cmd/capture.go

@@ -21,6 +21,7 @@ var (
 	dbPort                 int
 	bcAddress              string
 	bcPort                 int
+	bcConnectionProtocol   string
 	maxWaitSecondsShutdown time.Duration = time.Duration(5) * time.Second
 )
 
@@ -62,6 +63,7 @@ func init() {
 	//// Beacon Client Specific
 	captureCmd.PersistentFlags().StringVarP(&bcAddress, "bc.address", "l", "", "Address to connect to beacon node (required if username is set)")
 	captureCmd.PersistentFlags().IntVarP(&bcPort, "bc.port", "r", 0, "Port to connect to beacon node (required if username is set)")
+	captureCmd.PersistentFlags().StringVarP(&bcConnectionProtocol, "bc.connectionProtocol", "", "http", "protocol for connecting to the beacon node.")
 	err = captureCmd.MarkPersistentFlagRequired("bc.address")
 	exitErr(err)
 	err = captureCmd.MarkPersistentFlagRequired("bc.port")
@@ -87,6 +89,8 @@ func init() {
 	exitErr(err)
 	err = viper.BindPFlag("bc.port", captureCmd.PersistentFlags().Lookup("bc.port"))
 	exitErr(err)
+	err = viper.BindPFlag("bc.connectionProtocol", captureCmd.PersistentFlags().Lookup("bc.connectionProtocol"))
+	exitErr(err)
 	// Here you will define your flags and configuration settings.
 
 }

cmd/head.go

@@ -31,7 +31,7 @@ func startHeadTracking() {
 	log.Info("Starting the application in head tracking mode.")
 	ctx := context.Background()
 
-	BC, DB, err := boot.BootApplicationWithRetry(ctx, dbAddress, dbPort, dbName, dbUsername, dbPassword, dbDriver, bcAddress, bcPort)
+	BC, DB, err := boot.BootApplicationWithRetry(ctx, dbAddress, dbPort, dbName, dbUsername, dbPassword, dbDriver, bcAddress, bcPort, bcConnectionProtocol)
 	if err != nil {
 		loghelper.LogError(err).Error("Unable to Start application")
 	}

go.mod

@@ -19,6 +19,7 @@ require (
 	github.com/jackc/puddle v1.2.1 // indirect
 	github.com/kr/text v0.2.0 // indirect
 	github.com/lib/pq v1.10.4 // indirect
+	github.com/minio/sha256-simd v0.1.1 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	golang.org/x/crypto v0.0.0-20220411220226-7b82a4e95df4 // indirect
 	golang.org/x/net v0.0.0-20220412020605-290c469a71a5 // indirect
@@ -27,6 +28,7 @@ require (
 )
 
 require (
+	github.com/ferranbt/fastssz v0.0.0-20220303160658-88bb965b6747
 	github.com/fsnotify/fsnotify v1.5.1 // indirect
 	github.com/georgysavva/scany v0.3.0
 	github.com/hashicorp/hcl v1.0.0 // indirect

