Tier 4: Advanced Features & Future Hardforks

[mw2000]

Summary

Tracking issue for advanced features and forward-looking implementations that go beyond current spec compliance.

Priority

Low — nice-to-have features that improve developer experience and prepare for future hardforks.

Sub-issues

• Implement EOF bytecode format (EIP-3540 / EIP-7692) #87 — Implement EOF bytecode format (EIP-3540 / EIP-7692)
• Add opcode-level execution tracing #89 — Add opcode-level execution tracing
• Add custom precompile registration API #88 — Add custom precompile registration API

Notes

• EOF is the largest item here and is NOT yet active on mainnet. It's a forward-looking implementation.
• Tracing is critical for debugging StateTest failures — consider implementing earlier if test debugging becomes painful.
• Custom precompiles enable L2/rollup use cases.

Implementation Order

Independent (no dependencies between them):
  #89  Execution tracing (medium — useful for debugging)
  #88  Custom precompile API (small — refactoring existing code)
  #87  EOF (very large — can be deferred)

Parent

• EVM Completeness: Missing opcodes, precompiles, and gas rules #30 — EVM Completeness tracking issue