From d240e0cdec95681cf595609809dea4224dc479df Mon Sep 17 00:00:00 2001
From: Jimmy Hu <jimmy.hu@dexon.org>
Date: Mon, 22 Oct 2018 21:05:28 +0800
Subject: core: Handling self proposed DKG private share (#236)

---
 core/consensus.go      | 33 ++++++++++++++++++++++-----------
 core/crypto/dkg/dkg.go | 10 +++++-----
 core/types/dkg.go      | 18 +++++++-----------
 3 files changed, 34 insertions(+), 27 deletions(-)

(limited to 'core')

diff --git a/core/consensus.go b/core/consensus.go
index 478aedb..7154b1b 100644
--- a/core/consensus.go
+++ b/core/consensus.go
@@ -130,6 +130,7 @@ type consensusDKGReceiver struct {
 	gov          Governance
 	authModule   *Authenticator
 	nodeSetCache *NodeSetCache
+	cfgModule    *configurationChain
 	network      Network
 	logger       common.Logger
 }
@@ -170,9 +171,17 @@ func (recv *consensusDKGReceiver) ProposeDKGPrivateShare(
 			"receiver", prv.ReceiverID.String()[:6])
 		return
 	}
-	recv.logger.Debug("Calling Network.SendDKGPrivateShare",
-		"receiver", hex.EncodeToString(receiverPubKey.Bytes()))
-	recv.network.SendDKGPrivateShare(receiverPubKey, prv)
+	if prv.ReceiverID == recv.ID {
+		go func() {
+			if err := recv.cfgModule.processPrivateShare(prv); err != nil {
+				recv.logger.Error("Failed to process self private share", "prvShare", prv)
+			}
+		}()
+	} else {
+		recv.logger.Debug("Calling Network.SendDKGPrivateShare",
+			"receiver", hex.EncodeToString(receiverPubKey.Bytes()))
+		recv.network.SendDKGPrivateShare(receiverPubKey, prv)
+	}
 }
 
 // ProposeDKGAntiNackComplaint propose a DKGPrivateShare as an anti complaint.
@@ -273,18 +282,20 @@ func NewConsensus(
 		dMoment, config, authModule, nbModule, nbModule, db, logger)
 	// Init configuration chain.
 	ID := types.NewNodeID(prv.PublicKey())
+	recv := &consensusDKGReceiver{
+		ID:           ID,
+		gov:          gov,
+		authModule:   authModule,
+		nodeSetCache: nodeSetCache,
+		network:      network,
+		logger:       logger,
+	}
 	cfgModule := newConfigurationChain(
 		ID,
-		&consensusDKGReceiver{
-			ID:           ID,
-			gov:          gov,
-			authModule:   authModule,
-			nodeSetCache: nodeSetCache,
-			network:      network,
-			logger:       logger,
-		},
+		recv,
 		gov,
 		logger)
+	recv.cfgModule = cfgModule
 	// Construct Consensus instance.
 	con := &Consensus{
 		ID:            ID,
diff --git a/core/crypto/dkg/dkg.go b/core/crypto/dkg/dkg.go
index 8ca511d..066b070 100644
--- a/core/crypto/dkg/dkg.go
+++ b/core/crypto/dkg/dkg.go
@@ -388,15 +388,15 @@ func (pubs *PublicKeyShares) RecoverPublicKey(qualifyIDs IDs) (
 		return nil, ErrNoIDToRecover
 	}
 	for i, ID := range qualifyIDs {
-		idx, exist := pubs.shareIndex[ID]
-		if !exist {
-			return nil, ErrShareNotFound
+		pk, err := pubs.Share(ID)
+		if err != nil {
+			return nil, err
 		}
 		if i == 0 {
-			pub.publicKey = pubs.shares[idx].publicKey
+			pub.publicKey = pk.publicKey
 			continue
 		}
-		pub.publicKey.Add(&pubs.shares[idx].publicKey)
+		pub.publicKey.Add(&pk.publicKey)
 	}
 	return &pub, nil
 }
diff --git a/core/types/dkg.go b/core/types/dkg.go
index c0a42ee..3bdb414 100644
--- a/core/types/dkg.go
+++ b/core/types/dkg.go
@@ -38,15 +38,6 @@ type DKGPrivateShare struct {
 	Signature    crypto.Signature `json:"signature"`
 }
 
-func (p *DKGPrivateShare) String() string {
-	return fmt.Sprintf("prvShare(%d:%s->%s:%s:%s)",
-		p.Round,
-		p.ProposerID.String()[:6],
-		p.ReceiverID.String()[:6],
-		p.PrivateShare.String(),
-		p.Signature.String()[:6])
-}
-
 // DKGMasterPublicKey decrtibe a master public key in DKG protocol.
 type DKGMasterPublicKey struct {
 	ProposerID      NodeID              `json:"proposer_id"`
@@ -126,8 +117,13 @@ type DKGComplaint struct {
 }
 
 func (c *DKGComplaint) String() string {
-	return fmt.Sprintf("DKGComplaint[%s:%d]%s",
-		c.ProposerID.String()[:6], c.Round, &c.PrivateShare)
+	if c.IsNack() {
+		return fmt.Sprintf("DKGNackComplaint[%s:%d]%s",
+			c.ProposerID.String()[:6], c.Round,
+			c.PrivateShare.ProposerID.String()[:6])
+	}
+	return fmt.Sprintf("DKGComplaint[%s:%d]%v",
+		c.ProposerID.String()[:6], c.Round, c.PrivateShare)
 }
 
 // DKGPartialSignature describe a partial signature in DKG protocol.
-- 
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