Feat: merge rlease v2.2.1 - Prague refactoring

[mrLSD]

• Gasometr: refactoring and improvements

• Bump version to: v2.2.1

• Extend doc comment for calculate_intrinsic_gas_and_gas_floor

• feat: introduce gas_floor_base_cost for EIP-7623 compliance (feat: introduce gas_floor_base_cost for EIP-7623 compliance #101)

• feat: introduce gas_floor_base_cost for EIP-7623 compliance

• fix: replace simple arithmetic operations with saturating_* analogs for gas calculations

• chore: remove gas_floor_base_cost constant

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Summary by CodeRabbit

• Refactor

  • Reworked gas calculation and transaction verification for clearer separation of concerns and maintainability.
  • Improved floor-gas handling with better compliance to EIP-2028 and EIP-7623.

• Behavior

  • Transaction processing now computes intrinsic gas and floor gas separately and enforces gas limits and optional gas-floor checks.

• Documentation

  • Minor doc note about a planned config rename in a future release.

[coderabbitai]

Walkthrough

Refactors the gasometer to extract intrinsic and floor gas computation into three new functions: calculate_intrinsic_gas_and_gas_floor(), intrinsic_gas_and_gas_floor(), and verify_transaction(). record_transaction() now delegates to verify_transaction(). Adds a TODO comment to runtime::Config.gas_transaction_call.

Changes

Cohort / File(s)	Summary
Gasometer refactor evm/src/gasometer/mod.rs	Added calculate_intrinsic_gas_and_gas_floor(data, access_list, authorization_list_len, config, is_contract_creation), intrinsic_gas_and_gas_floor(cost, config), and verify_transaction(&mut self, cost). record_transaction() now calls verify_transaction(); intrinsic gas and floor-gas logic moved into helpers; preserved logging and event emission.
Runtime doc evm/src/runtime/mod.rs	Added a TODO doc comment on Config.gas_transaction_call noting planned rename in 3.0.0 (no API change).

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Possibly related PRs

• Feat: gasometr refactoring and improvements #100 — Implements the same helpers (calculate_intrinsic_gas_and_gas_floor, intrinsic_gas_and_gas_floor, verify_transaction) and similar record_transaction refactor.
• feat: introduce gas_floor_base_cost for EIP-7623 compliance #101 — Modifies gasometer intrinsic and floor-gas calculation logic, centralizing floor_gas_calc and related rules.

Suggested reviewers

• aleksuss
• birchmd

Poem

🐰 With careful hops I count each gas and floor,
I split the costs and check the limit's door,
Verify, record, and log the trace,
A rabbit's song for tidy code and grace,
Hop on—transactions balanced evermore.

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'Feat: merge rlease v2.2.1 - Prague refactoring' references gasometer refactoring and EIP-7623 compliance work, which aligns with the main changes in the PR modifying gasometer gas calculation logic.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.

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✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch current-prague-hard-fork

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[coderabbitai]

Actionable comments posted: 1

🤖 Fix all issues with AI agents

In `@evm/src/gasometer/mod.rs`:
- Around line 505-511: Fix the typo in the comment ("cas_cost" → "gas_cost") and
make the gas check use the same accessor consistently: replace the earlier use
of self.gas() with self.gas_limit() so the EIP-7623 floor check uses
self.gas_limit() for both comparisons; update the comment to read "gas_cost" and
ensure the conditional still checks self.config.has_floor_gas &&
self.gas_limit() < floor_gas and sets self.inner = Err(ExitError::OutOfGas) /
returns Err(ExitError::OutOfGas) as before.