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

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2020-07-24 13:54:03 +00:00
package wrapper
import (
"github.com/nspcc-dev/neofs-api-go/pkg/netmap"
v2netmap "github.com/nspcc-dev/neofs-api-go/v2/netmap"
grpcNetmap "github.com/nspcc-dev/neofs-api-go/v2/netmap/grpc"
client "github.com/nspcc-dev/neofs-node/pkg/morph/client/netmap"
"github.com/pkg/errors"
)
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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)
peers, err := w.client.Snapshot(args)
if err != nil {
return nil, err
}
rawPeers := peers.Peers() // slice of serialized node infos
infos := make([]v2netmap.NodeInfo, 0, len(rawPeers))
for _, peer := range rawPeers {
grpcNodeInfo := new(grpcNetmap.NodeInfo) // transport representation of struct
err = grpcNodeInfo.Unmarshal(peer)
if err != nil {
// consider unmarshalling into different major versions
// of NodeInfo structure, if there any
return nil, errors.Wrap(err, "can't unmarshal peer info")
}
v2 := v2netmap.NodeInfoFromGRPCMessage(grpcNodeInfo)
infos = append(infos, *v2)
}
nodes := netmap.NodesFromV2(infos)
return netmap.NewNetmap(nodes)
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}