primitive storage + data clock store

node/app/db_console.go

@@ -0,0 +1,112 @@
+package app
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strings"
+
+	"source.quilibrium.com/quilibrium/monorepo/node/store"
+)
+
+type DBConsole struct {
+	clockStore store.ClockStore
+}
+
+func newDBConsole(
+	clockStore store.ClockStore,
+) (*DBConsole, error) {
+	return &DBConsole{
+		clockStore,
+	}, nil
+}
+
+// Runs the DB console, this is meant for simple debugging, not production use.
+func (c *DBConsole) Run() {
+	for {
+		fmt.Printf("db> ")
+
+		reader := bufio.NewReader(os.Stdin)
+		s, err := reader.ReadString('\n')
+		if err != nil {
+			panic(err)
+		}
+
+		cmd := strings.Trim(s, "\n")
+		switch cmd {
+		case "quit":
+			return
+		case "show frames":
+			earliestFrame, err := c.clockStore.GetEarliestMasterClockFrame([]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,
+			})
+			if err != nil {
+				panic(err)
+			}
+
+			latestFrame, err := c.clockStore.GetLatestMasterClockFrame([]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,
+			})
+			if err != nil {
+				panic(err)
+			}
+
+			fmt.Printf(
+				"earliest: %d, latest: %d\n",
+				earliestFrame.FrameNumber,
+				latestFrame.FrameNumber,
+			)
+
+			fmt.Printf(
+				"Genesis Frame:\n\tVDF Proof: %x\n",
+				earliestFrame.Input[:516],
+			)
+
+			iter, err := c.clockStore.RangeMasterClockFrames(
+				[]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,
+				},
+				earliestFrame.FrameNumber,
+				latestFrame.FrameNumber,
+			)
+			if err != nil {
+				panic(err)
+			}
+
+			for iter.First(); iter.Valid(); iter.Next() {
+				value, err := iter.Value()
+				if err != nil {
+					panic(err)
+				}
+
+				selector, err := value.GetSelector()
+				if err != nil {
+					panic(err)
+				}
+
+				fmt.Printf(
+					"Frame %d (Selector: %x):\n\tParent: %x\n\tVDF Proof: %x\n\n",
+					value.FrameNumber,
+					selector.Bytes(),
+					value.ParentSelector,
+					value.Input[:516],
+				)
+			}
+
+			if err := iter.Close(); err != nil {
+				panic(err)
+			}
+		default:
+			fmt.Printf("unknown command %s\n", cmd)
+		}
+	}
+}

node/app/wire.go

@@ -12,6 +12,7 @@ import (
 	"source.quilibrium.com/quilibrium/monorepo/node/execution/nop"
 	"source.quilibrium.com/quilibrium/monorepo/node/keys"
 	"source.quilibrium.com/quilibrium/monorepo/node/p2p"
+	"source.quilibrium.com/quilibrium/monorepo/node/store"
 )
 
 func logger() *zap.Logger {
@@ -33,6 +34,13 @@ var keyManagerSet = wire.NewSet(
 	wire.Bind(new(keys.KeyManager), new(*keys.FileKeyManager)),
 )
 
+var storeSet = wire.NewSet(
+	wire.FieldsOf(new(*config.Config), "DB"),
+	store.NewPebbleDB,
+	store.NewPebbleClockStore,
+	wire.Bind(new(store.ClockStore), new(*store.PebbleClockStore)),
+)
+
 var pubSubSet = wire.NewSet(
 	wire.FieldsOf(new(*config.Config), "P2P"),
 	p2p.NewBlossomSub,
@@ -46,9 +54,24 @@ var engineSet = wire.NewSet(
 var consensusSet = wire.NewSet(
 	wire.FieldsOf(new(*config.Config), "Engine"),
 	master.NewMasterClockConsensusEngine,
-	wire.Bind(new(consensus.ConsensusEngine), new(*master.MasterClockConsensusEngine)),
+	wire.Bind(
+		new(consensus.ConsensusEngine),
+		new(*master.MasterClockConsensusEngine),
+	),
 )
 
 func NewNode(*config.Config) (*Node, error) {
-	panic(wire.Build(loggerSet, keyManagerSet, pubSubSet, engineSet, consensusSet, newNode))
+	panic(wire.Build(
+		loggerSet,
+		keyManagerSet,
+		storeSet,
+		pubSubSet,
+		engineSet,
+		consensusSet,
+		newNode,
+	))
+}
+
+func NewDBConsole(*config.Config) (*DBConsole, error) {
+	panic(wire.Build(loggerSet, storeSet, newDBConsole))
 }

node/app/wire_gen.go

@@ -15,6 +15,7 @@ import (
 	"source.quilibrium.com/quilibrium/monorepo/node/execution/nop"
 	"source.quilibrium.com/quilibrium/monorepo/node/keys"
 	"source.quilibrium.com/quilibrium/monorepo/node/p2p"
+	"source.quilibrium.com/quilibrium/monorepo/node/store"
 )
 
 // Injectors from wire.go:
@@ -23,11 +24,14 @@ func NewNode(configConfig *config.Config) (*Node, error) {
 	zapLogger := logger()
 	nopExecutionEngine := nop.NewNopExecutionEngine(zapLogger)
 	engineConfig := configConfig.Engine
+	dbConfig := configConfig.DB
+	db := store.NewPebbleDB(dbConfig)
+	pebbleClockStore := store.NewPebbleClockStore(db, zapLogger)
 	keyConfig := configConfig.Key
 	fileKeyManager := keys.NewFileKeyManager(keyConfig, zapLogger)
 	p2PConfig := configConfig.P2P
 	blossomSub := p2p.NewBlossomSub(p2PConfig, zapLogger)
-	masterClockConsensusEngine := master.NewMasterClockConsensusEngine(engineConfig, zapLogger, fileKeyManager, blossomSub)
+	masterClockConsensusEngine := master.NewMasterClockConsensusEngine(engineConfig, zapLogger, pebbleClockStore, fileKeyManager, blossomSub)
 	node, err := newNode(nopExecutionEngine, masterClockConsensusEngine)
 	if err != nil {
 		return nil, err
@@ -35,6 +39,18 @@ func NewNode(configConfig *config.Config) (*Node, error) {
 	return node, nil
 }
 
+func NewDBConsole(configConfig *config.Config) (*DBConsole, error) {
+	dbConfig := configConfig.DB
+	db := store.NewPebbleDB(dbConfig)
+	zapLogger := logger()
+	pebbleClockStore := store.NewPebbleClockStore(db, zapLogger)
+	dbConsole, err := newDBConsole(pebbleClockStore)
+	if err != nil {
+		return nil, err
+	}
+	return dbConsole, nil
+}
+
 // wire.go:
 
 func logger() *zap.Logger {
@@ -52,8 +68,14 @@ var loggerSet = wire.NewSet(
 
 var keyManagerSet = wire.NewSet(wire.FieldsOf(new(*config.Config), "Key"), keys.NewFileKeyManager, wire.Bind(new(keys.KeyManager), new(*keys.FileKeyManager)))
 
+var storeSet = wire.NewSet(wire.FieldsOf(new(*config.Config), "DB"), store.NewPebbleDB, store.NewPebbleClockStore, wire.Bind(new(store.ClockStore), new(*store.PebbleClockStore)))
+
 var pubSubSet = wire.NewSet(wire.FieldsOf(new(*config.Config), "P2P"), p2p.NewBlossomSub, wire.Bind(new(p2p.PubSub), new(*p2p.BlossomSub)))
 
 var engineSet = wire.NewSet(nop.NewNopExecutionEngine)
 
