Change address cannot be restored from backup

[KhangHLe]

1. Create any type of wallet
2. Create a backup immediately
3. Receive payments into an address
4. Spend some (not all) of the funds so that a change address is created
5. Delete wallet (do not backup)
6. Restore from the backup made in step 2

Problem: The receiving address made was restored but the change address is gone and there is no way to get it back manually.

Why is this a problem: The purpose of HD Wallet was so that a single backup can restore all your funds in case of hardware failure or other issues, this can be detrimental if the majority of your funds are in change addresses.

[maraoz]

Hey @ZIONhikari. Sorry to hear you're having problems restoring a backup. Thanks for the detailed explanation on how to reproduce the bug. I'll follow your steps and report back.

1. I created a testnet 1-of-1 in https://copay.io/app
2. done
3. done, sent 0.1 btc from testnet bitcoind
4. done, sent 0.05 btc back to bitcoind, have 0.0499 in change address
5. done
6. done.

wow. you're right! My balance is gone! ping @yemel (who did the address scanning algorithm at import time).
Can you look at this please?

@ZIONhikari don't worry, the change address is part of the HD wallet, so your money is not lost (in case you were using livenet). We need to fix the import algorithm to find all change addresses apparently. Thanks for letting us know!!!

[KhangHLe]

Hey @maraoz, thanks for the reply, luckily I did not lose any livenet money because the wallet sync with your other copayers :)

[maraoz]

Ah, the magic of mutlisig :)
This is a serious issue though, and we'll look into it in depth. Thanks for
reporting

On Sat, Aug 16, 2014 at 4:02 AM, ZionHikari notifications@github.com
wrote:

Hey @maraoz https://github.com/maraoz, thanks for the reply, luckily I
did not lose any livenet money because the wallet sync with your other
copayers :)

Reply to this email directly or view it on GitHub
https://github.com/bitpay/copay/issues/1078#issuecomment-52386000.

[matiu]

on it now.