go.sum

@@ -65,6 +65,8 @@ github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1m
 github.com/envoyproxy/go-control-plane v0.9.7/go.mod h1:cwu0lG7PUMfa9snN8LXBig5ynNVH9qI8YYLbd1fK2po=
 github.com/envoyproxy/go-control-plane v0.9.9-0.20201210154907-fd9021fe5dad/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
+github.com/ferranbt/fastssz v0.0.0-20220303160658-88bb965b6747 h1:K2Bt7NSX8x/5MD2RiO7cPLy21dBgnQ84r9uR0QYoHrE=
+github.com/ferranbt/fastssz v0.0.0-20220303160658-88bb965b6747/go.mod h1:S8yiDeAXy8f88W4Ul+0dBMPx49S05byYbmZD6Uv94K4=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
 github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
 github.com/fsnotify/fsnotify v1.5.1 h1:mZcQUHVQUQWoPXXtuf9yuEXKudkV2sx1E06UadKWpgI=
@@ -112,6 +114,8 @@ github.com/golang/protobuf v1.4.3/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw
 github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
 github.com/golang/protobuf v1.5.2 h1:ROPKBNFfQgOUMifHyP+KYbvpjbdoFNs+aK7DXlji0Tw=
 github.com/golang/protobuf v1.5.2/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
+github.com/golang/snappy v0.0.3 h1:fHPg5GQYlCeLIPB9BZqMVR5nR9A+IM5zcgeTdjMYmLA=
+github.com/golang/snappy v0.0.3/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
 github.com/google/btree v0.0.0-20180813153112-4030bb1f1f0c/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
 github.com/google/btree v1.0.0/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
@@ -251,6 +255,9 @@ github.com/mattn/go-isatty v0.0.8/go.mod h1:Iq45c/XA43vh69/j3iqttzPXn0bhXyGjM0Hd
 github.com/mattn/go-isatty v0.0.9/go.mod h1:YNRxwqDuOph6SZLI9vUUz6OYw3QyUt7WiY2yME+cCiQ=
 github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
 github.com/mattn/go-sqlite3 v1.14.6/go.mod h1:NyWgC/yNuGj7Q9rpYnZvas74GogHl5/Z4A/KQRfk6bU=
+github.com/minio/sha256-simd v0.1.1 h1:5QHSlgo3nt5yKOJrC7W8w7X+NFl8cMPZm96iu8kKUJU=
+github.com/minio/sha256-simd v0.1.1/go.mod h1:B5e1o+1/KgNmWrSQK08Y6Z1Vb5pwIktudl0J58iy0KM=
+github.com/mitchellh/mapstructure v1.3.2/go.mod h1:bFUtVrKA4DC2yAKiSyO/QUcy7e+RRV2QTWOzhPopBRo=
 github.com/mitchellh/mapstructure v1.4.3 h1:OVowDSCllw/YjdLkam3/sm7wEtOy59d8ndGgCcyj8cs=
 github.com/mitchellh/mapstructure v1.4.3/go.mod h1:bFUtVrKA4DC2yAKiSyO/QUcy7e+RRV2QTWOzhPopBRo=
 github.com/nxadm/tail v1.4.4/go.mod h1:kenIhsEOeOJmVchQTgglprH7qJGnHDVpk1VPCcaMI8A=

internal/boot/boot.go

@@ -56,11 +56,11 @@ func SetupPostgresDb(dbHostname string, dbPort int, dbName string, dbUsername st
 //
 // 2. Connect to the database.
 //
-func BootApplication(ctx context.Context, dbHostname string, dbPort int, dbName string, dbUsername string, dbPassword string, driverName string, bcAddress string, bcPort int) (*beaconclient.BeaconClient, sql.Database, error) {
+func BootApplication(ctx context.Context, dbHostname string, dbPort int, dbName string, dbUsername string, dbPassword string, driverName string, bcAddress string, bcPort int, bcConnectionProtocol string) (*beaconclient.BeaconClient, sql.Database, error) {
 	log.Info("Booting the Application")
 
 	log.Debug("Creating the Beacon Client")
-	BC = beaconclient.CreateBeaconClient(ctx, bcAddress, bcPort)
+	BC = beaconclient.CreateBeaconClient(ctx, bcConnectionProtocol, bcAddress, bcPort)
 
 	log.Debug("Checking Beacon Client")
 	err := BC.CheckBeaconClient()
@@ -77,10 +77,10 @@ func BootApplication(ctx context.Context, dbHostname string, dbPort int, dbName
 }
 
 // Add retry logic to ensure that we are give the Beacon Client and the DB time to start.
-func BootApplicationWithRetry(ctx context.Context, dbHostname string, dbPort int, dbName string, dbUsername string, dbPassword string, driverName string, bcAddress string, bcPort int) (*beaconclient.BeaconClient, sql.Database, error) {
+func BootApplicationWithRetry(ctx context.Context, dbHostname string, dbPort int, dbName string, dbUsername string, dbPassword string, driverName string, bcAddress string, bcPort int, bcConnectionProtocol string) (*beaconclient.BeaconClient, sql.Database, error) {
 	var err error
 	for i := 0; i < maxRetry; i++ {
-		BC, DB, err = BootApplication(ctx, dbHostname, dbPort, dbName, dbUsername, dbPassword, driverName, bcAddress, bcPort)
+		BC, DB, err = BootApplication(ctx, dbHostname, dbPort, dbName, dbUsername, dbPassword, driverName, bcAddress, bcPort, bcConnectionProtocol)
 		if err != nil {
 			log.WithFields(log.Fields{
 				"retryNumber": i,

