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FR-AI / ANALYSISWhy it is worth attention
It solves the hardest, recurring integration problems for Zimbabwean POS software (certificate lifecycle, stateful fiscal-day cycle, hash chains, canonical signing) in a verified, open-source library, eliminating per-receipt middleware costs.
Who it is for
- Zimbabwean POS/accounting software developers
- Zimbabwean businesses building in-house fiscalization solutions
- Systems integrators handling ZIMRA compliance for multiple clients
- Developers maintaining or migrating existing FDMS integrations
Use cases
- Integrating receipt signing and hash-chain validation into a POS system
- Building an offline sales queue that syncs within the 72-hour grace window
- Automating device registration and certificate renewal with mTLS
- Generating compliant fiscal-day close reports and verification QR codes
Strengths
- Verified live against ZIMRA's FDMS test environment for core operations
- Handles tricky details like ASN.1 DER signatures and canonical signing strings out of the box
- Minimal runtime dependencies (only one, for CSR generation) and zero‑dependency HTTP transport
- Includes regression tests that pin critical behaviors like signing strings and counter accumulation
Considerations
- Requires Node.js 18+ and a single runtime dependency (@peculiar/x509)
- State (hash chain, counters) must be manually persisted and restored across restarts
- Assumes familiarity with ZIMRA FDMS concepts and test portal workflows
README quick start
Quick start
Description
TypeScript SDK for ZIMRA FDMS fiscalisation — direct device registration, mTLS, receipt signing, fiscal days, offline queue, QR codes
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