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Date: Tue, 21 Mar 2017 15:14:54 -0400
From: Peter Todd <pete@petertodd.org>
To: Andreas Schildbach <andreas@schildbach.de>,
Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>
Message-ID: <20170321191454.GA17834@savin.petertodd.org>
References: <CAPg+sBh0sFA7b6a+48Oojwy655GB9W6Th8JiCpd+2ruQjPev8Q@mail.gmail.com>
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Subject: Re: [bitcoin-dev] A BIP proposal for segwit addresses
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On Tue, Mar 21, 2017 at 05:16:30PM +0100, Andreas Schildbach via bitcoin-de=
v wrote:
> Why use Base 32 when the QR code alphanumeric mode allows 44 characters?
> In Bitcoin Wallet, I use Base 43 (alphabet:
> "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ$*+-./:") for most efficient QR
> code encoding. I only leave out the space character because it gets
> replaced by "+" in URLs.
Doing that only makes addresses a few % shorter, at the cost of significant
downsides. For example, not everyone knows what those additional characters
are called, particularly for non-English-speaking users. Non-alphanumeric
characters also complicate using the addresses in a variety of contexts ('/'
in particularly isn't valid in filenames).
I'd suggest you review the "Rational" section of the BIP for more details:
https://github.com/sipa/bech32/blob/master/bip-witaddr.mediawiki#rationale
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https://petertodd.org 'peter'[:-1]@petertodd.org
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