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malfeasance.go
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malfeasance.go
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package types
import (
"encoding/hex"
"errors"
"fmt"
"strings"
"time"
"github.com/spacemeshos/go-scale"
"github.com/spacemeshos/go-spacemesh/codec"
"github.com/spacemeshos/go-spacemesh/log"
)
//go:generate scalegen -types MalfeasanceProof,MalfeasanceGossip,AtxProof,BallotProof,HareProof,AtxProofMsg,BallotProofMsg,HareProofMsg,HareMetadata
const (
MultipleATXs byte = iota + 1
MultipleBallots
HareEquivocation
)
type MalfeasanceProof struct {
// for network upgrade
Layer LayerID
Proof Proof
received time.Time
}
func (mp *MalfeasanceProof) Received() time.Time {
return mp.received
}
func (mp *MalfeasanceProof) SetReceived(received time.Time) {
mp.received = received
}
func (mp *MalfeasanceProof) MarshalLogObject(encoder log.ObjectEncoder) error {
encoder.AddUint32("generated_layer", mp.Layer.Uint32())
switch mp.Proof.Type {
case MultipleATXs:
encoder.AddString("type", "multiple atxs")
p, ok := mp.Proof.Data.(*AtxProof)
if !ok {
encoder.AddString("msgs", "n/a")
} else {
encoder.AddObject("msgs", p)
}
case MultipleBallots:
encoder.AddString("type", "multiple ballots")
p, ok := mp.Proof.Data.(*BallotProof)
if !ok {
encoder.AddString("msgs", "n/a")
} else {
encoder.AddObject("msgs", p)
}
case HareEquivocation:
encoder.AddString("type", "hare equivocation")
p, ok := mp.Proof.Data.(*HareProof)
if !ok {
encoder.AddString("msgs", "n/a")
} else {
encoder.AddObject("msgs", p)
}
default:
encoder.AddString("type", "unknown")
}
encoder.AddTime("received", mp.received)
return nil
}
type Proof struct {
// MultipleATXs | MultipleBallots | HareEquivocation
Type uint8
// AtxProof | BallotProof | HareProof
Data scale.Type
}
func (e *Proof) EncodeScale(enc *scale.Encoder) (int, error) {
var total int
{
// not compact, as scale spec uses "full" uint8 for enums
n, err := scale.EncodeByte(enc, e.Type)
if err != nil {
return total, err
}
total += n
}
{
n, err := e.Data.EncodeScale(enc)
if err != nil {
return total, err
}
total += n
}
return total, nil
}
func (e *Proof) DecodeScale(dec *scale.Decoder) (int, error) {
var total int
{
typ, n, err := scale.DecodeByte(dec)
if err != nil {
return total, err
}
e.Type = typ
total += n
}
switch e.Type {
case MultipleATXs:
var proof AtxProof
n, err := proof.DecodeScale(dec)
if err != nil {
return total, err
}
e.Data = &proof
total += n
case MultipleBallots:
var proof BallotProof
n, err := proof.DecodeScale(dec)
if err != nil {
return total, err
}
e.Data = &proof
total += n
case HareEquivocation:
var proof HareProof
n, err := proof.DecodeScale(dec)
if err != nil {
return total, err
}
e.Data = &proof
total += n
default:
return total, errors.New("unknown malfeasance type")
}
return total, nil
}
type MalfeasanceGossip struct {
MalfeasanceProof
Eligibility *HareEligibilityGossip // optional, only useful in live hare rounds
}
func (mg *MalfeasanceGossip) MarshalLogObject(encoder log.ObjectEncoder) error {
encoder.AddObject("proof", &mg.MalfeasanceProof)
if mg.Eligibility != nil {
encoder.AddObject("hare eligibility", mg.Eligibility)
}
return nil
}
type AtxProof struct {
Messages [2]AtxProofMsg
}
func (ap *AtxProof) MarshalLogObject(encoder log.ObjectEncoder) error {
encoder.AddObject("first", &ap.Messages[0].InnerMsg)
encoder.AddObject("second", &ap.Messages[1].InnerMsg)
return nil
}
type BallotProof struct {
Messages [2]BallotProofMsg
}
func (bp *BallotProof) MarshalLogObject(encoder log.ObjectEncoder) error {
encoder.AddObject("first", &bp.Messages[0].InnerMsg)
encoder.AddObject("second", &bp.Messages[1].InnerMsg)
return nil
}
type HareProof struct {
Messages [2]HareProofMsg
}
func (hp *HareProof) MarshalLogObject(encoder log.ObjectEncoder) error {
encoder.AddObject("first", &hp.Messages[0].InnerMsg)
encoder.AddObject("second", &hp.Messages[1].InnerMsg)
return nil
}
func (hp *HareProof) ToMalfeasenceProof() *MalfeasanceProof {
return &MalfeasanceProof{
Layer: hp.Messages[0].InnerMsg.Layer,
Proof: Proof{
Type: HareEquivocation,
Data: hp,
},
}
}
type AtxProofMsg struct {
InnerMsg ATXMetadata
SmesherID NodeID
Signature EdSignature
}
// SignedBytes returns the actual data being signed in a AtxProofMsg.
