Currencies

This domain owns currency registry validation (model.rs), exact minor-unit FX and fixed prices (pricing.rs), bounded ECB retrieval (rates.rs), native routes (routes.rs), durable fixed-price generation (jobs.rs) and MCP dispatch (capabilities.rs). tests.rs exercises adversarial rates, precision and source currency preservation. Commerce consumers use the exported resolver; providers persist the resolved currency and scale. See the end-to-end guide.