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23 changes: 23 additions & 0 deletions
23
src/custom/pages/error/AnySwapAffectedUsers/RedirectAnySwapAffectedUsers.tsx
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,23 @@ | ||
| import { useEffect } from 'react' | ||
| import { useHistory, useLocation } from 'react-router-dom' | ||
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| import useIsAnySwapAffectedUser from './useIsAnySwapAffectedUser' | ||
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| const WARNING_PAGE = '/anyswap-affected-users' | ||
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| export default function RedirectAnySwapAffectedUsers() { | ||
| const history = useHistory() | ||
| const { pathname } = useLocation() | ||
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| // Detect if the user is affected by the hack | ||
| const isAnySwapAffectedUser = useIsAnySwapAffectedUser() | ||
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| useEffect(() => { | ||
| if (isAnySwapAffectedUser && location.pathname !== WARNING_PAGE) { | ||
| // Redirect to warning page | ||
| history.push(WARNING_PAGE) | ||
| } | ||
| }, [isAnySwapAffectedUser, history, pathname]) | ||
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| return null | ||
| } |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,96 @@ | ||
| import styled from 'styled-components/macro' | ||
| import Page, { Title, Content, GdocsListStyle } from 'components/Page' | ||
| import { ButtonPrimary } from 'custom/components/Button' | ||
| import cow404IMG from 'assets/cow-swap/cow-404.png' | ||
| import { ExternalLink as ExternalLinkTheme } from 'theme' | ||
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| const ExternalLink = styled(ExternalLinkTheme)`` | ||
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| const Wrapper = styled(Page)` | ||
| ${GdocsListStyle} | ||
| min-height: auto; | ||
| padding-bottom: 32px; | ||
| ${({ theme }) => theme.mediaWidth.upToSmall` | ||
| padding-bottom: 24px; | ||
| `} | ||
| ${Title} { | ||
| margin-bottom: 50px; | ||
| font-size: 26px; | ||
| ${({ theme }) => theme.mediaWidth.upToSmall` | ||
| font-size: 18px; | ||
| text-align: center; | ||
| `} | ||
| } | ||
| ${Content} { | ||
| margin-bottom: 0; | ||
| pre { | ||
| display: inline; | ||
| } | ||
| } | ||
| ${ExternalLink} { | ||
| text-decoration: underline; | ||
| font-weight: 800; | ||
| color: ${({ theme }) => theme.primary1}; | ||
| } | ||
| ` | ||
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| const Container = styled.div` | ||
| display: flex; | ||
| flex-direction: column; | ||
| align-items: center; | ||
| ${ButtonPrimary} { | ||
| width: 196px; | ||
| padding: 9px; | ||
| color: ${({ theme }) => theme.primaryText1}; | ||
| &:hover { | ||
| ${({ theme }) => theme.buttonPrimary.background} | ||
| } | ||
| } | ||
| h2 { | ||
| margin: 36px 0 32px; | ||
| } | ||
| img { | ||
| max-width: 506px; | ||
| } | ||
| p { | ||
| text-align: left; | ||
| } | ||
| ${({ theme }) => theme.mediaWidth.upToSmall` | ||
| img { | ||
| max-width: 287px; | ||
| } | ||
| h2 { | ||
| font-size: 16px; | ||
| text-align: center; | ||
| } | ||
| `} | ||
| ` | ||
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| export default function AnySwapAffectedUsers() { | ||
| return ( | ||
| <Wrapper> | ||
| <Title>Your account is affected by AnySwap Hack</Title> | ||
| <Content> | ||
| <Container> | ||
| <img src={cow404IMG} alt="CowSwap 404 not found" /> | ||
| <h2>Read how to prevent loosing funds</h2> | ||
| </Container> | ||
| <p> | ||
| Your user has given an allowance to <pre>AnyswapV4Router</pre> which is affected by a critical vulnerability. | ||
| </p> | ||
| <p>In order to protect your funds, you will need to remove the approval on this contract.</p> | ||
| <p> | ||
| Please read more in this{' '} | ||
| <ExternalLink href="https://cointelegraph.com/news/multichain-asks-users-to-revoke-approvals-amid-critical-vulnerability"> | ||
| link | ||
| </ExternalLink> | ||
| . | ||
| </p> | ||
| </Content> | ||
| </Wrapper> | ||
| ) | ||
| } |
53 changes: 53 additions & 0 deletions
53
src/custom/pages/error/AnySwapAffectedUsers/useIsAnySwapAffectedUser.ts
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| @@ -0,0 +1,53 @@ | ||
| import { useMultipleContractSingleData } from 'state/multicall/hooks' | ||
| import { WETH9_EXTENDED as WETH } from 'constants/tokens' | ||
| import { Interface } from '@ethersproject/abi' | ||
| import ERC20_ABI from 'abis/erc20.json' | ||
| import { Erc20Interface } from '@src/abis/types/Erc20' | ||
| import { ChainId } from '@uniswap/sdk' | ||
| import { useActiveWeb3React } from 'hooks/web3' | ||
| import { useMemo } from 'react' | ||
| import { ZERO_ADDRESS } from '@src/constants/misc' | ||
| import { BigNumber } from '@ethersproject/bignumber' | ||
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| const WETH_ADDRESS = WETH[ChainId.MAINNET].address | ||
| const PERI_ADDRESS = '0x5d30aD9C6374Bf925D0A75454fa327AACf778492' | ||
| const MATIC_ADDRESS = '0x7d1afa7b718fb893db30a3abc0cfc608aacfebb0' | ||
| const WBNB_ADDRESS = '0x418d75f65a02b3d53b2418fb8e1fe493759c7605' | ||
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| const AFFECTED_TOKENS = [WETH_ADDRESS, PERI_ADDRESS, MATIC_ADDRESS, WBNB_ADDRESS] // relevant tokens for the check | ||
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| const ERC20_INTERFACE = new Interface(ERC20_ABI) as Erc20Interface | ||
| const ANYSWAP_V4_CONTRACT = '0x6b7a87899490EcE95443e979cA9485CBE7E71522' | ||
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| // Uncomment to test logic: 0xC92...522 is mainnet VaultRelayer address. Use it with one account that has given some WETH allowance to it | ||
| // const ANYSWAP_V4_CONTRACT = '0xC92E8bdf79f0507f65a392b0ab4667716BFE0110' //'0x6b7a87899490EcE95443e979cA9485CBE7E71522' | ||
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| const BLOCKS_PER_FETCH = 120 // 30min. It would actually suffice to check once, but we check every 120 blocks | ||
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| export default function useIsAnySwapAffectedUser() { | ||
| const { chainId, account } = useActiveWeb3React() | ||
| const result = useMultipleContractSingleData( | ||
| AFFECTED_TOKENS, | ||
| ERC20_INTERFACE, | ||
| 'allowance', | ||
| [account || ZERO_ADDRESS, ANYSWAP_V4_CONTRACT], | ||
| { blocksPerFetch: BLOCKS_PER_FETCH } | ||
| ) | ||
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| const isAffected = useMemo(() => { | ||
| // The error affects Mainnet | ||
| if (chainId !== ChainId.MAINNET) { | ||
| return false | ||
| } | ||
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| // Check if any of the tokens has allowance in the router contract | ||
| const hasAllowance = result.some(({ result, loading, error, valid }) => { | ||
| const allowance = valid && !loading && !error && result ? (result[0] as BigNumber) : undefined | ||
| return allowance ? !allowance.isZero() : false | ||
| }) | ||
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| return hasAllowance | ||
| }, [chainId, result]) | ||
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| return isAffected | ||
| } |
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