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. On 20 May 2013 19:45, "Jeff Garzik" wrote: > On Mon, May 20, 2013 at 7:59 PM, Mark Friedenbach > wrote: > > So as to remain reasonably compliant with RFC 4122, I recommend that we > > use Version 4 (random) UUIDs, with the random bits extracted from the > > double-SHA256 hash of the genesis block of the chain. (For colored > > coins, the colored coin definition transaction would be used instead, > > but I will address that in a separate proposal and will say just one > > thing about it: adopting this method for identifying chains/coins will > > greatly assist in adopting the payment protocol to colored coins.) > > This proposal seems closer to Version 5 than Version 4, in spirit. > But given that useful content may be deduced from UUID, it is not > truly applicable to either. A bitcoin-specific version 6, if you > will. > > > > And some example chain identifiers: > > > > mainnet: UUID('6fe28c0a-b6f1-4372-81a6-a246ae63f74f') > > testnet3: UUID('43497fd7-f826-4571-88f4-a30fd9cec3ae') > > namecoin: UUID('70c7a9f0-a2fb-4d48-a635-a70d5b157c80') > > Note that, as this example unintentionally implies, humans are going > to want a side-by-side mapping /anyway/, just to make it readable and > usable to humans. > > Almost all useful multi-chain software will require a readable > shortname string anyway, the thing this proposal wishes to avoid. > > -- > Jeff Garzik > exMULTI, Inc. > jgarzik@exmulti.com > > > ------------------------------------------------------------------------------ > Try New Relic Now & We'll Send You this Cool Shirt > New Relic is the only SaaS-based application performance monitoring service > that delivers powerful full stack analytics. Optimize and monitor your > browser, app, & servers with just a few lines of code. Try New Relic > and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_may > _______________________________________________ > Bitcoin-development mailing list > Bitcoin-development@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/bitcoin-development >