go-rln

Wrappers for kilic/rln along with an implementation for rate-limiting using RLN inspired by the Waku v2 RLN Relay built by Status.

Further research can be found here:

• https://forum.vac.dev/t/vac-3-zk/97
• https://github.com/vacp2p/research/tree/master/rln-research
• https://ethresear.ch/t/semaphore-rln-rate-limiting-nullifier-for-spam-prevention-in-anonymous-p2p-setting/5009

The goal of this is to create a rate-limiter for blockchains where block production is cheap. I started playing around with this after talking to the team at Celestia.

The following architectures require newer versions of glibc.

• x86_64-pc-windows-gnu
• aarch64-unknown-linux-gnu
• x86_64-unknown-linux-gnu
• arm-unknown-linux-gnueabi

This PR will update ubuntu base version on cross. But while it's merged, follow the instructions from here to locally build docker images for those architectures.