frostfs-node/pkg/morph/event/netmap/update_peer.go

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package netmap
import (
"crypto/elliptic"
"fmt"
"git.frostfs.info/TrueCloudLab/frostfs-contract/netmap"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/client"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/event"
"github.com/nspcc-dev/neo-go/pkg/core/state"
"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
"github.com/nspcc-dev/neo-go/pkg/network/payload"
)
type UpdatePeer struct {
PubKey *keys.PublicKey
State netmap.NodeState
// For notary notifications only.
// Contains raw transactions of notary request.
Request *payload.P2PNotaryRequest
}
// MorphEvent implements Neo:Morph Event interface.
func (UpdatePeer) MorphEvent() {}
// Online returns true if node's state is requested to be switched
// to "online".
func (s UpdatePeer) Online() bool {
return s.State == netmap.NodeStateOnline
}
// Maintenance returns true if node's state is requested to be switched
// to "maintenance".
func (s UpdatePeer) Maintenance() bool {
return s.State == netmap.NodeStateMaintenance
}
func (s UpdatePeer) PublicKey() *keys.PublicKey {
return s.PubKey
}
// NotaryRequest returns raw notary request if notification
// was received via notary service. Otherwise, returns nil.
func (s UpdatePeer) NotaryRequest() *payload.P2PNotaryRequest {
return s.Request
}
func (s *UpdatePeer) decodeState(state int64) error {
switch s.State = netmap.NodeState(state); s.State {
default:
return fmt.Errorf("unsupported node state %d", state)
case
netmap.NodeStateOffline,
netmap.NodeStateOnline,
netmap.NodeStateMaintenance:
return nil
}
}
const expectedItemNumUpdatePeer = 2
func ParseUpdatePeer(e *state.ContainedNotificationEvent) (event.Event, error) {
var (
ev UpdatePeer
err error
)
params, err := event.ParseStackArray(e)
if err != nil {
return nil, fmt.Errorf("could not parse stack items from notify event: %w", err)
}
if ln := len(params); ln != expectedItemNumUpdatePeer {
return nil, event.WrongNumberOfParameters(expectedItemNumUpdatePeer, ln)
}
// parse public key
key, err := client.BytesFromStackItem(params[1])
if err != nil {
return nil, fmt.Errorf("could not get public key: %w", err)
}
ev.PubKey, err = keys.NewPublicKeyFromBytes(key, elliptic.P256())
if err != nil {
return nil, fmt.Errorf("could not parse public key: %w", err)
}
// parse node status
st, err := client.IntFromStackItem(params[0])
if err != nil {
return nil, fmt.Errorf("could not get node status: %w", err)
}
err = ev.decodeState(st)
if err != nil {
return nil, err
}
return ev, nil
}