order placement doesnt crash

cache.js

@@ -30,6 +30,10 @@ export class CacheDict {
     async get(chain, key) {
         return await redis.hGet(`${chain}|${this.series}`, key)
     }
+
+    async contains(chain, key) {
+        return await redis.hExists(`${chain}|${this.series}`, key)
+    }
 }
 
 
@@ -52,6 +56,6 @@ async function latestBlock(chain) {
     return await blockCaches[chain].get()
 }
 
-export const vaults = new CacheSet('v')
+export const vaults = new CacheDict('v')
 export const vaultTokens = new CacheDict('vt')
 export const prices = new CacheDict('p')