Hi Mike,

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


jp

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

> This isn't usable for SPV wallets unless it has a birthday in it. Otherwise 
> you either need to scan the entire chain (slow) or find a fully indexed copy 
> 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".

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