> 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-4.3.1/utils.md).

# utils

- [Context](https://contracts.synapseprotocol.com/elin/contracts-4.3.1/utils/context.md)
- [Strings](https://contracts.synapseprotocol.com/elin/contracts-4.3.1/utils/strings.md)
- [introspection](https://contracts.synapseprotocol.com/elin/contracts-4.3.1/utils/introspection.md)
- [ERC165](https://contracts.synapseprotocol.com/elin/contracts-4.3.1/utils/introspection/erc165.md)
- [IERC165](https://contracts.synapseprotocol.com/elin/contracts-4.3.1/utils/introspection/ierc165.md)
- [math](https://contracts.synapseprotocol.com/elin/contracts-4.3.1/utils/math.md)
- [SafeMath](https://contracts.synapseprotocol.com/elin/contracts-4.3.1/utils/math/safemath.md)