-var consensusSet = wire.NewSet(wire.FieldsOf(new(*config.Config), "Engine"), master.NewMasterClockConsensusEngine, wire.Bind(new(consensus.ConsensusEngine), new(*master.MasterClockConsensusEngine)))
+var consensusSet = wire.NewSet(wire.FieldsOf(new(*config.Config), "Engine"), master.NewMasterClockConsensusEngine, wire.Bind(
+	new(consensus.ConsensusEngine),
+	new(*master.MasterClockConsensusEngine),
+),
+)

node/consensus/master/consensus_frames.go

@@ -238,8 +238,33 @@ func (
 		}
 	}
 
+	txn, err := e.clockStore.NewTransaction()
+	if err != nil {
+		e.logger.Error("error while creating transaction", zap.Error(err))
+		return nil, errors.Wrap(err, "confirm latest frame")
+	}
+
+	for _, frame := range committedSet {
+		if err = e.clockStore.PutMasterClockFrame(frame, txn); err != nil {
+			e.logger.Error("error while committing frame", zap.Error(err))
+			return nil, errors.Wrap(err, "confirm latest frame")
+		}
+	}
+
+	if err = txn.Commit(); err != nil {
+		e.logger.Error("error while committing transaction", zap.Error(err))
+		return nil, errors.Wrap(err, "confirm latest frame")
+	}
+
+	e.logger.Info("stored frames", zap.Int("frame_count", len(committedSet)))
+
 	e.historicFramesMx.Lock()
+
 	e.historicFrames = append(e.historicFrames, committedSet...)
+	if len(e.historicFrames) > 256 {
+		e.historicFrames = e.historicFrames[len(e.historicFrames)-256:]
+	}
+
 	e.historicFramesMx.Unlock()
 
 	e.setFrame(prev)

node/consensus/master/master_clock_consensus_engine.go

@@ -13,6 +13,7 @@ import (
 	"source.quilibrium.com/quilibrium/monorepo/node/keys"
 	"source.quilibrium.com/quilibrium/monorepo/node/p2p"
 	"source.quilibrium.com/quilibrium/monorepo/node/protobufs"
+	"source.quilibrium.com/quilibrium/monorepo/node/store"
 )
 
 type SyncStatusType int
@@ -42,9 +43,9 @@ type MasterClockConsensusEngine struct {
 	engineMx         sync.Mutex
 	seenFramesMx     sync.Mutex
 	historicFramesMx sync.Mutex
-	// for DHT testing, we're only using in memory stores
 	seenFrames       []*protobufs.ClockFrame
 	historicFrames   []*protobufs.ClockFrame
+	clockStore       store.ClockStore
 }
 
 var _ consensus.ConsensusEngine = (*MasterClockConsensusEngine)(nil)
@@ -52,6 +53,7 @@ var _ consensus.ConsensusEngine = (*MasterClockConsensusEngine)(nil)
 func NewMasterClockConsensusEngine(
 	engineConfig *config.EngineConfig,
 	logger *zap.Logger,
+	clockStore store.ClockStore,
 	keyManager keys.KeyManager,
 	pubSub p2p.PubSub,
 ) *MasterClockConsensusEngine {
@@ -88,6 +90,7 @@ func NewMasterClockConsensusEngine(
 		input:               seed,
 		lastFrameReceivedAt: time.Time{},
 		syncingStatus:       SyncStatusNotSyncing,
+		clockStore:          clockStore,
 	}
 
 	if e.filter, err = hex.DecodeString(engineConfig.Filter); err != nil {
@@ -107,8 +110,59 @@ func (e *MasterClockConsensusEngine) Start() <-chan error {
 	e.state = consensus.EngineStateLoading
 	e.logger.Info("syncing last seen state")
 
-	latestFrame := e.createGenesisFrame()
+	latestFrame, err := e.clockStore.GetLatestMasterClockFrame(e.filter)
-	e.historicFrames = []*protobufs.ClockFrame{latestFrame}
+	if err != nil && errors.Is(err, store.ErrNotFound) {
+		latestFrame = e.createGenesisFrame()
+		txn, err := e.clockStore.NewTransaction()
+		if err != nil {
+			panic(err)
+		}
+
+		if err = e.clockStore.PutMasterClockFrame(latestFrame, txn); err != nil {
+			panic(err)
+		}
+
+		if err = txn.Commit(); err != nil {
+			panic(err)
+		}
+	} else if err != nil {
+		panic(err)
+	} else {
+		e.setFrame(latestFrame)
+	}
+
+	e.historicFrames = []*protobufs.ClockFrame{}
+
+	if latestFrame.FrameNumber != 0 {
+		min := uint64(0)
+		if latestFrame.FrameNumber-255 > min {
+			min = latestFrame.FrameNumber - 255
+		}
+
+		iter, err := e.clockStore.RangeMasterClockFrames(
+			e.filter,
+			min,
+			latestFrame.FrameNumber-1,
+		)
+		if err != nil {
+			panic(err)
+		}
+
+		for iter.First(); iter.Valid(); iter.Next() {
+			frame, err := iter.Value()
+			if err != nil {
+				panic(err)
+			}
+
+			e.historicFrames = append(e.historicFrames, frame)
+		}
+
+		if err = iter.Close(); err != nil {
+			panic(err)
+		}
+	}
+
+	e.historicFrames = append(e.historicFrames, latestFrame)
 
 	e.logger.Info("subscribing to pubsub messages")
 	e.pubSub.Subscribe(e.filter, e.handleMessage, true)

node/consensus/master/peer_messaging.go

@@ -225,11 +225,35 @@ func (e *MasterClockConsensusEngine) handleClockFramesRequest(
 		zap.Uint64("total_frames", uint64(to-from+1)),
 	)
 
+	iter, err := e.clockStore.RangeMasterClockFrames(
+		request.Filter,
+		from,
+		to,
+	)
+	if err != nil {
+		return errors.Wrap(err, "handle clock frame request")
+	}
+
+	response := []*protobufs.ClockFrame{}
+
+	for iter.First(); iter.Valid(); iter.Next() {
+		frame, err := iter.Value()
+		if err != nil {
+			return errors.Wrap(err, "handle clock frame request")
+		}
+
+		response = append(response, frame)
+	}
+
+	if err = iter.Close(); err != nil {
+		return errors.Wrap(err, "handle clock frame request")
+	}
+
 	if err := e.publishMessage(channel, &protobufs.ClockFramesResponse{
 		Filter:          request.Filter,
 		FromFrameNumber: request.FromFrameNumber,
 		ToFrameNumber:   to,
-		ClockFrames:     e.historicFrames[from:to],
+		ClockFrames:     response,
 	}); err != nil {
 		return errors.Wrap(err, "handle clock frame request")
 	}

node/main.go

@@ -16,8 +16,21 @@ import (
 )
 
 var (
-	configDirectory = flag.String("config", "./.config/", "the configuration directory")
+	configDirectory = flag.String(
-	importPrivKey   = flag.String("import-priv-key", "", "creates a new config using a specific key from the phase one ceremony")
+		"config",
+		"./.config/",
+		"the configuration directory",
+	)
+	importPrivKey = flag.String(
+		"import-priv-key",
+		"",
+		"creates a new config using a specific key from the phase one ceremony",
+	)
+	dbConsole = flag.Bool(
+		"db-console",
+		false,
+		"starts the node in database console mode",
+	)
 )
 
