From: Jonas Schnelli <dev@jonasschnelli.ch>
Message-Id: <4FDEA4E2-F96D-4A2B-BE6C-04808CFEC74B@jonasschnelli.ch>
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Date: Mon, 19 Jun 2017 18:30:18 +0200
In-Reply-To: <2778650.T23JsbTI1Y@strawberry>
To: Tom Zander <tomz@freedommail.ch>
References: <CAO3Pvs8ccTkgrecJG6KFbBW+9moHF-FTU+4qNfayeE3hM9uRrg@mail.gmail.com>
	<55482016.LADLl5KXAH@strawberry>
	<4052F361-966C-4817-9779-146D4B43D1FE@jonasschnelli.ch>
	<2778650.T23JsbTI1Y@strawberry>
Cc: bitcoin-dev@lists.linuxfoundation.org
Subject: Re: [bitcoin-dev] BIP Proposal: Compact Client Side Filtering for
 Light Clients
Precedence: list


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>>=20
>> I think many users would be willing ...
>> a) =E2=80=A6 to trade higher privacy (using client side filtering) =
for not having
>> the =E2=80=9Eincoming transaction=E2=80=9C feature b) =E2=80=93 if =
they want 0-conf =E2=80=93 to fetch
>> all inved transactions
>=20
> You seem to misunderstand the usecase.
> If you send me a transaction, both of use are using our phones, then I =
need
> to be able to have immediate feedback on the transaction being =
broadcast on
> the network.
> This is not about zero-conf, this is simple seeing what is happening =
while
> it is happening.
>=20
> Additionally, when the transaction that is meant for my wallet is =
broadcast,
> I want my SPV wallet to parse and check the actual transaction.
> It is not just to see that *something* was actually send, but also to =
be
> able to see how much is being paid to me. Maybe If the transaction is =
marked
> as RBF-able, etc.
>=20
> Really basic usability: provide information to your users when you =
can,
> should they want to, and by default on.

I see this use case.
But I did receive bank wire transfers for the last decades without =
_immediately_ knowing that someone sent funds to me.
I personally would ALWAYS trade the higher bandwidth consumption (300MB =
mempool filtering) or slower notification time (maybe ~1h) for =
preserving privacy.
I agree, there are use cases where you want immediate notification, =
those use cases could probably be solved by not trowing away privacy =
(=E2=80=9Eparsing=E2=80=9C all transactions and running in the =
background).

/jonas

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