pkg/beaconclient/beaconclient.go

@@ -15,6 +15,7 @@ var (
 	bcFinalizedTopicEndpoint = "/eth/v1/events?topics=finalized_checkpoint" // Endpoint used to subscribe to the head of the chain
 	bcBlockQueryEndpoint     = "/eth/v2/beacon/blocks/"                     // Endpoint to query individual Blocks
 	bcStateQueryEndpoint     = "/eth/v2/debug/beacon/states/"               // Endpoint to query individual States
+	bcSlotsPerEpoch          = 32                                           // Number of slots in a single Epoch
 )
 
 // A struct that capture the Beacon Server that the Beacon Client will be interacting with and querying.

pkg/beaconclient/capturehead.go

@@ -5,7 +5,6 @@ package beaconclient
 import (
 	"time"
 
-	"github.com/ferranbt/fastssz/spectests"
 	log "github.com/sirupsen/logrus"
 	"github.com/vulcanize/ipld-ethcl-indexer/pkg/loghelper"
 )
@@ -21,34 +20,34 @@ func (bc *BeaconClient) CaptureHead() {
 }
 
 // A temporary helper function to see the output of beacon block and states.
-func (bc *BeaconClient) tempHelper() {
-	slot := "3200"
-	blockEndpoint := bc.ServerEndpoint + bcBlockQueryEndpoint + slot
-	stateEndpoint := bc.ServerEndpoint + bcStateQueryEndpoint + slot
-	// Query
-	log.Info("Get")
-	blockSsz, _ := querySsz(blockEndpoint, slot)
-	stateSsz, _ := querySsz(stateEndpoint, slot)
-	// Transform
-	log.Info("Tranform")
-	stateObj := new(spectests.BeaconState)
-	err := stateObj.UnmarshalSSZ(stateSsz)
-	if err != nil {
-		loghelper.LogSlotError(slot, err).Error("Unable to unmarshal the SSZ response from the Beacon Node Successfully!")
-	}
-
-	blockObj := new(spectests.SignedBeaconBlock)
-	err = blockObj.UnmarshalSSZ(blockSsz)
-	if err != nil {
-		loghelper.LogSlotError(slot, err).Error("Unable to unmarshal the SSZ response from the Beacon Node Successfully!")
-	}
-
-	// Check
-	log.Info("Check")
-	log.Info("State Slot: ", stateObj.Slot)
-	log.Info("Block Slot: ", blockObj.Block.Slot)
-}
-
+//func (bc *BeaconClient) tempHelper() {
+//	slot := "3200"
+//	blockEndpoint := bc.ServerEndpoint + bcBlockQueryEndpoint + slot
+//	stateEndpoint := bc.ServerEndpoint + bcStateQueryEndpoint + slot
+//	// Query
+//	log.Info("Get")
+//	blockSsz, _ := querySsz(blockEndpoint, slot)
+//	stateSsz, _ := querySsz(stateEndpoint, slot)
+//	// Transform
+//	log.Info("Tranform")
+//	stateObj := new(spectests.BeaconState)
+//	err := stateObj.UnmarshalSSZ(stateSsz)
+//	if err != nil {
+//		loghelper.LogSlotError(slot, err).Error("Unable to unmarshal the SSZ response from the Beacon Node Successfully!")
+//	}
+//
+//	blockObj := new(spectests.SignedBeaconBlock)
+//	err = blockObj.UnmarshalSSZ(blockSsz)
+//	if err != nil {
+//		loghelper.LogSlotError(slot, err).Error("Unable to unmarshal the SSZ response from the Beacon Node Successfully!")
+//	}
+//
+//	// Check
+//	log.Info("Check")
+//	log.Info("State Slot: ", stateObj.Slot)
+//	log.Info("Block Slot: ", blockObj.Block.Slot)
+//}
+//
 // Stop the head tracking service.
 func (bc *BeaconClient) StopHeadTracking() error {
 	log.Info("We are going to stop tracking the head of chain because of the shutdown signal.")

