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BER‑TLV/TLV parser for EMV payment data: recursive decode of constructed/primitive tags, hex-string I/O, comprehensive EMV tag dictionary, and rich value explainers and visualizations.
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Declarative, type-safe DSL for defining and parsing bitfield schemas into labeled fields. Supports single-bit flags, multi-bit enums, RFU ranges, parse-time callbacks and fail-fast validation.