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// Copyright 2018 The dexon-consensus-core Authors
// This file is part of the dexon-consensus-core library.
//
// The dexon-consensus-core library is free software: you can redistribute it
// and/or modify it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation, either version 3 of the License,
// or (at your option) any later version.
//
// The dexon-consensus-core library is distributed in the hope that it will be
// useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
// General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the dexon-consensus-core library. If not, see
// <http://www.gnu.org/licenses/>.
package types
import (
"fmt"
"github.com/dexon-foundation/dexon-consensus-core/core/crypto"
"github.com/dexon-foundation/dexon-consensus-core/core/crypto/dkg"
)
// DKGPrivateShare describe a secret share in DKG protocol.
type DKGPrivateShare struct {
ProposerID NodeID `json:"proposer_id"`
ReceiverID NodeID `json:"receiver_id"`
Round uint64 `json:"round"`
PrivateShare dkg.PrivateKey `json:"private_share"`
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"`
Round uint64 `json:"round"`
DKGID dkg.ID `json:"dkg_id"`
PublicKeyShares dkg.PublicKeyShares `json:"public_key_shares"`
Signature crypto.Signature `json:"signature"`
}
// NewDKGMasterPublicKey returns a new DKGMasterPublicKey instance.
func NewDKGMasterPublicKey() *DKGMasterPublicKey {
return &DKGMasterPublicKey{
PublicKeyShares: *dkg.NewEmptyPublicKeyShares(),
}
}
// DKGComplaint describe a complaint in DKG protocol.
type DKGComplaint struct {
ProposerID NodeID `json:"proposer_id"`
Round uint64 `json:"round"`
PrivateShare DKGPrivateShare `json:"private_share"`
Signature crypto.Signature `json:"signature"`
}
// DKGPartialSignatureType specifies ths threshold signature type.
type DKGPartialSignatureType uint32
// TSig enums.
const (
TSigConfigurationBlock DKGPartialSignatureType = iota
TSigNotaryAck
TSigCRS
)
// DKGPartialSignature describe a partial signature in DKG protocol.
type DKGPartialSignature struct {
ProposerID NodeID `json:"proposerID"`
Round uint64 `json:"round"`
Type DKGPartialSignatureType `json:"type"`
PartialSignature dkg.PartialSignature `json:"partial_signature"`
Signature crypto.Signature `json:"signature"`
}
// IsNack returns true if it's a nack complaint in DKG protocol.
func (c *DKGComplaint) IsNack() bool {
return len(c.PrivateShare.Signature.Signature) == 0
}
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