USD marks

chain.js

@@ -1,4 +1,15 @@
 import fs from "fs";
+import {marks} from "./cache.js";
 
 export const chainInfo = JSON.parse(fs.readFileSync('../contract/version.json')).chainInfo
 console.log('chainInfo', chainInfo)
+
+export async function joinChain( socket, chainId ) {
+    if (socket.chainId)
+        socket.leave(socket.chainId)
+    socket.join(chainId)
+    socket.chainId = chainId
+    const items = await marks.items(chainId);
+    for (let [token,mark] of items)
+        socket.emit('mark.usd', chainId, token, mark)
+}