feat: add initial implementation of status and transaction pool

blockchain/block.go

@@ -36,7 +36,6 @@ func (b *Block) ToJson() string {
 }
 
 func (b *Block) Hash() string {
-
 	bs, err := json.Marshal(b)
 
 	if err != nil {
@@ -49,3 +48,15 @@ func (b *Block) Hash() string {
 
 	return hex
 }
+
+func (b *Block) AddTransactionToTheBlock(txn *Transaction) {
+	isValid := txn.VerifyTransaction()
+
+	if isValid {
+		txn.Status = constants.STATUS_SUCCESS
+	} else {
+		txn.Status = constants.STATUS_FAILED
+	}
+
+	b.Transactions = append(b.Transactions, txn)
+}

blockchain/blockchain.go

@@ -1,6 +1,10 @@
 package blockchain
 
-import "encoding/json"
+import (
+	"encoding/json"
+
+	"github.com/stinkymonkeyph/gopher-blocks/constants"
+)
 
 type Blockchain struct {
 	TransactionPool []*Transaction `json:"transaction_pool"`
@@ -24,3 +28,8 @@ func (bc *Blockchain) ToJSON() string {
 
 	return string(bbc)
 }
+
+func (bc *Blockchain) AddTransactionToTransactionPool(txn *Transaction) {
+	txn.Status = constants.STATUS_PENDING
+	bc.TransactionPool = append(bc.TransactionPool, txn)
+}

blockchain/transaction.go

@@ -1,12 +1,16 @@
 package blockchain
 
-import "encoding/json"
+import (
+	"encoding/json"
+	"math"
+)
 
 type Transaction struct {
-	From  string `json:"from"`
-	To    string `json:"to"`
-	Value uint64 `json:"value"`
-	Data  []byte `json:"data"`
+	From   string `json:"from"`
+	To     string `json:"to"`
+	Value  uint64 `json:"value"`
+	Data   []byte `json:"data"`
+	Status string `json:"status"`
 }
 
 func NewTransaction(from string, to string, value uint64, data []byte) *Transaction {
@@ -28,3 +32,17 @@ func (t *Transaction) ToJSON() string {
 
 	return string(tb)
 }
+
+func (t *Transaction) VerifyTransaction() bool {
+	if t.Value == 0 {
+		return false
+	}
+
+	if t.Value > math.MaxInt64 {
+		return false
+	}
+
+	// TODO: check signature of transaction here
+
+	return true
+}

constants/constants.go

@@ -3,4 +3,7 @@ package constants
 const (
 	BLOCKCHAIN_NAME = "GopherBlocks"
 	HEX_PREFIX      = "0x"
+	STATUS_SUCCESS  = "success"
+	STATUS_FAILED   = "failed"
+	STATUS_PENDING  = "pending"
 )

main.go

@@ -15,5 +15,4 @@ func main() {
 	block := blockchain.NewBlock("0x0", 0)
 	bc := blockchain.NewBlockchain(block)
 	log.Print(bc.ToJSON())
-
 }