Verify against LIVE Midnight contract state that a payload hash is attested in an AttestationVault (crawler-free, no txHash needed). Optionally also checks that the anchored content root matches. Returns verified:false (not an error) when absent.

Verify against LIVE Midnight contract state that a ZK predicate proof (e.g. "hidden value <= threshold") was recorded true on-chain. Id-free: works for proofs NIGHTGATE never saw. threshold must be the SAME scaled integer the circuit hashed (scaling mismatch yields verified:false). Supply fieldKey for a field-bound proof, omit it for a plain one.

Verify a server-issued predicate attestation by its NIGHTGATE row id (UUID). Confirms the proving transaction succeeded, with a crawler-free live-state fallback. Use verify_predicate instead when you only have on-chain coordinates.

Verify an anchored document by its NIGHTGATE document id: compares the provided sha256 against the anchored original and confirms the anchoring transaction, with a crawler-free live-state fallback when contractAddress is supplied.

Turn a structured document into everything the proof tools need: canonical JSON and its payloadHash (what anchor_document anchors), a Merkle contentRoot over an ORDERED list of up to 16 proof fields, and per-field inclusion paths ready for prove_field_predicate. Keep the field order stable across anchor and proof: it is part of the tree identity. Compute-only and synchronous, nothing is stored server-side. The returned fields carry witness material (scaled values): treat as sensitive. Store canonicalDocument at your storageRef; re-serializing with different key order will not re-hash equal.

Anchor agent-output provenance on the Midnight chain: "agent X produced output O from input I at time T". Builds the canonical v1 envelope server-side, hashes it and anchors it; the response returns the envelopeJson any third party can re-hash and check via verify_attestation, without trusting this server. Async: returns { jobId, status } immediately; poll get_job_status until succeeded or failed.

Anchor a document content hash on the Midnight chain via the AttestationVault attest circuit. Commits only the sha256 + public metadata; you are responsible for storing the actual bytes at storageRef. Attestation is first-come-first-served per hash. Async: returns { jobId, status } immediately; poll get_job_status until succeeded or failed. Also returns documentId for verify_document.

Issue a zero-knowledge field-bound predicate proof: prove that a hidden field of an anchored document satisfies "value <= threshold" or "value >= threshold" WITHOUT revealing the value. Needs the depth-4 Merkle inclusion path of the field in the anchored content root. value/threshold are scaled integers (decimal strings); the value is a witness and never persisted. If contentRoot is supplied it is anchored first. A false predicate fails at local proving time, nothing is submitted. Async: returns { jobId, status } immediately; poll get_job_status until succeeded or failed.

Batch variant of prove_field_predicate: prove up to 8 field-bound predicates on ONE anchored document in ONE transaction (7 if contentRoot is supplied, since the anchor occupies one call slot). Duplicate claim tuples are dropped server-side. One false predicate aborts the whole batch at local proving time with zero on-chain effect. After submission the chain can finalize a PARTIAL_SUCCESS subset; verify per claim via verify_predicate_attestation instead of assuming all-or-nothing. Async: returns { jobId, status } immediately; poll get_job_status until succeeded or failed.

Grant a disclosure level for an attestation to a grantee identity, on-chain via the AttestationVault. Attester-only: the transaction is rejected in-circuit unless the session wallet is the original attester. level: 0=public, 1=legitimate-interest, 2=authority. Async: returns { jobId, status } immediately; poll get_job_status until succeeded or failed.

Revoke a previously granted disclosure on-chain (removes the grantee entry). Attester-only, enforced in-circuit. Async: returns { jobId, status } immediately; poll get_job_status until succeeded or failed.

Poll the status of an async NIGHTGATE job (all submit actions return a jobId). status: pending | running | external_execution | submitted | reconciliation_required | succeeded | failed. Poll every few seconds until succeeded or failed; result carries the job outcome JSON, chainStatus tracks on-chain finalization independently.