tests: message signing

lib/bitcoin.py

@@ -583,6 +583,10 @@ def verify_message(address, sig, message):
         print_error("Verification error: {0}".format(e))
         return False
 
+def sign_message_with_wif_privkey(sec, message):
+    key = regenerate_key(sec)
+    compressed = is_compressed(sec)
+    return key.sign_message(message, compressed)
 
 def encrypt_message(message, pubkey):
     return EC_KEY.encrypt_message(message, bfh(pubkey))