input-output-hk/cardano-slArchived
Cardano Sl
This project is a blockchain node software implementation that maintains a decentralized ledger using the Ouroboros proof-of-stake consensus protocol. It provides a complete environment for operating a distributed record, including a cryptocurrency wallet backend and a peer-to-peer network layer.
The system is distinguished by its use of a UTXO-based ledger model and a diffusion-based state synchronization layer for node communication. It integrates a Public Key Infrastructure with TLS-authenticated communication to secure inter-node traffic and employs hierarchical deterministic key derivation for wallet management.
The software covers a broad range of capabilities, including smart contract execution, block processing, and the management of transaction mempools. It includes a REST API for ledger queries and transaction submission, along with tools for stake pool delegation, protocol update voting, and the orchestration of demo node clusters.
The project provides a command-line interface for node operation and the bootstrapping of network clusters.
Features
- Proof-of-Stake Consensus - Implements the Ouroboros proof-of-stake consensus protocol for secure and decentralized ledger maintenance.
- Blockchain Node Operation - Operates a minimal blockchain instance that maintains a decentralized ledger according to the Ouroboros protocol.
- Decentralized & Blockchain Technologies - Provides a full implementation of a decentralized blockchain ledger using a distributed consensus protocol.
- Blockchain Node Implementations - Implements a full blockchain node that integrates P2P networking with ledger storage and transaction validation.
- Blockchain State Persistence - Persists blockchain blocks and transaction outputs to a key-value store for reliable ledger maintenance.
- Ledger State Management - Manages and persists the global state of the distributed ledger by processing block sequences.
- Proof-of-Stake Delegation - Allows users to assign stake to specific pools to participate in network security and consensus.
- Consensus-Driven Block Production - Produces and validates blocks including mechanisms for hard forks and epoch consolidation.
- Slot Leader Election - Calculates eligible nodes and leaders to determine block production rights within the PoS protocol.
- Blockchain API Gateways - Provides an HTTP API gateway for external clients to query ledger data and submit transactions.
- Blockchain Node APIs - Provides a programmable interface for external software to interact with the blockchain node's state.
- UTXO Models - Utilizes a UTXO-based ledger model to track account balances via unspent transaction outputs.
- Peer-to-Peer Networking - Implements a P2P networking layer for node discovery and data synchronization using a diffusion layer.
- State Synchronization - Implements mechanisms to propagate the global ledger state and transactions across distributed peer-to-peer nodes.
- Inter-Node Consensus Communication - Coordinates communication patterns for exchanging critical consensus and protocol messages between peers.
- Mempool Transaction Validation - Tracks unspent transaction outputs and manages the in-memory pool of transactions awaiting block inclusion.
- Peer Connection Management - Manages the lifecycle of peer connections and data exchange through a diffusion synchronization layer.
- Peer Discovery - Locates other nodes in the decentralized network using a distributed hash table to maintain a peer list.
- Peer-to-Peer State Synchronization - Synchronizes blockchain state across nodes using a peer-to-peer diffusion layer for message propagation.
- Shared Ledger Maintenance - Maintains a global peer-to-peer record of transactions and ledger state across the network.
- Blockchain Transaction Executors - Prepares and broadcasts transaction data to the network for validation and processing.
- Transaction Validation - Validates blockchain transactions and applies them to the ledger or performs rollbacks to ensure consistency.
- Cryptographic Hash Generation - Produces unique fixed-length cryptographic digests to verify the integrity and authenticity of blockchain data.
- Cryptographic Key Management - Manages the generation and storage of cryptographic keys and certificates required for secure network identity.
- Digital Message Signing - Produces digital signatures to prove authorship and verifies them to prevent transaction tampering.
- Hierarchical Deterministic Wallets - Implements a tree-based key structure to derive multiple addresses from a single root seed.
- Hierarchical Deterministic Key Derivations - Implements tree-based key derivation to generate multiple addresses from a single mnemonic seed.
- Cryptocurrency Wallets - Provides a backend for managing private keys, mnemonic seeds, and blockchain addresses.
- Secure Node Networking - Encrypts and authenticates traffic between nodes using TLS certificates and DNS alternatives to secure inter-node communication.
- Block Validation - Handles the creation and validation of blocks within the decentralized ledger.
- Blockchain Transaction Management - Implements the internal processing, queuing, and prioritization of transactions within the blockchain ledger.
- REST API Implementations - Defines RESTful HTTP endpoints for external clients to communicate with the blockchain node.
- Epoch Data Consolidation - Merges block and undo files from older epochs into condensed pairs to reduce disk space usage.
- Blockchain Genesis Initializations - Handles the creation of the initial genesis block and state required to bootstrap the blockchain network.
- Epoch-Based Data Consolidations - Merges block and undo files from previous epochs into condensed pairs to optimize disk space usage.
- Key-Value Persistence Stores - Persists blockchain blocks and transaction outputs to a key-value store for efficient retrieval.
- Blockchain Node Lifecycle Management - Manages the runtime context and startup sequence to initialize and operate the blockchain node.
- Governance-Based Updates - Manages the proposal and voting process for updating network software via decentralized governance.
- Node Performance Monitoring - Provides observability tools specifically designed to monitor the health and performance of blockchain nodes.
- Cluster Bootstrapping - Provides a CLI to initialize and synchronize a cluster of nodes for development and testing.
- Blockchain Node Interfaces - Offers a command-line interface for issuing operational instructions and triggering state changes in a local node.
- Decentralized Cluster Orchestration - Coordinates the startup of multiple nodes, relays, and wallets to simulate a decentralized network environment.
- Node Component Messaging - Coordinates one-way and bi-directional communication between node components using event dispatching threads.
- TLS-Authenticated Node Identity - Secures inter-node traffic using a Public Key Infrastructure and X.509 certificates to verify network identities.
- Bidirectional Message Exchanges - Facilitates one-way transmissions and bi-directional conversations between active workers and passive listeners.
- Network Message Transmission - Transmits serialized protocol data directly through the peer-to-peer diffusion layer for high performance.
- Smart Contract Execution Environments - Provides a runtime environment for executing smart contract scripts to determine transaction validity.
- Network Credential Generation - Produces cryptographic keys, genesis files, and certificates required to initialize and secure the network.
- PKI Management - Defines and generates a Public Key Infrastructure using dedicated tooling for certificate issuance and lifecycle management.
- TLS Certificate Issuance - Creates X.509 certificates for a private key infrastructure with customizable organization and expiration settings.
- Token-Based Voting Systems - Implements a token-based voting mechanism to accept and execute updates to the network protocol.
- Network Launch Automation - Coordinates the automated startup sequence of node binaries and associated wallet software.
- Node State Access Interfaces - Provides interfaces for accessing and analyzing the internal state of a running node for monitoring and debugging.
- Simulated Network End-to-End Tests - Launches groups of nodes in simulated networks to verify stability and the adoption of update proposals.
- Node Status Endpoints - Exposes HTTP endpoints that provide the current operational state and network subscription status of the node.
- Databases and Data - Reference implementation for the Cardano blockchain platform.