internal/boot/boot_test.go

@@ -18,30 +18,31 @@ var _ = Describe("Boot", func() {
 		dbDriver             string = "PGX"
 		bcAddress            string = "localhost"
 		bcPort               int    = 5052
+		bcConnectionProtocol string = "http"
 	)
 	Describe("Booting the application", Label("integration"), func() {
 		Context("When the DB and BC are both up and running", func() {
 			It("Should connect successfully", func() {
-				_, db, err := boot.BootApplicationWithRetry(context.Background(), dbAddress, dbPort, dbName, dbUsername, dbPassword, dbDriver, bcAddress, bcPort)
+				_, db, err := boot.BootApplicationWithRetry(context.Background(), dbAddress, dbPort, dbName, dbUsername, dbPassword, dbDriver, bcAddress, bcPort, bcConnectionProtocol)
 				defer db.Close()
 				Expect(err).To(BeNil())
 			})
 		})
 		Context("When the DB is running but not the BC", func() {
 			It("Should not connect successfully", func() {
-				_, _, err := boot.BootApplication(context.Background(), dbAddress, dbPort, dbName, dbUsername, dbPassword, dbDriver, "hi", 100)
+				_, _, err := boot.BootApplication(context.Background(), dbAddress, dbPort, dbName, dbUsername, dbPassword, dbDriver, "hi", 100, bcConnectionProtocol)
 				Expect(err).ToNot(BeNil())
 			})
 		})
 		Context("When the BC is running but not the DB", func() {
 			It("Should not connect successfully", func() {
-				_, _, err := boot.BootApplication(context.Background(), "hi", 10, dbName, dbUsername, dbPassword, dbDriver, bcAddress, bcPort)
+				_, _, err := boot.BootApplication(context.Background(), "hi", 10, dbName, dbUsername, dbPassword, dbDriver, bcAddress, bcPort, bcConnectionProtocol)
 				Expect(err).ToNot(BeNil())
 			})
 		})
 		Context("When neither the BC or DB are running", func() {
 			It("Should not connect successfully", func() {
-				_, _, err := boot.BootApplication(context.Background(), "hi", 10, dbName, dbUsername, dbPassword, dbDriver, "hi", 100)
+				_, _, err := boot.BootApplication(context.Background(), "hi", 10, dbName, dbUsername, dbPassword, dbDriver, "hi", 100, bcConnectionProtocol)
 				Expect(err).ToNot(BeNil())
 			})
 		})

pkg/beaconclient/beaconclient.go

@@ -13,14 +13,14 @@ var (
 	bcHeadTopicEndpoint      = "/eth/v1/events?topics=head"                 // Endpoint used to subscribe to the head of the chain
 	bcReorgTopicEndpoint     = "/eth/v1/events?topics=chain_reorg"          // Endpoint used to subscribe to the head of the chain
 	bcFinalizedTopicEndpoint = "/eth/v1/events?topics=finalized_checkpoint" // Endpoint used to subscribe to the head of the chain
-	connectionProtocol       = "http"
+	bcBlockQueryEndpoint     = "/eth/v2/beacon/blocks/"                     // Endpoint to query individual Blocks
+	bcStateQueryEndpoint     = "/eth/v2/debug/beacon/states/"               // Endpoint to query individual States
 )
 
 // A struct that capture the Beacon Server that the Beacon Client will be interacting with and querying.
 type BeaconClient struct {
 	Context                     context.Context                 // A context generic context with multiple uses.
-	ServerAddress               string                          // Address of the Beacon Server
+	ServerEndpoint              string                          // What is the endpoint of the beacon server.
-	ServerPort                  int                             // Port of the Beacon Server
 	PerformHeadTracking         bool                            // Should we track head?
 	PerformHistoricalProcessing bool                            // Should we perform historical processing?
 	HeadTracking                *SseEvents[Head]                // Track the head block
@@ -30,7 +30,7 @@ type BeaconClient struct {
 
