fix: lmdbx optiondb `getAggregateSync()` returned `tsStart = undefined`

server/src/optiondb/lmdbx.ts

@@ -28,8 +28,8 @@ function makeOptionContractDatabase(): OptionContractDatabase {
         start: [symbol, expirationDate, strike, type, startOfDayUnix],
         end: [symbol, expirationDate, strike, type, endOfDayUnix],
       })
-      .map(({ value }) => ({
-        tsStart: value.tsStart,
+      .map(({ key, value }) => ({
+        tsStart: key[4],
         open: value.open,
         close: value.close,
         high: value.high,
@@ -73,7 +73,7 @@ function makeOptionContractDatabase(): OptionContractDatabase {
               aggregate.key.strike,
               aggregate.key.type,
             ],
-            null,
+            null
           );
         }
       });
@@ -92,7 +92,7 @@ function makeOptionContractDatabase(): OptionContractDatabase {
               close: aggregate.close,
               high: aggregate.high,
               low: aggregate.low,
-            },
+            }
           );
         }
       });
@@ -101,7 +101,7 @@ function makeOptionContractDatabase(): OptionContractDatabase {
       key: { symbol, strike, type, expirationDate },
     }) => {
       const startOfLastHourUnix = new Date(
-        `${expirationDate}T00:00:00Z`,
+        `${expirationDate}T00:00:00Z`
       ).valueOf();
       const endOfLastHourUnix = startOfLastHourUnix + 3600 * 1000;
       let minPrice = 0;