Allow Parity as ingest node (#36)

* Upgrade go-ethereum to v1.8

* Add Node Info for parity nodes

* Upgrade start_private_blockchain to use v1.8

pkg/datastore/postgres/repositories/block_repository_test.go

@@ -48,8 +48,8 @@ var _ = Describe("Saving blocks", func() {
 
 	It("saves the attributes of the block", func() {
 		blockNumber := int64(123)
-		gasLimit := int64(1000000)
-		gasUsed := int64(10)
+		gasLimit := uint64(1000000)
+		gasUsed := uint64(10)
 		blockHash := "x123"
 		blockParentHash := "x456"
 		blockNonce := "0x881db2ca900682e9a9"
@@ -57,7 +57,7 @@ var _ = Describe("Saving blocks", func() {
 		extraData := "xextraData"
 		blockTime := int64(1508981640)
 		uncleHash := "x789"
-		blockSize := int64(1000)
+		blockSize := string("1000")
 		difficulty := int64(10)
 		blockReward := float64(5.132)
 		unclesReward := float64(3.580)
@@ -178,7 +178,7 @@ var _ = Describe("Saving blocks", func() {
 	})
 
 	It("saves the attributes associated to a transaction", func() {
-		gasLimit := int64(5000)
+		gasLimit := uint64(5000)
 		gasPrice := int64(3)
 		nonce := uint64(10000)
 		to := "1234567890"

pkg/datastore/postgres/repositories/receipt_repository.go

@@ -37,8 +37,8 @@ func (receiptRepository ReceiptRepository) GetReceipt(txHash string) (core.Recei
 func loadReceipt(receiptsRow *sql.Row) (core.Receipt, error) {
 	var contractAddress string
 	var txHash string
-	var cumulativeGasUsed int64
-	var gasUsed int64
+	var cumulativeGasUsed uint64
+	var gasUsed uint64
 	var stateRoot string
 	var status int