[enh] #27: add transaction prompt confirmation with tx summary.

• add -y and --yes options for automated transactions to bypass this prompt.

src/commands.py

@@ -212,7 +212,10 @@ def cmd_transaction(ep, c):
     else:
         outputBackChange = None
         
-    generate_and_send_transaction(ep, seed, amount, output, comment, allSources, outputBackChange)
+    if c.contains_switches('yes') or c.contains_switches('y') or \
+            input("Do you confirm sending {} {} from {} to {} with \"{}\" as comment? [yes/no]: "\
+            .format(amount, get_current_block(ep)["currency"], get_publickey_from_seed(seed), output, comment)) == "yes":
+        generate_and_send_transaction(ep, seed, amount, output, comment, allSources, outputBackChange)
 
 
 def show_amount_from_pubkey(ep, pubkey):