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430611d3bc
* Clear rejected sync target so that it would not be processed again * Use in-memory table to stash headers after FCU import has started why: After block imported has started, there is no way to save/stash block headers persistently. The FCU handlers always maintain a positive transaction level and in some instances the current transaction is flushed and re-opened. This patch fixes an exception thrown when a block header has gone missing. * When resuming sync, delete stale headers and state why: Deleting headers saves some persistent space that would get lost otherwise. Deleting the state after resuming prevents from race conditions. * On clean start hibernate sync `deamon` entity before first update from CL details: Only reduces services are running * accept FCU from CL * fetch finalised header after accepting FCY (provides hash only) * Improve text/meaning of some log messages * Revisit error handling for useless peers why: A peer is abandoned from if the error score is too high. This was not properly handled for some fringe case when the error was detected at staging time but fetching via eth/xx was ok. * Clarify `break` meaning by using labelled `break` statements * Fix action how to commit when sync target has been reached why: The sync target block number might precede than latest FCU block number. This happens when the engine API squeezes in some request to execute and import subsequent blocks. This patch fixes and assert thrown when after reaching target the latest FCU block number is higher than the expected target block number. * Update TODO list