Add -l/--label-change option to sendpayment.py to automatically label change address

jmclient/jmclient/cli_options.py

@@ -501,6 +501,12 @@ def get_sendpayment_parser():
                       default='',
                       help='specify address to receive change '
                       ', by default use in-wallet address.')
+    parser.add_option('-l',
+                      '--label-change',
+                      type='str',
+                      dest='changelabel',
+                      default='',
+                      help='specify address label for change output')
 
     add_common_options(parser)
     return parser

jmclient/jmclient/taker.py

@@ -3,7 +3,7 @@
 import base64
 import pprint
 import random
-from typing import Any, NamedTuple
+from typing import Any, NamedTuple, Optional
 from twisted.internet import reactor, task
 
 import jmbitcoin as btc
@@ -11,7 +11,8 @@ from jmclient.configure import jm_single, validate_address, get_interest_rate
 from jmbase import get_log, bintohex, hexbin
 from jmclient.support import (calc_cj_fee, fidelity_bond_weighted_order_choose, choose_orders,
                               choose_sweep_orders)
-from jmclient.wallet import estimate_tx_fee, compute_tx_locktime, FidelityBondMixin
+from jmclient.wallet import (estimate_tx_fee, compute_tx_locktime,
+                             FidelityBondMixin, UnknownAddressForLabel)
 from jmclient.podle import generate_podle, get_podle_commitments
 from jmclient.wallet_service import WalletService
 from jmclient.fidelity_bond import FidelityBondProof
@@ -40,8 +41,8 @@ class Taker(object):
         change_amount: Any
         real_cjfee: Any
         utxo_list: Any = None
-        cj_addr: Any = None
+        cj_addr: Optional[str] = None
-        change_addr: Any = None
+        change_addr: Optional[str] = None
 
     def __init__(self,
                  wallet_service,
@@ -51,6 +52,7 @@ class Taker(object):
                  callbacks=None,
                  tdestaddrs=None,
                  custom_change_address=None,
+                 change_label=None,
                  ignored_makers=None):
         """`schedule`` must be a list of tuples: (see sample_schedule_for_testnet
         for explanation of syntax, also schedule.py module in this directory),
@@ -103,6 +105,7 @@ class Taker(object):
         self.order_chooser = order_chooser
         self.max_cj_fee = max_cj_fee
         self.custom_change_address = custom_change_address
+        self.change_label = change_label
 
         #List (which persists between transactions) of makers
         #who have not responded or behaved maliciously at any
@@ -319,6 +322,13 @@ class Taker(object):
             else:
                 try:
                     self.my_change_addr = self.wallet_service.get_internal_addr(self.mixdepth)
+                    if self.change_label:
+                        try:
+                            self.wallet_service.set_address_label(
+                                self.my_change_addr, self.change_label)
+                        except UnknownAddressForLabel:
+                            # ignore, will happen with custom change not part of a wallet
+                            pass
                 except:
                     self.taker_info_callback("ABORT", "Failed to get a change address")
                     return False

jmclient/jmclient/taker_utils.py

@@ -4,12 +4,15 @@ import os
 import sys
 import time
 import numbers
+from typing import Callable, Optional, Union
+
 from jmbase import get_log, jmprint, bintohex, hextobin
 from .configure import jm_single, validate_address, is_burn_destination
 from .schedule import human_readable_schedule_entry, tweak_tumble_schedule,\
     schedule_to_text
 from .wallet import BaseWallet, estimate_tx_fee, compute_tx_locktime, \
-    FidelityBondMixin
+    FidelityBondMixin, UnknownAddressForLabel
+from .wallet_service import WalletService
 from jmbitcoin import make_shuffled_tx, amount_to_str, \
                        PartiallySignedTransaction, CMutableTxOut,\
                        human_readable_transaction
@@ -30,10 +33,16 @@ def get_utxo_scripts(wallet: BaseWallet, utxos: dict) -> list:
         script_types.append(wallet.get_outtype(utxo["address"]))
     return script_types
 
-def direct_send(wallet_service, amount, mixdepth, destination, answeryes=False,
+def direct_send(wallet_service: WalletService, amount: int, mixdepth: int,
-                accept_callback=None, info_callback=None, error_callback=None,
+                destination: str, answeryes: bool = False,
-                return_transaction=False, with_final_psbt=False,
+                accept_callback: Optional[Callable[[str, str, int, int, Optional[str]], bool]] = None,
-                optin_rbf=True, custom_change_addr=None):
+                info_callback: Optional[Callable[[str], None]] = None,
+                error_callback: Optional[Callable[[str], None]] = None,
+                return_transaction: bool = False,
+                with_final_psbt: bool = False,
+                optin_rbf: bool = True,
+                custom_change_addr: Optional[str] = None,
+                change_label: Optional[str] = None) -> Union[bool, str]:
     """Send coins directly from one mixdepth to one destination address;
     does not need IRC. Sweep as for normal sendpayment (set amount=0).
     If answeryes is True, callback/command line query is not performed.
@@ -211,6 +220,12 @@ def direct_send(wallet_service, amount, mixdepth, destination, answeryes=False,
                                            custom_change_addr)
                 if not accepted:
                     return False
+        if change_label:
+            try:
+                wallet_service.set_address_label(change_addr, change_label)
+            except UnknownAddressForLabel:
+                # ignore, will happen with custom change not part of a wallet
+                pass
         if jm_single().bc_interface.pushtx(tx.serialize()):
             txid = bintohex(tx.GetTxid()[::-1])
             successmsg = "Transaction sent: " + txid

scripts/sendpayment.py

@@ -250,9 +250,11 @@ def main():
 
     if options.makercount == 0 and not bip78url:
         tx = direct_send(wallet_service, amount, mixdepth, destaddr,
-                         options.answeryes, with_final_psbt=options.with_psbt,
+                         options.answeryes,
+                         with_final_psbt=options.with_psbt,
                          optin_rbf=not options.no_rbf,
-                         custom_change_addr=custom_change)
+                         custom_change_addr=custom_change,
+                         change_label=options.changelabel)
         if options.with_psbt:
             log.info("This PSBT is fully signed and can be sent externally for "
                      "broadcasting:")
@@ -364,7 +366,8 @@ def main():
                       order_chooser=chooseOrdersFunc,
                       max_cj_fee=maxcjfee,
                       callbacks=(filter_orders_callback, None, taker_finished),
-                      custom_change_address=custom_change)
+                      custom_change_address=custom_change,
+                      change_label=options.changelabel)
     clientfactory = JMClientProtocolFactory(taker)
 
     if jm_single().config.get("BLOCKCHAIN", "network") == "regtest":