# \#starkex

**URL:** https://community.starknet.io/tag/starkex/3.md

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## [What is StarkEx?](https://community.starknet.io/t/what-is-starkex/22)

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**Author:** [@henrli](https://community.starknet.io/u/henrli)\
**Replies:** 0\
**Last updated:** [October 28, 2021, 8:06am UTC](https://community.starknet.io/t/what-is-starkex/22 "2021-10-28T08:06:03Z")

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StarkEx is a standalone system for exchanges that uses the STARK proof system in order to provide scalability for the exchanges using it. Exchanges using StarkEx in production on Ethereum mainnet include DeversiFi, dYdX,…

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## [Where can I see the dydx Cairo code?](https://community.starknet.io/t/where-can-i-see-the-dydx-cairo-code/24)

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**Author:** [@henrli](https://community.starknet.io/u/henrli)\
**Replies:** 0\
**Last updated:** [October 28, 2021, 8:12am UTC](https://community.starknet.io/t/where-can-i-see-the-dydx-cairo-code/24 "2021-10-28T08:12:53Z")

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Here: You should note that this is a Cairo program and not a StarkNet contract . See this topic about the difference.