diff --git a/.vscode/settings.json b/.vscode/settings.json
index 79f1a1cc0..e4062af53 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -1,8 +1,10 @@
 {
-  "workbench.colorTheme": "Solarized Light",
-  "npm.enableScriptExplorer": true,
-  "window.zoomLevel": 3,
-  "editor.tabSize": 4,
-  "editor.insertSpaces": true,
-  "editor.detectIndentation": true
-}
+    "workbench.colorTheme": "Solarized Light",
+    "npm.enableScriptExplorer": true,
+    "window.zoomLevel": 3,
+    "editor.tabSize": 4,
+    "editor.insertSpaces": true,
+    "editor.detectIndentation": false,
+    "editor.tabCompletion": true,
+  }
+  
\ No newline at end of file
diff --git a/blockchain.go b/blockchain.go
index ca59be522..b71106c3b 100644
--- a/blockchain.go
+++ b/blockchain.go
@@ -1,98 +1,98 @@
 package main
 
 import (
-  "encoding/hex"
+    "encoding/hex"
 )
 
 // Blockchain keeps a sequence of Blocks
 type Blockchain struct {
-  blocks []*Block
+    blocks []*Block
 }
 
 // AddBlock saves provided data as a block in the blockchain
 func (bc *Blockchain) AddBlock(data string) {
-  prevBlock := bc.blocks[len(bc.blocks)-1]
+    prevBlock := bc.blocks[len(bc.blocks)-1]
 
-  // TODO(minhdoan): Parse data.
-  newBlock := NewBlock({}, prevBlock.Hash)
-  bc.blocks = append(bc.blocks, newBlock)
+    // TODO(minhdoan): Parse data.
+    newBlock := NewBlock({}, prevBlock.Hash)
+    bc.blocks = append(bc.blocks, newBlock)
 }
 
 // NewBlockchain creates a new Blockchain with genesis Block
 func NewBlockchain() *Blockchain {
-  return &Blockchain{[]*Block{NewGenesisBlock()}}
+    return &Blockchain{[]*Block{NewGenesisBlock()}}
 }
 
 // FindUnspentTransactions returns a list of transactions containing unspent outputs
 func (bc *Blockchain) FindUnspentTransactions(address string) []Transaction {
-  var unspentTXs []Transaction
-  spentTXOs := make(map[string][]int)
-
-  for index := len(bc.blocks) - 1; index >= 0; index-- {
-    block := bc.blocks[index];
-
-    BreakTransaction:
-    for _, tx := range block.Transactions {
-      txId := hex.EncodeToString(tx.Id)
-
-      idx := -1
-      if spentTXOs[txId] != nil {
-        idx = 0
-      }
-      for outIdx, txOutput  := range tx.txOutput {
-        if idx >= 0 && spentTXOs[txId][idx] == outIdx {
-          idx++
-          continue
+    var unspentTXs []Transaction
+    spentTXOs := make(map[string][]int)
+
+    for index := len(bc.blocks) - 1; index >= 0; index-- {
+        block := bc.blocks[index];
+
+        BreakTransaction:
+        for _, tx := range block.Transactions {
+            txId := hex.EncodeToString(tx.Id)
+
+            idx := -1
+            if spentTXOs[txId] != nil {
+                idx = 0
+            }
+            for outIdx, txOutput  := range tx.txOutput {
+                if idx >= 0 && spentTXOs[txId][idx] == outIdx {
+                    idx++
+                    continue
+                }
+
+                if txOutput.address == address {
+                    unspentTXs = append(unspentTXs, *tx)
+                    continue BreakTransaction
+                }
+            }
         }
-
-        if txOutput.address == address {
-          unspentTXs = append(unspentTXs, *tx)
-          continue BreakTransaction
-        }
-      }
     }
-  }
-  return unspentTXs
+    return unspentTXs
 }
 
 // FindUTXO finds and returns all unspent transaction outputs
 func (bc *Blockchain) FindUTXO(address string) []TXOutput {
-  var UTXOs []TXOutput
-  unspentTXs := bc.FindUnspentTransactions(address)
-
-  for _, tx := range unspentTXs {
-    for _, txOutput := range tx.txOutput {
-      if txOutput.address == address {
-        UTXOs = append(UTXOs, txOutput)
-        break
-      }
+    var UTXOs []TXOutput
+    unspentTXs := bc.FindUnspentTransactions(address)
+
+    for _, tx := range unspentTXs {
+        for _, txOutput := range tx.txOutput {
+            if txOutput.address == address {
+                UTXOs = append(UTXOs, txOutput)
+                break
+            }
+        }
     }
-  }
 
-  return UTXOs
+    return UTXOs
 }
 
 // FindSpendableOutputs finds and returns unspent outputs to reference in inputs
 func (bc *Blockchain) FindSpendableOutputs(address string, amount int) (int, map[string][]int) {
-  unspentOutputs := make(map[string][]int)
-  unspentTXs := bc.FindUnspentTransactions(address)
-  accumulated := 0
+    unspentOutputs := make(map[string][]int)
+    unspentTXs := bc.FindUnspentTransactions(address)
+    accumulated := 0
 
 Work:
-  for _, tx := range unspentTXs {
-    txID := hex.EncodeToString(tx.ID)
-
-    for outIdx, txOutput := range tx.txOutput {
-      if txOutput.address == address && accumulated < amount {
-        accumulated += txOutput.value
-        unspentOutputs[txID] = append(unspentOutputs[txID], outIdx)
-
-        if accumulated >= amount {
-          break Work
+    for _, tx := range unspentTXs {
+        txID := hex.EncodeToString(tx.ID)
+
+        for outIdx, txOutput := range tx.txOutput {
+            if txOutput.address == address && accumulated < amount {
+                accumulated += txOutput.value
+                unspentOutputs[txID] = append(unspentOutputs[txID], outIdx)
+
+                if accumulated >= amount {
+                    break Work
+                }
+            }
         }
-      }
     }
-  }
 
-  return accumulated, unspentOutputs
+    return accumulated, unspentOutputs
 }
diff --git a/transaction.go b/transaction.go
index bbcbe04f4..f37fdc7f4 100644
--- a/transaction.go
+++ b/transaction.go
@@ -1,40 +1,40 @@
 package main
 
 import (
-    "bytes"
-    "crypto/sha256"
-    "encoding/gob"
-    "log"
+	"bytes"
+	"crypto/sha256"
+	"encoding/gob"
+	"log"
 )
 
 // Transaction represents a Bitcoin transaction
 type Transaction struct {
-    id       []byte
-    txInput  []TXInput
-    txOutput []TXOutput
+	id       []byte
+	txInput  []TXInput
+	txOutput []TXOutput
 }
 
 type TXOutput struct {
-    address string
-    value   int
+	address string
+	value   int
 }
 
 type TXInput struct {
-    txId          []byte
-    txOutputIndex int
-    address       string
+	txId          []byte
+	txOutputIndex int
+	address       string
 }
 
 // SetID sets ID of a transaction
 func (tx *Transaction) SetId() {
-    var encoded bytes.Buffer
-    var hash [32]byte
+	var encoded bytes.Buffer
+	var hash [32]byte
 
-    enc := gob.NewEncoder(&encoded)
-    err := enc.Encode(tx)
-    if err != nil {
-        log.Panic(err)
-    }
-    hash = sha256.Sum256(encoded.Bytes())
-    tx.ID = hash[:]
+	enc := gob.NewEncoder(&encoded)
+	err := enc.Encode(tx)
+	if err != nil {
+		log.Panic(err)
+	}
+	hash = sha256.Sum256(encoded.Bytes())
+	tx.ID = hash[:]
 }