PlayerAuctions Changelog - v2.5.1 (Critical Bug Fix)

📋 Summary

• Fixes severe race condition allowing multiple simultaneous purchases of the same auction item, leading to duplicates, multiple payments, and economy exploits.
• Impact: Ensures atomic transactions, preventing economic damage and maintaining server fairness.

🔴 Bug Details

• Problem: Auction remained ACTIVE during money/item transfers, enabling concurrent buys.

  • Old Flow: Check → Transfers → Mark FINISHED (vulnerable window).

• Root Cause: Non-atomic operations in multi-threaded environment.

• Solution: Atomic reservation with optimistic locking.

  • New Flow: Check → Reserve (mark FINISHED) → If fails, abort → Transfers with rollbacks → Log/notify.
  • Improvements: Rollbacks on errors; main-thread inventory; enhanced logging/feedback.

🔒 Security

• Prevents item duplication, economy drains, and unfair advantages.