77 lines
2.8 KiB
TypeScript
77 lines
2.8 KiB
TypeScript
import BigNumber from 'bignumber.js'
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import { useMemo } from 'react'
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import { DEFAULT_SETTINGS } from 'constants/defaultSettings'
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import { LocalStorageKeys } from 'constants/localStorageKeys'
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import { BN_ZERO } from 'constants/math'
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import useLocalStorage from 'hooks/useLocalStorage'
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import usePrices from 'hooks/usePrices'
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import useSwapValueLoss from 'hooks/useSwapValueLoss'
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import { BNCoin } from 'types/classes/BNCoin'
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import { Action } from 'types/generated/mars-credit-manager/MarsCreditManager.types'
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import { SWAP_FEE_BUFFER } from 'utils/constants'
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import { getCoinAmount, getCoinValue } from 'utils/formatters'
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interface Props {
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account: HLSAccountWithStrategy
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}
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export default function UseClosePositionActions(props: Props): Action[] {
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const [slippage] = useLocalStorage<number>(LocalStorageKeys.SLIPPAGE, DEFAULT_SETTINGS.slippage)
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const { data: prices } = usePrices()
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const collateralDenom = props.account.strategy.denoms.deposit
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const borrowDenom = props.account.strategy.denoms.borrow
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const { data: swapValueLoss } = useSwapValueLoss(collateralDenom, borrowDenom)
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const debtAmount: BigNumber = useMemo(
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() =>
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props.account.debts.find((debt) => debt.denom === props.account.strategy.denoms.borrow)
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?.amount || BN_ZERO,
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[props.account.debts, props.account.strategy.denoms.borrow],
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)
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const collateralAmount: BigNumber = useMemo(
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() =>
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props.account.deposits.find(
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(deposit) => deposit.denom === props.account.strategy.denoms.deposit,
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)?.amount || BN_ZERO,
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[props.account.deposits, props.account.strategy.denoms.deposit],
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)
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const swapInAmount = useMemo(() => {
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const targetValue = getCoinValue(BNCoin.fromDenomAndBigNumber(borrowDenom, debtAmount), prices)
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return BigNumber.max(
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getCoinAmount(collateralDenom, targetValue, prices)
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.times(1 + slippage + SWAP_FEE_BUFFER + swapValueLoss)
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.integerValue(),
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collateralAmount,
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)
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}, [borrowDenom, debtAmount, prices, slippage, swapValueLoss, collateralDenom, collateralAmount])
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return useMemo<Action[]>(
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() => [
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...(debtAmount.isZero()
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? []
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: [
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{
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swap_exact_in: {
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coin_in: BNCoin.fromDenomAndBigNumber(collateralDenom, swapInAmount).toActionCoin(),
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denom_out: borrowDenom,
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slippage: slippage.toString(),
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},
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},
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{
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repay: {
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coin: BNCoin.fromDenomAndBigNumber(
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borrowDenom,
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debtAmount.times(1.0001).integerValue(), // Over pay to by-pass increase in debt
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).toActionCoin(),
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},
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},
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]),
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{ refund_all_coin_balances: {} },
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],
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[borrowDenom, collateralDenom, debtAmount, slippage, swapInAmount],
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)
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}
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