JetStreamPublish

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JetStreamPublish = object

Outbound JetStream publish — payload + optional dedupe headers.

Properties

readonly optional expectedLastSeq?: number

Optional expected last sequence — server rejects the publish if the stream’s last seq doesn’t match (optimistic concurrency).

readonly optional headers?: Readonly<Record<string, string>>

Extra headers (free-form).

readonly optional messageId?: string

Optional dedupe id — sent as Nats-Msg-Id header so a re-publish within the stream’s deduplication window is idempotent.

readonly payload: Uint8Array | string

readonly subject: string