frostfs-node/cmd/neofs-node/reputation/intermediate/remote.go
Pavel Karpy 20b7295087 [#488] reputation/router: Add commentaries and TODO
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
2021-05-04 17:53:02 +03:00

122 lines
3.3 KiB
Go

package intermediate
import (
"crypto/ecdsa"
apiClient "github.com/nspcc-dev/neofs-api-go/pkg/client"
reputationapi "github.com/nspcc-dev/neofs-api-go/pkg/reputation"
"github.com/nspcc-dev/neofs-node/cmd/neofs-node/reputation/common"
"github.com/nspcc-dev/neofs-node/pkg/services/reputation"
reputationcommon "github.com/nspcc-dev/neofs-node/pkg/services/reputation/common"
eigentrustcalc "github.com/nspcc-dev/neofs-node/pkg/services/reputation/eigentrust/calculator"
)
// RemoteProviderPrm groups the required parameters of the RemoteProvider's constructor.
//
// 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 RemoteProviderPrm struct {
Key *ecdsa.PrivateKey
}
// NewRemoteProvider creates a new instance of the RemoteProvider.
//
// Panics if at least one value of the parameters is invalid.
//
// The created RemoteProvider does not require additional
// initialization and is completely ready for work.
func NewRemoteProvider(prm RemoteProviderPrm) *RemoteProvider {
switch {
case prm.Key == nil:
common.PanicOnPrmValue("NetMapSource", prm.Key)
}
return &RemoteProvider{
key: prm.Key,
}
}
// RemoteProvider is an implementation of the clientKeyRemoteProvider interface.
type RemoteProvider struct {
key *ecdsa.PrivateKey
}
func (rp RemoteProvider) WithClient(c apiClient.Client) reputationcommon.WriterProvider {
return &TrustWriterProvider{
client: c,
key: rp.key,
}
}
type TrustWriterProvider struct {
client apiClient.Client
key *ecdsa.PrivateKey
}
func (twp *TrustWriterProvider) InitWriter(ctx reputationcommon.Context) (reputationcommon.Writer, error) {
eiContext, ok := ctx.(eigentrustcalc.Context)
if !ok {
// TODO: think if this can be done without such limitation
panic(ErrIncorrectContextPanicMsg)
}
return &RemoteTrustWriter{
eiCtx: eiContext,
client: twp.client,
key: twp.key,
}, nil
}
type RemoteTrustWriter struct {
eiCtx eigentrustcalc.Context
client apiClient.Client
key *ecdsa.PrivateKey
buf []*apiClient.SendIntermediateTrustPrm
}
// Write check if passed context contains required
// data(returns ErrIncorrectContext if not) and
// caches passed trusts(as SendIntermediateTrustPrm structs).
func (rtp *RemoteTrustWriter) Write(t reputation.Trust) error {
apiTrustingPeer := reputationapi.NewPeerID()
apiTrustingPeer.SetPublicKey(t.TrustingPeer())
apiTrustedPeer := reputationapi.NewPeerID()
apiTrustedPeer.SetPublicKey(t.Peer())
apiTrust := reputationapi.NewTrust()
apiTrust.SetValue(t.Value().Float64())
apiTrust.SetPeer(apiTrustedPeer)
apiPeerToPeerTrust := reputationapi.NewPeerToPeerTrust()
apiPeerToPeerTrust.SetTrustingPeer(apiTrustingPeer)
apiPeerToPeerTrust.SetTrust(apiTrust)
p := &apiClient.SendIntermediateTrustPrm{}
p.SetEpoch(rtp.eiCtx.Epoch())
p.SetIteration(rtp.eiCtx.I())
p.SetTrust(apiPeerToPeerTrust)
rtp.buf = append(rtp.buf, p)
return nil
}
// Close sends all cached intermediate trusts.
// If error occurs, returns in immediately and stops iteration.
func (rtp *RemoteTrustWriter) Close() (err error) {
for _, prm := range rtp.buf {
_, err = rtp.client.SendIntermediateTrust(
rtp.eiCtx,
*prm,
apiClient.WithKey(rtp.key),
)
if err != nil {
return
}
}
return
}