- $60,000 USDC main award pot
- Join C4 Discord to register
- Submit findings using the C4 form
- Read our guidelines for more details
- Starts 2021-05-13 00:00 UTC
- Ends 2021-05-18 23:59 UTC
Visor.sol is fork of Alchemist.wtc project's contracts/crucible/Crucible.sol which has been extended significantly. Of interest is the portion that has been added or altered.
Altered:
- transferERC20- Transfer ERC20 tokens out of vault by owner
- changed
- IERC20(token).balanceOf(address(this)) >= getBalanceLocked(token).add(amount)
- to
- IERC20(token).balanceOf(address(this)) >= (getBalanceLocked(token).add(amount)).add(timelockERC20Balances[token]),
- changed
Added:
- approveTransferERC20
- Approve delegate account to transfer ERC721 tokens out of vault
- approveTransferERC721
- Approve delegate account to transfer ERC20 tokens out of vault
- delegatedTransferERC20
- Transfer ERC20 tokens out of vault with an approved account
- transferERC721
- Transfer ERC721 out of vault
- onERC721Received
- ERC721Reciever interface hook- add to nfts[]
- timeLockERC721
- Lock ERC721 in vault until expires, redeemable by recipient
- timeUnlockERC721
- Withdraw ERC721 in vault post expires by recipient
- timeLockERC20
- Lock ERC20 tokens for recipient in the vault for provided expiry timestamp
- timeUnlockERC20
- Withdraw ERC20 from vault post expires by recipient
- getNftById
- Get ERC721 contract address, tokenId from nfts[] by index
- getNftIdByTokenIdAndAddr
- Get index of ERC721 in nfts[] given ERC721 minter and tokenId
- getTimeLockCount
- Get number of ERC20 timelocks for given token address
- getTimeLockERC721Count
- Get number of timelocks for NFTs of a given ERC721 contract
Name: Visor.sol (639 lines)
Libraries, interfaces relevant to scope:
- @openzeppelin/contracts/math/SafeMath.sol;
- @openzeppelin/contracts/token/ERC20/IERC20.sol;
- @openzeppelin/contracts/token/ERC721/IERC721.sol;
- @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol;
- @uniswap/lib/contracts/libraries/TransferHelper.sol;
- @openzeppelin/contracts/utils/Address.sol;
- /contracts/contracts/visor/OwnableERC721.sol
- /contracts/contracts/interfaces/IUniversalVault.sol
Libraries, interfaces not used in scope:
- @openzeppelin/contracts/proxy/Initializable.sol;
- @openzeppelin/contracts/utils/EnumerableSet.sol;
- /contracts/contracts/visor/ERC1271.sol
- /contracts/contracts/visor/EIP712.sol
- /contracts/contracts/interfaces/IVisorService.sol;