🔢 Ordering Strategies: FIFO, Priority, Fairness
Understand different approaches to transaction sequencing
Watch how rollups batch transactions
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0 / 5 completed📊 Transaction Ordering Strategies
How a sequencer orders transactions has profound implications for fairness, MEV, and user experience. Explore different ordering strategies and their trade-offs.
🎮 Strategy Comparison Tool
Select an ordering strategy to see its characteristics, trade-offs, and real-world adoption.
First-In-First-Out (FIFO)
✓ Advantages
- • Simple to implement
- • Predictable ordering
- • No gas price competition
- • Fair time-based queue
✗ Disadvantages
- • Vulnerable to spam
- • No MEV capture
- • Can be gamed with early submission
- • No priority mechanism
📈 Performance Metrics Calculator
Adjust gas price to see how it affects system metrics under the First-In-First-Out (FIFO) strategy.
🔄 Hybrid Approaches
Many L2s are experimenting with hybrid ordering strategies to balance fairness, efficiency, and user choice.
Arbitrum Timeboost
FIFO base with optional express lane auction for priority ordering. Users choose speed vs cost.
Chainlink FSS
Fair Sequencing Services using threshold encryption to prevent front-running while maintaining efficiency.
Priority Gas Auctions
Similar to EIP-1559, but with sequencer-specific priority fees that don't affect base execution.