<p dir="ltr">Bitcoinj already has such chain id's and we use standard Java style reverse DNS names: org.bitcoin.main, etc. If we want a more global naming system that seems like a good compromise between uniqueness and readability.</p>
<div class="gmail_quote">On 20 May 2013 19:45, "Jeff Garzik" <<a href="mailto:jgarzik@exmulti.com">jgarzik@exmulti.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
On Mon, May 20, 2013 at 7:59 PM, Mark Friedenbach <<a href="mailto:mark@monetize.io">mark@monetize.io</a>> wrote:<br>
> So as to remain reasonably compliant with RFC 4122, I recommend that we<br>
> use Version 4 (random) UUIDs, with the random bits extracted from the<br>
> double-SHA256 hash of the genesis block of the chain. (For colored<br>
> coins, the colored coin definition transaction would be used instead,<br>
> but I will address that in a separate proposal and will say just one<br>
> thing about it: adopting this method for identifying chains/coins will<br>
> greatly assist in adopting the payment protocol to colored coins.)<br>
<br>
This proposal seems closer to Version 5 than Version 4, in spirit.<br>
But given that useful content may be deduced from UUID, it is not<br>
truly applicable to either. A bitcoin-specific version 6, if you<br>
will.<br>
<br>
<br>
> And some example chain identifiers:<br>
><br>
> mainnet: UUID('6fe28c0a-b6f1-4372-81a6-a246ae63f74f')<br>
> testnet3: UUID('43497fd7-f826-4571-88f4-a30fd9cec3ae')<br>
> namecoin: UUID('70c7a9f0-a2fb-4d48-a635-a70d5b157c80')<br>
<br>
Note that, as this example unintentionally implies, humans are going<br>
to want a side-by-side mapping /anyway/, just to make it readable and<br>
usable to humans.<br>
<br>
Almost all useful multi-chain software will require a readable<br>
shortname string anyway, the thing this proposal wishes to avoid.<br>
<br>
--<br>
Jeff Garzik<br>
exMULTI, Inc.<br>
<a href="mailto:jgarzik@exmulti.com">jgarzik@exmulti.com</a><br>
<br>
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