// propagateConfig handles propagation of all configuration-proposals in the identity-service.
func (s *Service) propagateConfigHandler(msg network.Body) {
log.Lvlf4("Got msg %+v %v", msg, reflect.TypeOf(msg).String())
id := ID(nil)
switch msg.(type) {
case *ProposeSend:
id = msg.(*ProposeSend).ID
case *ProposeVote:
id = msg.(*ProposeVote).ID
default:
log.Errorf("Got an unidentified propagation-request: %v", msg)
return
}
if id != nil {
sid := s.getIdentityStorage(id)
if sid == nil {
log.Error("Didn't find entity in", s)
return
}
sid.Lock()
defer sid.Unlock()
switch msg.(type) {
case *ProposeSend:
p := msg.(*ProposeSend)
sid.Proposed = p.Config
sid.Votes = make(map[string]*crypto.SchnorrSig)
case *ProposeVote:
v := msg.(*ProposeVote)
sid.Votes[v.Signer] = v.Signature
}
}
}
// handleCommitChallenge will verify the signature + check if no more than 1/3
// of participants refused to sign.
func (bz *ByzCoin) handleChallengeCommit(ch *ChallengeCommit) error {
// marshal the block
marshalled, err := json.Marshal(bz.tempBlock)
if err != nil {
return err
}
ch.Challenge = bz.commit.Challenge(ch.Challenge)
// verify if the signature is correct
if err := cosi.VerifyCosiSignatureWithException(bz.suite, bz.aggregatedPublic, marshalled, ch.Signature, ch.Exceptions); err != nil {
log.Error(bz.Name(), "Verification of the signature failed:", err)
bz.signRefusal = true
}
// Verify if we have no more than 1/3 failed nodes
if len(ch.Exceptions) > int(bz.threshold) {
log.Errorf("More than 1/3 (%d/%d) refused to sign ! ABORT", len(ch.Exceptions), len(bz.Roster().List))
bz.signRefusal = true
}
// store the exceptions for later usage
bz.tempExceptions = ch.Exceptions
log.Lvl3("ByzCoin handle Challenge COMMIT")
if bz.IsLeaf() {
return bz.startResponseCommit()
}
// send it down
for _, tn := range bz.Children() {
err = bz.SendTo(tn, ch)
}
return nil
}
