Improve the printchain command

cli_printchain.go

@@ -14,14 +14,14 @@ func (cli *CLI) printChain() {
 	for {
 		block := bci.Next()
 
-		fmt.Printf("Prev. hash: %x\n", block.PrevBlockHash)
-		fmt.Printf("Hash: %x\n", block.Hash)
+		fmt.Printf("============ Block %x ============\n", block.Hash)
+		fmt.Printf("Prev. block: %x\n", block.PrevBlockHash)
 		pow := NewProofOfWork(block)
-		fmt.Printf("PoW: %s\n", strconv.FormatBool(pow.Validate()))
+		fmt.Printf("PoW: %s\n\n", strconv.FormatBool(pow.Validate()))
 		for _, tx := range block.Transactions {
 			fmt.Println(tx)
 		}
-		fmt.Println()
+		fmt.Printf("\n\n")
 
 		if len(block.PrevBlockHash) == 0 {
 			break

transaction.go

@@ -89,21 +89,21 @@ func (tx *Transaction) Sign(privKey ecdsa.PrivateKey, prevTXs map[string]Transac
 func (tx Transaction) String() string {
 	var lines []string
 
-	lines = append(lines, fmt.Sprintf("Transaction %x:", tx.ID))
+	lines = append(lines, fmt.Sprintf("--- Transaction %x:", tx.ID))
 
 	for i, input := range tx.Vin {
 
-		lines = append(lines, fmt.Sprintf("  Input %d:", i))
-		lines = append(lines, fmt.Sprintf("    TXID:      %x", input.Txid))
-		lines = append(lines, fmt.Sprintf("    Out:       %d", input.Vout))
-		lines = append(lines, fmt.Sprintf("    Signature: %x", input.Signature))
-		lines = append(lines, fmt.Sprintf("    PubKey:    %x", input.PubKey))
+		lines = append(lines, fmt.Sprintf("     Input %d:", i))
+		lines = append(lines, fmt.Sprintf("       TXID:      %x", input.Txid))
+		lines = append(lines, fmt.Sprintf("       Out:       %d", input.Vout))
+		lines = append(lines, fmt.Sprintf("       Signature: %x", input.Signature))
+		lines = append(lines, fmt.Sprintf("       PubKey:    %x", input.PubKey))
 	}
 
 	for i, output := range tx.Vout {
-		lines = append(lines, fmt.Sprintf("  Output %d:", i))
-		lines = append(lines, fmt.Sprintf("    Value:  %d", output.Value))
-		lines = append(lines, fmt.Sprintf("    Script: %x", output.PubKeyHash))
+		lines = append(lines, fmt.Sprintf("     Output %d:", i))
+		lines = append(lines, fmt.Sprintf("       Value:  %d", output.Value))
+		lines = append(lines, fmt.Sprintf("       Script: %x", output.PubKeyHash))
 	}
 
 	return strings.Join(lines, "\n")