Seraphis Wallet PoC 2 funding proposal

seraphis-wallet-poc-2.md

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+---
+layout: fr
+title: "koe: Seraphis Wallet Proof-of-Concept 2"
+author: koe
+date: 1 May 2022
+amount: 155
+milestones:
+  - name: PoC
+    funds: 100% (155 XMR)
+    done: 
+    status: unfinished
+payouts:
+---
+
+## Intro
+
+Hi all, I [closed out](https://repo.getmonero.org/monero-project/ccs-proposals/-/merge_requests/290#note_16046) my previous [Seraphis Wallet PoC CCS](https://repo.getmonero.org/monero-project/ccs-proposals/-/merge_requests/290) after consuming all the hours. There are additional tasks I would like to work on. For background on this CCS, please see the links in the previous sentence.
+
+
+## Continuing work
+
+Here are the tasks I hope to finish by the end of this CCS. As before, these will be implemented in my [seraphis_lib](https://github.com/UkoeHB/monero/tree/seraphis_lib) branch.
+
+- Add tx builder plumbing for _discretized_ tx fees (see the [04/20/22 MRL meeting](https://github.com/monero-project/meta/issues/691) for a discussion).
+- Consider using 16-byte address indices (instead of 7), with 2-byte encoded address index MACs (instead of 1).
+- Implement a robust 'input selection' solver that takes advantage of statically-determinable tx weights.
+- Implement a maximally-efficient and generic enote-scanning workflow.
+- 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%).
+- Miscellaneous code cleanup (mostly update/add comments, cleanup TODOs).
+
+As usual, 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 more review/work on multisig security patches, among other things).
+
+
+## Funding
+
+- Rate: 50 USD + 0.2 XMR
+- Hours: 16 weeks @ 20hr/wk = 320hrs
+- XMR equivalent: 64 + (50\*320)/USD\_EXCHANGE\_RATE XMR
+- USD\_EXCHANGE\_RATE: set from 14-day EMA on a major exchange
+  - 175 USD/XMR at 0100 UTC 05/16/2022 w/ 14-day EMA on Kraken -> 155 XMR total
+
+If I require more time, and the community supports it, then I may make another proposal to extend the hours.