AER-1 corpus vectors / Merkle vectors

one-step-single-receipt

Family: Merkle vectors. Source: base/merkle-vectors.json in the AER-1 corpus published at zambo.dev/aer1/corpus.json (kit 1.5.7, draft-zambo-aer1-26), file SHA-256 8c76473616ba909fab61cdb96d3e432f3e91b322833716d494e7afc92ad13a25.

What this vector covers

One-step workflow: the Section 8.1 leaf digest is itself the merkle_root, no pairing occurs. Added 2026-10-12 at the request of implementer Iman Schrock (Emilia Protocol), whose report identified Sections 8.5/8.7 describing the root over step output hashes where Section 8.1 specifies receipt identifiers. Live workflow 6b6952a5-ab1f-4596-a0b3-a352c137cb41 anchors this vector: the reference server aligned to Section 8.1 on 2026-10-12 and its API now returns this vector's root (7c90f65a...) for the workflow; before the alignment it returned 62780c8f..., the output-hash root.

Rule it exercises

draft-zambo-aer1 Section 8.1 (normative): leaf = SHA-256 over UTF-8 bytes of receipt_id; internal node = SHA-256 over raw 32-byte left || raw 32-byte right; odd node duplicated.

Input

The vector input, exactly as published in the corpus:

{
  "receipt_ids": [
    "4028dabb-3d12-4960-855c-639ce37f14cc"
  ]
}

Expected result

expected_root: 7c90f65aeccd214f8bb583bec76878d5f463d65b9b26c11e07c51dd59be814d5
expected_workflow_verdict: valid

Checks it exercises

Check	Requirement	Why
root	must-pass	The corpus records expected_root as 7c90f65aeccd214f8bb583bec76878d5f463d65b9b26c11e07c51dd59be814d5 for this vector. A correct run must produce this root value.
workflow verdict	must-pass	One-step workflow: the Section 8.1 leaf digest is itself the merkle_root, no pairing occurs. Added 2026-10-12 at the request of implementer Iman Schrock (Emilia Protocol), whose report identified Sections 8.5/8.7 describing the root over step output hashes where Section 8.1 specifies receipt identifiers. Live workflow 6b6952a5-ab1f-4596-a0b3-a352c137cb41 anchors this vector: the reference server aligned to Section 8.1 on 2026-10-12 and its API now returns this vector's root (7c90f65a...) for the workflow; before the alignment it returned 62780c8f..., the output-hash root.

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See the full set in the AER-1 corpus vectors index and the AER-1 corpus checks index, or read the standard itself: draft-zambo-aer1-26.