ethapi: add block override to estimateGas #30695
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internal/ethapi/api.go
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| Chain: NewChainContext(ctx, b), | ||
| Header: header, | ||
| Chain: chainContext, | ||
| Header: blockOverrides.MakeHeader(header), |
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Please revert this line. The EVM doesn't have access to the header directly anyway. It only accesses block fields via the block context object.
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Yeah it took me a while to find this, I was taking most of the code fromDoCall path which doesn't do this. But the problem with the estimate path is that it uses the header in https://github.com/ethereum/go-ethereum/blob/master/eth/gasestimator/gasestimator.go#L221
Without this line the block overrides are not available in solidity code when running the unit test; this could be because is the test isn't setup correctly or it could genuinely be needed.
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Riighhtt this made me realize we should do this differently. Right now you're effectively only applying the block overrides to mutate the header and pass that to the gasestimator.
IMO we should pass in the overrides to gasestimator and apply them there just before execution. But that will create an import cycle. Hmm...
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I was surprised by the number of differences between the two endpoints. They are basically the same thing, except when they are not!
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Another option is to move the gasestimator package up into the ethapi package to prevent this.
let me know what you think ...
c5af175
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This was a deliberate change to move gas estimator out of rpc: #28600. let me think about it
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Alternatively, I could pass it in on the options, but that didn't feel right.
antonydenyer
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Add block overrides to
eth_estimateGasto align consistency witheth_call#27800 (comment)
Fixes #28175