0j(dZddlmZ ddZy)u Duplicate detection for transaction import and manual entry. flag_duplicates() is shared infrastructure — called from: - staging_pipeline.py (Epic 9): detects duplicates across staged + committed transactions - transactions blueprint (Story 3.3): warns on manual duplicate entry Architectural boundary: accepts ONLY plain Python types. No ORM session, no db imports. The caller is responsible for querying the DB and passing fingerprint strings. ) annotationscFt|}|Dcgc]}||vc}Scc}w)u Flag which new fingerprints already exist in the committed/staged set. Args: new_fingerprints: Dedup hashes for transactions being evaluated. existing_fingerprints: Dedup hashes from existing transactions (caller queries the DB within a ±3-day window before calling this). Returns: List[bool] of same length as new_fingerprints. True → this hash exists in existing_fingerprints (probable duplicate). False → not found (safe to commit). )set)new_fingerprintsexisting_fingerprints existing_setfps ;/var/www/html/financials/app/services/duplicate_detector.pyflag_duplicatesr s(",-L)9 :2B,  :: :s N)r list[str]rr returnz list[bool])__doc__ __future__rr r rs. #;;$;;r