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From: Thomas Voegtlin <thomasv@electrum.org>
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Date: Thu, 25 Aug 2016 09:56:17 +0200
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Subject: Re: [bitcoin-dev] BIP Status updates (including to Active/Final
Status) - BIP 39, BIP 43, BIP 44, BIP 67, BIP 111, BIP 125, BIP 130
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From: Thomas Voegtlin <thomasv@electrum.org>
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Subject: Re: [bitcoin-dev] BIP Status updates (including to Active/Final
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Le 25/08/2016 =E0 09:39, Jonas Schnelli via bitcoin-dev a =E9crit :
> (I think this case if not completely unrealistic):
>=20
> What would happen, if a user gave out 21 addresses, then address0 had
> receive funds in +180 days after generation where address21 had receive=
> funds immediately (all other addresses never received a tx).
>=20
> In a scan, address0 would be detected at <address-birthday>+180 days
> which would trigger the resize+20 of the address-lookup-window, but, we=
> would require to go back 180day in order to detect received transaction=
> of address21 (new lookup-window) in that case.
>=20
> Or do I misunderstand something?
>=20
>=20
That case is not unrealistic; a merchant might generate addresses that
are beyond their gap limit, and orders get filled at a later date.
In that case you will not get the same result when restoring your wallet
in a block-scanning wallet and in Electrum.
The lack of consideration for these cases is another issue with BIP44.
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