# domna-fetchers

External API clients. Each fetcher is responsible for one external system — `EpcClientService` for the gov EPC API, `GeospatialFetcher` for Ordnance Survey, `SolarFetcher` for Google Solar, `FuelRatesFetcher` for Ofgem, `CarbonFactorsFetcher` for Defra.

**Boundary**: makes HTTP calls + returns raw or lightly-mapped responses. No DB, no business logic. Modelling services never depend on fetchers — only orchestrators do (per [ADR-0003](../../docs/adr/0003-strict-ingestion-modelling-separation.md)).

## Layout

```
src/fetchers/
├── __init__.py
├── epc_client.py          # wraps backend/epc_client/
├── geospatial.py
├── solar.py
├── fuel_rates_fetcher.py
└── carbon_factors_fetcher.py
```

`backend/epc_client/` will fold into `epc_client.py` during the migration; until then this module re-exports from the legacy location.