USD marks

cache.js

@@ -37,6 +37,10 @@ export class CacheDict {
     async contains(chain, key) {
         return await redis.hExists(`${chain}|${this.series}`, key)
     }
+
+    async items(chain) {
+        return Object.entries(await redis.hGetAll(`${chain}|${this.series}`)).map(([k, v]) => [k, v === null ? null : '' + v])
+    }
 }
 
 
@@ -83,3 +87,4 @@ export const vaultOpenOrders = new CacheDict('voo')
 export const vaultRecentlyClosedOrders = new CacheDict('vrco')
 export const orderFilled = new CacheDict('of')
 export const ohlcs = new CacheDict('ohlc')
+export const marks = new CacheDict('mark.usd')