pkg/beaconclient/databasewrite.go

@@ -0,0 +1,13 @@
+package beaconclient
+
+import "github.com/vulcanize/ipld-ethcl-indexer/pkg/database/sql"
+
+type DatabaseWriter struct {
+	Db                  sql.Database
+	DbSlots             *DbSlots
+	DbSignedBeaconBlock *DbSignedBeaconBlock
+	DbBeaconState       *DbBeaconState
+}
+
+// Write functions to write each all together...
+// Should I do one atomic write?

pkg/beaconclient/models.go

@@ -44,7 +44,7 @@ type DbSlots struct {
 	Slot      *big.Int // The slot.
 	BlockRoot string   // The block root
 	StateRoot string   // The state root
-	status    string   // The status, it can be proposed | forked | missed.
+	Status    string   // The status, it can be proposed | forked | missed.
 }
 
 // A struct to capture whats being written to ethcl.signed_beacon_block table.
@@ -52,12 +52,13 @@ type DbSignedBeaconBlock struct {
 	Slot        *big.Int // The slot.
 	BlockRoot   string   // The block root
 	ParentBlock string   // The parent block root.
-	mh_key      string   // The ipld multihash key.
+	MhKey       string   // The ipld multihash key.
 
 }
 
+// A struct to capture whats being written to ethcl.beacon_state table.
 type DbBeaconState struct {
 	Slot      *big.Int // The slot.
 	StateRoot string   // The state root
-	mh_key    string   // The ipld multihash key.
+	MhKey     string   // The ipld multihash key.
 }

pkg/beaconclient/processevents.go

@@ -8,6 +8,7 @@ import (
 	"strconv"
 
 	log "github.com/sirupsen/logrus"
+	"github.com/vulcanize/ipld-ethcl-indexer/pkg/loghelper"
 )
 
 // This function will perform the necessary steps to handle a reorg.
@@ -37,19 +38,21 @@ func (bc *BeaconClient) handleHead() {
 	for {
 		head := <-bc.HeadTracking.ProcessCh
 		// Process all the work here.
-
-		// Update the previous block if its the first message.
-		if bc.PreviousSlot == 0 && bc.PreviousBlockRoot == "" {
-			var err error
-			bc.PreviousSlot, err = strconv.Atoi(head.Slot)
-			if err != nil {
-				bc.HeadTracking.ErrorCh <- &SseError{
-					err: fmt.Errorf("Unable to turn the slot from string to int: %s", head.Slot),
-				}
+		slot, err := strconv.Atoi(head.Slot)
+		if err != nil {
+			bc.HeadTracking.ErrorCh <- &SseError{
+				err: fmt.Errorf("Unable to turn the slot from string to int: %s", head.Slot),
 			}
-			bc.PreviousBlockRoot = head.Block
+		}
+		err = handleHeadSlot(bc.ServerEndpoint, slot, head.Block, head.State, uint64(bc.PreviousSlot), bc.PreviousBlockRoot)
+		if err != nil {
+			loghelper.LogSlotError(head.Slot, err)
 		}
 		log.WithFields(log.Fields{"head": head}).Debug("Received a new head event.")
+
+		// Update the previous block
+		bc.PreviousSlot = slot
+		bc.PreviousBlockRoot = head.Block
 	}
 
 }

pkg/beaconclient/processslot.go

@@ -7,6 +7,9 @@ package beaconclient
 import (
 	"encoding/hex"
 	"fmt"
+	"math/big"
+	"strconv"
+	"strings"
 
