Add data in main

core/main.go

@@ -2,16 +2,26 @@ package main
 
 import (
 	"encoding/hex"
+	"encoding/json"
 	"fmt"
 )
 
+// Transaction struct
+type Transaction struct {
+	Sender   string
+	Receiver string
+	Amount   int
+}
+
 func main() {
 	blockchain := newBlockchain()
 
-	block := newBlock(blockchain.blocks[0].Hash, []byte("I am the first block!!"))
+	data, _ := json.Marshal(Transaction{Sender: "foo", Receiver: "bar", Amount: 100})
+	block := newBlock(blockchain.blocks[0].Hash, data)
 	blockchain.addBlock(block)
 
-	block = newBlock(blockchain.blocks[1].Hash, []byte("This is number two"))
+	data2, _ := json.Marshal(Transaction{Sender: "bar", Receiver: "baz", Amount: 5000})
+	block = newBlock(blockchain.blocks[1].Hash, data2)
 	blockchain.addBlock(block)
 
 	for i := 0; i < len(blockchain.blocks); i++ {
@@ -20,7 +30,9 @@ func main() {
 		fmt.Println("Block " + string(i))
 		fmt.Println(hex.EncodeToString(block.PreviousHash))
 		fmt.Println(hex.EncodeToString(block.Hash))
-		fmt.Println()
+
+		data := string(block.Data)
+		fmt.Println("Data: " + data)
 	}
 
 }