export DB in blockchain

blockchain.go

@@ -19,7 +19,7 @@ const genesisCoinbaseData = "The Times 03/Jan/2009 Chancellor on brink of second
 // Blockchain implements interactions with a DB
 type Blockchain struct {
 	tip []byte
-	db  *bolt.DB
+	DB  *bolt.DB
 }
 
 // CreateBlockchain creates a new blockchain DB
@@ -99,7 +99,7 @@ func NewBlockchain(nodeID string) *Blockchain {
 
 // AddBlock saves the block into the blockchain
 func (bc *Blockchain) AddBlock(block *Block) {
-	err := bc.db.Update(func(tx *bolt.Tx) error {
+	err := bc.DB.Update(func(tx *bolt.Tx) error {
 		b := tx.Bucket([]byte(blocksBucket))
 		blockInDb := b.Get(block.Hash)
 
@@ -199,7 +199,7 @@ func (bc *Blockchain) FindUTXO() map[string]TXOutputs {
 
 // Iterator returns a BlockchainIterat
 func (bc *Blockchain) Iterator() *BlockchainIterator {
-	bci := &BlockchainIterator{bc.tip, bc.db}
+	bci := &BlockchainIterator{bc.tip, bc.DB}
 
 	return bci
 }
@@ -208,7 +208,7 @@ func (bc *Blockchain) Iterator() *BlockchainIterator {
 func (bc *Blockchain) GetBestHeight() int {
 	var lastBlock Block
 
-	err := bc.db.View(func(tx *bolt.Tx) error {
+	err := bc.DB.View(func(tx *bolt.Tx) error {
 		b := tx.Bucket([]byte(blocksBucket))
 		lastHash := b.Get([]byte("l"))
 		blockData := b.Get(lastHash)
@@ -227,7 +227,7 @@ func (bc *Blockchain) GetBestHeight() int {
 func (bc *Blockchain) GetBlock(blockHash []byte) (Block, error) {
 	var block Block
 
-	err := bc.db.View(func(tx *bolt.Tx) error {
+	err := bc.DB.View(func(tx *bolt.Tx) error {
 		b := tx.Bucket([]byte(blocksBucket))
 
 		blockData := b.Get(blockHash)
@@ -277,7 +277,7 @@ func (bc *Blockchain) MineBlock(transactions []*Transaction) *Block {
 		}
 	}
 
-	err := bc.db.View(func(tx *bolt.Tx) error {
+	err := bc.DB.View(func(tx *bolt.Tx) error {
 		b := tx.Bucket([]byte(blocksBucket))
 		lastHash = b.Get([]byte("l"))
 
@@ -294,7 +294,7 @@ func (bc *Blockchain) MineBlock(transactions []*Transaction) *Block {
 
 	newBlock := NewBlock(transactions, lastHash, lastHeight+1)
 
-	err = bc.db.Update(func(tx *bolt.Tx) error {
+	err = bc.DB.Update(func(tx *bolt.Tx) error {
 		b := tx.Bucket([]byte(blocksBucket))
 		err := b.Put(newBlock.Hash, newBlock.Serialize())
 		if err != nil {

cli_createblockchain.go

@@ -10,7 +10,7 @@ func (cli *CLI) createBlockchain(address, nodeID string) {
 		log.Panic("ERROR: Address is not valid")
 	}
 	bc := CreateBlockchain(address, nodeID)
-	defer bc.db.Close()
+	defer bc.DB.Close()
 
 	UTXOSet := UTXOSet{bc}
 	UTXOSet.Reindex()

cli_getbalance.go

@@ -11,7 +11,7 @@ func (cli *CLI) getBalance(address, nodeID string) {
 	}
 	bc := NewBlockchain(nodeID)
 	UTXOSet := UTXOSet{bc}
-	defer bc.db.Close()
+	defer bc.DB.Close()
 
 	balance := 0
 	pubKeyHash := Base58Decode([]byte(address))

cli_printchain.go

@@ -8,7 +8,7 @@ import (
 
 func (cli *CLI) printChain(nodeID string) {
 	bc := NewBlockchain(nodeID)
-	defer bc.db.Close()
+	defer bc.DB.Close()
 
 	bci := bc.Iterator()
 
@@ -34,7 +34,7 @@ func (cli *CLI) printChain(nodeID string) {
 
 func (cli *CLI) printBlock(blockHash, nodeID string) {
 	bc := NewBlockchain(nodeID)
-	defer bc.db.Close()
+	defer bc.DB.Close()
 
 	bci := bc.Iterator()
 

cli_send.go

@@ -15,7 +15,7 @@ func (cli *CLI) send(from, to string, amount int, nodeID string, mineNow bool) {
 
 	bc := NewBlockchain(nodeID)
 	UTXOSet := UTXOSet{bc}
-	defer bc.db.Close()
+	defer bc.DB.Close()
 
 	wallets, err := NewWallets(nodeID)
 	if err != nil {

utxo_set.go

@@ -18,7 +18,7 @@ type UTXOSet struct {
 func (u UTXOSet) FindSpendableOutputs(pubkeyHash []byte, amount int) (int, map[string][]int) {
 	unspentOutputs := make(map[string][]int)
 	accumulated := 0
-	db := u.Blockchain.db
+	db := u.Blockchain.DB
 
 	err := db.View(func(tx *bolt.Tx) error {
 		b := tx.Bucket([]byte(utxoBucket))
@@ -48,7 +48,7 @@ func (u UTXOSet) FindSpendableOutputs(pubkeyHash []byte, amount int) (int, map[s
 // FindUTXO finds UTXO for a public key hash
 func (u UTXOSet) FindUTXO(pubKeyHash []byte) []TXOutput {
 	var UTXOs []TXOutput
-	db := u.Blockchain.db
+	db := u.Blockchain.DB
 
 	err := db.View(func(tx *bolt.Tx) error {
 		b := tx.Bucket([]byte(utxoBucket))
@@ -75,7 +75,7 @@ func (u UTXOSet) FindUTXO(pubKeyHash []byte) []TXOutput {
 
 // CountTransactions returns the number of transactions in the UTXO set
 func (u UTXOSet) CountTransactions() int {
-	db := u.Blockchain.db
+	db := u.Blockchain.DB
 	counter := 0
 
 	err := db.View(func(tx *bolt.Tx) error {
@@ -97,7 +97,7 @@ func (u UTXOSet) CountTransactions() int {
 
 // Reindex rebuilds the UTXO set
 func (u UTXOSet) Reindex() {
-	db := u.Blockchain.db
+	db := u.Blockchain.DB
 	bucketName := []byte(utxoBucket)
 
 	err := db.Update(func(tx *bolt.Tx) error {
@@ -141,7 +141,7 @@ func (u UTXOSet) Reindex() {
 // Update updates the UTXO set with transactions from the Block
 // The Block is considered to be the tip of a blockchain
 func (u UTXOSet) Update(block *Block) {
-	db := u.Blockchain.db
+	db := u.Blockchain.DB
 
 	err := db.Update(func(tx *bolt.Tx) error {
 		b := tx.Bucket([]byte(utxoBucket))