mirror of
https://source.quilibrium.com/quilibrium/ceremonyclient.git
synced 2024-12-28 01:25:18 +00:00
872 lines
19 KiB
Go
872 lines
19 KiB
Go
package time
|
||
|
||
import (
|
||
"bytes"
|
||
"encoding/hex"
|
||
"math/big"
|
||
"sort"
|
||
"sync"
|
||
|
||
lru "github.com/hashicorp/golang-lru/v2"
|
||
"github.com/pkg/errors"
|
||
"go.uber.org/zap"
|
||
"source.quilibrium.com/quilibrium/monorepo/node/config"
|
||
"source.quilibrium.com/quilibrium/monorepo/node/crypto"
|
||
"source.quilibrium.com/quilibrium/monorepo/node/protobufs"
|
||
"source.quilibrium.com/quilibrium/monorepo/node/store"
|
||
"source.quilibrium.com/quilibrium/monorepo/node/tries"
|
||
)
|
||
|
||
var allBitmaskFilter = []byte{
|
||
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
|
||
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
|
||
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
|
||
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
|
||
}
|
||
|
||
var unknownDistance = new(big.Int).SetBytes([]byte{
|
||
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
|
||
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
|
||
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
|
||
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
|
||
})
|
||
|
||
type pendingFrame struct {
|
||
selector *big.Int
|
||
parentSelector *big.Int
|
||
frameNumber uint64
|
||
}
|
||
|
||
type DataTimeReel struct {
|
||
rwMutex sync.RWMutex
|
||
running bool
|
||
|
||
filter []byte
|
||
engineConfig *config.EngineConfig
|
||
logger *zap.Logger
|
||
clockStore store.ClockStore
|
||
frameProver crypto.FrameProver
|
||
parentTimeReel TimeReel
|
||
|
||
origin []byte
|
||
initialInclusionProof *crypto.InclusionAggregateProof
|
||
initialProverKeys [][]byte
|
||
head *protobufs.ClockFrame
|
||
totalDistance *big.Int
|
||
headDistance *big.Int
|
||
lruFrames *lru.Cache[string, string]
|
||
proverTrie *tries.RollingFrecencyCritbitTrie
|
||
pending map[uint64][]*pendingFrame
|
||
incompleteForks map[uint64][]*pendingFrame
|
||
frames chan *pendingFrame
|
||
newFrameCh chan *protobufs.ClockFrame
|
||
badFrameCh chan *protobufs.ClockFrame
|
||
done chan bool
|
||
}
|
||
|
||
func NewDataTimeReel(
|
||
filter []byte,
|
||
logger *zap.Logger,
|
||
clockStore store.ClockStore,
|
||
engineConfig *config.EngineConfig,
|
||
frameProver crypto.FrameProver,
|
||
origin []byte,
|
||
initialInclusionProof *crypto.InclusionAggregateProof,
|
||
initialProverKeys [][]byte,
|
||
) *DataTimeReel {
|
||
if filter == nil {
|
||
panic("filter is nil")
|
||
}
|
||
|
||
if logger == nil {
|
||
panic("logger is nil")
|
||
}
|
||
|
||
if clockStore == nil {
|
||
panic("clock store is nil")
|
||
}
|
||
|
||
if engineConfig == nil {
|
||
panic("engine config is nil")
|
||
}
|
||
|
||
if frameProver == nil {
|
||
panic("frame prover is nil")
|
||
}
|
||
|
||
cache, err := lru.New[string, string](10000)
|
||
if err != nil {
|
||
panic(err)
|
||
}
|
||
|
||
return &DataTimeReel{
|
||
running: false,
|
||
logger: logger,
|
||
filter: filter,
|
||
engineConfig: engineConfig,
|
||
clockStore: clockStore,
|
||
frameProver: frameProver,
|
||
origin: origin,
|
||
initialInclusionProof: initialInclusionProof,
