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Change inputs for transferring debt from external loan (#1947)
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@onnovisser
onnovisser authored Feb 15, 2024
1 parent 82f51ec commit fcda765
Showing 1 changed file with 65 additions and 36 deletions.
101 changes: 65 additions & 36 deletions centrifuge-app/src/pages/Loan/TransferDebtForm.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -14,7 +14,7 @@ import { useMetadata } from '../../utils/useMetadata'
import { useCentNFT } from '../../utils/useNFTs'
import { useBorrower } from '../../utils/usePermissions'
import { usePool } from '../../utils/usePools'
import { combine, maxPriceVariance, settlementPrice } from '../../utils/validation'
import { combine, maxPriceVariance, positiveNumber, settlementPrice } from '../../utils/validation'
import { ExternalFinanceFields } from './ExternalFinanceForm'
import { isExternalLoan } from './utils'

Expand All @@ -23,6 +23,7 @@ type FormValues = {
amount: number | '' | Decimal
price: number | '' | Decimal
faceValue: number | ''
targetLoanFaceValue: number | '' | Decimal
targetLoanPrice: number | '' | Decimal
}

Expand Down Expand Up @@ -55,6 +56,7 @@ export function TransferDebtForm({ loan }: { loan: LoanType }) {
price: '',
faceValue: '',
targetLoanPrice: '',
targetLoanFaceValue: '',
},
onSubmit: (values, actions) => {
if (!selectedLoan) return
Expand All @@ -67,6 +69,9 @@ export function TransferDebtForm({ loan }: { loan: LoanType }) {
quantity: Price.fromFloat(Dec(values.faceValue).div(loan.pricing.notional.toDecimal())),
}
borrowAmount = borrow.quantity.mul(borrow.price).div(Price.fromFloat(1))
} else if (isExternalLoan(selectedLoan)) {
borrow = { amount: CurrencyBalance.fromFloat(financeAmount, pool.currency.decimals) }
borrowAmount = borrow.amount
} else {
borrow = { amount: CurrencyBalance.fromFloat(values.amount, pool.currency.decimals) }
borrowAmount = borrow.amount
Expand All @@ -82,7 +87,7 @@ export function TransferDebtForm({ loan }: { loan: LoanType }) {
let repay: any = { principal, interest }
if (isExternalLoan(selectedLoan)) {
const repayPriceBN = CurrencyBalance.fromFloat(form.values.targetLoanPrice || 1, pool.currency.decimals)
const repayQuantityBN = Price.fromFloat(financeAmount.div(repayPriceBN.toDecimal()))
const repayQuantityBN = Price.fromFloat(Dec(values.targetLoanFaceValue || 0).div(selectedLoan.pricing.notional.toDecimal()))
repay = { quantity: repayQuantityBN, price: repayPriceBN, interest }
}

Expand All @@ -92,25 +97,26 @@ export function TransferDebtForm({ loan }: { loan: LoanType }) {
})
actions.setSubmitting(false)
},
validate(values) {
validate(values) {
const financeAmount = isExternalLoan(loan)
? Dec(values.price || 0)
.mul(Dec(values.faceValue || 0))
.div(loan.pricing.notional.toDecimal())
: selectedLoan && isExternalLoan(selectedLoan) ? Dec(values.targetLoanPrice || 0)
.mul(Dec(values.targetLoanFaceValue || 0))
.div(selectedLoan.pricing.notional.toDecimal()): Dec(values.amount || 0)

let errors: any = {}
if (selectedLoan && isExternalLoan(selectedLoan)) {
const financeAmount = isExternalLoan(loan)
? Dec(form.values.price || 0)
.mul(Dec(form.values.faceValue || 0))
.div(loan.pricing.notional.toDecimal())
: Dec(form.values.amount || 0)
const financeAmountBN = CurrencyBalance.fromFloat(financeAmount, pool.currency.decimals)
const repayPrice = Dec(form.values.targetLoanPrice || 1)
const repayQuantity = financeAmount.div(repayPrice)
const repayAmountBN = CurrencyBalance.fromFloat(
CurrencyBalance.fromFloat(repayQuantity, pool.currency.decimals).toDecimal().mul(repayPrice),
pool.currency.decimals
)
if (!repayAmountBN.eq(financeAmountBN)) {
errors = setIn(errors, 'targetLoanPrice', "Finance amount doesn't equal borrow amount")

