ECDH Circom template

[MisiakGeo]

Description

Hello,

I am currently working on a project that requires implementing elliptic curve Diffie-Hellman (ECDH) functionality using the secp256k1 curve in Circom, specifically to support Ethereum keypairs.

Before attempting to develop this from scratch, I wanted to ask the community:

Has anyone already implemented an ECDH template in Circom that supports secp256k1?
If so, is there an existing repository or resource that you could share?

Details

The implementation would ideally include:

Support for secp256k1, which is used for Ethereum keypairs.
Compatibility with generating shared secrets between private and public keys.
Any optimizations or suggestions for integration with zk-SNARKs or related workflows in Circom.

If no such implementation exists, I am also open to collaborating with others who might be interested in developing this functionality.

Thank you for any insights, suggestions, or resources you can provide!