.github/workflows/on-pr.yml

@@ -26,7 +26,7 @@ on:
 
 env:
   stack-orchestrator-ref: ${{ github.event.inputs.stack-orchestrator-ref  || 'main'}}
-  ipld-ethcl-db-ref: ${{ github.event.inputs.ipld-ethcl-db-ref  || 'main' }}
+  ipld-ethcl-db-ref: ${{ github.event.inputs.ipld-ethcl-db-ref  || 'feature/historic-process' }}
   ssz-data-ref: ${{ github.event.inputs.ssz-data-ref  || 'main' }}
   GOPATH: /tmp/go
 jobs:

cmd/head.go

@@ -47,18 +47,18 @@ 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,
+	Bc, Db, err := boot.BootApplicationWithRetry(ctx, dbAddress, dbPort, dbName, dbUsername, dbPassword, dbDriver,
-		bcAddress, bcPort, bcConnectionProtocol, bcType, bcBootRetryInterval, bcBootMaxRetry, kgTableIncrement, "historic", testDisregardSync)
+		bcAddress, bcPort, bcConnectionProtocol, bcType, bcBootRetryInterval, bcBootMaxRetry, kgTableIncrement, "head", testDisregardSync)
 	if err != nil {
-		StopApplicationPreBoot(err, DB)
+		StopApplicationPreBoot(err, Db)
 	}
 
 	log.Info("The Beacon Client has booted successfully!")
 	// Capture head blocks
-	go BC.CaptureHead()
+	go Bc.CaptureHead()
 
 	// Shutdown when the time is right.
-	err = shutdown.ShutdownServices(ctx, notifierCh, maxWaitSecondsShutdown, DB, BC)
+	err = shutdown.ShutdownServices(ctx, notifierCh, maxWaitSecondsShutdown, Db, Bc)
 	if err != nil {
 		loghelper.LogError(err).Error("Ungracefully Shutdown ipld-ethcl-indexer!")
 	} else {

cmd/historic.go

@@ -23,6 +23,7 @@ import (
 	log "github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 	"github.com/vulcanize/ipld-ethcl-indexer/internal/boot"
+	"github.com/vulcanize/ipld-ethcl-indexer/internal/shutdown"
 	"github.com/vulcanize/ipld-ethcl-indexer/pkg/database/sql"
 	"github.com/vulcanize/ipld-ethcl-indexer/pkg/loghelper"
 )
@@ -43,10 +44,24 @@ func startHistoricProcessing() {
 	log.Info("Starting the application in head tracking mode.")
 	ctx := context.Background()
 
-	_, DB, err := boot.BootApplicationWithRetry(ctx, dbAddress, dbPort, dbName, dbUsername, dbPassword, dbDriver,
+	Bc, Db, err := boot.BootApplicationWithRetry(ctx, dbAddress, dbPort, dbName, dbUsername, dbPassword, dbDriver,
 		bcAddress, bcPort, bcConnectionProtocol, bcType, bcBootRetryInterval, bcBootMaxRetry, kgTableIncrement, "historic", testDisregardSync)
 	if err != nil {
-		StopApplicationPreBoot(err, DB)
+		StopApplicationPreBoot(err, Db)
+	}
+	errs := Bc.CaptureHistoric(2)
+	if errs != nil {
+		log.WithFields(log.Fields{
+			"TotalErrors": errs,
+		}).Error("The historical processing service ended after receiving too many errors.")
+	}
+
+	// Shutdown when the time is right.
+	err = shutdown.ShutdownServices(ctx, notifierCh, maxWaitSecondsShutdown, Db, Bc)
+	if err != nil {
+		loghelper.LogError(err).Error("Ungracefully Shutdown ipld-ethcl-indexer!")
+	} else {
+		log.Info("Gracefully shutdown ipld-ethcl-indexer")
 	}
 }
 

pkg/beaconclient/beaconclient.go

@@ -94,11 +94,11 @@ func CreateBeaconClient(ctx context.Context, connectionProtocol string, bcAddres
 		HeadTracking:           createSseEvent[Head](endpoint, BcHeadTopicEndpoint),
 		ReOrgTracking:          createSseEvent[ChainReorg](endpoint, bcReorgTopicEndpoint),
 		Metrics: &BeaconClientMetrics{
-			HeadTrackingInserts:   0,
+			SlotInserts:      0,
-			HeadTrackingReorgs:    0,
+			ReorgInserts:     0,
-			HeadTrackingKnownGaps: 0,
+			KnownGapsInserts: 0,
-			HeadError:             0,
+			HeadError:        0,
-			HeadReorgError:        0,
+			HeadReorgError:   0,
 		},
 		//FinalizationTracking: createSseEvent[FinalizedCheckpoint](endpoint, bcFinalizedTopicEndpoint),
 	}

pkg/beaconclient/capturehead_test.go

@@ -44,6 +44,172 @@ import (
 	"github.com/vulcanize/ipld-ethcl-indexer/pkg/database/sql/postgres"
 )
 
