mirror of
https://source.quilibrium.com/quilibrium/ceremonyclient.git
synced 2024-12-26 00:25:17 +00:00
767 lines
18 KiB
Go
767 lines
18 KiB
Go
package time
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import (
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"bytes"
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"encoding/hex"
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"math/big"
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"sync"
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lru "github.com/hashicorp/golang-lru/v2"
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"github.com/pkg/errors"
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"go.uber.org/zap"
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"source.quilibrium.com/quilibrium/monorepo/node/config"
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"source.quilibrium.com/quilibrium/monorepo/node/crypto"
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"source.quilibrium.com/quilibrium/monorepo/node/protobufs"
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"source.quilibrium.com/quilibrium/monorepo/node/store"
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"source.quilibrium.com/quilibrium/monorepo/node/tries"
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)
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var allBitmaskFilter = []byte{
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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}
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var unknownDistance = new(big.Int).SetBytes([]byte{
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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})
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type pendingFrame struct {
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selector *big.Int
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parentSelector *big.Int
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}
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type DataTimeReel struct {
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rwMutex sync.RWMutex
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running bool
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filter []byte
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engineConfig *config.EngineConfig
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logger *zap.Logger
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clockStore store.ClockStore
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frameProver crypto.FrameProver
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parentTimeReel TimeReel
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origin []byte
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initialInclusionProof *crypto.InclusionAggregateProof
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initialProverKeys [][]byte
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head *protobufs.ClockFrame
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totalDistance *big.Int
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headDistance *big.Int
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lruFrames *lru.Cache[string, string]
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proverTrie *tries.RollingFrecencyCritbitTrie
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pending map[uint64][]*pendingFrame
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incompleteForks map[uint64][]*pendingFrame
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frames chan *protobufs.ClockFrame
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newFrameCh chan *protobufs.ClockFrame
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badFrameCh chan *protobufs.ClockFrame
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done chan bool
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}
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func NewDataTimeReel(
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filter []byte,
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logger *zap.Logger,
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clockStore store.ClockStore,
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engineConfig *config.EngineConfig,
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frameProver crypto.FrameProver,
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origin []byte,
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initialInclusionProof *crypto.InclusionAggregateProof,
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initialProverKeys [][]byte,
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) *DataTimeReel {
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if filter == nil {
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panic("filter is nil")
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}
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if logger == nil {
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panic("logger is nil")
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}
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if clockStore == nil {
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panic("clock store is nil")
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}
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if engineConfig == nil {
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panic("engine config is nil")
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}
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if frameProver == nil {
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panic("frame prover is nil")
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}
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cache, err := lru.New[string, string](10000)
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if err != nil {
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panic(err)
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}
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return &DataTimeReel{
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running: false,
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logger: logger,
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filter: filter,
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engineConfig: engineConfig,
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clockStore: clockStore,
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frameProver: frameProver,
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origin: origin,
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initialInclusionProof: initialInclusionProof,
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initialProverKeys: initialProverKeys,
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lruFrames: cache,
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pending: make(map[uint64][]*pendingFrame),
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incompleteForks: make(map[uint64][]*pendingFrame),
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frames: make(chan *protobufs.ClockFrame),
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newFrameCh: make(chan *protobufs.ClockFrame),
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badFrameCh: make(chan *protobufs.ClockFrame),
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done: make(chan bool),
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}
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}
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func (d *DataTimeReel) Start() error {
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trie := &tries.RollingFrecencyCritbitTrie{}
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frame, err := d.clockStore.GetLatestDataClockFrame(d.filter, trie)
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if err != nil && !errors.Is(err, store.ErrNotFound) {
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panic(err)
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}
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if frame == nil {
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d.head, d.proverTrie = d.createGenesisFrame()
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d.totalDistance = big.NewInt(0)
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d.headDistance = big.NewInt(0)
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} else {
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d.head = frame
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if err != nil {
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panic(err)
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}
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d.proverTrie = trie
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d.headDistance, err = d.GetDistance(frame)
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d.totalDistance = d.getTotalDistance(frame)
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}
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go d.runLoop()
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return nil
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}
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func (d *DataTimeReel) Head() (*protobufs.ClockFrame, error) {
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return d.head, nil
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}
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// Insert enqueues a structurally valid frame into the time reel. If the frame
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// is the next one in sequence, it advances the reel head forward and emits a
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// new frame on the new frame channel.
