feat(anvil): API to disable sidecar requirement for eip4844 transaction

[polka125]

Component

Anvil

Describe the feature you would like

Currently, when submitting an eip4844 transaction without sidecar, it gets discarded with the message

{"code":-32003,"message":"eip4844 tx variant without sidecar being used for verification."}

Due to the checks here

foundry/crates/anvil/src/eth/api.rs

Line 2924 in 1091634

// It is not valid to receive a TxEip4844 without a sidecar, therefore

                    // It is not valid to receive a TxEip4844 without a sidecar, therefore
                    // we must reject it.
                    TxEip4844Variant::TxEip4844(_) => {
                        return Err(BlockchainError::FailedToDecodeTransaction)
                    }

Sometimes, it is desirable to skip this check in the spirit of the --auto-impersonate flag, for example when simulating the execution of old blocks with no access to the blob data.

Would it be possible to add a flag for disabling the sidecar checks on submitting a raw eip4844 transaction?

Additional context

No response

[zerosnacks]

I think it would be reasonable to disable the sidecar requirement if the transaction is being impersonated

[mattsse]

that sounds reasonable

[sambacha]

Would it be possible to just have anvil query an endpoint for this information? I have a use case for this actually

[polka125]

I would disagree on querying as the blob data is supposed to be available for a limited period of time, so for my use case of reproducing old blocks it won't work. Or at least I disagree on forcing the user to have access to this data. Moreover, this data, as I understand, can't be queried from standard JSON-RPCs and one would need to provide an access to beacon api.

Maybe it's better to have this query endpoint in cast