 	"github.com/ferranbt/fastssz/spectests"
 	log "github.com/sirupsen/logrus"
@@ -14,119 +17,160 @@ import (
 )
 
 var (
-	SlotUnmarshalError       = "Unable to properly unmarshal the Slot field in the SignedBeaconBlock."
+	SlotUnmarshalError = func(obj string) string {
+		return fmt.Sprintf("Unable to properly unmarshal the Slot field in the %s.", obj)
+	}
+
+	//SlotUnmarshalError       = "Unable to properly unmarshal the Slot field in the SignedBeaconBlock."
 	ParentRootUnmarshalError = "Unable to properly unmarshal the ParentRoot field in the SignedBeaconBlock."
-	MissingIdentifiedError   = "Can't Query state without a set slot or block_root"
+	MissingIdentifiedError   = "Can't query state without a set slot or block_root"
 )
 
 type ProcessSlot struct {
-	Slot                  string                       // The slot number.
+	Slot                  int                          // The slot number.
+	Epoch                 int                          // The epoch number.
 	BlockRoot             string                       // The hex encoded string of the BlockRoot.
 	StateRoot             string                       // The hex encoded string of the StateRoot.
 	ParentBlockRoot       string                       // The hex encoded string of the parent block.
+	Status                string                       // The status of the block
+	HeadOrHistoric        string                       // Is this the head or a historic slot. This is critical when trying to analyze errors and missed slots.
 	SszSignedBeaconBlock  []byte                       // The entire SSZ encoded SignedBeaconBlock
 	SszBeaconState        []byte                       // The entire SSZ encoded BeaconState
 	FullBeaconState       *spectests.BeaconState       // The unmarshaled BeaconState object, the unmarshalling could have errors.
 	FullSignedBeaconBlock *spectests.SignedBeaconBlock // The unmarshaled BeaconState object, the unmarshalling could have errors.
 }
 
-// This function will do all the work to process the slot at head.
-func processHeadSlot(baseEndpoint string, slot string, blockRoot string, stateRoot string, parentBlockRoot string, previousSlot uint64, previousBlockRoot string) error {
-	pc := &ProcessSlot{
-		Slot:            slot,
-		BlockRoot:       blockRoot,
-		StateRoot:       stateRoot,
-		ParentBlockRoot: parentBlockRoot,
+// This function will do all the work to process the slot and write it to the DB.
+func handleFullSlot(serverAddress string, slot int, blockRoot string, stateRoot string, previousSlot uint64, previousBlockRoot string, headOrHistoric string) error {
+	headOrHistoric = strings.ToLower(headOrHistoric)
+	if headOrHistoric != "head" && headOrHistoric != "historic" {
+		return fmt.Errorf("headOrBatch must be either historic or head!")
 	}
-	err := pc.getSignedBeaconBlock(baseEndpoint)
+	ps := &ProcessSlot{
+		Slot:           slot,
+		BlockRoot:      blockRoot,
+		StateRoot:      stateRoot,
+		HeadOrHistoric: headOrHistoric,
+	}
+
+	// Get the SignedBeaconBlock.
+	err := ps.getSignedBeaconBlock(serverAddress)
 	if err != nil {
 		return err
 	}
 
-	err = pc.getBeaconState(baseEndpoint)
+	// Get the BeaconState.
+	err = ps.getBeaconState(serverAddress)
 	if err != nil {
 		return err
 	}
 
 	// Handle any reorgs or skipped slots.
-	if previousSlot != 0 && previousBlockRoot != "" {
-		pc.checkPreviousSlot(previousSlot, previousBlockRoot)
+	if ps.HeadOrHistoric == "head" {
+		if previousSlot != 0 && previousBlockRoot != "" {
+			ps.checkPreviousSlot(previousSlot, previousBlockRoot)
+		}
 	}
 
 	// Get this object ready to write
+	ps.createWriteObjects()
 
 	// Write the object to the DB.
 
