seg rm-state: delete .tmp files from snapshot directories

cmd/utils/app/snapshots_cmd.go

@@ -866,6 +866,33 @@ func DeleteStateSnapshots(dirs datadir.Dirs, removeLatest, promptUserBeforeDelet
 		removed++
 	}
 	fmt.Printf("removed %d state snapshot segments files\n", removed)
+
+	// Unconditionally remove .tmp files from all snapshot directories.
+	// These are artifacts from incomplete/cancelled operations and should always be cleaned up.
+	var removedTmp uint64
+	for _, dirPath := range []string{dirs.Snap, dirs.SnapIdx, dirs.SnapHistory, dirs.SnapDomain, dirs.SnapAccessors, dirs.SnapCaplin, dirs.SnapForkable} {
+		tmpFiles, err := snaptype.TmpFiles(dirPath)
+		if err != nil {
+			return err
+		}
+		for _, tmpFile := range tmpFiles {
+			if dryRun {
+				fmt.Printf("[dry-run] rm %s\n", tmpFile)
+				removedTmp++
+				continue
+			}
+			if err := dir2.RemoveFile(tmpFile); err != nil {
+				if !errors.Is(err, fs.ErrNotExist) {
+					return err
+				}
+			}
+			removedTmp++
+		}
+	}
+	if removedTmp > 0 {
+		fmt.Printf("removed %d .tmp files\n", removedTmp)
+	}
+
 	fmt.Printf("\n\nBefore restarting Erigon, run one of:\n  - `integration stage_custom_trace --reset` if deleted domains are handled by stage_custom_trace\n  - `integration stage_exec --reset` otherwise\nThis prunes DB remnants to avoid gaps between snapshots and DB.\n")
 	return nil
 }

cmd/utils/app/snapshots_cmd_test.go

@@ -18,6 +18,7 @@ package app
 
 import (
 	"os"
+	"path/filepath"
 	"testing"
 
 	"github.com/erigontech/erigon/db/datadir"
@@ -177,3 +178,84 @@ func createFiles(t *testing.T, dirs datadir.Dirs, from, to int, b *bundle) {
 	genFile(b.history)
 	genFile(b.ii)
 }
+
+func Test_DeleteStateSnaps_RemovesTmpFiles(t *testing.T) {
+	dirs := datadir.New(t.TempDir())
+
+	// Create some normal state snapshot files so DeleteStateSnapshots has something to process
+	b := bundle{}
+	dc := statecfg.Schema.ReceiptDomain
+	b.domain, b.history, b.ii = state.SnapSchemaFromDomainCfg(dc, dirs, 10)
+	for i := 0; i < 3; i++ {
+		createFiles(t, dirs, i*10, (i+1)*10, &b)
+	}
+
+	touchFile := func(path string) {
+		f, err := os.OpenFile(path, os.O_RDONLY|os.O_CREATE, 0644)
+		require.NoError(t, err)
+		f.Close()
+	}
+
+	// SnapForkable is not auto-created by datadir.New, so create it manually
+	require.NoError(t, os.MkdirAll(dirs.SnapForkable, 0755))
+
+	// Create .tmp files in all snapshot directories (matching patterns from issue #18789)
+	tmpFiles := []string{
+		filepath.Join(dirs.Snap, "v1.1-headers.0-500.seg.123456.tmp"),
+		filepath.Join(dirs.SnapDomain, "v1.1-commitment.8272-8280.kv.252752124.tmp"),
+		filepath.Join(dirs.SnapHistory, "v2.0-commitment.8256-8272.kvi.857462302.tmp"),
+		filepath.Join(dirs.SnapIdx, "v1.1-storage.8256-8288.bt.209594880.tmp"),
+		filepath.Join(dirs.SnapAccessors, "v2.0-commitment.8256-8272.kvi.3646922560.existence.tmp"),
+		filepath.Join(dirs.SnapCaplin, "v1.0-beaconblocks.0-100.seg.999999.tmp"),
+		filepath.Join(dirs.SnapForkable, "v1.0-forkable.0-100.kv.111111.tmp"),
+	}
+	for _, tf := range tmpFiles {
+		touchFile(tf)
+		confirmExist(t, tf)
+	}
+
+	// Run DeleteStateSnapshots (non-dry-run)
+	err := DeleteStateSnapshots(dirs, true, false, false, "")
+	require.NoError(t, err)
+
+	// All .tmp files should be removed
+	for _, tf := range tmpFiles {
+		confirmDoesntExist(t, tf)
+	}
+}
+
+func Test_DeleteStateSnaps_DryRunKeepsTmpFiles(t *testing.T) {
+	dirs := datadir.New(t.TempDir())
+
+	// Create some normal state snapshot files
+	b := bundle{}
+	dc := statecfg.Schema.ReceiptDomain
+	b.domain, b.history, b.ii = state.SnapSchemaFromDomainCfg(dc, dirs, 10)
+	for i := 0; i < 3; i++ {
+		createFiles(t, dirs, i*10, (i+1)*10, &b)
+	}
+
+	touchFile := func(path string) {
+		f, err := os.OpenFile(path, os.O_RDONLY|os.O_CREATE, 0644)
+		require.NoError(t, err)
+		f.Close()
+	}
+
+	// Create .tmp files
+	tmpFiles := []string{
+		filepath.Join(dirs.SnapDomain, "v1.1-commitment.8272-8280.kv.252752124.tmp"),
+		filepath.Join(dirs.SnapHistory, "v2.0-commitment.8256-8272.kvi.857462302.tmp"),
+	}
+	for _, tf := range tmpFiles {
+		touchFile(tf)
+	}
+
+	// Run DeleteStateSnapshots with dry-run=true
+	err := DeleteStateSnapshots(dirs, true, false, true, "")
+	require.NoError(t, err)
+
+	// .tmp files should still exist (dry-run does not delete)
+	for _, tf := range tmpFiles {
+		confirmExist(t, tf)
+	}
+}