doc: add install and getting started documentation

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acul71
2025-04-08 04:41:56 +02:00
committed by Paul Robinson
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Getting Started
===============
Welcome to py-libp2p! This guide will walk you through setting up a fully functional libp2p node in Python 🚀
Install
-------
The first step is to install py-libp2p in your project. Follow the installation steps in the :doc:`install` guide.
Configuring libp2p
------------------
If you're new to libp2p, we recommend configuring your node in stages, as this can make troubleshooting configuration issues much easier. In this guide, we'll do just that.
Basic Setup
~~~~~~~~~~~
Now that we have py-libp2p installed, let's configure the minimum needed to get your node running. The only modules libp2p requires are a **Transport** and **Crypto** module. However, we recommend that a basic setup should also have a **Stream Multiplexer** configured. Let's start by setting up a Transport.
Transports
^^^^^^^^^^
Libp2p uses Transports to establish connections between peers over the network. Transports are the components responsible for performing the actual exchange of data between libp2p nodes. You can configure any number of Transports, but you only need 1 to start with.
For Python, the most common transport is TCP. Here's how to set up a basic TCP transport:
.. literalinclude:: ../examples/doc-examples/example_transport.py
:language: python
Connection Encryption
^^^^^^^^^^^^^^^^^^^^^
Encryption is an important part of communicating on the libp2p network. Every connection should be encrypted to help ensure security for everyone. As such, Connection Encryption (Crypto) is a recommended component of libp2p.
py-libp2p provides several security transport options:
1. **Noise** - A modern, flexible, and secure protocol for encryption and authentication
2. **SECIO** - The legacy security protocol used in older versions of libp2p
3. **Insecure** - A transport that provides no encryption (not recommended for production use)
For most applications, we recommend using the Noise protocol for encryption:
.. literalinclude:: ../examples/doc-examples/example_encryption_noise.py
:language: python
If you need to use SECIO (for compatibility with older libp2p implementations):
.. literalinclude:: ../examples/doc-examples/example_encryption_secio.py
:language: python
For development or testing purposes only, you can use the insecure transport:
.. literalinclude:: ../examples/doc-examples/example_encryption_insecure.py
:language: python
Multiplexing
^^^^^^^^^^^^
While multiplexers are not strictly required, they are highly recommended as they improve the effectiveness and efficiency of connections. Adding a multiplexer to your configuration will allow libp2p to run several of its internal protocols, like Identify, as well as allow your application to easily run any number of protocols over a single connection.
For Python, we can use mplex as our multiplexer:
.. literalinclude:: ../examples/doc-examples/example_multiplexer.py
:language: python
Running Libp2p
^^^^^^^^^^^^^^
Now that you have configured a **Transport**, **Crypto** and **Stream Multiplexer** module, you can start your libp2p node:
.. literalinclude:: ../examples/doc-examples/example_running.py
:language: python
Custom Setup
~~~~~~~~~~~~
**NOTE: The current implementation of py-libp2p doesn't yet support dnsaddr multiaddresses. When connecting to bootstrap peers, use direct IP addresses instead.**
Once your libp2p node is running, it is time to get it connected to the public network. We can do this via peer discovery.
Peer Discovery
^^^^^^^^^^^^^^
Peer discovery is an important part of creating a well connected libp2p node. A static list of peers will often be used to join the network, but it's useful to couple other discovery mechanisms to ensure you're able to discover other peers that are important to your application.
For Python, you can use the bootstrap list to connect to known peers:
.. literalinclude:: ../examples/doc-examples/example_peer_discovery.py
:language: python
Debugging
---------
When running libp2p you may want to see what things are happening behind the scenes. You can enable debug logging by setting the appropriate log level:
.. code:: python
import logging
# Set debug level for libp2p
logging.getLogger('libp2p').setLevel(logging.DEBUG)
What's Next
-----------
There are a lot of other concepts within `libp2p` that are not covered in this guide. For additional configuration options and examples, check out the :doc:`examples` guide. If you have any problems getting started, or if anything isn't clear, please let us know by submitting an issue!

