Fastify JSON Schema example

fastifySchemaExample.ts

fastify.get<{ Querystring: { address: string } }>(
  '/checkAddress',
  {
    schema: {
      querystring: {
        type: 'object',
        properties: {
          postcode: { type: 'string' },
        },
        required: ['postcode'],
      },
    },
  },
  async (req, reply) => {
    reply.type('application/json').code(200)
    return { postCode: req.query.postCode }
  }
)