 // A struct to keep track of relevant the head event topic.
 type SseEvents[P ProcessedEvents] struct {
-	Url        string          // The url for the subscription. Primarily used for logging
+	Endpoint   string          // The endpoint for the subscription. Primarily used for logging
 	MessagesCh chan *sse.Event // Contains all the messages from the SSE Channel
 	ErrorCh    chan *SseError  // Contains any errors while SSE streaming occurred
 	ProcessCh  chan *P         // Used to capture processed data in its proper struct.
@@ -44,30 +44,30 @@ type SseError struct {
 }
 
 // A Function to create the BeaconClient.
-func CreateBeaconClient(ctx context.Context, bcAddress string, bcPort int) *BeaconClient {
+func CreateBeaconClient(ctx context.Context, connectionProtocol string, bcAddress string, bcPort int) *BeaconClient {
+	endpoint := fmt.Sprintf("%s://%s:%d", connectionProtocol, bcAddress, bcPort)
 	log.Info("Creating the BeaconClient")
 	return &BeaconClient{
 		Context:              ctx,
-		ServerAddress:        bcAddress,
+		ServerEndpoint:       endpoint,
-		ServerPort:           bcPort,
+		HeadTracking:         createSseEvent[Head](endpoint, bcHeadTopicEndpoint),
-		HeadTracking:         createSseEvent[Head](connectionProtocol, bcAddress, bcPort, bcHeadTopicEndpoint),
+		ReOrgTracking:        createSseEvent[ChainReorg](endpoint, bcReorgTopicEndpoint),
-		ReOrgTracking:        createSseEvent[ChainReorg](connectionProtocol, bcAddress, bcPort, bcReorgTopicEndpoint),
+		FinalizationTracking: createSseEvent[FinalizedCheckpoint](endpoint, bcFinalizedTopicEndpoint),
-		FinalizationTracking: createSseEvent[FinalizedCheckpoint](connectionProtocol, bcAddress, bcPort, bcFinalizedTopicEndpoint),
 	}
 }
 
 // Create all the channels to handle a SSE events
-func createSseEvent[P ProcessedEvents](connectionProtocol, bcAddress string, bcPort int, endpoint string) *SseEvents[P] {
+func createSseEvent[P ProcessedEvents](baseEndpoint string, path string) *SseEvents[P] {
-	url := fmt.Sprintf("%s://%s:%d%s", connectionProtocol, bcAddress, bcPort, endpoint)
+	endpoint := baseEndpoint + path
 	sseEvents := &SseEvents[P]{
-		Url:        url,
+		Endpoint:   endpoint,
 		MessagesCh: make(chan *sse.Event),
 		ErrorCh:    make(chan *SseError),
 		ProcessCh:  make(chan *P),
-		SseClient: func(url string) *sse.Client {
+		SseClient: func(endpoint string) *sse.Client {
-			log.WithFields(log.Fields{"url": url}).Info("Creating SSE client")
+			log.WithFields(log.Fields{"endpoint": endpoint}).Info("Creating SSE client")
-			return sse.NewClient(url)
+			return sse.NewClient(endpoint)
-		}(url),
+		}(endpoint),
 	}
 	return sseEvents
 }

pkg/beaconclient/capturehead.go

@@ -1,8 +1,11 @@
+// This file will call all the functions to start and stop capturing the head of the beacon chain.
+
 package beaconclient
 
 import (
 	"time"
 
+	"github.com/ferranbt/fastssz/spectests"
 	log "github.com/sirupsen/logrus"
 	"github.com/vulcanize/ipld-ethcl-indexer/pkg/loghelper"
 )
@@ -10,10 +13,40 @@ import (
 // This function will perform all the heavy lifting for tracking the head of the chain.
 func (bc *BeaconClient) CaptureHead() {
 	log.Info("We are tracking the head of the chain.")
-	go bc.handleHead()
+	bc.tempHelper()
-	go bc.handleFinalizedCheckpoint()
+	// go bc.handleHead()
-	go bc.handleReorgs()
+	// go bc.handleFinalizedCheckpoint()
-	bc.captureEventTopic()
+	// go bc.handleReorgs()
+	// bc.captureEventTopic()
+}
+
+// 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)
 }
 
 // Stop the head tracking service.
@@ -36,11 +69,11 @@ func (bc *BeaconClient) StopHeadTracking() error {
 
