5967cf5d9d
* fix: can burn position even if fetching fees fails. * Revert "fix: can burn position even if fetching fees fails." This reverts commit a96f7178e55a264c32a3cf8c1b6562785cbd50d4. * recover more gracefully from failed fee fetch Co-authored-by: Noah Zinsmeister <noahwz@gmail.com>
56 lines
2.1 KiB
TypeScript
56 lines
2.1 KiB
TypeScript
import { BigNumber } from '@ethersproject/bignumber'
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import { Currency, CurrencyAmount } from '@uniswap/sdk-core'
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import { Pool } from '@uniswap/v3-sdk'
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import { useSingleCallResult } from 'lib/hooks/multicall'
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import useBlockNumber from 'lib/hooks/useBlockNumber'
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import { useEffect, useState } from 'react'
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import { unwrappedToken } from 'utils/unwrappedToken'
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import { useV3NFTPositionManagerContract } from './useContract'
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const MAX_UINT128 = BigNumber.from(2).pow(128).sub(1)
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// compute current + counterfactual fees for a v3 position
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export function useV3PositionFees(
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pool?: Pool,
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tokenId?: BigNumber,
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asWETH = false
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): [CurrencyAmount<Currency>, CurrencyAmount<Currency>] | [undefined, undefined] {
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const positionManager = useV3NFTPositionManagerContract(false)
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const owner: string | undefined = useSingleCallResult(tokenId ? positionManager : null, 'ownerOf', [tokenId])
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.result?.[0]
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const tokenIdHexString = tokenId?.toHexString()
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const latestBlockNumber = useBlockNumber()
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// we can't use multicall for this because we need to simulate the call from a specific address
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// latestBlockNumber is included to ensure data stays up-to-date every block
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const [amounts, setAmounts] = useState<[BigNumber, BigNumber] | undefined>()
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useEffect(() => {
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if (positionManager && tokenIdHexString && owner) {
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positionManager.callStatic
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.collect(
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{
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tokenId: tokenIdHexString,
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recipient: owner, // some tokens might fail if transferred to address(0)
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amount0Max: MAX_UINT128,
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amount1Max: MAX_UINT128,
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},
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{ from: owner } // need to simulate the call as the owner
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)
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.then((results) => {
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setAmounts([results.amount0, results.amount1])
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})
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}
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}, [positionManager, tokenIdHexString, owner, latestBlockNumber])
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if (pool && amounts) {
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return [
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CurrencyAmount.fromRawAmount(asWETH ? pool.token0 : unwrappedToken(pool.token0), amounts[0].toString()),
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CurrencyAmount.fromRawAmount(asWETH ? pool.token1 : unwrappedToken(pool.token1), amounts[1].toString()),
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]
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} else {
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return [undefined, undefined]
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}
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}
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