[#488] reputation: Change Writer interface

Includes:
- Delete first `ctx` argument in `Write` method.
- Move intermediate Initial trust struct and method
to `calculator` file.
- Change Alpha to 0.1.

Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>

cmd/neofs-node/reputation.go

@@ -37,7 +37,8 @@ import (
 	"go.uber.org/zap"
 )
 
-const EigenTrustAlpha = 0.5
+const EigenTrustAlpha = 0.1
+const EigenTrustInitialTrust = 0.5
 
 func initReputationService(c *cfg) {
 	staticClient, err := client.NewStatic(
@@ -60,9 +61,7 @@ func initReputationService(c *cfg) {
 
 	// storing calculated trusts as a daughter
 	c.cfgReputation.localTrustStorage = truststorage.New(
-		truststorage.Prm{
+		truststorage.Prm{},
-			LocalServer: c,
-		},
 	)
 
 	daughterStorage := daughters.New(daughters.Prm{})
@@ -154,7 +153,9 @@ func initReputationService(c *cfg) {
 			AlphaProvider: intermediate.AlphaProvider{
 				Alpha: EigenTrustAlpha,
 			},
-			InitialTrustSource:      intermediatereputation.InitialTrustSource{},
+			InitialTrustSource: intermediatereputation.InitialTrustSource{
+				Trust: reputation.TrustValueFromFloat64(EigenTrustInitialTrust),
+			},
 			IntermediateValueTarget: intermediateTrustRouter,
 			WorkerPool:              c.cfgReputation.workerPool,
 			FinalResultTarget: intermediate.NewFinalWriterProvider(
@@ -298,12 +299,9 @@ func (s *reputationServer) SendIntermediateResult(ctx context.Context, req *v2re
 
 	body := req.GetBody()
 
-	eCtx := &common.EpochContext{
+	eiCtx := eigentrust.NewIterContext(ctx, body.GetEpoch(), body.GetIteration())
-		Context: ctx,
-		E:       body.GetEpoch(),
-	}
 
-	w, err := s.intermediateRouter.InitWriter(reputationrouter.NewRouteContext(eCtx, passedRoute))
+	w, err := s.intermediateRouter.InitWriter(reputationrouter.NewRouteContext(eiCtx, passedRoute))
 	if err != nil {
 		return nil, errors.Wrap(err, "could not initialize intermediate trust writer")
 	}
@@ -312,9 +310,7 @@ func (s *reputationServer) SendIntermediateResult(ctx context.Context, req *v2re
 
 	trust := apiToLocalTrust(v2Trust.GetTrust(), v2Trust.GetTrustingPeer().GetValue())
 
-	eiCtx := eigentrust.NewIterContext(ctx, body.GetEpoch(), body.GetIteration())
+	err = w.Write(trust)
-
-	err = w.Write(eiCtx, trust)
 	if err != nil {
 		return nil, errors.Wrap(err, "could not write intermediate trust")
 	}
@@ -332,7 +328,7 @@ func (s *reputationServer) processLocalTrust(epoch uint64, t reputation.Trust,
 		return errors.Wrap(err, "wrong route of reputation trust value")
 	}
 
-	return w.Write(&common.EpochContext{E: epoch}, t)
+	return w.Write(t)
 }
 
 // apiToLocalTrust converts v2 Trust to local reputation.Trust, adding trustingPeer.

cmd/neofs-node/reputation/common/util.go

@@ -3,7 +3,6 @@ package common
 import (
 	"context"
 	"fmt"
-	"github.com/nspcc-dev/neofs-node/pkg/services/reputation/common"
 
 	"github.com/nspcc-dev/neofs-node/pkg/services/reputation"
 )
@@ -20,7 +19,7 @@ func (ctx *EpochContext) Epoch() uint64 {
 
 type NopReputationWriter struct{}
 
-func (NopReputationWriter) Write(common.Context, reputation.Trust) error {
+func (NopReputationWriter) Write(reputation.Trust) error {
 	return nil
 }
 

cmd/neofs-node/reputation/intermediate/calculator.go

@@ -1,11 +1,23 @@
 package intermediate
 
 import (
+	"github.com/nspcc-dev/neofs-node/pkg/services/reputation"
 	"github.com/nspcc-dev/neofs-node/pkg/services/reputation/eigentrust"
 	eigencalc "github.com/nspcc-dev/neofs-node/pkg/services/reputation/eigentrust/calculator"
 	eigentrustctrl "github.com/nspcc-dev/neofs-node/pkg/services/reputation/eigentrust/controller"
 )
 
