Will it be correct to say that Polygon ZK-EVM takes 2 transactions on L1 to make a transaction on L2?

Zero Knowledge Polygon-Hermez-zkEVM
1

As far I understand for the ZK-EVM

  1. User sends txn from wallet to the sequencer
  2. Squencer sends the txn data in batches to L1 smart contract. (1 transaction done)
  3. Then again prover takes the txn data and creates proof and commits to L1 (1 transaction done)

In this way for every transaction on ZK-EVM, 2 transactions need to be done in L1.
If so, then if I don’t care about gas price and need the speed in such case ZK-EVM might not be suitable correct ??

2

To be clear, transactions 2 and 3 are for the settlement of batches for the rollup itself. If you trust the sequencer, you have near instant completion of the transaction on L2.

From a speed prospective, zkEVM is one of the fastest L2s to achieve a final state, with withdrawals taking 1 batch proof (30-40 minutes today) compared to 24 hours for other zk rollups and 7 days (!!) for optimistic rollups.

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3

No, it wouldn’t be correct to say that Polygon’s ZK-EVM takes 2 transactions on Layer 1 (L1) to make a transaction on Layer 2 (L2). In fact, one of the main benefits of Layer 2 solutions like Polygon’s ZK-EVM is to reduce the number of transactions on the Layer 1 chain.