 func main() {
@@ -45,6 +58,16 @@ func main() {
 		panic(err)
 	}
 
+	if *dbConsole {
+		console, err := app.NewDBConsole(nodeConfig)
+		if err != nil {
+			panic(err)
+		}
+
+		console.Run()
+		return
+	}
+
 	node, err := app.NewNode(nodeConfig)
 	if err != nil {
 		panic(err)

node/store/clock.go

@@ -0,0 +1,778 @@
+package store
+
+import (
+	"encoding/binary"
+
+	"github.com/cockroachdb/pebble"
+	"github.com/pkg/errors"
+	"go.uber.org/zap"
+	"google.golang.org/protobuf/proto"
+	"source.quilibrium.com/quilibrium/monorepo/node/protobufs"
+	"source.quilibrium.com/quilibrium/monorepo/node/tries"
+)
+
+type ClockStore interface {
+	NewTransaction() (Transaction, error)
+	GetLatestMasterClockFrame(filter []byte) (*protobufs.ClockFrame, error)
+	GetEarliestMasterClockFrame(filter []byte) (*protobufs.ClockFrame, error)
+	GetMasterClockFrame(
+		filter []byte,
+		frameNumber uint64,
+	) (*protobufs.ClockFrame, error)
+	RangeMasterClockFrames(
+		filter []byte,
+		startFrameNumber uint64,
+		endFrameNumber uint64,
+	) (*PebbleMasterClockIterator, error)
+	PutMasterClockFrame(frame *protobufs.ClockFrame, txn Transaction) error
+	GetLatestDataClockFrame(
+		filter []byte,
+		proverTrie *tries.RollingFrecencyCritbitTrie,
+	) (*protobufs.ClockFrame, error)
+	GetEarliestDataClockFrame(filter []byte) (*protobufs.ClockFrame, error)
+	GetDataClockFrame(
+		filter []byte,
+		frameNumber uint64,
+	) (*protobufs.ClockFrame, error)
+	RangeDataClockFrames(
+		filter []byte,
+		startFrameNumber uint64,
+		endFrameNumber uint64,
+	) (*PebbleClockIterator, error)
+	PutDataClockFrame(
+		frame *protobufs.ClockFrame,
+		proverTrie *tries.RollingFrecencyCritbitTrie,
+		txn Transaction,
+	) error
+	PutCandidateDataClockFrame(
+		parentSelector []byte,
+		distance []byte,
+		selector []byte,
+		frame *protobufs.ClockFrame,
+		txn Transaction,
+	) error
+	GetParentDataClockFrame(
+		filter []byte,
+		frameNumber uint64,
+		parentSelector []byte,
+	) (*protobufs.ClockFrame, error)
+	RangeCandidateDataClockFrames(
+		filter []byte,
+		parent []byte,
+		frameNumber uint64,
+	) (*PebbleCandidateClockIterator, error)
+	GetLeadingCandidateDataClockFrame(
+		filter []byte,
+		parent []byte,
+		frameNumber uint64,
+	) (*protobufs.ClockFrame, error)
+}
+
+type PebbleClockStore struct {
+	db     *pebble.DB
+	logger *zap.Logger
+}
+
+var _ ClockStore = (*PebbleClockStore)(nil)
+
+type PebbleMasterClockIterator struct {
+	i *pebble.Iterator
+}
+
+type PebbleClockIterator struct {
+	i *pebble.Iterator
+}
+
+type PebbleCandidateClockIterator struct {
+	i *pebble.Iterator
+}
+
+var _ Iterator[*protobufs.ClockFrame] = (*PebbleMasterClockIterator)(nil)
+var _ Iterator[*protobufs.ClockFrame] = (*PebbleClockIterator)(nil)
+var _ Iterator[*protobufs.ClockFrame] = (*PebbleCandidateClockIterator)(nil)
+
+func (p *PebbleMasterClockIterator) First() bool {
+	return p.i.First()
+}
+
+func (p *PebbleMasterClockIterator) Next() bool {
+	return p.i.Next()
+}
+
+func (p *PebbleMasterClockIterator) Valid() bool {
+	return p.i.Valid()
+}
+
+func (p *PebbleMasterClockIterator) Value() (*protobufs.ClockFrame, error) {
+	if !p.i.Valid() {
+		return nil, ErrNotFound
+	}
+
+	key := p.i.Key()
+	value := p.i.Value()
+	frame := &protobufs.ClockFrame{}
+
+	frameNumber, filter, err := extractFrameNumberAndFilterFromMasterFrameKey(key)
+	if err != nil {
+		return nil, errors.Wrap(err, "get master clock frame iterator value")
+	}
+
+	frame.FrameNumber = frameNumber
+	frame.Filter = filter
+
+	if len(value) < 521 {
+		return nil, errors.Wrap(
+			ErrInvalidData,
+			"get master clock frame iterator value",
+		)
+	}
+
+	frame.Difficulty = binary.BigEndian.Uint32(value[:4])
+	frame.Input = value[4 : len(value)-516]
+	frame.Output = value[len(value)-516:]
+
+	return frame, nil
+}
+
+func (p *PebbleMasterClockIterator) Close() error {
+	return errors.Wrap(p.i.Close(), "closing master clock iterator")
+}
+
+func (p *PebbleClockIterator) First() bool {
+	return p.i.First()
+}
+
+func (p *PebbleClockIterator) Next() bool {
+	return p.i.Next()
+}
+
+func (p *PebbleClockIterator) Valid() bool {
+	return p.i.Valid()
+}
+
+func (p *PebbleClockIterator) Value() (*protobufs.ClockFrame, error) {
+	if !p.i.Valid() {
+		return nil, ErrNotFound
+	}
+
+	value := p.i.Value()
+	frame := &protobufs.ClockFrame{}
+	if err := proto.Unmarshal(value, frame); err != nil {
+		return nil, errors.Wrap(
+			errors.Wrap(err, ErrInvalidData.Error()),
+			"get clock frame iterator value",
+		)
+	}
+
+	return frame, nil
+}
+
+func (p *PebbleClockIterator) Close() error {
+	return errors.Wrap(p.i.Close(), "closing clock frame iterator")
+}
+
+func (p *PebbleCandidateClockIterator) First() bool {
+	return p.i.First()
+}
+
+func (p *PebbleCandidateClockIterator) Next() bool {
+	return p.i.Next()
+}
+
+func (p *PebbleCandidateClockIterator) Valid() bool {
+	return p.i.Valid()
+}
+
+func (p *PebbleCandidateClockIterator) Value() (*protobufs.ClockFrame, error) {
+	if !p.i.Valid() {
+		return nil, ErrNotFound
+	}
+
+	value := p.i.Value()
+	frame := &protobufs.ClockFrame{}
+	if err := proto.Unmarshal(value, frame); err != nil {
+		return nil, errors.Wrap(
+			errors.Wrap(err, ErrInvalidData.Error()),
+			"get candidate clock frame iterator value",
+		)
+	}
+
+	return frame, nil
+}
+
+func (p *PebbleCandidateClockIterator) Close() error {
+	return errors.Wrap(p.i.Close(), "closing candidate clock frame iterator")
+}
+
+func NewPebbleClockStore(db *pebble.DB, logger *zap.Logger) *PebbleClockStore {
+	return &PebbleClockStore{
+		db,
+		logger,
+	}
+}
+
+const CLOCK_FRAME = 0x00
+const CLOCK_MASTER_FRAME_DATA = 0x00
+const CLOCK_DATA_FRAME_DATA = 0x01
+const CLOCK_DATA_FRAME_CANDIDATE_DATA = 0x02
+const CLOCK_DATA_FRAME_FRECENCY_DATA = 0x03
+const CLOCK_MASTER_FRAME_INDEX_EARLIEST = 0x10 | CLOCK_MASTER_FRAME_DATA
+const CLOCK_MASTER_FRAME_INDEX_LATEST = 0x20 | CLOCK_MASTER_FRAME_DATA
+const CLOCK_MASTER_FRAME_INDEX_PARENT = 0x30 | CLOCK_MASTER_FRAME_DATA
+const CLOCK_DATA_FRAME_INDEX_EARLIEST = 0x10 | CLOCK_DATA_FRAME_DATA
+const CLOCK_DATA_FRAME_INDEX_LATEST = 0x20 | CLOCK_DATA_FRAME_DATA
+const CLOCK_DATA_FRAME_INDEX_PARENT = 0x30 | CLOCK_DATA_FRAME_DATA
+
+//
+// DB Keys
+//
+// Keys are structured as:
+// <core type><sub type | index>[<non-index increment>]<segment>
+// Increment necessarily must be full width – elsewise the frame number would
+// easily produce conflicts if filters are stepped by byte:
+// 0x01 || 0xffff == 0x01ff || 0xff
+//
+// Master frames are serialized as output data only, Data frames are raw
+// protobufs for fast disk-to-network output.
+
+func clockFrameKey(filter []byte, frameNumber uint64, frameType byte) []byte {
+	key := []byte{CLOCK_FRAME, frameType}
+	key = binary.BigEndian.AppendUint64(key, frameNumber)
+	key = append(key, filter...)
+	return key