 // This function closes the SSE subscription, but waits until the MessagesCh is empty
 func (se *SseEvents[ProcessedEvents]) finishProcessingChannel(finish chan<- bool) {
-	loghelper.LogUrl(se.Url).Info("Received a close event.")
+	loghelper.LogEndpoint(se.Endpoint).Info("Received a close event.")
 	se.SseClient.Unsubscribe(se.MessagesCh)
 	for len(se.MessagesCh) != 0 && len(se.ProcessCh) != 0 {
 		time.Sleep(time.Duration(shutdownWaitInterval) * time.Millisecond)
 	}
-	loghelper.LogUrl(se.Url).Info("Done processing all messages, ready for shutdown")
+	loghelper.LogEndpoint(se.Endpoint).Info("Done processing all messages, ready for shutdown")
 	finish <- true
 }

pkg/beaconclient/healthcheck.go

@@ -3,7 +3,6 @@ package beaconclient
 import (
 	"fmt"
 	"net/http"
-	"strconv"
 
 	log "github.com/sirupsen/logrus"
 	"github.com/vulcanize/ipld-ethcl-indexer/pkg/loghelper"
@@ -15,7 +14,7 @@ import (
 // to follow their provided guidelines. https://lighthouse-book.sigmaprime.io/api-bn.html#security
 func (bc BeaconClient) CheckBeaconClient() error {
 	log.Debug("Attempting to connect to the beacon client")
-	bcEndpoint := "http://" + bc.ServerAddress + ":" + strconv.Itoa(bc.ServerPort) + bcHealthEndpoint
+	bcEndpoint := bc.ServerEndpoint + bcHealthEndpoint
 	resp, err := http.Get(bcEndpoint)
 	if err != nil {
 		loghelper.LogError(err).Error("Unable to get bc endpoint: ", bcEndpoint)

pkg/beaconclient/healthcheck_test.go

@@ -10,8 +10,8 @@ import (
 
 var _ = Describe("Healthcheck", func() {
 	var (
-		BC    = beaconclient.CreateBeaconClient(context.Background(), "localhost", 5052)
+		BC    = beaconclient.CreateBeaconClient(context.Background(), "http", "localhost", 5052)
-		errBc = beaconclient.CreateBeaconClient(context.Background(), "blah-blah", 1010)
+		errBc = beaconclient.CreateBeaconClient(context.Background(), "http", "blah-blah", 1010)
 	)
 	Describe("Connecting to the lighthouse client", Label("integration"), func() {
 		Context("When the client is running", func() {

pkg/beaconclient/incomingsse.go

@@ -18,7 +18,7 @@ var (
 // When new messages come in, it will ensure that they are decoded into JSON.
 // If any errors occur, it log the error information.
 func handleIncomingSseEvent[P ProcessedEvents](eventHandler *SseEvents[P]) {
-	loghelper.LogUrl(eventHandler.Url).Info("Subscribing to Messages")
+	loghelper.LogEndpoint(eventHandler.Endpoint).Info("Subscribing to Messages")
 	go eventHandler.SseClient.SubscribeChanRaw(eventHandler.MessagesCh)
 	for {
 		select {
@@ -30,7 +30,7 @@ func handleIncomingSseEvent[P ProcessedEvents](eventHandler *SseEvents[P]) {
 
 		case headErr := <-eventHandler.ErrorCh:
 			log.WithFields(log.Fields{
-				"url": eventHandler.Url,
+				"endpoint": eventHandler.Endpoint,
 				"err":      headErr.err,
 				"msg":      headErr.msg,
 			},
@@ -44,7 +44,6 @@ func handleIncomingSseEvent[P ProcessedEvents](eventHandler *SseEvents[P]) {
 
 // Turn the data object into a Struct.
 func processMsg[P ProcessedEvents](msg []byte, processCh chan<- *P, errorCh chan<- *SseError) {
-	log.WithFields(log.Fields{"msg": msg}).Info("Processing a Message")
 	var msgMarshaled P
 	err := json.Unmarshal(msg, &msgMarshaled)
 	if err != nil {
@@ -55,7 +54,6 @@ func processMsg[P ProcessedEvents](msg []byte, processCh chan<- *P, errorCh chan
 		}
 		return
 	}
-	log.WithFields(log.Fields{"process": processCh}).Info("Processed")
 	processCh <- &msgMarshaled
 }
 

pkg/beaconclient/processevents.go

@@ -1,3 +1,6 @@
+// This file contains all the functions to handle SSE events after they have been turned
+// to the structs.
+
 package beaconclient
 
