From 0c5fc271f06ca14931b0faee2148d7b5764db9b2 Mon Sep 17 00:00:00 2001
From: LukasDeco <ldeconantsesznak@gmail.com>
Date: Tue, 20 Aug 2024 21:33:24 -0600
Subject: [PATCH] fix: calc jup quote decimals swapped around

---
 .../jupiter/jupiter-quotes-indexer.ts         | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

diff --git a/packages/indexer/src/indexers/jupiter/jupiter-quotes-indexer.ts b/packages/indexer/src/indexers/jupiter/jupiter-quotes-indexer.ts
index 68a98582..8a62c1a3 100644
--- a/packages/indexer/src/indexers/jupiter/jupiter-quotes-indexer.ts
+++ b/packages/indexer/src/indexers/jupiter/jupiter-quotes-indexer.ts
@@ -74,11 +74,11 @@ const convertJupTokenPrice = (
 
 const convertJupBaseOutTokenPrice = (
   data: JupTokenQuoteRes,
-  inputTokenDecimals: number,
-  outputTokenDecimals: number
+  quoteTokenDecimals: number,
+  baseTokenDecimals: number
 ): number => {
-  const inPrice = Number(data.inAmount ?? "0") / 10 ** inputTokenDecimals;
-  const outPrice = Number(data.outAmount ?? "0") / 10 ** outputTokenDecimals;
+  const inPrice = Number(data.inAmount ?? "0") / 10 ** quoteTokenDecimals;
+  const outPrice = Number(data.outAmount ?? "0") / 10 ** baseTokenDecimals;
   return inPrice / outPrice;
 };
 
@@ -174,10 +174,17 @@ export const fetchQuoteFromJupe = async (
 
     const bidPrice = convertJupBaseOutTokenPrice(
       bidJson,
-      baseToken[0].decimals,
-      quoteToken[0].decimals
+      quoteToken[0].decimals,
+      baseToken[0].decimals
     );
 
+    if (!askPrice) {
+      return [bidPrice, askJson.contextSlot];
+    }
+    if (!bidPrice) {
+      return [askPrice, askJson.contextSlot];
+    }
+
     // Calculate the mid-price
     const midPrice = (askPrice + bidPrice) / 2;