frostfs-node/pkg/morph/client/netmap/wrapper/netmap.go

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2020-07-24 13:54:03 +00:00
package wrapper
import (
"fmt"
"github.com/nspcc-dev/neofs-api-go/pkg/netmap"
client "github.com/nspcc-dev/neofs-node/pkg/morph/client/netmap"
)
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// GetNetMap receives information list about storage nodes
// through the Netmap contract call, composes network map
// from them and returns it. With diff == 0 returns current
// network map, else return snapshot of previous network map.
func (w Wrapper) GetNetMap(diff uint64) (*netmap.Netmap, error) {
args := client.GetSnapshotArgs{}
args.SetDiff(diff)
vals, err := w.client.Snapshot(args)
if err != nil {
return nil, err
}
return unmarshalNetmap(vals.Peers())
}
// GetNetMapByEpoch receives information list about storage nodes
// through the Netmap contract call, composes network map
// from them and returns it. Returns snapshot of the specified epoch number.
func (w Wrapper) GetNetMapByEpoch(epoch uint64) (*netmap.Netmap, error) {
args := client.EpochSnapshotArgs{}
args.SetEpoch(epoch)
vals, err := w.client.EpochSnapshot(args)
if err != nil {
return nil, err
}
return unmarshalNetmap(vals.Peers())
}
// GetCandidates receives information list about candidates
// for the next epoch network map through the Netmap contract
// call, composes network map from them and returns it.
func (w Wrapper) GetCandidates() (*netmap.Netmap, error) {
args := client.GetNetMapCandidatesArgs{}
vals, err := w.client.Candidates(args)
if err != nil {
return nil, err
}
return unmarshalCandidates(vals.NetmapNodes())
}
func unmarshalNetmap(rawPeers [][]byte) (*netmap.Netmap, error) {
infos := make([]netmap.NodeInfo, 0, len(rawPeers))
for _, peer := range rawPeers {
nodeInfo := netmap.NewNodeInfo()
if err := nodeInfo.Unmarshal(peer); err != nil {
return nil, fmt.Errorf("can't unmarshal peer info: %w", err)
}
infos = append(infos, *nodeInfo)
}
nodes := netmap.NodesFromInfo(infos)
return netmap.NewNetmap(nodes)
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}
func unmarshalCandidates(rawCandidate []*client.PeerWithState) (*netmap.Netmap, error) {
candidates := make([]netmap.NodeInfo, 0, len(rawCandidate))
for _, candidate := range rawCandidate {
nodeInfo := netmap.NewNodeInfo()
if err := nodeInfo.Unmarshal(candidate.Peer()); err != nil {
return nil, fmt.Errorf("can't unmarshal peer info: %w", err)
}
switch candidate.State() {
case client.Online:
nodeInfo.SetState(netmap.NodeStateOnline)
case client.Offline:
nodeInfo.SetState(netmap.NodeStateOffline)
default:
nodeInfo.SetState(0)
}
candidates = append(candidates, *nodeInfo)
}
nodes := netmap.NodesFromInfo(candidates)
return netmap.NewNetmap(nodes)
}