medium-fastify-graphql-index2.ts

// src/index.ts
const resolvers = {
    Query: {
        /**
         * Simple resolver to add two numbers
         * @param {object} _
         * @param {number} x  First number
         * @param {number} y Second number
         */
        add: async (_: unknown, {x, y}: { x: number, y: number }): Promise<number> => x + y,
    },
};