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I have bitcoin-qt running on online computer. I want to:

  1. copy blockchain to offline computer (preferably using WORM media for security reasons)
  2. from time to time update offline copy with newest blocks with smallest effort. Smallest effort means - among others - that I don't want to re-record whole blockchain from online computer to media every time and would prefer incremental copy instead.

The main obstacle that I encountered until now was that - sometimes - when I updated bitcoin-qt on online computer, the 'blocks' directory was wiped out. Then whole blockchain has been re-downloaded, preventing me from copying new blocks incrementally (because for some reason new blk*.dat files had different size/content then previous).

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  • There are wallets that explicitly support cold wallets (example) - maybe looking at how those work would help? – RedGrittyBrick Mar 12 '19 at 16:38
  • @RedGrittyBrick the idea is to allow for verification of transaction history on offline computer, so cold wallet support is not enough. – cryptogopher Mar 12 '19 at 22:04
  • Ah OK. Interesting project. – RedGrittyBrick Mar 13 '19 at 8:55

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