---
url: >-
  https://node-ts.github.io/bus/api/bus-messages/interfaces/DefineMessageOptions.md
---
[API reference](../../index.md) / [@node-ts/bus-messages](../index.md) / DefineMessageOptions

# Interface: DefineMessageOptions

Defined in: [packages/bus-messages/src/define-message-options.ts:4](https://github.com/node-ts/bus/blob/2e6cf65c27833b707ae31ee623cfb6343770f434/packages/bus-messages/src/define-message-options.ts#L4)

Options for `defineCommand` and `defineEvent`

## Properties

| Property | Type | Description | Defined in |
| ------ | ------ | ------ | ------ |
| <a id="property-version"></a> `version?` | `number` | The `$version` of the message's contract **Default** `0` | [packages/bus-messages/src/define-message-options.ts:9](https://github.com/node-ts/bus/blob/2e6cf65c27833b707ae31ee623cfb6343770f434/packages/bus-messages/src/define-message-options.ts#L9) |