+var (
+	address                 string = "localhost"
+	port                    int    = 8080
+	protocol                string = "http"
+	dbHost                  string = "localhost"
+	dbPort                  int    = 8076
+	dbName                  string = "vulcanize_testing"
+	dbUser                  string = "vdbm"
+	dbPassword              string = "password"
+	dbDriver                string = "pgx"
+	dummyParentRoot         string = "46f98c08b54a71dfda4d56e29ec3952b8300cd8d6b67a9b6c562ae96a7a25a42"
+	knownGapsTableIncrement int    = 100000
+	maxRetry                int    = 60
+
+	TestEvents = map[string]Message{
+		"100-dummy": {
+			HeadMessage: beaconclient.Head{
+				Slot:                      "100",
+				Block:                     "04955400371347e26f61d7a4bbda5b23fa0b25d5fc465160f2a92d52a63b919b",
+				State:                     "36d5c9a129979b4502bd9a06e57a742810ecbc3fa55a0361c0723c92c1782bfa",
+				CurrentDutyDependentRoot:  "",
+				PreviousDutyDependentRoot: "",
+				EpochTransition:           false,
+				ExecutionOptimistic:       false,
+			},
+			TestNotes: "A block that is supposed to replicate slot 100, but contains some dummy test information.",
+			MimicConfig: &MimicConfig{
+				ForkVersion: "phase0",
+			},
+			SignedBeaconBlock: filepath.Join("ssz-data", "100", "signed-beacon-block.ssz"),
+			BeaconState:       filepath.Join("ssz-data", "100", "beacon-state.ssz"),
+		},
+		"100-dummy-2": {
+			HeadMessage: beaconclient.Head{
+				Slot:                      "100",
+				Block:                     "04955400371347e26f61d7a4bbda5b23fa0b25d5fc465160f2a9aaaaaaaaaaaa",
+				State:                     "36d5c9a129979b4502bd9a06e57a742810ecbc3fa55a0361c072bbbbbbbbbbbb",
+				CurrentDutyDependentRoot:  "",
+				PreviousDutyDependentRoot: "",
+				EpochTransition:           false,
+				ExecutionOptimistic:       false,
+			},
+			TestNotes: "A block that is supposed to replicate slot 100, but contains some dummy test information.",
+			MimicConfig: &MimicConfig{
+				ForkVersion: "phase0",
+			},
+			SignedBeaconBlock: filepath.Join("ssz-data", "100", "signed-beacon-block.ssz"),
+			BeaconState:       filepath.Join("ssz-data", "100", "beacon-state.ssz"),
+		},
+		"102-wrong-ssz-1": {
+			HeadMessage: beaconclient.Head{
+				Slot:                      "102",
+				Block:                     "0x46f98c08b54a71dfda4d56e29ec3952b8300cd8d6b67a9b6c562ae96a7a25a42",
+				State:                     "0x9b20b114c613c1aa462e02d590b3da902b0a1377e938ed0f94dd3491d763ef67",
+				CurrentDutyDependentRoot:  "",
+				PreviousDutyDependentRoot: "",
+				EpochTransition:           false,
+				ExecutionOptimistic:       false,
+			},
+			TestNotes:         "A bad block that returns the wrong ssz objects, used for testing incorrect SSZ decoding.",
+			BeaconState:       filepath.Join("ssz-data", "102", "signed-beacon-block.ssz"),
+			SignedBeaconBlock: filepath.Join("ssz-data", "102", "beacon-state.ssz"),
+		},
+		"100": {
+			HeadMessage: beaconclient.Head{
+				Slot:                      "100",
+				Block:                     "0x582187e97f7520bb69eea014c3834c964c45259372a0eaaea3f032013797996b",
+				State:                     "0xf286a0379c0386a3c7be28d05d829f8eb7b280cc9ede15449af20ebcd06a7a56",
+				CurrentDutyDependentRoot:  "",
+				PreviousDutyDependentRoot: "",
+				EpochTransition:           false,
+				ExecutionOptimistic:       false,
+			},
+			TestNotes:         "An easy to process Phase 0 block",
+			SignedBeaconBlock: filepath.Join("ssz-data", "100", "signed-beacon-block.ssz"),
+			BeaconState:       filepath.Join("ssz-data", "100", "beacon-state.ssz"),
+		},
+		"101": {
+			HeadMessage: beaconclient.Head{
+				Slot:                      "101",
+				Block:                     "0xabe1a972e512182d04f0d4a5c9c25f9ee57c2e9d0ff3f4c4c82fd42d13d31083",
+				State:                     "0xcb04aa2edbf13c7bb7e7bd9b621ced6832e0075e89147352eac3019a824ce847",
+				CurrentDutyDependentRoot:  "",
+				PreviousDutyDependentRoot: "",
+				EpochTransition:           false,
+				ExecutionOptimistic:       false,
+			},
+			TestNotes:         "An easy to process Phase 0 block",
+			SignedBeaconBlock: filepath.Join("ssz-data", "101", "signed-beacon-block.ssz"),
+			BeaconState:       filepath.Join("ssz-data", "101", "beacon-state.ssz"),
+		},
+		"2375703-dummy": {
+			HeadMessage: beaconclient.Head{
+				Slot:                      "2375703",
+				Block:                     "c9fb337b62e2a0dae4f27ab49913132570f7f2cab3f23ad99f4d07508a8e648e",
+				State:                     "0299a145bcda2c8f5e7d2e068ee101861edbee2ec1db2d5e1d850b0d265aef5f",
+				CurrentDutyDependentRoot:  "",
+				PreviousDutyDependentRoot: "",
+				EpochTransition:           false,
+				ExecutionOptimistic:       false,
+			},
+			TestNotes: "This is a dummy message that is used for reorgs",
+			MimicConfig: &MimicConfig{
+				ForkVersion: "altair",
+			},
+			SignedBeaconBlock: filepath.Join("ssz-data", "2375703", "signed-beacon-block.ssz"),
+			BeaconState:       filepath.Join("ssz-data", "2375703", "beacon-state.ssz"),
+		},
+		"2375703-dummy-2": {
+			HeadMessage: beaconclient.Head{
+				Slot:                      "2375703",
+				Block:                     "c9fb337b62e2a0dae4f27ab49913132570f7f2cab3f23ad99f4d07508aaaaaaa",
+				State:                     "0299a145bcda2c8f5e7d2e068ee101861edbee2ec1db2d5e1d850b0d2bbbbbbb",
+				CurrentDutyDependentRoot:  "",
+				PreviousDutyDependentRoot: "",
+				EpochTransition:           false,
+				ExecutionOptimistic:       false,
+			},
+			TestNotes: "This is a dummy message that is used for reorgs",
+			MimicConfig: &MimicConfig{
+				ForkVersion: "altair",
+			},
+			SignedBeaconBlock: filepath.Join("ssz-data", "2375703", "signed-beacon-block.ssz"),
+			BeaconState:       filepath.Join("ssz-data", "2375703", "beacon-state.ssz"),
+		},
+		"2375703": {
+			HeadMessage: beaconclient.Head{
+				Slot:                     "2375703",
+				Block:                    "0x4392372c5f6e39499e31bf924388b5815639103149f0f54f8a453773b1802301",
+				State:                    "0xb6215b560273af63ec7e011572b60ec1ca0b0232f8ff44fcd4ed55c7526e964e",
+				CurrentDutyDependentRoot: "", PreviousDutyDependentRoot: "", EpochTransition: false, ExecutionOptimistic: false},
+			TestNotes:         "An easy to process Altair Block",
+			SignedBeaconBlock: filepath.Join("ssz-data", "2375703", "signed-beacon-block.ssz"),
+			BeaconState:       filepath.Join("ssz-data", "2375703", "beacon-state.ssz"),
+		},
+		"3797056": {
+			HeadMessage: beaconclient.Head{
+				Slot:                     "3797056",
+				Block:                    "",
+				State:                    "0xb6215b560273af63ec7e011572b60ec1ca0b0232f8ff44fcd4ed55c7526e964e",
+				CurrentDutyDependentRoot: "", PreviousDutyDependentRoot: "", EpochTransition: false, ExecutionOptimistic: false},
+			TestNotes:         "An easy to process Altair Block",
+			SignedBeaconBlock: filepath.Join("ssz-data", "2375703", "signed-beacon-block.ssz"),
+			BeaconState:       filepath.Join("ssz-data", "2375703", "beacon-state.ssz"),
+		},
+	}
+	TestConfig = Config{
+		protocol:                protocol,
+		address:                 address,
+		port:                    port,
+		dummyParentRoot:         dummyParentRoot,
+		dbHost:                  dbHost,
+		dbPort:                  dbPort,
+		dbName:                  dbName,
+		dbUser:                  dbUser,
+		dbPassword:              dbPassword,
+		dbDriver:                dbDriver,
+		knownGapsTableIncrement: knownGapsTableIncrement,
+	}
+
+	BeaconNodeTester = TestBeaconNode{
+		TestEvents: TestEvents,
+		TestConfig: TestConfig,
+	}
+)
+
 type Message struct {
 	HeadMessage       beaconclient.Head // The head messsage that will be streamed to the BeaconClient
 	TestNotes         string            // A small explanation of the purpose this structure plays in the testing landscape.
@@ -61,177 +227,6 @@ type MimicConfig struct {
 