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func (d *DataTimeReel) Insert(frame *protobufs.ClockFrame) error {
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if !d.running {
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return nil
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}
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d.logger.Debug(
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"insert frame",
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zap.Uint64("frame_number", frame.FrameNumber),
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zap.String("output_tag", hex.EncodeToString(frame.Output[:64])),
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)
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if d.lruFrames.Contains(string(frame.Output[:64])) {
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return nil
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}
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d.lruFrames.Add(string(frame.Output[:64]), string(frame.ParentSelector))
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go func() {
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d.frames <- frame
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}()
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return nil
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}
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func (d *DataTimeReel) GetFrameProverTrie() *tries.RollingFrecencyCritbitTrie {
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return d.proverTrie
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}
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func (d *DataTimeReel) NewFrameCh() <-chan *protobufs.ClockFrame {
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return d.newFrameCh
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}
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func (d *DataTimeReel) BadFrameCh() <-chan *protobufs.ClockFrame {
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return d.badFrameCh
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}
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func (d *DataTimeReel) Stop() {
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d.done <- true
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}
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func (d *DataTimeReel) createGenesisFrame() (
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*protobufs.ClockFrame,
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*tries.RollingFrecencyCritbitTrie,
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) {
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if d.origin == nil {
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panic("origin is nil")
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}
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if d.initialInclusionProof == nil {
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panic("initial inclusion proof is nil")
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}
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if d.initialProverKeys == nil {
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panic("initial prover keys is nil")
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}
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difficulty := d.engineConfig.Difficulty
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if difficulty == 0 {
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difficulty = 10000
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}
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frame, trie, err := d.frameProver.CreateDataGenesisFrame(
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d.filter,
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d.origin,
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difficulty,
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d.initialInclusionProof,
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d.initialProverKeys,
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true,
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)
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if err != nil {
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panic(err)
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}
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txn, err := d.clockStore.NewTransaction()
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if err != nil {
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panic(err)
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}
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if err := d.clockStore.PutDataClockFrame(
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frame,
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trie,
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txn,
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false,
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); err != nil {
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panic(err)
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}
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if err := txn.Commit(); err != nil {
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panic(err)
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}
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return frame, trie
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}
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// Main data consensus loop
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func (d *DataTimeReel) runLoop() {
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d.running = true
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for {
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select {
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case frame := <-d.frames:
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d.logger.Debug(
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"processing frame",
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zap.Uint64("frame_number", frame.FrameNumber),
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zap.String("output_tag", hex.EncodeToString(frame.Output[:64])),
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zap.Uint64("head_number", d.head.FrameNumber),
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zap.String("head_output_tag", hex.EncodeToString(d.head.Output[:64])),
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)
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// Most common scenario: in order – new frame is higher number
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if d.head.FrameNumber < frame.FrameNumber {
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d.logger.Debug("frame is higher")
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parent := new(big.Int).SetBytes(frame.ParentSelector)
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selector, err := frame.GetSelector()
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if err != nil {
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panic(err)
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}
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distance, err := d.GetDistance(frame)
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if err != nil {
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d.logger.Debug("no master, add pending")
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// If the frame arrived ahead of a master, e.g. the master data is not
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// synced, we'll go ahead and mark it as pending and process it when
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// we can, but if we had a general fault, panic:
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if !errors.Is(err, store.ErrNotFound) {
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panic(err)
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}
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d.addPending(selector, parent, distance, frame)
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continue
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}
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headSelector, err := d.head.GetSelector()
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if err != nil {
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panic(err)
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}
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// If the frame has a gap from the head or is not descendent, mark it as
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// pending:
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if frame.FrameNumber-d.head.FrameNumber != 1 ||
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parent.Cmp(headSelector) != 0 {
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d.logger.Debug(
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"frame has has gap or is non-descendent, add pending",
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zap.Bool("has_gap", frame.FrameNumber-d.head.FrameNumber != 1),
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zap.String("parent_selector", parent.Text(16)),
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zap.String("head_selector", headSelector.Text(16)),
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)
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d.addPending(selector, parent, distance, frame)
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continue
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}
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// Otherwise set it as the next and process all pending
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d.setHead(frame, distance)
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d.processPending(d.head)
