go/oasis-node: Add the debug dumpdb command
#2921
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## master #2921 +/- ##
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+ Coverage 68.46% 68.49% +0.02%
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Files 360 360
Lines 34947 34994 +47
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+ Hits 23926 23968 +42
+ Misses 7941 7938 -3
- Partials 3080 3088 +8
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kostko
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May 21, 2020
It is safer if tooling can access on-disk state of an offline node in a way that ensures that writes will be rejected. This adds support for doing so by rejecting writes at the API level and by configuring the backing database to open the DB for read-only access.
The dump tool was duplicating a considerable amount of this, so refactor it out into a helper to minimize code duplication.
The timekeeping part of this (needed for the registry) will be somewhat annoying to implement, and it's unfortunate that the ApplicationState is now split into two interfaces, but I can't think of a better way to do it, and this shouldn't be that bad even if we add more things.
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This command will attempt to extract the ABCI state from a combination of a shutdown node's on-disk database and the genesis document currently being used by the network, and will write the output as a JSON formatted genesis document. Some caveats: - It is not guaranteed that the dumped output will be usable as an actual genesis document without manual intervention. - Only the state that would be exported via a normal dump from a running node will be present in the dump. - The epochtime base will be that of the original genesis document, and not the most recent epoch (different from a genesis dump).
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Fixes #2359