+}
+
+func clockMasterFrameKey(filter []byte, frameNumber uint64) []byte {
+	return clockFrameKey(filter, frameNumber, CLOCK_MASTER_FRAME_DATA)
+}
+
+func extractFrameNumberAndFilterFromMasterFrameKey(
+	key []byte,
+) (uint64, []byte, error) {
+	if len(key) < 11 {
+		return 0, nil, errors.Wrap(
+			ErrInvalidData,
+			"extract frame number and filter from master frame key",
+		)
+	}
+
+	return binary.BigEndian.Uint64(key[2:10]), key[10:], nil
+}
+
+func clockDataFrameKey(
+	filter []byte,
+	frameNumber uint64,
+) []byte {
+	return clockFrameKey(filter, frameNumber, CLOCK_DATA_FRAME_DATA)
+}
+
+func clockLatestIndex(filter []byte, frameType byte) []byte {
+	key := []byte{CLOCK_FRAME, frameType}
+	key = append(key, filter...)
+	return key
+}
+
+func clockMasterLatestIndex(filter []byte) []byte {
+	return clockLatestIndex(filter, CLOCK_MASTER_FRAME_INDEX_LATEST)
+}
+
+func clockDataLatestIndex(filter []byte) []byte {
+	return clockLatestIndex(filter, CLOCK_DATA_FRAME_INDEX_LATEST)
+}
+
+func clockEarliestIndex(filter []byte, frameType byte) []byte {
+	key := []byte{CLOCK_FRAME, frameType}
+	key = append(key, filter...)
+	return key
+}
+
+func clockMasterEarliestIndex(filter []byte) []byte {
+	return clockEarliestIndex(filter, CLOCK_MASTER_FRAME_INDEX_EARLIEST)
+}
+
+func clockDataEarliestIndex(filter []byte) []byte {
+	return clockEarliestIndex(filter, CLOCK_DATA_FRAME_INDEX_EARLIEST)
+}
+
+func clockParentIndexKey(
+	filter []byte,
+	frameNumber uint64,
+	selector []byte,
+	frameType byte,
+) []byte {
+	key := []byte{CLOCK_FRAME, frameType}
+	key = binary.BigEndian.AppendUint64(key, frameNumber)
+	key = append(key, filter...)
+	key = append(key, rightAlign(selector, 32)...)
+	return key
+}
+
+func clockDataParentIndexKey(
+	filter []byte,
+	frameNumber uint64,
+	selector []byte,
+) []byte {
+	return clockParentIndexKey(
+		filter,
+		frameNumber,
+		selector,
+		CLOCK_DATA_FRAME_INDEX_PARENT,
+	)
+}
+
+func clockDataCandidateFrameKey(
+	filter []byte,
+	frameNumber uint64,
+	parent []byte,
+	distance []byte,
+) []byte {
+	key := []byte{CLOCK_FRAME, CLOCK_DATA_FRAME_CANDIDATE_DATA}
+	key = binary.BigEndian.AppendUint64(key, frameNumber)
+	key = append(key, filter...)
+	key = append(key, rightAlign(parent, 32)...)
+	key = append(key, rightAlign(distance, 32)...)
+	return key
+}
+
+func clockProverTrieKey(filter []byte, frameNumber uint64) []byte {
+	key := []byte{CLOCK_FRAME, CLOCK_DATA_FRAME_FRECENCY_DATA}
+	key = binary.BigEndian.AppendUint64(key, frameNumber)
+	key = append(key, filter...)
+	return key
+}
+
+func (p *PebbleClockStore) NewTransaction() (Transaction, error) {
+	return &PebbleTransaction{
+		b: p.db.NewBatch(),
+	}, nil
+}
+
+// GetEarliestMasterClockFrame implements ClockStore.
+func (p *PebbleClockStore) GetEarliestMasterClockFrame(
+	filter []byte,
+) (*protobufs.ClockFrame, error) {
+	idxValue, closer, err := p.db.Get(clockMasterEarliestIndex(filter))
+	if err != nil {
+		if errors.Is(err, pebble.ErrNotFound) {
+			return nil, ErrNotFound
+		}
+
+		return nil, errors.Wrap(err, "get earliest master clock frame")
+	}
+
+	defer closer.Close()
+	frameNumber := binary.BigEndian.Uint64(idxValue)
+	frame, err := p.GetMasterClockFrame(filter, frameNumber)
+	if err != nil {
+		return nil, errors.Wrap(err, "get earliest master clock frame")
+	}
+
+	return frame, nil
+}
+
+// GetLatestMasterClockFrame implements ClockStore.
+func (p *PebbleClockStore) GetLatestMasterClockFrame(
+	filter []byte,
+) (*protobufs.ClockFrame, error) {
+	idxValue, closer, err := p.db.Get(clockMasterLatestIndex(filter))
+	if err != nil {
+		if errors.Is(err, pebble.ErrNotFound) {
+			return nil, ErrNotFound
+		}
+
+		return nil, errors.Wrap(err, "get latest master clock frame")
+	}
+
+	defer closer.Close()
+	frameNumber := binary.BigEndian.Uint64(idxValue)
+	frame, err := p.GetMasterClockFrame(filter, frameNumber)
+	if err != nil {
+		return nil, errors.Wrap(err, "get latest master clock frame")
+	}
+
+	return frame, nil
+}
+
+// GetMasterClockFrame implements ClockStore.
+func (p *PebbleClockStore) GetMasterClockFrame(
+	filter []byte,
+	frameNumber uint64,
+) (*protobufs.ClockFrame, error) {
+	value, closer, err := p.db.Get(clockMasterFrameKey(filter, frameNumber))
+	if err != nil {
+		if errors.Is(err, pebble.ErrNotFound) {
+			return nil, ErrNotFound
+		}
+
+		return nil, errors.Wrap(err, "get master clock frame")
+	}
+
+	defer closer.Close()
+	frame := &protobufs.ClockFrame{}
+	frame.FrameNumber = frameNumber
+	frame.Filter = filter
+	frame.Difficulty = binary.BigEndian.Uint32(value[:4])
+	frame.Input = value[4 : len(value)-516]
+	frame.Output = value[len(value)-516:]
+
+	return frame, nil
+}
+
+// RangeMasterClockFrames implements ClockStore.
+func (p *PebbleClockStore) RangeMasterClockFrames(
+	filter []byte,
+	startFrameNumber uint64,
+	endFrameNumber uint64,
+) (*PebbleMasterClockIterator, error) {
+	if startFrameNumber > endFrameNumber {
+		temp := endFrameNumber
+		endFrameNumber = startFrameNumber
+		startFrameNumber = temp
+	}
+
+	iter := p.db.NewIter(&pebble.IterOptions{
+		LowerBound: clockMasterFrameKey(filter, startFrameNumber),
+		UpperBound: clockMasterFrameKey(filter, endFrameNumber),
+	})
+
+	return &PebbleMasterClockIterator{i: iter}, nil
+}
+
+// PutMasterClockFrame implements ClockStore.
+func (p *PebbleClockStore) PutMasterClockFrame(
+	frame *protobufs.ClockFrame,
+	txn Transaction,
+) error {
+	data := binary.BigEndian.AppendUint32([]byte{}, frame.Difficulty)
+	data = append(data, frame.Input...)
+	data = append(data, frame.Output...)
+
+	frameNumberBytes := make([]byte, 8)
+	binary.BigEndian.PutUint64(frameNumberBytes, frame.FrameNumber)
+
+	if err := txn.Set(
+		clockMasterFrameKey(frame.Filter, frame.FrameNumber),
+		data,
+	); err != nil {
+		return errors.Wrap(err, "put master clock frame")
+	}
+
+	_, closer, err := p.db.Get(clockMasterEarliestIndex(frame.Filter))
+	if err != nil {
+		if !errors.Is(err, pebble.ErrNotFound) {
+			return errors.Wrap(err, "put master clock frame")
+		}
+
+		if err = txn.Set(
+			clockMasterEarliestIndex(frame.Filter),
+			frameNumberBytes,
+		); err != nil {
+			return errors.Wrap(err, "put master clock frame")
+		}
+	}
+
+	if err == nil && closer != nil {
+		closer.Close()
+	}
+
+	if err = txn.Set(
+		clockMasterLatestIndex(frame.Filter),
+		frameNumberBytes,
+	); err != nil {
+		return errors.Wrap(err, "put master clock frame")
+	}
+
+	return nil
+}
+
+// GetDataClockFrame implements ClockStore.
+func (p *PebbleClockStore) GetDataClockFrame(
+	filter []byte,
+	frameNumber uint64,
+) (*protobufs.ClockFrame, error) {
+	value, closer, err := p.db.Get(clockDataFrameKey(filter, frameNumber))
+	if err != nil {
+		if errors.Is(err, pebble.ErrNotFound) {
+			return nil, ErrNotFound
+		}
+
+		return nil, errors.Wrap(err, "get data clock frame")
