Function fastifyHandler

fastifyHandler<
    C extends ActionContext = ActionContext,
    I extends z.ZodTypeAny = z.ZodTypeAny,
    O extends z.ZodTypeAny = z.ZodTypeAny,
    S extends z.ZodTypeAny = z.ZodTypeAny,
    Init extends z.ZodTypeAny = z.ZodTypeAny,
>(
    action: Action<I, O, S, any, Init>,
    opts?: FastifyHandlerOptions<C, I>,
): RouteHandlerMethod
Exposes the provided flow (or any action) as a Fastify route handler.

Fastify is not Web Fetch native, so this handler bridges Fastify's request/reply to the Genkit action protocol that runFlow/streamFlow clients expect: it reads { data } from the parsed JSON body, runs the action, and streams chunks back as Server-Sent Events when the caller asks for them (Accept: text/event-stream or ?stream=true).
Type Parameters
- C extends ActionContext = ActionContext
- I extends z.ZodTypeAny = z.ZodTypeAny
- O extends z.ZodTypeAny = z.ZodTypeAny
- S extends z.ZodTypeAny = z.ZodTypeAny
- Init extends z.ZodTypeAny = z.ZodTypeAny
Parameters
- action: Action<I, O, S, any, Init>
- Optionalopts: FastifyHandlerOptions<C, I>
Returns RouteHandlerMethod
Example
```
import Fastify from 'fastify';
import { fastifyHandler } from '@genkit-ai/fastify';

const app = Fastify();
app.post('/simpleFlow', fastifyHandler(simpleFlow));
await app.listen({ port: 8080 });
```
- Defined in index.ts:77