|
||
initialProverKeys: initialProverKeys,
|
||
lruFrames: cache,
|
||
pending: make(map[uint64][]*pendingFrame),
|
||
incompleteForks: make(map[uint64][]*pendingFrame),
|
||
frames: make(chan *pendingFrame),
|
||
newFrameCh: make(chan *protobufs.ClockFrame),
|
||
badFrameCh: make(chan *protobufs.ClockFrame),
|
||
done: make(chan bool),
|
||
}
|
||
}
|
||
|
||
func (d *DataTimeReel) Start() error {
|
||
trie := &tries.RollingFrecencyCritbitTrie{}
|
||
frame, err := d.clockStore.GetLatestDataClockFrame(d.filter, trie)
|
||
if err != nil && !errors.Is(err, store.ErrNotFound) {
|
||
panic(err)
|
||
}
|
||
|
||
if frame == nil {
|
||
d.head, d.proverTrie = d.createGenesisFrame()
|
||
d.totalDistance = big.NewInt(0)
|
||
d.headDistance = big.NewInt(0)
|
||
} else {
|
||
d.head = frame
|
||
if err != nil {
|
||
panic(err)
|
||
}
|
||
d.totalDistance = big.NewInt(0)
|
||
d.proverTrie = trie
|
||
d.headDistance, err = d.GetDistance(frame)
|
||
}
|
||
|
||
go d.runLoop()
|
||
|
||
return nil
|
||
}
|
||
|
||
func (d *DataTimeReel) Head() (*protobufs.ClockFrame, error) {
|
||
return d.head, nil
|
||
}
|
||
|
||
// Insert enqueues a structurally valid frame into the time reel. If the frame
|
||
// is the next one in sequence, it advances the reel head forward and emits a
|
||
// new frame on the new frame channel.
|
||
func (d *DataTimeReel) Insert(frame *protobufs.ClockFrame, isSync bool) error {
|
||
if !d.running {
|
||
return nil
|
||
}
|
||
|
||
d.logger.Debug(
|
||
"insert frame",
|
||
zap.Uint64("frame_number", frame.FrameNumber),
|
||
zap.String("output_tag", hex.EncodeToString(frame.Output[:64])),
|
||
)
|
||
|
||
if d.lruFrames.Contains(string(frame.Output[:64])) {
|
||
return nil
|
||
}
|
||
|
||
d.lruFrames.Add(string(frame.Output[:64]), string(frame.ParentSelector))
|
||
|
||
parent := new(big.Int).SetBytes(frame.ParentSelector)
|
||
selector, err := frame.GetSelector()
|
||
if err != nil {
|
||
panic(err)
|
||
}
|
||
|
||
distance, _ := d.GetDistance(frame)
|
||
|
||
d.storePending(selector, parent, distance, frame)
|
||
|
||
if !isSync {
|
||
go func() {
|
||
d.frames <- &pendingFrame{
|
||
selector: selector,
|
||
parentSelector: parent,
|
||
frameNumber: frame.FrameNumber,
|
||
}
|
||
}()
|
||
}
|
||
|
||
return nil
|
||
}
|
||
|
||
func (d *DataTimeReel) GetFrameProverTrie() *tries.RollingFrecencyCritbitTrie {
|
||
return d.proverTrie
|
||
}
|
||
|
||
func (d *DataTimeReel) NewFrameCh() <-chan *protobufs.ClockFrame {
|
||
return d.newFrameCh
|
||
}
|
||
|
||
func (d *DataTimeReel) BadFrameCh() <-chan *protobufs.ClockFrame {
|
||
return d.badFrameCh
|
||
}
|
||
|
||
func (d *DataTimeReel) Stop() {
|
||
d.done <- true
|
||
}
|
||
|
||
func (d *DataTimeReel) createGenesisFrame() (
|
||
*protobufs.ClockFrame,
|
||
*tries.RollingFrecencyCritbitTrie,
|
||
) {
|
||
if d.origin == nil {
|
||
panic("origin is nil")
|
||
}
|
||
|
||
if d.initialInclusionProof == nil {
|
||
panic("initial inclusion proof is nil")
|
||
}
|
||
|
||
if d.initialProverKeys == nil {
|
||
panic("initial prover keys is nil")
|
||
}
|
||
|
||
difficulty := d.engineConfig.Difficulty
|
||
if difficulty == 0 || difficulty == 10000 {
|
||
difficulty = 100000
|
||
}
|
||
