problem with trezor about coinsplitter

[markblundeberg]

Good point about hiding / disabling. I should just make an error message when they try to open the tool, that explains what is going on. (multisig wallets are also affected)

[markblundeberg]

docs updated - 6882902

[markblundeberg]

hidden menu item thing fixed 3b0ca41

[markblundeberg]

Hey @johneas10, I'd recommend 'combine' and 'redeem with split' for simplicity. Make sure to do this when connected to a BCH server -- if you're connected to BSV server don't worry, it will just reject the transaction and you can try again.

[markblundeberg]

Yep, this won't work on hardware wallets. I had to make a choice of either:

1. having the contract keys derived from wallet keys, which means your splitter coins' keys are fully recoverable with your wallet mnemonic.

2. having random contract keys, which means lost funds in case your computer crashes and/or files become corrupted.

I went with the first option, which excludes watching-only and hardware wallets.

To split your hardware wallet coins, you should make a software wallet to do the splitting, and then send the result (a split coin) into your hardware wallet in order to mix with those unsplit hardware wallet coins.

[markblundeberg]

(That said, I should modify the code a bit so that the menu items don't appear / are disabled, for said wallets.)

[molecular]

damn ;-(

thanks for not doing option 2, that would break reasonable assumption hd/hw wallet users make about the recoverability of their keys.

Is there any way to do this with trezor at all?

What do you suggest hw wallet users do to split coins? Funnel them through a non-hw wallet?

[markblundeberg]

Yes, indirectly:

1. Create a software wallet in Electron Cash -- you can save the mnemonic somewhere low-security since you'll only be storing 1000 sats on this wallet.
2. Open coin splitting tool.
3. Fund! Copy the split contract address bitcoincash:p... and sent 1000 sats to it, using your hardware wallet software. (this Qt label should have selectable text so copy-paste should work.)
4. When it comes time to split, open the software wallet and the splitter tool again -- it should find that 1000 sat utxo that you made.
5. Get a receiving address from your hardware wallet like bitcoincash:qzzzzzzz. Enter that into the 'output address' field of the splitter tool.
6. Spend! This sends a single tiny split coin into your hardware wallet.
7. Sweep (Mix)! Use your hardware wallet software to sweep all coins (including the tiny split coin you just made). The result will be a single large split coin containing your entire wallet balance.

In this way, you never have to move anything but 1000 satoshis out of the hardware wallet.

[molecular]

I see! Awesome, thank you so much for this tool and the info!

Maybe you could put that explanation for hw wallet users into your how to use .md?

Regarding removing menu items or greying them out for hw wallets: removing them would be a bad choice, I think, since users would then not know what's going on. Same with greying out: nothing more infuriating than a grayed-out menu item and no explanation. Can there be tooltips on grayed-out menu items? That way you could maybe link an explanation from there?

[eeston]

Just to confirm, what options should we be selecting from here to spend:

[eeston]

Thanks @markblundeberg

Think that's me sorted now.