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Harden RLN Testnet Deployment

Estimated date of completion: 30 Sep 2025

Resources Required for 2025H2:

  • 1 js-waku dev for 4 weeks.
  • 1 core researcher for 6 weeks.

The recent deployment and dogfooding of the new RLN smart contract on Linea Sepolia has unveiled several issues:

  • Attempt to use a JavaScript RLN library in https://rln.waku.org for credential generation led to interop issue with nwaku/zerokit
  • Some zerokit quirk around endianness that is different from Web3 RPC practice
  • Spamming of the contract due to "free mint" of the Sepolia ERC-20 token (representing DAI for test purposes)

With this milestone, we tackle the lesson learned from dogfooding by:

  • Using zerokit in the browser, and working with Vac-ACZ team to reach adequate UX
  • Apply restrictions on testnet contract to allow dogfooding, without exhausting the rate limit due to the fact that testnet is free (as in cheap).

Strategic Objective

Logos Vision: Core Values Alignment

FURPS

Risks

Risk (Accept, Own, Mitigation)
Smart contract Changes Iterative delivery of smart contract changes to allow dogfooding without excessive smart contract logic
Zerokit Close collaboration with Vac-ACZ and clear expression of requirements

Deliverables

Zerokit is used in the Browser for Credentials Management

Owner: js-waku

Feature: RLN Membership Management

FURPS:

  • R1. Import and exports are interoperable across all implementations.

Checklist:

  • Specs: link to specs and/or API definition
  • Code: link to GitHub issues/PRs/Epic
  • Dogfood: link to dogfooding session/artefact
  • Docs: links to README.md or docs.waku.org (TBD)

Minting of (Sepolia) ERC-20 Tokens for RLN Deposits is permissioned

Owner: core research

Feature: ERC-20 Testnet Token for RLN Deposit

FURPS:

  • F1. Contract owner can mint tokens to any address for free.

  • F2. White-listed wallet addresses can mint tokens to any address for free.

  • F3. Contract owner can add or remove wallet addresses to the white-list.

  • F4. Eth (Sepolia) is burnt to mint tokens to any address.

  • U1. Token name is TST.

  • +1. Deployed on Linea Sepolia.

  • +2. Used as ERC-20 deposit token for Linea Sepolia RLN smart contract deployment.

Feature: RLN Smart Contract

  • P2. Rate limit variables, in combination with good defaults on software side, enable around 5,000 registrations.

Checklist:

  • Specs: link to specs and/or API definition
  • Code: link to GitHub issues/PRs/Epic
  • Dogfood: link to dogfooding session/artefact
  • Docs: links to README.md or docs.waku.org (TBD)

Minting of (Sepolia) ERC-20 Tokens for RLN Deposits Burns Sepolia Eth

Owner: core research

Feature: ERC-20 Testnet Token for RLN Deposit

FURPS:

  • F3. Eth (Sepolia) is burnt to mint tokens to any address.

  • U2. Usage of Metamask Faucet (usually 0.1 Linea Sepolia Eth) should enable enough TST token minting to acquire 2-3 RLN memberships.

  • +1. Deployed on Linea Sepolia.

  • +2. Used as ERC-20 deposit token for Linea Sepolia RLN smart contract deployment.

Checklist:

  • Specs: link to specs and/or API definition
  • Code: link to GitHub issues/PRs/Epic
  • Dogfood: link to dogfooding session/artefact
  • Docs: links to README.md or docs.waku.org (TBD)