Demo · synthetic dataThis is what a substrate-built fintech product looks like running. UI is interactive — click any payment, customer, or mandate to drill in. Data is synthetic but consistent across all views.

← Back to /build

Payment

pi_3PqBejs65sv1clm7ap

Top-up · prepaid balance

succeeded

Amount

€22.28

Method

Card · via Stripe

Created

2026-05-07 23:03:46

Customer

Kai Castro

cust_a842fa82

Emailkai.castro@vendor.example

IBAN hashiban-1c05d02d89c2

KYCverified

Tenantvendor-eu

Tenancy + posture

Tenantvendor-eu

Tenant-gate checkpassed

Stripe webhook signatureverified

Webhook replay window≤ 5 min · enforced

PCI-DSS scopeSAQ-A · no PAN

AI Act Art. 12 logimmutable append-only

Audit chain · 2 events for this payment

View full audit log →

Every event references the FNV-1a hash of the previous event in the global audit chain. Tampering with any event breaks the chain and is detected by the daily integrity job (next run 03:00 UTC).

  1. 23:03:46
    tenant-gateisolation check passed tenant=vendor-eu · row.tenant_id matches session
    prev48aa306ahash11679586
  2. 23:03:46
    stripe.webhookverified signature, ingested pi_3PqBejs65sv1clm7ap · payment_intent.succeeded
    prev7ba5c291hash48aa306a