Grant application

zaino - Stability, Performance & Testing

Evaluation snapshot

Request at a glance

Applicant: hanh
Requested: $50,000
Funding in payment ledger: $50,000.00May reflect a partial approval; excludes refunds and reimbursements.
Status: Approved
Review context: Forum discussion linked1 committee record linked

FPF source evidence

Milestone and disbursement ledger

Read-only milestone and disbursement fields normalized from the FPF grants ledger.

1 ledger row

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Infrastructure · Monthly

1

Recorded row amount$50,000.00

Estimate: Not recorded
FPF “Paid Out” date: 8/27/2026
FPF “ZEC Disbursed”: 62.37 ZEC
FPF “USD Disbursed”: Not recorded
FPF “ZEC/USD” rate: $801.67 / ZEC
FPF ledger status: Completed

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Workflow signals

📋 Grant Application🎯 Milestone 1 Complete👀 Ready For ZCG Review✅ Grant Approved✔️ Grant Complete

Latest committee record

Approved7/6/2026

Data quality and provenanceSource matching, linked-record coverage, and reconciliation diagnostics

Source coverage

Operational context for tracing how this canonical record was assembled.

Source stateGitHub + Sheet

GitHub-Sheet match100%

Primary forum2

Supporting forum0

GitHub labels5

Decision notes1

GitHub workflow labels

5 labels captured as structured grant attributes

📋 Grant Application

Category: Intake
Status: Grant Application
Milestone: -
Observed: 8/27/2026

Open GitHub issue

🎯 Milestone 1 Complete

Category: Milestone
Status: Milestone Complete
Milestone: 1
Observed: 8/27/2026

Open GitHub issue

👀 Ready For ZCG Review

Category: Review
Status: Ready For Zcg Review
Milestone: -
Observed: 8/27/2026

Open GitHub issue

✅ Grant Approved

Category: Decision
Status: Approved
Milestone: -
Observed: 8/27/2026

Open GitHub issue

✔️ Grant Complete

Category: Completion
Status: Grant Complete
Milestone: -
Observed: 8/27/2026

Open GitHub issue

Decision history

1 meeting note linked

Approved7/6/2026

zaino - Stability, Performance & Testing

Approved

This proposal proposes replacing Zaino’s manual locking and deep-clone snapshot pattern with compiler-enforced immutable persistent data structures (HAMT-based Phm and persistent deque HeightDeque), eliminating the compare-and-swap ceremony and snapshot inconsistency risks, alongside performance improvements (lock-free reads, O(1) ingestion) and a four-tool testing suite for reorg and load behavior. Requesting $50,000. Hanh has recused himself from discussion or voting on this proposal. Artkor: From my perspective, this proposal supports Zaino as a critical part of the post-zcashd light wallet infrastructure. Although ZCG has already funded broader Zaino development and release stabilization, this proposal is more specific. It focuses on stability, performance under load, reorg handling, and testing inside Zaino itself. I do not see this as duplication. I see it as practical engineering work that helps move Zaino closer to reliable production use. I also want to note that the forum thread for this proposal includes a one-hour video with a detailed explanation of the work. My vote is to approve. Zerodartz: I’m also happy to approve since Hahn already communicated with the zaino team who are ready to merge these improvements and the performance and stability gains are pretty big for the amount asked and Zaino needs to work as well as possible. Paul: I can say that I would support that and I think it’s very important for that progress to continue. So I would like to vote in favor of this work.

Confidence: 100%
Match method: Direct Source Url
Minutes: Zcash Community Grants (ZCG) Meeting Minutes 7/6/2026

Committee notes

Artkor: From my perspective, this proposal supports Zaino as a critical part of the post-zcashd light wallet infrastructure. Although ZCG has already funded broader Zaino development and release stabilization, this proposal is more specific. It focuses on stability, performance under load, reorg handling, and testing inside Zaino itself. I do not see this as duplication. I see it as practical engineering work that helps move Zaino closer to reliable production use. I also want to note that the forum thread for this proposal includes a one-hour video with a detailed explanation of the work. My vote is to approve.

Zerodartz: I’m also happy to approve since Hahn already communicated with the zaino team who are ready to merge these improvements and the performance and stability gains are pretty big for the amount asked and Zaino needs to work as well as possible.

Paul: I can say that I would support that and I think it’s very important for that progress to continue. So I would like to vote in favor of this work.

