fix: remove call stipend refund adjustment for blob tx gas accounting

[abmcar]

1. Does this PR affect any open issues?(Y/N) and add issue references (e.g. "fix #123", "re #123".):

• N
• Y

2. What is the scope of this PR (e.g. component or file name):

3. Provide a description of the PR(e.g. more details, effects, motivations or doc link):

• Affects user behaviors
• Contains CI/CD configuration changes
• Contains documentation changes
• Contains experimental features
• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Other

4. Are there any breaking changes?(Y/N) and describe the breaking changes(e.g. more details, motivations or doc link):

• N
• Y

5. Are there test cases for these changes?(Y/N) select and add more details, references or doc links:

• Unit test
• Integration test
• Benchmark (add benchmark stats below)
• Manual test (add detailed scripts or steps below)
• Other

6. Release note

None

[abmcar]

Fix the host to align with the changes in PR #312 so that, together with PR #312’s modifications, it can pass CI.

[Copilot]

Pull request overview

This PR fixes incorrect gas accounting for blob transactions by removing the erroneous CallStipendRefund tracking mechanism. The call stipend (2300 gas) is a special gas allowance added to CALL operations that transfer value, which is already properly handled at the opcode/instruction level. The removed code was incorrectly tracking and subtracting this stipend again during transaction-level gas accounting for blob transactions, resulting in double-counting.

Changes:

• Removed CallStipendRefund member variable and its initialization logic
• Removed call stipend refund adjustments from gas accounting in precompile execution, contract creation, and regular execution paths
• Removed call stipend tracking logic from the call_internal method
• Applied code formatting improvements including header reordering and multi-line statement alignment

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.