fix(op): parse l1 block info from l2 tx input

[emhane]

Closes #10462

Fixes offsets for parsing l1 base fee scalar and l1 blob base fee scalar

[mattsse]

the offsets were wrong because of the selector is already removed here?
but doesn't this ignore the block sequencer number as described in the function docs

@clabby mind taking a look at this?

[mattsse]

ah maybe the function docs are wrong because the order is

https://github.com/ethereum-optimism/optimism/blob/9452aa66dc7a2e0deb63bca4bf5c7cfc35c3211c/packages/contracts-bedrock/src/L2/L1Block.sol#L129

[emhane]

the offsets were wrong because of the selector is already removed here?

no they were wrong despite that, base fee scalar was before taken at offset 12..16, when actually it's at offset 0..4. the selector is only 4 bytes.

got the correct order from op-geth code, as linked in the code comment https://github.com/ethereum-optimism/op-geth/blob/60038121c7571a59875ff9ed7679c48c9f73405d/core/types/rollup_cost.go#L317-L328

[mattsse]

okay, this seems correct, can we update the function docs, because the sequence number is incorrect there

doc nits, pending sanity check @clabby or @refcell

[tynes]

This looks good to me given the above comments are addressed

[clabby]

LGTM - looks like the old test for Ecotone also needs to be changed.

[mattsse]

the function docs need to be updated

L111 is incorrect and should be removed