Open meeting minutes Open referenced proposal

Forum links

2 primary, 0 supporting

Primary forum thread

Grant Application - zaino - Stability, Performance & Testing

github.com/ZcashCommunityGrants/zcashcommunitygrants Grant Application - zaino - Stability, Performance & Testing opened 03:46AM - 19 Jun 26 UTC hhanh00 ### Terms and Conditions - [x] I agree to the [Grant Agreement](https://9ba4718 … c-5c73-47c3-a024-4fc4e5278803.usrfiles.com/ugd/9ba471...

Confidence: 100%
Forum URL: https://forum.zcashcommunity.com/t/grant-application-zaino-stability-performance-testing/56367

Open forum thread

source: forum_mirror | topicId: 56367 | fetchedAt: 2026-10-20T16:59:29.567Z | categoryId: 33 | mirrorKind: forum_topic | coverageCapped: false | discoveredFrom: ["github_issue_comment:ZcashCommunityGrants/zcashcommunitygrants#328:comment:4789609859","google_sheet_row:1FQ28rDCyRW0TiNxrm3rgD8ai2KGUsXAjPieQmI1kKKg:1164534734:grant-platform:bf75cf8d5225493279f05a97ad8affd1f922257b2c3c256cdd017e6b0c1d0ea2"] | postStreamCount: 9

Primary forum thread

Grant Application - zaino - Stability, Performance & Testing

Confidence: 100%
Forum URL: https://forum.zcashcommunity.com/t/grant-application-zaino-stability-performance-testing/56367/8

Open forum thread

Application source evidence

Primary GitHub, Sheet, and other non-forum source records.

Github Issue

Grant Application - zaino - Stability, Performance & Testing

### Terms and Conditions - [x] I agree to the [Grant Agreement](https://9ba4718c-5c73-47c3-a024-4fc4e5278803.usrfiles.com/ugd/9ba471_f81ef4e4b5f040038350270590eb2e42.pdf) terms if funded - [x] I agree to [Provide KYC information](https:/...

Confidence: 100%
Source ID: ZcashCommunityGrants/zcashcommunitygrants#328

Open source record

Github Issue Comment

Comment on #328: Grant Application - zaino - Stability, Performance & Testing

Please comment with the Forum post when ready and then I'll assign to ZCG for review. Thanks.

Confidence: 100%
Source ID: ZcashCommunityGrants/zcashcommunitygrants#328:comment:4753085823

Open source record

Github Issue Comment

Comment on #328: Grant Application - zaino - Stability, Performance & Testing

[Forum post for reference. ](https://forum.zcashcommunity.com/t/grant-application-zaino-stability-performance-testing/56367)

Confidence: 100%
Source ID: ZcashCommunityGrants/zcashcommunitygrants#328:comment:4789609859

Open source record

Github Issue Comment

Comment on #328: Grant Application - zaino - Stability, Performance & Testing

@hhanh00 it looks like it’s been over a month since your last update on the forum. As a reminder, ZCG requires monthly updates to keep the community informed on progress. Could you please update the community in the next week [on your fo...

Confidence: 100%
Source ID: ZcashCommunityGrants/zcashcommunitygrants#328:comment:5371795994

Open source record

Github Issue Comment

Comment on #328: Grant Application - zaino - Stability, Performance & Testing

Thank you for requesting your milestone 1 payout and congrats on completing your grant. We just sent you 62.37 ZEC at $801.71 USD/ZEC for a total of $50,000 USD. TXID: a89b8232f37455c153cb7bdfab708f0175cd7168e7a6a3a29d9b75e7319ffc43

Confidence: 100%
Source ID: ZcashCommunityGrants/zcashcommunitygrants#328:comment:5441788248

Open source record

Google Sheet Row

zaino - Stability, Performance & Testing

Date Submitted: 6/18/2026 | Proposal Title: zaino - Stability, Performance & Testing | Applicant(s): Hanh | Grant Platform Link: https://github.com/ZcashCommunityGrants/zcashcommunitygrants/issues/328 | Forum Link: https://forum.zcashcommunity.com/t/grant-application-zaino-stability-performance-test

Confidence: 100%
Source ID: 1FQ28rDCyRW0TiNxrm3rgD8ai2KGUsXAjPieQmI1kKKg:1164534734:grant-platform:bf75cf8d5225493279f05a97ad8affd1f922257b2c3c256cdd017e6b0c1d0ea2

Open source record

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Google Sheet Row

zaino - Stability, Performance & Testing

Confidence: 100%
Source ID: 1FQ28rDCyRW0TiNxrm3rgD8ai2KGUsXAjPieQmI1kKKg:803214474:row:817

Open source record