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Rust-native building blocks for the Cardano blockchain ecosystem

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Pallas Logo Pallas Logo

Rust-native building blocks for the Cardano blockchain ecosystem

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Introduction

Pallas is an expanding collection of modules that re-implements common Ouroboros / Cardano logic in native Rust. This crate doesn't provide any particular application, it is meant to be used as a base layer to facilitate the development of higher-level use-cases, such as explorers, wallets, etc (who knows, maybe even a full node in a far away future).

Unboxing

The repository is organized as a Cargo workspace. Each Pallas "building block" lives in its own crate. The root pallas crate serves as an all-in-one dependency that re-exports all of the other modules in an hierarchically organized fashion, using Cargo features to tailor the setup for each use-case.

As already explained, Pallas aims at being an expanding set of components. The following tables describe the currently available crates, as well as the planned ones.

Ouroboros Network

Crates Description
pallas-multiplexer Multithreaded Ouroboros multiplexer implementation using mpsc channels
pallas-miniprotocols Implementation of the Ouroboros network mini-protocols state-machines

Ouroboros Consensus

Crates Description
pallas-leadership Implementation of the slot leadership selection algorithm
pallas-selection Implementation of the consensus chain-selection algorithm

Cardano Ledger

Crates Description
pallas-primitives Ledger primitives and cbor codec for the different Cardano eras
pallas-traverse Utilities to traverse over multi-era block data
pallas-addresses Encode / decode Cardano addresses of any type
pallas-ticking Time passage implementation for consensus algorithm
pallas-applying Logic for validating and applying new blocks and txs to the chain state
pallas-forecasting Ledger forecasting algorithm to be used by the consensus layer

Shared

Crates Description
pallas-crypto Shared Cryptographic primitives
pallas-codec Shared CBOR encoding / decoding using minicbor lib

Etymology

Pallas: (Greek mythology) goddess of wisdom and useful arts and prudent warfare;

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