[#1924] Add zcash_voting dependency foundation#1934
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This was referenced May 8, 2026
Bring the Android Rust backend onto the released zcash_voting dependency line needed for shielded voting while keeping the initial JNI surface intentionally narrow. The exposed VotingRustBackend.computeShareNullifier symbol is a pure linkage check over caller-supplied bytes. It proves Android can resolve, link, and dispatch into zcash_voting without adding wallet database access, voting database lifecycle, PIR or tree-sync networking, or a public SDK voting API. orchard is pinned to =0.13.1 with the unstable-voting-circuits feature enabled, matching the Swift foundation split shape. No fork URLs or patch entries are introduced. Document voting dependency sources Rephrase voting dependency comments
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Refs #1924.
Resolves MOB-1109
Associated issue: zodl-inc/zodl-android#2193.
Android analogue of zcash/zcash-swift-wallet-sdk#1699.
Summary
zcash_voting 0.5.3tobackend-libwith default features disabledorchardto=0.13.1withunstable-voting-circuitsVotingRustBackend.computeShareNullifier, to prove dispatch intozcash_votingsdk-lib, matching the umbrellashielded-voteimplementationcomputeShareNullifierwith the umbrella signature:(voteCommitment, shareIndex, blind)Cargo.lockandCHANGELOG.mdNon-goals
Testing
cargo fmt --manifest-path backend-lib/Cargo.toml --checkcargo check --manifest-path backend-lib/Cargo.toml --locked./gradlew :backend-lib:compileReleaseKotlin :sdk-lib:compileReleaseKotlingit diff --check