Merge pull request #157 from blocknative/fix/balance-subscription

Make sure balance subscription is only called when value changes.

Closes #155

Author: lnbc1QWFyb24

src/stores.ts

@@ -204,8 +204,8 @@ function createBalanceStore(initialState: string | null): BalanceStore {
 
             emitterAddress = $address
           }
-        } else {
-          // no address, so set balance back to null
+        } else if (emitterAddress && !$address) {
+          // no address, so set balance to undefined
           set && set(undefined)
         }
       }