112 lines
3.1 KiB
TypeScript
112 lines
3.1 KiB
TypeScript
import { MangoAccount, PerpMarket } from '@blockworks-foundation/mango-v4'
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import LeverageSlider from '@components/shared/LeverageSlider'
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import mangoStore from '@store/mangoStore'
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import BN from 'bn.js'
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import useMangoAccount from 'hooks/useMangoAccount'
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import useSelectedMarket from 'hooks/useSelectedMarket'
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import { useCallback, useMemo } from 'react'
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import { GenericMarket } from 'types'
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import { floorToDecimal } from 'utils/numbers'
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export const usePerpMarketMax = (
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mangoAccount: MangoAccount | undefined,
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selectedMarket: GenericMarket | undefined,
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side: string,
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) => {
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const group = mangoStore.getState().group
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if (!mangoAccount || !group || !selectedMarket) return 0
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if (!(selectedMarket instanceof PerpMarket)) return 0
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try {
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if (side === 'buy') {
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return mangoAccount.getMaxQuoteForPerpBidUi(
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group,
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selectedMarket.perpMarketIndex,
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)
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} else {
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return mangoAccount.getMaxBaseForPerpAskUi(
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group,
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selectedMarket.perpMarketIndex,
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)
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}
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} catch (e) {
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console.error('Error calculating max leverage: ', e)
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return 0
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}
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}
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const PerpSlider = ({
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minOrderDecimals,
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tickDecimals,
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}: {
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minOrderDecimals: number
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tickDecimals: number
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}) => {
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const side = mangoStore((s) => s.tradeForm.side)
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const { selectedMarket, price: marketPrice } = useSelectedMarket()
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const { mangoAccount } = useMangoAccount()
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const tradeForm = mangoStore((s) => s.tradeForm)
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const perpMax = usePerpMarketMax(mangoAccount, selectedMarket, side)
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const step = useMemo(() => {
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if (selectedMarket instanceof PerpMarket) {
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return selectedMarket.baseLotsToUi(new BN(1))
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}
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return 0.01
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}, [selectedMarket])
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const handleSlide = useCallback(
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(val: string) => {
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const set = mangoStore.getState().set
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set((s) => {
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const price =
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s.tradeForm.tradeType === 'Market'
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? marketPrice
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: Number(s.tradeForm.price)
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if (s.tradeForm.side === 'buy') {
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if (Number(price)) {
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const baseSize = floorToDecimal(
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parseFloat(val) / price,
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minOrderDecimals,
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)
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const quoteSize = floorToDecimal(baseSize.mul(price), tickDecimals)
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s.tradeForm.baseSize = baseSize.toFixed()
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s.tradeForm.quoteSize = quoteSize.toFixed()
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} else {
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s.tradeForm.baseSize = ''
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s.tradeForm.quoteSize = val
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}
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} else if (s.tradeForm.side === 'sell') {
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s.tradeForm.baseSize = val
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if (Number(price)) {
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s.tradeForm.quoteSize = floorToDecimal(
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parseFloat(val) * price,
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tickDecimals,
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).toFixed()
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}
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}
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})
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},
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[marketPrice, minOrderDecimals, tickDecimals],
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)
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return (
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<div className="w-full px-3 md:px-4">
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<LeverageSlider
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amount={
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tradeForm.side === 'buy'
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? parseFloat(tradeForm.quoteSize)
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: parseFloat(tradeForm.baseSize)
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}
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leverageMax={perpMax}
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onChange={handleSlide}
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step={step}
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/>
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</div>
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)
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}
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export default PerpSlider
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