feat: RLN support for Nwaku-Compose

[chair28980]

Requirements:

Add rln metrics in grafana
Mount database volume
Add new flags for rln

migrated from waku-org/nwaku-compose#5

[alrevuelta]

some metrics to add:

• waku_rln_proof_verification_duration_seconds
• waku_rln_proof_generation_duration_seconds
• waku_rln_number_registered_memberships
• waku_rln_invalid_messages_total_total
• waku_rln_spam_messages_total_total

[alrevuelta]

flags:

  --rln-relay=true \
  --rln-relay-dynamic=true \
  --rln-relay-cred-password=password \
  --rln-relay-cred-path=/xxxx.json \
  --rln-relay-tree-path=/data/rln_tree.db \
  --rln-relay-eth-contract-address=0xxxxx  \
  --rln-relay-eth-client-address=ws://xxxxx:9558

optional by now. without them the node will be able to just rely messages, not publish.

• rln-relay-cred-password
• rln-relay-cred-path

[Ivansete-status]

Notice that this feature is in the end being tackled by @gabrielmer 🔥 I re-assing that to him.

[vpavlin]

Maybe this has been discussed, but just my 2c:

• make the whole set of parameters optional by wrapping it in a condition dependent on an env var being set (like certs setup with DOMAIN)
• Allow passing in password, cred-path, and client-address
• I am not sure about contract - that should not change often and if you are developing against different contract, you can always override it in EXTRA_ARGS

WDYT @alrevuelta ?

[gabrielmer]

Weekly Update

• achieved: added RLN flags run_node.sh (including the optional ones), added RLN related environment variables to docker-compose.yml, added RLN metrics' visualizations to Grafana and updated the README to account for the new changes. Improved implementation based on feedback.
• next: test the use of optional parameters, get feedback for new version, and merge as soon as all the comments get addressed

[gabrielmer]

Weekly Update

• achieved: finished addressing feedback
• next: task is blocked until there's an easier method for users to register RLN credentials

[chair28980]

Blocked: Need better/easier way to create RLN credentials.