frostfs-node/pkg/innerring/processors/netmap/process_cleanup.go

package netmap

import (
	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
	"github.com/nspcc-dev/neofs-api-go/pkg/netmap"
	netmapEvent "github.com/nspcc-dev/neofs-node/pkg/morph/event/netmap"
	"go.uber.org/zap"
)

func (np *Processor) processNetmapCleanupTick(ev netmapCleanupTick) {
	if !np.alphabetState.IsAlphabet() {
		np.log.Info("non alphabet mode, ignore new netmap cleanup tick")

		return
	}

	err := np.netmapSnapshot.forEachRemoveCandidate(ev.epoch, func(s string) error {
		key, err := keys.NewPublicKeyFromString(s)
		if err != nil {
			np.log.Warn("can't decode public key of netmap node",
				zap.String("key", s))

			return nil
		}

		np.log.Info("vote to remove node from netmap", zap.String("key", s))

		if np.notaryDisabled {
			err = np.netmapClient.UpdatePeerState(key.Bytes(), netmap.NodeStateOffline)
		} else {
			// use epoch as TX nonce to prevent collisions
			err = np.netmapClient.Morph().NotaryInvoke(
				np.netmapClient.ContractAddress(),
				0,
				uint32(ev.epoch),
				netmapEvent.UpdateStateNotaryEvent,
				int64(netmap.NodeStateOffline.ToV2()),
				key.Bytes(),
			)
		}

		if err != nil {
			np.log.Error("can't invoke netmap.UpdateState", zap.Error(err))
		}

		return nil
	})
	if err != nil {
		np.log.Warn("can't iterate on netmap cleaner cache",
			zap.String("error", err.Error()))
	}
}