fix migration down

backend/migrations/000035_add_contract_permissions.down.sql

@@ -1 +1,22 @@
-DROP TABLE IF EXISTS Contracts;
+DO $$ 
+DECLARE 
+    permission_id INT;
+BEGIN
+    -- Revert 'Invest in the certificate'
+    SELECT id INTO permission_id FROM Permission WHERE name = 'Invest in the certificate';
+    DELETE FROM RolePermissionJunction WHERE permission_id = permission_id;
+    DELETE FROM Operation WHERE permission_id = permission_id;
+    DELETE FROM Permission WHERE id = permission_id;
+
+    -- Revert 'Create wallet'
+    SELECT id INTO permission_id FROM Permission WHERE name = 'Create wallet';
+    DELETE FROM RolePermissionJunction WHERE permission_id = permission_id;
+    DELETE FROM Operation WHERE permission_id = permission_id;
+    DELETE FROM Permission WHERE id = permission_id;
+
+    -- Revert 'Create certificates'
+    SELECT id INTO permission_id FROM Permission WHERE name = 'Create certificates';
+    DELETE FROM RolePermissionJunction WHERE permission_id = permission_id;
+    DELETE FROM Operation WHERE permission_id = permission_id;
+    DELETE FROM Permission WHERE id = permission_id;
+END $$;