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@ -3,20 +3,13 @@ py-libp2p
The Python implementation of the libp2p networking stack
Installation
------------
.. code-block:: bash
python -m pip install py-libp2p
.. toctree::
:maxdepth: 1
:caption: General
introduction
quickstart
install
getting_started
release_notes
.. toctree::

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Install
================
Follow the steps below to install `py-libp2p` on your platform.
**Linux / macOS / Windows**
1. Create a Python virtual environment:
.. code:: sh
python -m venv venv
2. Activate the virtual environment:
- **Linux / macOS**
.. code:: sh
source venv/bin/activate
- **Windows (cmd)**
.. code:: batch
venv\Scripts\activate.bat
- **Windows (PowerShell)**
.. code:: powershell
venv\Scripts\Activate.ps1
3. Install `py-libp2p`:
.. code:: sh
python -m pip install libp2p
Usage
-----
Configuration
~~~~~~~~~~~~~~
For all the information on how you can configure `py-libp2p`, TODO.
Limits
~~~~~~~~~~~~~~
For help configuring your node to resist malicious network peers, TODO.
Getting started
~~~~~~~~~~~~~~~~
If you are starting your journey with `py-libp2p`, read the :doc:`getting_started` guide.
Tutorials and Examples
~~~~~~~~~~~~~~~~~~~~~~~
You can find multiple examples in the :doc:`examples` guide that will help you understand how to use `py-libp2p` for various scenarios.

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Quickstart
================
TODO - add quickstart instructions

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import secrets
import multiaddr
import trio
from libp2p import (
new_host,
)
from libp2p.crypto.secp256k1 import (
create_new_key_pair,
)
from libp2p.security.insecure.transport import (
PLAINTEXT_PROTOCOL_ID,
InsecureTransport,
)
async def main():
# Create a key pair for the host
secret = secrets.token_bytes(32)
key_pair = create_new_key_pair(secret)
# Create an insecure transport (not recommended for production)
insecure_transport = InsecureTransport(
# local_key_pair: The key pair used for libp2p identity
local_key_pair=key_pair,
# secure_bytes_provider: Optional function to generate secure random bytes
# (defaults to secrets.token_bytes)
secure_bytes_provider=None, # Use default implementation
)
# Create a security options dictionary mapping protocol ID to transport
security_options = {PLAINTEXT_PROTOCOL_ID: insecure_transport}
# Create a host with the key pair and insecure transport
host = new_host(key_pair=key_pair, sec_opt=security_options)
# Configure the listening address
port = 8000
listen_addr = multiaddr.Multiaddr(f"/ip4/0.0.0.0/tcp/{port}")
# Start the host
async with host.run(listen_addrs=[listen_addr]):
print(
"libp2p has started with insecure transport "
"(not recommended for production)"
)
print("libp2p is listening on:", host.get_addrs())
# Keep the host running
await trio.sleep_forever()
# Run the async function
trio.run(main)

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import secrets
import multiaddr
import trio
from libp2p import (
new_host,
)
from libp2p.crypto.secp256k1 import (
create_new_key_pair,
)
from libp2p.security.noise.transport import PROTOCOL_ID as NOISE_PROTOCOL_ID
from libp2p.security.noise.transport import Transport as NoiseTransport
async def main():
# Create a key pair for the host
secret = secrets.token_bytes(32)
key_pair = create_new_key_pair(secret)
# Create a Noise security transport
noise_transport = NoiseTransport(
# local_key_pair: The key pair used for libp2p identity and authentication
libp2p_keypair=key_pair,
# noise_privkey: The private key used for Noise protocol encryption
noise_privkey=key_pair.private_key,
# early_data: Optional data to send during the handshake
# (None means no early data)
early_data=None,
# with_noise_pipes: Whether to use Noise pipes for additional security features
with_noise_pipes=False,
)
# Create a security options dictionary mapping protocol ID to transport
security_options = {NOISE_PROTOCOL_ID: noise_transport}
# Create a host with the key pair and Noise security
host = new_host(key_pair=key_pair, sec_opt=security_options)
# Configure the listening address
port = 8000
listen_addr = multiaddr.Multiaddr(f"/ip4/0.0.0.0/tcp/{port}")
# Start the host
async with host.run(listen_addrs=[listen_addr]):
print("libp2p has started with Noise encryption")
print("libp2p is listening on:", host.get_addrs())
# Keep the host running
await trio.sleep_forever()
# Run the async function
trio.run(main)