+	}
+
+	defer closer.Close()
+	frame := &protobufs.ClockFrame{}
+	if err := proto.Unmarshal(value, frame); err != nil {
+		return nil, errors.Wrap(
+			errors.Wrap(err, ErrInvalidData.Error()),
+			"get data clock frame",
+		)
+	}
+
+	return frame, nil
+}
+
+// GetEarliestDataClockFrame implements ClockStore.
+func (p *PebbleClockStore) GetEarliestDataClockFrame(
+	filter []byte,
+) (*protobufs.ClockFrame, error) {
+	idxValue, closer, err := p.db.Get(clockDataEarliestIndex(filter))
+	if err != nil {
+		if errors.Is(err, pebble.ErrNotFound) {
+			return nil, ErrNotFound
+		}
+
+		return nil, errors.Wrap(err, "get earliest data clock frame")
+	}
+
+	defer closer.Close()
+	frameNumber := binary.BigEndian.Uint64(idxValue)
+	frame, err := p.GetDataClockFrame(filter, frameNumber)
+	if err != nil {
+		return nil, errors.Wrap(err, "get earliest data clock frame")
+	}
+
+	return frame, nil
+}
+
+// GetLatestDataClockFrame implements ClockStore.
+func (p *PebbleClockStore) GetLatestDataClockFrame(
+	filter []byte,
+	proverTrie *tries.RollingFrecencyCritbitTrie,
+) (*protobufs.ClockFrame, error) {
+	idxValue, closer, err := p.db.Get(clockDataLatestIndex(filter))
+	if err != nil {
+		if errors.Is(err, pebble.ErrNotFound) {
+			return nil, ErrNotFound
+		}
+
+		return nil, errors.Wrap(err, "get latest data clock frame")
+	}
+
+	frameNumber := binary.BigEndian.Uint64(idxValue)
+	frame, err := p.GetDataClockFrame(filter, frameNumber)
+	if err != nil {
+		return nil, errors.Wrap(err, "get latest data clock frame")
+	}
+
+	closer.Close()
+	if proverTrie != nil {
+		trieData, closer, err := p.db.Get(clockProverTrieKey(filter, frameNumber))
+		if err != nil {
+			return nil, errors.Wrap(err, "get latest data clock frame")
+		}
+
+		defer closer.Close()
+
+		if err := proverTrie.Deserialize(trieData); err != nil {
+			return nil, errors.Wrap(err, "get latest data clock frame")
+		}
+	}
+
+	return frame, nil
+}
+
+// GetLeadingCandidateDataClockFrame implements ClockStore.
+func (p *PebbleClockStore) GetLeadingCandidateDataClockFrame(
+	filter []byte,
+	parent []byte,
+	frameNumber uint64,
+) (*protobufs.ClockFrame, error) {
+	iter, err := p.RangeCandidateDataClockFrames(filter, parent, frameNumber)
+	if err != nil {
+		return nil, errors.Wrap(err, "get leading candidate data clock frame")
+	}
+
+	if !iter.First() {
+		return nil, ErrNotFound
+	}
+
+	defer iter.Close()
+	frame, err := iter.Value()
+	return frame, errors.Wrap(err, "get leading candidate data clock frame")
+}
+
+// GetParentDataClockFrame implements ClockStore.
+func (p *PebbleClockStore) GetParentDataClockFrame(
+	filter []byte,
+	frameNumber uint64,
+	parentSelector []byte,
+) (*protobufs.ClockFrame, error) {
+	data, closer, err := p.db.Get(
+		clockDataParentIndexKey(filter, frameNumber, parentSelector),
+	)
+	if err != nil {
+		return nil, errors.Wrap(err, "get parent data clock frame")
+	}
+
+	parent := &protobufs.ClockFrame{}
+	if err := proto.Unmarshal(data, parent); err != nil {
+		return nil, errors.Wrap(err, "get parent data clock frame")
+	}
+
+	if closer != nil {
+		closer.Close()
+	}
+
+	return parent, nil
+}
+
+// PutCandidateDataClockFrame implements ClockStore.
+func (p *PebbleClockStore) PutCandidateDataClockFrame(
+	parentSelector []byte,
+	distance []byte,
+	selector []byte,
+	frame *protobufs.ClockFrame,
+	txn Transaction,
+) error {
+	data, err := proto.Marshal(frame)
+	if err != nil {
+		return errors.Wrap(
+			errors.Wrap(err, ErrInvalidData.Error()),
+			"put candidate data clock frame",
+		)
+	}
+
+	if err = txn.Set(
+		clockDataCandidateFrameKey(
+			frame.Filter,
+			frame.FrameNumber,
+			frame.ParentSelector,
+			distance,
+		),
+		data,
+	); err != nil {
+		return errors.Wrap(err, "put candidate data clock frame")
+	}
+
+	if err = txn.Set(
+		clockDataParentIndexKey(
+			frame.Filter,
+			frame.FrameNumber,
+			selector,
+		),
+		data,
+	); err != nil {
+		return errors.Wrap(err, "put candidate data clock frame")
+	}
+
+	return nil
+}
+
+// PutDataClockFrame implements ClockStore.
+func (p *PebbleClockStore) PutDataClockFrame(
+	frame *protobufs.ClockFrame,
+	proverTrie *tries.RollingFrecencyCritbitTrie,
+	txn Transaction,
+) error {
+	data, err := proto.Marshal(frame)
+	if err != nil {
+		return errors.Wrap(
+			errors.Wrap(err, ErrInvalidData.Error()),
+			"put data clock frame",
+		)
+	}
+
+	frameNumberBytes := make([]byte, 8)
+	binary.BigEndian.PutUint64(frameNumberBytes, frame.FrameNumber)
+
+	if err = txn.Set(
+		clockDataFrameKey(frame.Filter, frame.FrameNumber),
+		data,
+	); err != nil {
+		return errors.Wrap(err, "put data clock frame")
+	}
+
+	proverData, err := proverTrie.Serialize()
+	if err != nil {
+		return errors.Wrap(err, "put data clock frame")
+	}
+
+	if err = txn.Set(
+		clockProverTrieKey(frame.Filter, frame.FrameNumber),
+		proverData,
+	); err != nil {
+		return errors.Wrap(err, "put data clock frame")
+	}
+
+	_, closer, err := p.db.Get(clockDataEarliestIndex(frame.Filter))
+	if err != nil {
+		if !errors.Is(err, pebble.ErrNotFound) {
+			return errors.Wrap(err, "put data clock frame")
+		}
+
+		if err = txn.Set(
+			clockDataEarliestIndex(frame.Filter),
+			frameNumberBytes,
+		); err != nil {
+			return errors.Wrap(err, "put data clock frame")
+		}
+	}
+
+	if err == nil && closer != nil {
+		closer.Close()
+	}
+
+	if err = txn.Set(
+		clockDataLatestIndex(frame.Filter),
+		frameNumberBytes,
+	); err != nil {
+		return errors.Wrap(err, "put data clock frame")
+	}
+
+	return nil
+}
+
+// RangeCandidateDataClockFrames implements ClockStore.
+// Distance is 32-byte aligned, so we just use a 0x00 * 32 -> 0xff * 32 range
+func (p *PebbleClockStore) RangeCandidateDataClockFrames(
+	filter []byte,
+	parent []byte,
+	frameNumber uint64,
+) (*PebbleCandidateClockIterator, error) {
+	iter := p.db.NewIter(&pebble.IterOptions{
+		LowerBound: clockDataCandidateFrameKey(
+			filter,
+			frameNumber,
+			parent,
+			[]byte{
+				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+			},
+		),
+		UpperBound: clockDataCandidateFrameKey(
+			filter,
+			frameNumber,
+			parent,
+			[]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,
+			},
+		),
+	})
+
+	return &PebbleCandidateClockIterator{i: iter}, nil
+}
+
+// RangeDataClockFrames implements ClockStore.
+func (p *PebbleClockStore) RangeDataClockFrames(
+	filter []byte,
+	startFrameNumber uint64,
+	endFrameNumber uint64,
+) (*PebbleClockIterator, error) {
+	if startFrameNumber > endFrameNumber {
+		temp := endFrameNumber
+		endFrameNumber = startFrameNumber
+		startFrameNumber = temp
+	}
+
+	iter := p.db.NewIter(&pebble.IterOptions{
+		LowerBound: clockDataFrameKey(filter, startFrameNumber),
+		UpperBound: clockDataFrameKey(filter, endFrameNumber),
+	})
+
+	return &PebbleClockIterator{i: iter}, nil
+}

