From f218ed750ccbd3a34f6593d71dc83f31566c0888 Mon Sep 17 00:00:00 2001
From: JP Angelle <jp@k-f.co>
Date: Tue, 19 Sep 2023 21:09:28 -0500
Subject: [PATCH] fix average settlement price

---
 .../src/pages/Loan/HoldingsValues.tsx         | 53 +++++++++++--------
 centrifuge-app/src/pages/Loan/index.tsx       |  6 ++-
 centrifuge-app/src/utils/usePools.ts          |  8 ++-
 3 files changed, 43 insertions(+), 24 deletions(-)

diff --git a/centrifuge-app/src/pages/Loan/HoldingsValues.tsx b/centrifuge-app/src/pages/Loan/HoldingsValues.tsx
index 9dc23b12a1..0d6621fc71 100644
--- a/centrifuge-app/src/pages/Loan/HoldingsValues.tsx
+++ b/centrifuge-app/src/pages/Loan/HoldingsValues.tsx
@@ -1,20 +1,20 @@
 import { BorrowerTransaction, CurrencyBalance, Pool } from '@centrifuge/centrifuge-js'
 import BN from 'bn.js'
 import { LabelValueStack } from '../../components/LabelValueStack'
-import { Dec } from '../../utils/Decimal'
 import { formatBalance } from '../../utils/formatting'
 
 type Props = {
   pool: Pool
   transactions?: BorrowerTransaction[] | null
+  currentFace: CurrencyBalance
 }
 
-export function HoldingsValues({ pool, transactions }: Props) {
+export function HoldingsValues({ pool, transactions, currentFace }: Props) {
   const netSpent =
     transactions?.reduce((sum, trx) => {
       if (trx.type === 'REPAID') {
         sum = new CurrencyBalance(
-          sum.sub(
+          sum.add(
             trx.amount && trx.settlementPrice
               ? new BN(trx.amount.mul(new BN(trx.settlementPrice).mul(new BN(100)))).div(
                   new BN(10).pow(new BN(pool.currency.decimals))
@@ -27,7 +27,7 @@ export function HoldingsValues({ pool, transactions }: Props) {
 
       if (trx.type === 'BORROWED') {
         sum = new CurrencyBalance(
-          sum.add(
+          sum.sub(
             trx.amount && trx.settlementPrice
               ? new BN(trx.amount.mul(new BN(trx.settlementPrice).mul(new BN(100)))).div(
                   new BN(10).pow(new BN(pool.currency.decimals))
@@ -41,22 +41,31 @@ export function HoldingsValues({ pool, transactions }: Props) {
       return sum
     }, new CurrencyBalance(0, pool.currency.decimals)) || new CurrencyBalance(0, pool.currency.decimals)
 
-  const currentFace =
-    transactions?.reduce((sum, trx) => {
-      if (trx.type === 'BORROWED') {
-        sum = new CurrencyBalance(
-          sum.add(trx.amount ? new BN(trx.amount).mul(new BN(100)) : new CurrencyBalance(0, pool.currency.decimals)),
-          pool.currency.decimals
-        )
-      }
-      if (trx.type === 'REPAID') {
-        sum = new CurrencyBalance(
-          sum.sub(trx.amount ? new BN(trx.amount).mul(new BN(100)) : new CurrencyBalance(0, pool.currency.decimals)),
-          pool.currency.decimals
-        )
-      }
-      return sum
-    }, new CurrencyBalance(0, pool.currency.decimals)) || new CurrencyBalance(0, pool.currency.decimals)
+  const getAverageSettlePrice = () => {
+    const settlementTransactions =
+      transactions?.reduce((sum, trx) => {
+        if (!new BN(trx.settlementPrice || 0).isZero()) {
+          sum = sum.add(new BN(1))
+        }
+        return sum
+      }, new BN(0)) || new BN(0)
+
+    if (settlementTransactions.isZero()) {
+      return new CurrencyBalance(0, pool.currency.decimals)
+    }
+
+    return (
+      transactions?.reduce((sum, trx) => {
+        if (!new BN(trx.settlementPrice || 0).isZero()) {
+          sum = new CurrencyBalance(
+            sum.add(trx.settlementPrice ? new BN(trx.settlementPrice) : new CurrencyBalance(0, pool.currency.decimals)),
+            pool.currency.decimals
+          )
+        }
+        return sum
+      }, new CurrencyBalance(0, pool.currency.decimals)) || new CurrencyBalance(0, pool.currency.decimals)
+    ).div(settlementTransactions)
+  }
 
   return (
     <>
@@ -71,10 +80,10 @@ export function HoldingsValues({ pool, transactions }: Props) {
       <LabelValueStack
         label="Average settle price"
         value={
-          netSpent.isZero()
+          getAverageSettlePrice().isZero()
             ? '-'
             : `${formatBalance(
-                Dec(netSpent.toNumber()).div(Dec(currentFace.toNumber())).mul(100),
+                new CurrencyBalance(getAverageSettlePrice().mul(new BN(100)), pool.currency.decimals),
                 pool.currency.symbol,
                 2,
                 2
diff --git a/centrifuge-app/src/pages/Loan/index.tsx b/centrifuge-app/src/pages/Loan/index.tsx
index ff8469afb6..15fac6eb31 100644
--- a/centrifuge-app/src/pages/Loan/index.tsx
+++ b/centrifuge-app/src/pages/Loan/index.tsx
@@ -232,7 +232,11 @@ const Loan: React.FC<{ setShowOraclePricing?: () => void }> = ({ setShowOraclePr
           {'valuationMethod' in loan.pricing && loan.pricing.valuationMethod === 'oracle' && (
             <PageSection title={<Box>Holdings</Box>}>
               <Shelf gap={6} flexWrap="wrap">
-                <HoldingsValues pool={pool as Pool} transactions={borrowerAssetTransactions} />
+                <HoldingsValues
+                  pool={pool as Pool}
+                  transactions={borrowerAssetTransactions}
+                  currentFace={currentFace}
+                />
               </Shelf>
             </PageSection>
           )}
diff --git a/centrifuge-app/src/utils/usePools.ts b/centrifuge-app/src/utils/usePools.ts
index 0f138d1173..f4a5d3aa1f 100644
--- a/centrifuge-app/src/utils/usePools.ts
+++ b/centrifuge-app/src/utils/usePools.ts
@@ -88,7 +88,13 @@ export function useAverageAmount(poolId: string) {
   const pool = usePool(poolId)
   const loans = useLoans(poolId)
 
-  if (!loans || !pool || !borrowerTransactions) return new BN(0)
+  if (
+    !loans?.length ||
+    !pool ||
+    !borrowerTransactions ||
+    !('valuationMethod' in loans[0].pricing && loans[0].pricing.valuationMethod === 'oracle')
+  )
+    return new BN(0)
 
   const getLatestPrice = (assetId: string) => {
     const pricing = loans.find((loan) => loan.id === assetId)?.pricing as ExternalPricingInfo