Integrate onchain RLN

[alrevuelta]

The goal is to have integration tests running in CI that use onchain RLN, since by now we just have static RLN, and hence no interactions with the blockchain are being tested.

Tasks:

•  Integrate a tool such as hardhat to deploy our own blockchain.
•  Write some scripts to deploy rln contract there.
•  Use a script to run RLN registrations.

[stubbsta]

Feedback on discussions with team regarding tools to deploy a private ethereum testnet:

-geth is probably overkill for the requirements

-implementation using ganache is present in code:
https://github.com/waku-org/nwaku/blob/c55ca0675656b51fb36a725f45a0963f45068ec5/tests/waku_rln_relay/test_rln_group_manager_onchain.nim#L1

note:

ganache (and truffle) are being deprecated/sunsetted (https://consensys.io/blog/consensys-announces-the-sunset-of-truffle-and-ganache-and-new-hardhat)

-foundry based project can be found here:
https://github.com/vacp2p/rln-contract

note:
<alrevuelta — 16/02/2024 11:55>

"anvil" seems to be the node that "foundry" offers?
https://github.com/foundry-rs/foundry/tree/master/crates/anvil
?

note that for waku-simulator, we dont intend to use to to run smart contract unit tests, which may differ a bit from https://github.com/waku-org/waku-rln-contract

<p1ge0nh8er — 16/02/2024 11:59>

but you can reuse the migration/deployment scripts from there
yarn deploy:localhost_integration will get the job done provided the ganache/anvil/hardhat node has the http rpc port open on 8545

-hardhat project can be found here:
https://github.com/waku-org/waku-rln-contract

[alrevuelta]

Related @stubbsta fyi
waku-org/nwaku#2449

[stubbsta]

We went with the anvil tool (from foundry) to deploy our own blockchain, motivation for this decision is based on general research and this feedback from p1ge0nh8er who has more experience with deploying testnets:
p1ge0nh8er — 21/02/2024 08:07
...
while hardhat is great, foundry/anvil is better in terms of developer support, feature/fix shipping, which is why i use anvil here
we do plan to move https://github.com/waku-org/waku-rln-contract to https://github.com/vacp2p/foundry-template for advanced testing methods, and using anvil here will make sure we don't have any unintended test failures due to version mismatch etc

[stubbsta]

The next step is to deploy a local block explorer to assist with debugging when going forward with the contract deployments on the anvil testnet. Looking at Ethernal which support for Anvil

[stubbsta]

Local blockchain explorer, Chainlens, has been deployed in the simulator (Support/instructions for the Ethernal docker deployment is outdated).
Access to the chainlens UI is at localhost:3001 (it can take quite long to load after the service startup, >5min)

[stubbsta]

Verified that the waku-rln-contract can be successfully deployed on the private anvil blockchain, using "yarn deploy:localhost"