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octoro.go
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octoro.go
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package main
import (
"container/list"
"errors"
"sync"
)
type NetworkInfo[N any] struct {
// Add necessary fields
}
type EpochState[C any, N any] struct {
// Add necessary fields
}
type Params struct {
maxFutureEpochs uint64
subsetHandlingStrategy string
encryptionSchedule EncryptionSchedule
}
type EncryptionSchedule int
const (
Always EncryptionSchedule = iota
Never
EveryNthEpoch
TickTock
)
type HoneyBadger[C any, N any] struct {
netinfo *NetworkInfo[N]
sessionID uint64
epoch uint64
hasInput bool
epochs map[uint64]*EpochState[C, N]
params Params
}
type Step[C any, N any] struct {
output []Batch[C, N]
faultLog []Fault
}
type Batch[C any, N any] struct {
// Add necessary fields
}
type Message[N any] struct {
epoch uint64
content string
}
type Fault struct {
// Add necessary fields
}
type Result[T any] struct {
// Add necessary fields
}
func NewHoneyBadger[C any, N any](netinfo *NetworkInfo[N], sessionID uint64, params Params) *HoneyBadger[C, N] {
return &HoneyBadger[C, N]{
netinfo: netinfo,
sessionID: sessionID,
epoch: 0,
hasInput: false,
epochs: make(map[uint64]*EpochState[C, N]),
params: params,
}
}
func (hb *HoneyBadger[C, N]) HandleInput(input C, rng *rand.Rand) (Step[C, N], error) {
return hb.propose(&input, rng)
}
func (hb *HoneyBadger[C, N]) HandleMessage(senderID N, message Message[N], rng *rand.Rand) (Step[C, N], error) {
return hb.handleMessage(senderID, message)
}
func (hb *HoneyBadger[C, N]) Terminated() bool {
return false
}
func (hb *HoneyBadger[C, N]) OurID() N {
return hb.netinfo.ourID()
}
func (hb *HoneyBadger[C, N]) propose(proposal *C, rng *rand.Rand) (Step[C, N], error) {
if !hb.netinfo.isValidator() {
return Step[C, N]{}, nil
}
hb.hasInput = true
step, err := hb.epochStateMut(hb.epoch).propose(proposal, rng)
if err != nil {
return Step[C, N]{}, err
}
return step.join(hb.tryOutputBatches())
}
func (hb *HoneyBadger[C, N]) handleMessage(senderID N, message Message[N]) (Step[C, N], error) {
if !hb.netinfo.isNodeValidator(senderID) {
return Step[C, N]{}, errors.New("unknown sender")
}
if message.epoch > hb.epoch+hb.params.maxFutureEpochs {
return Step[C, N]{}, errors.New("unexpected HB message epoch")
} else if message.epoch < hb.epoch {
return Step[C, N]{}, nil
} else {
step, err := hb.epochStateMut(message.epoch).handleMessageContent(senderID, message.content)
if err != nil {
return Step[C, N]{}, err
}
return step.join(hb.tryOutputBatches())
}
}
func (hb *HoneyBadger[C, N]) HasInput() bool {
return !hb.netinfo.isValidator() || hb.hasInput
}
func (hb *HoneyBadger[C, N]) GetEncryptionSchedule() EncryptionSchedule {
return hb.params.encryptionSchedule
}
func (hb *HoneyBadger[C, N]) NextEpoch() uint64 {
return hb.epoch
}
func (hb *HoneyBadger[C, N]) Netinfo() *NetworkInfo[N] {
return hb.netinfo
}
func (hb *HoneyBadger[C, N]) SkipToEpoch(epoch uint64) {
for hb.epoch < epoch {
hb.updateEpoch()
}
}
func (hb *HoneyBadger[C, N]) ReceivedProposals() int {
if epochState, ok := hb.epochs[hb.epoch]; ok {
return epochState.receivedProposals()
}
return 0
}
func (hb *HoneyBadger[C, N]) updateEpoch() {
delete(hb.epochs, hb.epoch)
hb.epoch++
hb.hasInput = false
}
func (hb *HoneyBadger[C, N]) tryOutputBatches() (Step[C, N], error) {
var step Step[C, N]
for {
if batch, faultLog := hb.epochs[hb.epoch].tryOutputBatch(); batch != nil {
step.output = append(step.output, *batch)
step.faultLog = append(step.faultLog, faultLog...)
hb.updateEpoch()
} else {
break
}
}
return step, nil
}
func (hb *HoneyBadger[C, N]) epochStateMut(epoch uint64) (*EpochState[C, N], error) {
if epochState, ok := hb.epochs[epoch]; ok {
return epochState, nil
}
newEpochState, err := NewEpochState(hb.netinfo, hb.sessionID, epoch, hb.params.subsetHandlingStrategy, hb.params.encryptionSchedule.UseOnEpoch(epoch))
if err != nil {
return nil, err
}
hb.epochs[epoch] = newEpochState
return newEpochState, nil
}
func (es EncryptionSchedule) UseOnEpoch(epoch uint64) bool {
switch es {
case Always:
return true
case Never:
return false
case EveryNthEpoch:
return (epoch % uint64(es)) == 0
case TickTock:
return (epoch % uint64(es)) <= uint64(es)
default:
return false
}
}