import { useEffect, useState } from 'react' /** * Evaluates whether the transaction is eligible to be sped up, and registers * an effect to check the logic again after the transaction has surpassed 5 seconds * of queue time. * @param {Object} transactionGroup - the transaction group to check against * @param {boolean} isEarliestNonce - Whether this group is currently the earliest nonce */ export function useShouldShowSpeedUp (transactionGroup, isEarliestNonce) { const { transactions, hasRetried } = transactionGroup const [earliestTransaction = {}] = transactions const { submittedTime } = earliestTransaction const [speedUpEnabled, setSpeedUpEnabled] = useState(() => { return Date.now() - submittedTime > 5000 && isEarliestNonce && !hasRetried }) useEffect(() => { // because this hook is optimized to only run on changes we have to // key into the changing time delta between submittedTime and now() // and if the status of the transaction changes based on that difference // trigger a setState call to tell react to re-render. This effect will // also immediately set retryEnabled and not create a timeout if the // condition is already met. This effect will run anytime the variables // for determining enabled status change let timeoutId if (!hasRetried && isEarliestNonce && !speedUpEnabled) { if (Date.now() - submittedTime > 5000) { setSpeedUpEnabled(true) } else { timeoutId = setTimeout(() => { setSpeedUpEnabled(true) clearTimeout(timeoutId) }, 5001 - (Date.now() - submittedTime)) } } // Anytime the effect is re-ran, make sure to remove a previously set timeout // so as to avoid multiple timers potentially overlapping return () => { if (timeoutId) { clearTimeout(timeoutId) } } }, [submittedTime, speedUpEnabled, hasRetried, isEarliestNonce]) return speedUpEnabled }