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## Problem
Edge Function examples that use the new publishable/secret API keys read
them with a double lookup:
```ts
const SUPABASE_SECRET_KEYS = JSON.parse(Deno.env.get('SUPABASE_SECRET_KEYS')!)
const secretKey = Deno.env.get(SUPABASE_SECRET_KEYS['default']) // ❌ returns undefined
```
`SUPABASE_SECRET_KEYS` / `SUPABASE_PUBLISHABLE_KEYS` are a JSON object
that maps a key name to the **actual key value** (e.g.
`{"default":"sb_secret_..."}`), confirmed by:
- the self-hosted injection in `docker/docker-compose.yml`
(`SUPABASE_SECRET_KEYS: "{\"default\":\"${SUPABASE_SECRET_KEY:-}\"}"`)
- the `@supabase/server` SDK README
So `SUPABASE_SECRET_KEYS['default']` is already the key. Wrapping it in
another `Deno.env.get(...)` looks up an env var named `sb_secret_...`,
which doesn't exist, so the value is `undefined` and the examples fail
at runtime.
## Fix
Unwrap the outer `Deno.env.get(...)` so the key is read directly:
```ts
const SUPABASE_SECRET_KEYS = JSON.parse(Deno.env.get('SUPABASE_SECRET_KEYS')!)
const secretKey = SUPABASE_SECRET_KEYS['default'] // ✅
```
Applied across 23 files (example functions, the
`examples/prompts/edge-functions.md` codegen guidance, and two docs
guides). The correct `JSON.parse(Deno.env.get('SUPABASE_SECRET_KEYS')!)`
declaration line is untouched. The generated `apps/docs/examples/` copy
regenerates from `examples/` at build time.
## Notes
- Docs context:
[#46600](https://github.com/supabase/supabase/pull/46600), which
documents the same key model.
- Follow-up (not in this PR): a few examples send the secret key on the
`Authorization: Bearer` header, which the new keys reject. Worth a
separate audit.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Documentation**
* Clarified examples and guides for correctly reading parsed Supabase
secret and publishable key maps.
* **Examples**
* Standardized credential usage across Edge Functions and samples so
Supabase clients consistently receive keys from the parsed key maps
rather than indirect lookups.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
---------
Co-authored-by: Chris Chinchilla <chris.ward@supabase.io>
Self-Host Maps on Supabase Storage with Protomaps
Create a static PMTiles Map file
Follow the instructions in the Protomaps docs to extract a my_area.pmtiles file.
Upload to Supabase Storage
- Create a new private bucket called
maps-private. - Upload your
my_area.pmtilesfile there.
Take note of the file size limits depending on your project tier.
Proxy through Edge Functions
You can use Supabase Edge Functions to set up fine grained access controls. Use the /supabase/functions/maps-private/index.ts.
You can also use Edge Functions with Supabase Auth JWTs to only render Maps for authenticated users for example. Read the docs.
- Deploy the function to your Supabase project:
supabase functions deploy maps-private --no-verify-jwt. - Update the
protomaps.urlin the index.html file.
Start simple web server
You can use python to serve the index.html file:
python3 -m http.server
Now navigate to http://localhost:8000/ to see your beauiful Map!