Remove pubsub and replace w/ polling head of chain (#122)

* Rename geth package structs to not be prefaced with package name

* No longer need to dump schema since Travis uses migrate

* Rearrange history package

* Removed double request for receipt from block rewards

* Remove Listener + Observers and Replace w/ Polling Head

* Potential Short term Issue w/ Infura (ignore these tests for now)

cmd/get_logs/main.go

@@ -35,7 +35,7 @@ func main() {
 	flag.Parse()
 
 	config := cmd.LoadConfig(*environment)
-	blockchain := geth.NewGethBlockchain(config.Client.IPCPath)
+	blockchain := geth.NewBlockchain(config.Client.IPCPath)
 	repository := cmd.LoadPostgres(config.Database, blockchain.Node())
 
 	lastBlockNumber := blockchain.LastBlock().Int64()

cmd/populate_blocks/main.go

@@ -15,7 +15,7 @@ func main() {
 	startingBlockNumber := flag.Int("starting-number", -1, "First block to fill from")
 	flag.Parse()
 	config := cmd.LoadConfig(*environment)
-	blockchain := geth.NewGethBlockchain(config.Client.IPCPath)
+	blockchain := geth.NewBlockchain(config.Client.IPCPath)
 	repository := cmd.LoadPostgres(config.Database, blockchain.Node())
 	numberOfBlocksCreated := history.PopulateMissingBlocks(blockchain, repository, int64(*startingBlockNumber))
 	fmt.Printf("Populated %d blocks", numberOfBlocksCreated)

cmd/run/main.go

@@ -1,30 +1,34 @@
 package main
 
 import (
-	"fmt"
-
 	"flag"
 
+	"time"
+
+	"os"
+
 	"github.com/8thlight/vulcanizedb/cmd"
-	"github.com/8thlight/vulcanizedb/pkg/blockchain_listener"
-	"github.com/8thlight/vulcanizedb/pkg/core"
 	"github.com/8thlight/vulcanizedb/pkg/geth"
-	"github.com/8thlight/vulcanizedb/pkg/observers"
+	"github.com/8thlight/vulcanizedb/pkg/history"
+)
+
+const (
+	pollingInterval = 7 * time.Second
 )
 
 func main() {
+	ticker := time.NewTicker(pollingInterval)
+	defer ticker.Stop()
+
 	environment := flag.String("environment", "", "Environment name")
 	flag.Parse()
 	config := cmd.LoadConfig(*environment)
-	fmt.Printf("Creating Geth Blockchain to: %s\n", config.Client.IPCPath)
-	blockchain := geth.NewGethBlockchain(config.Client.IPCPath)
+	blockchain := geth.NewBlockchain(config.Client.IPCPath)
 	repository := cmd.LoadPostgres(config.Database, blockchain.Node())
-	listener := blockchain_listener.NewBlockchainListener(
-		blockchain,
-		[]core.BlockchainObserver{
-			observers.BlockchainLoggingObserver{},
-			observers.NewBlockchainDbObserver(repository),
-		},
-	)
-	listener.Start()
+	validator := history.NewBlockValidator(blockchain, repository, 15)
+
+	for range ticker.C {
+		window := validator.ValidateBlocks()
+		validator.Log(os.Stdout, window)
+	}
 }

cmd/show_contract_summary/main.go

@@ -18,7 +18,7 @@ func main() {
 	_blockNumber := flag.Int64("block-number", -1, "Block number of summary")
 	flag.Parse()
 	config := cmd.LoadConfig(*environment)
-	blockchain := geth.NewGethBlockchain(config.Client.IPCPath)
+	blockchain := geth.NewBlockchain(config.Client.IPCPath)
 	repository := cmd.LoadPostgres(config.Database, blockchain.Node())
 	blockNumber := cmd.RequestedBlockNumber(_blockNumber)
 

cmd/vulcanize_db/main.go

@@ -6,71 +6,45 @@ import (
 	"time"
 
 	"os"
-	"text/template"
 