|
||
frame, trie, err := d.frameProver.CreateDataGenesisFrame(
|
||
d.filter,
|
||
d.origin,
|
||
difficulty,
|
||
d.initialInclusionProof,
|
||
d.initialProverKeys,
|
||
true,
|
||
)
|
||
if err != nil {
|
||
panic(err)
|
||
}
|
||
|
||
selector, err := frame.GetSelector()
|
||
if err != nil {
|
||
panic(err)
|
||
}
|
||
|
||
txn, err := d.clockStore.NewTransaction()
|
||
if err != nil {
|
||
panic(err)
|
||
}
|
||
|
||
err = d.clockStore.StageDataClockFrame(
|
||
selector.FillBytes(make([]byte, 32)),
|
||
frame,
|
||
txn,
|
||
)
|
||
if err != nil {
|
||
txn.Abort()
|
||
panic(err)
|
||
}
|
||
|
||
if err := d.clockStore.CommitDataClockFrame(
|
||
d.filter,
|
||
0,
|
||
selector.FillBytes(make([]byte, 32)),
|
||
trie,
|
||
txn,
|
||
false,
|
||
); err != nil {
|
||
panic(err)
|
||
}
|
||
|
||
if err := txn.Commit(); err != nil {
|
||
panic(err)
|
||
}
|
||
|
||
return frame, trie
|
||
}
|
||
|
||
// Main data consensus loop
|
||
func (d *DataTimeReel) runLoop() {
|
||
d.running = true
|
||
for {
|
||
select {
|
||
case frame := <-d.frames:
|
||
// Most common scenario: in order – new frame is higher number
|
||
if d.head.FrameNumber < frame.frameNumber {
|
||
d.logger.Debug(
|
||
"frame is higher",
|
||
zap.Uint64("head_frame_number", d.head.FrameNumber),
|
||
zap.Uint64("frame_number", frame.frameNumber),
|
||
)
|
||
|
||
// tag: equinox – master filter changes
|
||
_, err := d.clockStore.GetMasterClockFrame(
|
||
allBitmaskFilter,
|
||
frame.frameNumber)
|
||
if err != nil {
|
||
d.logger.Debug("no master, add pending")
|
||
|
||
// If the frame arrived ahead of a master, e.g. the master data is not
|
||
// synced, we'll go ahead and mark it as pending and process it when
|
||
// we can, but if we had a general fault, panic:
|
||
if !errors.Is(err, store.ErrNotFound) {
|
||
panic(err)
|
||
}
|
||
continue
|
||
}
|
||
|
||
rawFrame, err := d.clockStore.GetStagedDataClockFrame(
|
||
d.filter,
|
||
frame.frameNumber,
|
||
frame.selector.FillBytes(make([]byte, 32)),
|
||
false,
|
||
)
|
||
if err != nil {
|
||
panic(err)
|
||
}
|
||
|
||
distance, err := d.GetDistance(rawFrame)
|
||
if err != nil {
|
||
panic(err)
|
||
}
|
||
|
||
// Otherwise set it as the next and process all pending
|
||
d.setHead(rawFrame, distance)
|
||
} else if d.head.FrameNumber == frame.frameNumber {
|
||
// frames are equivalent, no need to act
|
||
headSelector, err := d.head.GetSelector()
|
||
if err != nil {
|
||
panic(err)
|
||
}
|
||
|
||
if headSelector.Cmp(frame.selector) == 0 {
|
||
d.logger.Debug("equivalent frame")
|
||
continue
|
||
}
|
||
|
||
rawFrame, err := d.clockStore.GetStagedDataClockFrame(
|
||
d.filter,
|
||
frame.frameNumber,
|
||
frame.selector.FillBytes(make([]byte, 32)),
|
||
false,
|
||
)
|
||
if err != nil {
|
||
panic(err)
|
||
}
|
||
|
||
distance, err := d.GetDistance(rawFrame)
|
||
if err != nil {
|
||
panic(err)
|
||
}
|
||
|
||
// Optimization: if competing frames share a parent we can short-circuit
|
||
// fork choice
|
||
if new(big.Int).SetBytes(d.head.ParentSelector).Cmp(
|
||
frame.parentSelector,
|
||
) == 0 && distance.Cmp(d.headDistance) < 0 {
|
||
d.logger.Debug(
|
||
"frame shares parent, has shorter distance, short circuit",