 var _ = Describe("Capturehead", func() {
 
-	var (
-		TestConfig              Config
-		BeaconNodeTester        TestBeaconNode
-		address                 string = "localhost"
-		port                    int    = 8080
-		protocol                string = "http"
-		TestEvents              map[string]Message
-		dbHost                  string = "localhost"
-		dbPort                  int    = 8076
-		dbName                  string = "vulcanize_testing"
-		dbUser                  string = "vdbm"
-		dbPassword              string = "password"
-		dbDriver                string = "pgx"
-		dummyParentRoot         string = "46f98c08b54a71dfda4d56e29ec3952b8300cd8d6b67a9b6c562ae96a7a25a42"
-		knownGapsTableIncrement int    = 100000
-		maxRetry                int    = 60
-	)
-
-	BeforeEach(func() {
-		TestEvents = map[string]Message{
-			"100-dummy": {
-				HeadMessage: beaconclient.Head{
-					Slot:                      "100",
-					Block:                     "04955400371347e26f61d7a4bbda5b23fa0b25d5fc465160f2a92d52a63b919b",
-					State:                     "36d5c9a129979b4502bd9a06e57a742810ecbc3fa55a0361c0723c92c1782bfa",
-					CurrentDutyDependentRoot:  "",
-					PreviousDutyDependentRoot: "",
-					EpochTransition:           false,
-					ExecutionOptimistic:       false,
-				},
-				TestNotes: "A block that is supposed to replicate slot 100, but contains some dummy test information.",
-				MimicConfig: &MimicConfig{
-					ForkVersion: "phase0",
-				},
-				SignedBeaconBlock: filepath.Join("ssz-data", "100", "signed-beacon-block.ssz"),
-				BeaconState:       filepath.Join("ssz-data", "100", "beacon-state.ssz"),
-			},
-			"100-dummy-2": {
-				HeadMessage: beaconclient.Head{
-					Slot:                      "100",
-					Block:                     "04955400371347e26f61d7a4bbda5b23fa0b25d5fc465160f2a9aaaaaaaaaaaa",
-					State:                     "36d5c9a129979b4502bd9a06e57a742810ecbc3fa55a0361c072bbbbbbbbbbbb",
-					CurrentDutyDependentRoot:  "",
-					PreviousDutyDependentRoot: "",
-					EpochTransition:           false,
-					ExecutionOptimistic:       false,
-				},
-				TestNotes: "A block that is supposed to replicate slot 100, but contains some dummy test information.",
-				MimicConfig: &MimicConfig{
-					ForkVersion: "phase0",
-				},
-				SignedBeaconBlock: filepath.Join("ssz-data", "100", "signed-beacon-block.ssz"),
-				BeaconState:       filepath.Join("ssz-data", "100", "beacon-state.ssz"),
-			},
-			"102-wrong-ssz-1": {
-				HeadMessage: beaconclient.Head{
-					Slot:                      "102",
-					Block:                     "0x46f98c08b54a71dfda4d56e29ec3952b8300cd8d6b67a9b6c562ae96a7a25a42",
-					State:                     "0x9b20b114c613c1aa462e02d590b3da902b0a1377e938ed0f94dd3491d763ef67",
-					CurrentDutyDependentRoot:  "",
-					PreviousDutyDependentRoot: "",
-					EpochTransition:           false,
-					ExecutionOptimistic:       false,
-				},
-				TestNotes:         "A bad block that returns the wrong ssz objects, used for testing incorrect SSZ decoding.",
-				BeaconState:       filepath.Join("ssz-data", "102", "signed-beacon-block.ssz"),
-				SignedBeaconBlock: filepath.Join("ssz-data", "102", "beacon-state.ssz"),
-			},
-			"100": {
-				HeadMessage: beaconclient.Head{
-					Slot:                      "100",
-					Block:                     "0x582187e97f7520bb69eea014c3834c964c45259372a0eaaea3f032013797996b",
-					State:                     "0xf286a0379c0386a3c7be28d05d829f8eb7b280cc9ede15449af20ebcd06a7a56",
-					CurrentDutyDependentRoot:  "",
-					PreviousDutyDependentRoot: "",
-					EpochTransition:           false,
-					ExecutionOptimistic:       false,
-				},
-				TestNotes:         "An easy to process Phase 0 block",
-				SignedBeaconBlock: filepath.Join("ssz-data", "100", "signed-beacon-block.ssz"),
-				BeaconState:       filepath.Join("ssz-data", "100", "beacon-state.ssz"),
-			},
-			"101": {
-				HeadMessage: beaconclient.Head{
-					Slot:                      "101",
-					Block:                     "0xabe1a972e512182d04f0d4a5c9c25f9ee57c2e9d0ff3f4c4c82fd42d13d31083",
-					State:                     "0xcb04aa2edbf13c7bb7e7bd9b621ced6832e0075e89147352eac3019a824ce847",
-					CurrentDutyDependentRoot:  "",
-					PreviousDutyDependentRoot: "",
-					EpochTransition:           false,
-					ExecutionOptimistic:       false,
-				},
-				TestNotes:         "An easy to process Phase 0 block",
-				SignedBeaconBlock: filepath.Join("ssz-data", "101", "signed-beacon-block.ssz"),
-				BeaconState:       filepath.Join("ssz-data", "101", "beacon-state.ssz"),
-			},
-			"2375703-dummy": {
-				HeadMessage: beaconclient.Head{
-					Slot:                      "2375703",
-					Block:                     "c9fb337b62e2a0dae4f27ab49913132570f7f2cab3f23ad99f4d07508a8e648e",
-					State:                     "0299a145bcda2c8f5e7d2e068ee101861edbee2ec1db2d5e1d850b0d265aef5f",
-					CurrentDutyDependentRoot:  "",
-					PreviousDutyDependentRoot: "",
-					EpochTransition:           false,
-					ExecutionOptimistic:       false,
-				},
-				TestNotes: "This is a dummy message that is used for reorgs",
-				MimicConfig: &MimicConfig{
-					ForkVersion: "altair",
-				},
-				SignedBeaconBlock: filepath.Join("ssz-data", "2375703", "signed-beacon-block.ssz"),
-				BeaconState:       filepath.Join("ssz-data", "2375703", "beacon-state.ssz"),
-			},
-			"2375703-dummy-2": {
-				HeadMessage: beaconclient.Head{
-					Slot:                      "2375703",
-					Block:                     "c9fb337b62e2a0dae4f27ab49913132570f7f2cab3f23ad99f4d07508aaaaaaa",
-					State:                     "0299a145bcda2c8f5e7d2e068ee101861edbee2ec1db2d5e1d850b0d2bbbbbbb",
-					CurrentDutyDependentRoot:  "",
-					PreviousDutyDependentRoot: "",
-					EpochTransition:           false,
-					ExecutionOptimistic:       false,
-				},
-				TestNotes: "This is a dummy message that is used for reorgs",
-				MimicConfig: &MimicConfig{
-					ForkVersion: "altair",
-				},
-				SignedBeaconBlock: filepath.Join("ssz-data", "2375703", "signed-beacon-block.ssz"),
-				BeaconState:       filepath.Join("ssz-data", "2375703", "beacon-state.ssz"),
-			},
-			"2375703": {
-				HeadMessage: beaconclient.Head{
-					Slot:                     "2375703",
-					Block:                    "0x4392372c5f6e39499e31bf924388b5815639103149f0f54f8a453773b1802301",
-					State:                    "0xb6215b560273af63ec7e011572b60ec1ca0b0232f8ff44fcd4ed55c7526e964e",
-					CurrentDutyDependentRoot: "", PreviousDutyDependentRoot: "", EpochTransition: false, ExecutionOptimistic: false},
-				TestNotes:         "An easy to process Altair Block",
-				SignedBeaconBlock: filepath.Join("ssz-data", "2375703", "signed-beacon-block.ssz"),
-				BeaconState:       filepath.Join("ssz-data", "2375703", "beacon-state.ssz"),
-			},
-			"3797056": {
-				HeadMessage: beaconclient.Head{
-					Slot:                     "3797056",
-					Block:                    "",
-					State:                    "0xb6215b560273af63ec7e011572b60ec1ca0b0232f8ff44fcd4ed55c7526e964e",
-					CurrentDutyDependentRoot: "", PreviousDutyDependentRoot: "", EpochTransition: false, ExecutionOptimistic: false},
-				TestNotes:         "An easy to process Altair Block",
-				SignedBeaconBlock: filepath.Join("ssz-data", "2375703", "signed-beacon-block.ssz"),
-				BeaconState:       filepath.Join("ssz-data", "2375703", "beacon-state.ssz"),
-			},
-		}
-		TestConfig = Config{
-			protocol:                protocol,
-			address:                 address,
-			port:                    port,
-			dummyParentRoot:         dummyParentRoot,
-			dbHost:                  dbHost,
-			dbPort:                  dbPort,
-			dbName:                  dbName,
-			dbUser:                  dbUser,
-			dbPassword:              dbPassword,
-			dbDriver:                dbDriver,
-			knownGapsTableIncrement: knownGapsTableIncrement,
-		}
-
-		BeaconNodeTester = TestBeaconNode{
-			TestEvents: TestEvents,
-			TestConfig: TestConfig,
-		}
-	})
-
 	Describe("Receiving New Head SSE messages", Label("unit", "behavioral"), func() {
 		Context("Correctly formatted Phase0 Block", func() {
 			It("Should turn it into a struct successfully.", func() {
@@ -254,7 +249,7 @@ var _ = Describe("Capturehead", func() {
 				validateBeaconState(bc, BeaconNodeTester.TestEvents["2375703"].HeadMessage, "/blocks/QHVAEQRQPBRDMMRRGVRDKNRQGI3TGYLGGYZWKYZXMUYDCMJVG4ZGENRQMVRTCY3BGBRDAMRTGJTDQZTGGQ2GMY3EGRSWINJVMM3TKMRWMU4TMNDF")
 			})
 		})
-		Context("Correctly formatted Altair Test Blocks", Label("now"), func() {
+		Context("Correctly formatted Altair Test Blocks", func() {
 			It("Should turn it into a struct successfully.", func() {
 				bc := setUpTest(BeaconNodeTester.TestConfig, "2375702")
 				BeaconNodeTester.SetupBeaconNodeMock(BeaconNodeTester.TestEvents, BeaconNodeTester.TestConfig.protocol, BeaconNodeTester.TestConfig.address, BeaconNodeTester.TestConfig.port, BeaconNodeTester.TestConfig.dummyParentRoot)
@@ -491,7 +486,7 @@ func sendHeadMessage(bc *beaconclient.BeaconClient, head beaconclient.Head, maxR
 	data, err := json.Marshal(head)
 	Expect(err).ToNot(HaveOccurred())
 
