Move CHistoryWriter into CCustomCSView #1700
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Bushstar
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Mixa84,
wafflespeanut,
prasannavl and
Jouzo
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Jouzo
previously approved these changes
Jan 18, 2023
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CHistoryWriter should be created outside of any call to ConnectBlock or DisconnectBlock. This allows us to sometimes not pass in a history writer at all to avoid writing changes. For example, when starting the node VerifyDB is run which disconnects blocks. The changes made by VerifyDB when disconnecting blocks should be discarded, but for our bespoke DBs pburnHistoryDB, paccountHistoryDB and pvaultHistoryDB this did not happen which resulted in entries being removed from those DBs when new blocks were connected and the DBs were flushed.
This PR resolves that issue and is a step towards making all history writer DBs an integrated part of CCusttomCSView with layered flushing which will help simplify use and code further.