frostfs-node/pkg/services/control/server/netmap_snapshot.go

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package control
import (
"context"
netmapAPI "github.com/nspcc-dev/neofs-api-go/pkg/netmap"
"github.com/nspcc-dev/neofs-node/pkg/services/control"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
// NetmapSnapshot reads network map snapshot from Netmap storage.
func (s *Server) NetmapSnapshot(ctx context.Context, req *control.NetmapSnapshotRequest) (*control.NetmapSnapshotResponse, error) {
// verify request
if err := s.isValidRequest(req); err != nil {
return nil, status.Error(codes.PermissionDenied, err.Error())
}
// get current epoch
epoch, err := s.netMapSrc.Epoch()
if err != nil {
return nil, status.Error(codes.NotFound, err.Error())
}
apiNetMap, err := s.netMapSrc.GetNetMapByEpoch(epoch)
if err != nil {
return nil, status.Error(codes.NotFound, err.Error())
}
nm := new(control.Netmap)
nm.SetEpoch(epoch)
nm.SetNodes(nodesFromAPI(apiNetMap.Nodes))
// create and fill response
resp := new(control.NetmapSnapshotResponse)
body := new(control.NetmapSnapshotResponse_Body)
resp.SetBody(body)
body.SetNetmap(nm)
// sign the response
if err := SignMessage(s.key, resp); err != nil {
return nil, status.Error(codes.Internal, err.Error())
}
return resp, nil
}
func nodesFromAPI(apiNodes netmapAPI.Nodes) []*control.NodeInfo {
nodes := make([]*control.NodeInfo, 0, len(apiNodes))
for _, apiNode := range apiNodes {
node := new(control.NodeInfo)
node.SetPublicKey(apiNode.PublicKey())
node.SetAddress(apiNode.Address())
node.SetAttributes(attributesFromAPI(apiNode.Attributes()))
node.SetState(stateFromAPI(apiNode.State()))
nodes = append(nodes, node)
}
return nodes
}
func stateFromAPI(s netmapAPI.NodeState) control.NetmapStatus {
switch s {
default:
return control.NetmapStatus_STATUS_UNDEFINED
case netmapAPI.NodeStateOffline:
return control.NetmapStatus_OFFLINE
case netmapAPI.NodeStateOnline:
return control.NetmapStatus_ONLINE
}
}
func attributesFromAPI(apiAttrs []*netmapAPI.NodeAttribute) []*control.NodeInfo_Attribute {
attrs := make([]*control.NodeInfo_Attribute, 0, len(apiAttrs))
for _, apiAttr := range apiAttrs {
a := new(control.NodeInfo_Attribute)
a.SetKey(apiAttr.Key())
a.SetValue(apiAttr.Value())
apiParents := apiAttr.ParentKeys()
parents := make([]string, 0, len(apiParents))
for i := range apiParents {
parents = append(parents, apiParents[i])
}
a.SetParents(parents)
attrs = append(attrs, a)
}
return attrs
}