-	startInserts := atomic.LoadUint64(&bc.Metrics.HeadTrackingInserts)
+	startInserts := atomic.LoadUint64(&bc.Metrics.SlotInserts)
 	bc.HeadTracking.MessagesCh <- &sse.Event{
 		ID:    []byte{},
 		Data:  data,
@@ -499,13 +494,13 @@ func sendHeadMessage(bc *beaconclient.BeaconClient, head beaconclient.Head, maxR
 		Retry: []byte{},
 	}
 	curRetry := 0
-	for atomic.LoadUint64(&bc.Metrics.HeadTrackingInserts) != startInserts+expectedSuccessfulInserts {
+	for atomic.LoadUint64(&bc.Metrics.SlotInserts) != startInserts+expectedSuccessfulInserts {
 		time.Sleep(1 * time.Second)
 		curRetry = curRetry + 1
 		if curRetry == maxRetry {
 			log.WithFields(log.Fields{
 				"startInsert":  startInserts,
-				"currentValue": atomic.LoadUint64(&bc.Metrics.HeadTrackingInserts),
+				"currentValue": atomic.LoadUint64(&bc.Metrics.SlotInserts),
 			}).Error("HeadTracking Insert wasn't incremented properly.")
 			Fail("Too many retries have occurred.")
 		}
@@ -517,7 +512,9 @@ func queryDbSlotAndBlock(db sql.Database, querySlot string, queryBlockRoot strin
 	sqlStatement := `SELECT epoch, slot, block_root, state_root, status FROM ethcl.slots WHERE slot=$1 AND block_root=$2;`
 	var epoch, slot int
 	var blockRoot, stateRoot, status string
+	log.Debug("Starting to query the ethcl.slots table, ", querySlot, " ", queryBlockRoot)
 	row := db.QueryRow(context.Background(), sqlStatement, querySlot, queryBlockRoot)
+	log.Debug("Querying the ethcl.slots table complete")
 	err := row.Scan(&epoch, &slot, &blockRoot, &stateRoot, &status)
 	Expect(err).ToNot(HaveOccurred())
 	return epoch, slot, blockRoot, stateRoot, status
@@ -567,7 +564,7 @@ func queryKnownGaps(db sql.Database, queryStartGap string, QueryEndGap string) (
 
 // A function that will remove all entries from the ethcl tables for you.
 func clearEthclDbTables(db sql.Database) {
-	deleteQueries := []string{"DELETE FROM ethcl.slots;", "DELETE FROM ethcl.signed_beacon_block;", "DELETE FROM ethcl.beacon_state;", "DELETE FROM ethcl.known_gaps;"}
+	deleteQueries := []string{"DELETE FROM ethcl.slots;", "DELETE FROM ethcl.signed_beacon_block;", "DELETE FROM ethcl.beacon_state;", "DELETE FROM ethcl.known_gaps;", "DELETE FROM ethcl.historic_process"}
 	for _, queries := range deleteQueries {
 		_, err := db.Exec(context.Background(), queries)
 		Expect(err).ToNot(HaveOccurred())
@@ -670,6 +667,31 @@ func (tbc TestBeaconNode) SetupBeaconNodeMock(TestEvents map[string]Message, pro
 			return httpmock.NewBytesResponse(200, dat), nil
 		},
 	)
+	blockRootUrl := `=~^` + protocol + "://" + address + ":" + strconv.Itoa(port) + "/eth/v1/beacon/blocks/" + `([^/]+)` + "/root"
+	httpmock.RegisterResponder("GET", blockRootUrl,
+		func(req *http.Request) (*http.Response, error) {
+			// Get ID from request
+			slot := httpmock.MustGetSubmatch(req, 1)
+			dat, err := tbc.provideBlockRoot(slot)
+			if err != nil {
+				Expect(err).NotTo(HaveOccurred())
+				return httpmock.NewStringResponse(404, fmt.Sprintf("Unable to find block root for %s", slot)), err
+			}
+			return httpmock.NewBytesResponse(200, dat), nil
+		},
+	)
+}
+
+func (tbc TestBeaconNode) provideBlockRoot(slot string) ([]byte, error) {
+
+	for _, val := range tbc.TestEvents {
+		if val.HeadMessage.Slot == slot && val.MimicConfig == nil {
+			block, err := hex.DecodeString(val.HeadMessage.Block[2:])
+			Expect(err).ToNot(HaveOccurred())
+			return block, nil
+		}
+	}
+	return nil, fmt.Errorf("Unable to find the Blockroot in test object.")
 }
 
 // A function to mimic querying the state from the beacon node. We simply get the SSZ file are return it.
@@ -779,7 +801,7 @@ func (tbc TestBeaconNode) testMultipleReorgs(bc *beaconclient.BeaconClient, firs
 	sendHeadMessage(bc, thirdHead, maxRetry, 1)
 
 	curRetry := 0
-	for atomic.LoadUint64(&bc.Metrics.HeadTrackingReorgs) != 2 {
+	for atomic.LoadUint64(&bc.Metrics.ReorgInserts) != 2 {
 		time.Sleep(1 * time.Second)
 		curRetry = curRetry + 1
 		if curRetry == maxRetry {
@@ -810,7 +832,7 @@ func (tbc TestBeaconNode) testMultipleReorgs(bc *beaconclient.BeaconClient, firs
 	}
 
 	curRetry = 0
-	for atomic.LoadUint64(&bc.Metrics.HeadTrackingReorgs) != 3 {
+	for atomic.LoadUint64(&bc.Metrics.ReorgInserts) != 3 {
 		time.Sleep(1 * time.Second)
 		curRetry = curRetry + 1
 		if curRetry == maxRetry {
@@ -818,7 +840,7 @@ func (tbc TestBeaconNode) testMultipleReorgs(bc *beaconclient.BeaconClient, firs
 		}
 	}
 