node/store/errors.go

@@ -0,0 +1,8 @@
+package store
+
+import "errors"
+
+var (
+	ErrNotFound    = errors.New("item not found")
+	ErrInvalidData = errors.New("invalid data")
+)

node/store/iterator.go

@@ -0,0 +1,11 @@
+package store
+
+import "google.golang.org/protobuf/proto"
+
+type Iterator[T proto.Message] interface {
+	First() bool
+	Next() bool
+	Valid() bool
+	Value() (T, error)
+	Close() error
+}

node/store/key.go

@@ -0,0 +1,531 @@
+package store
+
+import (
+	"encoding/binary"
+
+	"github.com/cockroachdb/pebble"
+	"github.com/pkg/errors"
+	"go.uber.org/zap"
+	"google.golang.org/protobuf/proto"
+	"source.quilibrium.com/quilibrium/monorepo/node/protobufs"
+)
+
+type KeyStore interface {
+	NewTransaction() (Transaction, error)
+	StageProvingKey(provingKey *protobufs.ProvingKeyAnnouncement) error
+	IncludeProvingKey(
+		inclusionCommitment *protobufs.InclusionCommitment,
+		txn Transaction,
+	) error
+	GetStagedProvingKey(
+		provingKey []byte,
+	) (*protobufs.ProvingKeyAnnouncement, error)
+	GetProvingKey(provingKey []byte) (*protobufs.InclusionCommitment, error)
+	GetKeyBundle(
+		provingKey []byte,
+		frameNumber uint64,
+	) (*protobufs.InclusionCommitment, error)
+	GetLatestKeyBundle(provingKey []byte) (*protobufs.InclusionCommitment, error)
+	PutKeyBundle(
+		provingKey []byte,
+		keyBundleCommitment *protobufs.InclusionCommitment,
+		txn Transaction,
+	) error
+	RangeProvingKeys() (*PebbleProvingKeyIterator, error)
+	RangeStagedProvingKeys() (*PebbleStagedProvingKeyIterator, error)
+	RangeKeyBundleKeys(provingKey []byte) (*PebbleKeyBundleIterator, error)
+}
+
+type PebbleKeyStore struct {
+	db     *pebble.DB
+	logger *zap.Logger
+}
+
+type PebbleProvingKeyIterator struct {
+	i *pebble.Iterator
+}
+
+type PebbleStagedProvingKeyIterator struct {
+	i *pebble.Iterator
+}
+
+type PebbleKeyBundleIterator struct {
+	i *pebble.Iterator
+}
+
+var pki = (*PebbleProvingKeyIterator)(nil)
+var spki = (*PebbleStagedProvingKeyIterator)(nil)
+var kbi = (*PebbleKeyBundleIterator)(nil)
+var _ Iterator[*protobufs.InclusionCommitment] = pki
+var _ Iterator[*protobufs.ProvingKeyAnnouncement] = spki
+var _ Iterator[*protobufs.InclusionCommitment] = kbi
+var _ KeyStore = (*PebbleKeyStore)(nil)
+
+func (p *PebbleProvingKeyIterator) First() bool {
+	return p.i.First()
+}
+
+func (p *PebbleProvingKeyIterator) Next() bool {
+	return p.i.Next()
+}
+
+func (p *PebbleProvingKeyIterator) Valid() bool {
+	return p.i.Valid()
+}
+
+func (p *PebbleProvingKeyIterator) Value() (
+	*protobufs.InclusionCommitment,
+	error,
+) {
+	if !p.i.Valid() {
+		return nil, ErrNotFound
+	}
+
+	value := p.i.Value()
+	frame := &protobufs.InclusionCommitment{}
+	if err := proto.Unmarshal(value, frame); err != nil {
+		return nil, errors.Wrap(
+			errors.Wrap(err, ErrInvalidData.Error()),
+			"get proving key iterator value",
+		)
+	}
+
+	return frame, nil
+}
+
+func (p *PebbleProvingKeyIterator) Close() error {
+	return errors.Wrap(p.i.Close(), "closing iterator")
+}
+
+func (p *PebbleStagedProvingKeyIterator) First() bool {
+	return p.i.First()
+}
+
+func (p *PebbleStagedProvingKeyIterator) Next() bool {
+	return p.i.Next()
+}
+
+func (p *PebbleStagedProvingKeyIterator) Valid() bool {
+	return p.i.Valid()
+}
+
+func (p *PebbleStagedProvingKeyIterator) Value() (
+	*protobufs.ProvingKeyAnnouncement,
+	error,
+) {
+	if !p.i.Valid() {
+		return nil, ErrNotFound
+	}
+
+	value := p.i.Value()
+	frame := &protobufs.ProvingKeyAnnouncement{}
+	if err := proto.Unmarshal(value, frame); err != nil {
+		return nil, errors.Wrap(
+			errors.Wrap(err, ErrInvalidData.Error()),
+			"get staged proving key iterator value",
+		)
+	}
+
+	return frame, nil
+}
+
+func (p *PebbleStagedProvingKeyIterator) Close() error {
+	return errors.Wrap(p.i.Close(), "closing iterator")
+}
+
+func (p *PebbleKeyBundleIterator) First() bool {
+	return p.i.First()
+}
+
+func (p *PebbleKeyBundleIterator) Next() bool {
+	return p.i.Next()
+}
+
+func (p *PebbleKeyBundleIterator) Valid() bool {
+	return p.i.Valid()
+}
+
+func (p *PebbleKeyBundleIterator) Value() (
+	*protobufs.InclusionCommitment,
+	error,
+) {
+	if !p.i.Valid() {
+		return nil, ErrNotFound
+	}
+
+	value := p.i.Value()
+	frame := &protobufs.InclusionCommitment{}
+	if err := proto.Unmarshal(value, frame); err != nil {
+		return nil, errors.Wrap(
+			errors.Wrap(err, ErrInvalidData.Error()),
+			"get key bundle iterator value",
+		)
+	}
+
+	return frame, nil
+}
+
+func (p *PebbleKeyBundleIterator) Close() error {
+	return errors.Wrap(p.i.Close(), "closing iterator")
+}
+
+func NewPebbleKeyStore(db *pebble.DB, logger *zap.Logger) *PebbleKeyStore {
+	return &PebbleKeyStore{
+		db,
+		logger,
+	}
+}
+
+const (
+	PROVING_KEY               = 0x01
+	PROVING_KEY_STAGED        = 0x02
+	KEY_BUNDLE                = 0x03
+	KEY_DATA                  = 0x00
+	KEY_BUNDLE_INDEX_EARLIEST = 0x10
+	KEY_BUNDLE_INDEX_LATEST   = 0x20
+)
+
+func provingKeyKey(provingKey []byte) []byte {
+	key := []byte{PROVING_KEY, KEY_DATA}
+	key = append(key, provingKey...)
+	return key
+}
+
+func stagedProvingKeyKey(provingKey []byte) []byte {
+	key := []byte{PROVING_KEY_STAGED, KEY_DATA}
+	key = append(key, provingKey...)
+	return key
+}
+
+func keyBundleKey(provingKey []byte, frameNumber uint64) []byte {
+	key := []byte{KEY_BUNDLE, KEY_DATA}
+	key = append(key, provingKey...)
+	key = binary.BigEndian.AppendUint64(key, frameNumber)
+	return key
+}
+
+func keyBundleLatestKey(provingKey []byte) []byte {
+	key := []byte{KEY_BUNDLE, KEY_BUNDLE_INDEX_LATEST}
+	key = append(key, provingKey...)
+	return key
+}
+
+func keyBundleEarliestKey(provingKey []byte) []byte {
+	key := []byte{KEY_BUNDLE, KEY_BUNDLE_INDEX_EARLIEST}
+	key = append(key, provingKey...)
+	return key
+}
+
+func (p *PebbleKeyStore) NewTransaction() (Transaction, error) {
+	return &PebbleTransaction{
+		b: p.db.NewBatch(),
+	}, nil
+}
+
+// Stages a proving key for later inclusion on proof of meaningful work.
+// Does not verify, upstream callers must verify.
+func (p *PebbleKeyStore) StageProvingKey(
+	provingKey *protobufs.ProvingKeyAnnouncement,
+) error {
+	data, err := proto.Marshal(provingKey)
+	if err != nil {
+		return errors.Wrap(err, "stage proving key")
+	}
+
+	err = p.db.Set(
+		stagedProvingKeyKey(provingKey.PublicKey()),
+		data,
+		&pebble.WriteOptions{
+			Sync: true,
+		},
+	)
+	if err != nil {
+		return errors.Wrap(err, "stage proving key")
+	}
+
+	return nil
+}
+
+// Includes a proving key with an inclusion commitment. If a proving key is
+// staged, promotes it by including it in the primary key store and deletes the
+// staged key.
+func (p *PebbleKeyStore) IncludeProvingKey(
