/** Safe PHION reference flow: DISCOVER -> INTENT -> PREFLIGHT. Never pays or executes. */
const base = "https://phion.systems";
const headers = {
  "content-type": "application/json",
  "user-agent": "phion-reference-client-typescript/1.46.4",
  "x-phion-discovery-source": "reference_client",
};
const get = async (path: string) => (await fetch(base + path, { headers })).json();
const post = async (path: string, body: unknown) =>
  (await fetch(base + path, { method: "POST", headers, body: JSON.stringify(body) })).json();

const discovery: any = await get("/v1/discovery");
const intent: any = await post("/v1/intent", {
  intent: "verify public web evidence with signed sources",
  budgetUsdc: 0.005,
});
const service = intent.recommendedService ?? intent.eligibleServices?.[0];
if (!service) throw new Error("PHION abstained: no eligible service");
const preflight = await post("/v1/preflight/service", {
  serviceId: service.serviceId,
  input: { url: "https://example.com" },
  network: "eip155:8453",
  intentId: intent.intentId,
  correlationId: intent.correlationId,
});
console.log(JSON.stringify({ serviceCount: discovery.serviceCount, intent, preflight }, null, 2));
// Stop here. Inspect the immutable offer and payment requirements before authorization.