New -testnet genesis block, and difficulty adjustment rules.
Testnet difficulty #53
pull gavinandresen wants to merge 3 commits into bitcoin:master from gavinandresen:testnet_difficulty changing 2 files +21 −7-
gavinandresen commented at 2:26 PM on January 31, 2011: contributor
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Testnet: new genesis block and difficulty adjustment rules c47eb4e48d
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Detect genesis block change if run against old blk*.dat ad0523dd80
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gavinandresen commented at 11:49 PM on January 31, 2011: contributor
Did I get the difficulty adjustment backwards? D'oh!
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Thanks dooglus for pointing out I got the difficulty adjustment exactly backwards e948fa446e
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gavinandresen commented at 11:55 PM on January 31, 2011: contributor
Why 21 hours: it is exactly 1/16th the 2 weeks/2016 blocks of the main chain, and is more than 120 blocks (seemed like a good idea to allow blocks to mature and get spent before difficulty adjusts).
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dooglus commented at 4:40 AM on February 2, 2011: contributor
I think I prefer exactly 1/14th the 2 weeks. Make it 24h, then we're aiming to change difficulty at the same time each day, and can see whether the actual change times drift forward of backward on the clock.
Unless there's a good reason not to? 24 hours is 144 blocks.
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gavinandresen commented at 3:48 PM on February 3, 2011: contributor
There's no consensus on changing the difficulty rules, so I'm closing this and will pull davouts just-change-the-genesis-block patch.
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