From cd9215a8b18922ec13976594b5f91dc59b48ebc1 Mon Sep 17 00:00:00 2001
From: aarshkshah1992 <aarshkshah1992@gmail.com>
Date: Wed, 1 May 2024 14:35:09 +0530
Subject: [PATCH] migrate to version 5

---
 chain/events/filter/index.go | 40 +++++++++++++++++++++++++++++++++---
 1 file changed, 37 insertions(+), 3 deletions(-)

diff --git a/chain/events/filter/index.go b/chain/events/filter/index.go
index 533d5371a05..9bf7213c82f 100644
--- a/chain/events/filter/index.go
+++ b/chain/events/filter/index.go
@@ -72,6 +72,7 @@ var ddls = []string{
 	`INSERT OR IGNORE INTO _meta (version) VALUES (2)`,
 	`INSERT OR IGNORE INTO _meta (version) VALUES (3)`,
 	`INSERT OR IGNORE INTO _meta (version) VALUES (4)`,
+	`INSERT OR IGNORE INTO _meta (version) VALUES (5)`,
 }
 
 var (
@@ -79,7 +80,7 @@ var (
 )
 
 const (
-	schemaVersion = 4
+	schemaVersion = 5
 
 	eventExists          = `SELECT MAX(id) FROM event WHERE height=? AND tipset_key=? AND tipset_key_cid=? AND emitter_addr=? AND event_index=? AND message_cid=? AND message_index=?`
 	insertEvent          = `INSERT OR IGNORE INTO event(height, tipset_key, tipset_key_cid, emitter_addr, event_index, message_cid, message_index, reverted) VALUES(?, ?, ?, ?, ?, ?, ?, ?)`
@@ -356,6 +357,28 @@ func (ei *EventIndex) migrateToVersion4(ctx context.Context) error {
 		}
 	}
 
+	if _, err = tx.Exec("INSERT OR IGNORE INTO _meta (version) VALUES (4)"); err != nil {
+		return xerrors.Errorf("increment _meta version: %w", err)
+	}
+
+	err = tx.Commit()
+	if err != nil {
+		return xerrors.Errorf("commit transaction: %w", err)
+	}
+
+	log.Infof("Successfully migrated event index from version 3 to version 4 in %s", time.Since(now))
+	return nil
+}
+
+func (ei *EventIndex) migrateToVersion5(ctx context.Context) error {
+	now := time.Now()
+
+	tx, err := ei.db.BeginTx(ctx, nil)
+	if err != nil {
+		return xerrors.Errorf("begin transaction: %w", err)
+	}
+	defer func() { _ = tx.Rollback() }()
+
 	stmtEventIndexUpdate, err := tx.PrepareContext(ctx, "UPDATE event SET event_index = (SELECT COUNT(*) FROM event e2 WHERE e2.tipset_key_cid = event.tipset_key_cid AND e2.id <= event.id) - 1")
 	if err != nil {
 		return xerrors.Errorf("prepare stmtEventIndexUpdate: %w", err)
@@ -366,7 +389,8 @@ func (ei *EventIndex) migrateToVersion4(ctx context.Context) error {
 		return xerrors.Errorf("update event index: %w", err)
 	}
 
-	if _, err = tx.Exec("INSERT OR IGNORE INTO _meta (version) VALUES (4)"); err != nil {
+	_, err = tx.ExecContext(ctx, "INSERT OR IGNORE INTO _meta (version) VALUES (5)")
+	if err != nil {
 		return xerrors.Errorf("increment _meta version: %w", err)
 	}
 
@@ -377,7 +401,7 @@ func (ei *EventIndex) migrateToVersion4(ctx context.Context) error {
 
 	ei.vacuumDBAndCheckpointWAL(ctx)
 
-	log.Infof("Successfully migrated event index from version 3 to version 4 in %s", time.Since(now))
+	log.Infof("Successfully migrated event index from version 4 to version 5 in %s", time.Since(now))
 	return nil
 }
 
@@ -462,6 +486,16 @@ func NewEventIndex(ctx context.Context, path string, chainStore *store.ChainStor
 			version = 4
 		}
 
+		if version == 4 {
+			log.Infof("Upgrading event index from version 4 to version 5")
+			err = eventIndex.migrateToVersion5(ctx)
+			if err != nil {
+				_ = db.Close()
+				return nil, xerrors.Errorf("could not migrate event index schema from version 4 to version 5: %w", err)
+			}
+			version = 5
+		}
+
 		if version != schemaVersion {
 			_ = db.Close()
 			return nil, xerrors.Errorf("invalid database version: got %d, expected %d", version, schemaVersion)