Libbitcoin Network

The libbitcoin-network library is a partial implementation of the Bitcoin P2P network protocol. Excluded are all sub-protocols that require access to a blockchain. The libbitcoin-node library extends this P2P networking capability and incorporates libbitcoin-blockchain in order to implement a full node. The libbitcoin-explorer library uses the P2P networking capability to post transactions to the P2P network.



#include <future> #include <bitcoin/network.hpp>  // Send a transaction to a single P2P node. int main(int argc, char* argv[]) { // Decode a base16-encoded Bitcoin transaction.  bc::data_chunk decoded; if (argc < 1 || !bc::decode_base16(decoded, argv[0])) return -1;  // Parse the decoded transaction. const auto tx = bc::chain::transaction::factory_from_data(decoded);  // Configure the P2P network session for best performance. auto settings = bc::network::settings(bc::config::settings::mainnet); settings.outbound_connections = 0; settings.manual_attempt_limit = 3;  // Start a network session. bc::network::p2p network(settings);  // Declare completion signal. std::promise<bc::code> complete;  const auto send_handler = [&complete](const bc::code& ec) { complete.set_value(ec); };  const auto connect_handler = [&complete, &tx, &send_handler]( const bc::code& ec, bc::network::channel::ptr node) { if (ec) complete.set_value(ec); else node->send(tx, send_handler); };  // Connect to the one specified host with retry. network.connect("localhost", 8333, connect_handler);  // Wait for completion and return result. return complete.get_future().get() ? -1 : 0; } 


  • The P2P protocol was originally contained within the libbitcoin library.
  • In late 2014 William Swanson reorganized libbitcoin sources in accordance with the roadmap agreed in Toronto earlier that year. Later sources were moved into the libbitcoin::network namespace.
  • By early 2016 Eric Voskuil completed the version 3 redesign to improve reliability, performance and readability. The namespace was forked into its own repository and integrated with dependent repositories.


See Also on BitcoinWiki