forked from TrueCloudLab/frostfs-node
55 lines
1.5 KiB
Go
55 lines
1.5 KiB
Go
package wrapper
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import (
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"github.com/nspcc-dev/neofs-api-go/pkg/netmap"
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client "github.com/nspcc-dev/neofs-node/pkg/morph/client/netmap"
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"github.com/pkg/errors"
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)
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// GetNetMap receives information list about storage nodes
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// through the Netmap contract call, composes network map
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// from them and returns it. With diff == 0 returns current
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// network map, else return snapshot of previous network map.
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func (w Wrapper) GetNetMap(diff uint64) (*netmap.Netmap, error) {
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args := client.GetSnapshotArgs{}
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args.SetDiff(diff)
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vals, err := w.client.Snapshot(args)
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if err != nil {
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return nil, err
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}
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return unmarshalNetmap(vals.Peers())
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}
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// GetNetMapByEpoch receives information list about storage nodes
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// through the Netmap contract call, composes network map
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// from them and returns it. Returns snapshot of the specified epoch number.
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func (w Wrapper) GetNetMapByEpoch(epoch uint64) (*netmap.Netmap, error) {
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args := client.EpochSnapshotArgs{}
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args.SetEpoch(epoch)
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vals, err := w.client.EpochSnapshot(args)
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if err != nil {
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return nil, err
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}
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return unmarshalNetmap(vals.Peers())
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}
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func unmarshalNetmap(rawPeers [][]byte) (*netmap.Netmap, error) {
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infos := make([]netmap.NodeInfo, 0, len(rawPeers))
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for _, peer := range rawPeers {
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nodeInfo := netmap.NewNodeInfo()
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if err := nodeInfo.Unmarshal(peer); err != nil {
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return nil, errors.Wrap(err, "can't unmarshal peer info")
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}
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infos = append(infos, *nodeInfo)
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}
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nodes := netmap.NodesFromInfo(infos)
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return netmap.NewNetmap(nodes)
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}
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