 	return nil
 }
 
+// Handle a slot that is at head. A wrapper function for calling `handleFullSlot`.
+func handleHeadSlot(serverAddress string, slot int, blockRoot string, stateRoot string, previousSlot uint64, previousBlockRoot string) error {
+	log.Debug("handleHeadSlot")
+	return handleFullSlot(serverAddress, slot, blockRoot, stateRoot, previousSlot, previousBlockRoot, "head")
+}
+
+// Handle a historic slot. A wrapper function for calling `handleFullSlot`.
+func handleHistoricSlot(serverAddress string, slot int) error {
+	return handleFullSlot(serverAddress, slot, "", "", 0, "", "historic")
+}
+
 // Update the SszSignedBeaconBlock and FullSignedBeaconBlock object with their respective values.
-func (ps *ProcessSlot) getSignedBeaconBlock(baseEndpoint string) error {
+func (ps *ProcessSlot) getSignedBeaconBlock(serverAddress string) error {
 	var blockIdentifier string // Used to query the block
 	if ps.BlockRoot != "" {
 		blockIdentifier = ps.BlockRoot
-	} else if ps.Slot != "" {
-		blockIdentifier = ps.Slot
+	} else if ps.Slot != 0 {
+		blockIdentifier = strconv.Itoa(ps.Slot)
 	} else {
 		log.Error(MissingIdentifiedError)
 		return fmt.Errorf(MissingIdentifiedError)
 	}
-	blockEndpoint := baseEndpoint + blockIdentifier
-	ps.SszSignedBeaconBlock, _ = querySsz(blockEndpoint, ps.Slot)
+	blockEndpoint := serverAddress + bcBlockQueryEndpoint + blockIdentifier
+	var err error
+	var rc int
+	ps.SszSignedBeaconBlock, rc, err = querySsz(blockEndpoint, strconv.Itoa(ps.Slot))
+	if err != nil {
+		loghelper.LogSlotError(strconv.Itoa(ps.Slot), err).Error("Unable to properly query the slot.")
+		return err
+	}
+
+	if rc != 200 {
+		ps.checkMissedSlot()
+	}
 
 	ps.FullSignedBeaconBlock = new(spectests.SignedBeaconBlock)
-	err := ps.FullSignedBeaconBlock.UnmarshalSSZ(ps.SszSignedBeaconBlock)
+	err = ps.FullSignedBeaconBlock.UnmarshalSSZ(ps.SszSignedBeaconBlock)
 
 	if err != nil {
 		if ps.FullSignedBeaconBlock.Block.Slot == 0 {
-			loghelper.LogSlotError(ps.Slot, err).Error(SlotUnmarshalError)
-			return fmt.Errorf(SlotUnmarshalError)
+			loghelper.LogSlotError(strconv.Itoa(ps.Slot), err).Error(SlotUnmarshalError("SignedBeaconBlock"))
+			return fmt.Errorf(SlotUnmarshalError("SignedBeaconBlock"))
 		} else if ps.FullSignedBeaconBlock.Block.ParentRoot == nil {
-			loghelper.LogSlotError(ps.Slot, err).Error(ParentRootUnmarshalError)
+			loghelper.LogSlotError(strconv.Itoa(ps.Slot), err).Error(ParentRootUnmarshalError)
 			return fmt.Errorf(ParentRootUnmarshalError)
 		}
 	}
+	ps.ParentBlockRoot = "0x" + hex.EncodeToString(ps.FullSignedBeaconBlock.Block.ParentRoot)
 	return nil
 }
 
 // Update the SszBeaconState and FullBeaconState object with their respective values.
-func (ps *ProcessSlot) getBeaconState(baseEndpoint string) error {
+func (ps *ProcessSlot) getBeaconState(serverEndpoint string) error {
 	var stateIdentifier string // Used to query the state
 	if ps.StateRoot != "" {
-		stateIdentifier = ps.BlockRoot
-	} else if ps.Slot != "" {
-		stateIdentifier = ps.Slot
+		stateIdentifier = ps.StateRoot
+	} else if ps.Slot != 0 {
+		stateIdentifier = strconv.Itoa(ps.Slot)
 	} else {
 		log.Error(MissingIdentifiedError)
 		return fmt.Errorf(MissingIdentifiedError)
 	}
-	stateEndpoint := baseEndpoint + stateIdentifier
-	ps.SszBeaconState, _ = querySsz(stateEndpoint, ps.Slot)
+	stateEndpoint := serverEndpoint + bcStateQueryEndpoint + stateIdentifier
+	ps.SszBeaconState, _, _ = querySsz(stateEndpoint, strconv.Itoa(ps.Slot))
 
