Seraphis Wallet PoC

Intro

Hi all, after the completion of my previous Seraphis PoC CCS, there are additional tasks I would like to work on. For background on this CCS, please see the links in the previous sentence.

New tasks

These tasks will be implemented in my seraphis_lib branch. My ultimate goal is that, once this CCS is complete, I can hand off seraphis_lib to other Monero developers who can start working on/thinking about how to get Seraphis actually used in Monero.

• Build a wallet proof-of-concept that demonstrates all the 'transaction engineering' capabilities and implementation modularity of Seraphis/Jamtis. My goal is to have unit tests representing all the main workflows possible with Seraphis, and all the main wallet implementations necessary (i.e. mock-ups of interfaces that could potentially be developed into full-fledged wallet software).
• Test out using x25519 for enote ECDH instead of ed25519, which may speed up enote scanning by a non-trivial amount (>10%).
• Add validation code and plumbing for tx_extra fields.
• Add tx builder plumbing for tx fees.
• Add multisig tx builders for Seraphis (with unit tests) after the master branch is updated with PR #7877.
• Miscellaneous code cleanup (mostly update/add comments, cleanup TODOs).

I will also lump all the miscellaneous Monero R&D tasks that I work on into this CCS (e.g. in the last period I did a bunch of review/work on multisig security patches, among other things).

Funding

• Rate: 50 USD + 0.2 XMR
• Hours: 8 weeks @ 20hr/wk = 160hrs
• XMR equivalent: 32 + (50*160)/USD_EXCHANGE_RATE XMR
• USD_EXCHANGE_RATE: set from 14-day EMA on a major exchange when merging proposal
  • 162 USD/XMR at 2100 UTC 02/23/2022 w/ 14-day EMA on Kraken -> 81.4 XMR total

If I require more time, and the community supports it, then I may make another proposal to extend the hours.

The PoC Seraphis wallet that will result from this will be an important milestone on Monero's way to successfully implement Seraphis. I am very much looking forward to this and hope this CCS will get published and funded soon.

take my money

This is a great step forward. Looking forward to having this funded, and contributing to that funding.

I fully support the further development of Seraphis. Thank's for the great work.

mentioned in commit 337baf0a

merged

I have consumed all the hours for this CCS (total time: 198hr), so I will be closing this one and making a new one with a more realistic time estimate.

Summary of work done:

• Seraphis multisig tx builders (120hr, this took way longer than expected).
• Deterministic binning for membership proof reference sets (30hr).
• Tx fee plumbing (2hr).
• Tx extra plumbing (5hr).
• Add a 'dummy' self-send enote type to help optimize the third-party scanning workflow (greatly reduces bandwidth requirements for general users) (5hr).
• Planning workflows/algorithms/design (~5-10hr).
• Miscellaneous (minor improvements, code quality, Monero tasks like working on the multisig PRs and reviewing PRs, etc.) (~25-35hr).

mentioned in merge request !314 (merged)

I am very impressed with your article and fully support the further quordle development of Seraphis. This is a huge step forward. Thank you for your post and spirit. moviedle