func (m *AtxProofMsg) SignedBytes() []byte {
data, err := codec.Encode(&m.InnerMsg)
if err != nil {
log.With().Fatal("failed to serialize AtxProofMsg", log.Err(err))
}
return data
}
type BallotProofMsg struct {
InnerMsg BallotMetadata
SmesherID NodeID
Signature EdSignature
}
// SignedBytes returns the actual data being signed in a BallotProofMsg.
func (m *BallotProofMsg) SignedBytes() []byte {
data, err := codec.Encode(&m.InnerMsg)
if err != nil {
log.With().Fatal("failed to serialize MultiBlockProposalsMsg", log.Err(err))
}
return data
}
type HareMetadata struct {
Layer LayerID
// the round counter (K)
Round uint32
// hash of hare.Message.InnerMessage
MsgHash Hash32
}
func (hm *HareMetadata) MarshalLogObject(encoder log.ObjectEncoder) error {
encoder.AddUint32("layer", hm.Layer.Uint32())
encoder.AddUint32("round", hm.Round)
encoder.AddString("msgHash", hm.MsgHash.String())
return nil
}
// Equivocation detects if two messages form an equivocation, based on their HareMetadata.
// It returns true if the two messages are from the same layer and round, but have different hashes.
func (hm *HareMetadata) Equivocation(other *HareMetadata) bool {
return hm.Layer == other.Layer && hm.Round == other.Round && hm.MsgHash != other.MsgHash
}
func (hm HareMetadata) ToBytes() []byte {
buf, err := codec.Encode(&hm)
if err != nil {
panic(err.Error())
}
return buf
}
type HareProofMsg struct {
InnerMsg HareMetadata
SmesherID NodeID
Signature EdSignature
}
// SignedBytes returns the actual data being signed in a HareProofMsg.
func (m *HareProofMsg) SignedBytes() []byte {
return m.InnerMsg.ToBytes()
}
func MalfeasanceInfo(smesher NodeID, mp *MalfeasanceProof) string {
var b strings.Builder
b.WriteString(fmt.Sprintf("generate layer: %v\n", mp.Layer))
b.WriteString(fmt.Sprintf("smesher id: %s\n", smesher.String()))
switch mp.Proof.Type {
case MultipleATXs:
p, ok := mp.Proof.Data.(*AtxProof)
if ok {
b.WriteString(fmt.Sprintf("cause: smesher published multiple ATXs in epoch %d\n", p.Messages[0].InnerMsg.PublishEpoch))
b.WriteString(fmt.Sprintf("1st message hash: %s\n", hex.EncodeToString(p.Messages[0].InnerMsg.MsgHash.Bytes())))
b.WriteString(fmt.Sprintf("1st message signature: %s\n", hex.EncodeToString(p.Messages[0].Signature.Bytes())))
b.WriteString(fmt.Sprintf("2nd message hash: %s\n", hex.EncodeToString(p.Messages[1].InnerMsg.MsgHash.Bytes())))
b.WriteString(fmt.Sprintf("2nd message signature: %s\n", hex.EncodeToString(p.Messages[1].Signature.Bytes())))
}
case MultipleBallots:
p, ok := mp.Proof.Data.(*BallotProof)
if ok {
b.WriteString(fmt.Sprintf("cause: smesher published multiple ballots in layer %d\n", p.Messages[0].InnerMsg.Layer))
b.WriteString(fmt.Sprintf("1st message hash: %s\n", hex.EncodeToString(p.Messages[0].InnerMsg.MsgHash.Bytes())))
b.WriteString(fmt.Sprintf("1st message signature: %s\n", hex.EncodeToString(p.Messages[0].Signature.Bytes())))
b.WriteString(fmt.Sprintf("2nd message hash: %s\n", hex.EncodeToString(p.Messages[1].InnerMsg.MsgHash.Bytes())))
b.WriteString(fmt.Sprintf("2nd message signature: %s\n", hex.EncodeToString(p.Messages[1].Signature.Bytes())))
}
case HareEquivocation:
p, ok := mp.Proof.Data.(*HareProof)
if ok {
b.WriteString(fmt.Sprintf("cause: smesher published multiple hare messages in layer %d round %d\n",
p.Messages[0].InnerMsg.Layer, p.Messages[0].InnerMsg.Round))
b.WriteString(fmt.Sprintf("1st message hash: %s\n", hex.EncodeToString(p.Messages[0].InnerMsg.MsgHash.Bytes())))
b.WriteString(fmt.Sprintf("1st message signature: %s\n", hex.EncodeToString(p.Messages[0].Signature.Bytes())))
b.WriteString(fmt.Sprintf("2nd message hash: %s\n", hex.EncodeToString(p.Messages[1].InnerMsg.MsgHash.Bytes())))
b.WriteString(fmt.Sprintf("2nd message signature: %s\n", hex.EncodeToString(p.Messages[1].Signature.Bytes())))
}
}
return b.String()
}