vault infinite loop fix

src/blockchain/wallet.js

@@ -101,18 +101,10 @@ function discoverVaults(owner) {
   if( owner === null )
     s.vaults = []
   else
-    _discoverVaults(owner).then((result)=>{
-      if( s.account === owner ) { // double-check the account since it could have changed during our await
-        s.vaults = result
-        if( pendingOrders.length )
-          if( result.length )
-            flushOrders(result[0])
-          else
-            ensureVault2(s.chainId.value, owner, 0)
-      }
-    })
+    doDiscoverVaults.invoke(owner)
 }
 
+const doDiscoverVaults = new SingletonCoroutine(_discoverVaults, 50, false)
 async function _discoverVaults(owner) {
   console.log('_discoverVaults',owner)
   const result = []
@@ -135,7 +127,14 @@ async function _discoverVaults(owner) {
   catch (e) {
     console.log(`no vault ${num}`, e)
   }
-  return result
+  if( s.account === owner ) { // double-check the account since it could have changed during our await
+    s.vaults = result
+    if( pendingOrders.length )
+      if( result.length )
+        flushOrders(result[0])
+      else
+        ensureVault2(s.chainId.value, owner, 0)
+  }
 }