33 lines
1021 B
TypeScript
33 lines
1021 B
TypeScript
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import { useMemo } from 'react'
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import useMangoGroup from './useMangoGroup'
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export default function useLeverageMax(selectedToken: string) {
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const { group } = useMangoGroup()
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const stakeBank = useMemo(() => {
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return group?.banksMapByName.get(selectedToken)?.[0]
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}, [selectedToken, group])
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const borrowBank = useMemo(() => {
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return group?.banksMapByName.get('SOL')?.[0]
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}, [group])
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const leverageMax = useMemo(() => {
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if (!stakeBank || !borrowBank) return 1
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const borrowInitLiabWeight = borrowBank.scaledInitLiabWeight(
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borrowBank.price,
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)
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const stakeInitAssetWeight = stakeBank.scaledInitAssetWeight(
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stakeBank.price,
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)
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if (!borrowInitLiabWeight || !stakeInitAssetWeight) return 1
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const x = stakeInitAssetWeight.div(borrowInitLiabWeight).toNumber()
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const conversionRate = borrowBank.uiPrice / stakeBank.uiPrice
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const y = 1 - conversionRate * stakeInitAssetWeight.toNumber()
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return 1 + x / y
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}, [stakeBank, borrowBank])
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return leverageMax
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}
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