Block categorization (#110)

* Add block categorization (is_final=)

* Add godo task for vulcanizeDB (Example of how everything could work together)

* Add unique constraint on block_number and node

* Add index on block_id for transactions_table

* Add node_id index on blocks table

* Sort transactions returned from FindBlock by tx_hash

* lowercase tx_to, tx_from like etherscan

pkg/geth/geth_block_to_core_block.go

@@ -1,6 +1,8 @@
 package geth
 
 import (
+	"strings"
+
 	"github.com/8thlight/vulcanizedb/pkg/core"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/hexutil"
@@ -39,8 +41,8 @@ func gethTransToCoreTrans(transaction *types.Transaction, from *common.Address)
 		Hash:     transaction.Hash().Hex(),
 		Data:     transaction.Data(),
 		Nonce:    transaction.Nonce(),
-		To:       addressToHex(transaction.To()),
-		From:     addressToHex(from),
+		To:       strings.ToLower(addressToHex(transaction.To())),
+		From:     strings.ToLower(addressToHex(from)),
 		GasLimit: transaction.Gas().Int64(),
 		GasPrice: transaction.GasPrice().Int64(),
 		Value:    transaction.Value().Int64(),

pkg/geth/geth_block_to_core_block_test.go

@@ -53,6 +53,7 @@ var _ = Describe("Conversion of GethBlock to core.Block", func() {
 		Expect(gethBlock.Size).To(Equal(block.Size().Int64()))
 		Expect(gethBlock.Time).To(Equal(time))
 		Expect(gethBlock.UncleHash).To(Equal(block.UncleHash().Hex()))
+		Expect(gethBlock.IsFinal).To(BeFalse())
 	})
 
 	Describe("the converted transations", func() {

pkg/geth/geth_blockchain.go

@@ -25,7 +25,7 @@ type GethBlockchain struct {
 
 func (blockchain *GethBlockchain) GetLogs(contract core.Contract, blockNumber *big.Int) ([]core.Log, error) {
 	if blockNumber == nil {
-		blockNumber = blockchain.latestBlock()
+		blockNumber = blockchain.LastBlock()
 	}
 	contractAddress := common.HexToAddress(contract.Hash)
 	fc := ethereum.FilterQuery{
@@ -80,7 +80,7 @@ func (blockchain *GethBlockchain) StopListening() {
 	blockchain.newHeadSubscription.Unsubscribe()
 }
 
-func (blockchain *GethBlockchain) latestBlock() *big.Int {
+func (blockchain *GethBlockchain) LastBlock() *big.Int {
 	block, _ := blockchain.client.HeaderByNumber(context.Background(), nil)
 	return block.Number
 }