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Understanding ZkSync Blocks: A Deep Dive into Ethereum Sidechains
As you delve deeper into the world of zk-Sync, the consensus mechanism built on the Ethereum network, it’s essential to understand the intricacies and workings of its blocks. In this article, we’ll break down what L1 bundles are, explore their relationship to aggregator blocks, and provide insight into how these mechanisms enable secure and efficient interaction between Ethereum and its sidechains.
What is a ZkSync block?
A zk-Sync block refers to a single block on the blockchain that contains multiple transactions. In the context of sidechains, each L1 bundle is a collection of transactions executed on the sidechain network. Each transaction is encoded as a separate Merkle branch, or series of hash values, that together make up the block.
L1 Bundles vs. Aggregate Blocks
While both terms describe a collection of transactions within a single block, they differ in the underlying architecture:
- L1 Batches: These are the individual components that make up an L1 batch. They contain multiple transactions encoded as separate Merkle branches or hash values.
- Collected Blocks: Aggregate blocks, in contrast, are batches of transactions that are combined into a single block. Each transaction within a batch is merged with others to create a new block.
How do ZkSync blocks work?
When you send L1 batches to Ethereum as L1 batches, they are essentially replicated across the Ethereum network and then appended to an aggregate block. Here’s a step-by-step breakdown of how the process works:
- Replication
: The original L1 batch is replicated on both the mainnet Ethereum and the sidechain nodes.
- Concatenation: When the replication process is complete, the L1 batches are concatenated into a single aggregate block.
- Extraction: The transactions in each L1 batch are hashed to create a unique Merkle branch or hash value for the combined block.
Example
Let’s say you send five L1 batches (each containing three transactions) to Ethereum as L1 batches. The resulting aggregate block would contain five separate blocks, each with its own set of transactions:
Aggregate Block 1: Transaction 1
Aggregate Block 2: Transaction 2
Aggregate Block 3: Transaction 3
Aggregate Block 4: Transaction 4
Aggregate Block 5: Transaction 5
In this scenario, each L1 batch is replicated on Ethereum and then appended to an aggregate block, resulting in a final concatenated block containing all five individual batches.
Conclusion
Zk-Sync blocks play a vital role in enabling secure interaction between Ethereum and its sidechains. By understanding how these mechanisms work, developers can design more efficient and scalable applications for their use cases. Whether it’s a decentralized finance (DeFi) protocol or an identity management system, understanding the intricacies of zk-Sync blocks is essential to the success of the Ethereum network.
By following this guide, you’ll gain a deeper understanding of how L1 stacks work in the context of zk-Sync and be better equipped to tackle the complex problems of the world of decentralized applications.