From fe1265810d8cc0fa97881401757ab317be2825e7 Mon Sep 17 00:00:00 2001
From: avraham <briansakal@gmail.com>
Date: Sun, 11 Aug 2024 17:38:04 -0400
Subject: [PATCH] fix: the "optiondb-lmdbx" calendardb was returning too many
 possible strike-front-back permutations due to faulty programming

---
 server/src/calendardb/optiondb-lmdbx.ts | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/server/src/calendardb/optiondb-lmdbx.ts b/server/src/calendardb/optiondb-lmdbx.ts
index 60af0c9..5fbc747 100644
--- a/server/src/calendardb/optiondb-lmdbx.ts
+++ b/server/src/calendardb/optiondb-lmdbx.ts
@@ -68,14 +68,22 @@ function makeCalendarDatabase(): CalendarDatabase {
       return optionContracts.flatMap(
         (frontOptionContract, i, optionContracts) =>
           optionContracts
-            .filter((_, j) => i !== j)
+            .filter(
+              (potientialBackOptionContract) =>
+                frontOptionContract.strike ===
+                  potientialBackOptionContract.strike &&
+                frontOptionContract.type ===
+                  potientialBackOptionContract.type &&
+                frontOptionContract.expirationDate <
+                  potientialBackOptionContract.expirationDate
+            )
             .map((backOptionContract) => ({
               symbol,
               frontExpirationDate: frontOptionContract.expirationDate,
               backExpirationDate: backOptionContract.expirationDate,
               strike: frontOptionContract.strike,
               type: frontOptionContract.type,
-            })),
+            }))
       );
     },
     getAggregates: async ({