Grant Application - hanh - Maintenance and Improvements to Coin Voting

hanh · October 6, 2025, 1:09pm

github.com/ZcashCommunityGrants/zcashcommunitygrants

Grant Application - hanh - Maintenance and Improvements to Coin Voting

opened 11:06AM - 05 Oct 25 UTC

### Terms and Conditions - [x] I agree to the [Grant Agreement](https://9ba4718…c-5c73-47c3-a024-4fc4e5278803.usrfiles.com/ugd/9ba471_f81ef4e4b5f040038350270590eb2e42.pdf) terms if funded - [x] I agree to [Provide KYC information](https://9ba4718c-5c73-47c3-a024-4fc4e5278803.usrfiles.com/ugd/9ba471_7d9e73d16b584a61bae92282b208efc4.pdf) if funded above $50,000 USD - [x] I agree to disclose conflicts of interest - [x] I agree to adhere to the [Code of Conduct](https://forum.zcashcommunity.com/t/zcg-code-of-conduct/41787) and [Communication Guidelines](https://forum.zcashcommunity.com/t/zcg-communication-guidelines/44284) - [x] I understand all milestone deliverables will be validated and accepted by their intended users or their representatives, who will confirm that the deliverables meet the required quality, functionality, and usability for each user story. - [x] I agree that for any new open-source software, I will create a `CONTRIBUTING.md` file that reflects the high standards of Zcash development, using the [`librustzcash` style guides](https://github.com/zcash/librustzcash/blob/main/CONTRIBUTING.md#styleguides) as a primary reference. - [x] I understand when contributing to existing Zcash code, I am required to adhere to the project specific contribution guidelines, paying close attention to any [merge](https://github.com/zcash/librustzcash/blob/main/CONTRIBUTING.md#merge-workflow), [branch](https://github.com/zcash/librustzcash/blob/main/CONTRIBUTING.md#branch-history), [pull request](https://github.com/zcash/librustzcash/blob/main/CONTRIBUTING.md#pull-request-review), and [commit](https://github.com/zcash/librustzcash/blob/main/CONTRIBUTING.md#commit-messages) guidelines as exemplified in the `librustzcash` repository. - [x] I agree to post request details on the [Community Forum](https://forum.zcashcommunity.com/c/grants/33) - [x] I understand it is my responsibility to post a link to this issue on the [Zcash Community Forums](https://forum.zcashcommunity.com/c/grants/33) after this application has been submitted so the community can give input. I understand this is required in order for ZCG to discuss and vote on this grant application. ### Application Owners (@Octocat, @Octocat1) hanh00 ### Organization Name Hanh ### How did you learn about Zcash Community Grants Forum ### Requested Grant Amount (USD) 314000 ### Category Non-Wallet Applications ### Project Lead ```project-lead.yaml Name: hanh Role: developer Background: developer Responsibilities: design, coding, testing ``` ### Additional Team Members ```team-members.yaml None ``` ### Project Summary One year of Maintenance and improvements to the Coin Voting System ### Project Description As we increase the use of coin voting for governance decisions, it becomes increasingly important to have a robust set of tools to make voting easy and foolproof for every coin holder and voting organizer. ### Proposed Problem We have had several coin weighted votes and we have more on the horizon. Though the system proved reliable enough, it is far from being perfect. The user experience is still rough and we have a lot to improve on. ### Proposed Solution A new set of apps that simplify the process for voters and election authorities. In particular, we identified the following pain points: - votes poll coin holders on more than one question, - deploying multiple coin voting authorities require too much coordination - setting up an election requires saving a seed - the voting app has quirks & bugs. Some users have to try multiple times - etc. - ### Solution Format Based on the user feedback from the previous rounds, we intent to rewrite the user facing apps. The core logic of the protocol remains the same, but everything else will be fresh. Also, we will make a rust crate if others want to build their own voting client. ### Dependencies None ### Technical Approach Rust Mobile App, Desktop App Deployment scripts (ansible?) Flutter Front End REST API ### Upstream Merge Opportunities The orchard crate is likely the only upstream crate that will be forked. ### Hardware/Software Costs (USD) 0 ### Hardware/Software Justification N/A ### Service Costs (USD) 2000 ### Service Costs Justification For 1 year of a VPS to host 1 voting authority ### Compensation Costs (USD) 312000 ### Compensation Costs Justification On going rate of a Cryptography expert for a year project. 150 $ * 40h/week * 52 weeks = 312000 This is a maximum charge and monthly time sheets will be provided. The actual roadmap of each quarter will be provided in advance. ### Total Budget (USD) 314000 ### Previous Funding Yes ### Previous Funding Details Coin Voting 2.0 ### Other Funding Sources No ### Other Funding Sources Details N/A ### Implementation Risks Low ### Potential Side Effects None ### Success Metrics Positive feedback from participants and a potential increase in voting participation ### Startup Funding (USD) 2000 ### Startup Funding Justification For the hosting provider ### Milestone Details ```milestones.yaml - Milestone: 1 Amount (USD): 26k Fix major issues with current implementation Technical debt ``` ### Milestone Details ```milestones.yaml - Milestone: 2 Amount (USD): 26k Coin voting Dec for retroactive grants ``` ### Milestone Details ```milestones.yaml - Milestone: 3 Amount (USD): 26k Async mode ``` ```milestones.yaml - Milestone: 4 Amount (USD): 26k TBD ``` ```milestones.yaml - Milestone: 5 Amount (USD): 26k TBD ``` ```milestones.yaml - Milestone: 6 Amount (USD): 26k TBD ``` ```milestones.yaml - Milestone: 7 Amount (USD): 26k TBD ``` ```milestones.yaml - Milestone: 8 Amount (USD): 26k TBD ``` ```milestones.yaml - Milestone: 9 Amount (USD): 26k TBD ``` ```milestones.yaml - Milestone: 10 Amount (USD): 26k TBD ``` ```milestones.yaml - Milestone: 11 Amount (USD): 26k TBD ``` ```milestones.yaml - Milestone: 12 Amount (USD): 26k TBD ```

