Migrate to latest revision of Zcash crates #1618
Merged
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Explanation
When the Zcash app was added, some modifications to the upstream Zcash Rust crates were needed to enable no-std support. At the time, these changes were blocked on third-party dependency updates, and so the Keystone firmware depended on patched branches. Now, we have crate releases that include the necessary no-std support, so the Keystone firmware can depend on them directly.
Pre-merge check list
How to test
Build whichever firmware versions contain the Zcash app.