When reindexing we now always first try to open a file read-write because
the algo to only open the last file in a sequence as RW failed in such
situations where we don't know the amount of files yet.
To allow the UTXO to actually use the power of checkpoints we need to
make sure that the block-validation state is not stored separately from
it.
The goal is that when we have some curruption we can just go back to an
earlier state of the UTXO and re-validate the blocks to get to the
current tip. The often seen problem is that corruption will instead
leave the block-index (leveldb) with an incorrect state so the replay
fails.
This change solves that by no longer reading the block-validation-state
and no longer writing it on a state change.
The UTXO keeps outdated records around in an append-only file, which
means we need to do a garbage collect regularly.
This new algo uses the commulatative amount of changes since last GC
(aka prune) as an indicator to plan a new one.
The effect should be much smaller files to keep in memory and the data and
jump tables being much more localized which should result in higher
throughput.
THe builder now allows you to create a message with the
serviceId, the messageId and the requestId pre-set.
This benefits code that just takes the output from the
builder and calls 'send' on it immediately saving several
lines of code.
Ship unit-testing functionality in the releease builds too,
external users may want to compile their apps in debug mode while
flowee is a release build.
This improves the double spend proof orphans code.
Also add a DSProof log-category and lots of log lines to make
looking at a debug build much more fun.
From now on, make sure that the minor always has at least 2 digits
which allows us to use string compare of versions even if we have
more than 9 releases in a year.
The FloweeJS component uses this class but requires the usage
of the NodeJS 'main' thread. Which needs safe access to the jobs
list at the same time the Flowee workers need access.
Simple solution; add a mutex.
TomZ