add transaction, util, utxo

block.go

@@ -7,7 +7,12 @@ import (
 	"time"
 )
 
-// Block keeps block headers
+// Constants
+const (
+	TOTAL_COINS = 21000000
+)
+
+// Block keeps block headers.
 type Block struct {
 	Timestamp     int64
 	utxoPool      []UTXOPool
@@ -15,7 +20,7 @@ type Block struct {
 	Hash          []byte
 }
 
-//SetHash calculates and sets block hash
+//SetHash calculates and sets block hash.
 func (b *Block) SetHash() {
 	timestamp := []byte(strconv.FormatInt(b.Timestamp, 10))
 	// headers := bytes.Join([][]byte{b.PrevBlockHash, b.Data, timestamp}, []byte{})
@@ -25,7 +30,7 @@ func (b *Block) SetHash() {
 	b.Hash = hash[:]
 }
 
-// NewBlock creates and returns Block
+// NewBlock creates and returns Block.
 func NewBlock(utxoPool []UTXOPool, prevBlockHash []byte) *Block {
 
 	block := &Block{time.Now().Unix(), utxoPool, prevBlockHash, []byte{}}
@@ -33,7 +38,10 @@ func NewBlock(utxoPool []UTXOPool, prevBlockHash []byte) *Block {
 	return block
 }
 
-// NewGenesisBlock creates and returns genesis Block
+// NewGenesisBlock creates and returns genesis Block.
 func NewGenesisBlock() *Block {
-	return NewBlock([]UTXOPool{}, []byte{})
+	genesisUTXOPool := UTXOPool{}
+	genesisUTXOPool.utxos["genesis"] = TOTAL_COINS
+
+	return NewBlock(genesisUTXOPool, []byte{})
 }

transaction.go

@@ -5,19 +5,32 @@ import (
 	"crypto/sha256"
 	"encoding/gob"
 	"log"
+	"strconv"
 	"strings"
 )
 
-const subsidy = 10
-
 // Transaction represents a Bitcoin transaction
 type Transaction struct {
 	ID            []byte
-	data string
+	inputAddresss []string
+	outputAddress []string
+	value         []int
 }
 
-func (tx *Transaction) Parse() {
+func (tx *Transaction) Parse(data string) {
-	strings.Split("a,b,c", ",")
+	items := strings.Split(data, ",")
+	for _, value := range items {
+		pair := strings.Split(value, " ")
+		if len(pair) == 3 {
+			intValue, err := strconv.Atoi(pair[2])
+			if err != nil {
+				tx.inputAddress = append(tx.inputAddresss, strings.Trim(pair[0]))
+				tx.outputAddress = append(tx.outputAddress, strings.Trim(pair[1]))
+				tx.value = append(tx.value, intValue)
+			}
+		}
+	}
+	return res
 }
 
 // SetID sets ID of a transaction

utils.go

@@ -57,9 +57,9 @@ func ConvertIntoMap(data string) map[string]int {
 	var res = map[string]int
 	items := strings.Split(data, ",")
 	for _, value := range items {
-		pair := strings.Split(value, ":")
+		pair := strings.Split(value, " ")
-		if len(pair) == 2 {
+		if len(pair) == 3 {
-			intValue, err := strconv.Atoi(pair[1])
+			intValue, err := strconv.Atoi(pair[2])
 			if err != nil {
 				pair[0] = strings.Trim(pair[0])
 				res[pair[0]] = intValue