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What was wrong?
Fixes #186
The gas limit changed because of py-evm backend
How was it fixed?
By overriding the header creation function to just copy the gas limit from the parent.
Let me know if this was the correct place to add the tests.
I did not know why
validate_seal
was added as@classmethod
, so maybe you want that for create_header_from_parent` too.Also, this might be a breaking change for folks that rely on that behavior (one test here also expected that behavior). Another option would be to make it somehow configurable, but that would be more work. I think the default should be constant gas limit.