Send HMAC / Digital Signatures in Webhooks

[mathgr22]

Is your feature request related to a problem? Please describe.
I need the ability to digitally sign a Webhook due to interaction with third-party software. My digital signature needs to be based off of the post-transformed Webhook body. Currently it is not possible to insert a header after the Webhook body has been transformed.

Describe the solution you'd like
I would like the ability to generate an HMAC digital signature based off of the transformed Webhook body and insert it into the Webhook header before it is sent.

Describe alternatives you've considered
As far as I know there is no work-around to obtain this functionality in WireMock.Net.

[StefH]

https://github.com/orgs/WireMock-Net/discussions/1195