zcash_workflow

Zcash ledger, first connect:

• Address generation
• Sharing address with host
• Sharing IVK with host //TODO: change to APDU API

Zcash ledger, syncing

• Sharing IVK with host
• Decrypt incoming notes and verification note commitments
• TODO: what to do with matching notes?

Zcash ledger, make shielded transaction phase 1

• Verify outputs on screen
• Verify enough balance
• Put relevant data in flash storage

Zcash ledger, make shielded transaction phase 2

• Host processes everything, uses zcashtools builder
• Host asks ledger for random values to use
• Host initiates builder

Zcash ledger, make shielded transaction phase 4

• Host gives all remaining transaction data
• Ledger does the complete TX_HASH_ALL
• Ledger signs the necessary parts and shares with host
• Host sends transaction blob to network

Zcash ledger, make shielded transaction phase 5

• Finalize tx