algovoi-cancellation-receipt-lite

Open, content-addressed cancellation references for the AlgoVoi substrate. The lite, Apache-2.0 origination tier of the commercial AlgoVoi Cancellation Receipt.

cancellation_ref = "sha256:" + SHA-256(JCS({ cancellation_reason, mandate_ref }))

It content-addresses the cancellation of a spend authority into a deterministic, recomputable reference:

• mandate_ref: the spend authority being cancelled, imported by hash. This is the same mandate_ref Payment Mandate (lite) produces and Spend Guardrail (lite) binds, so the cancellation composes onto the open pre-payment decision chain.
• cancellation_reason: a closed enum: USER_REQUESTED, MERCHANT_REQUESTED, COMPLIANCE_TERMINATED, EXPIRED.

Both fields are byte-load-bearing: change the mandate or the reason and the cancellation_ref diverges, so a cancellation cannot be silently re-pointed to another authority and the reason cannot be swapped. A reason outside the enum, or an empty mandate_ref, is rejected, not hashed.

Use

from algovoi_cancellation_receipt_lite import cancellation_ref

ref = cancellation_ref(
    mandate_ref="sha256:a4f8cb5ee09b29478ac1cc2f468d66e16d3d25f7a229a31d22ad521e11d04d35",
    cancellation_reason="USER_REQUESTED",
)

Lite vs commercial

Adopters (pin → key)

If you build on algovoi-cancellation-receipt-lite, pin ==0.1.0, anchor a canonical cancellation_ref vector hash from cancellation_receipt_lite_v1, and keep the NOTICE, you qualify for a free v0 licence key for algovoi-mandate-auditor. The gate is scripts/check_v0_adoption.py. Apply: email chopmob@gmail.com with your import-by-hash evidence and a copy of the NOTICE.

Conformance

The cancellation_receipt_lite_v1 vector set is published in the public corpus, chopmob-cloud/algovoi-jcs-conformance-vectors, with Python and Node runners. Python and TypeScript reproduce every value byte-for-byte. cn-001, cn-002 and cn-003 cancel mandate_1, the mandate_ref in spend_guardrail_lite_v1.

Apache-2.0. Additive over the frozen canonicalisation substrate; sole AlgoVoi authorship.