Hello Zcash Community,
I’m Cem, founder of AdPriva, a privacy-first engagement verification platform.
Some of you may remember my previous grant application from August 2025, a proposal exploring privacy-first advertising using Zcash shielded transactions. That application was declined in September 2025, and the feedback was fair: the team was small, the product was still early, and the scope was too broad for that stage. I want to thank the committee and community members who engaged with that proposal.
This time the proposal is intentionally much narrower in scope.
Instead of asking ZCG to fund AdPriva broadly, I’m proposing a grant to build zcash-micropay, an open-source Rust SDK that makes it easier for developers to add shielded ZEC micropayments to their applications.
The SDK will provide a higher-level interface on top of the librustzcash ecosystem, handling:
-
Orchard address derivation (zcash_keys, ZIP-32)
-
shielded transaction construction (zcash_client_backend)
-
batch payout orchestration
-
lightwalletd integration for broadcasting and sync
The crate will be published to crates.io under an MIT/Apache-2.0 dual license and include documentation, examples, and a CONTRIBUTING.md aligned with librustzcash style guidelines.
AdPriva will serve as the reference implementation and pilot, where users who interact with publisher content receive shielded ZEC micropayments after verified engagement events. This provides a real-world demonstration of the SDK in production.
GitHub Application: Grant Application – Shielded Micropayments SDK for Privacy-Preserving Rewards · Issue #236 · ZcashCommunityGrants/zcashcommunitygrants · GitHub
Happy to answer any questions.