op-revm

Optimism variant of revm — the OP Stack's modifications to the Ethereum Virtual Machine, packaged as a custom EVM built on top of the upstream revm framework.

op-revm adds:

• Deposit transactions and the deposit transaction type
• L1 cost / blob fee accounting (L1BlockInfo)
• Operator fee handling (Isthmus / Jovian)
• OP-specific precompiles (BN254 pairing acceleration, etc.)
• OP-specific halt reasons and transaction errors
• Hardfork-aware spec selection (OpSpecId)

Provenance

This crate is the OP Stack's in-tree fork of revm's op-revm. It was migrated into the monorepo and is maintained here directly, evolving in lock-step with the rest of the OP Stack Rust code. The generic revm framework it builds on remains an external, pinned dependency (see UPDATING-RETH.md).

Features

• default = ["std", "c-kzg", "secp256k1", "portable", "blst"]
• std — enables std-dependent features in revm, alloy-primitives, serde_json, etc.
• serde — derives serde impls and forwards to revm/serde and alloy-primitives/serde
• portable, c-kzg, secp256k1, blst, bn — pass-through feature gates to the corresponding revm cryptographic backends
• dev, memory_limit, optional_balance_check, optional_block_gas_limit, optional_eip3541, optional_eip3607, optional_no_base_fee, optional_fee_charge — debugging / testing knobs forwarded to revm

Building & Testing

From rust/:

# Build
cargo build -p op-revm

# Tests
cargo nextest run -p op-revm --all-features

# no_std check (mirrors upstream's riscv32imac CI)
cargo build -p op-revm --target riscv32imac-unknown-none-elf --no-default-features

The no_std build is also exercised by just check-no-std and runs in CI on every PR that touches rust/**.

License

MIT — see LICENSE.