Grant application - Zcash SeedSigner, a DIY open source air gapped signer for shielded ZEC (resubmission)

Hi everyone, I am resubmission of the Zcash SeedSigner proposal, after the discussion in the minutes thread: Grant Application - Zcash SeedSigner: DIY open source air gapped signer for shielded ZEC · Issue #429 · ZcashCommunityGrants/zcashcommunitygrants · GitHub

Previous application (declined 9/14): Grant Application - Zcash SeedSigner: DIY open source air gapped signer for shielded ZEC · Issue #411 · ZcashCommunityGrants/zcashcommunitygrants · GitHub
Committee discussion and my replies: Zcash Community Grants Meeting Minutes 9/14/2026 - #3 by AngelCastilloB

What changed:

  • 30,000 USD instead of 65,000.
  • No dependency on ZODL. Interop means “works with released Zodl builds over the transport Zodl already ships”, that is the milestone 2 acceptance test, and any wallet side change is out of scope.
  • The custody model is spelled out with the trade offs of each side.
  • Shielded assets are named explicitly in the signing and clear signing milestones.

Happy to answer any questions here :folded_hands: