function makeTRPC<T>() {
  const t = initTRPC.context<Context<T>>().create({
    errorFormatter({shape}) {
      return shape
    },
  })
return t
}

function makeTRPC<T>() {
  const t = initTRPC.context<Context<T>>().create({
    errorFormatter({shape}) {
      return shape
    },
  })
return t
}

const t = makeTRPC<{test: string}>()

const t = makeTRPC<{test: string}>()

import {inferAsyncReturnType} from '@trpc/server'
import type {
  CreateFastifyContextOptions,
  FastifyTRPCPluginOptions,
  // eslint-disable-next-line
} from '@trpc/server/adapters/fastify'

/**
 * Defines your inner context shape.
 * Add fields here that the inner context brings.
 */
export interface CreateInnerContextOptions extends Partial<CreateFastifyContextOptions> {}

export function createContext(config: Partial<FastifyTRPCPluginOptions<any>>) {
  return (outerOptions: CreateFastifyContextOptions) => {
    return createInternalContext((innerOptions) => {
      if (!outerOptions?.req || !outerOptions?.res) {
        return innerOptions
      }
      return {
        ...innerOptions,
        ...config?.trpcOptions?.createContext?.({
          req: outerOptions.req,
          res: outerOptions.res,
        }),
      }
    }, outerOptions)
  }
}

/**
 * Outer context. Used in the routers and will e.g. bring `req` & `res` to the context as "not `undefined`".
 *
 * @see https://trpc.io/docs/context#inner-and-outer-context
 */
async function createInternalContext<T>(
  createContextInner: (opts?: CreateInnerContextOptions) => T,
  opts: CreateFastifyContextOptions,
) {
  const contextInner = createContextInner()
  return {
    ...contextInner,
    req: opts.req,
    res: opts.res,
  }
}

export type Context<T> = inferAsyncReturnType<(opts: T) => Awaited<typeof createContext>>

import {inferAsyncReturnType} from '@trpc/server'
import type {
  CreateFastifyContextOptions,
  FastifyTRPCPluginOptions,
  // eslint-disable-next-line
} from '@trpc/server/adapters/fastify'

/**
 * Defines your inner context shape.
 * Add fields here that the inner context brings.
 */
export interface CreateInnerContextOptions extends Partial<CreateFastifyContextOptions> {}

export function createContext(config: Partial<FastifyTRPCPluginOptions<any>>) {
  return (outerOptions: CreateFastifyContextOptions) => {
    return createInternalContext((innerOptions) => {
      if (!outerOptions?.req || !outerOptions?.res) {
        return innerOptions
      }
      return {
        ...innerOptions,
        ...config?.trpcOptions?.createContext?.({
          req: outerOptions.req,
          res: outerOptions.res,
        }),
      }
    }, outerOptions)
  }
}

/**
 * Outer context. Used in the routers and will e.g. bring `req` & `res` to the context as "not `undefined`".
 *
 * @see https://trpc.io/docs/context#inner-and-outer-context
 */
async function createInternalContext<T>(
  createContextInner: (opts?: CreateInnerContextOptions) => T,
  opts: CreateFastifyContextOptions,
) {
  const contextInner = createContextInner()
  return {
    ...contextInner,
    req: opts.req,
    res: opts.res,
  }
}

export type Context<T> = inferAsyncReturnType<(opts: T) => Awaited<typeof createContext>>