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} else if d.head.FrameNumber == frame.FrameNumber {
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// frames are equivalent, no need to act
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if bytes.Equal(d.head.Output, frame.Output) {
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d.logger.Debug("equivalent frame")
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d.processPending(d.head)
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continue
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}
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distance, err := d.GetDistance(frame)
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if err != nil {
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panic(err)
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}
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d.logger.Debug(
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"frame is same height",
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zap.String("head_distance", d.headDistance.Text(16)),
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zap.String("distance", distance.Text(16)),
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)
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// Optimization: if competing frames share a parent we can short-circuit
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// fork choice
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if bytes.Equal(d.head.ParentSelector, frame.ParentSelector) &&
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distance.Cmp(d.headDistance) < 0 {
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d.logger.Debug(
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"frame shares parent, has shorter distance, short circuit",
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)
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d.totalDistance.Sub(d.totalDistance, d.headDistance)
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d.setHead(frame, distance)
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d.processPending(d.head)
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continue
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}
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// Choose fork
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d.forkChoice(frame, distance)
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d.processPending(d.head)
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} else {
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d.logger.Debug("frame is lower height")
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// tag: dusk – we should have some kind of check here to avoid brutal
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// thrashing
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existing, _, err := d.clockStore.GetDataClockFrame(
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d.filter,
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frame.FrameNumber,
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)
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if err != nil {
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// if this returns an error it's either not found (which shouldn't
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// happen without corruption) or pebble is borked, either way, panic
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panic(err)
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}
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// It's a fork, but it's behind. We need to stash it until it catches
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// up (or dies off)
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if !bytes.Equal(existing.Output, frame.Output) {
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d.logger.Debug("is fork, add pending")
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distance, err := d.GetDistance(frame)
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if err != nil {
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panic(err)
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}
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parent, selector, err := frame.GetParentAndSelector()
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if err != nil {
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panic(err)
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}
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d.addPending(selector, parent, distance, frame)
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d.processPending(d.head)
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}
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}
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case <-d.done:
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return
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}
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}
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}
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func (d *DataTimeReel) addPending(
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selector *big.Int,
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parent *big.Int,
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distance *big.Int,
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frame *protobufs.ClockFrame,
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) {
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d.logger.Debug(
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"add pending",
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zap.Uint64("head_frame_number", d.head.FrameNumber),
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zap.Uint64("add_frame_number", frame.FrameNumber),
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zap.String("selector", selector.Text(16)),
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zap.String("parent", parent.Text(16)),
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zap.String("distance", distance.Text(16)),
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)
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if d.head.FrameNumber <= frame.FrameNumber {
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if _, ok := d.pending[frame.FrameNumber]; !ok {
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d.pending[frame.FrameNumber] = []*pendingFrame{}
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}
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// avoid heavy thrashing
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for _, frame := range d.pending[frame.FrameNumber] {
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if frame.selector.Cmp(selector) == 0 {
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d.logger.Debug("exists in pending already")
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return
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}
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}
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}
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// avoid db thrashing
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if existing, err := d.clockStore.GetParentDataClockFrame(
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frame.Filter,
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frame.FrameNumber,
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selector.FillBytes(make([]byte, 32)),
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); err != nil && existing == nil {
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d.logger.Debug(
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"not stored yet, save data candidate",
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zap.Uint64("frame_number", frame.FrameNumber),
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zap.String("selector", selector.Text(16)),
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zap.String("parent", parent.Text(16)),
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zap.String("distance", distance.Text(16)),
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)
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txn, err := d.clockStore.NewTransaction()
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if err != nil {
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panic(err)
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}
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err = d.clockStore.PutCandidateDataClockFrame(
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parent.FillBytes(make([]byte, 32)),
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distance.FillBytes(make([]byte, 32)),
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selector.FillBytes(make([]byte, 32)),
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frame,
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txn,
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)
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if err != nil {
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txn.Abort()
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panic(err)
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}
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if err = txn.Commit(); err != nil {
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panic(err)
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}
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}
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if d.head.FrameNumber <= frame.FrameNumber {
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d.logger.Debug(
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"accumulate in pending",
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zap.Int("pending_neighbors", len(d.pending[frame.FrameNumber])),
