Source Available License

StarkWare Source Available License

Version 1.0, November 2020

This license contains the terms and conditions under which StarkWare Industries, Ltd (“StarkWare”) makes available its StarkEx Cairo Software (link to repository coming soon) (“Cairo Software”). Your use of the Cairo Software is subject to these terms and conditions.

StarkWare grants you a license to use and distribute the Cairo Software during the Test Period, only for writing Cairo programs. The Cairo Verifier Smart Contract (“Verifier”) is not part of the Cairo Software and is subject to a separate license. The “Test Period” will end on March 31, 2021, however, StarkWare may extend this date by posting a notice of extension referencing this license on its web site https://www.starkware.co/source-available-license/.

These terms do not allow you to sublicense or transfer any of your rights to anyone else. These terms do not imply any other licenses not expressly granted in this license.

If you violate any of these terms, use the Cairo Software in a way not authorized under this license, your license ends immediately. If you make, or authorize any other person to make, any written claim that the Cairo Software infringes or contributes to infringement of any patent, all rights you are granted under this license end immediately. In either case, for purposes of your license, the Test Period will end.

After the end of the Test Period, you will not be licensed to use the Cairo Software to write Cairo programs, but you may retain and distribute copies of the Cairo Software only as needed to allow Ethereum nodes to sync with the Ethereum Mainnet and verify Ethereum transactions.

As far as the law allows, the Cairo Software is provided AS IS, without any warranty or condition, and StarkWare will not be liable to you for any damages arising out of these terms or the use or nature of the Cairo Software and/or the Verifier, under any kind of legal claim.