AF1.2.2 Fix brittle and inconsistent error checking#219

shenkeyao wants to merge 3 commits intocelo-integration-rebase-13.2EspressoSystems/optimism-espresso-integration:celo-integration-rebase-13.2from

keyao/fix-error-handlingEspressoSystems/optimism-espresso-integration:keyao/fix-error-handlingCopy head branch name to clipboard