58 lines
2.0 KiB
TypeScript
58 lines
2.0 KiB
TypeScript
import { Currency, CurrencyAmount, TradeType } from '@uniswap/sdk-core'
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import { useMemo } from 'react'
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import { InterfaceTrade, TradeState } from 'state/routing/types'
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import { useRoutingAPITrade } from 'state/routing/useRoutingAPITrade'
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import useAutoRouterSupported from './useAutoRouterSupported'
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import { useClientSideV3Trade } from './useClientSideV3Trade'
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import useDebounce from './useDebounce'
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import useIsWindowVisible from './useIsWindowVisible'
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/**
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* Returns the best v2+v3 trade for a desired swap.
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* @param tradeType whether the swap is an exact in/out
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* @param amountSpecified the exact amount to swap in/out
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* @param otherCurrency the desired output/payment currency
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*/
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export function useBestTrade(
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tradeType: TradeType,
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amountSpecified?: CurrencyAmount<Currency>,
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otherCurrency?: Currency
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): {
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state: TradeState
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trade: InterfaceTrade<Currency, Currency, TradeType> | undefined
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} {
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const autoRouterSupported = useAutoRouterSupported()
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const isWindowVisible = useIsWindowVisible()
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const [debouncedAmount, debouncedOtherCurrency] = useDebounce(
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useMemo(() => [amountSpecified, otherCurrency], [amountSpecified, otherCurrency]),
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200
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)
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const routingAPITrade = useRoutingAPITrade(
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tradeType,
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autoRouterSupported && isWindowVisible ? debouncedAmount : undefined,
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debouncedOtherCurrency
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)
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const isLoading = routingAPITrade.state === TradeState.LOADING
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const useFallback = !autoRouterSupported || routingAPITrade.state === TradeState.NO_ROUTE_FOUND
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// only use client side router if routing api trade failed or is not supported
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const bestV3Trade = useClientSideV3Trade(
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tradeType,
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useFallback ? debouncedAmount : undefined,
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useFallback ? debouncedOtherCurrency : undefined
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)
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// only return gas estimate from api if routing api trade is used
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return useMemo(
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() => ({
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...(useFallback ? bestV3Trade : routingAPITrade),
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...(isLoading ? { state: TradeState.LOADING } : {}),
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}),
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[bestV3Trade, isLoading, routingAPITrade, useFallback]
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)
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}
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