 import log "github.com/sirupsen/logrus"

pkg/beaconclient/queryserver.go

@@ -0,0 +1,101 @@
+// This file will contain functions to query the Beacon Chain Server.
+
+package beaconclient
+
+import (
+	"fmt"
+	"io/ioutil"
+	"net/http"
+
+	log "github.com/sirupsen/logrus"
+	"github.com/vulcanize/ipld-ethcl-indexer/pkg/loghelper"
+)
+
+// Attempt to use generics..
+// // These are types that append slot at the end of the URL to handle a request.
+// type SlotBasedRequests interface {
+// 	*specs.BeaconState | *specs.SignedBeaconBlock
+// 	UnmarshalSSZ([]byte) error
+// }
+//
+// func queryState[R SlotBasedRequests](endpoint string, slot string) (R, error) {
+// 	obj := new(R)
+// 	rawState, err := querySlot(endpoint, slot)
+// 	if err != nil {
+// 		return *obj, err
+// 	}
+//
+// 	err = &obj.UnmarshalSSZ(rawState)
+// 	err = (*obj).UnmarshalSSZ(rawState)
+// 	if err != nil {
+// 		loghelper.LogSlotError(slot, err).Error("Unable to unmarshal the SSZ response from the Beacon Node Successfully!")
+// 		return *obj, fmt.Errorf("Unable to unmarshal the SSZ response from the Beacon Node Successfully!: %s", err.Error())
+// 	}
+// 	return *obj, nil
+// }
+
+// This function will query a state object based on the slot provided.
+// The object is SSZ encoded.
+
+//type BeaconBlockResponse struct {
+//	version string `json: `
+//}
+
+// func queryState(endpoint string, slot string) (spectests.BeaconState, error) {
+// 	obj := new(spectests.BeaconState)
+// 	fullEndpoint := endpoint + slot
+// 	rawState, err := querySsz(fullEndpoint, slot)
+// 	if err != nil {
+// 		return *obj, err
+// 	}
+//
+// 	err = obj.UnmarshalSSZ(rawState)
+// 	if err != nil {
+// 		loghelper.LogSlotError(slot, err).Error("Unable to unmarshal the SSZ response from the Beacon Node")
+// 		return *obj, fmt.Errorf("Unable to unmarshal the SSZ response from the Beacon Node: %s", err.Error())
+// 	}
+// 	return *obj, nil
+// }
+//
+// // This function will query a state object based on the slot provided.
+// // The object is SSZ encoded.
+// func queryBlock(endpoint string, slot string) (spectests.SignedBeaconBlock, error) {
+// 	obj := new(spectests.SignedBeaconBlock)
+// 	fullEndpoint := endpoint + slot
+// 	rawBlock, err := querySsz(fullEndpoint, slot)
+// 	if err != nil {
+// 		return *obj, err
+// 	}
+//
+// 	err = obj.UnmarshalSSZ(rawBlock)
+// 	if err != nil {
+// 		loghelper.LogSlotError(slot, err).Error("Unable to unmarshal the SSZ response from the Beacon Node Successfully!")
+// 		return *obj, fmt.Errorf("Unable to unmarshal the SSZ response from the Beacon Node Successfully!: %s", err.Error())
+// 	}
+// 	return *obj, nil
+// }
+
+// A helper function to query endpoints that utilize slots.
+func querySsz(endpoint string, slot string) ([]byte, 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())
+	}
+	// 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())
+	}
+	defer response.Body.Close()
+	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 body, nil
+}

pkg/loghelper/log_endpoint.go

@@ -5,8 +5,8 @@ import (
 )
 
 // A simple helper function that will help wrap the error message.
-func LogUrl(url string) *log.Entry {
+func LogEndpoint(endpoint string) *log.Entry {
 	return log.WithFields(log.Fields{
-		"url": url,
+		"endpoint": endpoint,
 	})
 }

pkg/loghelper/log_error.go

@@ -11,3 +11,10 @@ func LogError(err error) *log.Entry {
 		"err": err,
 	})
 }
+
+func LogSlotError(slot string, err error) *log.Entry {
+	return log.WithFields(log.Fields{
+		"err":  err,
+		"slot": slot,
+	})
+}