Invoice Request

Overview

An invoice request is the structured client message that asks a billing or payment service to create an invoice with specified terms. An invoice request carries the data needed to establish a payment obligation. Fields can include amount, pricing currency, accepted assets, order identifier, description, expiration, callback URL, payer information, fee policy, and metadata used by the merchant. The server should reject ambiguity, normalize only documented fields, and avoid creating an invoice before all validation completes. Changes to Invoice Request should be checked against older clients, stored payloads, enum growth, default behavior, and retry assumptions.

For Invoice Request, metrics should separate transport success from business success. The sender should validate business inputs before transmission, use a stable idempotency or order reference, protect credentials, and store both the request and returned invoice identifier. Decimal precision, currency support, minimum amounts, expiration limits, URL restrictions, and mutually exclusive options can cause validation errors. Client-generated metadata should never silently determine privileged server behavior. Required fields and valid combinations depend on the provider. The Invoice Request contract should define identifiers, validation, authorization, status semantics, errors, limits, and version behavior at the same boundary.

For Invoice Request, the application should preserve a correlation path from request construction through response, asynchronous completion, and final business state.

A successful transport result from Invoice Request should not be interpreted beyond the exact API state documented by the provider.

Observability for Invoice Request should record operation, version, principal, request ID, latency, retry count, error code, and final state without exposing secrets.