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assumeutxo: Remove BLOCK_ASSUMED_VALID flag

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Flag adds complexity and is not currently used for anything.
This commit is contained in:
Ryan Ofsky
2024-02-05 17:10:27 -05:00
parent ef174e9ed2
commit 9d9a7458a2
5 changed files with 17 additions and 71 deletions
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12
doc/design/assumeutxo.md
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@@ -51,18 +51,12 @@ The utility script
## Design notes
- A new block index `nStatus` flag is introduced, `BLOCK_ASSUMED_VALID`, to mark block
index entries that are required to be assumed-valid by a chainstate created
from a UTXO snapshot. This flag is used as a way to modify certain
CheckBlockIndex() logic to account for index entries that are pending validation by a
chainstate running asynchronously in the background.
- The concept of UTXO snapshots is treated as an implementation detail that lives
behind the ChainstateManager interface. The external presentation of the changes
required to facilitate the use of UTXO snapshots is the understanding that there are
now certain regions of the chain that can be temporarily assumed to be valid (using
the nStatus flag mentioned above). In certain cases, e.g. wallet rescanning, this is
very similar to dealing with a pruned chain.
now certain regions of the chain that can be temporarily assumed to be valid.
In certain cases, e.g. wallet rescanning, this is very similar to dealing with
a pruned chain.
Logic outside ChainstateManager should try not to know about snapshots, instead
preferring to work in terms of more general states like assumed-valid.