mithril_client/

lib.rs

#![warn(missing_docs)]
#![cfg_attr(docsrs, feature(doc_cfg))]

//! Define all the tooling necessary to manipulate Mithril certified types from a
//! [Mithril Aggregator](https://mithril.network/rust-doc/mithril_aggregator/index.html).
//!
//! It handles the different types that can be queried to a Mithril aggregator:
//!
//! - [Cardano Database v1 (aka Snapshot)][snapshot_client]: list, get, download archive and record statistics.
//! - [Cardano Database v2][cardano_database_client] list, get, download archive and record statistics.
//! - [Cardano transactions][cardano_transaction_client] list & get snapshot, get proofs.
//! - [Cardano stake distribution][cardano_stake_distribution_client] list, get and get by epoch.
//! - [Mithril stake distribution][mithril_stake_distribution_client] list and get.
//! - [Certificates][certificate_client] list, get, and chain validation.
//!
//! The [Client] aggregates the queries of all of those types.
//!
//! **NOTE:** Snapshot download and Certificate chain validation can take quite some time even with a fast
//! computer and network.
//! For those a feedback mechanism is available, more details on it in the [feedback] submodule.
//!
//! # Example
//!
//! Below is an example describing the usage of most of the library's functions together:
//!
//! **Note:** _Snapshot download and the compute snapshot message functions are available using crate feature_ **fs**.
//!
//! ```no_run
//! # #[cfg(feature = "fs")]
//! # async fn run() -> mithril_client::MithrilResult<()> {
//! use mithril_client::{ClientBuilder, MessageBuilder};
//! use std::path::Path;
//!
//! let client = ClientBuilder::aggregator("YOUR_AGGREGATOR_ENDPOINT", "YOUR_GENESIS_VERIFICATION_KEY").build()?;
//!
//! let snapshots = client.snapshot().list().await?;
//!
//! let last_digest = snapshots.first().unwrap().digest.as_ref();
//! let snapshot = client.snapshot().get(last_digest).await?.unwrap();
//!
//! let certificate = client
//!     .certificate()
//!     .verify_chain(&snapshot.certificate_hash)
//!     .await?;
//!
//! // Note: the directory must already exist, and the user running the binary must have read/write access to it.
//! let target_directory = Path::new("/home/user/download/");
//! client
//!     .snapshot()
//!     .download_unpack(&snapshot, &target_directory)
//!     .await?;
//!
//! if let Err(e) = client.snapshot().add_statistics(&snapshot).await {
//!     println!("Could not increment snapshot download statistics: {:?}", e);
//! }
//!
//! let message = MessageBuilder::new()
//!     .compute_snapshot_message(&certificate, &target_directory)
//!     .await?;
//!
//! assert!(certificate.match_message(&message));
//! #    Ok(())
//! # }
//! ```
//!
//! ## Optional Features
//!
//! The following are a list of [Cargo features](https://doc.rust-lang.org/stable/cargo/reference/manifest.html#the-features-section) that can be
//! enabled or disabled:
//!
//! - **fs**: Enables file system related functionalities.
//! - **unstable**: Enables experimental or in-development `mithril-client` features that may change.
//! - **rug-backend** *(enabled by default)*: Enables usage of `rug` numerical backend in `mithril-stm` (dependency of `mithril-common`).
//! - **num-integer-backend**: Enables usage of `num-integer` numerical backend in `mithril-stm` (dependency of `mithril-common`).
//!
//! To allow fine tuning of the http queries, the following [Reqwest](https://docs.rs/reqwest/latest/reqwest/#optional-features) features are re-exported:
//! - **native-tls** *(enabled by default)*: Enables TLS functionality provided by `native-tls`.
//! - **native-tls-vendored**: Enables the `vendored` feature of `native-tls`.
//! - **native-tls-alpn**: Enables the `alpn` feature of `native-tls`.
//! - **rustls-tls**: Enables TLS functionality provided by `rustls`.
//!   Equivalent to `rustls-tls-webpki-roots`.
//! - **rustls-tls-manual-roots**: Enables TLS functionality provided by `rustls`,
//!   without setting any root certificates. Roots have to be specified manually.
//! - **rustls-tls-webpki-roots**: Enables TLS functionality provided by `rustls`,
//!   while using root certificates from the `webpki-roots` crate.
//! - **rustls-tls-native-roots**: Enables TLS functionality provided by `rustls`,
//!   while using root certificates from the `rustls-native-certs` crate.
//! - **enable-http-compression** *(enabled by default)*: Enables compressed traffic with `reqwest`.

macro_rules! cfg_fs {
    ($($item:item)*) => {
        $(
            #[cfg(feature = "fs")]
            #[cfg_attr(docsrs, doc(cfg(feature = "fs")))]
            $item
        )*
    }
}

#[allow(unused_macros)]
macro_rules! cfg_unstable {
    ($($item:item)*) => {
        $(
            #[cfg(feature = "unstable")]
            #[cfg_attr(docsrs, doc(cfg(feature = "unstable")))]
            $item
        )*
    }
}

#[allow(unused_macros)]
macro_rules! cfg_fs_unstable {
    ($($item:item)*) => {
        $(
            #[cfg(all(feature = "unstable", feature = "fs"))]
            #[cfg_attr(docsrs, doc(cfg(all(feature = "unstable", feature = "fs"))))]
            $item
        )*
    }
}

pub mod aggregator_client;
cfg_unstable! {
    pub mod cardano_database_client;
}
pub mod cardano_stake_distribution_client;
pub mod cardano_transaction_client;
pub mod certificate_client;
mod client;
pub mod feedback;
mod message;
pub mod mithril_stake_distribution_client;
pub mod snapshot_client;
cfg_fs! {
    pub mod file_downloader;
}

mod type_alias;
mod utils;

pub use client::*;
pub use message::*;
pub use type_alias::*;

#[cfg(test)]
pub(crate) mod test_utils {
    use std::fs::File;
    use std::io;
    use std::sync::Arc;

    use slog::{Drain, Logger};
    use slog_async::Async;
    use slog_term::{CompactFormat, PlainDecorator};

    pub struct TestLogger;

    #[allow(unused)]
    impl TestLogger {
        fn from_writer<W: io::Write + Send + 'static>(writer: W) -> Logger {
            let decorator = PlainDecorator::new(writer);
            let drain = CompactFormat::new(decorator).build().fuse();
            let drain = Async::new(drain).build().fuse();
            Logger::root(Arc::new(drain), slog::o!())
        }

        pub fn stdout() -> Logger {
            Self::from_writer(slog_term::TestStdoutWriter)
        }

        pub fn file(filepath: &std::path::Path) -> Logger {
            Self::from_writer(File::create(filepath).unwrap())
        }
    }
}