Actually gap in parallel branches already fails with BIP64 as it starts with 
m/64'/…. without having m/63'


Tamas Blummer

On 26.04.2014, at 12:59, Tamas Blummer <> wrote:

> Yes, it is expensive but possible to discover any funds associated with a 
> seed, provided there are set limits to:
> 1. gap of address use (e.g. 20)
> 2. depth of hierarchy (e.g. 6)
> 3. gap in use of parallel branches (e.g. 0) 
> I would pick the limits in brackets above. 
> Regards,
> Tamas Blummer
> On 26.04.2014, at 12:48, Tier Nolan <> wrote:
>> Maybe the solution is to have a defined way to import an unknown wallet?
>> This means that the gap space and a search ordering needs to be defined.
>> Given a blockchain and a root seed, it should be possible to find all the 
>> addresses for that root seed.
>> The hierarchy that the wallet actually uses could be anything.

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