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import secrets
import multiaddr
import trio
from libp2p import (
new_host,
)
from libp2p.crypto.secp256k1 import (
create_new_key_pair,
)
from libp2p.security.secio.transport import ID as SECIO_PROTOCOL_ID
from libp2p.security.secio.transport import Transport as SecioTransport
async def main():
# Create a key pair for the host
secret = secrets.token_bytes(32)
key_pair = create_new_key_pair(secret)
# Create a SECIO security transport
secio_transport = SecioTransport(
# local_key_pair: The key pair used for libp2p identity and authentication
local_key_pair=key_pair,
# secure_bytes_provider: Optional function to generate secure random bytes
# (defaults to secrets.token_bytes)
secure_bytes_provider=None, # Use default implementation
)
# Create a security options dictionary mapping protocol ID to transport
security_options = {SECIO_PROTOCOL_ID: secio_transport}
# Create a host with the key pair and SECIO security
host = new_host(key_pair=key_pair, sec_opt=security_options)
# Configure the listening address
port = 8000
listen_addr = multiaddr.Multiaddr(f"/ip4/0.0.0.0/tcp/{port}")
# Start the host
async with host.run(listen_addrs=[listen_addr]):
print("libp2p has started with SECIO encryption")
print("libp2p is listening on:", host.get_addrs())
# Keep the host running
await trio.sleep_forever()
# Run the async function
trio.run(main)

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import secrets
import multiaddr
import trio
from libp2p import (
new_host,
)
from libp2p.crypto.secp256k1 import (
create_new_key_pair,
)
from libp2p.security.noise.transport import PROTOCOL_ID as NOISE_PROTOCOL_ID
from libp2p.security.noise.transport import Transport as NoiseTransport
from libp2p.stream_muxer.mplex.mplex import (
MPLEX_PROTOCOL_ID,
)
async def main():
# Create a key pair for the host
secret = secrets.token_bytes(32)
key_pair = create_new_key_pair(secret)
# Create a Noise security transport
noise_transport = NoiseTransport(
# local_key_pair: The key pair used for libp2p identity and authentication
libp2p_keypair=key_pair,
# noise_privkey: The private key used for Noise protocol encryption
noise_privkey=key_pair.private_key,
# early_data: Optional data to send during the handshake
# (None means no early data)
early_data=None,
# with_noise_pipes: Whether to use Noise pipes for additional security features
with_noise_pipes=False,
)
# Create a security options dictionary mapping protocol ID to transport
security_options = {NOISE_PROTOCOL_ID: noise_transport}
# Create a muxer options dictionary mapping protocol ID to muxer class
# We don't need to instantiate the muxer here, the host will do that for us
muxer_options = {MPLEX_PROTOCOL_ID: None}
# Create a host with the key pair, Noise security, and mplex multiplexer
host = new_host(
key_pair=key_pair, sec_opt=security_options, muxer_opt=muxer_options
)
# Configure the listening address
port = 8000
listen_addr = multiaddr.Multiaddr(f"/ip4/0.0.0.0/tcp/{port}")
# Start the host
async with host.run(listen_addrs=[listen_addr]):
print("libp2p has started with Noise encryption and mplex multiplexing")
print("libp2p is listening on:", host.get_addrs())
# Keep the host running
await trio.sleep_forever()
# Run the async function
trio.run(main)