+// InitialTrustSource is implementation of the
+// reputation/eigentrust/calculator's InitialTrustSource interface.
+type InitialTrustSource struct {
+	Trust reputation.TrustValue
+}
+
+// InitialTrust returns `initialTrust` as initial trust value.
+func (i InitialTrustSource) InitialTrust(reputation.PeerID) (reputation.TrustValue, error) {
+	return i.Trust, nil
+}
+
 // DaughtersTrustCalculator wraps EigenTrust calculator and implements
 // eigentrust/calculator's DaughtersTrustCalculator interface.
 type DaughtersTrustCalculator struct {

cmd/neofs-node/reputation/intermediate/consumers.go

@@ -1,10 +1,7 @@
 package intermediate
 
 import (
-	"errors"
-
 	"github.com/nspcc-dev/neofs-node/pkg/services/reputation"
-	"github.com/nspcc-dev/neofs-node/pkg/services/reputation/common"
 	reputationcommon "github.com/nspcc-dev/neofs-node/pkg/services/reputation/common"
 	"github.com/nspcc-dev/neofs-node/pkg/services/reputation/eigentrust"
 	eigencalc "github.com/nspcc-dev/neofs-node/pkg/services/reputation/eigentrust/calculator"
@@ -12,7 +9,7 @@ import (
 	"github.com/nspcc-dev/neofs-node/pkg/util/logger"
 )
 
-var ErrIncorrectContext = errors.New("could not write intermediate trust: passed context incorrect")
+var ErrIncorrectContextPanicMsg = "could not write intermediate trust: passed context incorrect"
 
 // ConsumerStorageWriterProvider is implementation of reputation.WriterProvider
 // interface that provides ConsumerTrustWriter writer.
@@ -27,18 +24,14 @@ type ConsumerStorageWriterProvider struct {
 type ConsumerTrustWriter struct {
 	log     *logger.Logger
 	storage *consumerstorage.Storage
+	eiCtx   eigencalc.Context
 }
 
-func (w *ConsumerTrustWriter) Write(ctx common.Context, t reputation.Trust) error {
+func (w *ConsumerTrustWriter) Write(t reputation.Trust) error {
-	eiCtx, ok := ctx.(eigencalc.Context)
-	if !ok {
-		return ErrIncorrectContext
-	}
-
 	trust := eigentrust.IterationTrust{Trust: t}
 
-	trust.SetEpoch(eiCtx.Epoch())
+	trust.SetEpoch(w.eiCtx.Epoch())
-	trust.SetI(eiCtx.I())
+	trust.SetI(w.eiCtx.I())
 
 	w.storage.Put(trust)
 	return nil
@@ -48,9 +41,15 @@ func (w *ConsumerTrustWriter) Close() error {
 	return nil
 }
 
-func (s *ConsumerStorageWriterProvider) InitWriter(_ reputationcommon.Context) (reputationcommon.Writer, error) {
+func (s *ConsumerStorageWriterProvider) InitWriter(ctx reputationcommon.Context) (reputationcommon.Writer, error) {
+	eiCtx, ok := ctx.(eigencalc.Context)
+	if !ok {
+		panic(ErrIncorrectContextPanicMsg)
+	}
+
 	return &ConsumerTrustWriter{
 		log:     s.Log,
 		storage: s.Storage,
+		eiCtx:   eiCtx,
 	}, nil
 }

cmd/neofs-node/reputation/intermediate/daughters.go

@@ -2,7 +2,6 @@ package intermediate
 
 import (
 	"github.com/nspcc-dev/neofs-node/pkg/services/reputation"
-	"github.com/nspcc-dev/neofs-node/pkg/services/reputation/common"
 	reputationcommon "github.com/nspcc-dev/neofs-node/pkg/services/reputation/common"
 	"github.com/nspcc-dev/neofs-node/pkg/services/reputation/eigentrust/storage/daughters"
 	"github.com/nspcc-dev/neofs-node/pkg/util/logger"
@@ -21,10 +20,11 @@ type DaughterStorageWriterProvider struct {
 type DaughterTrustWriter struct {
 	log     *logger.Logger
 	storage *daughters.Storage
+	ctx     reputationcommon.Context
 }
 