-	if bc.Metrics.HeadTrackingKnownGaps != 0 {
+	if bc.Metrics.KnownGapsInserts != 0 {
 		Fail("We found gaps when processing a single block")
 	}
 
@@ -837,20 +859,20 @@ func (tbc TestBeaconNode) testProcessBlock(bc *beaconclient.BeaconClient, head b
 	sendHeadMessage(bc, head, maxRetry, expectedSuccessInsert)
 
 	curRetry := 0
-	for atomic.LoadUint64(&bc.Metrics.HeadTrackingKnownGaps) != expectedKnownGaps {
+	for atomic.LoadUint64(&bc.Metrics.KnownGapsInserts) != expectedKnownGaps {
 		time.Sleep(1 * time.Second)
 		curRetry = curRetry + 1
 		if curRetry == maxRetry {
-			Fail(fmt.Sprintf("Wrong gap metrics, got: %d, wanted %d", bc.Metrics.HeadTrackingKnownGaps, expectedKnownGaps))
+			Fail(fmt.Sprintf("Wrong gap metrics, got: %d, wanted %d", bc.Metrics.KnownGapsInserts, expectedKnownGaps))
 		}
 	}
 
 	curRetry = 0
-	for atomic.LoadUint64(&bc.Metrics.HeadTrackingReorgs) != expectedReorgs {
+	for atomic.LoadUint64(&bc.Metrics.ReorgInserts) != expectedReorgs {
 		time.Sleep(1 * time.Second)
 		curRetry = curRetry + 1
 		if curRetry == maxRetry {
-			Fail(fmt.Sprintf("Wrong reorg metrics, got: %d, wanted %d", bc.Metrics.HeadTrackingKnownGaps, expectedKnownGaps))
+			Fail(fmt.Sprintf("Wrong reorg metrics, got: %d, wanted %d", bc.Metrics.KnownGapsInserts, expectedKnownGaps))
 		}
 	}
 
@@ -869,7 +891,7 @@ func (tbc TestBeaconNode) testMultipleHead(bc *beaconclient.BeaconClient, firstH
 	sendHeadMessage(bc, secondHead, maxRetry, 1)
 
 	curRetry := 0
-	for atomic.LoadUint64(&bc.Metrics.HeadTrackingReorgs) != 1 {
+	for atomic.LoadUint64(&bc.Metrics.ReorgInserts) != 1 {
 		time.Sleep(1 * time.Second)
 		curRetry = curRetry + 1
 		if curRetry == maxRetry {
@@ -877,7 +899,7 @@ func (tbc TestBeaconNode) testMultipleHead(bc *beaconclient.BeaconClient, firstH
 		}
 	}
 
-	if bc.Metrics.HeadTrackingKnownGaps != 0 {
+	if bc.Metrics.KnownGapsInserts != 0 {
 		Fail("We found gaps when processing a single block")
 	}
 
@@ -898,7 +920,7 @@ func (tbc TestBeaconNode) testKnownGapsMessages(bc *beaconclient.BeaconClient, t
 	}
 
 	curRetry := 0
-	for atomic.LoadUint64(&bc.Metrics.HeadTrackingKnownGaps) != expectedEntries {
+	for atomic.LoadUint64(&bc.Metrics.KnownGapsInserts) != expectedEntries {
 		time.Sleep(1 * time.Second)
 		curRetry = curRetry + 1
 		if curRetry == maxRetry {
@@ -910,7 +932,7 @@ func (tbc TestBeaconNode) testKnownGapsMessages(bc *beaconclient.BeaconClient, t
 	knownGapCount := countKnownGapsTable(bc.Db)
 	Expect(knownGapCount).To(Equal(int(expectedEntries)))
 
-	if atomic.LoadUint64(&bc.Metrics.HeadTrackingReorgs) != 0 {
+	if atomic.LoadUint64(&bc.Metrics.ReorgInserts) != 0 {
 		Fail("We found reorgs when we didn't expect it")
 	}
 }

pkg/beaconclient/capturehistoric.go

@@ -17,12 +17,104 @@
 
 package beaconclient
 
-import log "github.com/sirupsen/logrus"
+import (
+	log "github.com/sirupsen/logrus"
+	"github.com/vulcanize/ipld-ethcl-indexer/pkg/database/sql"
+	"golang.org/x/sync/errgroup"
+)
 
 // This function will perform all the heavy lifting for tracking the head of the chain.
-func (bc *BeaconClient) CaptureHistoric() {
+func (bc *BeaconClient) CaptureHistoric(maxWorkers int) []error {
 	log.Info("We are starting the historical processing service.")
-	go bc.handleHead()
+	hp := historicProcessing{db: bc.Db, metrics: bc.Metrics}
-	go bc.handleReorg()
+	errs := handleBatchProcess(maxWorkers, hp, hp.db, bc.ServerEndpoint, bc.Metrics)
-	bc.captureEventTopic()
+	log.Debug("Exiting Historical")
+	return errs
+}
+
+// An interface to enforce any batch processing. Currently there are two use cases for this.
+//
+// 1. Historic Processing
+//
+// 2. Known Gaps Processing
+type BatchProcessing interface {
+	getSlotRange(chan<- slotsToProcess) []error // Write the slots to process in a channel, return an error if you cant get the next slots to write.
+	handleProcessingErrors(<-chan batchHistoricError)
+	removeTableEntry(<-chan slotsToProcess) error // With the provided start and end slot, remove the entry from the database.
+}
+
+// A struct to pass around indicating a table entry for slots to process.
+type slotsToProcess struct {
+	startSlot int // The start slot
+	endSlot   int // The end slot
+}
+
+type batchHistoricError struct {
+	err        error  // The error that occurred when attempting to a slot
+	errProcess string // The process that caused the error.
+	slot       int    // The slot which the error is for.
+}
+
+// Wrapper function for the BatchProcessing interface.
+// This function will take the structure that needs batch processing.
+// It follows a generic format.
+// Get new entries from any given table.
+// 1. Add it to the slotsCh.
+//
+// 2. Run the maximum specified workers to handle individual slots. We need a maximum because we don't want
+// To store too many SSZ objects in memory.
+//
+// 3. Process the slots and send the err to the ErrCh. Each structure can define how it wants its own errors handled.
+//
+// 4. Remove the slot entry from the DB.
+//
+// 5. Handle any errors.
+func handleBatchProcess(maxWorkers int, bp BatchProcessing, db sql.Database, serverEndpoint string, metrics *BeaconClientMetrics) []error {
+	slotsCh := make(chan slotsToProcess)
+	workCh := make(chan int)
+	processedCh := make(chan slotsToProcess)
+	errCh := make(chan batchHistoricError)
+	finishCh := make(chan []error, 1)
+
+	// Start workers
+	for w := 1; w <= maxWorkers; w++ {
+		log.WithFields(log.Fields{"maxWorkers": maxWorkers}).Debug("Starting historic processing workers")
+		go processSlotRangeWorker(workCh, errCh, db, serverEndpoint, metrics)
+	}
+
+	// Process all ranges and send each individual slot to the worker.
+	go func() {
+		for slots := range slotsCh {
+			for i := slots.startSlot; i <= slots.endSlot; i++ {
+				workCh <- i
+			}
+			processedCh <- slots
+		}
+	}()
+
+	// Remove entries, end the application if a row cannot be removed..
+	go func() {
+		errG := new(errgroup.Group)
+		errG.Go(func() error {
+			return bp.removeTableEntry(processedCh)
+		})
+		if err := errG.Wait(); err != nil {
+			finishCh <- []error{err}
+		}
+	}()
+	// Process errors from slot processing.
+	go bp.handleProcessingErrors(errCh)
+
+	// Get slots from the DB.
+	go func() {
+		errs := bp.getSlotRange(slotsCh) // Periodically adds new entries....
+		if errs != nil {
+			finishCh <- errs
+		}
+		finishCh <- nil
+	}()
+
+	errs := <-finishCh
+	log.Debug("Finishing the batchProcess")
+	return errs
 }

