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# System prepended metadata

title: Research EIP-4844

---

Originated from the [task](https://linear.app/lidofi/issue/VAL-344/research-eip-4844).

# Impacts on MEV/Relay monitoring
It looks like there is no direct impact on any part of monitoring. However, we can account this new type of transactions by introducing new metrics and indexes.

For example, add new fields in the relay-m endpoints' [schema](https://github.com/lidofinance/lido-relay-monitoring/blob/develop/src/dto/relay-validator-endpoints.dto.ts#L62):
- blob_gas_used (string)
- excess_blob_gas (string)


# Impacts on the rest parts of the system
The EIP says that a new transaction type will be introduced as well as a new type of gas. It calls "blob gas".

Afaik, some services of Lido uses gas fee prediction. I would suggest to make some changes in these parts. See details [here](https://eips.ethereum.org/EIPS/eip-4844#gas-accounting).

# Facts

Data from sidecars can be fetched by a separate endpoint call: https://ethereum.github.io/beacon-APIs/?urls.primaryName=dev#/Beacon/getBlobSidecars 