 	ps.FullBeaconState = new(spectests.BeaconState)
-	err := ps.FullSignedBeaconBlock.UnmarshalSSZ(ps.SszBeaconState)
+	err := ps.FullBeaconState.UnmarshalSSZ(ps.SszBeaconState)
 
 	if err != nil {
 		if ps.FullBeaconState.Slot == 0 {
-			loghelper.LogSlotError(ps.Slot, err).Error(SlotUnmarshalError)
-			return fmt.Errorf(SlotUnmarshalError)
+			loghelper.LogSlotError(strconv.Itoa(ps.Slot), err).Error(SlotUnmarshalError("BeaconState"))
+			return fmt.Errorf(SlotUnmarshalError("BeaconState"))
 		}
 	}
 	return nil
 }
 
+// Check to make sure that the previous block we processed is the parent of the current block.
 func (ps *ProcessSlot) checkPreviousSlot(previousSlot uint64, previousBlockRoot string) {
 	if previousSlot == ps.FullBeaconState.Slot {
 		log.WithFields(log.Fields{
 			"slot": ps.FullBeaconState.Slot,
 			"fork": true,
 		}).Warn("A fork occurred! The previous slot and current slot match.")
-		// Handle Forks
+		// mark old slot as forked.
 	} else if previousSlot-1 != ps.FullBeaconState.Slot {
 		log.WithFields(log.Fields{
 			"previousSlot": previousSlot,
 			"currentSlot":  ps.FullBeaconState.Slot,
 		}).Error("We skipped a few slots.")
+		// Check to see if the slot was skipped.
 		// Call our batch processing function.
 	} else if previousBlockRoot != "0x"+hex.EncodeToString(ps.FullSignedBeaconBlock.Block.ParentRoot) {
 		log.WithFields(log.Fields{
@@ -134,5 +178,106 @@ func (ps *ProcessSlot) checkPreviousSlot(previousSlot uint64, previousBlockRoot
 			"currentBlockParent": ps.FullSignedBeaconBlock.Block.ParentRoot,
 		}).Error("The previousBlockRoot does not match the current blocks parent, an unprocessed fork might have occurred.")
 		// Handle Forks
+		// Mark the previous slot in the DB as a fork.
+		// Continue with this slot.
 	}
 }
+
+// Add logic for checking a missed Slot
+// IF the state is present but block is not, then it was skipped???
+// If the state and block are both absent, then the block might be missing??
+// IF state is absent but block is not, there might be an issue with the LH client.
+// Check the previous and following slot?
+// Check if head or historic.
+
+// 1. BeaconBlock is 404.
+// 2. check heck /lighthouse/database/info to make sure the oldest_block_slot == 0  and anchor == null. This indicates that I don't have any gaps in the DB.
+// 3. I query BeaconState for slot X, and get a BeaconState.
+// 4. Although for good measure you should also check that the head is at a slot >= X using something like /eth/v1/node/syncing/ or /eth/v1/beacon/headers/head
+func (ps *ProcessSlot) checkMissedSlot() {
+
+}
+
+// Transforms all the raw data into DB models that can be written to the DB.
+func (ps *ProcessSlot) createWriteObjects() {
+	var (
+		stateRoot string
+		blockRoot string
+		status    string
+	)
+
+	if ps.StateRoot != "" {
+		stateRoot = ps.StateRoot
+	} else {
+		stateRoot = hex.EncodeToString(ps.FullSignedBeaconBlock.Block.StateRoot)
+	}
+
+	if ps.BlockRoot != "" {
+		blockRoot = ps.BlockRoot
+	} else {
+		// wait for response from Prysm.
+		// get the blockroot
+	}
+
+	if ps.Status != "" {
+		status = ps.StateRoot
+	} else {
+		status = "proposed"
+	}
+	// Function to write slots table
+	ps.prepareSlotsModel(stateRoot, blockRoot, status)
+
+	// function to write block
+	ps.prepareSignedBeaconBlockModel(blockRoot)
+
+	// function to write state
+	ps.prepareBeaconStateModel(stateRoot)
+}
+
+// Create the model for the ethcl.slots table
+func (ps *ProcessSlot) prepareSlotsModel(stateRoot string, blockRoot string, status string) *DbSlots {
+	dbSlots := &DbSlots{
+		Epoch:     calculateEpoch(ps.Slot, bcSlotsPerEpoch),
+		Slot:      big.NewInt(int64(ps.Slot)),
+		StateRoot: stateRoot,
+		BlockRoot: blockRoot,
+		Status:    status,
+	}
+	log.Debug("DbSlots: ", dbSlots)
+	return dbSlots
+
+}
+
+// Create the model for the ethcl.signed_beacon_block table.
+func (ps *ProcessSlot) prepareSignedBeaconBlockModel(blockRoot string) *DbSignedBeaconBlock {
+	dbSignedBeaconBlock := &DbSignedBeaconBlock{
+		Slot:        big.NewInt(int64(ps.Slot)),
+		BlockRoot:   blockRoot,
+		ParentBlock: ps.ParentBlockRoot,
+		MhKey:       calculateMhKey(),
+	}
+	log.Debug("dbSignedBeaconBlock: ", dbSignedBeaconBlock)
+	return dbSignedBeaconBlock
+}
+
+// Create the model for the ethcl.beacon_state table.
+func (ps *ProcessSlot) prepareBeaconStateModel(stateRoot string) *DbBeaconState {
+	dbBeaconState := &DbBeaconState{
+		Slot:      big.NewInt(int64(ps.Slot)),
+		StateRoot: stateRoot,
+		MhKey:     calculateMhKey(),
+	}
+
+	log.Debug("dbBeaconState: ", dbBeaconState)
+	return dbBeaconState
+}
+
+// A quick helper function to calculate the epoch.
+func calculateEpoch(slot int, slotPerEpoch int) *big.Int {
+	epoch := slot / slotPerEpoch
+	return big.NewInt(int64(epoch))
+}
+
+func calculateMhKey() string {
+	return ""
+}

