An example publisher demonstrating how to use the Pyth Agent websocket API to publish prices to Pyth. Pyth publishers publish their own first party data to the Pyth network. This example is created solely for demonstration/testing purposes and is not used in production by any publisher.

The publisher:

• Looks up the price accounts corresponding to the configured symbols from the on-chain program.
• Based on the configured provider, subscribes to the feeds on Pythnet, or polls the prices from Coingecko.
• Publishes price updates for those symbols in response to notify_price_sched messages from Pyth Agent.

This requires a running instance of the pyth-agent binary to be running. To set this up, follow the instructions in Pyth Agent repository. This example publisher's publisher.pythd.endpoint configuration value should be set to the pyth-agent websocket endpoint (e.g. ws:https://127.0.0.1:8910).

An example configuration file can be found in config/config.toml. The format of the configuration file is documented here.

Poetry is used to manage the dependencies and run the tests. If you don't have it installed, you can install following the instructions here.

# Install the dependencies
poetry install

# Run the tests
poetry run pytest

# Run the publisher
poetry run example-publisher --config config/config.toml