Payment gateway simulator host for testing the python-getpaid ecosystem.

The simulator no longer owns provider implementations directly. It starts a generic Litestar host, discovers provider plugins from installed packages, and mounts each provider's API routes and UI flows through entry points.

pip install python-getpaid-simulator

The host only becomes useful when at least one provider package exposing the simulator plugin entry point is installed in the same environment.

Provider packages must expose an entry point in the getpaid.simulator.providers group.

Example from a provider package:

[project.entry-points."getpaid.simulator.providers"]
payu = "getpaid_payu.simulator:get_plugin"

The entry point must resolve to a factory returning a getpaid_simulator.spi.SimulatorProviderPlugin.

The current stable plugin contract requires:

• api_version
• slug
• display_name
• api_handlers
• ui_handlers
• transitions
• load_config(env)
• optional authorize_path_template

The host validates the plugin slug against the entry point name and rejects plugins that do not match getpaid_simulator.spi.SIMULATOR_PLUGIN_API_VERSION.

Plugin loading is controlled by SIMULATOR_PLUGIN_FAILURE_MODE or the CLI flag --plugin-failure-mode.

• warn (default): broken plugins are skipped, the simulator starts in degraded mode, and failed providers appear in logs, /, /sim/status, and the dashboard.
• strict: the first plugin import, factory, compatibility, or config failure aborts startup with PluginLoadError.

Examples:

getpaid-simulator --plugin-failure-mode strict
SIMULATOR_PLUGIN_FAILURE_MODE=warn getpaid-simulator

Provider packages should keep simulator support in an optional dependency group such as simulator, rather than forcing simulator host and Litestar dependencies into normal runtime installs.

Example:

[project.optional-dependencies]
simulator = [
    "python-getpaid-simulator>=3.0.0a4",
    "litestar>=2.0",
]

• Wave 1 storage remains in-memory behind the host storage interface.
• Provider-local simulator code lives in provider repositories, not under getpaid_simulator.providers.

MIT