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omgnetwork / optimism

Monorepo implementing the Optimistic Ethereum protocol
https://optimism.io
MIT License
16 stars 6 forks source link

Pending Transaction From L2 to L1 Bridging #565

Closed dc8791 closed 2 years ago

dc8791 commented 2 years ago

L2 to L1 fast bridging of OMG tokens is supposed to be fast. My transaction had been pending for 7 hours with 16 confirmations. What’s holding the pending status for so long?

dc8791 commented 2 years ago

Transaction Hash 0xfcf9c2cabdcb54f1517eacda49090f948c14404587a0e14b7b995a90aebcf403

CAPtheorem commented 2 years ago

Please check now

CAPtheorem commented 2 years ago

Update - we just added a system to automatically flag stuck transactions and prioritize them, so this should stop happening.

https://github.com/omgnetwork/optimism/pull/558#issue-1014568952

Root cause - in case you are interested. The underlying problem was the old logic that was used to pass messages when L1 gas was spiking. In that case, we waited for some time - e.g. 20 mins, in hope that gas would drop - but if it did not drop quickly enough, then pending transactions got stuck. In the new logic deployed around block 13361180, we now store those stuck transactions in a separate buffer and prioritize them for relay to L1.

Hope this helps!

Sorry for the TX delay - it's ironic that the 'fast' bridge was sometimes super slow.

dc8791 commented 2 years ago

Thanks and appreciate the explanation!