114 lines
3.4 KiB
Go
114 lines
3.4 KiB
Go
// Copyright (C) 2019 Storj Labs, Inc.
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// See LICENSE for copying information.
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package bwagreement
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import (
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"context"
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"time"
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"github.com/zeebo/errs"
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"go.uber.org/zap"
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monkit "gopkg.in/spacemonkeygo/monkit.v2"
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"storj.io/storj/pkg/auth"
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"storj.io/storj/pkg/identity"
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"storj.io/storj/pkg/pb"
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"storj.io/storj/pkg/storj"
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)
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var (
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// Error the default bwagreement errs class
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Error = errs.Class("bwagreement error")
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mon = monkit.Package()
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)
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// Config is a configuration struct that is everything you need to start an
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// agreement receiver responsibility
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type Config struct {
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}
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// DB stores bandwidth agreements.
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type DB interface {
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// CreateAgreement adds a new bandwidth agreement.
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CreateAgreement(context.Context, string, Agreement) error
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// GetAgreements gets all bandwidth agreements.
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GetAgreements(context.Context) ([]Agreement, error)
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// GetAgreementsSince gets all bandwidth agreements since specific time.
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GetAgreementsSince(context.Context, time.Time) ([]Agreement, error)
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}
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// Server is an implementation of the pb.BandwidthServer interface
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type Server struct {
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db DB
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NodeID storj.NodeID
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logger *zap.Logger
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}
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// Agreement is a struct that contains a bandwidth agreement and the associated signature
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type Agreement struct {
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Agreement []byte
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Signature []byte
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CreatedAt time.Time
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ExpiresAt time.Time
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}
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// NewServer creates instance of Server
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func NewServer(db DB, logger *zap.Logger, nodeID storj.NodeID) *Server {
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// TODO: reorder arguments, rename logger -> log
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return &Server{db: db, logger: logger, NodeID: nodeID}
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}
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// Close closes resources
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func (s *Server) Close() error { return nil }
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// BandwidthAgreements receives and stores bandwidth agreements from storage nodes
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func (s *Server) BandwidthAgreements(ctx context.Context, rba *pb.RenterBandwidthAllocation) (reply *pb.AgreementsSummary, err error) {
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defer mon.Task()(&ctx)(&err)
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s.logger.Debug("Received Agreement...")
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reply = &pb.AgreementsSummary{
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Status: pb.AgreementsSummary_REJECTED,
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}
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rbad, pba, pbad, err := rba.Unpack()
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if err != nil {
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return reply, err
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}
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//verify message content
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pi, err := identity.PeerIdentityFromContext(ctx)
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if err != nil || rbad.StorageNodeId != pi.ID {
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return reply, auth.BadID.New("Storage Node ID: %s vs %s", rbad.StorageNodeId, pi.ID)
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}
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//todo: use whitelist for uplinks?
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if pbad.SatelliteId != s.NodeID {
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return reply, pb.Payer.New("Satellite ID: %s vs %s", pbad.SatelliteId, s.NodeID)
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}
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serialNum := pbad.GetSerialNumber() + rbad.StorageNodeId.String()
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if len(pbad.SerialNumber) == 0 {
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return reply, pb.Payer.Wrap(pb.Missing.New("Serial"))
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}
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exp := time.Unix(pbad.GetExpirationUnixSec(), 0).UTC()
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if exp.Before(time.Now().UTC()) {
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return reply, pb.Payer.Wrap(auth.Expired.New("%v vs %v", exp, time.Now().UTC()))
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}
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//verify message crypto
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if err := auth.VerifyMsg(rba, pbad.UplinkId); err != nil {
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return reply, pb.Renter.Wrap(err)
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}
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if err := auth.VerifyMsg(pba, pbad.SatelliteId); err != nil {
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return reply, pb.Payer.Wrap(err)
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}
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//save and return rersults
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err = s.db.CreateAgreement(ctx, serialNum, Agreement{
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Signature: rba.GetSignature(),
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Agreement: rba.GetData(),
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ExpiresAt: exp,
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})
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if err != nil {
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//todo: better classify transport errors (AgreementsSummary_FAIL) vs logical (AgreementsSummary_REJECTED)
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return reply, pb.Payer.Wrap(auth.Serial.Wrap(err))
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}
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reply.Status = pb.AgreementsSummary_OK
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s.logger.Debug("Stored Agreement...")
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return reply, nil
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}
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