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Author Topic: BitCoin - scaling to long histories, validating rarely used coins?  (Read 1788 times)
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May 17, 2011, 01:44:58 PM

As I understand it, the current bit coin clients need to validate the entire BitCoin block history upon initial start up. Even with a relatively short history (~124K blocks), this took 1-2 hours on my Mac OSX. In 5 years time, how long will this take? What if BitCoin became *really* popular?

Is this fundamentally necessary, or is it just a current implementation decision?

If it isn't true, how does one validate the authenticity of coins that haven't been used for, say, 20 years?

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May 17, 2011, 03:20:38 PM

Presumably you would cache the 'latest' state for every coin.
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May 17, 2011, 03:42:43 PM

Could the client not be shipped with the first x blocks good to go? Thought I read that somewhere…

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May 17, 2011, 06:09:52 PM

Could the client not be shipped with the first x blocks good to go? Thought I read that somewhere…

You can download the blockchain seeded with 120,000 blocks.

One concern is the source of the block chain binary that you download (i.e., that one doesn't use SSL).

Also being discussed is how to implement a lightweight client that includes headers-only (i.e,. all data needn't be stored, just the headers)
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