re-establish subscriptions after ws disconnect

src/blockchain/ohlcs.js

@@ -17,6 +17,16 @@ export function subOHLC( chainId, pool, period ) {
 }
 
 
+export function refreshOHLCSubs() {
+    const keys = []
+    for (const key of Object.keys(ohlcSubCounts)) {
+        const [chainId, pool, period] = key.split('|')
+        keys.push(`${pool}|${period}`)
+    }
+    socket.emit('subOHLCs', chainId, keys)
+}
+
+
 export function unsubOHLC( chainId, pool, period ) {
     const key = `${pool}|${period}`
     const ckey = `${chainId}|${key}`