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//! Proof of Work schemes for onion services
//!
//! Tor supports optional proof-of-work client puzzles, for mitigating denial of
//! service attacks on onion services. This crate implements the specific puzzle
//! algorithms we use, and components for client and service integration.
//!
//! There is infrastructure to support new algorithms over time, but right now
//! only a single algorithm is defined, named [`v1`] and implemented via the
//! `equix` crate.
//!
//! Specification at: <https://spec.torproject.org/hspow-spec/index.html>
//!
//! Individual schemes must be selected with crate features ("pow-v1", or
//! "pow-full" to enable every scheme.) Some Void stub types are provided
//! for functionality that isn't enabled.
mod err;
#[cfg_attr(not(feature = "pow-v1"), path = "pow/v1_stub.rs")]
pub mod v1;
pub use err::{Error, RuntimeError, SolutionError};
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