Add Elasticsearch support

core/exchanges/common.py

@@ -0,0 +1,18 @@
+from core.lib.elastic import store_msg
+
+
+def get_balance_hook(user_id, user_name, account_id, account_name, balance):
+    """
+    Called every time the balance is fetched on an account.
+    Store this into Elasticsearch.
+    """
+    store_msg(
+        "balances",
+        {
+            "user_id": user_id,
+            "user_name": user_name,
+            "account_id": account_id,
+            "account_name": account_name,
+            "balance": balance,
+        },
+    )