frostfs-node/pkg/services/object_manager/storagegroup/collect.go

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package storagegroup
import (
"github.com/nspcc-dev/neofs-node/pkg/core/object"
objutil "github.com/nspcc-dev/neofs-node/pkg/services/object/util"
"github.com/nspcc-dev/neofs-sdk-go/checksum"
cid "github.com/nspcc-dev/neofs-sdk-go/container/id"
addressSDK "github.com/nspcc-dev/neofs-sdk-go/object/address"
oidSDK "github.com/nspcc-dev/neofs-sdk-go/object/id"
"github.com/nspcc-dev/neofs-sdk-go/storagegroup"
"github.com/nspcc-dev/tzhash/tz"
)
// CollectMembers creates new storage group structure and fills it
// with information about members collected via HeadReceiver.
//
// Resulting storage group consists of physically stored objects only.
func CollectMembers(r objutil.HeadReceiver, cid *cid.ID, members []*oidSDK.ID) (*storagegroup.StorageGroup, error) {
var (
sumPhySize uint64
phyMembers []*oidSDK.ID
phyHashes [][]byte
addr = addressSDK.NewAddress()
sg = storagegroup.New()
)
addr.SetContainerID(cid)
for i := range members {
addr.SetObjectID(members[i])
if err := objutil.IterateAllSplitLeaves(r, addr, func(leaf *object.Object) {
phyMembers = append(phyMembers, leaf.ID())
sumPhySize += leaf.PayloadSize()
phyHashes = append(phyHashes, leaf.PayloadHomomorphicHash().Sum())
}); err != nil {
return nil, err
}
}
sumHash, err := tz.Concat(phyHashes)
if err != nil {
return nil, err
}
cs := checksum.New()
tzHash := [64]byte{}
copy(tzHash[:], sumHash)
cs.SetTillichZemor(tzHash)
sg.SetMembers(phyMembers)
sg.SetValidationDataSize(sumPhySize)
sg.SetValidationDataHash(cs)
return sg, nil
}