get-device-code.ts

import {
  GITHUB_APP_SCOPES,
  GITHUB_BASE_URL,
  GITHUB_CLIENT_ID,
  standardHeaders,
} from '~/lib/api-config'
import { HTTPError } from '~/lib/error'
import { fetchGitHub } from '~/lib/upstream-fetch'

export async function getDeviceCode(): Promise<DeviceCodeResponse> {
  const response = await fetchGitHub(`${GITHUB_BASE_URL}/login/device/code`, {
    method: 'POST',
    headers: standardHeaders(),
    body: JSON.stringify({
      client_id: GITHUB_CLIENT_ID,
      scope: GITHUB_APP_SCOPES,
    }),
  })

  if (!response.ok)
    throw new HTTPError('Failed to get device code', response)

  return (await response.json()) as DeviceCodeResponse
}

export interface DeviceCodeResponse {
  device_code: string
  user_code: string
  verification_uri: string
  expires_in: number
  interval: number
}