What Is a Transaction Sequencer and How Does It Attempt to Solve the Ordering Problem? ▴ Learn

What Is a Transaction Sequencer and How Does It Attempt to Solve the Ordering Problem?

A transaction sequencer is a centralized or decentralized entity in Layer 2 (L2) scaling solutions responsible for collecting, ordering, and batching L2 transactions before submitting them to the Layer 1 (L1) blockchain. Sequencers attempt to solve the ordering problem by enforcing a strict First-Come, First-Served (FCFS) order or a fair-sequencing mechanism.

This prevents external actors from reordering transactions via gas fee bidding, mitigating front-running within the L2 environment.

Does Transaction Batching Eliminate MEV Entirely?

How Do MEV-resistant Protocols Attempt to Solve the Transaction Reordering Problem?

Can Layer 2 Scaling Solutions Inherently Reduce the Opportunity for MEV Front-Running?

What Is EIP-1559 and How Did It Change the Gas Fee Mechanism?