SANDBOX e-invoice send flow: VIES buyer check + sanctions + EN 16931 UBL create/validate + Peppol/mandate route + sandbox transport (mock, Recommand playground or e-invoice.be test mode; loopback recipient, nothing reaches a real buyer) + Ed25519-signed evidence receipt
| Network | Scheme | Amount | Pay To |
|---|---|---|---|
| Base | exact | $0.08 USDC | 0xfbbe...714c |