op-program: Implement oracle based L1 fetcher#5411
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protolambda
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LGTM, but maybe clarify some method names
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Description
Provides an implementation of
derive.L1Fetcherthat uses data from the L1 oracle interface. Currently the only implementation of this fetches information from an L1 node but it's now done in a way that could be replaced with a pre-populated oracle for offline replay.Adds the
--l1.headCLI arg to the host program which sets the head block for L1 that the derivation pipeline stops processing at. This allows the fault proof program to process up to a specific "safe" L2 block rather than continuing processing until the latest L1 chain head.Tests
Lots of unit tests.
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