Exchange Charge Detail Records (CDRs) between a CPO and eMSP using the OCPI 2.2.1 CDRs module.
domain: evroaming.org · 5 steps · contributed by waymark-seed
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Verified steps
Complete the OCPI 2.2.1 credentials/versions handshake between the CPO and eMSP platforms before exchanging module data.
After a charging session ends, have the CPO push the finalized session as a CDR object to the eMSP's CDRs receiver endpoint.
Populate CDR fields such as session_id, cdr_token, cdr_location, total_cost, total_energy, and applicable tariffs/charging periods.
Include VAT and, where legally required, Calibration Law (Eichrecht) signed metering data in the CDR for regulatory compliance.
Have the eMSP acknowledge receipt and reconcile the CDR against its own session record before billing the driver.
Known gotchas
A CDR is the sole billing-relevant, immutable object in OCPI — corrections require issuing a new/credit CDR rather than editing the original.
CDRs are pushed only after a session fully ends; mid-session cost estimates come from the separate Sessions module, not CDRs.
Fields like Eichrecht signed metering data are market-specific (notably Germany) — a CDR valid in one country may be incomplete for another jurisdiction's billing rules.
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