|
||
)
|
||
d.setHead(rawFrame, distance)
|
||
continue
|
||
}
|
||
} else {
|
||
d.logger.Debug("frame is lower height")
|
||
}
|
||
case <-d.done:
|
||
return
|
||
}
|
||
}
|
||
}
|
||
|
||
func (d *DataTimeReel) addPending(
|
||
selector *big.Int,
|
||
parent *big.Int,
|
||
frameNumber uint64,
|
||
) {
|
||
d.logger.Debug(
|
||
"add pending",
|
||
zap.Uint64("head_frame_number", d.head.FrameNumber),
|
||
zap.Uint64("add_frame_number", frameNumber),
|
||
zap.String("selector", selector.Text(16)),
|
||
zap.String("parent", parent.Text(16)),
|
||
)
|
||
|
||
if d.head.FrameNumber <= frameNumber {
|
||
if _, ok := d.pending[frameNumber]; !ok {
|
||
d.pending[frameNumber] = []*pendingFrame{}
|
||
}
|
||
|
||
// avoid heavy thrashing
|
||
for _, frame := range d.pending[frameNumber] {
|
||
if frame.selector.Cmp(selector) == 0 {
|
||
d.logger.Debug("exists in pending already")
|
||
return
|
||
}
|
||
}
|
||
}
|
||
|
||
if d.head.FrameNumber <= frameNumber {
|
||
d.logger.Debug(
|
||
"accumulate in pending",
|
||
zap.Int("pending_neighbors", len(d.pending[frameNumber])),
|
||
)
|
||
|
||
d.pending[frameNumber] = append(
|
||
d.pending[frameNumber],
|
||
&pendingFrame{
|
||
selector: selector,
|
||
parentSelector: parent,
|
||
frameNumber: frameNumber,
|
||
},
|
||
)
|
||
}
|
||
}
|
||
|
||
func (d *DataTimeReel) storePending(
|
||
selector *big.Int,
|
||
parent *big.Int,
|
||
distance *big.Int,
|
||
frame *protobufs.ClockFrame,
|
||
) {
|
||
// avoid db thrashing
|
||
if existing, err := d.clockStore.GetStagedDataClockFrame(
|
||
frame.Filter,
|
||
frame.FrameNumber,
|
||
selector.FillBytes(make([]byte, 32)),
|
||
true,
|
||
); err != nil && existing == nil {
|
||
d.logger.Debug(
|
||
"not stored yet, save data candidate",
|
||
zap.Uint64("frame_number", frame.FrameNumber),
|
||
zap.String("selector", selector.Text(16)),
|
||
zap.String("parent", parent.Text(16)),
|
||
zap.String("distance", distance.Text(16)),
|
||
)
|
||
|
||
txn, err := d.clockStore.NewTransaction()
|
||
if err != nil {
|
||
panic(err)
|
||
}
|
||
err = d.clockStore.StageDataClockFrame(
|
||
selector.FillBytes(make([]byte, 32)),
|
||
frame,
|
||
txn,
|
||
)
|
||
if err != nil {
|
||
txn.Abort()
|
||
panic(err)
|
||
}
|
||
if err = txn.Commit(); err != nil {
|
||
panic(err)
|
||
}
|
||
}
|
||
}
|
||
|
||
func (d *DataTimeReel) processPending(
|
||
frame *protobufs.ClockFrame,
|
||
lastReceived *pendingFrame,
|
||
) {
|
||
d.logger.Debug(
|
||
"process pending",
|
||
zap.Int("pending_frame_numbers", len(d.pending)),
|
||
)
|
||
frameNumbers := []uint64{}
|
||
for f := range d.pending {
|
||
frameNumbers = append(frameNumbers, f)
|
||
d.logger.Debug(
|
||
"pending per frame number",
|
||
zap.Uint64("pending_frame_number", f),
|
||
zap.Int("pending_frames", len(d.pending[f])),
|
||
)
|
||
}
|
||
sort.Slice(frameNumbers, func(i, j int) bool {
|
||
return frameNumbers[i] > frameNumbers[j]
|
||
})
|
||
|
||
lastSelector := lastReceived.selector
|
||
|
||
for _, f := range frameNumbers {
|
||
if f < d.head.FrameNumber {
|
||
delete(d.pending, f)
|
||
}
|
||
|
||
nextPending := d.pending[f]
|
||
d.logger.Debug(
|
||
"checking frame set",
|
||
zap.Uint64("pending_frame_number", f),
