> For the complete documentation index, see [llms.txt](https://contracts.synapseprotocol.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://contracts.synapseprotocol.com/elin/contracts-upgradeable/cryptography.md).

# cryptography

- [ECDSAUpgradeable](https://contracts.synapseprotocol.com/elin/contracts-upgradeable/cryptography/ecdsaupgradeable.md)