[#1117] node: Introduce cache for frostfsid contract client

Signed-off-by: Airat Arifullin <a.arifullin@yadro.com>

cmd/frostfs-node/frostfsid.go

@@ -0,0 +1,71 @@
+package main
+
+import (
+	"time"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-contract/frostfsid/client"
+	frostfsidcore "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/frostfsid"
+	"github.com/hashicorp/golang-lru/v2/expirable"
+	"github.com/nspcc-dev/neo-go/pkg/util"
+)
+
+type morphFrostfsIDCache struct {
+	subjProvider frostfsidcore.SubjectProvider
+
+	subjCache *expirable.LRU[util.Uint160, *client.Subject]
+
+	subjExtCache *expirable.LRU[util.Uint160, *client.SubjectExtended]
+}
+
+func newMorphFrostfsIDCache(subjProvider frostfsidcore.SubjectProvider, size int, ttl time.Duration) frostfsidcore.SubjectProvider {
+	return &morphFrostfsIDCache{
+		subjProvider: subjProvider,
+
+		subjCache: expirable.NewLRU(size, func(util.Uint160, *client.Subject) {}, ttl),
+
+		subjExtCache: expirable.NewLRU(size, func(util.Uint160, *client.SubjectExtended) {}, ttl),
+	}
+}
+
+func (m *morphFrostfsIDCache) GetSubject(addr util.Uint160) (*client.Subject, error) {
+	result, found := m.subjCache.Get(addr)
+	if found {
+		return result, nil
+	}
+
+	result, err := m.subjProvider.GetSubject(addr)
+	if err != nil {
+		return nil, err
+	}
+
+	m.subjCache.Add(addr, result)
+	return result, nil
+}
+
+func (m *morphFrostfsIDCache) GetSubjectExtended(addr util.Uint160) (*client.SubjectExtended, error) {
+	subjExt, found := m.subjExtCache.Get(addr)
+	if found {
+		return subjExt, nil
+	}
+
+	var err error
+	subjExt, err = m.subjProvider.GetSubjectExtended(addr)
+	if err != nil {
+		return nil, err
+	}
+
+	m.subjExtCache.Add(addr, subjExt)
+	m.subjCache.Add(addr, subjectFromSubjectExtended(subjExt))
+
+	return subjExt, nil
+}
+
+func subjectFromSubjectExtended(subjExt *client.SubjectExtended) *client.Subject {
+	return &client.Subject{
+		PrimaryKey:     subjExt.PrimaryKey,
+		AdditionalKeys: subjExt.AdditionalKeys,
+		Namespace:      subjExt.Name,
+		Name:           subjExt.Name,
+		KV:             subjExt.KV,
+	}
+}