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 §

• RLN Membership Management: R1

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.

• 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:

• F4. 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)