Trigger fix (#251)

## Description
<!--- Describe your changes -->

Three fixes for issues found.

1. Trigger drop wasn't executed correctly on setup-grest.sh deployment.
2. asset_cache_control.sql moved to its correct place in
01_cached_tables, wasn't deployed.
3. asset_nft_address endpoint didn't handle some edge case mint/burn
correctly.

---------

Co-authored-by: Scitz0 <[email protected]>

files/grest/rpc/assets/asset_nft_address.sql

@@ -23,14 +23,25 @@ BEGIN
     AND ma.name = _asset_name_decoded
     AND aic.total_supply = 1;
 
-  RETURN QUERY
-    SELECT address
-    FROM tx_out
-    WHERE id = (
-      SELECT MAX(tx_out_id)
-      FROM ma_tx_out
-      WHERE ident = _asset_id
-    );
+  IF EXISTS (SELECT * FROM ma_tx_mint WHERE ident = _asset_id and quantity < 0 LIMIT 1) THEN
+    RETURN QUERY
+      SELECT address
+      FROM tx_out
+      WHERE id = (
+        SELECT MAX(tx_out_id)
+        FROM ma_tx_out
+        WHERE ident = _asset_id
+      );
+  ELSE
+    RETURN QUERY
+      SELECT address
+      FROM tx_out
+      INNER JOIN ma_tx_out mto ON mto.tx_out_id = tx_out.id
+      WHERE mto.ident = _asset_id
+        AND tx_out.consumed_by_tx_in_id IS NULL
+      ORDER BY tx_out.id DESC
+      LIMIT 1;
+  END IF;
 END;
 $$;
 

files/grest/rpc/db-scripts/basics.sql

@@ -115,6 +115,11 @@ BEGIN
 END
 $do$;
 
+-- DROP EXISTING GREST ADDED TRIGGERS ON PUBLIC SCHEMA
+FOR r IN (SELECT trigger_name, event_object_table FROM information_schema.triggers WHERE trigger_schema = 'public' AND action_statement LIKE '%grest.%') LOOP
+  EXECUTE 'DROP TRIGGER IF EXISTS ' || quote_ident(r.trigger_name) || ' ON ' || quote_ident(r.event_object_table);
+END LOOP;
+
 -- HELPER FUNCTIONS --
 CREATE FUNCTION grest.get_query_pids_partial_match(_query text)
 RETURNS TABLE (

files/grest/rpc/db-scripts/reset_grest.sql

@@ -1,8 +1,3 @@
--- Drop triggers first that depend on grest.functions()
-SELECT 'DROP TRIGGER ' || trigger_name || ' ON ' || event_object_table || ';'
-FROM information_schema.triggers
-WHERE trigger_schema = 'public';
-
 -- Recreate grest schema
 DROP SCHEMA IF EXISTS grest CASCADE;