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2644d5e52d
Map EDR invoices onto the MoR EIMS /v1/register document and add the cryptographic transport needed to talk to core.mor.gov.et. Mapper: DTOs mirror the supplied Postman collection section by section. Tax is resolved per line via a caller-supplied resolver and throws when unresolved -- the app models no tax at all (invoice.taxAmount is always 0, invoice_lines and the rate catalogue carry no fiscal columns), so a zero-rated default would assert a tax position the codebase cannot support. Seller identity, document number, counters and previous IRN are passed in explicitly; the mapper stays pure. Transport: config, credential loading, RSA-SHA512 signing and /auth/login with an in-memory token cache. Signing reproduces the process that produced a working live token -- compact JSON of the inner request only, exact UTF-8 bytes, base64 signature, and base64 of the certificate file's exact bytes with no parsing or re-encoding. Concurrent callers share one login via an in-flight promise. Refresh is deliberately unimplemented: the collection shows an unsigned refresh body but also ships unsigned examples of calls that do require signing, so an expired token re-logs in instead. Errors normalise to EimsApiException carrying only the gateway's own error fields; secrets, signature, certificate and tokens never reach logs. Key and certificate file patterns are gitignored. Nothing calls EIMS automatically and no invoice entity, migration or UI is touched. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>