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)
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d.pending[frame.FrameNumber] = append(
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d.pending[frame.FrameNumber],
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&pendingFrame{
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selector: selector,
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parentSelector: parent,
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},
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)
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}
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}
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func (d *DataTimeReel) processPending(
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frame *protobufs.ClockFrame,
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) {
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d.logger.Debug("process pending")
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for f, nextPending := range d.pending {
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d.logger.Debug(
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"checking frame set",
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zap.Uint64("pending_frame_number", f),
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zap.Uint64("frame_number", frame.FrameNumber),
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)
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if f < frame.FrameNumber {
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d.logger.Debug(
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"purging frame set",
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zap.Uint64("pending_frame_number", f),
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zap.Uint64("frame_number", frame.FrameNumber),
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)
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delete(d.pending, f)
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continue
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}
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// Pull the next
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if nextPending != nil {
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d.logger.Debug("try process next")
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next := nextPending[0]
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d.pending[f] =
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d.pending[f][1:]
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nextFrame, err := d.clockStore.GetParentDataClockFrame(
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d.filter,
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f,
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next.selector.FillBytes(make([]byte, 32)),
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)
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if err != nil && !errors.Is(err, store.ErrNotFound) {
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panic(err)
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}
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if nextFrame != nil {
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d.pending[f] = append(d.pending[f], next)
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d.logger.Debug("next found, send frame back in")
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go func() {
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d.frames <- nextFrame
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}()
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}
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if len(d.pending[f]) == 0 {
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d.logger.Debug("last next processing, clear list")
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delete(d.pending, f)
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}
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}
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}
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}
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func (d *DataTimeReel) setHead(frame *protobufs.ClockFrame, distance *big.Int) {
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d.logger.Debug(
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"set frame to head",
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zap.Uint64("frame_number", frame.FrameNumber),
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zap.String("output_tag", hex.EncodeToString(frame.Output[:64])),
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zap.Uint64("head_number", d.head.FrameNumber),
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zap.String("head_output_tag", hex.EncodeToString(d.head.Output[:64])),
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)
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txn, err := d.clockStore.NewTransaction()
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if err != nil {
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panic(err)
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}
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d.logger.Debug(
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"save data",
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zap.Uint64("frame_number", frame.FrameNumber),
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zap.String("distance", distance.Text(16)),
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)
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if err := d.clockStore.PutDataClockFrame(
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frame,
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d.proverTrie,
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txn,
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false,
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); err != nil {
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panic(err)
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}
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if err = txn.Commit(); err != nil {
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panic(err)
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}
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d.head = frame
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d.totalDistance.Add(d.totalDistance, distance)
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d.headDistance = distance
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go func() {
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d.newFrameCh <- frame
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}()
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}
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// tag: dusk – store the distance with the frame
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func (d *DataTimeReel) getTotalDistance(frame *protobufs.ClockFrame) *big.Int {
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total, err := d.GetDistance(frame)
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if err != nil {
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panic(err)
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||
}
|
||
|
||
for index := frame; err == nil &&
|
||
index.FrameNumber > 0; index, err = d.clockStore.GetParentDataClockFrame(
|
||
d.filter,
|
||
index.FrameNumber-1,
|
||
index.ParentSelector,
|
||
) {
|
||
distance, err := d.GetDistance(index)
|
||
if err != nil {
|
||
panic(err)
|
||
}
|
||
|
||
total.Add(total, distance)
|
||
}
|
||
|
||
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)
|
||
rightTotal := new(big.Int).Set(distance)
|
||
left := d.head.ParentSelector
|
||
right := frame.ParentSelector
|
||
|
||
rightReplaySelectors := [][]byte{}
|
||
|
||
// Walk backwards through the parents, until we find a matching parent
|
||
// selector:
|
||
for !bytes.Equal(left, right) {
|
||
d.logger.Debug("scan backwards")
|
||
|
||
rightReplaySelectors = append(
|
||
append(
|
||
[][]byte{},
|
||
right,
|
||
),
|
||
rightReplaySelectors...,
|
||
)
|
||
leftIndex, err = d.clockStore.GetParentDataClockFrame(
|
||
d.filter,
|
||
leftIndex.FrameNumber-1,
|
||
leftIndex.ParentSelector,
|
||
)
|
||
if err != nil {
|
||
panic(err)
|
||
}
|
||
|
||
rightIndex, err = d.clockStore.GetParentDataClockFrame(
|
||
d.filter,
|
||
rightIndex.FrameNumber-1,
|
||
rightIndex.ParentSelector,
|
||
)
|
||
if err != nil {
|
||
// If lineage cannot be verified, set it for later
|
||
if errors.Is(err, store.ErrNotFound) {
|
||
d.addPending(selector, parentSelector, distance, frame)
|
||
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
|
||
|
||
// Choose new fork based on lightest distance sub-tree
|
||
if rightTotal.Cmp(leftTotal) > 0 {
|
||
d.logger.Debug("proposed fork has greater distance",
|
||
zap.String("right_total", rightTotal.Text(16)),
|
||
zap.String("left_total", leftTotal.Text(16)),
|
||
)
|
||
d.addPending(selector, parentSelector, distance, frame)
|
||
return
|
||
}
|
||
|
||
for {
|
||
if len(rightReplaySelectors) == 0 {
|
||
break
|
||
}
|
||
next := rightReplaySelectors[0]
|
||
rightReplaySelectors =
|
||
rightReplaySelectors[1:]
|
||
|
||
rightIndex, err = d.clockStore.GetParentDataClockFrame(
|
||
d.filter,
|
||
frameNumber,
|
||
next,
|
||
)
|
||
if err != nil {
|
||
panic(err)
|
||
}
|
||
|
||
txn, err := d.clockStore.NewTransaction()
|
||
if err != nil {
|
||
panic(err)
|
||
}
|
||
|
||
if err := d.clockStore.PutDataClockFrame(
|
||
rightIndex,
|
||
d.proverTrie,
|
||
txn,
|
||
false,
|
||
); 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.PutDataClockFrame(
|
||
frame,
|
||
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)),
|
||
)
|
||
go func() {
|
||
d.newFrameCh <- frame
|
||
}()
|
||
}
|
||
|
||
var _ TimeReel = (*DataTimeReel)(nil)
|