ZCG · October 19, 2025, 5:52pm

@hanh ZCG has voted to approve this proposal async. The vote will be memorialized in the next ZCG meeting minutes. Congratulations!

To keep the community informed, ZCG requests that you provide monthly updates via the forum in this thread.

Please check your forum inbox for a direct message from FPF with important next steps, including a link to the Milestone Payment Request Form and your unique validation code for submitting payment requests.

hanh · December 19, 2025, 4:45pm

November 2025

Support and bug fixes for the Coinholder-Directed Retroactive Grants Program

Tools and documentation for the deployment of the Election Validators

Zcash Vote Server via Docker

Scale up the number of concurrent elections to support the CDRG
Switch to Rust Async for better concurrency and performance (specially server side)
Add progress bars to voting client
Fix issue with app synchronization
Bug fixes

machinesunmachine · December 20, 2025, 5:25am

Is there a list somewhere of all the polls that are performed via this coin voting system?

dismad · December 20, 2025, 5:41am

Hey I created a list on my recent retro application you can use here. Check under proof of completion section.

machinesunmachine · December 20, 2025, 5:42am

Thanks, cool info!

hanh · December 27, 2025, 3:25am

December 2025 Update - zcvlib: v0.2.0

Latest

hhanh00 released this 1 minute ago

zcvlib-v0.2.0

0a4378b

0.2.0 (2025-12-26)

Features

ABCI application skeleton (#29) (244aef3)
add http client to cometbft engine (#31) (fcad6af)
add more db tables (#6) (3afc00f)
add rocket/rpc server (#34) (10610ea)
cometbft app bin (#33) (6dd0bdc)
compute initial voting power (balance) (#21) (d791478)
create election (#2) (ddb3fac)
db creation (#5) (4b70f91)
detect spends and store them in database (#20) (2ffc0ac)
encrypt ballot data (#24) (f9a932e)
get_blocks (#8) (e5c69e1)
lwd connector (#7) (1740a4a)
parse election and store in db (#10) (f4bbeb8)
scan for notes (#9) (4951e3b)
store ballot in db (#27) (be327b7)
store election seed (#26) (28dec9e)
store incoming notes into db (#13) (05744d2)
try decrypt ballot data (#23) (0f20986)
vote server rpc (#30) (3a47bc9)

Bug Fixes

add data/json column to elections table (#12) (6dd7e9b)
add domain column to questions table (#11) (05704bb)
add domain nullifier column to received notes table (#19) (ea81f5a)
domain hash (#25) (6c2eda0)
move domain hash out of public data since we cannot trust (#3) (8a28895)

hanh · January 24, 2026, 2:40am

January 2026 Update

zcv-setup: 0.1.0

0.1.0 (2026-01-24)

Features

setup: build docker image via github action (#58) (813ed18)
setup: build multi platform vote server docker image (#60) (178a768)
setup: config read/parse (#56) (82430b4)
setup: config read/parse (#57) (00c1aea)
setup: project template (#55) (bb2c743)

zcvlib: 0.3.0

0.3.0 (2026-01-24)

Features

apphash calculation (#44) (a99daaa)
fetch ballots fn (#48) (1125768)
fetch ballots fn (#49) (217cf60)
store ballot in finalize_block (#46) (daf76af)
submit ballot through cometbft (#42) (0d7d7c4)
submit_ballot rpc (#40) (379e047)
tally election ballots test (#52) (bbd6fb9)
tally votes (#50) (869c946)
test for ballots with large amounts (#53) (b59866c)
test for ballots with large amounts (#54) (0ff936b)

Bug Fixes

fetch_ballot with callback instead of returning stream (#51) (3b5594a)
typo (#43) (3ae83e3)
use domain hash for db lookups instead of id (#45) (6580454)

Topic		Replies	Views
Polling Closed: Coinholder Poll to Ratify the Retroactive Grants Program Governance	48	1099	November 9, 2025
Zcash Community Voting Authorities Retroactive Grants	41	549	November 24, 2025
Coin Voting 2.0 Applications	21	1163	February 17, 2025
Polling Closed: Coinholder-Directed Retroactive Grants Program (Q4 Round) Retroactive Grants	41	2129	November 26, 2025
Coin Voting Verification tool Zcash Apps	1	77	December 11, 2024

Grant Application - hanh - Maintenance and Improvements to Coin Voting

November 2025

December 2025 Update - zcvlib: v0.2.0

0.2.0 (2025-12-26)

Features

Bug Fixes

January 2026 Update

0.1.0 (2026-01-24)

Features

0.3.0 (2026-01-24)

Features

Bug Fixes

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