{"node":"audit","title":"Audit Trail Node — external anchoring","what":"Anchor a sha-256 hash (or a small JSON record) to IPFS and get back an immutable, publicly verifiable CID.","rules":["Anchor hashes, not raw personal data — IPFS records cannot be deleted.","Optional `record` payload is capped at 8KB; you are responsible for its contents.","Optional `agent` attests who produced the evidence: sign \"nirium-audit-v1:<content_sha256>\" with an ed25519 key (Stellar G address). Invalid signatures are rejected, never anchored."],"pricing":"free during beta (rate-limited)","endpoints":{"log":"POST /api/audit/log","info":"GET /api/audit/info"},"example":{"hash":"sha-256:e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855","tag":"invoice-2026-07"},"attestedExample":{"hash":"sha-256:e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855","agent":{"id":"my-agent","key":"G...","signature":"<base64 ed25519 over nirium-audit-v1:e3b0c442…b855>"}},"network":"mainnet"}