2241% |
93 | OKX | COMP-EUR | $116.79 0.0292084 Eth | $2,210.98 18.531 COMP | 0.0014% |
94 | Mercado Bitcoin | COMP-BRL | $117.74 0.0294436 Eth | $2,110.19 17.923 COMP | 0.0014% |
95 | Sushiswap (Polygon POS) | 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619 | $116.89 0.0291857 Eth | $246.36 2.096 0X8505B9D2254A7AE468C0E9DD10CCEA3A837AEF5C | 0.0002% |
96 | CEX.IO | COMP-USD | $118.31 0.0295867 Eth | $237.44 2.000 COMP | 0.0002% |
97 | CEX.IO | COMP-USDT | $118.23 0.0295477 Eth | $65.40 0.554 COMP | 0.0000% |
98 | CEX.IO | COMP-EUR | $119.18 0.0297582 Eth | $20.17 0.171 COMP | 0.0000% |
99 | TokoCrypto | COMP-BTC | $118.96 0.0297184 Eth | $13.33 0.112 COMP | 0.0000% |
100 | Coinmetro | COMP-USDT | $118.25 0.0295158 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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