final assignment solution

main.go

@@ -314,6 +314,30 @@ func srlzBhead(bh *BlockHeader) []byte {
 	return serlzd
 }
 
+func isSegWitTransaction(tx *Transaction) bool {
+	for _, vin := range tx.Vin {
+		if len(vin.Witness) > 0 {
+			return true
+		}
+	}
+	return false
+}
+
+func calculateTxID(serializedTx []byte) string {
+	hash := doubleHash(serializedTx)
+	reversedHash := rb(hash)
+	return hex.EncodeToString(reversedHash)
+}
+
+func calculateMerkleRoot(txIDs []string) string {
+	merkleTree := merkTree(txIDs)
+	return hex.EncodeToString(merkleTree.Data)
+}
+
+func mineBlock(header *BlockHeader) bool {
+	return proofOfWork(header)
+}
+
 func SegWitSerialize(tx *Transaction) []byte {
 	var serlzd []byte
 	serlzd = append(serlzd, u32ToB(tx.Version)...)
@@ -351,30 +375,6 @@ func SegWitSerialize(tx *Transaction) []byte {
 	return serlzd
 }
 
-func isSegWitTransaction(tx *Transaction) bool {
-	for _, vin := range tx.Vin {
-		if len(vin.Witness) > 0 {
-			return true
-		}
-	}
-	return false
-}
-
-func calculateTxID(serializedTx []byte) string {
-	hash := doubleHash(serializedTx)
-	reversedHash := rb(hash)
-	return hex.EncodeToString(reversedHash)
-}
-
-func calculateMerkleRoot(txIDs []string) string {
-	merkleTree := merkTree(txIDs)
-	return hex.EncodeToString(merkleTree.Data)
-}
-
-func mineBlock(header *BlockHeader) bool {
-	return proofOfWork(header)
-}
-
 func writeBlockData(header BlockHeader, coinbaseTx *Transaction, txIDs []string) {
 	outputF, _ := os.Create("output.txt")
 	defer outputF.Close()