Grant Application - Hito Hardware Wallet - Zcash Cold Signing (Orchard)

Progress update

Work on Milestone 1 is underway

Completed:

  • Implemented transaction signing in firmware
  • Successfully signed synthetic PCZT transactions
    – orchard
    – sapling
    – transparent
  • Verified signing on both:
    – desktop simulator
    – embedded development board (same hardware constraints as the target device)

Current work:

  • Generating and singing real testnet transactions
  • Building regression tests using testnet transaction data
  • Validating end-to-end transaction flow in the simulator and on the development board

Next steps:

  • Complete testnet transaction validation
  • Run the singing flow against real wallet-generated transactions
  • Port and validate the implementation on the Hito device itself
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