pkg/beaconclient/queryserver.go

@@ -76,26 +76,26 @@ import (
 // }
 
 // A helper function to query endpoints that utilize slots.
-func querySsz(endpoint string, slot string) ([]byte, error) {
+func querySsz(endpoint string, slot string) ([]byte, int, error) {
 	log.WithFields(log.Fields{"endpoint": endpoint}).Info("Querying endpoint")
 	client := &http.Client{}
 	req, err := http.NewRequest("GET", endpoint, nil)
 	if err != nil {
 		loghelper.LogSlotError(slot, err).Error("Unable to create a request!")
-		return nil, fmt.Errorf("Unable to create a request!: %s", err.Error())
+		return nil, 0, fmt.Errorf("Unable to create a request!: %s", err.Error())
 	}
-	// Not set correctly
 	req.Header.Set("Accept", "application/octet-stream")
 	response, err := client.Do(req)
 	if err != nil {
 		loghelper.LogSlotError(slot, err).Error("Unable to query Beacon Node!")
-		return nil, fmt.Errorf("Unable to query Beacon Node: %s", err.Error())
+		return nil, 0, fmt.Errorf("Unable to query Beacon Node: %s", err.Error())
 	}
 	defer response.Body.Close()
+	rc := response.StatusCode
 	body, err := ioutil.ReadAll(response.Body)
 	if err != nil {
 		loghelper.LogSlotError(slot, err).Error("Unable to turn response into a []bytes array!")
-		return nil, fmt.Errorf("Unable to turn response into a []bytes array!: %s", err.Error())
+		return nil, rc, fmt.Errorf("Unable to turn response into a []bytes array!: %s", err.Error())
 	}
-	return body, nil
+	return body, rc, nil
 }