dbluhm / mqtt-didcomm-bridge

Super simple MQTT to DIDComm bridge

MQTT to DIDComm Bridge

This is a very simple example of a DIDComm aware MQTT client.

Typically, IoT devices are incapable of participating in DIDComm due to lacking the necessary crypto primitives on many devices (the ESP8266 family is a widely used example of WiFi/Bluetooth capable but ECC incapable devices). A bridge such as this one can be used to fill this gap.

The bridge retrieves the key and endpoint of the intended DIDComm recipient from the environment, subscribes to all topics, then emits a DIDComm message for each received message, with the payload and topic included in the message contents.

Quickstart

Requirements:

• Python 3.6 or higher
• A running MQTT broker

Install

Create a python virtual environment and install dependencies:

$ python3 -m venv env
$ source env/bin/activate
$ pip install -r requirements.txt

Start the example receiver:

$ python receiver.py

And note the printed verkey.

Start the bridge:

$ MQTT_HOST="hostname" \
	THEIR_VK="<verkey from receiver>" \
	ENDPOINT="http://<receiver host>:<receiver port>" \
	python bridge.py