Automatically rescan after restoring wallet.dat #152

1. 
   sipa commented at 2:22 pm on April 13, 2011: member

   Information about the best known chain is added to wallet.dat. If this information does not match the data in blkindex.dat, a rescan is automatically performed at startup, starting from the the last known block. When upgrading from a wallet which does not have this information, no rescan is done automatically.
2. 
   sipa commented at 2:25 pm on April 13, 2011: member

   One thing I did not test, is the slowdown. Continuously creating CBlockLocator’s and writing them to wallet.dat may slow down initial block download.
3. 
   gavinandresen commented at 2:43 pm on April 13, 2011: contributor

   Nice! RE: block download speed: I’d suggest a check for if IsInitialBlockDownload() and don’t bother writing best-block-index during the initial block download.
4. 
   sipa commented at 3:33 pm on April 13, 2011: member

   Ok, updated.
5. 
   gavinandresen commented at 4:07 pm on April 15, 2011: contributor

   Looking at this again and thinking about pulling, it seems more complicated than it needs to be– CBlockLocator can already serialize/deserialize itself, is there a reason for the ReadBestBlock/WriteBestBlock methods? Why not just Read/Write the CBlockLocator instead of CBLockLocator.vHave?
6. Automatically rescan after restoring wallet.dat

   Information about the best known chain is added to wallet.dat. If this
   information does not match the data in blkindex.dat, a rescan is automatically
   performed, starting from the the last known block. When upgrading from a wallet
   which does not have this information, no rescan is done automatically.

   4f40b0922e
7. 
   sipa commented at 5:38 pm on April 17, 2011: member

   I didn’t realize db.h did define classes from main.h as well, to use them. I added CBlockLocator to those and simplified the patch.
8. 
   gavinandresen commented at 3:35 pm on April 20, 2011: contributor

   Pulled via cherry-pick.
9. gavinandresen closed this on Apr 20, 2011

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