What Passed
V9 / V9.1Controlled payment-spine evidence and selected safe negative backend validation passed.
V11 is the next hardening frontier.
V11 does not claim production security is complete. It defines the backend security hardening frontier after V9 controlled Pi Testnet payment-spine evidence, V9.1 safe negative backend validation, and V10 submission-ready positioning.
SafeGate does not process payments. SafeGate verifies what happened after payment.
Architecture is destiny. Security is the boundary.
Current Security Status
| Area | Status |
|---|---|
| Controlled Pi Testnet Payment Spine | PASSED |
| V9.1 Safe Negative Backend Validation | PASSED · 18 / 18 |
| V9.1 Public Review Sync | COMPLETE |
| V10 Submission Readiness | READY FOR REVIEW POSITIONING |
| V11 Security Hardening | DOCUMENTED DIRECTION / NEXT HARDENING FRONTIER |
| Production Security | NOT CLAIMED COMPLETE |
| Formal Third-Party Audit | NOT CLAIMED |
| Security Certification | NOT CLAIMED |
| All Replay / Duplicate Risks Solved | NOT CLAIMED |
What V11 Defines
HARDENING FRONTIERDuplicate, replay, mismatch, timeout, durable-state failure, safe-error, and rate-limit hardening.
What Is Not Claimed
NO OVERCLAIMV11 does not mean production-ready, audited, certified, or risk-free infrastructure.
V11 Security Hardening Targets
- Duplicate approve behavior.
- Duplicate complete behavior.
- Duplicate receipt/evidence behavior.
- Real paymentId replay behavior.
- Real txid replay behavior.
- PaymentId mismatch behavior.
- Public verify mismatched pair behavior.
- Pi API timeout behavior.
- Pi API ambiguous response behavior.
- Backend unavailable behavior.
- Supabase write failure behavior.
- Receipt/evidence integrity implementation.
- Public verify freshness implementation.
- Safe error handling with no internal leakage.
- Rate limiting and abuse resistance.
Core Non-Negotiable Rule
No receipt, no evidence, and no access unlock before backend-verified payment state.
Frontend callback alone must never unlock access. Unknown, missing, ambiguous, duplicate, replayed, mismatched, expired, failed, stale, or unavailable states should fail secure.
V9.1 Validation Already Covered
| Validation Area | Observed Public-Safe Result |
|---|---|
| Invoice creation | Kept access locked. |
| Invoice stage | No receipt/evidence created at invoice stage. |
| Receipt/evidence before verified payment | Rejected safely. |
| Missing invoiceId | Rejected safely. |
| Missing paymentId | Rejected safely. |
| Public verify missing inputs | Rejected safely. |
| Unknown public verify pair | Did not return active verified trust. |
| Selected leak scan | No obvious secret/internal leak terms detected. |
V11 Tests Still Needed
Payment State Abuse
- Same paymentId used twice.
- Same txid used twice.
- PaymentId from another invoice.
- Completed payment replayed into another invoice.
- Approve called twice.
- Complete called twice.
System Failure Cases
- Pi API timeout.
- Pi API ambiguous response.
- Backend timeout.
- Database write failure.
- Receipt write succeeds but evidence write fails.
- Public verify stale or unavailable state.
Safe Error Handling Direction
- Do not expose service role keys.
- Do not expose environment variables.
- Do not expose raw Pi API responses publicly.
- Do not expose stack traces publicly.
- Do not expose raw database errors publicly.
- Do not expose private customer data.
- Do not expose raw paymentId / txid in public verification unless a future public-safe design explicitly permits it.
- Return safe, minimal, deterministic errors for missing, invalid, stale, ambiguous, or unavailable states.
V11 Rate-Limit / Abuse Direction
- Limit invoice creation bursts.
- Limit receipt/evidence creation attempts.
- Limit public verify abuse.
- Limit repeated missing-input probes.
- Limit replay/mismatch probing.
- Use merchant/API-key-aware limits when appropriate.
- Keep safe failure responses even under abuse pressure.
Public Verify Hardening Direction
- Minimum disclosure by default.
- No secrets.
- No raw internal error data.
- No active verified trust for unknown pairs.
- Freshness status should be explicit when implemented.
- Integrity status should be explicit when implemented.
- Revoked, expired, disputed, stale, and unavailable states should be distinguishable when implemented.
V11 Review Links
| Item | Link |
|---|---|
| Main Review Hub | https://www.safegatelabs.xyz |
| V10 Submission Ready | /v10-submission-ready.html |
| V10–V12 Roadmap | /v10-v12-roadmap.html |
| V9 Payment Spine Evidence | /v9-pi-payment-spine-evidence.html |
| V9.1 Backend Validation | /v9-1-backend-behavior-validation.html |
| Pilot Review Index | /pilot-review-index.html |
| V12 Trust-State / Privacy / Web3 | /v12-trust-state-privacy-web3.html |
| Public Repo V11 Plan | SAFEGATE_V11_SECURITY_HARDENING_PLAN.md |
| Security Boundaries | SECURITY_BOUNDARIES.md |
What V11 Does Not Claim
- V11 does not claim production readiness.
- V11 does not claim formal third-party audit completion.
- V11 does not claim security certification.
- V11 does not claim all duplicate/replay risks are solved.
- V11 does not claim all failure modes are implemented and tested.
- V11 does not claim Pi Mainnet settlement.
- V11 does not claim official Pi partnership.
Main V11 Review Question
What breaks first under duplicate callbacks, replay attempts, mismatched identifiers, API ambiguity, database failure, or automated probing?
V11 exists to make those risks explicit and guide the next implementation and validation cycle.
Final V11 Position
SafeGate is currently V10 Submission Ready.
V11 is the documented backend security hardening frontier.
V11 is not a production security certification and not a formal audit.