Topics.java

package com.checkout.paymentgw.events;

/**
 * Stable Kafka topic names. Centralised so producers and consumers don't drift.
 */
public final class Topics {

    private Topics() {}

    /** All payment lifecycle events. Keyed by paymentId for per-aggregate ordering. */
    public static final String PAYMENTS_EVENTS = "payments.events";

    /** Audit trail of fraud decisions. Keyed by paymentId. */
    public static final String FRAUD_DECISIONS = "fraud.decisions";
}