-func (w *DaughterTrustWriter) Write(ctx common.Context, t reputation.Trust) error {
+func (w *DaughterTrustWriter) Write(t reputation.Trust) error {
-	w.storage.Put(ctx.Epoch(), t)
+	w.storage.Put(w.ctx.Epoch(), t)
 	return nil
 }
 
@@ -32,9 +32,10 @@ func (w *DaughterTrustWriter) Close() error {
 	return nil
 }
 
-func (s *DaughterStorageWriterProvider) InitWriter(_ reputationcommon.Context) (reputationcommon.Writer, error) {
+func (s *DaughterStorageWriterProvider) InitWriter(ctx reputationcommon.Context) (reputationcommon.Writer, error) {
 	return &DaughterTrustWriter{
 		log:     s.Log,
 		storage: s.Storage,
+		ctx:     ctx,
 	}, nil
 }

cmd/neofs-node/reputation/intermediate/remote.go

@@ -55,15 +55,20 @@ type TrustWriterProvider struct {
 }
 
 func (twp *TrustWriterProvider) InitWriter(ctx reputationcommon.Context) (reputationcommon.Writer, error) {
+	eiContext, ok := ctx.(eigentrustcalc.Context)
+	if !ok {
+		panic(ErrIncorrectContextPanicMsg)
+	}
+
 	return &RemoteTrustWriter{
-		ctx:    ctx,
+		eiCtx:  eiContext,
 		client: twp.client,
 		key:    twp.key,
 	}, nil
 }
 
 type RemoteTrustWriter struct {
-	ctx    reputationcommon.Context
+	eiCtx  eigentrustcalc.Context
 	client apiClient.Client
 	key    *ecdsa.PrivateKey
 
@@ -73,12 +78,7 @@ type RemoteTrustWriter struct {
 // Write check if passed context contains required
 // data(returns ErrIncorrectContext if not) and
 // caches passed trusts(as SendIntermediateTrustPrm structs).
-func (rtp *RemoteTrustWriter) Write(ctx reputationcommon.Context, t reputation.Trust) error {
+func (rtp *RemoteTrustWriter) Write(t reputation.Trust) error {
-	eiContext, ok := ctx.(eigentrustcalc.Context)
-	if !ok {
-		return ErrIncorrectContext
-	}
-
 	apiTrustingPeer := reputationapi.NewPeerID()
 	apiTrustingPeer.SetPublicKey(t.TrustingPeer())
 
@@ -94,8 +94,8 @@ func (rtp *RemoteTrustWriter) Write(ctx reputationcommon.Context, t reputation.T
 	apiPeerToPeerTrust.SetTrust(apiTrust)
 
 	p := &apiClient.SendIntermediateTrustPrm{}
-	p.SetEpoch(eiContext.Epoch())
+	p.SetEpoch(rtp.eiCtx.Epoch())
-	p.SetIteration(eiContext.I())
+	p.SetIteration(rtp.eiCtx.I())
 	p.SetTrust(apiPeerToPeerTrust)
 
 	rtp.buf = append(rtp.buf, p)
@@ -108,7 +108,7 @@ func (rtp *RemoteTrustWriter) Write(ctx reputationcommon.Context, t reputation.T
 func (rtp *RemoteTrustWriter) Close() (err error) {
 	for _, prm := range rtp.buf {
 		_, err = rtp.client.SendIntermediateTrust(
-			rtp.ctx,
+			rtp.eiCtx,
 			*prm,
 			apiClient.WithKey(rtp.key),
 		)

cmd/neofs-node/reputation/intermediate/storage.go

@@ -9,15 +9,6 @@ import (
 	"github.com/nspcc-dev/neofs-node/pkg/services/reputation/eigentrust/storage/daughters"
 )
 
