[pallet-revive] Update gas encoding

[pgherveou]

Update the current approach to attach the ref_time, pov and deposit parameters to an Ethereum transaction.
Previously we will pass these 3 parameters along with the signed payload, and check that the fees resulting from gas x gas_price match the actual fees paid by the user for the extrinsic.

This approach unfortunately can be attacked. A malicious actor could force such a transaction to fail by injecting low values for some of these extra parameters as they are not part of the signed payload.

The new approach encodes these 3 extra parameters in the lower digits of the transaction gas, approximating the the log2 of the actual values to encode each components on 2 digits

[pgherveou]

/cmd prdoc --audience runtime_dev --bump minor

[smiasojed]

Now I have the option to set the gas limit for a ETH transaction either manually or by estimating it (dry-run). Will both option work after this change?

[smiasojed]

Previously, these three parameters were passed along with the signed payload, and the fees resulting from gas × gas_price were checked to ensure they matched the actual fees paid by the user for the extrinsic ?

[pgherveou]

Now I have the option to set the gas limit for a ETH transaction either manually or by estimating it (dry-run). Will both option work after this change?

You can but you need to setting sufficient values for the 6 lowers digits that encode the weights and deposit

[paritytech-workflow-stopper]

All GitHub workflows were cancelled due to failure one of the required jobs.
Failed workflow url: https://github.com/paritytech/polkadot-sdk/actions/runs/12712453563
Failed job name: test-linux-stable