قيّم محليًا.وتحقّق من كل شيء.

import { createClient } from "@nanoflags/sdk";

const flags = createClient({
  sdkKey: process.env.NANOFLAGS_SDK_KEY!,
  baseUrl: "https://edge.nanoflags.io",
  service: "checkout-api",
});
await flags.ready();

const result = flags.evaluate("checkout-v2", false, { key: user.id, region: "EU" });
// { value, reason: "rule_match", ruleIndex: 1, inRollout: true, bucket: 37.12, revision: 184 }

flags.on("update", (u) => console.log("r" + u.revision, u.transport, u.latencyMs));

import { createClient } from "@nanoflags/sdk";

const flags = createClient({
  sdkKey: "nf_pub_…",            // browser key: only client-exposed flags
  baseUrl: "https://edge.nanoflags.io",
});
await flags.ready();

if (flags.boolean("new-onboarding", false, { key: visitorId })) showNewOnboarding();

import { createClient } from "@nanoflags/sdk";
import { NanoFlagsProvider, useFlag, useFlagsStatus } from "@nanoflags/sdk/react";

const client = createClient({
  sdkKey: "nf_pub_…",
  baseUrl: "https://edge.nanoflags.io",
  bootstrap: window.__FLAGS__, // the bundle the server rendered with, so the first render matches
});

export function App({ user }) {
  return (
    <NanoFlagsProvider client={client} context={{ key: user.id }}>
      <Checkout />
    </NanoFlagsProvider>
  );
}

function Checkout() {
  const v2 = useFlag("checkout-v2", false);
  const { status } = useFlagsStatus(); // "not-ready" | "ready" | "stale"
  return v2 ? <NewCheckout /> : <OldCheckout />;
}

import os
from nanoflags import NanoFlags   # pip install nanoflags

flags = NanoFlags(os.environ["NANOFLAGS_SDK_KEY"], service="checkout-api")
flags.wait_until_ready(timeout=5)  # never raises

on = flags.bool_variation("checkout-v2", False, {"key": user.id, "region": "EU"})
# Evaluated locally. Falls back to False only if no config has ever loaded.

flags.on_change(lambda e: print(f"r{e.revision}", e.transport, e.latency_ms))

import nanoflags "github.com/motazalmaroai/nanoflags-sdk/go"

client, err := nanoflags.New(os.Getenv("NANOFLAGS_SDK_KEY"), nanoflags.WithService("checkout-api"))
if err != nil {
	log.Fatal(err)
}
defer client.Close()
_ = client.WaitForReady(ctx) // nil once a configuration is in use

on := client.BoolVariation("checkout-v2", nanoflags.Context{"key": user.ID, "region": "EU"}, false)
// Evaluated locally. Falls back to false only if no config has ever loaded.

# 1. Public signing keys (no authentication)
curl -s https://edge.nanoflags.io/v1/keys
# {"keys":[{"kty":"OKP","crv":"Ed25519","x":"…","kid":"k1","alg":"EdDSA","use":"sig","status":"active"}]}

# 2. A signed bundle and its signature headers
curl -s -D headers.txt -o bundle.json \
  -H "Authorization: Bearer $NANOFLAGS_SDK_KEY" https://edge.nanoflags.io/v1/bundle
grep -i '^x-nanoflags-' headers.txt
# X-NanoFlags-Signed: true
# X-NanoFlags-Key-Id: k1
# X-NanoFlags-Signature: …
# X-NanoFlags-Environment-Id: …

# 3. Ed25519 signature over this canonical string
nanoflags-bundle-v1
<environment id>
<revision>
<checksum>
<sha256 hex of bundle.json, byte for byte>