Functions

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Trusted project code in a time-boxed process. → Functions and secrets

export default async function handler(req) {
  return { status: 200, body: { hello: req.body?.name ?? "world" } };
}

Functions → give it a name, edit the source, Deploy. Then Invoke with a JSON body; the result panel says function answered 200 … for the function’s own answer or cloud answered 5xx … for a Cloud error (timeout, bad output, missing runtime).

hcloud fn deploy prj_… hello ./hello.js
hcloud fn list   prj_…
hcloud fn invoke prj_… hello '{"name": "cli"}'        # status on stderr, body on stdout
hcloud fn rm     prj_… hello

curl -X PUT $ORIGIN/v0/projects/$PRJ/functions/hello -H "Authorization: Bearer $TOKEN" \
  -H 'Content-Type: text/javascript' --data-binary @hello.js
curl -X POST $ORIGIN/v0/projects/$PRJ/functions/hello/invoke -H "Authorization: Bearer $TOKEN" \
  -H 'Content-Type: application/json' -d '{"name":"curl"}' -i
# the function's own answer carries an X-Hyphae-Function header

await cloud.functions.deploy(project.id, "hello", source);
const res = await cloud.functions.invoke(project.id, "hello", { name: "app" });   // the function's own answer
// from an application, with a project key:
const data = cloud.data(project.id, { key });
await data.invoke("hello", { name: "app" });

Names: a-z 0-9 _, up to 40 characters. Source ≤ 512 KiB; invoke body ≤ 32 KiB; 5 s timeout; two concurrent invocations per project. A function never receives a project key: pass one in the invoke body if it must reach Native.