pkg/beaconclient/capturehistoric_test.go

@@ -0,0 +1,70 @@
+package beaconclient_test
+
+import (
+	"context"
+	"fmt"
+	"sync/atomic"
+	"time"
+
+	"github.com/jarcoal/httpmock"
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+	log "github.com/sirupsen/logrus"
+	"github.com/vulcanize/ipld-ethcl-indexer/pkg/beaconclient"
+)
+
+var _ = Describe("Capturehistoric", func() {
+
+	Describe("Run the application in historic mode", Label("unit", "behavioral"), func() {
+		Context("Phase0: When we need to process a single block in the ethcl.historic_process table.", Label("now"), func() {
+			It("Successfully Process the Block", func() {
+				bc := setUpTest(BeaconNodeTester.TestConfig, "99")
+				BeaconNodeTester.SetupBeaconNodeMock(BeaconNodeTester.TestEvents, BeaconNodeTester.TestConfig.protocol, BeaconNodeTester.TestConfig.address, BeaconNodeTester.TestConfig.port, BeaconNodeTester.TestConfig.dummyParentRoot)
+				defer httpmock.DeactivateAndReset()
+				BeaconNodeTester.writeEventToHistoricProcess(bc, 100, 101, 10)
+				log.SetLevel(log.DebugLevel)
+				BeaconNodeTester.runBatchProcess(bc, 2, 100, 101, 0, 0)
+
+				validateSlot(bc, BeaconNodeTester.TestEvents["100"].HeadMessage, 3, "proposed")
+				//validateSignedBeaconBlock(bc, BeaconNodeTester.TestEvents["100"].HeadMessage, "0x629ae1587895043076500f4f5dcb202a47c2fc95d5b5c548cb83bc97bd2dbfe1", "0x8d3f027beef5cbd4f8b29fc831aba67a5d74768edca529f5596f07fd207865e1", "/blocks/QHVAEQBQGQ4TKNJUGAYDGNZRGM2DOZJSGZTDMMLEG5QTIYTCMRQTKYRSGNTGCMDCGI2WINLGMM2DMNJRGYYGMMTBHEZGINJSME3DGYRZGE4WE")
+				//validateBeaconState(bc, BeaconNodeTester.TestEvents["100"].HeadMessage, "/blocks/QHVAEQRQPBTDEOBWMEYDGNZZMMYDGOBWMEZWGN3CMUZDQZBQGVSDQMRZMY4GKYRXMIZDQMDDMM4WKZDFGE2TINBZMFTDEMDFMJRWIMBWME3WCNJW")
+
+				//validateSignedBeaconBlock(bc, BeaconNodeTester.TestEvents["101"].HeadMessage, "0x629ae1587895043076500f4f5dcb202a47c2fc95d5b5c548cb83bc97bd2dbfe1", "0x8d3f027beef5cbd4f8b29fc831aba67a5d74768edca529f5596f07fd207865e1", "/blocks/QHVAEQBQGQ4TKNJUGAYDGNZRGM2DOZJSGZTDMMLEG5QTIYTCMRQTKYRSGNTGCMDCGI2WINLGMM2DMNJRGYYGMMTBHEZGINJSME3DGYRZGE4WE")
+				//validateBeaconState(bc, BeaconNodeTester.TestEvents["101"].HeadMessage, "/blocks/QHVAEQRQPBTDEOBWMEYDGNZZMMYDGOBWMEZWGN3CMUZDQZBQGVSDQMRZMY4GKYRXMIZDQMDDMM4WKZDFGE2TINBZMFTDEMDFMJRWIMBWME3WCNJW")
+
+			})
+		})
+	})
+})
+
+// This function will write an even to the ethcl.historic_process table
+func (tbc TestBeaconNode) writeEventToHistoricProcess(bc *beaconclient.BeaconClient, startSlot, endSlot, priority int) {
+	log.Debug("We are writing the necessary events to batch process")
+	insertHistoricProcessingStmt := `INSERT INTO ethcl.historic_process (start_slot, end_slot, priority)
+	VALUES ($1, $2, $3);`
+	res, err := bc.Db.Exec(context.Background(), insertHistoricProcessingStmt, startSlot, endSlot, priority)
+	Expect(err)
+	rows, err := res.RowsAffected()
+	if rows != 1 {
+		Fail("We didnt write...")
+	}
+	Expect(err)
+}
+
+// Start the batch processing function, and check for the correct inserted slots.
+func (tbc TestBeaconNode) runBatchProcess(bc *beaconclient.BeaconClient, maxWorkers int, startSlot uint64, endSlot uint64, expectedReorgs uint64, expectedKnownGaps uint64) {
+	go bc.CaptureHistoric(maxWorkers)
+	diff := endSlot - startSlot + 1
+
+	curRetry := 0
+	for atomic.LoadUint64(&bc.Metrics.SlotInserts) != diff {
+		time.Sleep(1 * time.Second)
+		curRetry = curRetry + 1
+		if curRetry == maxRetry {
+			Fail(fmt.Sprintf("Too many retries have occurred. The number of inserts expects %d, the number that actually occurred, %d", atomic.LoadUint64(&bc.Metrics.SlotInserts), diff))
+		}
+	}
+
+	Expect(atomic.LoadUint64(&bc.Metrics.KnownGapsInserts)).To(Equal(expectedKnownGaps))
+	Expect(atomic.LoadUint64(&bc.Metrics.ReorgInserts)).To(Equal(expectedKnownGaps))
+}

pkg/beaconclient/databasewrite.go

@@ -148,8 +148,10 @@ func (dw *DatabaseWriter) writeFullSlot() error {
 	}).Debug("Starting to write to the DB.")
 	err := dw.writeSlots()
 	if err != nil {
+		loghelper.LogSlotError(dw.DbSlots.Slot, err).Debug("We couldnt write to the ethcl.slots table...")
 		return err
 	}
+	log.Debug("We finished writing to the ethcl.slots table.")
 	if dw.DbSlots.Status != "skipped" {
 		err = dw.writeSignedBeaconBlocks()
 		if err != nil {

pkg/beaconclient/metrics.go

@@ -21,29 +21,29 @@ import (
 
 // A structure utilized for keeping track of various metrics. Currently, mostly used in testing.
 type BeaconClientMetrics struct {
-	HeadTrackingInserts   uint64 // Number of head events we successfully wrote to the DB.
+	SlotInserts      uint64 // Number of head events we successfully wrote to the DB.
-	HeadTrackingReorgs    uint64 // Number of reorg events we successfully wrote to the DB.
+	ReorgInserts     uint64 // Number of reorg events we successfully wrote to the DB.
-	HeadTrackingKnownGaps uint64 // Number of known_gaps we successfully wrote to the DB.
+	KnownGapsInserts uint64 // Number of known_gaps we successfully wrote to the DB.
-	HeadError             uint64 // Number of errors that occurred when decoding the head message.
+	HeadError        uint64 // Number of errors that occurred when decoding the head message.
-	HeadReorgError        uint64 // Number of errors that occurred when decoding the reorg message.
+	HeadReorgError   uint64 // Number of errors that occurred when decoding the reorg message.
 }
 
 // Wrapper function to increment inserts. If we want to use mutexes later we can easily update all
 // occurrences here.
 func (m *BeaconClientMetrics) IncrementHeadTrackingInserts(inc uint64) {
-	atomic.AddUint64(&m.HeadTrackingInserts, inc)
+	atomic.AddUint64(&m.SlotInserts, inc)
 }
 
