midterms: use null in static props

web/components/usa-map/state-election-map.tsx

@@ -59,13 +59,16 @@ const useUpdateContracts = (
     if (contracts.some((c) => c === undefined)) return
 
     // listen to contract updates
-    const unsubs = contracts.map((c, i) =>
+    const unsubs = contracts
-      listenForContract(
+      .filter((c) => !!c)
-        c.id,
+      .map((c, i) =>
-        (newC) =>
+        listenForContract(
-          newC && setContracts(setAt(contracts, i, newC as CPMMBinaryContract))
+          c.id,
+          (newC) =>
+            newC &&
+            setContracts(setAt(contracts, i, newC as CPMMBinaryContract))
+        )
       )
-    )
     return () => unsubs.forEach((u) => u())
   }, [contracts, setContracts])
 

web/pages/midterms.tsx

@@ -180,11 +180,15 @@ const governorMidterms: StateElectionMarket[] = [
 
 export async function getStaticProps() {
   const senateContracts = await Promise.all(
-    senateMidterms.map((m) => getContractFromSlug(m.slug))
+    senateMidterms.map((m) =>
+      getContractFromSlug(m.slug).then((c) => c ?? null)
+    )
   )
 
   const governorContracts = await Promise.all(
-    governorMidterms.map((m) => getContractFromSlug(m.slug))
+    governorMidterms.map((m) =>
+      getContractFromSlug(m.slug).then((c) => c ?? null)
+    )
   )
 
   return {