Pushing genesis back to 0

Technical questions about the Ripple API, the protocol, etc.
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Re: Pushing genesis back to 0

Postby donch » Tue Mar 11, 2014 11:37 pm

Sukrim wrote:
JoelKatz wrote:The problem is that it will be hard for us to know if we're right. We can build a ledger 0, but how will we know if it's the right one? We don't know the hash of the genesis ledger.

We can create a ledger 0, use its hash for ledger 1, use its hash for ledger 2 etc. until we reach a ledger we know the hash of. I thought that would be 32569, but apparently that could be as small as 256.

This means we would need to try to create one ledger 0 for every 10 seconds of December 21st, build ledgers until 256 and one of these (in case there were no transactions in between) must fit the known hash for ledger 256. Since there were transactions, these need to be factored in and applied in the correct ledgers. this makes it more difficult (since the ledgers then contain more elements or we might not know if a transaction was applied in ledger 111 or 112 or 113 etc.) but still possible, since there are only a few dozen potential transactions in a few dozen potential places anyways and a few ten thousand possible timestamps for ledgers. Building a couple million small ledger chains until one fits might take some time, but definitely not forever.


Without seeing what actual data is on whatever hard drive, all of this feels like endless pontification to me. Show me the data :-)
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Re: Pushing genesis back to 0

Postby lucky331 » Wed Mar 12, 2014 1:30 pm

i don't think we'll like what we'll see if ever you guys get to pull this off.
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Re: Pushing genesis back to 0

Postby RafOlP » Wed Mar 12, 2014 1:39 pm

lucky331 wrote:i don't think we'll like what we'll see if ever you guys get to pull this off.

What do you have in mind, specifically?
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Re: Pushing genesis back to 0

Postby Sukrim » Sun Apr 06, 2014 1:28 am

Another month, another push...
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Re: Pushing genesis back to 0

Postby donch » Sun Apr 06, 2014 1:38 am

+(1<<32)
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Re: Pushing genesis back to 0

Postby freequant » Tue Apr 08, 2014 5:00 pm

We have:
1) a well formulated heavily computational problem.
2) plenty of idle WCG miners looking to throw their power to some new problem.
3) the skills and opensource software to setup and independent Boinc project.
4) a large giveaway budget that would allow to incentivize 2) to perform 1) using 3).
Gentlemen, I propose you the PGBZ or "Pushing genesis back to 0" giveaway.
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Re: Pushing genesis back to 0

Postby Sukrim » Tue Apr 08, 2014 9:10 pm

Without the transactions nothing goes. There is no way to try anything until these get posted somehow somewhere, even if there is too much/too little/wrong data in there.
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Re: Pushing genesis back to 0

Postby donch » Tue Apr 08, 2014 9:12 pm

Sukrim wrote:Without the transactions nothing goes. There is no way to try anything until these get posted somehow somewhere, even if there is too much/too little/wrong data in there.


It's as simple as that :-) Either the full db directory zipped from the backup that exists or (a bit more work for Ripple Labs) the actual transactions with metadata in hex form.
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Re: Pushing genesis back to 0

Postby freequant » Tue Apr 08, 2014 11:53 pm

Sukrim wrote:Without the transactions nothing goes. There is no way to try anything until these get posted somehow somewhere, even if there is too much/too little/wrong data in there.

Yes, the proposed giveaway project was assuming that RippleLabs would publish all the data they have ("a well formulated heavily computational problem").
It would be public data by now without that unfortunate incident. Why wouldn't they publish it?
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Re: Pushing genesis back to 0

Postby donch » Tue Apr 08, 2014 11:59 pm

freequant wrote:It would be public data by now without that unfortunate incident. Why wouldn't they publish it?


The thirty two thousand, five hundred and seventy ledger question!
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