// Start announces the new block to sign
func (nt *Ntree) Start() error {
log.Lvl3(nt.Name(), "Start()")
go byzcoin.VerifyBlock(nt.block, "", "", nt.verifyBlockChan)
for _, tn := range nt.Children() {
if err := nt.SendTo(tn, &BlockAnnounce{nt.block}); err != nil {
return err
}
}
return nil
}
// listen will select on the differents channels
func (nt *Ntree) listen() {
for {
select {
// Dispatch the block through the whole tree
case msg := <-nt.announceChan:
log.Lvl3(nt.Name(), "Received Block announcement")
nt.block = msg.BlockAnnounce.Block
// verify the block
go byzcoin.VerifyBlock(nt.block, "", "", nt.verifyBlockChan)
if nt.IsLeaf() {
nt.startBlockSignature()
continue
}
for _, tn := range nt.Children() {
err := nt.SendTo(tn, &msg.BlockAnnounce)
if err != nil {
log.Error(nt.Name(),
"couldn't send to", tn.Name(),
err)
}
}
// generate your own signature / exception and pass that up to the
// root
case msg := <-nt.blockSignatureChan:
nt.handleBlockSignature(&msg.NaiveBlockSignature)
// Dispatch the signature + expcetion made before through the whole
// tree
case msg := <-nt.roundSignatureRequestChan:
log.Lvl3(nt.Name(), " Signature Request Received")
go nt.verifySignatureRequest(&msg.RoundSignatureRequest)
if nt.IsLeaf() {
nt.startSignatureResponse()
continue
}
for _, tn := range nt.Children() {
err := nt.SendTo(tn, &msg.RoundSignatureRequest)
if err != nil {
log.Error(nt.Name(), "couldn't sent to",
tn.Name(), err)
}
}
// Decide if we want to sign this or not
case msg := <-nt.roundSignatureResponseChan:
nt.handleRoundSignatureResponse(&msg.RoundSignatureResponse)
}
}
}