List-of-API-methods-used-in-condenser.md

+Results should look like below:
+```
+{
+  "api": "database_api",
+  "method": "set_subscribe_callback",
+  "params": ["callback", "clearFilter"]
+}, {
+  "api": "database_api",
+  "method": "set_pending_transaction_callback",
+  "params": ["cb"]
+}
+```
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