# \#l2

**URL:** https://forum.tezosagora.org/tag/l2/23.md

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## [An impromptu chat with Arthur Breitman about Rollups both ZK and Optimistic](https://forum.tezosagora.org/t/an-impromptu-chat-with-arthur-breitman-about-rollups-both-zk-and-optimistic/3576)

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**Author:** [@JarrodWoodard](https://forum.tezosagora.org/u/JarrodWoodard)\
**Replies:** 0\
**Last updated:** [August 17, 2021, 10:26pm UTC](https://forum.tezosagora.org/t/an-impromptu-chat-with-arthur-breitman-about-rollups-both-zk-and-optimistic/3576 "2021-08-17T22:26:35Z")

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This exchange took place on July 27th in the Tezos element chat. It has been formatted and edited to make it more readable. Jarrod Woodard: ZkRollups can only contain transactions, not contract calls, right? Murbard: …

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## [An impromptu chat with Gabriel Alfour about the L2 solution Optimistic Rollups](https://forum.tezosagora.org/t/an-impromptu-chat-with-gabriel-alfour-about-the-l2-solution-optimistic-rollups/3502)

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**Author:** [@JarrodWoodard](https://forum.tezosagora.org/u/JarrodWoodard)\
**Replies:** 3\
**Last updated:** [July 26, 2021, 1:12pm UTC](https://forum.tezosagora.org/t/an-impromptu-chat-with-gabriel-alfour-about-the-l2-solution-optimistic-rollups/3502 "2021-07-26T13:12:18Z")

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I had the pleasure of asking Mr Alfour about zk-Rollups and thought others might benefit from the convo so I thought I’d share it here: Jarrod Woodard: Hi there! Would you mind giving a introduction? Jarrod Woodard: …