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The [https://github.com/libbitcoin/libbitcoin-network libbitcoin-network] library is a partial implementation of the [[Protocol_documentation|Bitcoin P2P network protocol]]. Excluded are all sub-protocols that require access to a blockchain. The [[Libbitcoin_Node|libbitcoin-node]] library extends this P2P networking capability and incorporates [[Libbitcoin_Blockchain|libbitcoin-blockchain]] in order to implement a [[Full_node|full node]]. The [[Libbitcoin_Explorer|libbitcoin-explorer]] library uses the P2P networking capability to post transactions to the P2P network.

==Example==
#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;
}

==History==
* The P2P protocol was originally contained within the [[Libbitcoin_Common|libbitcoin]] library.

* In late 2014 [[William_Swanson|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|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.

==Dependencies==
* [http://www.boost.org boost]
* [[Libbitcoin_Common|libbitcoin]]

==See Also==
* [[Libbitcoin]]

==Source==

[http://bitcoin.it/ http://bitcoin.it/]
[[Category:Open source]]
[[Category:Software]]

Libbitcoin Network - Revision history

Admin: Created page with "The [https://github.com/libbitcoin/libbitcoin-network libbitcoin-network] library is a partial implementation of the Bitcoin P2P network protocol. E..."