[#1524] neofs-node: Reuse boltdb config for different components

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>

cmd/neofs-node/config/engine/shard/boltdb/boltdb.go

@@ -0,0 +1,63 @@
+package boltdbconfig
+
+import (
+	"io/fs"
+	"time"
+
+	"github.com/nspcc-dev/neofs-node/cmd/neofs-node/config"
+)
+
+// Config is a wrapper over the config section
+// which provides access to boltdb specific parameters.
+type Config config.Config
+
+// config defaults
+const (
+	// PermDefault is a default permission bits for metabase file.
+	PermDefault = 0660
+)
+
+// Perm returns the value of "perm" config parameter as a fs.FileMode.
+//
+// Returns PermDefault if the value is not a positive number.
+func (x *Config) Perm() fs.FileMode {
+	p := config.UintSafe(
+		(*config.Config)(x),
+		"perm",
+	)
+
+	if p == 0 {
+		p = PermDefault
+	}
+
+	return fs.FileMode(p)
+}
+
+// MaxBatchDelay returns the value of "max_batch_delay" config parameter.
+//
+// Returns 0 if the value is not a positive number.
+func (x *Config) MaxBatchDelay() time.Duration {
+	d := config.DurationSafe((*config.Config)(x), "max_batch_delay")
+	if d < 0 {
+		d = 0
+	}
+	return d
+}
+
+// MaxBatchSize returns the value of "max_batch_size" config parameter.
+//
+// Returns 0 if the value is not a positive number.
+func (x *Config) MaxBatchSize() int {
+	s := int(config.IntSafe((*config.Config)(x), "max_batch_size"))
+	if s < 0 {
+		s = 0
+	}
+	return s
+}
+
+// NoSync returns the value of "no_sync" config parameter.
+//
+// Returns false if the value is not a boolean.
+func (x *Config) NoSync() bool {
+	return config.BoolSafe((*config.Config)(x), "no_sync")
+}