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@holgerd77 holgerd77 released this 23 Mar 12:42
· 1535 commits to master since this release
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Merge Kiln v2 Testnet Support

This release fully supports the Merge Kiln testnet v2 complying with the latest Merge specs. The release is part of an @ethereumjs/client v0.4 release which can be used to sync with the testnet, combining with a suited consensus client (e.g. the Lodestar client). See Kiln instructions to get things going! 🚀

In the VM the merge HF is now activated as being supported and an (experimental) Merge-ready VM can be instantiated with:

import VM from '@ethereumjs/vm'
import Common, { Chain, Hardfork } from '@ethereumjs/common'

const common = new Common({ chain: Chain.Mainnet, hardfork: Hardfork.Merge })
const vm = new VM({ common })
vm._common.isActivatedEIP(4399) // true
  • EIP-4399 Support: Supplant DIFFICULTY opcode with PREVRANDAO, PR #1565

EIP-3540: EVM Object Format (EOF) v1 / EIP-3670: EOF - Code Validation

This release supports EIP-3540 and EIP-3670 in an experimental state. Both EIPs together define a container format EOF for the VM in v1 which allows for more flexible EVM updates in the future and allows for improved EVM bytecode validation, see PR #1719.

Note that this EIP is not part of a specific hardfork yet and is considered EXPERIMENTAL (implementation can change along bugfix releases).

For now the EIP has to be activated manually which can be done by using a respective Common instance:

const common = new Common({ chain: Chain.Mainnet, hardfork: Hardfork.London, eips: [ 3540, 3670 ] })

EIP-3860 Support: Limit and Meter Initcode

Support for EIP-3860 has been added to the VM. This EIP limits the maximum size of initcode to 49152 and apply extra gas cost of 2 for every 32-byte chunk of initcode, see PR #1619.

Also here, implementation still EXPERIMENTAL and needs to be manually activated:

const common = new Common({ chain: Chain.Mainnet, hardfork: Hardfork.London, eips: [ 3860 ] })

L2 Support: Genesis State with Code and Storage

It is now possible within the VM to initialize with an extended genesis state not only containing account balances but also code and storage, see PR #1757. This is part of our emerging L2 support strategy to allow for a VM instantiation that closer resembles a specific L2 (or generally: custom chain) setup. Many L2 chains come with specific system contracts pre-initialized on genesis - see e.g. Optimism.

See Common custom chain initialization API on how to initialize a Common instance with a code-storage-containing custom genesis state.

Note that state in the VM is not activated by default (this also goes for account-only state). A state activation can now be explicitly triggered though by using the new activateGenesisState VM option.

L2 Support: Custom Opcodes Option

There is now a new option customOpcodes for the VM which allows to add custom opcodes to the VM, see PR #1705. This should be useful for L2s and other EVM based side chains if they come with a slighly different opcode set for bytecode execution.

New opcodes can be passed in with its own logic function and an additional function for gas calculation. Additionally the new option allows for overwriting and/or deleting existing opcodes.

Features

  • Added new VM.runBlock() option hardforkByTD for Merge transition support, PR #1802

Bug Fixes & Maintenance

  • Fixed REVERT bug where under certain conditions (revert reason larger than max code size), too much (all) gas was consumed, PR #1700
  • Debug log improvements on VM.runTx() execution and in EVM, PR #1677
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