Bitcoin blockchain indexing and wallet notification node. It may be considered electrum server replacement, which is faster, provides modern API (supporting wallet descriptors, LN-specific queries, client-side-validation tech like RGB, modern RPC subscribe interfaces).
The node was originally designed and implemented by Dr Maxim Orlovsky as a part of LNP/BP Standards Association effort for building the foundation for LNP/BP layer 2 and 3 bitcoin application ecosystem. It is based on other LNP/BP projects such as BP Core Lib, BP Standard Lib, BP Wallet Lib and can be easily integrated with the rest of LNP/BP nodes like LNP Node, RGB Node, Storm Node.
In the future it is planned to upgrade the node into a fully-validating bitcoin
node by using bitcoinkernel library for validating blocks.
The node organized as a set of threads, interacting via crossbeam API with each other -- and via Strict RPC with connecting clients. It leverages microservice architecture with I/O Reactor (used instead of async), authentication with self-sovereign identities (SSI) and end-to-end encryption from Cyphernet crates.
The node provides following set of services:
bpd: main service providing clients with RPC request/reply API and managing life cycle of the rest of the node services (launching, terminating, brokering inter-service communications).blockd: service parsing and (in the future, usingbitcoinkernel) validating bitcoin blocks, storing them in the database.mempoold: manages mempool transactions.walletd: service instantiated for each wallet client. It knows about wallet descriptor, monitors new mempool and mined transactions and notifies subscribed client about their changes.watchd: watchtower service for lightning network and RGB.listend: interface listening to Bitcoin Core or an external indexing service (like Esplora), if one is used.
The repository also contains a BP Node RPC library (bp-rpc crate in
rpc directory) and command-line tool (bp-cli crate in
cli directory) for querying/working with the node.