package main import ( "bytes" "encoding/hex" netmapcore "github.com/nspcc-dev/neofs-node/pkg/core/netmap" "github.com/nspcc-dev/neofs-node/pkg/services/reputation" trustcontroller "github.com/nspcc-dev/neofs-node/pkg/services/reputation/local/controller" truststorage "github.com/nspcc-dev/neofs-node/pkg/services/reputation/local/storage" "github.com/nspcc-dev/neofs-node/pkg/util/logger" "github.com/pkg/errors" "go.uber.org/zap" ) type localTrustStorage struct { log *logger.Logger storage *truststorage.Storage nmSrc netmapcore.Source localKey []byte } type localTrustIterator struct { ctx trustcontroller.Context storage *localTrustStorage epochStorage *truststorage.EpochTrustValueStorage } func (s *localTrustStorage) InitIterator(ctx trustcontroller.Context) (trustcontroller.Iterator, error) { epochStorage, err := s.storage.DataForEpoch(ctx.Epoch()) if err != nil && !errors.Is(err, truststorage.ErrNoPositiveTrust) { return nil, err } return &localTrustIterator{ ctx: ctx, storage: s, epochStorage: epochStorage, }, nil } func (it *localTrustIterator) Iterate(h reputation.TrustHandler) error { if it.epochStorage != nil { err := it.epochStorage.Iterate(h) if !errors.Is(err, truststorage.ErrNoPositiveTrust) { return err } } nm, err := it.storage.nmSrc.GetNetMapByEpoch(it.ctx.Epoch()) if err != nil { return err } // find out if local node is presented in netmap localIndex := -1 for i := range nm.Nodes { if bytes.Equal(nm.Nodes[i].PublicKey(), it.storage.localKey) { localIndex = i } } ln := len(nm.Nodes) if localIndex >= 0 && ln > 0 { ln-- } // calculate Pj http://ilpubs.stanford.edu:8090/562/1/2002-56.pdf Chapter 4.5. p := reputation.TrustOne.Div(reputation.TrustValueFromInt(ln)) for i := range nm.Nodes { if i == localIndex { continue } trust := reputation.Trust{} trust.SetPeer(reputation.PeerIDFromBytes(nm.Nodes[i].PublicKey())) trust.SetValue(p) if err := h(trust); err != nil { return err } } return nil } func (s *localTrustStorage) InitWriter(ctx trustcontroller.Context) (trustcontroller.Writer, error) { return &localTrustLogger{ ctx: ctx, log: s.log, }, nil } type localTrustLogger struct { ctx trustcontroller.Context log *logger.Logger } func (l *localTrustLogger) Write(t reputation.Trust) error { l.log.Info("new local trust", zap.Uint64("epoch", l.ctx.Epoch()), zap.String("peer", hex.EncodeToString(t.Peer().Bytes())), zap.Stringer("value", t.Value()), ) return nil } func (*localTrustLogger) Close() error { return nil }