 	"github.com/8thlight/vulcanizedb/cmd"
-	"github.com/8thlight/vulcanizedb/pkg/blockchain_listener"
 	"github.com/8thlight/vulcanizedb/pkg/core"
 	"github.com/8thlight/vulcanizedb/pkg/geth"
 	"github.com/8thlight/vulcanizedb/pkg/history"
-	"github.com/8thlight/vulcanizedb/pkg/observers"
 	"github.com/8thlight/vulcanizedb/pkg/repositories"
 )
 
-const windowTemplate = `Validating Existing Blocks
-|{{.LowerBound}}|-- Validation Window --|{{.UpperBound}}| {{.MaxBlockNumber}}(HEAD)
-
-`
-
 const (
-	windowSize      = 24
-	pollingInterval = 10 * time.Second
+	pollingInterval = 7 * time.Second
 )
 
-func createListener(blockchain *geth.GethBlockchain, repository repositories.Postgres) blockchain_listener.BlockchainListener {
-	listener := blockchain_listener.NewBlockchainListener(
-		blockchain,
-		[]core.BlockchainObserver{
-			observers.BlockchainLoggingObserver{},
-			observers.NewBlockchainDbObserver(repository),
-		},
-	)
-	return listener
-}
-
-func validateBlocks(blockchain *geth.GethBlockchain, repository repositories.Postgres, windowSize int, windowTemplate *template.Template) {
-	window := history.UpdateBlocksWindow(blockchain, repository, windowSize)
-	repository.SetBlocksStatus(blockchain.LastBlock().Int64())
-	windowTemplate.Execute(os.Stdout, window)
+func backFillAllBlocks(blockchain core.Blockchain, repository repositories.Postgres, missingBlocksPopulated chan int) {
+	go func() {
+		missingBlocksPopulated <- history.PopulateMissingBlocks(blockchain, repository, 0)
+	}()
 }
 
 func main() {
-	parsedWindowTemplate := template.Must(template.New("window").Parse(windowTemplate))
 	ticker := time.NewTicker(pollingInterval)
 	defer ticker.Stop()
 
 	environment := flag.String("environment", "", "Environment name")
 	flag.Parse()
 	config := cmd.LoadConfig(*environment)
-	blockchain := geth.NewGethBlockchain(config.Client.IPCPath)
+	blockchain := geth.NewBlockchain(config.Client.IPCPath)
 	repository := cmd.LoadPostgres(config.Database, blockchain.Node())
-	listner := createListener(blockchain, repository)
-	go listner.Start()
-	defer listner.Stop()
+	validator := history.NewBlockValidator(blockchain, repository, 15)
 
 	missingBlocksPopulated := make(chan int)
-	go func() {
-		missingBlocksPopulated <- history.PopulateMissingBlocks(blockchain, repository, 0)
-	}()
+	go backFillAllBlocks(blockchain, repository, missingBlocksPopulated)
 
-	for range ticker.C {
-		validateBlocks(blockchain, repository, windowSize, parsedWindowTemplate)
+	for {
 		select {
+		case <-ticker.C:
+			window := validator.ValidateBlocks()
+			validator.Log(os.Stdout, window)
 		case <-missingBlocksPopulated:
-			go func() {
-				missingBlocksPopulated <- history.PopulateMissingBlocks(blockchain, repository, 0)
-			}()
-		default:
+			go backFillAllBlocks(blockchain, repository, missingBlocksPopulated)
 		}
 	}
 }

cmd/watch_contract/main.go

@@ -16,7 +16,7 @@ func main() {
 
 	contractAbiString := cmd.GetAbi(*abiFilepath, *contractHash)
 	config := cmd.LoadConfig(*environment)
-	blockchain := geth.NewGethBlockchain(config.Client.IPCPath)
+	blockchain := geth.NewBlockchain(config.Client.IPCPath)
 	repository := cmd.LoadPostgres(config.Database, blockchain.Node())
 	watchedContract := core.Contract{
 		Abi:  contractAbiString,