|
||
zap.Uint64("frame_number", frame.FrameNumber),
|
||
)
|
||
if f < frame.FrameNumber {
|
||
d.logger.Debug(
|
||
"purging frame set",
|
||
zap.Uint64("pending_frame_number", f),
|
||
zap.Uint64("frame_number", frame.FrameNumber),
|
||
)
|
||
delete(d.pending, f)
|
||
continue
|
||
}
|
||
// Pull the next
|
||
for len(nextPending) != 0 {
|
||
d.logger.Debug("try process next")
|
||
next := nextPending[0]
|
||
d.pending[f] = d.pending[f][1:]
|
||
if f == lastReceived.frameNumber && next.selector.Cmp(lastSelector) == 0 {
|
||
d.pending[f] = append(d.pending[f], next)
|
||
if len(d.pending[f]) == 1 {
|
||
nextPending = nil
|
||
}
|
||
continue
|
||
}
|
||
|
||
go func() {
|
||
d.frames <- next
|
||
}()
|
||
return
|
||
}
|
||
}
|
||
}
|
||
|
||
func (d *DataTimeReel) setHead(frame *protobufs.ClockFrame, distance *big.Int) {
|
||
d.logger.Debug(
|
||
"set frame to head",
|
||
zap.Uint64("frame_number", frame.FrameNumber),
|
||
zap.String("output_tag", hex.EncodeToString(frame.Output[:64])),
|
||
zap.Uint64("head_number", d.head.FrameNumber),
|
||
zap.String("head_output_tag", hex.EncodeToString(d.head.Output[:64])),
|
||
)
|
||
txn, err := d.clockStore.NewTransaction()
|
||
if err != nil {
|
||
panic(err)
|
||
}
|
||
|
||
d.logger.Debug(
|
||
"save data",
|
||
zap.Uint64("frame_number", frame.FrameNumber),
|
||
zap.String("distance", distance.Text(16)),
|
||
)
|
||
|
||
selector, err := frame.GetSelector()
|
||
if err != nil {
|
||
panic(err)
|
||
}
|
||
|
||
if err := d.clockStore.CommitDataClockFrame(
|
||
d.filter,
|
||
frame.FrameNumber,
|
||
selector.FillBytes(make([]byte, 32)),
|
||
d.proverTrie,
|
||
txn,
|
||
false,
|
||
); err != nil {
|
||
panic(err)
|
||
}
|
||
|
||
if err = txn.Commit(); err != nil {
|
||
panic(err)
|
||
}
|
||
|
||
d.head = frame
|
||
|
||
d.headDistance = distance
|
||
go func() {
|
||
d.newFrameCh <- frame
|
||
}()
|
||
}
|
||
|
||
// tag: dusk – store the distance with the frame
|
||
func (d *DataTimeReel) getTotalDistance(frame *protobufs.ClockFrame) *big.Int {
|
||
selector, err := frame.GetSelector()
|
||
if err != nil {
|
||
panic(err)
|
||
}
|
||
|
||
total, err := d.clockStore.GetTotalDistance(
|
||
d.filter,
|
||
frame.FrameNumber,
|
||
selector.FillBytes(make([]byte, 32)),
|
||
)
|
||
if err == nil && total != nil {
|
||
return total
|
||
}
|
||
|
||
total, err = d.GetDistance(frame)
|
||
if err != nil {
|
||
panic(err)
|
||
}
|
||
|
||
for index := frame; err == nil &&
|
||
index.FrameNumber > 0; index, err = d.clockStore.GetStagedDataClockFrame(
|
||
d.filter,
|
||
index.FrameNumber-1,
|
||
index.ParentSelector,
|
||
true,
|
||
) {
|
||
distance, err := d.GetDistance(index)
|
||
if err != nil {
|
||
panic(err)
|
||
}
|
||
|
||
total.Add(total, distance)
|
||
}
|
||
|
||
d.clockStore.SetTotalDistance(
|
||
d.filter,
|
||
frame.FrameNumber,
|
||
selector.FillBytes(make([]byte, 32)),
|
||
total,
|
||
)
|
||
|
||
return total
|
||
}
|
||
|
||
func (d *DataTimeReel) GetDistance(frame *protobufs.ClockFrame) (
|
||
*big.Int,
|
||
error,
|
||
) {
|
||
// tag: equinox – master filter changes
|
||
master, err := d.clockStore.GetMasterClockFrame(
|
||
allBitmaskFilter,
|
||
frame.FrameNumber)
|
||