+	inclusionCommitment *protobufs.InclusionCommitment,
+	txn Transaction,
+) error {
+	provingKey := &protobufs.ProvingKeyAnnouncement{}
+	if err := proto.Unmarshal(inclusionCommitment.Data, provingKey); err != nil {
+		return errors.Wrap(err, "include proving key")
+	}
+
+	if err := provingKey.Verify(); err != nil {
+		return errors.Wrap(err, "include proving key")
+	}
+
+	data, err := proto.Marshal(inclusionCommitment)
+	if err != nil {
+		return errors.Wrap(err, "include proving key")
+	}
+
+	txn.Set(
+		provingKeyKey(provingKey.PublicKey()),
+		data,
+	)
+
+	staged, closer, err := p.db.Get(stagedProvingKeyKey(provingKey.PublicKey()))
+	if err != nil && !errors.Is(err, ErrNotFound) {
+		return errors.Wrap(err, "include proving key")
+	}
+
+	if staged != nil {
+		if err := txn.Delete(
+			stagedProvingKeyKey(provingKey.PublicKey()),
+		); err != nil {
+			return errors.Wrap(err, "include proving key")
+		}
+	}
+	if err := closer.Close(); err != nil {
+		return errors.Wrap(err, "include proving key")
+	}
+
+	return nil
+}
+
+func (p *PebbleKeyStore) GetStagedProvingKey(
+	provingKey []byte,
+) (*protobufs.ProvingKeyAnnouncement, error) {
+	data, closer, err := p.db.Get(stagedProvingKeyKey(provingKey))
+	if err != nil {
+		if errors.Is(err, pebble.ErrNotFound) {
+			return nil, ErrNotFound
+		}
+
+		return nil, errors.Wrap(err, "get staged proving key")
+	}
+
+	stagedKey := &protobufs.ProvingKeyAnnouncement{}
+	if err = proto.Unmarshal(data, stagedKey); err != nil {
+		return nil, errors.Wrap(err, "get staged proving key")
+	}
+
+	if err := closer.Close(); err != nil {
+		return nil, errors.Wrap(err, "get staged proving key")
+	}
+
+	return stagedKey, nil
+}
+
+// Returns the latest key bundle for a given proving key.
+func (p *PebbleKeyStore) GetLatestKeyBundle(
+	provingKey []byte,
+) (*protobufs.InclusionCommitment, error) {
+	value, closer, err := p.db.Get(keyBundleLatestKey(provingKey))
+	if err != nil {
+		if errors.Is(err, pebble.ErrNotFound) {
+			return nil, ErrNotFound
+		}
+
+		return nil, errors.Wrap(err, "get latest key bundle")
+	}
+	frameNumber := binary.BigEndian.Uint64(value)
+
+	if err := closer.Close(); err != nil {
+		return nil, errors.Wrap(err, "get latest key bundle")
+	}
+
+	value, closer, err = p.db.Get(keyBundleKey(provingKey, frameNumber))
+	if err != nil {
+		if errors.Is(err, pebble.ErrNotFound) {
+			return nil, ErrNotFound
+		}
+
+		return nil, errors.Wrap(err, "get latest key bundle")
+	}
+
+	defer closer.Close()
+
+	announcement := &protobufs.InclusionCommitment{}
+	if err := proto.Unmarshal(value, announcement); err != nil {
+		return nil, errors.Wrap(
+			errors.Wrap(err, ErrInvalidData.Error()),
+			"get latest key bundle",
+		)
+	}
+
+	return announcement, nil
+}
+
+// Retrieves the specific key bundle included at a given frame number.
+func (p *PebbleKeyStore) GetKeyBundle(
+	provingKey []byte,
+	frameNumber uint64,
+) (*protobufs.InclusionCommitment, error) {
+	value, closer, err := p.db.Get(keyBundleKey(provingKey, frameNumber))
+	if err != nil {
+		if errors.Is(err, pebble.ErrNotFound) {
+			return nil, ErrNotFound
+		}
+
+		return nil, errors.Wrap(err, "get key bundle")
+	}
+
+	defer closer.Close()
+
+	announcement := &protobufs.InclusionCommitment{}
+	if err := proto.Unmarshal(value, announcement); err != nil {
+		return nil, errors.Wrap(
+			errors.Wrap(err, ErrInvalidData.Error()),
+			"get key bundle",
+		)
+	}
+
+	return announcement, nil
+}
+
+// Retrieves an included proving key, returns ErrNotFound if not present.
+func (p *PebbleKeyStore) GetProvingKey(
+	provingKey []byte,
+) (*protobufs.InclusionCommitment, error) {
+	value, closer, err := p.db.Get(provingKeyKey(provingKey))
+	if err != nil {
+		if errors.Is(err, pebble.ErrNotFound) {
+			return nil, ErrNotFound
+		}
+
+		return nil, errors.Wrap(err, "get proving key")
+	}
+
+	defer closer.Close()
+
+	announcement := &protobufs.InclusionCommitment{}
+	if err := proto.Unmarshal(value, announcement); err != nil {
+		return nil, errors.Wrap(
+			errors.Wrap(err, ErrInvalidData.Error()),
+			"get proving key",
+		)
+	}
+
+	return announcement, nil
+}
+
+// Inserts a key bundle with inclusion commitment. Does not verify, upstream
+// callers must perform the verification.
+func (p *PebbleKeyStore) PutKeyBundle(
+	provingKey []byte,
+	keyBundle *protobufs.InclusionCommitment,
+	txn Transaction,
+) error {
+	data, err := proto.Marshal(keyBundle)
+	if err != nil {
+		return errors.Wrap(
+			errors.Wrap(err, ErrInvalidData.Error()),
+			"put key bundle",
+		)
+	}
+
+	frameNumberBytes := make([]byte, 8)
+	binary.BigEndian.PutUint64(frameNumberBytes, keyBundle.FrameNumber)
+
+	if err = txn.Set(
+		keyBundleKey(provingKey, keyBundle.FrameNumber),
+		data,
+	); err != nil {
+		return errors.Wrap(err, "put key bundle")
+	}
+
+	_, closer, err := p.db.Get(keyBundleEarliestKey(provingKey))
+	if err != nil {
+		if !errors.Is(err, pebble.ErrNotFound) {
+			return errors.Wrap(err, "put key bundle")
+		}
+
+		if err = txn.Set(
+			keyBundleEarliestKey(provingKey),
+			frameNumberBytes,
+		); err != nil {
+			return errors.Wrap(err, "put key bundle")
+		}
+	}
+
+	if err == nil && closer != nil {
+		closer.Close()
+	}
+
+	if err = txn.Set(
+		keyBundleLatestKey(provingKey),
+		frameNumberBytes,
+	); err != nil {
+		return errors.Wrap(err, "put key bundle")
+	}
+
+	return nil
+}
+
+func (p *PebbleKeyStore) RangeProvingKeys() (*PebbleProvingKeyIterator, error) {
+	iter := p.db.NewIter(&pebble.IterOptions{
+		LowerBound: provingKeyKey([]byte{
+			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+			0x00,
+		}),
+		UpperBound: provingKeyKey([]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,
+			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,
+		}),
+	})
+
+	return &PebbleProvingKeyIterator{i: iter}, nil
+}
+
+func (p *PebbleKeyStore) RangeStagedProvingKeys() (
+	*PebbleStagedProvingKeyIterator,
+	error,
+) {
+	iter := p.db.NewIter(&pebble.IterOptions{
+		LowerBound: stagedProvingKeyKey([]byte{
+			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+			0x00,
+		}),
+		UpperBound: stagedProvingKeyKey([]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,
+			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,
+		}),
+	})
+
+	return &PebbleStagedProvingKeyIterator{i: iter}, nil
+}
+
+func (p *PebbleKeyStore) RangeKeyBundleKeys(provingKey []byte) (
+	*PebbleKeyBundleIterator,
+	error,
+) {
+	iter := p.db.NewIter(&pebble.IterOptions{
+		LowerBound: keyBundleKey(provingKey, 0),
+		UpperBound: keyBundleKey(provingKey, 0xffffffffffffffff),
+	})
+
+	return &PebbleKeyBundleIterator{i: iter}, nil
+}