-// InitialTrustSource is implementation of the
-// reputation/eigentrust/calculator's InitialTrustSource interface.
-type InitialTrustSource struct{}
-
-// InitialTrust returns `1` as initial trust value.
-func (i InitialTrustSource) InitialTrust(reputation.PeerID) (reputation.TrustValue, error) {
-	return reputation.TrustOne, nil
-}
-
 // DaughterTrustIteratorProvider is implementation of the
 // reputation/eigentrust/calculator's DaughterTrustIteratorProvider interface.
 type DaughterTrustIteratorProvider struct {

cmd/neofs-node/reputation/local/remote.go

@@ -69,7 +69,7 @@ type RemoteTrustWriter struct {
 	buf []*reputationapi.Trust
 }
 
-func (rtp *RemoteTrustWriter) Write(_ reputationcommon.Context, t reputation.Trust) error {
+func (rtp *RemoteTrustWriter) Write(t reputation.Trust) error {
 	apiTrust := reputationapi.NewTrust()
 
 	apiPeer := reputationapi.NewPeerID()

pkg/services/reputation/common/deps.go

@@ -29,7 +29,7 @@ type Writer interface {
 	// Close operation.
 	//
 	// Write must not be called after Close.
-	Write(Context, reputation.Trust) error
+	Write(reputation.Trust) error
 
 	// Close exits with method-providing Writer.
 	//

pkg/services/reputation/common/router/calls.go

@@ -65,7 +65,7 @@ func (r *Router) InitWriter(ctx common.Context) (common.Writer, error) {
 	}, nil
 }
 
-func (w *trustWriter) Write(ctx common.Context, t reputation.Trust) error {
+func (w *trustWriter) Write(t reputation.Trust) error {
 	w.routeMtx.Lock()
 	defer w.routeMtx.Unlock()
 
@@ -94,7 +94,7 @@ func (w *trustWriter) Write(ctx common.Context, t reputation.Trust) error {
 				continue
 			}
 
-			remoteWriter, err = provider.InitWriter(w.ctx)
+			remoteWriter, err = provider.InitWriter(w.ctx.Context)
 			if err != nil {
 				w.router.log.Debug("could not initialize writer",
 					zap.String("error", err.Error()),
@@ -106,7 +106,7 @@ func (w *trustWriter) Write(ctx common.Context, t reputation.Trust) error {
 			w.mServers[endpoint] = remoteWriter
 		}
 
-		err := remoteWriter.Write(ctx, t)
+		err := remoteWriter.Write(t)
 		if err != nil {
 			w.router.log.Debug("could not write the value",
 				zap.String("error", err.Error()),

pkg/services/reputation/eigentrust/calculator/calls.go

@@ -195,7 +195,7 @@ func (c *Calculator) iterateDaughter(p iterDaughterPrm) {
 
 			trust.SetValue(val)
 
-			err := intermediateWriter.Write(p.ctx, trust)
+			err := intermediateWriter.Write(trust)
 			if err != nil {
 				c.opts.log.Debug("write intermediate value failure",
 					zap.String("error", err.Error()),
@@ -257,7 +257,7 @@ func (c *Calculator) sendInitialValues(ctx Context) {
 			initTrust.Mul(trust.Value())
 			trust.SetValue(initTrust)
 
-			err = intermediateWriter.Write(ctx, trust)
+			err = intermediateWriter.Write(trust)
 			if err != nil {
 				c.opts.log.Debug("write intermediate value failure",
 					zap.String("error", err.Error()),

pkg/services/reputation/local/controller/calls.go

@@ -126,7 +126,7 @@ func (c *reportContext) report() {
 				return err
 			}
 
-			return targetWriter.Write(c.ctx, t)
+			return targetWriter.Write(t)
 		},
 	)
 	if err != nil && !errors.Is(err, context.Canceled) {

pkg/services/reputation/local/storage/storage.go

@@ -9,7 +9,7 @@ import (
 // All values must comply with the requirements imposed on them.
 // Passing incorrect parameter values will result in constructor
 // failure (error or panic depending on the implementation).
-type Prm struct {}
+type Prm struct{}
 
 // Storage represents in-memory storage of
 // local reputation values.