[Batcher] Fix memory leak, reverse prepended blocks #12874
Merged
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Description
#12810 removed the call to
removePendingChannel
which is causing a memory leak in the batcher.Also revert the reverse ordering change introduced by that PR.
Tests
Tested by running the devnet locally, and checking the memory usage doesn't grow in pprof.
Additional context
We're seeing our batcher process OOM on Base Sepolia.