> For the complete documentation index, see [llms.txt](https://symmdocs.gitbook.io/frontend-sdk-technical-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://symmdocs.gitbook.io/frontend-sdk-technical-docs/frontend-sdk/core-package/constants.md).

# Constants

You'll most likely interact with the /constants directory if you intend to modify our codebase, as it centralizes the configuration parameters and static variables affecting the application's behavior.

The constants folder acts as a single source for critical blockchain-related data. It includes contract addresses and their corresponding ABIs, parameters unique to different blockchain chains, and token-specific information. Additionally, it houses details about various Web3 providers for network interactions, as well as addresses and other relevant information pertaining to Hedger services. In the following sections, we elaborate on the specifics of each file and directory: