[Milestone] User Pays Own RLN Membership

[fryorcraken]

Milestone: https://github.com/waku-org/pm/milestone/6

Summary

Ref: (A) #102

Enable developers to build application where the users pays for their own credentials.

In this flow, the user pays for their own membership directly with the contract.

In terms of credentials management:

• import and export to encrypted JSON keyfile

Credentials to be generated either with or without seed depending on the context..
E.g. Seeded with Wallet signature to help with recovery.

Finally, in terms of messages sending: ensuring that a user cannot shoot themselves in teh foot by sending too many messages. Likely to happen at a general SDK layer rather than protocol layer.

Justification

This is the simplest and most censorship-resistant usage of RLN where a user interacts directly with the smart contract to start sending messages.

Notes

• More advanced credentials management to be handled with RLN Credentials Security and Multiple Devices

Epics

• js-waku [Epic: js-waku] Provision RLN for light push clients PoC js-waku#2150
• docs:
• QA:

[chair28980]

Scope sign-off during EU-NA PM 2024-02-19.

[fryorcraken]

This is descoped in favour of deliverable "Provision RLN for light push clients PoC" cc @chair28980

[chair28980]

Closing per above comment, placeholder for mentioned Deliverable: #206