node/store/pebble.go

@@ -0,0 +1,55 @@
+package store
+
+import (
+	"github.com/cockroachdb/pebble"
+	"source.quilibrium.com/quilibrium/monorepo/node/config"
+)
+
+func NewPebbleDB(config *config.DBConfig) *pebble.DB {
+	db, err := pebble.Open(config.Path, &pebble.Options{})
+	if err != nil {
+		panic(err)
+	}
+
+	return db
+}
+
+type Transaction interface {
+	Set(key []byte, value []byte) error
+	Commit() error
+	Delete(key []byte) error
+}
+
+type PebbleTransaction struct {
+	b *pebble.Batch
+}
+
+func (t *PebbleTransaction) Set(key []byte, value []byte) error {
+	return t.b.Set(key, value, &pebble.WriteOptions{Sync: true})
+}
+
+func (t *PebbleTransaction) Commit() error {
+	return t.b.Commit(&pebble.WriteOptions{Sync: true})
+}
+
+func (t *PebbleTransaction) Delete(key []byte) error {
+	return t.b.Delete(key, &pebble.WriteOptions{Sync: true})
+}
+
+var _ Transaction = (*PebbleTransaction)(nil)
+
+func rightAlign(data []byte, size int) []byte {
+	l := len(data)
+
+	if l == size {
+		return data
+	}
+
+	if l > size {
+		return data[l-size:]
+	}
+
+	pad := make([]byte, size)
+	copy(pad[size-l:], data)
+	return pad
+}