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supabase/examples/edge-functions/README.md
2022-06-02 13:14:26 +08:00

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# Supabase Edge Function Examples
## What are Supabase Edge Functions?
[Supabase Edge Functions](https://supabase.com/edge-functions) are written in TypeScript, run via Deno, and deployed with the Supabase CLI. Please [download](https://github.com/supabase/cli#install-the-cli) the latest version of the Supabase CLI, or [upgrade](https://github.com/supabase/cli#install-the-cli) it if you have it already installed.
## Example Functions
The function examples are located in [`./supabase/functions`](./supabase/functions):
- [`browser-with-cors`](./supabase/functions/browser-with-cors/index.ts): Handle CORS headers for function invocations from browser environments.
- [`select-from-table-with-auth-rls`](./supabase/functions/select-from-table-with-auth-rls/index.ts): Retrieve data from an authenticated user via RLS.
- [`send-email-smtp`](./supabase/functions/send-email-smtp/index.ts): Send an email using SMTP credentials.
- [`stripe-webhooks`](./supabase/functions/stripe-webhooks/index.ts): Handle Stripe Webhooks.
- [`telegram-bot`](./supabase/functions/telegram-bot/index.ts): Webhook handler for Telegram bots using [grammY](https://grammy.dev/).
## Develop locally
- Run `supabase start` (make sure your Docker daemon is running.)
- Run `supabase functions serve your-function-name`
- Run the CURL command in the example function, or use the [invoke method](https://supabase.com/docs/reference/javascript/invoke) on the Supabase client or use the test client [app](./app/).
## Test
This example includes a create-react-app in the [`./app/`](./app/) directory which you can use as a sort of postman to make test requests both locally and to your deployed functions.
### Test locally
- `cd app`
- `npm install`
- `npm start`
Note: when testing locally, the select dropdown doesn't have any effect, and invoke simply calls whatever function is currently served by the CLI.
## Deploy
- Generate access token and log in to CLI
- Navigate to https://app.supabase.com/account/tokens
- Click "Generate New Token"
- Copy newly created token
- Run `supabase login`
- Input your token when prompted
- Link your project
- Within your project root run `supabase link --project-ref your-project-ref`
- Set up your secrets
- Run `supabase secrets set --from-stdin < .env` to set the env vars from your `.env` file.
- You can run `supabase secrets list` to check that it worked and also to see what other env vars are set by default.
- Deploy the function
- Within your project root run `supabase functions deploy payment-sheet`
- In youre [`./app/.env`](./app/.env) file remove the `SUPA_FUNCTION_LOCALHOST` variable and restart your Expo app.
### Test deployed functions
This example includes a create-react-app in the [`./app/`](./app/) directory which you can use as a sort of postman to make test requests both locally and to your deployed functions.
- `cd app`
- `cp .env.example .env`
- Fill in your env vars from https://app.supabase.com/project/_/settings/api
- `npm install`
- `npm start`
## 👁⚡️👁
\o/ That's it, you can now invoke your Supabase Function via the [`supabase-js`](https://supabase.com/docs/reference/javascript/invoke) and [`supabase-dart`](https://supabase.com/docs/reference/dart/invoke) client libraries. (More client libraries coming soon. Check the [supabase-community](https://github.com/supabase-community#client-libraries) org for details).
For more info on Supabase Functions, check out the [docs](https://supabase.com/docs/guides/functions) and the [examples](https://github.com/supabase/supabase/tree/master/examples/edge-functions).