if err != nil {
|
||
return unknownDistance, errors.Wrap(err, "get distance")
|
||
}
|
||
|
||
masterSelector, err := master.GetSelector()
|
||
if err != nil {
|
||
return unknownDistance, errors.Wrap(err, "get distance")
|
||
}
|
||
|
||
discriminatorNode :=
|
||
d.proverTrie.FindNearest(masterSelector.FillBytes(make([]byte, 32)))
|
||
discriminator := discriminatorNode.External.Key
|
||
addr, err := frame.GetAddress()
|
||
if err != nil {
|
||
return unknownDistance, errors.Wrap(err, "get distance")
|
||
}
|
||
distance := new(big.Int).Sub(
|
||
new(big.Int).SetBytes(discriminator),
|
||
new(big.Int).SetBytes(addr),
|
||
)
|
||
distance.Abs(distance)
|
||
|
||
return distance, nil
|
||
}
|
||
|
||
func (d *DataTimeReel) forkChoice(
|
||
frame *protobufs.ClockFrame,
|
||
distance *big.Int,
|
||
) {
|
||
d.logger.Debug(
|
||
"fork choice",
|
||
zap.Uint64("frame_number", frame.FrameNumber),
|
||
zap.String("output_tag", hex.EncodeToString(frame.Output[:64])),
|
||
zap.Uint64("head_number", d.head.FrameNumber),
|
||
zap.String("head_output_tag", hex.EncodeToString(d.head.Output[:64])),
|
||
)
|
||
parentSelector, selector, err := frame.GetParentAndSelector()
|
||
if err != nil {
|
||
panic(err)
|
||
}
|
||
|
||
leftIndex := d.head
|
||
rightIndex := frame
|
||
leftTotal := new(big.Int).Set(d.headDistance)
|
||
overweight := big.NewInt(0)
|
||
rightTotal := new(big.Int).Set(distance)
|
||
left := d.head.ParentSelector
|
||
right := frame.ParentSelector
|
||
|
||
rightReplaySelectors := [][]byte{}
|
||
|
||
for rightIndex.FrameNumber > leftIndex.FrameNumber {
|
||
rightReplaySelectors = append(
|
||
append(
|
||
[][]byte{},
|
||
right,
|
||
),
|
||
rightReplaySelectors...,
|
||
)
|
||
|
||
rightIndex, err = d.clockStore.GetStagedDataClockFrame(
|
||
d.filter,
|
||
rightIndex.FrameNumber-1,
|
||
rightIndex.ParentSelector,
|
||
true,
|
||
)
|
||
if err != nil {
|
||
// If lineage cannot be verified, set it for later
|
||
if errors.Is(err, store.ErrNotFound) {
|
||
d.addPending(selector, parentSelector, frame.FrameNumber)
|
||
return
|
||
} else {
|
||
panic(err)
|
||
}
|
||
}
|
||
|
||
right = rightIndex.ParentSelector
|
||
|
||
rightIndexDistance, err := d.GetDistance(rightIndex)
|
||
if err != nil {
|
||
panic(err)
|
||
}
|
||
|
||
// We accumulate right on left when right is longer because we cannot know
|
||
// where the left will lead and don't want it to disadvantage our comparison
|
||
overweight.Add(overweight, rightIndexDistance)
|
||
rightTotal.Add(rightTotal, rightIndexDistance)
|
||
}
|
||
|
||
// Walk backwards through the parents, until we find a matching parent
|
||
// selector:
|
||
for !bytes.Equal(left, right) {
|
||
d.logger.Debug(
|
||
"scan backwards",
|
||
zap.String("left_parent", hex.EncodeToString(leftIndex.ParentSelector)),
|
||
zap.String("right_parent", hex.EncodeToString(rightIndex.ParentSelector)),
|
||
)
|
||
|
||
rightReplaySelectors = append(
|
||
append(
|
||
[][]byte{},
|
||
right,
|
||
),
|
||
rightReplaySelectors...,
|
||
)
|
||
leftIndex, err = d.clockStore.GetStagedDataClockFrame(
|
||
d.filter,
|
||
leftIndex.FrameNumber-1,
|
||
leftIndex.ParentSelector,
|
||
true,
|
||
)
|
||
if err != nil {
|
||
d.logger.Error(
