Execution Layer Meeting 175

[timbeiko]

Meeting Info

• Nov 23, 2023, 14:00-15:30 UTC
• Youtube Stream: https://youtube.com/live/_by0UBqrYng
• Zoom: shared on #allcoredevs Discord channel shortly before the call
• Ethereum Protocol Calls Calendar subscription

Agenda

• Dencun Updates
  • Testing Updates
  • disallow VALID <-> INVALID equivocation execution-apis#493
  • devnet-12
  • Next Steps
• Goerli shutdown
• eth_multicall

[MicahZoltu]

Proposed Agenda Item: eth_multicall ethereum/execution-apis#484

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Summary

This introduces a new RPC method eth_multicallV1 that allows users to simulate complex transaction sets with an Ethereum client. Compared to eth_call, eth_multicallV1 has following extra features:

• You can encapsulate multiple dependent EVM calls in a single RPC call
• The calls happen inside blocks. You can simulate multiple blocks that can be arbitrary far from each other
• Block variables can be overridden (e.g. time)
• Account state can be overridden for every block (e.g. code and balance)
• It is possible to override precompiles (e.g. ecrecover) with arbitrary EVM code
• ETH transfers produce logs similar to ERC20 logs
• Validation mode: You can choose to do very strict simulation or more relaxed one similar to eth_call

Motivation

The features of eth_multicallV1 allow many interesting use cases such as:

• Simulate simple erc20 approval & swap feature in a wallet, which requires sending multiple transactions
• Searchers need to trigger oracle update and wait a number of blocks
• Researchers need to trigger a price change and wait a number of blocks for a TWAP adjustment
• Wallets are beginning to provide advanced simulation to the user
• Block builders are beginning to explore multi-block MEV
• Fake Permit2 or other signature based EIP-712 approvals

[timbeiko]

Added @MicahZoltu !

[mkalinin]

@tersec and I would like to make a note on the absence of equivocations on the payload status in the Engine API calls and its importance for CL clients, the corresponding PR:

• disallow VALID <-> INVALID equivocation execution-apis#493

[timbeiko]

Closed in favor of #910