Exemplo n.º 1
0
// NewBFTCoSiProtocol returns a new bftcosi struct
func NewBFTCoSiProtocol(n *onet.TreeNodeInstance, verify VerificationFunction) (*ProtocolBFTCoSi, error) {
	// initialize the bftcosi node/protocol-instance
	bft := &ProtocolBFTCoSi{
		TreeNodeInstance: n,
		collectStructs: collectStructs{
			prepare: cosi.NewCosi(n.Suite(), n.Private(), n.Roster().Publics()),
			commit:  cosi.NewCosi(n.Suite(), n.Private(), n.Roster().Publics()),
		},
		verifyChan:           make(chan bool),
		VerificationFunction: verify,
		threshold:            (len(n.Tree().List()) + 1) * 2 / 3,
		Msg:                  make([]byte, 0),
		Data:                 make([]byte, 0),
	}

	idx, _ := n.Roster().Search(bft.ServerIdentity().ID)
	bft.index = idx

	// Registering channels.
	err := bft.RegisterChannels(&bft.announceChan,
		&bft.challengePrepareChan, &bft.challengeCommitChan,
		&bft.commitChan, &bft.responseChan)
	if err != nil {
		return nil, err
	}

	n.OnDoneCallback(bft.nodeDone)

	return bft, nil
}
Exemplo n.º 2
0
// NewProtocol returns a ProtocolCosi with the node set with the right channels.
// Use this function like this:
// ```
// round := NewRound****()
// fn := func(n *onet.Node) onet.ProtocolInstance {
//      pc := NewProtocolCosi(round,n)
//		return pc
// }
// onet.RegisterNewProtocolName("cothority",fn)
// ```
func NewProtocol(node *onet.TreeNodeInstance) (onet.ProtocolInstance, error) {
	var err error
	// XXX just need to take care to take the global list of cosigners once we
	// do the exception stuff
	publics := make([]abstract.Point, len(node.Roster().List))
	for i, e := range node.Roster().List {
		publics[i] = e.Public
	}

	c := &CoSi{
		cosi:             cosi.NewCosi(node.Suite(), node.Private(), publics),
		TreeNodeInstance: node,
		done:             make(chan bool),
		tempCommitLock:   new(sync.Mutex),
		tempResponseLock: new(sync.Mutex),
	}
	// Register the channels we want to register and listens on

	if err := node.RegisterChannel(&c.announce); err != nil {
		return c, err
	}
	if err := node.RegisterChannel(&c.commit); err != nil {
		return c, err
	}
	if err := node.RegisterChannel(&c.challenge); err != nil {
		return c, err
	}
	if err := node.RegisterChannel(&c.response); err != nil {
		return c, err
	}

	return c, err
}