Onboarding

1. Provisioning: the platform assigns merchant_no, app_id and product_code, and registers your server egress IP allowlist; you generate an RSA-2048 key pair and register the public key, and receive the platform public key for callback verification. Private keys are never exchanged.
2. Sandbox integration: complete the loop — create → hosted payment / disbursement → callback verification → query reconciliation.
3. Signing acceptance: after passing the sandbox signing acceptance, production is enabled.
4. Go live: your product codes and fees are provided at onboarding and visible under Apps & Keys in the merchant portal.

Integration checklist

• Signing: byte-identical canonical message (use the SDK conformance tests)
• Collection: create returns pay_url; callback verified and answered with success
• Payout: create freezes; terminal callback received; fail_reason handled
• Balance: per-currency queries
• Idempotency: identical retries return the original order; duplicate callbacks processed once