 // Wrapper function to increment reorgs. If we want to use mutexes later we can easily update all
 // occurrences here.
 func (m *BeaconClientMetrics) IncrementHeadTrackingReorgs(inc uint64) {
-	atomic.AddUint64(&m.HeadTrackingReorgs, inc)
+	atomic.AddUint64(&m.ReorgInserts, inc)
 }
 
 // Wrapper function to increment known gaps. If we want to use mutexes later we can easily update all
 // occurrences here.
 func (m *BeaconClientMetrics) IncrementHeadTrackingKnownGaps(inc uint64) {
-	atomic.AddUint64(&m.HeadTrackingKnownGaps, inc)
+	atomic.AddUint64(&m.KnownGapsInserts, inc)
 }
 
 // Wrapper function to increment head errors. If we want to use mutexes later we can easily update all

pkg/beaconclient/processevents.go

@@ -23,9 +23,6 @@ import (
 	"strconv"
 
 	log "github.com/sirupsen/logrus"
-	"github.com/vulcanize/ipld-ethcl-indexer/pkg/database/sql"
-	"github.com/vulcanize/ipld-ethcl-indexer/pkg/loghelper"
-	"golang.org/x/sync/errgroup"
 )
 
 // This function will perform the necessary steps to handle a reorg.
@@ -63,19 +60,7 @@ func (bc *BeaconClient) handleHead() {
 
 		log.WithFields(log.Fields{"head": head}).Debug("We are going to start processing the slot.")
 
-		go func(db sql.Database, serverAddress string, slot int, blockRoot string, stateRoot string, previousSlot int, previousBlockRoot string, metrics *BeaconClientMetrics, knownGapsTableIncrement int) {
+		go processHeadSlot(bc.Db, bc.ServerEndpoint, slot, head.Block, head.State, bc.PreviousSlot, bc.PreviousBlockRoot, bc.Metrics, bc.KnownGapTableIncrement)
-			errG := new(errgroup.Group)
-			errG.Go(func() error {
-				err = processHeadSlot(db, serverAddress, slot, blockRoot, stateRoot, previousSlot, previousBlockRoot, metrics, knownGapsTableIncrement)
-				if err != nil {
-					return err
-				}
-				return nil
-			})
-			if err := errG.Wait(); err != nil {
-				loghelper.LogSlotError(strconv.Itoa(slot), err).Error("Unable to process a slot")
-			}
-		}(bc.Db, bc.ServerEndpoint, slot, head.Block, head.State, bc.PreviousSlot, bc.PreviousBlockRoot, bc.Metrics, bc.KnownGapTableIncrement)
 
 		log.WithFields(log.Fields{"head": head.Slot}).Debug("We finished calling processHeadSlot.")
 

pkg/beaconclient/processhistoric.go

@@ -13,6 +13,151 @@
 
 // You should have received a copy of the GNU Affero General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
-// This file will call all the functions to start and stop capturing the head of the beacon chain.
+
+// This file contains all the code to process historic slots.
 
 package beaconclient
+
+import (
+	"context"
+	"fmt"
+	"strconv"
+	"time"
+
+	"github.com/jackc/pgx/v4"
+	log "github.com/sirupsen/logrus"
+	"github.com/vulcanize/ipld-ethcl-indexer/pkg/database/sql"
+	"github.com/vulcanize/ipld-ethcl-indexer/pkg/loghelper"
+)
+
+var (
+	// Get a single highest priority and non-checked out row.
+	getBpEntryStmt string = `SELECT start_slot, end_slot FROM ethcl.historic_process
+	WHERE checked_out=false
+	ORDER BY priority ASC
+	LIMIT 1;`
+	lockBpEntryStmt string = `UPDATE ethcl.historic_process
+	SET checked_out=true
+	WHERE start_slot=$1 AND end_slot=$2;`
+	deleteSlotsEntryStmt string = `DELETE FROM ethcl.historic_process
+	WHERE start_slot=$1 AND end_slot=$2;`
+)
+
+type historicProcessing struct {
+	db      sql.Database
+	metrics *BeaconClientMetrics
+}
+
+// Get a single row of historical slots from the table.
+func (hp historicProcessing) getSlotRange(slotCh chan<- slotsToProcess) []error {
+	return getBatchProcessRow(hp.db, getBpEntryStmt, lockBpEntryStmt, slotCh)
+}
+
+// Remove the table entry.
+func (hp historicProcessing) removeTableEntry(processCh <-chan slotsToProcess) error {
+	return removeRowPostProcess(hp.db, processCh, deleteSlotsEntryStmt)
+}
+
+// Remove the table entry.
+func (hp historicProcessing) handleProcessingErrors(errMessages <-chan batchHistoricError) {
+	for {
+		errMs := <-errMessages
+		writeKnownGaps(hp.db, 1, errMs.slot, errMs.slot, errMs.err, errMs.errProcess, hp.metrics)
+	}
+}
+
+// Process the slot range.
+func processSlotRangeWorker(workCh <-chan int, errCh chan<- batchHistoricError, db sql.Database, serverAddress string, metrics *BeaconClientMetrics) {
+	for slot := range workCh {
+		log.Debug("Handling slot: ", slot)
+		err, errProcess := handleHistoricSlot(db, serverAddress, slot, metrics)
+		errMs := batchHistoricError{
+			err:        err,
+			errProcess: errProcess,
+			slot:       slot,
+		}
+		if err != nil {
+			errCh <- errMs
+		}
+	}
+}
+
+// A wrapper function that insert the start_slot and end_slot from a single row into a channel.
+// It also locks the row by updating the checked_out column.
+// The statement for getting the start_slot and end_slot must be provided.
+// The statement for "locking" the row must also be provided.
+func getBatchProcessRow(db sql.Database, getStartEndSlotStmt string, checkOutRowStmt string, slotCh chan<- slotsToProcess) []error {
+	errCount := make([]error, 0)
+
+	for len(errCount) < 5 {
+		ctx := context.Background()
+
+		// Setup TX
+		tx, err := db.Begin(ctx)
+		if err != nil {
+			errCount = append(errCount, err)
+			continue
+		}
+		defer tx.Rollback(ctx)
+
+		// Query the DB for slots.
+		sp := slotsToProcess{}
+		err = tx.QueryRow(ctx, getStartEndSlotStmt).Scan(&sp.startSlot, &sp.endSlot)
+		if err != nil {
+			if err == pgx.ErrNoRows {
+				time.Sleep(100 * time.Millisecond)
+				continue
+			}
+			loghelper.LogSlotRangeStatementError(strconv.Itoa(sp.startSlot), strconv.Itoa(sp.endSlot), getStartEndSlotStmt, err).Error("Unable to get a row")
+			errCount = append(errCount, err)
+			continue
+		}
+
+		// Checkout the Row
+		res, err := tx.Exec(ctx, checkOutRowStmt, sp.startSlot, sp.endSlot)
+		if err != nil {
+			loghelper.LogSlotRangeStatementError(strconv.Itoa(sp.startSlot), strconv.Itoa(sp.endSlot), checkOutRowStmt, err).Error("Unable to checkout the row")
+			errCount = append(errCount, err)
+			continue
+		}
+		rows, err := res.RowsAffected()
+		if err != nil {
+			loghelper.LogSlotRangeStatementError(strconv.Itoa(sp.startSlot), strconv.Itoa(sp.endSlot), checkOutRowStmt, fmt.Errorf("Unable to determine the rows affected when trying to checkout a row."))
+			errCount = append(errCount, err)
+			continue
+		}
+		if rows > 1 {
+			loghelper.LogSlotRangeStatementError(strconv.Itoa(sp.startSlot), strconv.Itoa(sp.endSlot), checkOutRowStmt, err).WithFields(log.Fields{
+				"rowsReturn": rows,
+			}).Error("We locked too many rows.....")
+			errCount = append(errCount, err)
+			continue
+		}
+		if rows != 1 {
+			loghelper.LogSlotRangeStatementError(strconv.Itoa(sp.startSlot), strconv.Itoa(sp.endSlot), checkOutRowStmt, err).WithFields(log.Fields{
+				"rowsReturn": rows,
+			}).Error("We did not lock a single row.")
+			errCount = append(errCount, err)
+			continue
+		}
+		err = tx.Commit(ctx)
+		if err != nil {
+			loghelper.LogSlotRangeError(strconv.Itoa(sp.startSlot), strconv.Itoa(sp.endSlot), err).Error("Unable commit transactions.")
+			errCount = append(errCount, err)
+			continue
+		}
+		slotCh <- sp
+	}
+	return errCount
+}
+
+// After a row has been processed it should be removed from its appropriate table.
+func removeRowPostProcess(db sql.Database, processCh <-chan slotsToProcess, removeStmt string) error {
+	for {
+		slots := <-processCh
+		_, err := db.Exec(context.Background(), removeStmt, strconv.Itoa(slots.startSlot), slots.endSlot)
+		if err != nil {
+			return err
+		}
+	}
+}

