In the 'printchain' command, print transactions as well

cli.go

@@ -64,6 +64,9 @@ func (cli *CLI) printChain() {
 		fmt.Printf("Hash: %x\n", block.Hash)
 		pow := NewProofOfWork(block)
 		fmt.Printf("PoW: %s\n", strconv.FormatBool(pow.Validate()))
+		for _, tx := range block.Transactions {
+			fmt.Println(tx)
+		}
 		fmt.Println()
 
 		if len(block.PrevBlockHash) == 0 {

transaction.go

@@ -7,6 +7,7 @@ import (
 	"encoding/hex"
 	"fmt"
 	"log"
+	"strings"
 )
 
 const subsidy = 10
@@ -23,6 +24,28 @@ func (tx Transaction) IsCoinbase() bool {
 	return len(tx.Vin) == 1 && len(tx.Vin[0].Txid) == 0 && tx.Vin[0].Vout == -1
 }
 
+// String returns a human-readable representation of a transaction
+func (tx Transaction) String() string {
+	var lines []string
+
+	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("    Script: %s", input.ScriptSig))
+	}
+
+	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: %s", output.ScriptPubKey))
+	}
+
+	return strings.Join(lines, "\n")
+}
+
 // SetID sets ID of a transaction
 func (tx Transaction) SetID() {
 	var encoded bytes.Buffer