That's the point. BIP64 specifies such a structure, and you have to scan all that it defines.
If you want to write wallet software that does not have the complexity to deal with just one account, it is not BIP64 compliant. It could try to define its own purpose system, with a hierarchy without accounts in it. I'm not sure this is a very interesting use case, but I like how strict it is. Construction of related chains for multisig addresses is perhaps a better example of a different purpose structure.
On Wednesday, April 23, 2014 7:57:46 PM slush wrote:
> On Wed, Apr 23, 2014 at 9:55 PM, Luke-Jr <luke@dashjr.org> wrote:
> > Any wallet should import all the coins just fine, it just wouldn't *use*
> > any
> > account other than 0. Remember addresses are used to receive bitcoins;
> > once the UTXOs are in the wallet, they are no longer associated with the
> > address or
> > any other details of how they were received.
>
> Wallet don't see UTXO until it scans all branches/accounts on HD node
> import.
Yes, it should scan all possible (under the BIP-defined structure) branches
regardless of which features it supports.
Luke
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