Thanks @ZcashGrants
As discussed with the committee, Zondax will not be involved after all. The grant submission will be updated to reflect this decision.
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Thanks, also to be clear, I will not use the Zondax code in order to avoid any potential issue with IP.
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Excellent, looking forward to this one!
@hanh how will not using Zondax work Alter the delivery timeline?
Really pleased to see this was funded, one of the most important things we need for usability/adoption along with the work ECC are doing on syncing, mobile SDK’s etc
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The code is written from the ground up specifically for zcash. It should turn out to be smaller and faster. Therefore, I hope to save time during the integration phase.
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My Ledger app can derive the keys and address internally and display on the device screen.
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Is there any chance this could ever run on a nano S?
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I think it will because my app is smaller than the bitcoin app.
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Quick demo of the import/connect function
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@hanh I’m excited to audit your Ledger code! I’m just wrapping up an audit of the Zondax code so I might have some suggestions that will be useful. I’ll get in touch once I’m done writing up that report. One thing I can say right away is that the more of it that’s Rust, when that’s do-able within the memory constraints, the easier it will be to audit. 
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It is 0% rust.
I posted a video on Ledger app security & scalability. @earthrise This may be of interest to you.
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z2z transactions work now.
They can be as large as you want (if you are patient) and contain memos.
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I wrote up a shielded hardware wallet threat model for my audit of the Zondax code, it’s now public since it should apply to all shielded hardware wallets including this one: A Simple Threat Model for Zcash Shielded Hardware Wallets | ZecSec: Zcash Ecosystem Security
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Here’s a bunch of transactions of various types all made through the Ledger
Links point to a block explorer.
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Good work!
it
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Looking good Hanh! 
Edit: a box of scraps and a grant from your friendly local ZCG. Have a great idea for a project and the skills to bring it to life? Apply for a grant and help the fight to bring privacy to the masses!
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A live demo
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