Pay-for-Elgamal-decryption-key and its application to Anonymous Credentials by Joe Miyamot.
A very interesting application of the #WabiSabi key verified anonymous credentials to facilitate dicrete log contracts.
The author really gets the flexible usecase of Wabisabi credentials.
https://lists.linuxfoundation.org/pipermail/lightning-dev/2021-February/002945.html