Python Package

We provide a Python binding of our Native Shared C Library, allowing you to use drasyl in a Pythonic as possible.

Installation

We provide our binding as a Python package hosted on Python Package Index. Therefore you can install it simply by running the following command:

pip install drasyl

Usage

First, we have to initialize a drasyl node and then retrieve the node's identity (please refer to the Getting Started section first, if you're new to working with our DrasylNode):

main.py

from drasyl import *
import time

def on_event(event):
    # code

drasyl_node_init("my-node.conf", on_event)

identity = drasyl_node_identity()
print("My address: %s" % identity.identity_public_key)

It is now time to start the node, wait for it to come online, and then send a message to a peer (keep in mind that you need to adjust the recipient address to a running node. Otherwise, the send will fail):

main.py

from drasyl import *
import time

# code

drasyl_node_start()

print("Wait for node to become online...")
while not drasyl_node_is_online():
    time.sleep(0.05)

recipient = "78483253e5dbbe8f401dd1bd1ef0b6f1830c46e411f611dc93a664c1e44cc054".encode("UTF-8")
payload = "hello there".encode("UTF-8")
drasyl_node_send(recipient, payload)

If the node is no longer needed, it can be shut down. Finally, we need to shut down all threads implicitly spawned by drasyl and tear down the isolate:

main.py

from drasyl import *
import time

# code

drasyl_node_stop()
drasyl_shutdown_event_loop()
thread_tear_down()

Reference

drasyl_node_version

def drasyl_node_version()

Returns the version of the drasyl node currently loaded.

drasyl_set_logger

def drasyl_set_logger(logger)

Sets logger callback function.

Parameters

• logger: Must have the following signature: def console_logger(level, time, message).

drasyl_node_init

def drasyl_node_init(config, listener)

Creates a new DrasylNode.

Parameters

• config: File path to a node configuration. Set to None to use default configuration.
• listener: Callback function for node events. Must have the following signature: def on_event(event).

drasyl_node_identity

def drasyl_node_identity()

Returns the node identity. Must be called after drasyl_node_init.

drasyl_node_start

def drasyl_node_start()

Starts the node. Must be called after drasyl_node_init.

drasyl_node_stop

def drasyl_node_stop()

Stops the node. Must be called after drasyl_node_init.

drasyl_node_send

def drasyl_node_send(recipient, payload)

Sends a message payload to recipient.

Parameters

• recipient: The recipient as 64 hex characters long drasyl address.
• payload: The payload to sent.

drasyl_node_is_online

def drasyl_node_is_online()

Returns True if the node is currently online. Otherwise, False is returned. Must be called after drasyl_node_init.

drasyl_shutdown_event_loop

def drasyl_shutdown_event_loop()

Shutdown all (if any) threads implicitly created that are used by the drasyl node. This operation cannot be undone. After performing this operation, now new node can be started!

Example

A fully functional example can be found in our GitHub Repository.