# Use cases
source: https://developer.mastercard.com/carbon-calculator-china/documentation/use-cases/index.md

This section outlines the core use case and the entire workflow of the file transfer process.

## Carbon Calculator file-based scoring use cases {#carbon-calculator-file-based-scoring-use-cases}

|                                                                             Use case                                                                             |                                 Description                                  |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------|
| [Transaction footprint calculation](https://developer.mastercard.com/carbon-calculator-china/documentation/use-cases/transaction-footprint-calculation/index.md) | The carbon footprint calculation process for file-based scoring methodology. |

## End-to-end file transfer process {#end-to-end-file-transfer-process}

Diagram entire-process-flow

## Error handling {#error-handling}

For more information on possible errors that the service may return, refer to the [Error Codes and Formats](https://developer.mastercard.com/carbon-calculator-china/documentation/file-reference-error-codes/index.md#error-codes-and-formats) section.

## Next steps {#next-steps}

Now that you have an understanding of the different use cases of the service, proceed to the [FAQs](https://developer.mastercard.com/carbon-calculator-china/documentation/support/index.md) section.