The MSRVs of the component crates are left as-is, partly because our
dependencies don't require us to bump them, and partly because those
crates have no pending changes and are relatively stable. We also plan
to split the component crates out into a separate repository, where it
will be easier to have a separate MSRV.
Closeszcash/librustzcash#759.
* Download sprout parameters in-memory
* Add download_sapling_parameters and deprecate download_parameters
* This avoids confusion between sprout and sapling downloads,
while maintaining backward compatibility.
* Download a single file, rather than parts
* This is more efficient, because TCP adjusts its transfer speed
in the first ~20 seconds of each new connection.
* Only download files if needed, but always check the hashes
* Allow the caller to specify a response timeout
* Stream downloads from server to disk
* Refactor file loads to use the same verifying function as downloads
* Check file sizes to help debug parameter load failures
* Remove downloaded files on error (but leave existing files alone)
* Add a sprout and sapling download example
* Move the download Read impl into its own module
* Derive standard traits on SaplingParameterPaths
* Require features for the load parameters method
We use the `redjubjub` crate for batch validation, because the demo
batch validation API in `zcash_primitives::redjubjub` cannot be used
outside that crate, and using `redjubjub` enables this to be published
as a point release of `zcash_proofs`.
Requires patching three dependencies:
- bellman is pending a new release.
- nom is part of the funty breakage; we are blocking on a new release.
- orchard is in development.
Requires the bundled-prover feature, which enables the
wagyu-zcash-parameters crate and adds around 50 MiB to the overall
binary size. That crate bundles the same Sapling parameter files we
normally obtain from disk, so we constrain them to match the same
hard-coded hashes.
Jack Grigg
Sean Bowe
Kris Nuttycombe
teor
Jack Grigg