pkg/beaconclient/processslot.go

@@ -78,7 +78,9 @@ type ProcessSlot struct {
 }
 
 // This function will do all the work to process the slot and write it to the DB.
-func processFullSlot(db sql.Database, serverAddress string, slot int, blockRoot string, stateRoot string, previousSlot int, previousBlockRoot string, headOrHistoric string, metrics *BeaconClientMetrics, knownGapsTableIncrement int) error {
+// It will return the error and error process. The error process is used for providing reach detail to the
+// known_gaps table.
+func processFullSlot(db sql.Database, serverAddress string, slot int, blockRoot string, stateRoot string, previousSlot int, previousBlockRoot string, headOrHistoric string, metrics *BeaconClientMetrics, knownGapsTableIncrement int) (error, string) {
 	ps := &ProcessSlot{
 		Slot:           slot,
 		BlockRoot:      blockRoot,
@@ -110,8 +112,7 @@ func processFullSlot(db sql.Database, serverAddress string, slot int, blockRoot
 	})
 
 	if err := g.Wait(); err != nil {
-		writeKnownGaps(ps.Db, 1, ps.Slot, ps.Slot, err, "processSlot", ps.Metrics)
+		return err, "processSlot"
-		return err
 	}
 
 	if ps.HeadOrHistoric == "head" && previousSlot == 0 && previousBlockRoot == "" {
@@ -122,37 +123,35 @@ func processFullSlot(db sql.Database, serverAddress string, slot int, blockRoot
 	blockRootEndpoint := serverAddress + BcBlockRootEndpoint(strconv.Itoa(ps.Slot))
 	dw, err := ps.createWriteObjects(blockRootEndpoint)
 	if err != nil {
-		writeKnownGaps(ps.Db, 1, ps.Slot, ps.Slot, err, "blockRoot", ps.Metrics)
+		return err, "blockRoot"
-		return err
 	}
 	// Write the object to the DB.
 	err = dw.writeFullSlot()
 	if err != nil {
-		writeKnownGaps(ps.Db, 1, ps.Slot, ps.Slot, err, "processSlot", ps.Metrics)
+		return err, "processSlot"
-		return err
 	}
 
 	// Handle any reorgs or skipped slots.
 	headOrHistoric = strings.ToLower(headOrHistoric)
 	if headOrHistoric != "head" && headOrHistoric != "historic" {
-		return fmt.Errorf("headOrHistoric must be either historic or head!")
+		return fmt.Errorf("headOrHistoric must be either historic or head!"), ""
 	}
 	if ps.HeadOrHistoric == "head" && previousSlot != 0 && previousBlockRoot != "" && ps.Status != "skipped" {
 		ps.checkPreviousSlot(previousSlot, previousBlockRoot, knownGapsTableIncrement)
 	}
-	return nil
+	return nil, ""
 }
 
 // Handle a slot that is at head. A wrapper function for calling `handleFullSlot`.
-func processHeadSlot(db sql.Database, serverAddress string, slot int, blockRoot string, stateRoot string, previousSlot int, previousBlockRoot string, metrics *BeaconClientMetrics, knownGapsTableIncrement int) error {
+func processHeadSlot(db sql.Database, serverAddress string, slot int, blockRoot string, stateRoot string, previousSlot int, previousBlockRoot string, metrics *BeaconClientMetrics, knownGapsTableIncrement int) {
-	return processFullSlot(db, serverAddress, slot, blockRoot, stateRoot, previousSlot, previousBlockRoot, "head", metrics, knownGapsTableIncrement)
+	err, errReason := processFullSlot(db, serverAddress, slot, blockRoot, stateRoot, previousSlot, previousBlockRoot, "head", metrics, knownGapsTableIncrement)
+	writeKnownGaps(db, knownGapsTableIncrement, slot, slot, err, errReason, metrics)
 }
 
 // Handle a historic slot. A wrapper function for calling `handleFullSlot`.
-// Commented because of the linter...... LOL
+func handleHistoricSlot(db sql.Database, serverAddress string, slot int, metrics *BeaconClientMetrics) (error, string) {
-//func handleHistoricSlot(db sql.Database, serverAddress string, slot int) error {
+	return processFullSlot(db, serverAddress, slot, "", "", 0, "", "historic", metrics, 1)
-//	return handleFullSlot(db, serverAddress, slot, "", "", 0, "", "historic")
+}
-//}
 
 // Update the SszSignedBeaconBlock and FullSignedBeaconBlock object with their respective values.
 func (ps *ProcessSlot) getSignedBeaconBlock(serverAddress string, vmCh <-chan *dt.VersionedUnmarshaler) error {
@@ -289,10 +288,13 @@ func (ps *ProcessSlot) createWriteObjects(blockRootEndpoint string) (*DatabaseWr
 			blockRoot = ps.BlockRoot
 		} else {
 			var err error
-			blockRoot, err = queryBlockRoot(blockRootEndpoint, strconv.Itoa(ps.Slot))
+			rawBlockRoot, err := ps.FullSignedBeaconBlock.Block().HashTreeRoot()
+			//blockRoot, err = queryBlockRoot(blockRootEndpoint, strconv.Itoa(ps.Slot))
 			if err != nil {
 				return nil, err
 			}
+			blockRoot = "0x" + hex.EncodeToString(rawBlockRoot[:])
+			log.WithFields(log.Fields{"blockRoot": blockRoot}).Debug("Block Root from ssz:")
 		}
 		eth1BlockHash = "0x" + hex.EncodeToString(ps.FullSignedBeaconBlock.Block().Body().Eth1Data().BlockHash)
 	}

pkg/loghelper/logerror.go

@@ -27,9 +27,26 @@ func LogError(err error) *log.Entry {
 	})
 }
 
+// A simple herlper function to log slot and error.
 func LogSlotError(slot string, err error) *log.Entry {
 	return log.WithFields(log.Fields{
 		"err":  err,
 		"slot": slot,
 	})
 }
+
+func LogSlotRangeError(startSlot string, endSlot string, err error) *log.Entry {
+	return log.WithFields(log.Fields{
+		"err":       err,
+		"startSlot": startSlot,
+		"endSlot":   endSlot,
+	})
+}
+func LogSlotRangeStatementError(startSlot string, endSlot string, statement string, err error) *log.Entry {
+	return log.WithFields(log.Fields{
+		"err":          err,
+		"startSlot":    startSlot,
+		"endSlot":      endSlot,
+		"SqlStatement": statement,
+	})
+}