implement shadow feature for juno sequencer #2173
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Codecov ReportAttention: Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## main #2173 +/- ##
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- Coverage 76.25% 72.10% -4.15%
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Files 104 111 +7
Lines 11200 12818 +1618
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+ Hits 8540 9242 +702
- Misses 2012 2783 +771
- Partials 648 793 +145 ☔ View full report in Codecov by Sentry. |
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* allow sequencer to serve data over p2p also creates a cmd line flag to disable fees
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closes #2015
Just creating a fresh branch with all commits from PR 2015 squashed into one, to make reviewing easier.
This PR builds on top of the rianhughes/merge-sequnecer PR. It implements a new "shadow" mode for the Juno sequencer feature. This "shadow" mode pulls blocks from the FGW, re-executes them, builds the corresponding state-update (etc), and applies it to the local blockchain if the verification checks pass.
Running
make sequencer-shadow-sepoliawith a snapshot from a 0.13.2 block, will allow it to "sync" the Sepolia network by re-executing every block, and only storing it if the verification checks pass. Currently, this is running fine from block ~120,000 to block ~190,000 (still syncing at the time of writing), without any issues.The main logic is contained in the runSequencer() function in the
builderpackage. There are some helper functions that really aid in debugging (eg CompareReceipts(), the Print() methods on some of the methods), which I've left in.