fix: add migration to remove old chainwatch schema constraints

.gitignore

@@ -15,5 +15,6 @@
 # vendor/
 .idea
 visor
+sentinel-visor
 
 build/.*

storage/migrations/4_drop_chainwatch_constraints.go

@@ -0,0 +1,37 @@
+package migrations
+
+import (
+	"github.com/go-pg/migrations/v8"
+)
+
+// Schema version 4 removes foreign key constraints from the original chainwatch schema which interfere with parallel inserts
+
+func init() {
+
+	up := batch(`
+ALTER TABLE public.drand_block_entries DROP CONSTRAINT IF EXISTS block_drand_entries_drand_entries_round_fk;
+ALTER TABLE public.drand_block_entries DROP CONSTRAINT IF EXISTS blocks_block_cids_cid_fk;
+
+ALTER TABLE public.blocks_synced DROP CONSTRAINT IF EXISTS blocks_block_cids_cid_fk;
+
+ALTER TABLE public.block_headers DROP CONSTRAINT IF EXISTS blocks_block_cids_cid_fk;
+
+ALTER TABLE public.block_parents DROP CONSTRAINT IF EXISTS blocks_block_cids_cid_fk;
+
+ALTER TABLE public.block_messages DROP CONSTRAINT IF EXISTS blocks_block_cids_cid_fk;
+
+ALTER TABLE public.minerid_dealid_sectorid DROP CONSTRAINT IF EXISTS sectors_sector_ids_id_fk;
+ALTER TABLE public.minerid_dealid_sectorid DROP CONSTRAINT IF EXISTS minerid_dealid_sectorid_sector_id_fkey;
+
+ALTER TABLE public.actors DROP CONSTRAINT IF EXISTS id_address_map_actors_id_fk;
+
+ALTER TABLE public.mpool_messages DROP CONSTRAINT IF EXISTS mpool_messages_messages_cid_fk;
+`)
+
+	// Note that it is infeasble to add these constraints back after they have been removed since they will almost certainly fail
+	// to be met, especially since we do not populate block_cids table any more.
+	down := batch("SELECT 1;")
+
+	migrations.MustRegisterTx(up, down)
+
+}