From payment proof to audit trail.
V6 starts the compliance-grade evidence layer: every post-payment trust step should become a minimal, reviewable audit event.
SafeGate v5 showed the merchant/API architecture and controlled evidence package. SafeGate v6 defines how that evidence becomes traceable, fail-secure, and ready for future working proof.
30-Second V6 Summary
V6 answers one question: Can SafeGate show what happened after payment in a clean audit trail?
Target flow: payment finalized → receipt proof created → access unlocked → merchant record written → audit event timeline.
1. Why Audit Trail Comes Before Agent-Ready
Agent-ready payment verification is powerful, but it should not be built on vague evidence. First, SafeGate must define a clear audit trail: which event happened, when it happened, what result it produced, and what boundary applies.
Once this trail is clear, AI agents can safely query receipt verification and receive bounded, fail-secure responses.
2. Minimal Audit Event Chain
PAYMENT_FINALIZED
Payment state is finalized in the controlled Pi Testnet flow.
RECEIPT_PROOF_CREATED
Receipt proof is created after payment finalization.
ACCESS_UNLOCKED
Protected digital access is unlocked after verified payment state.
MERCHANT_RECORD_WRITTEN
Merchant-side evidence record is written for review and reconciliation.
RECEIPT_VERIFIED
Merchant or reviewer verifies the receipt state.
EVIDENCE_SUMMARY_READY
Evidence is summarized into a reviewer-facing artifact.
3. Proposed Audit Event Envelope
{
"eventId": "SG-AUDIT-MOCK-001",
"eventType": "PAYMENT_FINALIZED",
"mode": "public_architecture",
"network": "Pi Testnet",
"receiptId": "SG-RCPT-1781465776152",
"orderId": "TP-DEMO-273551",
"actorType": "system",
"result": "OK",
"safeBehavior": "CONTINUE",
"createdAt": "mock_timestamp",
"boundaries": {
"productionApiClaim": false,
"productionApiKeyIssued": false,
"backendSecretExposed": false,
"piMainnetSettlementClaim": false
}
}
4. Audit Trail Design Rules
- Keep each event minimal: event, time, result, boundary.
- No backend secrets, service role keys, wallet passphrases, or access tokens in public artifacts.
- Every failed or ambiguous verification must fail secure.
- Replay and duplicate attempts must be logged as separate audit-relevant outcomes.
- Public evidence should be enough for review, but not enough to leak sensitive merchant/user data.
- Future tamper-evident direction should use hash/signature proof over event summaries.
5. V6 Working Proof Direction
This v6.0 page is a planning gate, not a production API launch. The next V6 stages should move from architecture to stronger working proof, while keeping claims bounded.
v6.1 Working Receipt Verify Endpoint Direction
Define the first backend-supported receipt verification path and what counts as working proof.
v6.2 Edge Case Test Plan
Wrong amount, duplicate payment, delayed callback, replay attempt, ambiguous verification, and rate-limit cases.
v6.3 Evidence Timeline / Audit Viewer
Minimal visual timeline: event, time, result, boundary. No noisy dashboard.
v6.4 Security & Compliance Hardening
Secret rotation direction, rate-limit policy, audit log retention, privacy boundaries, and fail-secure behavior.
v6.5 Agent-Ready Payment Verification
AI agents verify receipts against bounded response contracts and audit trail rules.
v6.6 Selective Disclosure / Reg-Shield Direction
Reviewer/merchant/public visibility layers without exposing unnecessary sensitive data.
6. Public Boundary
SafeGate v6.0 is a public planning gate. It does not claim a production public API, does not issue real API keys, does not create production merchant accounts, does not expose backend secrets, and does not claim Pi Mainnet settlement proof.
Current evidence remains Pi Testnet controlled post-payment trust flow.