a sequencer plays a crucial role in ordering and batching transactions before they are added to the blockchain.
does the following tasks
- transaction ordering:
- blockchain transactions are typically broadcast to the network in a random order.
- the sequencer takes these transactions and orders them into a specific sequence, ensuring consistency and fairness in the ordering process.
- batching: after ordering the transactions, the sequencer groups them into batches or blocks. this batching process helps improve the efficiency of the blockchain by allowing multiple transactions to be processed together.
- data availability: the sequencer is responsible for making the batched transactions available to the blockchain network. it stores these on the DA layer ( like celestia )
- proposing blocks: in some blockchain architectures, the sequencer proposes the ordered and batched transactions as blocks to be added to the blockchain. the process of validating and committing these blocks may involve other components or consensus mechanisms.