Payment Event Schema

Overview

Payment Event Schema is the formal contract that defines the structure, field types, required attributes, constraints, and semantic meaning of a payment event. The schema covers the event envelope and payload used by producers, brokers, consumers, validators, and documentation tools. Payment Event Schema is closely connected to Payment Event Validation , Payment Event Version , and Payment Event Payload .

Operational implementation normally requires machine-readable definition, semantic documentation, compatibility policy, registry and ownership, and producer and consumer validation. The principal risks include breaking field changes, ambiguous optional fields, schema drift, unregistered variants, and valid structure with wrong meaning.

Payment Event Schema should remain distinct from Payment Event Validation, Payment Event Version, and Payment Event Payload, because each can represent a different stage, record, control, or financial outcome.

Useful measures include schema validation failure rate, compatibility violations, unregistered schema count, consumer upgrade lag, and schema-related incidents. Important failure modes include duplicate or out-of-order delivery, incompatible schemas, lost acknowledgements, unbounded retries, stale consumers, forged messages, and replay that creates a second financial action.

Controls should preserve original payloads, correlation and causation identifiers, delivery attempts, validation results, consumer acknowledgements, and any replay or dead-letter action. The contract should define identifiers, schema and version, authentication, ordering, idempotency, retry behavior, error handling, and the service responsible for authoritative state. For Payment Event Schema, the authoritative record and completion rule should be documented before any irreversible operational, customer, or accounting action is released. Teams using Payment Event Schema should preserve the evidence behind each decision so retries, corrections, support reviews, and audits can reproduce the final outcome.