Store historical issuers and use that data #925
Merged
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During startup, when reloading the effect of freeze transactions, it is checked, whether the sender of a freeze transaction is the issuer of that token and thus allowed to freeze tokens. However, if the issuer of the token has been changed in the meantime, that check fails. Such a fail is interpreted as state inconsistency, which is critical and causes a shutdown of the client.
With this change, historical issuers are persisted and can be accessed for any given block. When there is an issuer check, it now checks against the issuer at that point.
Please note: the internal database of Omni Core is upgraded, which triggers a reparse of Omni Layer transactions the first time this version is started. This can take between 30 minutes and a few hours of processing time, during which Omni Core is unusable!
This pull request resolves #922.