36 lines
1.2 KiB
Rust
36 lines
1.2 KiB
Rust
//! `download` subcommand - pre-download required parameter files
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//!
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//! `zebrad download` automatically downloads required parameter files the first time it is run.
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//!
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//! This command should be used if you're launching lots of `zebrad start` instances for testing,
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//! or you want to include the parameter files in a distribution package.
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use abscissa_core::{Command, Runnable};
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/// Pre-download required Zcash Sprout and Sapling parameter files
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#[derive(Command, Debug, Default, clap::Parser)]
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pub struct DownloadCmd {}
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impl DownloadCmd {
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/// Download the Sapling and Sprout Groth16 parameters if needed,
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/// check they were downloaded correctly, and load them into Zebra.
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///
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/// # Panics
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///
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/// If the downloaded or pre-existing parameter files are invalid.
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fn download_and_check(&self) {
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// The lazy static initializer does the download, if needed,
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// and the file hash checks.
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lazy_static::initialize(&zebra_consensus::groth16::GROTH16_PARAMETERS);
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}
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}
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impl Runnable for DownloadCmd {
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/// Run the download command.
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fn run(&self) {
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info!("checking if Zcash Sapling and Sprout parameters have been downloaded");
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self.download_and_check();
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}
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}
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