|
||
"store corruption: a discontinuity has been found in your time reel",
|
||
zap.String(
|
||
"selector",
|
||
hex.EncodeToString(leftIndex.ParentSelector),
|
||
),
|
||
zap.Uint64("frame_number", leftIndex.FrameNumber-1),
|
||
)
|
||
panic(err)
|
||
}
|
||
|
||
rightIndex, err = d.clockStore.GetStagedDataClockFrame(
|
||
d.filter,
|
||
rightIndex.FrameNumber-1,
|
||
rightIndex.ParentSelector,
|
||
true,
|
||
)
|
||
if err != nil {
|
||
// If lineage cannot be verified, set it for later
|
||
if errors.Is(err, store.ErrNotFound) {
|
||
d.addPending(selector, parentSelector, frame.FrameNumber)
|
||
return
|
||
} else {
|
||
panic(err)
|
||
}
|
||
}
|
||
|
||
left = leftIndex.ParentSelector
|
||
right = rightIndex.ParentSelector
|
||
leftIndexDistance, err := d.GetDistance(leftIndex)
|
||
if err != nil {
|
||
panic(err)
|
||
}
|
||
|
||
rightIndexDistance, err := d.GetDistance(rightIndex)
|
||
if err != nil {
|
||
panic(err)
|
||
}
|
||
|
||
leftTotal.Add(leftTotal, leftIndexDistance)
|
||
rightTotal.Add(rightTotal, rightIndexDistance)
|
||
}
|
||
d.logger.Debug("found mutual root")
|
||
|
||
frameNumber := rightIndex.FrameNumber
|
||
|
||
overweight.Add(overweight, leftTotal)
|
||
|
||
// Choose new fork based on lightest distance sub-tree
|
||
if rightTotal.Cmp(overweight) > 0 {
|
||
d.logger.Debug("proposed fork has greater distance",
|
||
zap.String("right_total", rightTotal.Text(16)),
|
||
zap.String("left_total", overweight.Text(16)),
|
||
)
|
||
d.addPending(selector, parentSelector, frame.FrameNumber)
|
||
return
|
||
}
|
||
|
||
for {
|
||
if len(rightReplaySelectors) == 0 {
|
||
break
|
||
}
|
||
next := rightReplaySelectors[0]
|
||
rightReplaySelectors =
|
||
rightReplaySelectors[1:]
|
||
|
||
txn, err := d.clockStore.NewTransaction()
|
||
if err != nil {
|
||
panic(err)
|
||
}
|
||
|
||
if err := d.clockStore.CommitDataClockFrame(
|
||
d.filter,
|
||
frameNumber,
|
||
next,
|
||
d.proverTrie,
|
||
txn,
|
||
rightIndex.FrameNumber < d.head.FrameNumber,
|
||
); err != nil {
|
||
panic(err)
|
||
}
|
||
|
||
if err = txn.Commit(); err != nil {
|
||
panic(err)
|
||
}
|
||
|
||
frameNumber++
|
||
}
|
||
|
||
txn, err := d.clockStore.NewTransaction()
|
||
if err != nil {
|
||
panic(err)
|
||
}
|
||
|
||
if err := d.clockStore.CommitDataClockFrame(
|
||
d.filter,
|
||
frame.FrameNumber,
|
||
selector.FillBytes(make([]byte, 32)),
|
||
d.proverTrie,
|
||
txn,
|
||
false,
|
||
); err != nil {
|
||
panic(err)
|
||
}
|
||
|
||
if err = txn.Commit(); err != nil {
|
||
panic(err)
|
||
}
|
||
|
||
d.head = frame
|
||
d.totalDistance.Sub(d.totalDistance, leftTotal)
|
||
d.totalDistance.Add(d.totalDistance, rightTotal)
|
||
d.headDistance = distance
|
||
d.logger.Debug(
|
||
"set total distance",
|
||
zap.String("total_distance", d.totalDistance.Text(16)),
|
||
)
|
||
|
||
d.clockStore.SetTotalDistance(
|
||
d.filter,
|
||
frame.FrameNumber,
|
||
selector.FillBytes(make([]byte, 32)),
|
||
d.totalDistance,
|
||
)
|
||
|
||
go func() {
|
||
d.newFrameCh <- frame
|
||
}()
|
||
}
|
||
|
||
func (d *DataTimeReel) GetTotalDistance() *big.Int {
|
||
return new(big.Int).Set(d.totalDistance)
|
||
}
|
||
|
||
var _ TimeReel = (*DataTimeReel)(nil)
|