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From: Jean-Paul Kogelman <jeanpaulkogelman@me.com>
Date: Mon, 22 Jul 2013 07:33:34 -0700
To: Mike Hearn <mike@plan99.net>
Cc: Bitcoin Dev <bitcoin-development@lists.sourceforge.net>
Subject: Re: [Bitcoin-development] [RFC] Proposal: Base58 encoded HD Wallet
 master seed with optional encryption
Precedence: list

Hi Mike,

I had a similar request on the forums. I suggested adding either a 2 byte 'w=
eeks since genesis' or 'months since genesis', but starting from spec birth w=
orks too. Would either of those work for you?


jp

On Jul 22, 2013, at 6:14 AM, Mike Hearn <mike@plan99.net> wrote:

> This isn't usable for SPV wallets unless it has a birthday in it. Otherwis=
e you either need to scan the entire chain (slow) or find a fully indexed co=
py of the block chain (expensive, more centralised). Just add a UNIX time as=
 an extra 4 bytes, or if you want to save a few characters then use a uint16=
 that represents "days since birth of this specification".