Grant #152 – Milestone 1 completed: delivery recap
Hi everyone,
First of all nice to meet you, my name is Livio and I am Product Manager on the Coin Integration at Ledger and I will be taking over the work that Abhi did so far as he recently left Ledger.
Following the release announcement on September 23, 2026, we’ve posted the formal completion request for Grant #152 on the grant issue. Here is the same recap, so everyone can see each Milestone 1 deliverable as originally submitted and what we shipped against it.
As detailed in our Orchard → Ironwood deliverable mapping, shielded deliverables are delivered on Ironwood (NU6.3) following ZIP 257; the scope itself is unchanged.
Release references
- Ledger Wallet Desktop 4.21+ and Zcash device app 3.9.4+
- Devices: Nano S Plus, Nano X, Flex, Stax, Nano Gen5
- Announcement: New in Ledger Wallet™: Native Shielded Zcash Support | Ledger
Deliverables
| Deliverable (as submitted) | Delivered |
|---|---|
| Ledger OS | |
| ZIP-32 support at OS level for Orchard address derivation |  Shipped in the following Ledger OS versions:• LNX: 2.7.0 • LNSP: 1.6.0 • Flex: 1.6.0 • Stax: 1.10.0 • Gen5: 1.1.0 Fully rolled out. Ironwood reuses the Orchard key hierarchy, so it applies as-is |
| Pallas and Vesta curve support in the crypto stack | Shipped in the following Ledger OS versions: • LNX: 2.6.0 • LNSP: 1.5.0 • Flex: 1.5.0 • Stax: 1.9.0 • Gen5: 1.0.3 |
| Dedicated security audit of the new crypto and derivation logic | Audit completed by Ledger Donjon |
| Zcash device app | |
| Redeveloped Zcash app supporting transparent and shielded operations | Zcash app 3.9.4+, transparent + shielded (Ironwood) |
| On-device PCZT parsing and validation | Extended to the V6 transaction format and the Ironwood bundle |
| Clear signing for transparent, shielding, deshielding and shielded flows | All four flows: recipient, amount, fee and memo displayed on device |
| Integration with the OS derivation and curve updates | Done |
| Backward compatibility for transparent ZEC + Ledger app review and certification | Transparent flows supported in the same app; app passed Ledger review and is published in the Ledger Wallet catalog |
| Signing of transparent swap transactions | Live, including app-exchange adaptations |
| Security review | Completed by Ledger Donjon, findings remediated before release |
| Ledger Wallet Desktop | |
| Shielded account support: address display, balance sync, transaction history | One account showing transparent and Ironwood balances, sync through zaino, history with memos |
| PCZT-based transaction construction and device signing | Done |
| New TypeScript Ledger Signer for Zcash | Done: LedgerHQ/device-sdk-ts – signer-zcash |
| Send, receive and memo for shielded ZEC | Shield, deshield and private send, private address on the Receive screen, memo support, ZIP 317 fees |
| Testing integration | E2E integration tests and unit tests |
| Transparent ZEC in Swap: UI, partner connection, quotes, transaction crafting | Live with NEAR Intents, MoonPay Trade and Exodus |
Success metrics from the application
- Device app audited, QA’d and released
- Ledger Wallet Desktop release with shielded ZEC support
- Transparent ZEC swap live, end-to-end validated with at least one partner
Out-of-scope items are unchanged from the original application (Nano S, Sapling, Ledger Wallet Mobile, plus the legacy Orchard pool as detailed in the mapping).
We consider Milestone 1 complete and have asked ZCG to proceed with the review, acceptance and payment. Any questions from ZCG will be handled on the grant issue so the record stays public, and we’re happy to answer community questions here as well.
Thanks a lot
Livio | PM Coin Integration