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From: =?UTF-8?B?44Ki44Or44Og44CA44Kr44O844Or44Oo44OP44Oz?= <karl@dglab.com>
Date: Sat, 4 Mar 2017 07:18:50 -0800
Message-ID: <CALJw2w49N273-sJ2cGjX=DncEYDh703S6F_7zupqmDJRsz+QZQ@mail.gmail.com>
To: Luke Dashjr <luke@dashjr.org>, 
	Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>
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Subject: Re: [bitcoin-dev] Currency/exchange rate information API
Precedence: list

I am surprised nothing like this exists already, so am all for the idea.

Maybe I am misunderstanding, but I'm not sure you want to have
thousand separators and other locale stuff in there. All currencies
including USD are often shown in Swedish using space or dot as
thousand separator and comma as decimal separator, e.g. "1.234,56 USD"
or "1 234,56 USD". I.e. this is something that the locale of the
user's environment defines, not something the server should have
opinions about. It is also not ideal to propose a given format based
on the user's locale, as some users have preferences for this (I
personally use US locale for numbers, and a US person who is visiting
Sweden wouldn't want this to suddenly change).

-Kalle.

On Sat, Mar 4, 2017 at 12:27 AM, Luke Dashjr via bitcoin-dev
<bitcoin-dev@lists.linuxfoundation.org> wrote:
> Investigating what it would take to add fiat currency information to Bitcoin
> Knots, I noticed Electrum currently has many implementations, one for each
> exchange rate provider, due to lack of a common format for such data.
>
> Therefore, I put together an initial draft of a BIP that could standardise
> this so wallets (or other software) and exchange rate providers can simply
> interoperate without a lot of overhead reimplementing the same thing many
> ways.
>
> One thing I am unsure about, is that currently this draft requires using XBT
> (as BTC) for Bitcoin amounts. It would seem nicer to use satoshis, but those
> don't really have a pseudo-ISO currency code to fit in nicely...
>
> Current draft here:
>     https://github.com/luke-jr/bips/blob/bip-xchgrate/bip-xchgrate.mediawiki
>
> Thoughts? Anything critical missing? Ways to make the interface better?
>
> Luke
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