That's a valid concern, but I don't see the conflict here. In order to
recover funds from a wallet conforming to BIPXX, you must have wallet
software that handles BIPXX. Simply making BIPXX backwards compatible with
previously created BIP44 or BIP43 purpose 0 wallets doesn't change this at
all.


Aaron Voisine
co-founder and CEO
breadwallet <http://breadwallet.com>

On Fri, May 13, 2016 at 10:57 AM, Pavol Rusnak <stick@satoshilabs.com>
wrote:

> On 13/05/16 18:59, Aaron Voisine wrote:
> > This scheme is independent of the number of accounts. It works with BIP44
> > as well as BIP43 purpose 0, or any other BIP43 purpose/layout. Instead of
> > overloading the account index to indicate the type of address, you use
> the
> > chain index, which is already being used to indicate what the specific
> > address chain is to be used for, i.e. receive vs change addresses.
>
> I see the advantage here. But there is a major problem here.
>
> We came up with BIP44 so a wallet can claim it is BIP44 compatible and
> you can be 100% sure that you can migrate accounts from one wallet
> implementation to another. This was not previously possible when a
> wallet claimed it is BIP32 compatible.
>
> Now we have a similar problem. When there is a BIP44 wallet, does it
> mean it supports segwit or not? For this reason I would like to see
> another BIPXX for segwit, so a wallet can claim it is BIP44, BIP44+BIPXX
> or BIPXX compatible and you'll know what other wallets are compatible
> with it.
>
> --
> Best Regards / S pozdravom,
>
> Pavol "stick" Rusnak
> SatoshiLabs.com
>