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import secrets
import multiaddr
import trio
from libp2p import (
new_host,
)
from libp2p.crypto.secp256k1 import (
create_new_key_pair,
)
from libp2p.peer.peerinfo import (
info_from_p2p_addr,
)
from libp2p.security.noise.transport import PROTOCOL_ID as NOISE_PROTOCOL_ID
from libp2p.security.noise.transport import Transport as NoiseTransport
from libp2p.stream_muxer.mplex.mplex import (
MPLEX_PROTOCOL_ID,
)
async def main():
# Create a key pair for the host
secret = secrets.token_bytes(32)
key_pair = create_new_key_pair(secret)
# Create a Noise security transport
noise_transport = NoiseTransport(
# local_key_pair: The key pair used for libp2p identity and authentication
libp2p_keypair=key_pair,
# noise_privkey: The private key used for Noise protocol encryption
noise_privkey=key_pair.private_key,
# early_data: Optional data to send during the handshake
# (None means no early data)
early_data=None,
# with_noise_pipes: Whether to use Noise pipes for additional security features
with_noise_pipes=False,
)
# Create a security options dictionary mapping protocol ID to transport
security_options = {NOISE_PROTOCOL_ID: noise_transport}
# Create a muxer options dictionary mapping protocol ID to muxer class
# We don't need to instantiate the muxer here, the host will do that for us
muxer_options = {MPLEX_PROTOCOL_ID: None}
# Create a host with the key pair, Noise security, and mplex multiplexer
host = new_host(
key_pair=key_pair, sec_opt=security_options, muxer_opt=muxer_options
)
# Configure the listening address
port = 8000
listen_addr = multiaddr.Multiaddr(f"/ip4/0.0.0.0/tcp/{port}")
# Start the host
async with host.run(listen_addrs=[listen_addr]):
print("libp2p has started")
print("libp2p is listening on:", host.get_addrs())
# Connect to bootstrap peers manually
bootstrap_list = [
"/dnsaddr/bootstrap.libp2p.io/p2p/"
+ "QmbLHAnMoJPWSCR5Zhtx6BHJX9KiKNN6tpvbUcqanj75Nb",
"/dnsaddr/bootstrap.libp2p.io/p2p/"
+ "QmNnooDu7bfjPFoTZYxMNLWUQJyrVwtbZg5gBMjTezGAJN",
]
for addr in bootstrap_list:
try:
peer_info = info_from_p2p_addr(multiaddr.Multiaddr(addr))
await host.connect(peer_info)
print(f"Connected to {peer_info.peer_id.to_string()}")
except Exception as e:
print(f"Failed to connect to {addr}: {e}")
# Keep the host running
await trio.sleep_forever()
# Run the async function
trio.run(main)

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import secrets
import multiaddr
import trio
from libp2p import (
new_host,
)
from libp2p.crypto.secp256k1 import (
create_new_key_pair,
)
from libp2p.security.noise.transport import PROTOCOL_ID as NOISE_PROTOCOL_ID
from libp2p.security.noise.transport import Transport as NoiseTransport
from libp2p.stream_muxer.mplex.mplex import (
MPLEX_PROTOCOL_ID,
)
async def main():
# Create a key pair for the host
secret = secrets.token_bytes(32)
key_pair = create_new_key_pair(secret)
# Create a Noise security transport
noise_transport = NoiseTransport(
# local_key_pair: The key pair used for libp2p identity and authentication
libp2p_keypair=key_pair,
# noise_privkey: The private key used for Noise protocol encryption
noise_privkey=key_pair.private_key,
# early_data: Optional data to send during the handshake
# (None means no early data)
early_data=None,
# with_noise_pipes: Whether to use Noise pipes for additional security features
with_noise_pipes=False,
)
# Create a security options dictionary mapping protocol ID to transport
security_options = {NOISE_PROTOCOL_ID: noise_transport}
# Create a muxer options dictionary mapping protocol ID to muxer class
# We don't need to instantiate the muxer here, the host will do that for us
muxer_options = {MPLEX_PROTOCOL_ID: None}
# Create a host with the key pair, Noise security, and mplex multiplexer
host = new_host(
key_pair=key_pair, sec_opt=security_options, muxer_opt=muxer_options
)
# Configure the listening address
port = 8000
listen_addr = multiaddr.Multiaddr(f"/ip4/0.0.0.0/tcp/{port}")
# Start the host
async with host.run(listen_addrs=[listen_addr]):
print("libp2p has started")
print("libp2p is listening on:", host.get_addrs())
# Keep the host running
await trio.sleep_forever()
# Run the async function
trio.run(main)

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import secrets
import multiaddr
import trio
from libp2p import (
new_host,
)
from libp2p.crypto.secp256k1 import (
create_new_key_pair,
)
async def main():
# Create a key pair for the host
secret = secrets.token_bytes(32)
key_pair = create_new_key_pair(secret)
# Create a host with the key pair
host = new_host(key_pair=key_pair)
# Configure the listening address
port = 8000
listen_addr = multiaddr.Multiaddr(f"/ip4/0.0.0.0/tcp/{port}")
# Start the host
async with host.run(listen_addrs=[listen_addr]):
print("libp2p has started with TCP transport")
print("libp2p is listening on:", host.get_addrs())
# Keep the host running
await trio.sleep_forever()
# Run the async function
trio.run(main)