This change fixes a stall in the legacy blob sidecar conversion pipeline
where tasks that arrived during an active batch could remain unprocessed
indefinitely after that batch completed, unless a new external event
arrived.
The root cause was that the loop did not restart processing in
the case <-done: branch even when txTasks had accumulated work, relying
instead on a future event to retrigger the scheduler. This behavior is
inconsistent with the billy task pipeline, which immediately chains to
the next task via runNextBillyTask() without requiring an external trigger.
The fix adds a symmetric restart path in `case <-done`: that checks
`len(txTasks) > 0`, clones the accumulated tasks, clears the queue, and
launches a new run with a fresh done and interrupt.
This preserves batching semantics, prevents indefinite blocking of callers
of convert(), and remains safe during shutdown since the quit path
still interrupts and awaits the active batch. No public interfaces or logging
were changed.
This pull request introduces a queue for legacy sidecar conversion to
handle transactions that persist after the Osaka fork. Simply dropping
these transactions would significantly harm the user experience.
To balance usability with system complexity, we have introduced a
conversion time window of two hours post Osaka fork. During this period,
the system will accept legacy blob transactions and convert them in a
background process.
After the window, all legacy transactions will be rejected. Notably, all
the blob transactions will be validated statically before the conversion,
and also all conversion are performed in a single thread, minimize the risk
of being DoS.
We believe this two hour window provides sufficient time to process
in-flight legacy transactions and allows submitters to migrate to the
new format.
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Co-authored-by: Felix Lange <fjl@twurst.com>
