how is it possible to add OPEN API 3.0.0 features (Callbacks, Examples) in Fastify schema?

[gblok]

.. or extend Fastify schema?

[SkeLLLa]

Could you please be more verbose? Probably adding some examples of what do you want to achieve.

[gblok]

prop examples

  "paths": {
    "/pet": {
      "put": {
        "requestBody": {
          "content": {
            "application/json": {
              "schema": {
                "$ref": "#/components/schemas/Pet"
              },
              "examples": {
                "foo": {
                  "summary": "A foo example",
                  "value": {
                    "name": "bar"
                  }
                },
                "bar": {
                  "summary": "A bar example",
                  "value": {
                    "name": "baz"
                  }
                }
              }
            }
          }
        }
      }
    }
  }
}

spec

[gblok]

callbacks features

 callbacks: {
                myEvent: {
                    '{$request.body#/Callback}': {
                        post: {
                            requestBody: {
                                required: true,
                                content: {
                                    'application/json': {
                                        schema: {
                                            type: 'object',
                                            properties: {
                                                message: {
                                                    type: 'string',
                                                    example: 'Some event happened'
                                                }
                                            },
                                            required: ['message']
                                        }
                                    }
                                }
                            },
                            responses: {
                                200: {
                                    description: 'Your server returns this code if it accepts the callback'
                                }
                            }
                        }
                    }
                }
            },

[SkeLLLa]

That's currently unsupported. However it should be easy to add couple of lines somewhere here:
https://github.com/SkeLLLa/fastify-oas/blob/master/lib/openapi/constructor.js#L170
And here as well for proper documentation and typescript support (with importing CallbackObject type from opeanpi-ts):
https://github.com/SkeLLLa/fastify-oas/blob/master/lib/index.d.ts#L61

So if you would like to send PR, that would be great. If not, I'll try to add this, but couldn't promise that it will be fast.

[gblok]

ok