const error = validate(financeAmount)
if (error) {
if (selectedLoan && isExternalLoan(selectedLoan)) {
errors = setIn(errors, 'targetLoanPrice', error)
} else {
errors = setIn(errors, 'amount', error)
}
}

return errors
},
})
Expand Down Expand Up @@ -145,7 +151,9 @@ export function TransferDebtForm({ loan }: { loan: LoanType }) {
? Dec(form.values.price || 0)
.mul(Dec(form.values.faceValue || 0))
.div(loan.pricing.notional.toDecimal())
: Dec(form.values.amount || 0)
: selectedLoan && isExternalLoan(selectedLoan) ? Dec(form.values.targetLoanPrice || 0)
.mul(Dec(form.values.targetLoanFaceValue || 0))
.div(selectedLoan.pricing.notional.toDecimal()): Dec(form.values.amount || 0)

return (
<Stack as={Card} gap={2} p={2}>
Expand All @@ -171,7 +179,6 @@ export function TransferDebtForm({ loan }: { loan: LoanType }) {
form.setFieldValue('targetLoan', event.target.value)
}}
onBlur={field.onBlur}
errorMessage={meta.touched && meta.error ? meta.error : undefined}
value={field.value}
options={loans?.map((l) => ({ value: l.id, label: <LoanOption loan={l as Loan} key={l.id} /> })) ?? []}
placeholder="Select..."
Expand Down Expand Up @@ -200,7 +207,7 @@ export function TransferDebtForm({ loan }: { loan: LoanType }) {
</Text>
</Shelf>
</>
) : (
) : !selectedLoan || !isExternalLoan(selectedLoan) ? (
<Field name="amount" validate={(val: any) => validate(Dec(val || 0))}>
{({ field, meta, form }: FieldProps) => {
return (
Expand All @@ -215,22 +222,44 @@ export function TransferDebtForm({ loan }: { loan: LoanType }) {
)
}}
</Field>
)}
) : null}
{selectedLoan && isExternalLoan(selectedLoan) && (
<Field name="targetLoanPrice" validate={combine(settlementPrice(), maxPriceVariance(selectedLoan.pricing))}>
{({ field, meta, form }: FieldProps) => {
return (
<CurrencyInput
{...field}
label="Settlement price (settlement asset)"
errorMessage={meta.touched ? meta.error : undefined}
currency={pool.currency.symbol}
onChange={(value) => form.setFieldValue('targetLoanPrice', value)}
decimals={8}
/>
)
}}
</Field>
<>
<Field validate={combine(positiveNumber())} name="targetLoanFaceValue">
{({ field, meta, form }: FieldProps) => {
return (
<CurrencyInput
{...field}
label="Face value (settlement asset)"
errorMessage={meta.touched ? meta.error : undefined}
decimals={8}
onChange={(value) => form.setFieldValue('targetLoanFaceValue', value)}
currency={pool.currency.symbol}
/>
)
}}
</Field>
<Field name="targetLoanPrice" validate={combine(settlementPrice(), maxPriceVariance(selectedLoan.pricing))}>
{({ field, meta, form }: FieldProps) => {
return (
<CurrencyInput
{...field}
label="Settlement price (settlement asset)"
errorMessage={meta.touched ? meta.error : undefined}
currency={pool.currency.symbol}
onChange={(value) => form.setFieldValue('targetLoanPrice', value)}
decimals={8}
/>
)
}}
</Field>
<Shelf justifyContent="space-between">
<Text variant="emphasized">Total amount</Text>
<Text variant="emphasized">
{formatBalance(financeAmount, pool?.currency.symbol, 2)}
</Text>
</Shelf>
</>
)}
<Stack px={1}>
<Button type="submit" loading={isLoading}>
Expand Down

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