From 84c231757bd93036e678814fea1f03f977d81cbd Mon Sep 17 00:00:00 2001
From: Roman Khimov <roman@nspcc.ru>
Date: Thu, 12 May 2022 12:03:54 +0300
Subject: [PATCH] compare-states: return 0 in case state matches

---
 scripts/compare-states/compare-states.go | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/scripts/compare-states/compare-states.go b/scripts/compare-states/compare-states.go
index 0fdb12181..c90c1b954 100644
--- a/scripts/compare-states/compare-states.go
+++ b/scripts/compare-states/compare-states.go
@@ -13,6 +13,8 @@ import (
 	"github.com/urfave/cli"
 )
 
+var errStateMatches = errors.New("state matches")
+
 func initClient(addr string, name string) (*client.Client, uint32, error) {
 	c, err := client.New(context.Background(), addr, client.Options{})
 	if err != nil {
@@ -57,7 +59,7 @@ func bisectState(ca *client.Client, cb *client.Client, h uint32) (uint32, error)
 	}
 	fmt.Printf("at %d: %s vs %s\n", h, ra.StringLE(), rb.StringLE())
 	if ra.Equals(rb) {
-		return 0, fmt.Errorf("state matches at %d", h)
+		return 0, fmt.Errorf("%w at %d", errStateMatches, h)
 	}
 	bad := h
 	for bad-good > 1 {
@@ -98,6 +100,9 @@ func cliMain(c *cli.Context) error {
 	}
 	h, err := bisectState(ca, cb, ha-1)
 	if err != nil {
+		if errors.Is(err, errStateMatches) {
+			return nil
+		}
 		return err
 	}
 	blk, err := ca.GetBlockByIndex(h)